Design of Fit Between Die and Insert

Now-a-days increasing the productivity and the quality of the part manufactured are the main challenges in the steel forging industry. Die creation is one among the big challenge faced by the industry now-a-days. For small parts that have to be forged the technique used is to create an insert which should perfectly fit in the die block. Presently the technique used is by creating an shrinkage fit by heating the die block up to 550°C for a period of 3 hours so that the diameter of the die block increases so that the insert with larger diameter than the die block in cold condition can perfectly fit in the die block. This technique is not economical as the cost for heating the die block is quite high.