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Consider the following statements regarding milling machine: 1. In the vertical milling machine, it Is possible to machine dovetail recesses. 2. In universal milling machine, the worktable can be swivelled. 3. In rotary milling machine, motion imparted to work is rotary. 4. Planer milling machine is provided with several horizontal and vertical heads. Which of the above statements are correct?

Consider the following statements regarding milling machine: 1. In the vertical milling machine, it Is possible to machine dovetail recesses. 2. In universal milling machine, the worktable can be swivelled. 3. In rotary milling machine, motion imparted to work is rotary. 4. Planer milling machine is provided with several horizontal and vertical heads. Which of the above statements are correct? Correct Answer 2, 3 and 4

In peripheral milling, also called plain milling, the axis of the tool is

 parallel to the surface being machined, and the operation is performed by cutting edges

 on the outside periphery of the cutter.

Several types of peripheral milling are discuss below:-

(a) Slab milling:-  The basic form of peripheral milling in which the cutter

 width extends beyond the workpiece on both sides;

(b) Slotting (Slot milling):- In which the width of the cutter is less than the workpiece width, creating a slot in the work—when the cutter is very thin, this operation can be used to mill narrow slots or cut a

 workpart in two, called saw milling.

(c) Side milling:- In which the cutter machines the side of the workpiece.

(d) Straddle milling:- The same as side milling, only cutting takes place on both sides of the work.

(e) Form milling:- In which the milling teeth have a special profile that determines the shape of the slot that is cut in the work. Form milling is therefore classified as a forming operation.

A horizontal milling machine has a horizontal spindle, and this design is well suited for performing peripheral milling (e.g., slab milling, slotting, side and straddle milling) on workparts that are roughly cube shaped.

A vertical milling machine has a vertical spindle, and this orientation is appropriate for face milling, end milling, surface contouring, and die sinking on relatively flat workparts. Dovetail recesses cannot be machined.

An universal milling machine has a table that can be swiveled in a horizontal plane (about a vertical axis) to any specified angle (mainly ±45°). This facilitates the cutting of angular shapes and helixes on workparts.

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