曲母线型铝合金筒形零件的旋压加工

摘要

目的：加工出3 mm厚的曲母线连接直壁段的大尺寸筒形铝合金零件。方法利用卧式数控旋压机，采用强旋、普旋相结合并辅以热旋的方案进行工艺试验。结果通过工艺试验摸索相关加工要点，采用先强旋出零件的小端锥曲线部位，再通过多道次加热普旋，加工出了厚度为3 mm的曲母线连接直壁段的大尺寸筒形铝合金零件。结论对于带有锥曲型面的大尺寸铝合金筒形件，采用强旋、普旋结合的工艺进行加工是可行的；零件毛坯方案、普旋时的收口量、零件扩径等因素是影响旋压加工成败的主要因素。%In order to machine 3 mm thick large-size cylindrical Al alloy part with curvilinear generatrix followed by straight-walled section, power-conventional spinning combination method supplemented with heat spinning via horizontal CNC spinning machine was explored through process tests, namely, power spinning of the conical curve section at the small end fol-lowed by multi-pass heat conventional spinning. It has been proved that power-conventional spinning combination method is feasible for the machining of large-size Al alloy cylindrical parts with cone-curved profile. Part blank design, necking amount of conventional spinning and part expanding are primary factors affecting the success of the above spinning processes.