Patent ID: 9714596
Date: 2017-07-25
CPC Classifications: B21D,B23P,F01N,Y10T

Claim:
1. A method of manufacturing an exhaust gas carrying device, in particular an exhaust gas purification device, which has an outer housing with an insert clamped therein, and wherein the insert comprises a substrate and a flexible bearing mat surrounding the substrate, the method comprising the following steps: a) providing a tool having a plurality of jaws which are adapted to be moved inwards against the outer housing, and wherein the jaws extend axially beyond a length of the outer housing; b) providing an indentation on an inside of each jaw, with indentations of all jaws being oriented in relation to each other such that a continuously surrounding indentation is obtained; c) placing the outer housing and the insert positioned therein into the tool; d) deforming the outer housing by closing the jaws to clamp the insert in the outer housing; and e) producing a continuously surrounding projection on the outer housing remote from ends of the outer housing when closing the jaws and deforming the outer housing and the flexible bearing mat such that the mat extends into the surrounding projection.