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以某离合器波形片为研究对象,利用Dynaform有限元软件对波形片的成形回弹进行数值模拟,分析了波形片回弹前与回弹后的应力分布,研究了模具间隙及板料厚度对波形片回弹后成形高度的影响。模拟分析表明,波形片弯曲成形的圆角处变形比较剧烈,其应力值较其他区域值更大,且回弹后应力值的减小使得板料发生回弹,而回弹使得波形片成形高度降低,从而影响离合器从动盘总成的弹性;波形片的成形高度随着模具间隙的增大而减小,而随着板料厚度的增加而增大。试验结果表明,当板料厚度分别为0.6和0.8mm时,试验值与模拟值的误差变化范围分别为5.44%~7.54%和4.52%~5.93%,模拟结果与试验结果取得较好的吻合性。
Taking a clutch corrugated sheet as the research object, the finite element software Dynaform was used to simulate the forming springback of the corrugated sheet. The stress distribution before and after rebound of the corrugated sheet was analyzed. The effects of die gap and sheet thickness on the waveform Impact of sheet forming height after rebound. The simulation results show that the bending deformation of the corrugated sheet is rather severe and its stress value is larger than that of other regions. The reduction of stress after rebound causes the sheet to rebound, while the rebound makes the corrugated sheet forming height Which will affect the elasticity of clutch driven disc assembly. The forming height of corrugated sheet decreases with the increase of mold clearance and increases with the increase of sheet thickness. The experimental results show that when the sheet thickness is 0.6 and 0.8mm respectively, the error range between the experimental value and the simulated value is 5.44% ~ 7.54% and 4.52% ~ 5.93%, respectively. The simulation results are in good agreement with the experimental results .