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导轨丝杠的安装的正确方式是什么?

来源:http://www.jngongrun.com/ 日期:2021-01-21 发布人:

数控机床的进给系统要获得较高的传动刚度,除了加强滚珠丝杠螺母本身的刚度之外,导轨丝杠正确的安装及其支承的结构刚度也是不可忽视的因素。

In order to obtain higher transmission stiffness for the feed system of CNC machine tools, in addition to strengthening the stiffness of the ball screw nut itself, the correct installation of the guide screw and the structural stiffness of its support are also factors that can not be ignored.
螺母座、丝杠端部的轴承及其支承加工的不精确性和它们在受力之后的过量变形,都会对进给系统的传动刚度带来影响。因此,螺母座的孔与螺母之间必须保持良好的配合,并应保证孔对端面的垂直度,在螺母座上应当增加适当的筋板,并加大螺母座和机床结合部件的接触面积,以提高螺母座的局部刚度和接触刚度。
The inaccuracy of the machining of the bearing and its support at the end of the nut seat and the lead screw and their excessive deformation after being forced will affect the transmission stiffness of the feed system. Therefore, it is necessary to keep a good fit between the hole of nut seat and the nut, and ensure the perpendicularity of the hole to the end face. Appropriate ribs should be added on the nut seat, and the contact area between the nut seat and the machine tool joint parts should be increased, so as to improve the local stiffness and contact stiffness of the nut seat.
导轨丝杠
导轨丝杠的不正确安装以及支承结构的刚度不足,还会使滚珠丝杠的使用寿命大为下降。为了提高支承的轴向刚度,选择合适的滚动轴承。
The improper installation of the guide screw and the insufficient stiffness of the supporting structure will also greatly reduce the service life of the ball screw. In order to improve the axial stiffness of the support, the appropriate rolling bearing is selected.
导轨丝杠螺母副仅用于承受轴向负荷,径向力、弯矩会使滚珠丝杠螺母副附加表面接触应力等负荷,从而可能造成丝杠的性损坏。正确的安装是有效维护的前提。
The guide screw nut pair is only used to bear axial load. Radial force and bending moment will cause additional surface contact stress and other loads on the ball screw nut pair, which may cause permanent damage to the screw. Correct installation is the premise of effective maintenance.
安装时用芯轴和定位套将两端支承轴承座及中间丝母座连接在一起校正、用百分表将芯轴轴线与机床导轨找正平行并芯轴传动自如轻快。
During the installation, the supporting bearing blocks at both ends and the intermediate screw block are connected together with the mandrel and positioning sleeve for correction, and the mandrel axis is aligned and parallel with the guide rail of the machine tool with the dial indicator, and the mandrel drives freely and quickly.

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