Basic Of Milling Machine | Interview Question and answers

Milling Machine : Basic milling machine interview questions and answers . Viva , objective , oral examination questions for Mechanical Students .

MILLING MACHINE QUESTION AND ANSWERS

1. What are the specifications of milling machine?.

The table length and width, Maximum longitudinal cross and vertical travel of the table, number of spindle speeds and feeds, Power of driving motor, Floor space and net weight.

2. Classify milling machine.

1. Column and knees type –
a. plain milling machine,
b.Vertical milling machine,
c. Universal milling machine,
d. Ram- type milling machine,
e. Omniversal milling machine.

2. Bed-Type milling machine –
a. simplex milling machine
b. duplex milling machine
c. Triplex milling machine.

3. Plano-type milling machine.

4. Special purpose milling machine –
a. Rotary table milling machine
b. Drum milling machine
c. Profile milling machine.

3. List the principle parts of horizontal or plain milling machine.

Base, column, knee, saddle, table, overarm and arbor.

4. How omniversal milling machine differs from universal milling machine?.

This is a modified form of a plain milling machine. It is provided with two spindles, one of which is in the horizontal plane while the other is carried by a universal swiveling head.

5. Classify bed type milling machine.

Simplex, duplex and triplex machine.

6. What are the various types of special purpose milling machines?.

Rotary table or continuous milling machine, Drum type milling machine Profile or contour milling machine.

7. List the various types of milling attachments.

Vertical milling attachment, universal milling attachment, High speed milling attachment, Rotary attachment, slotting attachment, Rack milling attachment, Universal spiral milling machine.

8. What are the advantages of up milling process?

It does not require a backlash eliminator. Safer operation due to separating forces between cutter and work.

9. Write any ten nomenclature of plain milling processes.

Body of cutter, cutting edge, face fillet, Gash, Lead, Land, Outside diameter, Root diameter, Cutter Angles.

10. Classify peripheral milling processes.

Up milling or conventional milling, Down milling or climb milling.

11. What are the advantages of down milling process?

Cutter with higher rake angles can be used. This reduces power requirements. Cutter wear is less because chip thickness is maximum at the start of the cut.

12. Define “face milling”.

Face milling is the operation performed by a milling cutter to produce flat machined surfaces perpendicular to the axis of rotation.

13. What is meant by plain or slab milling.

Plain or slab milling is the operation of producing flat horizontal surface parallel to the axis of the cutter using a plain or slab milling cutter.

14. List out various milling operations.

Plain milling, Face milling, Angular milling, Straddle milling, Gang milling, Form milling, End milling, T-slot milling, Gear cutting.

15. Define Straddle and Gang milling.

Straddle milling operation is the production of two vertical flat surfaces on the both sides of the job by using two side milling cutters which are separated by collars. Gang milling is the production of many surfaces of a job simultaneously by feeding the table against a number of required cutters.

16. What is meant by term indexing?

Indexing is the process of dividing the periphery of a job in to equal number of divisions.

17. What are the three types of dividing heads?.

Plain or simple dividing head, Universal dividing head, Optical dividing head.

18. What is cam milling?

Cam milling is the operation of producing cams in a milling machine by the use of a universal dividing head and a vertical milling attachment.

19. What are the specifications of milling machine?.

The table length and width, Maximum longitudinal cross and vertical travel of the table, number of spindle speeds and feeds, Power of driving motor, Floor space and net weight.