Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 34, Problem 11RQ
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Problem 1. (Electrochemical Machining)
An ECM operation is used to cut a hole into a plate of stainless steel that is 10 mm thick. The hole has a
rectangular cross section, 15 mm by 25 mm. The operation is accomplished at a current = 1300 amps.
Efficiency is 97%. Determine the feed rate and time to cut through the plate. The specific removal rate C
for stainless steel = 2.46 x 10-² mm³/A-s.
Problem 2. (Electric Discharge Machining)
Iron is to be machined in an EDM operation. If discharge current = 30 amps, what is the expected metal-
removal rate? The melting point of iron is known to be 1539°C, and the metal removal rate constant of
proportionality K = 664 in Sl units (5.08 in U.S. customary units)
Chapter 34 Solutions
Manufacturing Engineering & Technology
Ch. 34 - Explain why surface treatments may be necessary...Ch. 34 - What is shot peening? Why is it performed?Ch. 34 - What are the advantages of roller burnishing?Ch. 34 - Explain the difference between case hardening and...Ch. 34 - Describe the principles of physical and chemical...Ch. 34 - Review Fig. 34.2 and describe the principles...Ch. 34 - Prob. 7RQCh. 34 - Prob. 8RQCh. 34 - Prob. 9RQCh. 34 - Prob. 10RQ
Ch. 34 - Prob. 11RQCh. 34 - Prob. 12RQCh. 34 - Prob. 13RQCh. 34 - Prob. 14RQCh. 34 - Prob. 15RQCh. 34 - Prob. 16RQCh. 34 - Describe how roller-burnishing processes induce...Ch. 34 - Explain why some parts may be coated with...Ch. 34 - Prob. 19QLPCh. 34 - Prob. 20QLPCh. 34 - Prob. 21QLPCh. 34 - It is well known that coatings may be removed or...Ch. 34 - Make a list of the coating processes described in...Ch. 34 - Sort the coating processes described in this...Ch. 34 - Why is galvanizing important for automotive-body...Ch. 34 - Explain the principles involved in various...Ch. 34 - Taking a simple example, such as the parts shown...Ch. 34 - Estimate the plating thickness in electroplating a...Ch. 34 - Which surface treatments are functional, and which...Ch. 34 - An artificial implant has a porous surface area...Ch. 34 - If one is interested in obtaining a textured...Ch. 34 - It is known that a mirrorlike surface finish can...Ch. 34 - It has been observed in practice that a thin layer...Ch. 34 - Prob. 34SDPCh. 34 - Prob. 35SDPCh. 34 - Because they evaporate, solvents and similar...Ch. 34 - Prob. 37SDPCh. 34 - The shot-peening process can be demonstrated with...Ch. 34 - Prob. 39SDPCh. 34 - Prob. 40SDP
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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
- A 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(Electrochemical Machining) An ECM operation is used to cut a hole into a plate of stainless steel that is 10 mm thick. The hole has a rectangular cross section, 15 mm by 25 mm. The operation is accomplished at a current = 1300 amps. Efficiency is 97%. Determine the feed rate and time to cut through the plate. The specific removal rate C for stainless steel = 2.46 × 10-2 mm3/A-s. R - V = CIt I = V = gr A V At fr EA gr C(EAt) gr fr CI A CE gr Typical values of specific removal rate C' for selected work materials in electrochemical machining. Compiled from data in [11]. Specific Removal Rate C Materialª mm³/amp-sec (in³/amp-min) Materialª Aluminum (3) Copper (1) Iron (2) Nickel (2) 3.44 x 10-2 7.35 × 10-2 3.69 × 10-2 (1.26 × 10-4) (2.69 x 10-4) (1.35 × 10-4) 3.42 × 10-2 (1.25 × 10-4) X Low alloy steel High alloy steel Stainless steel Titanium (4) Specific Removal Rate C mm³/amp-sec (in³/amp-min) (1.1 × 10-4) 3.0 x 10-2 2.73 × 10-2 2.46 × 10-2 (1.0 × 10-4) (0.9 × 10-4) 2.73 x 10-2 (1.0 ×…arrow_forwardAn electrochemical machining (ECM) is to be used to cut a through hole into a 12 mm thick aluminum plate. The hole has a rectangular cross-section, 10 mm × 30 mm The ECM operation will be accomplished in 2 minutes, with efficiency of 90%. Assuming specific removal rate for aluminum as 3.44 x10² mm³ /(As), the current (in A) requiredarrow_forward
- What is the major benefit of cutting fluids that contain water?arrow_forward5. What are the adverse effects of tool wear in cutting processes? 6. What characteristics are required for cutting tool materials? V. Comprehensive questions. 1. Match each part with the most proper manufacturing process. (1) Aluminum beverage can Centrifugal casting (2) Copper wire Closed-die forging (3) Engine cylinder Die casting (4) Lathe body Drawing (5) Link rod of an engine Sand casting (6) Magnesium alloy camera frame Sheet-metal formingarrow_forwardWhich of the following processes resulted in metallurgical damage to the cut surface: a. Ultrasonic machining b. Water jet cutting C. Plasma arc cutting d. Electrochemical machining e. None of themarrow_forward
- 04 05 a Explain the reasons for the following: 1- The pure aluminum and the copper are generally rated as easy to machine 2- In ultrasonic machining, the stress produced by the impact of abrasive particles on the workpiece surface is high. 3- In rolling process, the coefficient of friction must be sufficient. 4- Difference in solidification between casting and welding processes. 5- Why is it desirable to use energy sources for welding that have high heat densities? 6- Why there might be a change in the density of a forged product as compared to that of the cast blank. D. A cylindrical workpart with D=2.5 in and h=2.5 in is upset forged in an open die to a height = 1.5 in. Coefficient of friction at the die -work interface = 0.10 The work material has a flow curve defined by: K= 40,000 lb/in' and n-0.15. Determine the instantaneous force in the operation (a) just as the yield point is reached (yield at strain = 0.002), (b) at height = 2.3 in. (c) h= 1.9 in, and (d) h = 1.5 in. a List…arrow_forward(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-Illustrate the process of the Water Jet Machining (WJM) system compare to EDM (Electrical Discharge Machine) wire cutting in term of cutting operation.arrow_forward
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