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This information was originally compiled by the US Army. Presented to you free by American Machine Tools Company. Milling is the process of machining flat, curved, or irregular surfaces by feeding the workpiece against a rotating cutter containing a number of cutting edges.
The usual Mill consists basically of a motor driven spindle, which mounts and Milling machine the milling cutter, and a reciprocating adjustable worktable, which mounts and feeds the workpiece. Milling machines are basically classified as vertical or horizontal.
These machines are also classified as knee-type, ram-type, manufacturing or bed type, and planer-type. The knee is a massive casting that rides vertically on the milling machine column and can be clamped rigidly to the column in a position where the milling head and milling machine spindle are properly adjusted vertically for operation.
The plain vertical machines are characterized by a spindle located vertically, parallel to the column face, and mounted in a sliding head that can be fed up and down by hand or power. Modern vertical milling machines are designed so the entire head can also swivel to permit working on angular surfaces.
An adjustable overhead arm containing one or more arbor supports projects forward from the top of the column. The arm and arbor supports are used to stabilize long arbors. Supports can be moved along the overhead arm to support the arbor where support is desired depending on the position of the milling cutter or cutters.
A heavy, vertical Milling machine screw beneath past the milling cutter. The milling machine is excellent for forming flat surfaces, cutting dovetails and keyways, forming and fluting milling cutters and reamers, cutting gears, and so forth. Many special operations can be performed with the attachments available for milling machine use.
The saddle rests upon the knee and supports the worktable. The saddle moves in and out on a dovetail to control cross feed of the worktable. The worktable traverses to the right or left upon the saddle for feeding the workpiece past the milling cutter. The table may be manually controlled or power fed.
The universal machine can be fitted with various attachments such as the indexing fixture, rotary table, slotting and rack cutting attachments, and various special fixtures.
Two popular ram-type milling machines are the universal milling machine and the swivel cutter head ram-type milling machine. The cutter head can be swiveled from a vertical spindle position to a horizontal spindle position or can be fixed at any desired angular position between vertical and horizontal.
Basic milling machine configurations are shown in Figure These are in addition to those safety precautions described in Chapter 1. Do not make contact with the revolving cutter. Place a wooden pad or suitable cover over the table surface to protect it from possible damage. Use the buddy system when moving heavy attachments.
Do not attempt to tighten arbor nuts using machine power. When installing or removing milling cutters, always hold them with a rag to prevent cutting your hands. While setting up work, install the cutter last to avoid being cut.
Never adjust the workpiece or work mounting devices when the machine is operating. Chips should be removed from the workpiece with an appropriate rake and a brush.
Shut the machine off before making any adjustments or measurements. When using cutting oil, prevent splashing by using appropriate splash guards. You should know the names of the most common classifications of cutters, their uses, and, in a general way, the sizes best suited to the work at hand.
Milling Cutter Nomenclature Figure shows two views of a common milling cutter with its parts and angles identified. These parts and angles in some form are common to all cutter types. The pitch refers to the angular distance between like or adjacent teeth.
The pitch is determined by the number of teeth. The tooth face is the forward facing surface of the tooth that forms the cutting edge.
The cutting edge is the angle on each tooth that performs the cutting. The land is the narrow surface behind the cutting edge on each tooth. The rake angle is the angle formed between the face of the tooth and the centerline of the cutter. The rake angle defines the cutting edge and provides a path for chips that are cut from the workpiece.
The primary clearance angle is the angle of the land of each tooth measured from a line tangent to the centerline of the cutter at the cutting edge.Machine tooling for lathes and milling machines.
Free plans and how to information. About. C & C Machine, Inc., established in in our father's garage, has grown into a CNC machining complex. From simple parts to very complex, prototype to .
Milling Machines. Please select a sub category from below: Manual Mills; protoTRAK Mills; Milling Machine Tools. When it comes to milling machines for sale King Rich is Standaco Machinery’s choice in range, quality and price, whether it’s a manual turret mill or bed mill all the way through to CNC milling .
Moved Permanently. The document has moved here. Enter your email here to sign up for yunusemremert.com emails and specials. As material passes through the cutting area of a milling machine, the blades of the cutter take swarfs of material at regular intervals.
Surfaces cut by the side of the cutter (as in peripheral milling) therefore always contain regular ridges.