DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 30, Problem 18RQ
What is the principal advantage of using a moving wire electrode in electrodischarge machining?
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Chapter 30 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 30 - How do the MRRs for most NTM processes compare to...Ch. 30 - What are the steps in chemical machining using...Ch. 30 - In chemical machining, should the etchant be...Ch. 30 - What are the advantages of chemical blanking over...Ch. 30 - How are multiple depths of cut (steps) produced by...Ch. 30 - Would it be feasible to produce a groove 2 mm wide...Ch. 30 - A drawing calls for making a groove 23 mm wide and...Ch. 30 - Could an ordinary steel weldment be chemically...Ch. 30 - How could you produce a tapered section by...Ch. 30 - What is the principal application of...
Ch. 30 - How is ECM related to chemical machining?Ch. 30 - What effect does work material hardness have on...Ch. 30 - What is the principal cause of tool wear in ECM?Ch. 30 - Would electrochemical grinding be a suitable...Ch. 30 - Upon what factors does the metal removal rate...Ch. 30 - Why is the tool insulated in the ECM schematic?Ch. 30 - What is the nature of the surface obtained by...Ch. 30 - What is the principal advantage of using a moving...Ch. 30 - What effect would increasing the voltage have on...Ch. 30 - If a metal part is quite brittle and the part will...Ch. 30 - If you had to make several holes in a large number...Ch. 30 - Prob. 22RQCh. 30 - Explain (using a little physics and metallurgy)...Ch. 30 - Prob. 24RQCh. 30 - What are some possible defects that can result...Ch. 30 - What are some other uses for the laser other than...Ch. 30 - How does the laser produce coherent light...Ch. 30 - What is ablation?Ch. 30 - What is an excimer?Ch. 30 - In Figure 30.16, what is the protective tape...Ch. 30 - Why is the EBM process done in a vacuum?Ch. 30 - What is the major problem with the redesigned cap...
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- 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.arrow_forwardQuestion: TOOL WEAR AND CHIP FORMATION DURING MACHINING USING NANO-HYBRID COOLANT FOR TITANIUM What is the best Problem Statement based on the tittle?arrow_forwardProblem 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)arrow_forward
- i need the answer quicklyarrow_forwardI need the answer as soon as possiblearrow_forwardSHEET 5 Grinding, Welding and Galvanizing operations 1- Define Grinding process, what are the main characteristics of classification of a grinding wheel? 2- What are the main grinding operations, why coolant is uses in any cutting operation? 3- What are the main classes of welding? 4- With drawing explain flam different types, what type is used in cutting and why? 5- What are the differences between OXYACETYLENE and ARC welding? 6- What are the defects of ARC welding operation? 7- Explain the Electric Resistance Welding? 8- Define the GALVANIZING Process and what are the main governing parameters in this operation?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_forward4) Orthogonal cutting is performed on a metal whose mass specific heat C = 1.0 J/g-C, density = 2.9 g/cm3, and thermal diffusivity K = 0.8 cm2/s. Cutting speed = 3.5 m/s, uncut chip thickness = 0.25 mm, and width of cut = 2.2 mm. Cutting force = 950 N. Determine the cutting temperature if the ambient temperature= 25°C. %3D %3Darrow_forward04 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
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