MANUFACTURING TECHNOLOGY-II
1.
Give two examples for orthogonal cutting.
2.
What are the four important characteristics of materials used for cutting tools?
3.
Why is it essential that the cutting point of the tool should be level with the spindle centre
while machining taper on a work-piece?
4.
What is the difference between a ram-type turret lathe and saddle type turret lathe?
5.
Under what conditions planning operation would be preferred over other machining processes
like milling, broaching, shaping, etc?
6.
What are the common work holding devices used on milling machines?
7.
What for lapping is used?
8.
State the abrasives used in the manufacture of grinding wheels.
9.
What is the difference between incremental and absolute system?
10.
What is the role of computer for NC machine tool?
PART-B
Explain the conditions that the promote formation of the following types of chip:
(i) Continuous chips without Builtup edge.
(ii) Continuous chips with Builtup edge.
(iii) Discontinuous chips.
Define the various tool parts of a single point cutting tool with a neat sketch.
What are the standard angles of cutting tool? Illustrate with an example.
Describe some of the methods and equipments for holding work on a lathe.
Explain any four commonly used attachments on lathe.
Briefly explain the principle of working of the sliding head type single spindle automatic
machine.
Describe with a neat sketch a turret automatic screw machine.
State the advantages of Ward-Leonard drive.
Explain with a sketch "Fast and Loose pulleys" quick return mechanism of a planer table.
State the methods of holding milling cutters.
Explain Simple indexing, Compound indexing and differential indexing with suitable example.
State the advantages and limitations of broaching.
Compare gear hobbing with gear shaping.
Explain self-sharpening characteristics of grinding wheel.
Describe the use of cutting fluids in grinding.
Explain wheel truing and dressing.
State a few typical applications where the use of numerical control would be justified.
Describe in brief the basic components of a tape-operated NC machine tool. (8)
Discuss the advantages of computer numerical control system. (8)
What is the difference between positioning machines and contouring machines? (8)
MANUFACTURING TECHNOLOGY-II
1.
What is orthogonal cutting?
2.
What are the functions of cutting fluids?
3.
Calculate the power required for cutting a steel rod of 50 mm in diameter at 200 rpm. Assume
cutting force of 160 kg.
4.
What are advantages of automatic lathes?
5.
Compare hydraulic shaper with mechanical shaper?
6.
What is meant by up-milling and down-milling?
7.
What are the types of surfaces that could be produced using plain cylindrical grinders?
8.
What are the advantages of honing process?
9.
What is point-to-point (PTP) system?
10.
What are G-codes and M-codes? Give examples.
Discuss about the following with neat sketch and with suitable example.
(i) Closed loop system. (4)
(ii) Open loop system. (4)
(iii) Straight line system. (4)
(iv) Continuous system. (4)
Describe with neat sketch various steps in computer assisted part programming.
Explain APT geometry and motion statements.
Explain the types of chip formed during machining process.
Using Merchant's circle diagrams derive the expression for estimating the cutting force during
machining. Mention the assumptions made.
What is tool life?
Describe the forms of wears on the cutting tool with neat sketches.
Calculate the time taken for one complete cut on a work piece of 500 mm long and 50 mm
diameter. The cutting speed is 30 m/min and the feed rate is 0.5 mm/rev.
Describe the working principle of multi-spindle automatics. Give its advantages and application.
Explain the construction and working principle of a lathe with sketch.
With neat sketch describe the construction and working of a slotter.
List the difference between shaper and planner.
Sketch and explain the working principle of upright drilling machine.
Write short notes on expanding hand reamers and adjustable machine reamers.
Explain the barrel finishing process with neat diagram.
Explain the abrasive jet grinding with diagram.
Explain the construction and working principle of continuous broaching machine.
With neat diagram explain the gear hobbing process.
MANUFACTURING TECHNOLOGY-II
1. List out the difference between orthogonal cutting and oblique cutting.
2. Write short notes on flank wear and crater wear of a single point cutting tool?
3. State the need for tumbler gear mechanism.
4. Differentiate capstan and turret lathe.
5. Mention the difference between shaper and planer.
6. List out the situation where reaming operation is required.
7. Compare and contrast the gear generation process with gear forming process.
8. A grinding wheel is specified as A 24 K 7 V. What does each letter indicates?
9. Differentiate between fixed zero and floating zero in CNC terminology.
10. Write short notes on point to point interpolation system.
The life of a turning tool obtained was 40 minutes and 25 minutes at cutting speed 80 m/min and
100 m/min respectively. Determine the tool life at 40 m/min and 120 m/min.
State the functions of cutting fluids and their types.
Draw the merchant's circle and derive the relationship between various cutting forces.
Discuss any four work holding device applicable in lathe.
Explain turret indexing mechanism and bar feeding mechanism applied in automatic lathe?
Describe with a neat sketch, the quick return mechanism of a shaper.
Explain the various drill holding devices.
Differentiate the up milling from down milling process.
Discuss about index milling, screw thread milling and end milling operation.
Discuss the three types of feed in centreless grinding machine.
Explain about the glazing and dressing of a grinding wheel.
Explain the principle of broaching operation with neat sketch.
Draw and explain the broach tool.
Discuss the importance of slant bed CNC lathe?
Write short notes on Tool magazine, Automatic tool changer and Palette.
Explain the APT system configuration with a neat block diagram.
Write the part program for the work piece shown in figure.
Material: Aluminum
Workpiece Size: 100 mm x 80 mm x 15 mm
MANUFACTURING TECHNOLOGY-II
1. List the essential characteristics of a cutting fluid.
2. Name the various cutting tool materials.
3. What is the purpose of a mandrel? How many types of mandrels is there in common use?
4. What are the advantages of using a collect chuck?
5. State the differences between a vertical shaper and a slotter.
6. Write the differences between drilling and tapping.
7. What is the need of truing and dressing operations in a grinding wheel?
8. List the advantages of honing.
9. Name the various elements of CNC machines.
10. What are the classifications of NC machines?
What is orthogonal rake system? Show the ORS of tool analysis with the help of a sketch.
What is the use of a chip breaker? Discuss the various types of chips produced during metal
machining process. Explain with neat sketches the various methods of turning a taper.
Write down the differences between a capstan and a turret lathe.
Explain with a neat sketch the working of a Swiss type automatic lathe.
Explain the hydraulic drive of a horizontal shaper with neat sketches.
Sketch a twist drill. Write down its main parts (i) and their functions.
Write short notes on reaming and boring operations.
Explain with neat sketches the following operations: Honing, Lapping, Superfinishing and
buffering.
With the help of a neat sketch, discuss the working of continuous surface broaching machine and
write its advantages and limitations.
Define CNC and DNC. With a help of a diagram explain the working of NC machine tool.
How is manual programming of a NC machine done?
Write short notes on APT language.
MANUFACTURING TECHNOLOGY-II
1. What is meant by superfinishing?
2. What are the backing materials used in coated abrasives?
3. What is the difference between drill socket and sleeve?
4. How does face milling cutter differ basically from peripheral milling cutter?
What is Centreless grinding? Describe centreless operations.
Enumerate with neat sketch honing process.
Describe with neat sketches various types of surface grinders.
The performance of a grinding wheel depends upon types of abrasive, grain size, grade and
structure. Discuss the effect of each.
List out various operations that can be performed on a lathe.
Explain any four operations with neat sketches.
Sketch and explain various parts of a radial drilling machine.
Describe various indexing methods used in milling machine.
MANUFACTURING TECHNOLOGY-II
1. How lathes are specified?
2. What are the requirements for tool material?
3. A shaft of 25 mm diameter is turned at a cutting speed of 50 m/mt. Find the rpm of the
shaft.
4. What is draw cut shaper?
5. What is the significance of grit in a grinding wheel?
6. What is glazing? How will you rectify this?
7. What do you meant by progressive broaching?
8. What are the importance of chip breakers in machining process?
9. List the factors which will affect the life of tool.
10. Differentiate between orthogonal and oblique cutting process.
Explain the types of chips produced in cutting processes.
Explain the different types of forces acting on a cutting process
During orthogonal cutting process, a chip length of 75 mm was obtained with an uncut chip
length of 195 mm and the rake angle used was 20° with depth of cut 0.45 mm. Calculate the
shear plane angle and chip thickness.
What are the advantages of automats as compared to engine lathes?
Explain the mechanisms used for headstock driving arrangement in a lathe.
Explain the difference between turret and engine lathe.
State and explain any four types of work holding devices for rotating work pieces.
Explain the following milling operations with sketches: (i) Straddle Milling, (ii) Gang Milling,
(iii) Form Milling, (iv) End Milling.
Draw sketch of a crank shaper, mark the important parts and explain their functions. Explain
how quick return mechanism works.
What are the operations that can be done on drilling machines? Explain them with simple
sketches.
Explain with a neat sketch of a continuous broaching machine.
Explain the factors considered in selecting a grinding wheel and also explain the standard
specification system used for grinding wheels.
Distinguish between lapping and honing.
Explain the principle of working of centreless grinding machine.
What are 'Through Feed', 'In Feed', and 'End Feed' in centreless grinding operations?
Explain the working principle of gear hobbing operation.
Enumerate the generation of straight bevel gears with sketches.
Explain the structure of cam controlled, automats.
Describe the working principle of Swiss type automats with suitable sketches.