Question 3. State whether or not the following statements are true, explaining your reasons:3.a. For the same shear angle, there are two rake angles that give the same cutting ratio,3.b. For the same depth of cut and rake angle, the type of cutting fluid used has no influence onchip thickness,3.c. If the cutting speed, shear angle, and rake angle are known, the chip velocity can becalculated,3.d. The chip becomes thinner as the rake angle increases,3.e. The function of a chip breaker is to decrease the curvature of the chip.

(a) The given statement is true . To exhibit that for a comparative shear point, there are two rake…

Question 3. State whether or not the following statements are true, explaining your reaso 3.a. For the same shear angle, there are two rake angles that give the same cutting ratio, 3.b. For the same depth of cut and rake angle, the type of cutting fluid used has no influe chip thickness, 3.c. If the cutting speed, shear angle, and rake angle are known, the chip velocity can be calculated,

Question 3. State whether or not the following statements are true, explaining your reaso 3.a. For the same shear angle, there are two rake angles that give the same cutting ratio, 3.b. For the same depth of cut and rake angle, the type of cutting fluid used has no influe chip thickness, 3.c. If the cutting speed, shear angle, and rake angle are known, the chip velocity can be calculated,

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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21.47 State whether or not the following statements are true, explaining your reasons: (a) For the same shear angle, there are two rake angles that give the same cutting ratio, (b) For the same depth of cut and rake angle, the type of cutting fluid used has no influence on chip thickness, (c) If the cut ting speed, shear angle, and rake angle are known, the chip velocity can be calculated, (d) The chip becomes thinner as the rake angle increases, (e) The function of a chip breaker is to decrease the curvature of the chip.
Which option about chief elements in metal cutting is wrong? a)Chip width is the distance between D and d along the cutting surface b)The cutting speed is expressed in mm per revolution c)Feed s is the tool distance moved along the axis per revolution of the work d)Depth of cut t is the distance between D and d
21.56 Assume that, in orthogonal cutting, the rake angle,α , is 20° and the friction angle, β , is 35° at the chip–tool interface. Determine the percentage change in chip thickness when the friction angle is 45°. [Note: do not use Eq. (21.4) or Eq. (21.5).]
21.21 Explain why studying the types of chips produced is important in understanding cutting operations.
Assume that, in orthogonal cutting, the rake angle, oz,is 20° and the friction angle, B, is 35° at the chip-tool interface.Determine the percentage change in chip thickness when the friction angle is 50°. (Note: do not use Eq. (21.3)
21.28 What are the effects of performing a cutting operation with a dull tool? A very sharp tool?
2 1.34 Describe the consequences of exceeding the allowable wear and (Table 21.4) for various cutting-tool materials.
In metal cutting, use of low feeds and high cutting speeds are desired when the objective is a)High metal removal rate b)Use of soft cutting tool c)Surface finish d)Dry machining
21.38 As shown in Figure. 21.14, the percentage of the total cut?ting energy carried away by the chip increases with increasing cutting speed. Why?
22 .42 List and explain the considerations involved in determining whether a cutting tool should be reconditioned, recycled, or discarded after use.
Question 1: Explain the following terms and situations in metal cutting. Give enough explanation with figures if it is necessary. a) Up and down milling operations. What are the effects on the workpiece surface finish and machine tool? b) Orthogonal and oblique cutting. c) Cutting force diagram in orthogonal cutting. d) Theoretical prediction of shear angle in orthogonal cutting. e) Machinability. f) Force and chatter vibrations. How can you detect the vibration during the machining? How can you decide which type of the vibration you have? g) Mode shapes. Mode coupling. h) Process damping. Which parameters can affect the process damping? i) j) Regenerative chatter vibrations. k) Stability lobes. Question 2: How will the cutting force be affected by the following situations during the machining operation? Why? a) Large rake angle b) Small relief angle c) Large nose radius d) Sharp cutting edge e) Smooth rake face f) Hard workpiece material g) High cutting speed h) Large feed rate i)…
21.3 What is the cutting ratio? Is it always less than 1?explain