**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 of 1300 amps. Efficiency is 97%. Determine the feed rate and time to cut through the plate. The specific removal rate \( C \) for stainless steel is \( 2.46 \times 10^{-2} \, \text{mm}^3/\text{A-s} \).**Problem 2. (Electric Discharge Machining)**Iron is to be machined in an EDM operation. If the discharge current is 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 \( K \) is 664 in SI units (5.08 in U.S. customary units).

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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)

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)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.

Question

**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 of 1300 amps. Efficiency is 97%. Determine the feed rate and time to cut through the plate. The specific removal rate \( C \) for stainless steel is \( 2.46 \times 10^{-2} \, \text{mm}^3/\text{A-s} \).

**Problem 2. (Electric Discharge Machining)**

Iron is to be machined in an EDM operation. If the discharge current is 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 \( K \) is 664 in SI units (5.08 in U.S. customary units).

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