Question

In thread rolling, the rolling speed only depends on the tensile strength of the material being rolled.

(a) True

(b) False

I had been asked this question at a job interview.

I'd like to ask this question from Thread Rolling in division Miscellaneous Forming Processes of Casting-Forming-Welding II

Answer 1

Correct answer is (b) False

To explain: It is very important to select appropriate rolling speed in thread rolling process to produce products of better thread quality and for long life of the rolls. The rolling speed mainly depends on the tensile strength, the speed capabilities of the machine and the thread form to be rolled. In general, the rolling speed kept is very high. But if the speed is too low, then it may cause damage to the rolls.