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控制精密弹片回弹的两大办法!
08-21 / 2019

精密弹片在弯曲过程中产生的回弹、怎么办?励高精密模具有两大控制冲压件回弹的办法,小编给予大家参考。


控制精密弹片回弹的方法有两种。一种是过量补偿法,另一种是过程控制方法。根据回弹的趋势,在模具中制造与预期回弹想一致的补偿角,或者是控制冲头过量冲压,这就是所谓的补偿方法。这是一种被广泛运用的控制精密弹片回弹的方法。但是存在复杂造型的弯曲产品和高精度要求时,回弹的精度控制有所局限,因为很难准确的估计回弹量。

改变板材的应力状态第二种办法,过程控制方法被用于控制回弹。通常这个过程包括:
冲压、拉弯、热弯曲。在冲压过程中,板厚方向上的额外应力改变了弯曲变形区域的应力分布状态。通过在精密弹片弯曲处施加一个切向拉伸变形和减小弯矩,这样板料的回弹就得到了控制。


精密弹片

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