Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 26, Problem 45QTP
To determine
Derive an expression for the angular velocity of the wafer shown in Fig. 26.30b as a function of the radius and angular velocity of the pad in chemical-
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Figure 9 shows the effect of rotary speed on the material removal rate by using conventional EDM and ultrasonic-assisted EDM.
Discuss on the effect of rotary speed on the material removal rate for both EDM processes.
Calculate the material removal rate and electrode feed rate in the electrochemical machining of an
iron surface that is 25 mm × 25 mm in cross-section, using NaCl in water as electrolyte. The gap
between the tool and the work-piece is 0.25 mm. The supply voltage is 12 volt D.C. The specific
resistance of electrolyte is 3 2 cm. Take for iron:
Valency = 2, Atomic weight = 55.85,Density = 7860 kg/m³.
Make a list about the process of Mechanical Grinding and another of Reactive Grinding, please be clear in your writing (preferably in digital format) and consider all the corresponding steps
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,...
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- (a) An engineer would like to drill a square hole of 20 mm x 20 mm with depth of 25 mm on a layered structure of natural fibre-reinforced polymer composite. He encountered delamination problem in the workpiece (Figure 3) when he used conventional cutting tool to drill the hole. Instead of using conventional machining process, discuss ONE suitable advanced machining process that can be applied for this machining purpose and predict TWO possible limitations for the selected process. Cutting Tool Delamination Composite Material Figure 3. Delamination of the composite material.arrow_forward(a) Figure 1 shows surface roughness and tolerances obtained in Chemical Machining (CM) and Electrochemical Machining (ECM) process for different types of electronic products. Comment on the differences between chemical and electrochemical machining process in terms of surface roughness and tolerance of the machined product as illustrated in Figure 1. 0.9 CM 0.8 0.7 Z ECM 0.6 0.5 0.4 0.3 0.2 0.1 Product A Product B Product C Product D Products 25 E ČM 20 Z ECM 15 10 Product A Product B Product C Product D Products Figure 1: Surface roughness and tolerances of various electronic products Surface roughness, Ra Tolerance, (t mm x 10)arrow_forward2. In the electrochemical machining of an iron surface with 20 mm× 20 mm in cross-section, the NaCl in water is adopted as electrolyte. The gap between the tool and workpiece is 0.2 mm. The supply voltage is 15 V DC. The specific resistance of the electrolyte is 2 Q cm. (For iron, valency=2, atomic weight=55.85, and density=7860 kg/m³). Please estimate the material removal rate and the tool feedrate.arrow_forward
- What is the mechanism material removal in EDM? Explain in detail.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(d) In one production line, there is ultrasonic machines (USM) and electro- discharge machines (EDM). You need to cut one material in form of thick plate. The material of the thick plate is aluminum. Choose the best machine that can be used to operate the plate. justify your answer by considering material removal rate, process duration, the material of the workpiece and the waste from the operation. (e) Discuss the major challenges in implementing computer integrated manufacturing (CIM) to the factory.arrow_forward
- In plane-strain orthogonal machining, the two main sources of energy dissipation are deformation along the shear plane (~70%) and friction at the tool-chip contact along the rake face (~30%). Consider plane-strain machining of a rigid perfectly-plastic work material whose uniaxial yield stress is 700 MPa, and is independent of strain rate and temperature. A tool of zero-degree rake angle is employed. Measurements showed the (deformed) chip thickness to be twice that of the undeformed chip thickness. Based on the aforementioned distribution of energy, estimate the specific energy for this process.arrow_forwardDefine specific energy for plane strain machining (cutting). In plane-strain machỉning, the two main sources of energy dissipation are deformation along the shear plane (~70%) and friction at the tool-chip contact along the rake face (~30%). Consider machining of a rigid perfectly-plastic work material whose uniaxial yield stress is 700 MPa, and is independent of strain rate and temperature. A tool of zero-degree rake angle is employed. Measurements showed the (deformed) chip thickness to be twice that of the undeformed chip thickness. Based on the aforementioned distribution of energy, estimate the specific energy for this process.arrow_forwardHand's On Ехample A grinding circuit is processing 450 t/h (of dry feed) with a mill drawing 3,150 kW. The circuit feed is 80% passing 2,500 um, and the circuit product is 80% passing 212 um. Calculate (a) The work input (b) Operating work index (c) The work input required to produce 80% passing 250 um. 14arrow_forward
- What are the materials and equipment in grinding high speed steel lathe tool bits? Explain.arrow_forwardExplain the distinct features of non-conventional machining which gave it superiority over the conventional machining?arrow_forwardA furniture company that makes upholstered chairs and sofas must cut large quantities of fabrics. Many of these fabrics are strong and wear-resistant, which properties make them difficult to cut. What nontraditional process(es) would you recommend to the company for this application? Justify your answer by indicating the characteristics of the process that make it attractive.arrow_forward
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