EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 9780100793439
Author: KALPAKJIAN
Publisher: YUZU
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Chapter 26, Problem 36QTP
Calculate the chip dimensions in surface grinding for the following process variables: D = 10 in., d = 0.001 in., v = 100 ft/min, V = 5000 ft/min, C = 500 per in2, and r = 20.
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In a surface grinding operation performed on a 6150 steel workpart (annealed,
approximately 200 BHN), the designation on the grinding wheel is C-24-D-5-V.
Wheel diameter =178 mm and its width= 25 mm. Rotational speed = 3000 rev/min.
Infeed = 0.05 mm per pass, crossfeed = 12.5 mm, and workpiece speed = 6 m/min.
This operation has been a source of trouble right from the beginning. The surface
finish is not as good as the 0.4 µm specified on the part print, and there are signs of
metallurgical damage on the surface. In addition, the wheel seems to become
clogged almost as soon as the operation begins. In short, nearly everything that can
go wrong with the job has gone wrong. (a) Determine the rate of metal removal
when the wheel is engaged in the work. (b) If the number of active grits per cm? =
30, determine the average chip length and the number of chips formed per time. (c)
What changes would you recommend in the grinding wheel to help solve the
problems encountered? Explain why you…
Write the applications of bench grinding machines.
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Chapter 26 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 26 - What is an abrasive? What are superabrasives?Ch. 26 - How is the size of an abrasive grain related to...Ch. 26 - Why are most abrasives made synthetically?Ch. 26 - Describe the structure of a grinding wheel and its...Ch. 26 - Explain the characteristics of each type of bond...Ch. 26 - What causes grinding sparks in grinding? Is it...Ch. 26 - Define metallurgical burn.Ch. 26 - Define (a) friability, (b) wear flat, (c) grinding...Ch. 26 - What is creep-feed grinding and what are its...Ch. 26 - How is centerless grinding different from...
Ch. 26 - What are the differences between coated and bonded...Ch. 26 - What is the purpose of the slurry in...Ch. 26 - Explain why grinding operations may be necessary...Ch. 26 - Why is there such a wide variety of types, shapes,...Ch. 26 - Prob. 15QLPCh. 26 - The grinding ratio, G, depends on the type of...Ch. 26 - What are the consequences of allowing the...Ch. 26 - Explain why speeds are much higher in grinding...Ch. 26 - Prob. 19QLPCh. 26 - Prob. 20QLPCh. 26 - Prob. 21QLPCh. 26 - Referring to the preceding chapters on processing...Ch. 26 - Explain the reasons that so many deburring...Ch. 26 - What precautions should you take when grinding...Ch. 26 - Prob. 25QLPCh. 26 - What factors could contribute to chatter in...Ch. 26 - Prob. 27QLPCh. 26 - Prob. 28QLPCh. 26 - Describe the effects of a wear flat on the overall...Ch. 26 - What difficulties, if any, could you encounter in...Ch. 26 - Prob. 31QLPCh. 26 - Prob. 32QLPCh. 26 - Prob. 33QLPCh. 26 - Jewelry applications require the grinding of...Ch. 26 - List and explain factors that contribute to poor...Ch. 26 - Calculate the chip dimensions in surface grinding...Ch. 26 - If the strength of the workpiece material is...Ch. 26 - Assume that a surface-grinding operation is being...Ch. 26 - Estimate the percent increase in the cost of the...Ch. 26 - Assume that the energy cost for grinding an...Ch. 26 - It is known that, in grinding, heat checking...Ch. 26 - Prob. 45QTPCh. 26 - With appropriate sketches, describe the principles...Ch. 26 - Prob. 47SDPCh. 26 - Vitrified grinding wheels (also called ceramic...Ch. 26 - Conduct a literature search, and explain how...Ch. 26 - Visit a large hardware store and inspect the...Ch. 26 - Obtain a small grinding wheel or a piece of a...Ch. 26 - In reviewing the abrasive machining processes in...Ch. 26 - Obtain pieces of sandpaper and emery cloth of...Ch. 26 - On the basis of the contents of this chapter,...
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- Find metal removal rate is sur face grinding a(300mm) long and (60mm) width of rectangulare steel work Piece whose speed is (15 m/min) defth of (cut and width of grinding Pathz lomm? = 0.05mm) of Oarrow_forward13) Manufacturers are designing grinding spindles to turn at higher and higher speeds. What is the main reason for this, and what is one drawback of increasing speed? 14) Name 2 reasons why cost increases as finish allowances decrease (See Figure 9.40).arrow_forwardProblem 5. (Grinding Operations and Grinding Machines) (USCS units) In a centerless grinding operation, the grinding wheel diameter = 8 in, and the regulating wheel diameter = 5.0 in. The grinding wheel rotates at 1500 rev/min, and the regulating wheel rotates at 180 rev/min. The inclination angle of the regulating wheel = 2.3°. Determine the production rate of cylindrical work parts whose diameter = 0.5 in and length = 5.0 in. Equations used V = TDN RMR lc = = √ Dd rg = vwwd nc = U w' vwC Fev Vwwd 0.25 w d K₁ (TWOW) 0.5 (1) 0² VC D F'c = K₁ Ts = K₂d0.75 GR= Vw Vg 0.5 (TCU) OD fr = TD,N, sin I D0.25arrow_forward
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- Please solve fast with correct answerarrow_forward1. Using a horizontal axis surface grinder, a flat surface of high strength steel sizing 150 mm× 300 mm is to be ground. A grinding wheel with 200 mm diameter and 20 mm thickness is used. Assume a table speed, wheel speed and in-feed rate of 10 m/min, 20 m/s, and 5mm/pass, respectively. Please estimate the grinding time required.arrow_forwardSpeed of Ball Mill In a ball mill of diameter 2000 mm, 100 mm dia steel balls are being used for grinding. Presently, for the material being ground, the mill is run at 15 rpm. At what speed will the mill have to be run if the 100 mm balls are replaced by 50 mm balls, all the other conditions remaining the same?arrow_forward
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