Taking the warm extrusion of contactor socket used in high voltage condition as an example

the effects of technology parameters such as friction coefficient

speed of die pressing

billet size on the warm extrusion formability of pure copper are analyzed.A mathematical model is established by taking the process parameters（friction coefficient

speed of die pressing

billet size）as variables while the simulation results（forming load

maximum damage）as responses

based on model-based calibration（MBC）toolbox in MATLAB software.The optimum process parameters are achieved by the CAGE optimization module in MBC toolbox

namely

the friction coefficient is 0.34

the billet diameter is 83.5 mm

the speed of die pressing is 30～40 mm/s.Production practice shows that the process parameters after multi-objective optimization can get contactor socket without any defects on surface

what is more

it can reduce the maximum damage and forming load effectively

the utilization of material is also improved obviously.