EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Textbook Question
Chapter 26, Problem 55SDP
On the basis of the contents of this chapter, describe your thoughts on whether or not it would be possible to design and build a “grinding center.” (See Chapter 25.) Comment on any difficulties that may be encountered in such machines and operations.
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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?
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.
Explain why the same grinding wheel may act soft or hard.
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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- 1. Small grains are used for grinding hard work materials and large grains are used for grinding soft work materials”. Explain the reason(s) behind this statement.arrow_forwardDescribe and explain the difficulties involved in grinding parts made of (a) thermoplastics; (b) thermosets; (c) ceramics.arrow_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_forward
- Rod 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_forwardWhy dressing is required for a continuously used wheel? and how can we dress a grinding wheel?arrow_forward1) Identify what are the step by step machining and grinding processes to produce that part from a blank material. Assume that both part made from cast iron. 2) Then, taking into consideration of green manufacturing/ sustainability, you need to suggest what kind of improvement that you could do to the list of machining processes that you have identified (e.g. change of machining operation, use of dry machining instead of using cutting fluid or etc.) to reduce power consumption during machining, reduce waste and even pollution. Please give justification on your suggestions. 3). You need to include the figure of your chosen part and label the processes involve.arrow_forward
- Problem 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_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_forwardi need the answer quicklyarrow_forward
- 2) Write the application and advantages of Honing Process? 3) Briefly explain the working of a centerless grinding operation with a neat sketch?arrow_forward(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°º. Determine the production rate of cylindrical work parts whose diameter = 0.5 in and length = 5.0 in.arrow_forwardc) It is planned to carry out the grinding operation using a grinding wheel of diameter 15 cm and width 2 cm, and using successive depths of cut of 0.02 mm, with two final cuts of 0.01 mm each. Wheel speed is 1450 m/min, work speed is 0.25 m/s and the cross feed is 0.4 mm. The number of active grits per area of the wheel surface is 0.75 grits/mm? with a grain aspect ratio of 20. i) Determine the Material Removal Rates for both depths of cut. ii) If the cycle time for one forward/return stroke of the work during grinding is 5 sec., estimate the total time taken to complete the job. ii) Considering a constant of proportionality K2 of 40,000, determine the maximum surface temperature of the work. iv) What recommendations would you give to reduce any surface damage owing to high work temperatures?arrow_forward
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