Patent ID: 9352377
Filing Date: 2016-05-31
CPC Classification: B21D,B21J,C21D,C22F,Y10T

Claim Text:
1. A method for producing a joint in at least two overlapping metal work pieces using a joining tool to obtain a mechanical joint between the overlapping work pieces, wherein at least one of the first work piece and second work piece is a sheet material made of an aluminium alloy of AA7000-series, and wherein there is applied a heat-treatment with a temperature in the range of 100° C.-230° C. to at least the work piece of said 7000-series sheet material within 120 minutes prior to the production of the joint and/or for at least part of the time during production of the joint to reduce the tensile strength in the joining area of at least the work piece of said 7000-series sheet material.