Patent ID: 9687903
Date: 2017-06-27
CPC Classifications: B21D,B23K,Y10T

Claim:
1. A method for manufacturing an assembly unit to be affixed to a counter face of a basic structure, the method comprising: providing an assembly part having an assembly side and an outer side facing away therefrom, the assembly part being formed of a material that cannot be welded with a material of the counter face of the basic structure; providing a welding element blank to be fixed in a through bore to be formed in the assembly part, the welding element blank being formed of a material that can be welded with the material of the counter face of the basic structure; the assembly part not yet having the through bore formed therein; stamping the welding element blank with a first end side, a second end side, and a peripheral surface out of a sheet metal blank by way of a first punch and a first hole die to form a peripheral surface having a cylindrical longitudinal portion extending away from the first end side, and an adjoining cone portion tapering towards the second end side and forming therewith a cutting edge, the first punch engaging the second end side; and stamping the welding element blank with the cutting edge as a leading edge into the assembly part by way of a second punch and a second hole die to thereby form the through bore in the assembly part, the second punch engaging the first end side.