Process Simulation of Tube Stamping on HyperWorks Platform

The main targets of automotive industry can been represented by (a) the reduction of the vehicles environmental impact (pollutions, fuel consumption, CO2 emission), (b) the increase of safety (impact absorption performance, crash resistance, pedestrian safety, etc.), and (c) the improved accuracy and quality for easier, cheaper and more reliable joining and assembly of final components. These requirements are forcing car manufacturers to a continuous research for new solutions, leading to the most significant evolution and innovation in sheet metal forming technologies.

The importance of high-strength steel concepts for car bodies has increased in the last years due to the meeting of reduction in weight and enhanced crash safety requirements. By hot stamping of boron alloyed heat-treatable steels it is possible to produce components with a much higher strength than by cold forming processes.

Hot stamping allows to compensate the disadvantages of machining in conventional manufacture processes. This process combines the forming and heat treatment of a sheet metal material with the objective of hardening . At this process a blank component of temperable steel is heated up to a temperature of about 950 °C to achieve austenitic microstructure. Afterwards it is formed with a tool with a cooled punch to quench the transformed parts of the blank to get highest-strength martensitic microstructure.

Therefore the investigations in this study focus on process simulation of conductive heating which is one of significant production processes in hot stamping. Influence of process parameters (such as cooling , heat transfer etc. ) on results , springback ,thickness distribution , formability evaluation  are investigated by using Hyperworks platform and simulation results are compared with experimental results.

 

The Author

Metin ÇALLI
FEA Responsible
Coşkunöz Metal Form