Question 3 a)In an Electrochemical Machining process, thefeedstock is made of an aluminium alloy (Ultimate TensileStrength=572 MPa, Tensile Yield Strength=503 MPa). The desired timeto machine a hole (?=10 mm) through a 20 mm-thick part is 2.1 minat a feed rate of 0.18 mm/s. What are: (i)the efficiency of theprocess in %, and (ii)the current requirement in amps to achievethis machining time target? [30 marks] Describe in detail theprocess of circular sawing with the aid of a freehand sketch. Whatare the two major mechanisms by which circular sawing is achievedand what materials are commonly used as circular saws of eachtype?
