Importance

Loading Importance Indicators...

Abstract

A manufacturing method and equipment for intensifying hardness of screws includes at least three steps. A first step is to have a steel wire forged into a first blank with a screw head and a screw shank. A second step is to convey the first blank into a thread shaping die to have the outer diameter of the shank of the first blank diminished to form a second blank through the first sectional cold forging region of the thread shaping die for intensifying the hardness of the shank. A third step is to have the second blank directly moved into the second sectional thread-forming region of the thread shaping die to shape threads and a pointed tail of the shank. Thus, both the second step and the third step can be carried out within the same thread shaping die, able to elevate shaping speeds and hardness of screws.

Loading the Abstract Image...

First Claim