Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 12, Problem 10RQ
What is the difference between machining allowance and dimensional tolerance?
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Estimate the manufacturing cost for a simple machined component: a. Compare the costs for manufacturing volumes of 1, 10, 100, 1000, and 10,000 pieces with an intermediate tolerance and surface finish. Explain why there is a great change between 1 and 10 and a small change between 1000 and 10,000 pieces. b. Compare the costs for fit, intermediate, and rough tolerances with a volume of 100 pieces. c. Compare the costs of manufacturing the component out of various materials.
METAL CUTTING
A process engineer is trying to improve the life of a cutting tool. He has run a 23 experiment using (1) cutting speed, (2) metal hardness, (3) and cutting angle as the factors. The data from the 2 replicates are shown below.
(a) Do any of the 3 factors affect tool life?
(b)what combination of the factor levels produces the longest tool life?
(c) Is there a combination of cutting speed and cutting angle that always gives good results regardless of metal hardness?
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Chapter 12 Solutions
Manufacturing Engineering & Technology
Ch. 12 - Why are steels more difficult to cast than cast...Ch. 12 - What is the significance of hot spots in metal...Ch. 12 - What is shrinkage allowance? Machining allowance?Ch. 12 - Explain the reason for drafts in molds.Ch. 12 - Prob. 5RQCh. 12 - What are light castings and where are they used...Ch. 12 - Name the types of cast irons generally available,...Ch. 12 - Comment on your observations regarding Fig. 12.5.Ch. 12 - Describe the difference between a runner and a...Ch. 12 - What is the difference between machining allowance...
Ch. 12 - What is dross? Can it be eliminated?Ch. 12 - Describe your observation concerning the design...Ch. 12 - If you need only a few castings of the same...Ch. 12 - Do you generally agree with the cost ratings in...Ch. 12 - Describe the nature of the design differences...Ch. 12 - Note in Fig. 12.5 that the ductility of some cast...Ch. 12 - Do you think that there will be fewer defects in a...Ch. 12 - Explain the difference in the importance of drafts...Ch. 12 - What type of cast iron would be suitable for...Ch. 12 - Explain the advantages and limitations of sharp...Ch. 12 - Explain why the elastic modulus, E, of gray cast...Ch. 12 - If you were to incorporate lettering or numbers on...Ch. 12 - The general design recommendations for a well in...Ch. 12 - The heavy regions of parts typically are placed in...Ch. 12 - What are the benefits and drawbacks to having a...Ch. 12 - When designing patterns for casting, patternmakers...Ch. 12 - Using the information given in Table 12.2, develop...Ch. 12 - The part in Figure P12.28 is to be cast of 10% Sn...Ch. 12 - Describe the general design considerations...Ch. 12 - Add more examples of applications to those shown...Ch. 12 - Explain how ribs and serrations are helpful in...Ch. 12 - List casting processes that are suitable for...Ch. 12 - Small amounts of slag and dross often persist...Ch. 12 - If you need only a few units of a particular...Ch. 12 - For the cast metal wheel illustrated in Fig....Ch. 12 - Assume that the introduction to this chapter is...Ch. 12 - In Fig. P12.37, the original casting design shown...Ch. 12 - An incorrect and a correct design for casting are...Ch. 12 - Using the method of inscribed circles, shown in...Ch. 12 - A growing trend is the production of patterns and...Ch. 12 - Repeat Problem 12.40 for the case where (a) a...
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- Dear Tutor please help me pleasearrow_forwardThe tool signature of a single point cutting tool in ORS system is 10° – 15° – 20° – 15° – 30° – 60° – 0 mm. Assume reasonable length of the tool, cross-sectional area, shank length and other dimensions if required. (a) Draw an isometric view (in scale) of the single point cutting tool. (b) Show all the angles clearly in sectional views.arrow_forward6MENG201 Mechanical workshop practicearrow_forward
- Subject: manufacturing processarrow_forwardWhat are assessments that measure strength, speed, agility, or high-speed strength? What are the protocols and norms for each?arrow_forwardrequirements form into different Shape, why do we need it in the design of machine elements well within the elastic deformation regime?|arrow_forward
- 1. The process best in terms of close control of tolerance and surface finish is a. Casting c. Joining e. All of the above b. Forming d. Machining f. None of the above Your answer is: . 2. Castability is poor for: a. High melting point material c. Ductile material b. Low melting point material d. All of the above e. None of the above Your answer is: . 3. The material which can be manufactured by non-conventional method is/are b. Titanium alloy a. Ceramics c. Super alloys d. All of the above e. None of the above Your answer is: . 4. Hand tools like wrenches, spanner etc. are made by the process of a. Casting c. Machining e. None of the above Your answer is: . b. Forging d. Rolling 5. Riser is designed to ensure that molten metal in riser a. Freezes before the casting c. Freezes at the same time as the casting b. Freezes after the casting d. All of the above e. None of the above Your answer is: .arrow_forwardWhich order arranges the following manufacturing processes from the least precise to the most precise tolerance limits?POSSIBLE ANSWERS1 . Turning, grinding, casting2 . Casting, turning, grinding3 . Casting. grinding, turning4 . Turning, casting, grindingarrow_forwardI need answer within 20 minutes please please with my best wishesarrow_forward
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