Manufacturing Science-II (EME-503)

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1 Time: 1 Hour B.Tech. [SEM V (ME-5 All Groups)] QUIZ TEST-1 Manufacturing Science-II ` Max. Marks: 30 Note: Attempt all the questions Q1) How metal is removed in metal cutting? Explain by giving any simple model to explain the metal removal process. (Q.No.-1) [5] Q2) Draw the tool Geometry of a single point cutting tool showing various angles. (Q.No.-7) [5] Q1) Derive the following Merchant s shear angle relationship based on minimum energy principle. Where = Shear angle, α = rake angle, β = friction angle [6] Q2) In a tool wear test with a high speed cutting tool, the following values of tool life are obtained [3+3] Tool life (min) Cutting speed (m/min) Determine the values of n and C of Taylors equation. Q3) In an orthogonal cutting operation of a bar of 32 mm diameter, the following data have been observed: Depth of cut = mm, Length of the chip = 60 mm, Cutting speed = 10 m/min, Rake angle = 35, Cutting force = 200 N, Thrust force = 80 N. Determine: [ ] i) Coefficient of friction ii) Chip thickness ratio iii) Shear plane angle iv) Velocity of chip relative to tool EME-503/Mr. S.D. Sharma, Ms. Vivek Agnihotri Date: 01/ 09/2014

2 Time: 1 Hour B.Tech. [SEM V (ME-5 All Groups)] QUIZ TEST-1 Manufacturing Science-II ` Max. Marks: 30 Note: Attempt all the questions Q1) With the help of a sketch show how tool is designated in ASA system? Describe the tool represented by 10,10,6,6,8,8, 1 mm in ASA system. (Q.No.-4) [3+2] Q2) Explain with the help of a neat sketch the Merchant circle diagram in orthogonal cutting. Q.No.-9) [5] Q1) Derive the following Merchant s shear angle relationship based on minimum energy principle. Where = Shear angle, α = rake angle, β = friction angle [6] Q2) In a tool wear test with a high speed cutting tool, the following values of tool life are obtained [3+3] Tool life (min) Cutting speed (m/min) Determine the values of n and C of Taylors equation. Q3) In an orthogonal cutting operation of a bar of 32 mm diameter, the following data have been observed: Depth of cut = mm, Length of the chip = 60 mm, Cutting speed = 10 m/min, Rake angle = 35, Cutting force = 200 N, Thrust force = 80 N. Determine: [ ] i) Coefficient of friction ii) Chip thickness ratio iii) Shear plane angle iv) Velocity of chip relative to tool EME-503/Mr. S.D. Sharma, Ms. Vivek Agnihotri Date: 01/ 09/2013

3 Time: 1 Hour B.Tech. [SEM V (ME-5 All Groups)] QUIZ TEST-1 Manufacturing Science-II ` Max. Marks: 30 Note: Attempt all the questions Q1) Explain with a neat sketch orthogonal cutting and oblique cutting. Discuss the relevance of orthogonal cutting in study of metal cutting. (Q.No.-5) [4+1] Q2) How Cutting fluids contribute in improving the Tool life? (Q.No.-12) [5] Q1) Derive the following Merchant s shear angle relationship based on minimum energy principle. Where = Shear angle, α = rake angle, β = friction angle [6] Q2) In a tool wear test with a high speed cutting tool, the following values of tool life are obtained [3+3] Tool life (min) Cutting speed (m/min) Determine the values of n and C of Taylors equation. Q3) In an orthogonal cutting operation of a bar of 32 mm diameter, the following data have been observed: Depth of cut = mm, Length of the chip = 60 mm, Cutting speed = 10 m/min, Rake angle = 35, Cutting force = 200 N, Thrust force = 80 N. Determine: [ ] i) Coefficient of friction ii) Chip thickness ratio iii) Shear plane angle iv) Velocity of chip relative to tool EME-503/Mr. S.D. Sharma, Ms. Vivek Agnihotri Date: 01/ 09/2013

4 Time: 1 Hour B.Tech. [SEM V (ME-5 All Groups)] QUIZ TEST-1 Manufacturing Science-II ` Max. Marks: 30 Note: Attempt all the questions Q1) Name the various types of chips. Why discontinuous chips are preferred over continuous type? (Q.No.-2) [2+3] Q2) Discuss various types of tool wear. Enumerate the factors on which the tool wear depends. (Q.No.-14) [3+2] Q1) Derive the following Merchant s shear angle relationship based on minimum energy principle. Where = Shear angle, α = rake angle, β = friction angle [6] Q2) In a tool wear test with a high speed cutting tool, the following values of tool life are obtained [3+3] Tool life (min) Cutting speed (m/min) Determine the values of n and C of Taylors equation. Q3) In an orthogonal cutting operation, the following data have been observed: [ ] Depth of cut = mm, Length of the chip = 60 mm, Cutting speed = 10 m/min, Rake angle = 35, Cutting force = 200 N, Thrust force = 80 N. Determine: i) Coefficient of friction ii) Chip thickness ratio iii) Shear plane angle iv) Velocity of chip relative to tool EME-503/Mr. S.D. Sharma, Ms. Vivek Agnihotri Date: 01/ 09/2013

5 Time: 1 Hour B.Tech. [SEM V (ME-5 All Groups)] QUIZ TEST-1 Manufacturing Science-II ` Max. Marks: 30 Note: Attempt all the questions Q1) Enumerate the conditions that will allow a continuous chip to be formed in machining. (Q.No.-3) [5] Q2) How built-up edge (BUE) are formed? Enumerate the factors that induce formation of built-up edge (BUE). (Q.No.-6) [2+3] Q1) Derive the following Merchant s shear angle relationship based on minimum energy principle. Where = Shear angle, α = rake angle, β = friction angle [6] Q2) In a tool wear test with a high speed cutting tool, the following values of tool life are obtained [3+3] Tool life (min) Cutting speed (m/min) Determine the values of n and C of Taylors equation. Q3) In an orthogonal cutting operation of a bar of 32 mm diameter, the following data have been observed: Depth of cut = mm, Length of the chip = 60 mm, Cutting speed = 10 m/min, Rake angle = 35, Cutting force = 200 N, Thrust force = 80 N. Determine: [ ] i) Coefficient of friction ii) Chip thickness ratio iii) Shear plane angle iv) Velocity of chip relative to tool EME-503/Mr. S.D. Sharma, Ms. Vivek Agnihotri Date: 01/ 09/2013

6 B.Tech. [SEM V (ME- V- All Groups)] QUIZ TEST-2 Q1. Discuss with the help of neat sketches the five operations that can be performed on Engine Lathe. [Q-2] [5x1] Q2. Explain the characteristics that distinguish milling process from other machining processes. [Q-10] [5] Q1. What is the use of the following in a Centre lathe:- [6X1] i) Lead screw ii) Tool post iii) Tail stock iv) Half nut v) Compound slide vi) Threading Dial Q2. Classify different type of milling machines. Explain the construction of column and knee type Horizontal Milling Machine with neat schematic diagram. [2+6] Q3. Discuss briefly Twist Drill nomenclature with neat sketch. [6] Date- 07/10/2014

7 B.Tech. [SEM V (ME- V- All Groups)] QUIZ TEST-2 Q1. What do you understand by Tool Lay Out in context of Capstan / Turret Lathes? Explain. [Q-5] [5] Q2. Explain with a neat sketch Up and Down Milling? Name the different types of Milling Machines. [Q-9] [4+1] Q1. What is the use of the following in a Centre lathe:- [6X1] i) Lead screw ii) Tool post iii) Tail stock iv) Half nut v) Compound slide vi) Threading Dial Q2. Classify different type of milling machines. Explain the construction of column and knee type Horizontal Milling Machine with neat schematic diagram. [2+6] Q3. Discuss briefly Twist Drill nomenclature with neat sketch. [6] Date- 07/10/2014

8 B.Tech. [SEM V (ME-V- All Groups)] QUIZ TEST-2 Q1. Briefly explain with suitable diagram the following operations: [Q-10] [4X1] i) Boring ii) Threading iii) Forming vi) Reaming Q2. Compare Shaping, Planning and Slotting machines with respect to relative tool and work motions. [Q-7] [6] Q1. What is the use of the following in a Centre lathe: - [6X1] i) Lead screw ii) Tool post iii) Tail stock iv) Half nut v) Compound slide vi) Threading Dial Q2. Classify different type of milling machines. Explain the construction of column and knee type Horizontal Milling Machine with neat schematic diagram. [2+6] Q3. Discuss briefly Twist Drill nomenclature with neat sketch. [6] Date- 07/10/2014

9 B.Tech. [SEM V (ME- V- All Groups)] QUIZ TEST-2 Q1. Explain the construction of a dividing head giving the applications for which it can be used. [Q-11] [5] Q2. What are the various methods available for generating flat surfaces with machine tools? [Q-1] [5] Q1. What is the use of the following in a Centre lathe:- [6X1] i) Lead screw ii) Tool post iii) Tail stock iv) Half nut v) Compound slide vi) Threading Dial Q2. Classify different type of milling machines. Explain the construction of column and knee type Horizontal Milling Machine with neat schematic diagram. [2+6] Q3. Discuss briefly Twist Drill nomenclature with neat sketch. [6] Date- 07/10/2014

10 B.Tech. [SEM V (ME- V- All Groups)] QUIZ TEST-2 Q1. Describe with neat sketches the principal features of any three hole making operations you are familiar with along with the tools used. [Q-12] [5] Q2. Giving a suitable sketch describe the Quick Return Mechanism used in a mechanical shaper. [Q-8] [5] Q1. What is the use of the following in a Centre lathe:- [6X1] i) Lead screw ii) Tool post iii) Tail stock iv) Half nut v) Compound slide vi) Threading Dial Q2. Classify different type of milling machines. Explain the construction of column and knee type Horizontal Milling Machine with neat schematic diagram. [2+6] Q3. Discuss briefly Twist Drill nomenclature with neat sketch. [6] Date- 07/10/2014

11 B.Tech. [SEM V (ME- 5 All Groups)] QUIZ TEST-3 Q1. What do you understand by Truing in context with the grinding wheel? Explain with a suitable sketch. [Q-2] [5] Q2. What are various elements of surface roughness? How are they measured? [Q-10] [5] Q1. What are the main differences between cylindrical and centreless grinding. [6] Q2. Discuss the wear mechanism of grinding wheels. [6] Q3. Show that the chip length, l s, in horizontal surface grinding, using grinding wheel of diameter D, is given by: l s = ( ) Where V w is the wheel speed, v is the work speed and d is the infeed [8] Date- 10/11/2014

12 B.Tech. [SEM V (ME- 5 All Groups)] QUIZ TEST-3 Q1. Enlist and explain the factors used to specify grinding wheels. Give an example of specifying a grinding wheel. [Q-5] [4+1] Q2. Define flaw, roughness and waviness to characterize surfaces. Show surface profile for a rough, lapped and finished object. [Q-9] [4+1] Q1. What are the main differences between cylindrical and centreless grinding. [6] Q2. Discuss the wear mechanism of grinding wheels. [6] Q3. Show that the chip length, l s, in horizontal surface grinding, using grinding wheel of diameter D, is given by: l s = ( ) Where V w is the wheel speed, v is the work speed and d is the infeed [8] Date- 10/11/2014

13 B.Tech. [SEM V (ME-V- All Groups)] QUIZ TEST-3 Q1. What is the difference between Honing and Lapping operations? [Q-7] [5] Q2. What is Fit? Explain different types of fits with suitable sketches. [Q-13] [5] Q1. What are the main differences between cylindrical and centreless grinding. [6] Q2. Discuss the wear mechanism of grinding wheels. [6] Q3. Show that the chip length, l s, in horizontal surface grinding, using grinding wheel of diameter D, is given by: l s = ( ) Where V w is the wheel speed, v is the work speed and d is the infeed [8] Date- 10/11/2014

14 B.Tech. [SEM V (ME- 5 All Groups)] QUIZ TEST-3 Q1. Name various grinding processes? With the help of a neat sketch explain Centreless Grinding process. [Q-1] [1+4] Q2. Clearly differentiate between Grade and Structure of grinding wheel. [Q-6] [5] Q1. What are the main differences between cylindrical and centreless grinding. [6] Q2. Discuss the wear mechanism of grinding wheels. [6] Q3. Show that the chip length, l s, in horizontal surface grinding, using grinding wheel of diameter D, is given by: l s = ( ) Where V w is the wheel speed, v is the work speed and d is the infeed [8] Date- 10/11/2014

15 B.Tech. [SEM V (ME- 5 All Groups)] QUIZ TEST-3 Q1. What are the parameters that control the grinding process? Explain their effect on grinding process. [Q-4] [5] Q2. What is the significance of dimensional tolerance control during various machining operations? [Q-12] [5] Q1. What are the main differences between cylindrical and centreless grinding. [6] Q2. Discuss the wear mechanism of grinding wheels. [6] Q3. Show that the chip length, l s, in horizontal surface grinding, using grinding wheel of diameter D, is given by: l s = ( ) Where V w is the wheel speed, v is the work speed and d is the infeed [8] Date- 10/11/2014

Roll No. :.. Invigilator s Signature :.. CS/B.Tech (ME)/SEM-5/ME-504/ TECHNOLOGY OF MACHINING. Time Allotted : 3 Hours Full Marks : 70

Name : Roll No. :.. Invigilator s Signature :.. CS/B.Tech (ME)/SEM-5/ME-504/2009-10 2009 TECHNOLOGY OF MACHINING Time Allotted : 3 Hours Full Marks : 70 The figures in the margin indicate full marks. Candidates