EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 9780100793439
Author: KALPAKJIAN
Publisher: YUZU
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Textbook Question
Chapter 26, Problem 16QLP
The grinding ratio, G, depends on the type of grinding wheel, workpiece hardness, wheel depth of cut, wheel and workpiece speeds, and the type of grinding fluid. Explain.
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25 MENG201 Mechanical workshop practice
Explain why the same grinding wheel may act soft or hard.
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…
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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- Subject: Manufacturing Processes Please do all partsarrow_forwardGrinding wheels wear like conventional cutting tools. Three wear mechanisms are known as the main causes of wear in grinding wheels. 1) Grain break 2) frictional wear 3) Which of the following words best complements the space given above? Taşlama tasları konvanci 1) Tane kırılması 2) s. rtünr e li aşınması 3) Yukarıda verilen ho 35 - -.UI NCSICI lakimiar gibi aşilai. vy ayinHun anizma t- ima taslarında aşınmanın ana sebepleri olarak seb yd en uygu namlayan kelime aşağıdakilerden hangisidir? O A) Shotpeening Bilyalı dövme O B) Friability Ufalanabilirlik O C) None Hiçbiri O D) Bond break Bağ kopmasI O E) Frictional wear Sutuonarrow_forward27) (a) Grinding wheel manufacturer has written the following information"W A 46 B 5 E 17" on the grinding wheel. Explain (b) Sketch and explain the centerless grinding. (c) Neatly sketch and define reaming and countersinking operationarrow_forward
- Estimate the relative cost of grinding a steel part to a tolerance of ±0.0005 in versus turning it to a tolerance of +0.003 in.arrow_forwardWhy is it necessary to grind HSS lathe tool bits? What are the objectives in Grinding HSS Lathe Toolbits? Elaborate your answer and please make it typewritten.arrow_forwardManufacturers 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? Name 2 reasons why cost increases as finish allowances decrease. Tool temperatures are low at low cutting speeds and high at high cutting speeds, but low again at even higher cutting speeds. Explain why.arrow_forward
- i need the answer quicklyarrow_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_forwardRod Mills, Ball Mills and Autogenous Mills are different types of tumbling mills used in the metalliferous industry. What equipment, if any, usually accompanies each of these mills in grinding circuits and why.arrow_forward
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