Based On The Hyperxtrude Porous Mould Research And Application

The single-hole extrusion process is widely applied by aluminium profile industry in our country, but the productivity is low. With the multi-hole extrusion process, which can reduce the extruding coefficient and the peak extrusion pressure, the ratio of finished product is improved and the waste is also reduced within the same butt length via increasing the billet length.It is the first time to simulate the multi-hole extrusion process through the software "HyperXtrude", in which the characteristics of metal flow during extrusion is systematically researched.With the multi-hole plane pocket dies, the influences of different steps and depth to extrusion pressure, metal flow and the temperature of die and profile are comprehensively researched. The result indicates that metal flows easier with multi-steps in the die pocket, both the temperature rise of die and the peak extrusion pressure are reduced. In the case of triple-step pockets, the effect of pocket depth on metal flow is also studied, and the best result is achieved with the same pocket depth.With the multi-hole diffluent compound dies, mechanical models are established, the causes for die mandrel deviation are researched with HyperXtrude software. The main factor leading to die mandrel deviation is the different mandrel sinking caused by different deflection of each port bridge. In addition, non-uniformity of the metal flow in each porthole leads to heterogeneity of static pressure around die core, which finally result in mandrel deviation.Taking1547C profile for an example, make a comparison between the experiment verification and simulation results. The peak pressures, the force conditions of die, extruded profile noses and temperature of profile are very close to those predicted from the FEM simulations. On this basis, a new design idea is presented.