Abstract:

In order to explore the extrusion law of large and small hollow thin-wall aluminum profiles for track, hyperxtrude simulation software is used to numerically simulate the extrusion process of hollow thin-wall aluminum profiles for track, explore the influence of mold structure and process parameters, and compare the forming rules of two similar shapes of large and small profiles. In terms of mold structure, the modification of welding chamber and drainage groove has the most obvious influence on large and small profiles. Through simulation analysis, it is found that changes in the welding chamber significantly reduce the maximum deformation of the large-profile material, with a reduction of 25.34%, while the for the small-profile material is 42.82%. At the same time, changes in the structure of the drainage groove show different impact trends; after altering the drainage groove, the maximum deformation reduction for the large-profile is 40.88%, while that of small-profile is 24.72%. The results show that because the drainage groove of small profile is shorter, and the modification of the drainage groove of large profile is more complicated, the change of drainage groove has a more significant impact on large profile. In terms of process parameters, the changes of metal deformation, metal flow rate differences, and the SDV values of the exit section of the profile under different conditions were analyzed. The results shows that the extrusion speed and die temperature have a more significant impact on the large-profile, while the billet diameter has a more pronounced effect on the small-profile. This finding provides important theoretical support for optimizing the extrusion process of aluminum profiles.

Key words: aluminum profile, extrusion, mold structure, process parameters, profile similarity