关于螺丝柱的问题

使用的是1.6的自攻钉，螺柱外径3mm，内径1.2mm。
同一个产品上有六个这个规格的螺柱，但是有一个螺柱在攻螺钉时出现断裂情况（其他5个都没）。
材料为ABS+PC
这是什么情况？
有没有大神给分析一下啊。

wps1029 发表于 2015-1-15 15:40
个人感觉从两个方面入手：1.零件本身 ;a.让模具设计人员做个模流分析，看下应力集中位置;b.检查下与之配合 ...

是啊，修模是最后要考虑的手段了。

loveyong0523 发表于 2015-1-16 10:58
怎么你的螺丝吃合量都做那么大呢？2.0的自攻螺丝塑胶孔做到1.6mm，你问的问题其实更之前那个问题查不多， ...

保守起见，单纯的为了保证固定的强度，就把内径做小了一点

顶下~~

未收录

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过来学习下

加几条骨位，就可以改善，螺丝柱开裂不光是壁厚，材料的问题，有时打螺丝打偏不，或者上下螺丝孔没有对准，也会开裂。

我同样也遇到过此类问题，你从两个方面去入手
  
1.  电批扭力改小，
2.产品壁厚(圆柱加到3.6mm）.

标准螺丝是1.7的
1.6的是非标，
内径做1.3即可，检查爆裂的螺丝柱内径是否偏小

加骨位或加胶就可以了