In the use of linear guides, what factors will affect the service life of linear guides? There are many factors affecting the service life of linear guides, most of which are influenced by external factors.

　　所谓外在因素是指安装拆卸、维修保养、工作环境等方面，在进行直线导轨的安装拆卸时，一定要遵循各种安装要求和注意事项来严格操作。工作情况状态下，大部分的影响主要是来源于直线导轨的磨损，机加过程中的铁削，不定期加油脂、大量的粉尘等都会使直线导轨在运转过程中，造成一定的损害，从而缩短直线导轨的使用寿命。

　　The so-called external factors refer to the installation and disassembly, maintenance, working environment and other aspects, in the installation and disassembly of linear guide, we must follow a variety of installation requirements and precautions to strictly operate. Under the working condition, most of the influence mainly comes from the wear and tear of the linear guideway, iron cutting in the process of machine adding, irregular grease adding, a large amount of dust and so on, which will cause certain damage to the linear guideway in the operation process, thus shortening the service life of the linear guideway.

　　使用的时候注意维护直线导轨、滚珠丝杆表面的干净，定期加油脂，附着在表面的渣滓。

　　When using, pay attention to maintaining the surface of straight line guide and ball screw, regularly add grease to remove the dregs attached to the surface.

　　直线导轨热点校直必须注意的几个问题

　　Several Problems Needing Attention in Hot Spot Straightening of Linear Guideway

　　（1）热点校直必须在回火后进行，不允许在淬火后立即进行。这是因为淬火内应力很大，热点校直时易造成开裂。

　　(1) Hot spot straightening must be done after tempering, not immediately after quenching. This is because the internal stress of quenching is very large, hot spot straightening is easy to cause cracking.

　　（2）不允许在热点直校处进行反复热校，这样校正一方面效果不大，另一方面也易引起开裂。

　　(2) Recurrent thermal calibration is not allowed in the hot spot direct calibration office. This calibration has little effect on one hand, and on the other hand, it is easy to cause cracking.

　　（3）热点校正过的工件不宜进行发黑处理，这是因为发黑前要经过酸洗，而浸酸发黑后常常在热点区引起裂纹。

　　(3) The workpiece corrected by hot spot should not be blackened because it needs pickling before blackening, and cracks often occur in hot spot after pickling and blackening.
                          

　　直线导轨采用整体淬火方法，利用马氏体阳变过程中存在的相变超塑性效应，实施热压定型淬火加反向预弯夹正回火相配合的处理方法可获得良好的减少变形效果。已采用此法成批处理出完全合格的零件。实践证明，此工艺方法是稳定、可靠的。

　　Linear guideway adopts whole quenching method. By utilizing the transformation superplasticity effect in martensite positive transformation process, the combination of hot pressing quenching and reverse pre-bending clip normalizing and tempering can achieve good deformation reduction effect. Completely qualified parts have been processed in batches by this method. Practice has proved that the process is stable and reliable.