工艺参数对挤压铜/铝复合板静水压力的影响

Effect of Process Parameters on Hydrostatic Pressure of Cu/Al Composite Sheet during Extrusion

利用Deform-3D软件对双坯料隔离挤压焊合铜/铝复合板成形过程进行了模拟,获得了工艺参数对变形通道内和焊合面上的静水压力的影响规律。结果表明:从变形体与挤压杆接触的端面至挤出板的区域沿挤压方向静水压力值越来越小;随着挤压速度的增大或坯料初始温度的降低,变形通道和焊合面上的静水压力值升高,且其随挤压速度变化呈近线性;但在800～850℃时,静水压力值变化不明显,而在低于800℃和高于850℃时,静水压力值分别陡升和陡降。

The forming process of separate extrusion of Cu/Al composite sheet with double billets was simulated.The influence of process parameters on the hydrostatic pressure in the deformed channel and the welding surface was obtained.The results show that along the extrusion direction from the end of the contact between the deformable body and the extruding rod to extruded plate zone,the hydrostatic pressure becomes smaller and smaller.With the increase of the extrusion speed or the decrease of the initial temperature of the blank,the hydrostatic pressure value on the deformation channel and welding surface increases,and it is nearly linearly changed with the extrusion speed changing.But in 800-850℃,the hydrostatic pressure value does not change obviously,but when the temperature is below 800℃and over 850℃,the hydrostatic pressure value rises steeply and drops steeply,respectively.