Method of making contact springs

摘要

A method of making single-piece contact springs by continuous punching from a metal strip. Each contact spring has in the finished state two spring arms which extend symmetrically relative to each other and are connected to a common connecting member. The spring arms have each a contact bend which are directed toward and are in contact with each other. The other end of the spring has a connecting post preferably provided with a press-in portion. A gap for the later formation of the spring arms is made during one of the punching operations of the blank in the plane of the strip as a scrapless punching cut. Simultaneously with the scrapless punching operation, one of the spring arms is bent out of the plane of the strip near the connecting member and is placed by a stamping operation into a position approximately parallel to the other spring arm which remained in the plane of the strip. In a subsequent deforming operation, the contact bends are formed simultaneously in both spring arms and the spring arms are crossed over each other transversely of the plane of the strip in the region of the contact bends.