Tool durability depends on the accuracy requirement level to the rolled billets, deformation temperature and tool material. Besides the significant factor is an individuality of different companies in working rules. That is why tool durability is specified as average value. Durability index is the number of rolled billets. The tool is delivered heat treated in order to improve accuracy figure. Tool dimensions have a maintenance allowances that providing effect repair from 3 to 5 times by means of sequential decreasing of its height.
The tool is designed of steel that is used for stamp manufacturing.
Durability average indexes in practice are the following:
1. 400000 workpieces designed for further grinding operation.
2. 1000000 workpieces designed for further stamping.