MANUFACTURING TECHNOLOGY

UNIT-I

THEORY OF METAL CUTTING

PART-A

1. What is tool signature.

2. What is side rake angle? And mention its effects?

3. What is clearance angle? And mention its types?

4. Explain the nose radius .

5. Sketch the orthogonal cutting.

6. What is shear plane?

7. What is cutting force?

8. What is chip and mention its different types?

9. Define machinability of metal.

10. Write Taylor‟s tool life equation

PART-B

1. Explain orthogonal cutting and oblique cutting with its neat sketches and compare.

2. What is the tool life equation and state the factor affecting the tool life.

3. What is machinability? And explain.

4. Explain the various tool materials.

5. Write short notes on surface finish.

6. What are the different type of cutting fluids used i n machining process

7. Write short notes tool wear.

UNIT-II

CENTRE LATHE & SPECIAL PURPOSE LATHES

PART-A

1. What is swing diameter?

2. Write the specification of a typical lathe.

3. Write down the names of any four lathe accessories.

4. What is the application of air operated chuck?

5. Define the term „Concity”.

6. Write down the formula for calculating taper turning angle by compound rest method.

7. Define the term „Thread catching‟.

8. Define automatic machine .

9. State the principal of multi spindle automats.

10. Classify multi spindle automats.

PART-B

1. Sketch a center lathe and mention various parts. .

2. List various type of feed mechanisms and explain briefly about tumbler gear reversing mechanism with a sketch.

3. Explain taper turning operation i n a lathe by a taper turning attachment . Discuss its advantages.

4. Explain the following methods of taper turning i n a lathe .

5. (i) By swiveling the compound rest. (8)

(ii) By a taper turning attachment. (8)

6. Explain the Working principle of capstan and turret lathes.

7. Explain the tooling layout for the production of a Hexagonal bolt in a capstan lathe..

8. Discuss the tooling layout for the production of a Hexagonal nut in Turret lathe..

9. Classify transfer machines. Sketch and explain the working of Swiss type automatic screw machine.What is the advantages of automatic machines.

10. Describe a typical single spindle automatic chucking machine .

11. Describe a typical single spindle automatic bar machine

12. Differentiate between parallel action and progressive action multi -spindle automatics.

UNIT-III

OTHER MACHINE TOOLS

PART-A

1. Write down any four operations performed by a shaper.

2. Define feed and depth of cut.

3. What is the function of clapper block in a planner?

4. What are the differences between up milling and down milling .

5. Define “Face milling “.

6. Write down the rule for gear ratio in differential indexing .

7. How do you specify radial drilling machine.

8. Write down any four operations performed by a drilling machine.

9. What is meant by “Sensitive hand feed”?

10. Calculate the tap drill size to cut an internal thread for bolt of outside diameter 10mm,pitch 1.5mm and depth of the thread 0.61 pitch ?

PART-B

1. With a simple sketch, explain the working of the crank and slotted link quick return motion mechanism used in shaper.

2. Write down any four differences between shaper and planer. .

3. Explain the Working principle of planer with a neat sketch.

4. How do you specify a planer.

5. Describe the working mechanism of a universal dividing head, with neat diagram.

6. With a neat sketch, indicate the various parts of an arbor assembly.

7. With a simple sketch, explain the principal parts and angles of a plain milling cutter .Explain them .

8. Explain the twist drill nomenclature and define various elements of twist drill.

9. With a simple sketch, explain the working of a vertical boring machine.

10. Explain the counter boring and counter ringing operation.

11. Explain the Working principle of a Jig boring machine with a neat sketch.

UNIT-IV

ABRASIVE PROCESSES & GEAR CUTTING

PART-A

1. What is the process of self sharpening of the grinding wheel

2. What are the four moments i n a cylindrical centre type grinding.

3. What is meant by centerless grinding.

4. Define the terms abrasive grains.

5. What is mea nt by grit or grains si ze.

6. Define the term grade used i n grinding wheel.

7. what is open and dense structure

8. What is meant by dressing and truing

9. What is meant by honing

10. What is super fi nishing.

PART-B

1. What are the various methods of centerless grinding and each briefly?

2. Explain the external cylindrical grinding process and surface grinding process.

3. Explain the vitrified and resinoid bonding process.

4. E xplain the operations of horizontal broaching machine with neat sketch.

5. Explain the gear cutting by a formed tool.

6. Differentiate between gear forming and generating

7. Explain the principle of operation of gearing hobbing operation what are the advantages of gear hobbing.

8. Give advantages and limitations of gear hobbing.

U

NIT-V

CNC MACHINE TOOLS & PART PROGRAMMING

PART-A

1. State the advantages of NC machines.

2. Draw the simple configuration of CNC machine

3. Mention the main different between C NC and DNC

4. What is the function of servo valve.

5. Define absolute and incremental programming.

6. What are the important steps to be followed while preparing part programming.

7. What is meant by MACRO

8. Define subroutine

9. What do mean by canned cycle

10. What is meant by APT programme

PART-B

1. List the various drive systems explain the principle of any two rive system.

2. Explain open loop and closed loop system

3. What is machining centers explain i n detail

4. Explain various types of CMM

5. Explain the part programming procedure with a good example

6. List and explain G and M code for turning milling operations

7. Explain NC axis conventions.

              7          State the various parts mounted on the carriage.                      BTL-2   Understanding                                PO1,PO5

              8          What are the functions of feed rod and lead screw?                  BTL-1    Remembering                                  PO1,PO5

              9          What is an apron?                                                                         BTL-1    Remembering       PO1,PO3

             10         Mention different types of chucks used in a machine shop.     BTL-2   Understanding                                        PO1,PO2

             11         What is the application of air operated chuck?                         BTL-1    Remembering                              PO1,PO2

             12         What are the advantages of a collet chuck?                               BTL-1    Remembering                           PO1,PO4

             13         What is the purpose of mandrel and its types?                          BTL-1    Remembering                              PO1,PO5

14 Calculate the time required for one complete cut on a piece BTL-5 Evaluating PO1,PO2, of work having 250mm long and 40mm diameter. The PO3 cutting speed is 32 m/min and the feed is 0.4 mm/sec

             15         Define tool room lathe.                                                                 BTL-1    Remembering          PO1,PO2

             16         What are the advantages of semi-automatic lathe?                   BTL-1    Remembering                                  PO1,PO5

             17         Define automatic machine?                                                          BTL-1    Remembering              PO1,PO5

             18         What is the purpose of tumbler gear mechanism of a lathe?   BTL-1    Remembering                                         PO1,PO9

             19         What is thread cutting operation?                                              BTL-1    Remembering                    PO1,PO9

             20         List the various thread cutting methods.                                    BTL-2   Understanding                        PO1,PO5

             21         What is a Centre guage that is used in threading?                    BTL-1    Remembering                                 PO1,PO9

             22         Mention any two limitations of a Centre lathe                          BTL-2   Understanding                             PO1,PO5

23            Compare the advantages of turret lathe over capstan lathe. BTL-2   Understanding   PO2,PO3 24        What is the difference between a ram-type turret lathe and           BTL-1   Remembering PO2,PO3

saddle type turret lathe?

             25         State the different methods of turning taper.                            BTL-4       Analyzing                                PO2,PO3

1 What are the specifications of milling machines?                                            BTL-1    Remembering                                PO1,PO2

2          Mention the various movements of universal milling               BTL-2     Understanding   PO1,PO3 machines.

              3            What are the different ways for machining work pieces in   BTL-1    Remembering                                       PO1,PO3,PO4

Plano milling?

              4         List the various types of milling attachments.                           BTL-1    Remembering                         PO1,PO2,PO4

             26         What are programmed automatic lathes?                                  BTL-1    Remembering                          PO2,PO5

             27         State the advantages of swiss type screw cutting machine        BTL-1    Remembering                                       PO2,PO5

             28        What are the advantages of single spindle automatic lathe?    BTL-1    Remembering                                         PO3,PO5

29             What is Swiss type automat?        BTL-1   Remembering   PO4,PO5 30        What is bar stop?             BTL-1   Remembering   PO3,PO5