Machining Centers

Guide of Laser Cutting Machine: The Right Way to Find Laser Cutting Equipment

This type of capital equipment expenditure is a big deal, so fabricators should know what to ask to find the right fit.

 

Tailift Laser Cutter 

For most manufacturers, buying an industrial laser cutting machine is a major investment. It’s not just the initial price you pay, but the fact that the purchase will have a great impact on the entire manufacturing process. If the wrong equipment is chosen, you have to live with the decision for quite a long time. It is not unusual to see manufacturers keep a laser for seven to 10 years.

 

Do you know the best way to go about purchasing a laser cutting machine? Even if you currently own one, how long ago did you buy it, and what has changed since then?

 

This guide should help you in making a capital purchase decision that will drive your manufacturing operations to new heights.

 

What’s The Application?

Perhaps the real question is, “Should I even be buying a laser cutting machine?” For many reasons, investing in a different cutting system may make more sense for a company’s manufacturing activities. Investigating all available options can minimize any possible regrets in the future.

 

Depending on the part volume, a stamping press may deliver the lowest cost per part. When speaking of metal forming in a press, however, you also are talking about the need to invest in tooling. Stamping also presents the ability to perform multiple tasks, such as forming and tapping, as part of the production process.

 

A traditional turret punch press can cut out holes and shapes economically, but, again, it involves tooling. A punching machine also can’t match the production speeds of laser cutting machines. As with a stamping press, some forming can be done on the punch press.

 

A high-definition plasma system is good for thick materials and for applications in which the edge quality isn’t critical. An abrasive waterjet also is good for thick materials and for applications in which the metal can’t have a heat-affected zone, which is a problem with most thermal cutting methods. Both plasma and waterjet cutting systems cost less than laser cutting machines, but many times do not match the laser’s cutting speed. Of course, plasma cutting and waterjet systems can boost productivity with the use of multiple heads and the ability to cut stacked blanks; the application obviously would influence what exactly you need.

 

Do We Really Need to Invest in Laser Cutting?

A company that doesn’t have a laser cutting machine generally subcontracts the work to one or several job shops with that capability. This scenario doesn’t involve a lot of risk and can work if you have some flexibility with lead times.

 

But there will come that time when you have to ask yourself if it is time for the company to bring laser cutting in-house. This has to be considered even if the business relationship with the subcontractor is great.

 

How do you know if it is the right time to own a laser? Look at how much you are spending monthly for laser-cut parts. In the words of Henry Ford, “If you need a machine and don’t buy it, then you will ultimately find that you have paid for it and don’t have it.”

 

If the decision is made to bring laser cutting in-house, you may be put in a position where you need to justify why the investment needs to be made. The costs associated with subcontracting out the laser cutting are just the starting point for the justification. How much more productive will the manufacturing process be with in-house laser cutting? How does this affect lead times? From an expense standpoint, not only do you have the cost of the laser cutting machine, you have labor and consumable costs, such as laser cutting assist gas.

 

Figuring out these answers will give upper management or even a lending institution an idea about production savings and subsequent return on investment following the initial investment.

 

What Does It Mean to Control the Laser Cutting Process?

Other than monetary issues, when manufacturers offer reasons as to why they are looking at purchasing a laser cutting machine, they mention “control.” Ask yourself these questions to see if you fall into this category:

 

  • How many times have we lost business because of late delivery?
  • Have we ever had to reject parts because of poor quality?
  • How would it help our image if we had our own laser cutting capabilities?

 

Who Should We Buy the Laser Cutting Machine From?

As a manufacturer, you have numerous sources to purchase a laser cutting machine. There are dealers that specialize in used equipment and original equipment manufacturers that offer state-of-the-art cutting equipment and even refurbished machines that may not have the production process of new machines, but still can perform much more efficiently than machines of a similar age with no rework done to them.

 

Ask the OEMs questions about service availability. Today’s technology does not require as much maintenance, but when a machine goes down, you’ll want it back up and running as soon as possible. Also find out about parts availability and delivery. Again, a laser cutting machine that can’t cut because of a damaged part just doesn’t cut it.

 

Be aware that laser cutting machines from OEMs that are recognizable in the industry typically have higher resale values.

 

CO2 or Fiber Technology?

Two types of lasers currently make up a majority of the industrial market: traditional CO2 gas lasers and newer solid-state fiber lasers. CO2 lasers have been the workhorses of the metal fabricating industry for the previous two decades. These lasers operate by running electricity through a gas-filled resonator (which includes CO2) and using mirrors to focus and deliver the beam. In a fiber laser, banks of diodes are used to create the laser, and it is channeled and amplified through fiber-optic cable, similar to that used in the telecommunication industry.

 

The fiber laser, which made its debut around 2008, has lower operating costs and delivers higher cutting speeds than the CO2 laser. Early on the fiber technology could cut at these higher speeds only on thin materials, but with the advent of more powerful lasers, fiber lasers are demonstrating robust cutting speeds even in 0.5-in.-thick material. As a result, fiber laser cutters tend to be a popular choice, despite their higher price.

 

Also, fiber technology may open new opportunities for a fabricator. These machines can cut reflective material, such as brass and copper, whereas it is difficult for CO2 lasers.

 

Some applications still remain better suited to CO2 lasers, such as applications that require good edge quality on thicker or specialized materials. Also, some manufacturers may feel comfortable with CO2 technology because they’ve used it for several years, and the company has in-house maintenance expertise.

 

After the end of the warranty period, keep in mind that you will have to make a decision about ongoing maintenance. Are you comfortable relying primarily on the OEM for service, or do you like to be self-sufficient, perhaps relying on a third-party source for any maintenance? Because the fiber laser has fewer moving parts or mirrors when it comes to laser generating, unlike a conventional CO2 resonator, it will require less maintenance over its lifetime.

 

Will We Need Material Handling?

Choosing some level of automatic material handling equipment also is an important consideration. This is even more important today, primarily because of the significantly faster cutting speeds of the fiber laser technology.

 

That’s why it’s necessary to understand just how you will use this new laser cutting capability. Do you plan to run the laser only a few hours each day or multiple shifts? Based on the typical time to process a sheet of material, can your operator keep up with manually loading and unloading the laser, even if it has a second shuttle table? How important is minimizing the labor cost in the part production to making a profit and remaining competitive in your business?

 

Sometimes metal fabricators choose not to buy material handling automation immediately. If you choose this route, ensure that pallet systems or even an automated storage and retrieval tower can be added easily in the future.

 

Will We Need New Software?

In many instances, manufacturers are already using a software package that everyone is used to. Will that software be able to work efficiently with the new laser cutting machine, or will you be better off purchasing the OEM’s software? If the latter, what new capabilities come with the new software?

 

As more of the manufacturing world is talking about increased interconnectivity among machines and software systems, it behooves you to ask if the new software is capable of running other machines already in place on the shop floor. Additionally, it’s worth having a conversation as to how the laser might integrate into the company’s network. Laser cutting speeds aren’t the only thing increasing at an incredibly fast pace; collecting pertinent manufacturing information in the blink of an eye is leading to more timely and impactful decision making for manufacturers.

 

What Is the True Cost of Running the Equipment?

With such a large investment, a manufacturer needs to know at what level of efficiency the equipment is operating. You need to know more than just if the machine is running or not running. This is where equipment performance monitoring comes in.

 

It’s important for you to find out if software can measure the laser cutting machine’s overall equipment efficiency (OEE) in real time. If so, can the software be used for your other laser cutting machines, if you have them, so that you might discover “hidden capacity” where you thought there was none?

 

With the cost of about 1 percent of the equipment price, monitoring software can provide a 10 to 50 percent productivity gain with paybacks of less than four months.

 

How Will We Finance the Purchase?

While some manufacturers pay cash for a laser, the majority use some method to finance the purchase. Don’t assume that your bank is the best source for funding the laser equipment purchase. Look at other alternatives, including the OEM, many of which own their own financing arms.

 

Also, don’t assume you will receive better service if you choose the OEM’s financing option.

 

What’s Involved with Delivery and Installation?

Preparation is required for a successful delivery and installation. First, what type of foundation, if any, is going to be required? Second, the laser cutting machine has to be located in the right place in the facility, preferably away from harsh environmental areas. You also should have found the best location for the laser so that it contributes to an efficient flow of laser-cut blanks to downstream manufacturing processes.

 

For a lot of companies, the delivery of a new piece of major manufacturing equipment is a new experience. The company that supplied the laser cutting machine can answer your questions about shipping and rigging; they do this all the time.

 

What Can Be Done to Make the Purchasing Decision Easier?

Answering these questions and obtaining quotes based on the feedback can be used to narrow down the selection of the supplier of a laser cutting machine to two to three sources. From there you need to find the right model, ask the right questions during equipment demonstrations, and work toward an acceptable price. Remember, there are many important items to discuss during the final negotiation.

 

The purchase of such a machine can be an overwhelming task. That’s why it might make sense to join an industry association, such as the Fabricators & Manufacturers Association, to network with manufacturing peers to learn from them, or even seek out the assistance of someone that has been through or is familiar with this type of industrial equipment purchase. Such an effort likely would prove to be worthwhile.

 

If you have interest or requirement of laser cutting machines, I recommend you to visit Tailift Co., Ltd. – they are the world-famous fiber laser cutting machine manufacturer. You can find high quality, efficiency, and accuracy laser cutters at Tailift. Now, contact with Tailift for more details of laser cutting.

 

Article Source: thefabricator.com

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How to Make More Money with Vertical Machining Centers

If you’re a job shop, you buy machines to make money, and chances are you’re using vertical machining centers. The machine you buy, and how you deploy it, has everything to do with how profitable your shop will be.

 

If you’re like most machine shops, you have tons of machining capacity sitting idle on your shop floor. The average vertical machining center, even when it’s in cycle, isn’t cutting 30% of the time. Worse, the real cutting, that other 70%, is likely much slower than what’s achievable with today’s technology. Add all the other time your machine isn’t running—setup, workpiece load/unload, cutting tool maintenance, clearing chips, etc.—and the typical vertical machining center is only making chips 34% of the time. Multiply all those wasted hours by your shop rate, and that’s what non-cutting time is costing you day after day, year after year.

 

Simply, to get more production out of a vertical machining center, you just have to do two things:

 

  1. Decrease cycle times by improving metal removal rates and reducing parasitic non-cutting time.
  2. Increase spindle utilization by eliminating unnecessary interruptions to production.

 

That’s easier said than done, and your options can be limited when using outdated or under-powered equipment. Here’s what to consider making more money with your next and existing vertical machining centers.

 

More Efficient Machining

There are about 260 vertical machining center builders to choose from, and often their spec sheets look pretty much the same. There are, however, a few key factors that really differentiate one machine from another:

 

  • Rapid Rates –

    In-cycle non-cutting time is mainly comprised of rapid traverse moves and tool changes. The rapid rate is always on the spec sheet, but just as important is the axis acceleration/deceleration rates because they determine how quickly speeds max can be achieved. If moves are small, the real rapid rate may not matter at all, but larger moves (and parts) it can indeed be consequential.

 

  • Horsepower –

    HP is another widely misinterpreted spec, because what really matters is not the one top HP number on the spec sheet, but how much power the machine can generate across the entire speed range.

 

  • Torque –

    It’s the same situation with torque. Available torque at the low end makes a huge difference in achievable metal removal rates, particularly when hogging metal at slower speeds. Just like in a car, torque becomes less important as spindle speed increases. There, the machine’s ability to hold accuracy at higher feed rates becomes the critical factor.

 

  • Speed –

    The ability to cut at high spindle speeds isn’t just about metal removal rates. It enables shops to use some of the enhanced cutting tools that have come out in recent years that are designed for high-speed machining. Moreover, in combination with the ability to accurately execute high feed rates, high-speed cutting enables shops to more efficiently generate excellent quality 3D surfaces when required.

 

A machine’s ability to perform well in all of these aspects—power, torque and speed—is especially critical to a job shop that cuts a wide variety of materials. One day you’re facing off a steel part and want to use as big a cutter as possible; you need torque. The next day, you’re hogging aluminum and need power. Then you move to brass where you need speed. What you really need is a vertical machining center that handles all of these requirements.

 

If you have any interest in vertical machining centers, I recommend that you can visit Tailift Co., Ltd. – the company specializes in kinds of high quality machinery, such as CNC punch press, laser cutting machine, radial drill machine, and machining centers. Get more details, welcome to check out their website and feel free to contact with Tailift.

 

Article Source: https://www.mmsonline.com/articles/how-to-make-more-money-with-vertical-machining-centers

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Ward Hi-Tech Widens Its Product Line with Vision Wide Double Column Machines

Sheffield-based CNC machine tool distributor, Ward Hi-Tech has signed an exclusive sole UK and Ireland distribution agreement with Vision Wide of Taiwan.

 

Vision Wide is one of Taiwan’s leading manufacturers of double column machining centers and its product range encompasses a wide-ranging portfolio of DCM models with X-axis travels up to 10m and a range of specifications covering both heavy-duty and high-speed machining requirements.

 

Vision Wide DCM machining centers can be equipped with high torque, high power spindle motors for arduous operational requirements and high-speed electro spindles and spindle options for rapid machining processes.

 

State-of-the-art universal milling head options encompassing the latest design technology provide everything from standard spindle arrangements to five-face and continuous 5-axis milling capability, with automatic head changing alternatives available on all models.

 

For over 20 years Vision Wide has been supplying high specification, high production machines to a large range of industry sectors including aerospace, automotive, power generation, shipbuilding and a wide range of component manufacturing industries.

 

“The company’s philosophy of concentrating solely on the design, build and continuous model improvement of double column machining centers has enabled them to build an enviable reputation both in the home and worldwide marketplace,” commented Ward Hi-Tech’s general manager of special projects, Richard Pearson.

 

“We’ve been looking to expand and enhance our current wide-ranging product portfolio by adding an additional double column machining center range and our partnership with Vision Wide provides us with a perfect platform to develop additional business opportunities in certain sectors that rely upon large frame, high metal removal double column machines. We are already working on several high value projects that may bear fruit in the coming months.”

 

Ward Hi-Tech is also sole UK distributor for Hwacheon, Dah Lih, Kiheung, SFM and HNK.

 

If you have any interest in Vision Wide Double Column Machining Center, please do not hesitate to come and visit Vision Wide Tech Co., Ltd. right away!

 

 

Article Source: https://www.pesmedia.com/ward-hi-tech-widens-product-line-vision-wide/

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Buying a Five-Axis: Selecting the Right Machine

Horizontal or vertical? Trunnion or swivel head? What’s the effective difference between different configurations of five-axis machining centers?

 

Not all 5 axis machining centers are alike. Here’s where the application for which they will be used must be considered. You need to know what cutting speeds you’re going to run, for example. The type of spindle, the arrangement of rotary axes, rapid traverse rates, feed rates and available horsepower are other major considerations. Do you intend to machine primarily aluminum, stainless steel or titanium? How rigid does the machine need to be? What surface-finish quality do you require? What part accuracy are you trying to achieve? These are all questions you’ll need to answer in order to select the right machine for your application.

 

If you’re primarily machining aluminum, you may prefer a spindle capable of higher speed, such as 20,000 rpm, with higher rapid traverse rates, especially if you’re using smaller-diameter tools. Likewise, if you’re machining stainless or alloy steel for complex mold surfaces, you will likely be using small tools and high spindle speeds to achieve exceptionally smooth surface finishes.

 

Be aware that some machines are designed for cutting only aluminum. Others are suitable for steel and tough alloys, which require more rigidity, higher horsepower, lower spindle speeds, slower rotary speeds, higher torque and stronger box ways to make deep cuts with bigger tools. Machining different grades of steel, titanium alloys or even harder materials may require a heftier machine; however, this hefty machine would need to rotate the table excessively fast to achieve adequate surface speeds for cutting aluminum. The result might be disappointing.

 

When specifying out a five axis machining center, obtaining the expert advice of an experienced engineer is recommended.

 

Horizontal or Vertical

Horizontal five-axis machines are normally equipped with an automatic pallet changer (APC) ready to be installed on the shop floor. If you’re machining aerospace components that have deep pockets or waffling designed to reduce finished-part weight, the high volume of chips will naturally drop into the conveyor. In addition, horizontal five-axis machines tend to be heavier and more rigid, which helps when cutting steel and titanium.

 

In contrast, vertical five-axis machines tend to be more agile for processing smaller parts. VMCs tend to enable better operator access and can often take heavier cuts, but clearing chips can be inconvenient. High-pressure, through-the-spindle coolant delivery comes in handy to remedy chip accumulation.

 

Swiveling-Head or Trunnion Style

There are pros and cons to different types of machine designs. If you’re loading heavy parts, the non-tilting table on a swiveling-head machine is often preferred, because this type of table offers greater rigidity for holding big, heavy parts. The swiveling head enables the use of shorter, standard tooling, because all tool rotations occur above the part. Swiveling-head machines tend to be more versatile, lending themselves to using multiple fixtures, vises or tombstones. This somewhat simulates the appeal of an HMC.

 

A trunnion-style machine is often preferred in moldmaking, because both rotary axes are contained in the trunnion table itself and the spindle head is stationary. This configuration is similar to that of the three- or four-axis machines most moldmakers are already used to. The spindle head reaches out over the tilting table, providing better undercut capabilities and some access to the underside of the part. As the spindle head itself does not rotate, trunnion-style machines tend to be more effective in heavy chip removal and can use full X, Y and Z travels to accommodate large parts.

 

If you need more information about 5 axis machining center, please do not miss Vision Wide Tech Co., Ltd. – the company is the professional CNC machine tool manufacturer owning brand “VISION WIDE”, provides wide range products from heavy cutting to high speed, from 3-axis spindle to 5-axis spindle, and from metal cutting to composite material machining centers which have been applied in vehicles manufacture, power generating, aerial components and so on. Widely applied in curve-based polyhedral machining. Learn more details, welcome to visit Vision Wide immediately.

 

Article Source: Modern Machine Shop

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The Value Proposition of Five-Axis Machining

Moving to five-axis machining is a big commitment. What exactly are the concrete benefits of five-axis machines compared to three-axis machines?

 

The “five” in five-axis machining refers to the number of directions in which the cutting tool can be oriented as it approaches the part surface. This maneuverability provides almost unlimited possibilities for the type and shape of parts one can effectively machine. A significant advantage of five-axis capability is being able to process five sides of a part in a single setup. All sides are accessible except the one resting on the table. For this reason, shops that don’t have full five-axis work involving complex shapes can still benefit greatly from the five-sided machining a five-axis unit allows.

 

If parts being produced on a three-axis machine must be flipped over or repositioned, producing them on a five-axis machining center in one setup may be more profitable. Most often, the process on a three-axis VMC requires flipping the part, or rolling it around from fixture to fixture, to access all sides the part. Unfortunately, whenever the operator must open the door of a VMC to flip or rotate the part for this purpose, or to load or unload the part, remove chips, or perform in-process quality checks, the spindle must be stopped. This means that a part requiring machining on six sides may have to be moved by the operator seven times (load, reposition five times, unload). Five-sided machining eliminates these extra stoppages.

 

With five-axis machining, you can grip the part, perform all roughing operations, and then go back and finish machining—in essence, gripping the part only one time. This capability enables you to machine part features in the order that is most convenient and may make the most sense for optimum material removal. For example, a part may have neighboring features that chatter or vibrate. These features can be roughed from both sides to reduce the chatter. Being creative with the processing steps is likely to enable you to conquer more challenging features with the added flexibility.

 

Another advantage to five-sided machining must be mentioned here. If holes on a prismatic part must be located to key features with a tight tolerance, five-sided machining may enable the part to be positioned on the side that requires the least machining, leaving a high percentage of features accessible for processing in a single setup. On a highly accurate machine with five-sided capability, the position of these features will correlate. This is not usually the case when using multiple holding fixtures on a three-axis machine. Machining features in one operation reduces location errors resulting from moving the part.

 

From a mathematical or statistical process-control standpoint, process capability for, let’s say, 30 parts produced on a five-axis machine versus on a conventional machine will be higher on the five-axis machine by eliminating the human involvement required for part repositioning. Even on the most finely tuned conventional machine, slight error is introduced whenever parts are handled by the operator. Using five axes to complete a part in one cycle with little or no operator intervention avoids this source of error.

 

Having said all this, you might be surprised to learn that a five-axis machine is never quite as robust as a three-axis machine. In addition to X, Y and Z axes, the rotary tables or trunnion add more mechanical joints susceptible to flex and wear. Do not let this concern you. Most shops will use 3+2 positioning for the roughing cycle and then use full five-axis machining to finish. Position, then hog, position, then hog, then use five-axis machining to finish the part gracefully.

 

Machining molds on a three-axis machine has its own challenges and limitations. For deep-pocket molds or tall-core molds, the required tools tend to be longer and smaller in diameter. Feed rates must be slowed to minimize tool chatter and prevent breakage. In contrast, with full five-axis machining, you can use shorter, stouter tools; have better access to the surface without Z-axis interference; take heavier cuts; increase feed rates; remove more material faster; and achieve better surface finishes, all while requiring fewer setups and shorter machining times. The incremental increase in costs for a five-axis machine compared to a three-axis machine will generally be absorbed quickly through increased efficiency.

 

The current technology in today’s five-axis machines delivers greater capability. These machines always seem to get the job done faster by enabling you to do more work in a single operation. There are fewer operations to program and fewer fixtures to create, and there is less flipping of parts and less in-process movement of parts around the shop. This overall increase in shop efficiency means more money in the bank. Perhaps it’s time to start thinking seriously about five-axis machining.

 

If you have any interest in 5 axis machining center, please try to visit CNC-TAKANG Co., Ltd… It is the company of specializing in various lathe machines. You can find CNC lathes, double column machining centers, precision lathes, heavy duty lathes, and much more machinery on its website. More details, do not hesitate to check out their website and feel free to send inquiry to CNC-TAKANG.

 

 

Article Source: https://www.mmsonline.com/blog/post/the-value-proposition-of-five-axis-machining

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Buying a VMC: Considering Toolchanger, Coolant Delivery and Chip Removal

Among characteristics like structure and spindle quality, here are a few factors to consider when buying a vertical machining center.

 

Whether it’s for a toolroom, a job shop or a production house, there are a lot of factors to consider when it comes to acquiring a vertical machining center (VMC). Key preliminary considerations include the intended application and workpiece(s) and the needs of a shop’s various departments. And then there’s the research and data-gathering process.

 

In addition to characteristics like structure and stability and spindle details, potential VMC buyers should keep in mind how the toolchanger, coolant delivery and chip disposal systems contribute to overall machine efficacy.

 

Selecting the Toolchanger

 

The toolchanger specified for a new VMC must have an adequate number of tooling pockets and be able to accommodate the size and weight of the cutting tool assemblies. Every VMC has a maximum tool weight and diameter that its toolchanger can handle to prevent a tool from dropping out of the pocket.

 

In high-production environments, where many tools may be required to machine the parts, tool-change time can have a substantial influence on efficiency. For example, having a machine capable of a 1.4-second chip-to-chip tool-change time, rather than 3.6 seconds, can quickly add up to more productivity and profit.

 

Coolant Concerns

 

For certain applications, optional provisions for delivering coolant at high pressure directly through the spindle are recommended. Coolant pressure as high as 1,000 psi is intended to promote chip evacuation from deep bores in which chip breaking is directed at the tool point. Unlike time-consuming peck-drilling cycles, through-the-tool, high-pressure coolant enables the material to be removed in one pass. This approach may reduce drilling time by as much as 30 percent. Additionally, the part remains cooler, surface finishes inside the bores are protected, accuracy of the parts is maintained and cutting tools last longer.

 

For high-pressure coolant, the capacity of the coolant tank may need to be enlarged. Likewise, an oil skimmer may be an option to consider for extracting waste oil from water-soluble coolant.

 

Chip Removal

 

Chip removal is an important consideration that is often overlooked in the evaluation of a new CNC machine. Whether chips are evacuated from the machining zone with water, oil or air jets, they will fall to the bottom of the machine. A smaller volume of chips can be removed by an auger, which is typically standard on most VMCs, but a large volume of chips may require a conveyor. Although it is possible to have the machine operator manually remove chips from the machine, this task is labor-intensive and messy. Using a chip auger or conveyor to remove chips automatically and deposit them in an external bin is recommended. Pay attention to whether the chip conveyor or auger evacuates the chips from the side or rear of the machine, however. The location of the chute determines how much space will be needed on the shop floor, how close the machine can be placed to other machines or walls, and how easily a fork truck can retrieve a loaded chip bin.

 

If you need more information about vertical machining center, I recommend that you can visit the website of Vision Wide.

 

Vision Wide Tech is a professional and experience vertical machining centers manufacturer based in Taiwan. If you are looking for high efficient, high accuracy and durable vertical central machinery or other machining centers, you can count on them. Visit Vision Wide: www.visionwide-tech.com to get more details.

 

By the way, if you are also looking for coolant, you can visit the website of Min June Hong. The company is the reliable lubricant and oil manufacturer in Taiwan. Learn more details about coolant series, try to click here: www.maxlubeoil.com

 

Related Article:

 

Article Source: https://www.mmsonline.com/blog/post/buying-a-vmc-considering-toolchanger-coolant-delivery-and-chip-removal

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Buying a VMC: The Basics of Spindle Speeds and Tapers

What’s the difference between CAT, BT and HSK tapers? These and other questions are important when considering a new vertical machining center.

 

Whether it’s for a toolroom, a job shop or a production house, there are a lot of factors to consider when it comes to acquiring a vertical machining center (VMC). Key preliminary considerations include the intended application and workpiece(s) and the needs of a shop’s various departments. And then there’s the research and data-gathering process.

 

In addition to characteristics like structure and stability, potential VMC buyers should be aware of machine spindle considerations.

 

Spindle Speeds, Torque and Horsepower

 

Selecting a machine with the appropriate range of spindle speeds is a critical consideration. The trends in recent years have been toward coated tooling, smaller tools, shallower depths of cut and higher feed rates. Smaller tools require a higher spindle speed. Faster feeds and speeds deliver better surface finishes. High-speed machining requires less spindle horsepower and torque (twisting force) when taking smaller cuts.

 

In contrast, large-diameter tools such as face milling cutters typically use slower spindle speeds and take deeper cuts to remove larger amounts of material. However, this mode may require greater machine rigidity. Moreover, large tools generally require more horsepower and torque. In addition, large-diameter taps must run at lower rotations per minute (rpm), which calls for higher torque. Alternatively, thread milling can be done at higher speeds, (nearly the same feeds and speeds as a regular end mill), thus requiring less torque. Charts are provided by all machine builders to show the available spindle torque in relation to horsepower and spindle speed. Study them closely.

 

CAT, BT and HSK

 

After selecting the spindle that best meets the horsepower, spindle speed and torque requirements comes selecting the type or style of tooling taper and its size. Tooling taper refers to the peculiar cone shape of the portion of a tool holder that fits inside the opening of the spindle. Every spindle is designed to accept a certain standardized taper style and size. Other styles or sizes cannot be used. Three taper styles are primarily used today: CAT, BT and HSK. The specifications for these tapers are governed by national and international standards.

 

CAT and BT tooling are referred to as V-flange holders, and are the most widely accepted standard for milling in the United States. The BT metric series is the Japanese equivalent and is prevalent overseas, particularly in Europe, where it was originally developed. Both BT and CAT tool holders require a retention knob or pull stud to be secured within the machine spindle.

 

HSK is a German standard meaning “hollow shank taper.” The tapered portion of the holder is much shorter and it engages the spindle in a different manner by using no pull stud or retention knob. The HSK holder was developed to provide greater repeatability and longer tool life, especially in high-speed machining applications.

 

There are limitations and advantages to using any of the three tooling types. Price, availability, accuracy and repeatability vary from style to style. The proper selection is usually based on the application.

 

Selecting the Spindle Taper Size

 

The size of the spindle taper and the corresponding shank taper has much to do with the weight and length of the tools being used and the amount of material to be removed. Although CAT40 is the most commonly used size in the United States, if you already own, say, the equivalent 300 BT30 shanks in your shop, there would be little or no advantage to selecting a CAT40 spindle in a new machine. If you plan to use 3-inch-diameter or larger cutters, take deep cuts, or use tools that are more than 20 inches long, a CAT50 taper would probably be best. Using a holder of this size for heavy or long tools helps prevent excessive side loads on the spindle bearings. (This problem is more common with horizontal machines on which tool droop can add to unwanted forces.)

 

If you need more information about vertical machining center and tool holder series, there are two companies that I recommend to you. They are:

 

SEHO Industry Co., Ltd. is the ideal source for full series of CNC machining centers, whether you need vertical machining center or horizontal machining center. You can find new and used CNC machinery on their website. Visit SEHO: www.sehoworld.com to get your ideal VMCs.

 

Shin-Yain Industrial Co., Ltd. is the professional tool holders manufacturer in Taiwan. You can find CAT, BT and HSK tool holders on their website. Learn more information about tool holders, please do not hesitate to check out SYIC’s website here: www.syic.com

 

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Buying a VMC: Considering Structure and Stability

Design and construction govern a vertical machining center’s ability to machine parts to tight tolerances with accuracy and repeatability.

 

Whether it’s for a toolroom, a job shop or a production house, there are a lot of factors to consider when it comes to acquiring a vertical machining center (VMC). Key preliminary considerations include the intended application and workpiece(s) and the needs of a shop’s various departments. And then there’s the research and data-gathering process.

 

Among the numerous machine tool characteristics to scrutinize before buying a VMC are machine structure and stability.

 

Accuracy and Repeatability

The ability to machine parts to a tight tolerance and to do so time after time must be considered. That is where a machine’s design and construction come into play. Its ability to achieve the required precision and accuracy, and the number of parts to be machined, will influence the quality of machine that’s needed and the price it will demand. The higher the accuracy and the larger the quantity of parts to be produced, the higher the price tag the buyer can expect.

 

Because of the characteristics of a C-frame design, a VMC’s thermal stability can be a challenge. Just as a sturdy house requires a solid foundation, the same is true for a stable machine tool. Most superior vertical machining center structures are engineered using finite element analysis (FEA) software. It’s not simply the weight of the machine that matters; it’s also its design and the placement of the weight that determines its rigidity and stability.

 

Accuracy and repeatability must be designed and built into the machine, regardless of its price. Some are equipped with large ballscrews and a different pitch to enhance accuracy. Laser and ballbar calibration can be used to ensure better part accuracy, but only up to a point. A poorly designed machine will never consistently produce high-accuracy parts.

 

Thermal Growth and Components That Counter It

Machine stability is primarily affected by thermal growth. Spindles generate heat, as do ballscrews, machine tables and guideway systems. In addition, the faster a machine moves, the more friction and heat it generates. This heat contributes significantly to changes in the size and position of machine components, causing a machine to “grow” or distort and the location of the spindle nose or tool point to move unpredictably. Because of these shifts, one of the biggest challenges of five-axis machining is the inability of the control system to calculate the exact position of axis pivot points at all times.

 

To combat this heat and the unwanted growth it causes, chillers are used to cool ballscrews and control the temperature of spindles and spindle housings. Thermal sensors that measure and automatically counteract machine growth are located at key points on the machine. These provisions are especially critical in die/mold applications in which longer machining times allow more heat to accumulate. Left uncontrolled, thermal distortion in the machine can result in unacceptable errors in the shape of the finished mold. It may not be possible to correct these errors.

 

High-end machines usually employ scale systems on each axis rather than the standard encoder feedback systems supplied with most vertical machining centers. Anti-backlash systems are often engineered into the ballscrew nut to improve machine repeatability. Likewise, certain guideway systems are designed for high-speed, low-friction operation to help control thermal growth. Of course, all of these special features come with a price. High-performance VMC spindles can range in price from $4,000 to $30,000. There is a big difference in design between a “value-priced” $50,000 machine and a high-end VMC with a $300,000 price tag. That said, if accuracy requirements aren’t especially tight and if part quantities are manageable, then the value-priced machine may suffice. Know what you need!

 

A Firm Foundation

A machine’s foundation and placement on the shop floor can greatly affect performance. Although it may be OK simply to set commodity machines on an existing concrete or wood floor, machining at high rates with rapid axis acceleration may require the machine to be tied down so it doesn’t “walk” across the floor. Heavy depths of cut on some materials also may cause excessive vibration, requiring the machine to be securely anchored to the floor. In some cases, it may be necessary to install a steel-reinforced concrete base that is isolated from the surrounding floor.

 

It’s important to note that a machine should never be located over a joint or crack in an existing concrete floor. The uneven support will make it impossible for the machine to perform accurately.

 

Jiuh Yeh, a Taiwan manufacturer, has carried metal cutting solutions for the difficulties confronting all businesses. The arrangements that take after are consolidated into almost every part of the daily life and they are heavily applied from aviation to nourishment preparing, medical to mining, transportation to energy, and much more. If you need more information about vertical machining center and other excellent machinery, try to visit Jiuh Yeh: www.jiuhyeh.com

 

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Benefits of Using An Automatic Coil Winding Machine

A coil winder is an integral part of all electrical devices present in the manufacturing companies. In such companies, every device either transforms the current or voltage from one rating to the other. To produce these components, a coil winding machine winds the magnetic wires in a circular form over an iron core having magnetic properties. A little additional equipment is also necessary to wind these components.

 

Coil winding machines perform many other tasks apart from winding electromagnetic coils on an iron core. A special type of coil winding device called the automatic winding machine comes with many features.

 

The following are the uses of an automatic coil winding machine:

 

  1. In electrical industries, it can be used for the production of transformers,
  2. It is used in electrically driven motors called AC drives,
  3. It is widely used in solenoids and various other electrical devices.
  4. It is used in telecommunication industries that require automatic winding machines to run transformers.

 

Thus, an automatic winding machine will be in demand till we keep using electrical devices like motors, solenoids and transformers. These devices are for industrial use. However, we need coil winding machines for our home appliances too. Mixer- grinders, air conditioners, fans etc. all require this machinery fitted into them.

 

We also understood that to facilitate a manufacturing process any industry would require an automatic winding machine. Moreover, they also require different types of additional equipment to add value to the production unit.

 

Remember that by using a coil winding equipment will significantly decrease your production costs. These machines are available with various manufacturers. If you are thinking of buying little equipment, you can also search online for reputed manufacturers and sellers of automatic winding machines. A little research will help you make a good buying decision. Firstly, you will have to consult the various manufacturers you have shortlisted and ask them for a quote. Then, you must check whether their add-on equipment is compatible with your automatic winding machine. This equipment would basically include an auto feeder, a bobbin holder, a bobbin remover, inductive parameters measuring equipment and many more.

 

If you are interested in learning more information about coil winding machine, I recommend that you can visit the website of DETZO Co., Ltd.

 

DETZO provides automatic machine line, coil winding machine, pin inserting machine, and more machines for customers. Need more details, please feel free to send inquiry or contact with DETZO directly!

 

Your Best Global Partner for Coil Winding Machines – DETZO

 

 

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Victor Taichung Takes Milling to The Next Level With New P76 VMC Series

Victor Taichung P76 Vertical Machining Center

High performance milling has just been taken to a new plateau with the arrival of the new P76 vertical machining center from Victor Taichung. The new 3-axis VMC only recently arrived in the UK and it is already setting new standards for performance, productivity and precision among the subcontract machining community.

 

Quality is assured with Victor Taichung and this latest addition to the stable at the Rochdale Company is the epitome of a high quality machining center. The new P76 incorporates a 30 tool ATC that can change tools in a blistering 1.6 seconds with a chip-to-chip time of 4 seconds. This speed is matched by the rapid feed rates of 48m/min in X and Y axes with 32m/min possible in the Z plane.

 

Not only does the new P76 have the facility to speed around its X, Y and Z work envelope of 760mm by 500mm by 510mm, the machine also demonstrates rigidity and stability through its BBT-40 face and taper contact spindle configuration and the certified meehanite structure that has an extremely wide base of 1166mm. Whilst the BBT spindle system enforces rigidity through the spindle nose and cutting tool to improve tool life, cutting speeds and feeds; the exceptionally wide casting base dampens vibration and adds stability. The result is the ability to conduct heavier cutting at higher speeds and feeds, which will certainly improve productivity. Furthermore, these characteristics will enhance surface finish and precision for the end user.

 

To increase material removal rates, the P76 has an 18.5kW spindle motor that delivers high torque levels throughout the speed range that reaches a top spindle speed of 12,000rpm. Accepting a maximum component weight of 500kg on its 840mm by 500mm table, the new P76 machining center is loaded with a range of standard accessories that includes a fully enclosed splash guard, FANUC 0i-MF CNC control unit with a user friendly 10.4 inch monitor and spindle oil cooler to maintain performance and longevity. Additionally, the P76 offers rigid taping, remote MPG, 3-step warning light, leveling pads, auto power-off and a screw type swarf removal system.

 

The base model of the new P76 is very well equipped to meet the demands of the modern machine shop. However, for end-users looking for a higher-specification solution, Victor Taichung can tailor the machine to the needs of the customer with optional extras that include a 40 tool ATC, coolant gun, automatic tool length measurement, auto part measuring and even a 4th and 5th axis interface. For enhanced precision and meeting the needs of high speed machining, the P76 can be configured with a 15,000rpm spindle, linear scales, rotary tables, oil skimmer, automatic doors, through spindle coolant, a Heidenhain TNC-620/640 CNC control and much more. For more information on how the new compact powerhouse from Victor Taichung can improve your machining performance, call Victor Taichung.

 

 

Victor Taichung Machinery Works Co., Ltd.

No. 2088, Sec. 4, Taiwan Boulevard, Xitan Dist, Taichung City 40764, Taiwan.

TEL: +886-4-23592101

FAX: +886-4-23592943

E-mail: info@mail.or.com.tw

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