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The main function of the lubricant is to reduce the tensile or compressive stresses required in metal forming.

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in Casting-Forming-Welding II by (119k points)
The main function of the lubricant is to reduce the tensile or compressive stresses required in metal forming.

(a) True

(b) False

This question was posed to me in an interview.

My question is from Friction and Lubrication in Metal Forming in section Types of Die & Metal Forming Processes of Casting-Forming-Welding II

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Correct answer is (b) False

Easiest explanation: The main function of the lubricant is to control the frictional force that arises due to sliding contact between the sheet metal and cutting tool material during sheet metal forming operation. Lubricants are also used to prevent galling problems by protecting tool material from direct contact with the sheet material.

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