4032铝合金花盘锻压成形技术

Forging technology of aluminum alloy 4032 faceplate

针对涡旋式压缩机花盘在温锻成形过程中出现的内壁开裂现象,对原成形工艺进行数值模拟,研究了终锻成形中的裂纹形成机理,并发现损伤值达到1.28。为了消除花盘侧壁开裂问题,提出在原工艺基础上改变毛坯形状,以提高金属流动的合理性,使锻件材料填充良好,变形均匀。通过对具有不同形状的毛坯成形过程的对比分析,给出了最优的毛坯形状:增大预锻件凹口深度,采用阶梯状凹口,针对外壁的截面形状,将原有的阶梯状改为圆弧状。采用改进的方案温锻花盘时,裂纹发生处的损伤值明显降低,仅有0.732,裂纹消失,各项指标都达到技术要求。改进后涡旋式压缩机花盘的成品率达到100%。

For the crack phenomenon of the scroll compressor faceplate internal wall during the warm forging process,the previous forming process was simulated.Then,the cracking mechanism in final forging was studied,and the damage value reached up to 1.28.In order to overcome the problem of cracking in the internal wall of faceplate,it was put forward to change the blank shape to improve the rationality of metal flow based on the previous process,and the material was filled well and in uniform deformation.Furthermore,through comparative analysis of the forming process of blank with different shapes,the optimal blank shape was given by increasing the depth of pre-forging notch,applying a stepped recess and changing ladder shape into arc shape based on the outer wall cross-sectional shape.After improving the scheme of warm forging for faceplate,the damage value at crack is reduced significantly to 0.732,and the crack disappeares.Thus,every indicator fits for the technical requirements,and the pass rate of scroll compressor faceplate is about 100%.