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Metal Machining: Theory of Milling

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Questions and Answers

In a plain milling machine, what movement is not possible in a horizontal plane?

Cross

Vertical

Longitudinal

Swivel (correct)

What distinguishes a universal milling machine from a plain milling machine?

High-speed spindle rotation

Ability to perform angular and helical milling operations (correct)

Fixed table orientation

Limited feeding directions

What type of milling machine has the cutter spindle positioned vertically?

Drum type milling machine

Horizontal bed milling machine

Universal vertical milling machine (correct)

Turret ram type milling machine

What distinguishes a peripheral milling operation from a face milling operation?

In peripheral milling, the cutting edges are on the outside periphery of the cutter, while in face milling, they are on the end and outside periphery. Signup and view all the answers

What is the main function of an arbor in milling operations?

To mount and key cutters that have a bore at the center in milling machines. Signup and view all the answers

What is a defining feature of a universal milling machine compared to other types of milling machines?

It has a knee that can be adjusted up and down for vertical alignment of the spindle. Signup and view all the answers

What is the formula to convert spindle rotation speed to spindle velocity in milling?

V = 7.1πD Signup and view all the answers

How is the feed rate in milling calculated when given the feed per cutter tooth?

fr = NtNf Signup and view all the answers

What is the formula to determine the material removal rate in a slab-milling operation?

RMR = wdf𝑟 Signup and view all the answers

How is the approach distance calculated to fully engage the cutter in a slab cutting operation?

A = d(D-d) Signup and view all the answers