Hot stamping

Hot stamping is a forming method that reduces springback. The process involved is as follows: preheat a sheet material up to austenite temperature first; then perform hot forming followed by tempering with rapid cooling to obtain a high-strength sheet panel.

JSTAMP can consider temperature dependency of the material and heat transfer to the mold by using thermal-structural interaction analysis.

A tool model built with solid elements can be used to evaluate the temperature distribution history during multishot.

This example involves a hot stamping simulation using the Benchmark test model 3 (BM3) presented at the Numisheet 2008 international conference. JSTAMP can animate changes in the temperature distribution. The Continuous Cooling Transformation (CCT) diagram evaluation feature, which predicts quenching at a given location in the model based on Vickers hardness, is useful as well. In this example, the predicted Vickers hardness was 464, which agrees with the experimental result.