Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 26, Problem 43QTP
It is known that, in grinding, heat checking occurs when grinding is done with a spindle speed of 5000 rpm, a wheel diameter of 8 in., and a depth of cut of 0.0015 in. for a feed rate of 50 ft/min. For this reason, the standard operating procedure is to keep the spindle speed at 3500 rpm. If a new, 10-in.-diameter wheel is used, what spindle speed can be used before heat checking occurs? What spindle speed should be used to keep the same grinding temperatures as those encountered with the existing operating conditions?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
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…
1/
Belt grinding is an example of primary shaping process.
Select one:
True
False
1) The specification of a grinding wheel is given as follows:
32A 40 L10 B
Give the complete interpretation of the underlined segments in the grinding wheel specification.
2) Explain briefly how the dressing operation is performed prior to grinding on a surface grinding machine.
3) As the manager of a large machining workshop you are required to prepare the specifications of a lathe machine to be purchased to replace an old one which has been used for the last 25 years. Outline the main specifications that you deem important to suit the requirements of the workshop.
4) Outline the principle of Electro Discharge Machining (EDM) and its scope of use in industry.
5) Outline the principle of Ultra Sonic testing for checking deeply imbedded defects in a welded joint.
Chapter 26 Solutions
Manufacturing Engineering & Technology
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,...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Depth-of-cut range for surface grinding is: a. 0.010"0.100" b. 0.0001"0.0002" c. 0.0001"0.003" d. 0.00001"0.00005"arrow_forward2 Answer the following questions by circling True or False. 1. Open structures are used for precision forms and profile grinding. 2. In centre-less grinding operation, it is possible to grind cylindrical workpiece without actually fixing the workpiece using centres or a chuck. ( ) 3. Since all the machining parameters are built into the broach, very little skill is required from the operator. ( ) 4. The machined surface should be used as the clamping surface as it can improve the clamping stability. 5. During the measurement, a comparator is able to give the deviation of the dimension from the set dimension.arrow_forward11) An internal bore is ground to 100 mm, removing 0.3 mm stock. To accomplish this, a grinding wheel 80% of the finished size is used. The wheel is dressed every 15 cycles because it is observed that the radial wheel wear is 0.05 mm on average. Assume wheel and part widths are equal. a. What dressing depth would you recommend and why? b. Calculate the G-ratio of this operation.arrow_forward
- A note States leave in minimum of .005" on all surfaces to allow for grinding after heat treat what should the size of a 2.000" diameter shaft be prior to heat treating?arrow_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_forward. Briefly explain the working of a centerless grinding operation with a neat sketch?arrow_forward
- 11) Name 2 adverse effects of allowing the workpiece to become too hot in grinding. 12) Name 2 reasons coolant is used in grindingarrow_forward5. Types of Grinding Wheel Machines and their outputs. (atleast 3)arrow_forward2180 Exam #3 8. (T/F) Surface grinding is an effective machining process for a tolerance grade of 8,arrow_forward
- Q :4i. Explain why the same grinding wheel may act soft or hard.ii. Why are grinding operations necessary for parts that have been machined by other processes?iii. Explain how the EDM process is capable of producing complex shapes.iv. Explain why the mechanical properties of workpiece materials are not significant in most of the processes described in Nontraditional Machining Processesarrow_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_forwardWrite the applications of bench grinding machines. ( type by Keyboard two pages at least )arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Precision Machining Technology (MindTap Course Li...Mechanical EngineeringISBN:9781285444543Author:Peter J. Hoffman, Eric S. Hopewell, Brian JanesPublisher:Cengage Learning
Precision Machining Technology (MindTap Course Li...
Mechanical Engineering
ISBN:9781285444543
Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Publisher:Cengage Learning
Types of Manufacturing Process | Manufacturing Processes; Author: Magic Marks;https://www.youtube.com/watch?v=koULXptaBTs;License: Standard Youtube License