vertical milling machine

Introduction about Types of Milling Machine

The usual classification according to the general design of the milling machines is as follows:


Column and Knee Type Milling Machine

For general workshop the most commonly used is the column and knee type. These machines have a single spindle only. They derive their name “Column and Knee” type from the fact that the work table is supported on a knee like casting which can slide in a vertical direction along a vertical column. The up and down movement of the table can accommodate work of various heights.


Plain Milling Machine

These machines are of the column and knee type and consist of a rigid frame or box structure. It consists of a table, a saddle and a knee. This gives three straight-line movements perpendicular to each other. The arbor is fixed in position, and the tool rotates while the work is fed past the cutter in a straight line. It is a useful machine for manufacturing operation involving simple, straight line cut.


Universal Milling Machine

A universal milling machine is so named because it may be adapted to a very wide range of milling operation. A universal milling machine can be distinguished from a plain milling machine that the table of a universal milling is mounted on a circular swiveling base which has degree graduations and the table can be swiveled to any angle up to 450 on either side of the normal position. This is advantageous when milling spirals. Thus in a universal milling machine in addition to three movement as incorporated in a plain milling machine, the table may have a fourth movement when it is fed at an angle to the milling cutter.


Omniversal Milling Machine

In this machine, the table having all the movements of a universal milling machine, and can be tilted in a vertical plane by providing a swing arrangement at the knee. The entire knee assembly is mounted in such a way that it may be fed in longitudinal direction horizontally. The additional swiveling arrangement of the table enables it to machine taper spiral grooved in reamers, bevel gears etc. it is essentially a tool room and experimental shop machine.


Vertical Milling Machine

There are two types of vertical spindle milling machines. Fixed Bed Type VS Column and Knee Type. A vertical milling machine can be distinguished from a horizontal milling machine by the position of its spindle, which is vertical or perpendicular to the work table. The machine may be a plain or universal type and has all the movements of the table for proper setting and feeding the work. The spindle head which is clamped to the vertical column may be swiveled at an angle, permitting the milling cutter mounted on the spindle to work on angular surfaces. In some machine the spindle can be adjusted up or down relative to the work.


Manufacturing or Bed Type Milling Machine

  • Horizontal Simplex Milling Machine:

These types of machines are production type machines and are of rigid structure which yields high production of interchangeable jobs. It has got one spindle head.


  • Horizontal Duplex Milling Machine:

Milling machines using the two spindles. For finishing two surfaces of casting at a time.


  • Triplex Milling Machine:

Milling machines using the three spindles, two horizontal and one vertical for finishing three surfaces of casting at a time.


Planner type Milling Machine

They are used for heavy work. Upto a maximum of four tool heads can be mounted over it, which can be adjusted vertically and traverse directions. It has a robust and constructions like a planer.


Special type Milling Machine

  • Continuous Feed Rotary Milling Machine:

The construction of the machine is a modification of a vertical milling machine and adapted for machining flat surfaces at production rate. The face milling cutters are mounted on two or more vertical spindles and a number of work pieces are clamped on the horizontal surface of a circular table which rotates about vertical axis. The cutters may be set at different heights relative to the work so that when one of the cutters is roughing the pieces the other is finishing them. Operator may carry out a continuous loading and unloading of the work pieces, while the milling is in progress.


  • Drum Type Milling Machine:

The drum type milling machine is similar to rotary table milling machine in that its work supporting table which is called a drum, rotates in a horizontal axis. The cutters are face mills and are usually roughing and finishing cutters similar to those of a rotary table miller. Fixture is mounted to the drum either on each face or on the periphery. When the work is mounted on the periphery, the operation is usually facing the two ends of the work piece to the precise length. The finished machined parts are removed after one complete turn of the drum and then new ones are mounted on it.


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Significant Features and Functions of CNC Milling Machines

The CNC vertical milling machines are basically machines that operate with vertically oriented tools. Most of the operations include drilling and milling with the help of CNC or Computer Numerically Operated machines. It is efficient in completing jobs which include drilling, planing, profile contouring, slot and keyway cutting. As these equipment are controlled by computers, it is known to be precise and accurate in cutting, drilling and other such procedures. It includes multi-dimensional work planes that move both the work piece and the cutting head simultaneously.


Some Important Features


The spindle axis in a vertical milling machine is oriented in a vertical position. Spindles are used to hold the cutters and it rotates on the axis of the spindles. It is easy to drill and cut with these equipment as the spindles can be extended according to work requisites. There are basically two types of vertical equipment which include the turret and bed mill.


The turret mill includes a stationary spindle axis. For the process of cutting, the table of the equipment is moved parallel and perpendicular to the axis of the spindle. This equipment has quills with which the cutters can be lowered and raised.


However, in the bed mill the table of the equipment moves only vertical to the axis of the spindle. Large equipment is usually of the bed variety as it is easier to operate than the turret machines. The turret machines are versatile but if the size of the equipment is large, it requires considerable effort and time to use it efficiently.


The drill press is the most common variety of CNC milling machine. The entire drilling process is completed with the help of this equipment as the tool bit remains static in the drill press. The vertical movement of the equipment is essential for the process of drilling. There are semi-operated, fully automated, semi-automated equipment among the Computer Numerically Controlled equipment.


Both the work-piece and the tool on this equipment are driven and controlled by computers. These computers operate on the basis of CAD files which include the programs necessary to move the tools during the operational procedures.


Functional Procedures


The functions of the CNC milling machine begin with a comprehensive drawing which is produced by the one of the CAD programs. This specific drawing includes all necessary details relating to the work-piece. The base of the program requires informative details about the profile and dimension of the work-piece. The program also includes varied information such as machining sequences, different types of tools used, and the speed of the tools, the physical dimension of the work-piece and the start and end points.


As the entire process of machining is controlled by the computer, it requires less human intervention and effort. One of the greatest advantages of these machines includes its incomparable efficiency and accuracy in the process of drilling and machining. It can be used to complete a wide variety of operations which include the template drilling, boring and reaming, face and contour grinding, slot and keyway and so forth.


JIUH-YEH is a professional manufacturer specializes in producing bed type vertical milling machine, knee type milling machine, and various machining centers. If you are interested in vertical milling machine series, please do not hesitate to contact with Jiuh-Yeh for more information!


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Vertical Milling Machine VS Horizontal Milling Machine

Even with all the power and versatility of modern milling machines, no single machine can handle everything – nor should it. Some applications need a machine that’s designed to work on a large number of general pieces, while others may benefit from a more specialized milling machine, which is built to make a specific type of job easier to do. Understanding the basic differences between types of milling machines is important to choose the right type of machine for your needs. One of the major methods for categorizing milling machines is whether they are set up for vertical or horizontal milling machine.


Vertical Milling

On a vertical milling machine, the cutting head, called the spindle, is oriented vertically. Milling can be controlled in different ways, depending on the specific type of machine. The bed mill uses a spindle that can be raised or lowered, combined with a bed that can be moved horizontally. The combination of these sets of movements enables the operator to mill the raw material to different shapes and depths. A turret mill has a spindle in a fixed position, and the bed is moved both vertically and horizontally to bring the material up to the cutting surface and mill it to specifications. A turret mill is often considered to be more versatile than a bed mill, but because of the way turret mills move, they’re impractical except in small sizes. Large, heavy pieces are more difficult for a machine operator to raise and lower, which means large milling machines designed to work on heavy pieces are usually bed mills.


Horizontal Milling

A horizontal milling machine, on the other hand, makes uses of a horizontal arbor to mount the cutting surfaces. The cutters on a horizontal mill are fashioned something like the blade of a circular saw, but they are generally thicker and smaller. Their size and shape means they can generally cut faster than the spindle of a vertical mill, especially when milling slots and grooves. The length of the arbor across the entire width of the bed also means that multiple cutters can sometimes be installed, which allows cutting of multiple grooves at one time. Some horizontal milling machines also have beds that can be rotated to enable milling at multiple angles rather than strictly on a horizontal plane.


Choosing between Vertical and Horizontal

Both types of milling machines have their merits, and the choice of between the two depends entirely on the kind of milling that needs to be done. The number of planes on which a piece needs to be worked, as well as the shape and size of the piece, are major factors in deciding whether the milling is more suited to vertical or horizontal milling. Heavier items and those that need to be worked on multiple sides lend themselves more readily to horizontal milling, while work such as sinking dies is best suited for a vertical milling machine. Many items, however, can be worked on either type of milling machine by using the correct techniques.


Both vertical and horizontal milling machine can make use of CNC (computer numerical controlled) technology to automate milling for fine control, especially on complex milling jobs or when exact repetition is needed. There are also various types of add-on parts and cutting heads that can be used to modify a horizontal mill to do vertical milling, or vice versa. This is a great advantage to a small shop that usually needs one type of mill because it allows a wider range of milling on a single machine, especially for applications that are not often needed.


If you need further details about vertical and horizontal milling machines, welcome to visit our website and feel free to contact Jiuh-Yeh – the outstanding and professional machining center manufacturer in the industry.


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The Truth About a Vertical Milling Machine

There are many milling machines available for sale throughout the world. Most people prefer a vertical milling machine because it cuts high-quality parts and is a reliable tool for many years. Most milling machine manufacturers look to CNC (Computer Numerical Control) to provide professional service and these same manufacturers continue to engineer innovative ideas into their existing systems. Reliable manufacturers of vertical mills watch the market closely to assure that they only provide products that meet the demand of the marketplace.


A vertical milling machine gives its users years of devoted service. It is a world-class machine that is an outstanding value. The best vertical mills have many unique features such as automatic lubricating and cooling systems, safety features built into every travel axis, high precision screws and nuts for complete accuracy, state-of-the-art electrical components, high-quality control systems and variable speeds. They can be depended upon to cut parts that meet every expectation.


Milling, whether vertical or horizontal, involves a process where curved, irregular or flat services are machined on a workpiece. A rotating cutter, which has several cutting edges, is used along with the workpiece to get the desired results. A milling machine is composed of a spindle which is driven by a motor. The spindle is mounted on the milling cutter and revolves it. A worktable mounts the workpiece which is, in turn, fed by the spindle. In addition to being either vertical or horizontal, a milling machine can also be classified as knee-type, bed-type or planer-type. No matter what type is chosen, it will have a self-contained motoring and cooling system, several speeds and table feeds that are power driven.


A vertical milling system is something that is chosen by most manufacturing companies today. It is known for the excellent service it provides and for the fine finished parts and products it produces. It is an excellent investment and often a key factor in a high profit margin that is the primary goal of most manufacturing companies.


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