20th International Forgemasters Meeting - IFM 2017

Evaluation of dimension and shape measurement during hot forging is an important process in open die forging. Correct dimension and shape evaluation reduces the risk of producing defective products and contributes to cost reduction, providing satisfactory yield. We have developed our own system for measuring hot dimension and shape during open die forging and put it into practical use. The system is equipped with a line laser and camera that can measure dimension and shape during hot forging in a relatively short time. In addition, automatic checking of image shapes makes it possible to get instantaneous judgment. This has eliminated problems of operation adjacent to hot materials using traditional gauges and measurement variation by operator, as well as achieving a higher percentage of good products and yield. Introduction of this system has improved workability of forging of different shapes (e.g. curved flat square shapes) and evaluation accuracy of hot dimension and shape. In addition, application of future material prediction (process modeling) can be anticipated.