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2024-02-20
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倒角是机械工程上的术语，为了去除零件上因机加工产生的毛刺，也为了便于零件装配，一般在零件端部做出倒角。我们生活上倒角处处可见，手机边框上、钢化门上、花瓶上等等。
一般倒角的作用是去除毛刺，使之美观。但是对于图纸中特别指出的倒角，一般是安装工艺的要求，列如轴承的安装导向，还有一些圆弧倒角（或称为圆弧过渡）还可以起到减小应力集中，加强轴类零件的强度的作用。此外，还可以使装配容易，一般在加工结束之前进行。
在农机零件上，特别是圆形配件和圆孔的端面往往加工成45°左右的倒角。这些倒角具有多方面的功能，在维修作业中一定要认真进行查看，并且充分加以利用，否则会给农机维修带来许多困难，甚至引发意想不到的故障。如在螺栓等小零件成型工艺之前，也会进行倒角，为的是料方便进入成型模。
轴承倒角有什么作用
1、轴承钢在进行热处理前粗加工时必须有倒角，这样对于材料的热处理时，应力的释放，内部组织结构重新分布，不易出现裂纹，减小变形都是有非常重要的作用。倒角可以解决应力集中的问题。
2、倒角去毛刺，使产品不锋利，不会割伤使用者。
3、装配时起导向定位作用。
通常轴承的外圈外倒角和内圈的内倒角均为圆角，除有效的避免接触应力主要的就是方便安装。圆角可以保证很好的过渡性装入。
特别是轴承过程中，相配合的轴和轴孔的定位面，也就是轴肩和轴承座挡肩部分，此部位的倒角大小直接影响轴承能否正确安装到位。
从上图我们可以看出轴承装入轴箱和轴之间，其倒角均比轴承箱与轴肩的倒角要大，轴承的倒角必须比这个圆弧大才能保证轴承贴合到轴向定位面。
如上图所示当轴承倒角小于轴承箱与轴肩倒角时，无法装配到位，容易造成轴承倒角处应力集中，装配倾斜，其他配合零件无法匹配等一系列问题。
因此轴承在装配过程中必须充分考虑倒角的配合。
（来源：机械工程文萃）
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Hangzhou Jingzhou Bearing Co.,Ltd.
Address：Liangzhu Indystrial City Hangzhou
Service hotline：0571-88777186 88777665
Jiangsu Jingzhou Bearing Co., Ltd.
Address：No.19, Yulan Avenue, Xuyi Economic DevelopmentZone, Huai’an City, Jiangsu Province
Service hotline：0517-80817777
Website：www.jzbearing.com
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