Hot heading plastic rivets by resistance heating

摘要

Welding apparatus including a tube of high resistance material brazed between two electrical conductive tubes connected to the secondary of a resistance welding transformer. Also included is a plastic element having a head projecting through a hole of a metallic element. By initiating forcible contact between the tube and the head of the plastic element, such head is heated, softens and becomes upset to form an interlock with the metallic element.