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滚珠丝杆安装方法？

滚珠丝杆安装方法？

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你爱上了我就要对我负责 07-30 11:04

一端固定，一端自由方式一端固定，另一端自由安装方式，固定端的轴承可以同时承受轴向力和径向力，而滚珠丝杠轴承这种的支承方式主要是用于行程较小的短丝杠轴承或者全封闭式的机床，因为当采用这种结构的机械*方式时，其精度是最不可靠的，尤其是长径比大的丝杠轴承(滚珠丝杠相对细长)，其热变形是非常明显的。但是，如果是1.5米长的丝杠，其在冷、热的不同环境下变化0.05~0.1mm是属于正常正常现象。尽管如此，由于其结构较简单，安装调试较方便，大多高精度机床依然是采用这种结构；但是，有一点需要特别注意的就是，采用这种结构时必须加装光栅，采用全封闭环来反馈，以便能够充分丝杠的性能。一端固定，另一端支承方式一端固定，另一端支承这种安装方式，固定端的轴承同样也是可以同时承受轴向力和径向力，而支承端只承受径向力，并且能够做微量的轴向浮动，以及可以减少或者避免因丝杠自重而出现的弯曲，另外，丝杠的热变形可以自由的向一端伸长。因此，这是使用最广泛的一种结构。比如：目前国内中小型数控车床、立式*中心等等都是采用这种结构两端固定方式丝杠两端均固定。采用这种方式，固定端轴承可以同时承受轴向力，并且可以对丝杠施加适当的预紧力，以提高丝杠的支承刚度，同时还可以部分地补偿丝杠的热变形。因此，大型机床、重型机床以及高精度镗铣床大多都是采用这种结构。当然，其也有不足的地方，那就是采用这种结构的话会使得调整工作比较繁琐；此外，如果在安装调整时两端的预紧力过大的话，将会导致丝杠最终的行程比设计行程长，螺距也会比设计螺距大；而如果两端螺母的预紧力不够的话，就会导致相反的结果，从而容易引起机床振动，致使精度降低。因此，如果是采用两端固定这种结构的话，那么在拆装时一定要严格按照说明书来进行调整，或者是借助仪器(双频激光测量仪)来调整，以免造成一些不必要的损失。