Sliding guide rail is commonly used in the workbench or bed guide rail of various machine tools, mostly workbench, sliding table, skateboard, guide shoes, headstock and so on. The cross section of the guide rail is rectangular, dovetail, V-shaped, circular and so on. In heavy machinery, several cross-sectional shapes are often used in combination, and * * * plays a guiding and supporting role. The rolling guide rail is a rolling body, such as a ball, roller, needle roller or rolling bearing, placed between the moving part and the supporting part. The advantages of the rolling guide rail are: the friction coefficient is smaller than that of the sliding guide rail110, the difference between the static friction coefficient and the dynamic friction coefficient is small, the crawling phenomenon is not easy to occur, it can be dragged by a low-power motor, the positioning accuracy is high, and the service life is long.
Definition of rolling guide rail:
At present, the final unit design between the slider and the slide rail makes the linear slide rail bear loads in all directions at the same time. Patented reflux system and simplified structural design make the linear slide rail move more smoothly and with low noise. The rolling guide rail is especially suitable for occasions where the working parts of machine tools require uniform movement, sensitive action and high positioning accuracy.
Classification of rolling guide rail:
According to whether the rolling guide rail is pre-tensioned, the rolling guide rail can be divided into pre-tensioned and non-pre-tensioned.
The advantage of preloading is to improve the rigidity of the guide rail, which is suitable for the guide rail with large overturning moment and vertical direction. This kind of guide rail is usually used in the coordinate axis of CNC machine tools.
Non-pretensioned rolling guide rail is often used in conveying mechanisms such as manipulator and tool magazine of CNC machine tools.