Question

Why material removal processes (milling, turning, etc.) are used as secondary process after a primary process (casting, forging, etc.)?

Select one:
a. to reduce material waste
b. to improve the strength of a part
c. to reduce the weight of a part
d. all of the above

Answer 1

a. to reduce material waste

Step-by-step explanation:

This just begs the question, "what is the difference between forming and machining?"

Forming involves changing the shape of the material by permanent plastic deformation. This is the primary process that involves casting and forging of material. The advantages of forming processes include no wastage of the raw material, better mechanical properties of the product and faster production rate. Machining is the process of removing the material in the form of chips by means of a wedge shaped tool(the secondary process). Milling and turning are used as final stage procedures to produce desired final shape of material.