Patent ID: 6742374
Filing Date: 2004-06-01
Classification: B21D,B21J,B23P,C21D

Abstract:
A method for partly reinforcing a workpiece comprising the steps of:providing a forming die; providing a workpiece that is made up of a metal substrate having a reinforcement requiring part; applying heating means for forming a first heating atmosphere having a high temperature and a second heating atmosphere having a relatively lower temperature than the first heating atmosphere; placing the reinforcement requiring part in the first heating atmosphere and the other part of the workpiece in the second heating atmosphere, respectively, thereby heating up the reinforcement requiring part to a higher temperature than the other part; partly reinforcing the workpiece by bringing a forming surface area of the die into contact with at least the reinforcement requiring part followed by strongly pressing to quench-reinforce the reinforcement requiring part as compared to the other part of the workpiece; wherein said means comprises a furnace room and one or more partition walls disposed within said furnace room said one or more partition walls defining said first and second heating atmospheres that are disposed at a first and second temperature, respectively, the first temperature being higher than said second temperature.