The Practical Installation Method Of Skf Combined Bearing Is Worth Seeing
The Practical Installation Method Of Skf Combined Bearing Is Worth Seeing
2021年12月20日
Final Finishing Steps Of Nsk Precision Bearing
Final Finishing Steps Of Nsk Precision Bearing
2021年12月20日

Installation Form And Stress Analysis Of Linear Guide Bearing

Linear Guide Bearing

Installation form and stress analysis of linear guide bearing

Metal linear bearing is a low-cost linear motion system, which is used for infinite stroke and cylindrical shaft. Widely used in precision machine tools, textile machinery, food packaging machinery, Linear Guide Bearing printing machinery and other industrial machinery sliding parts. There are many brands of linear guide bearing, among which THK, HIWIN and SKF are widely popular.

1. Fixed at one end – supported at the other end

SKF lbct60a-2ls guide rail is fixed at one end and supported at the other end. The fixed end bears both axial force and radial force; The supporting Linear Guide Bearing end only bears radial force and can make a small amount of axial floating, which can reduce or avoid the bending due to the self weight of the guide rail.

At the same time, the thermal deformation of the guide rail can extend freely to one end. This structure is widely used. Linear Guide Bearing At present, this structure is used in small and medium-sized CNC lathes and vertical machining centers in China.

Installation Form And Stress Analysis Of Linear Guide Bearing

2. Fixed at one end – free at one end

One end of the guide rail is fixed and the other end is free. The fixed end lbcf50a-2ls and lm8uu Linear Guide Bearing bearings bear both axial and radial forces. This support method is used for short guide rails with small stroke or full closed-loop machine tools, because the mechanical positioning accuracy of this structure is unreliable,

Especially for the guide rail with large aspect ratio (the linear guide rail is relatively slender), Linear Guide Bearing the thermal denaturation is obvious. It is normal for the 1.5m long guide rail to change by 0.05 ~ 0.10mm in different cold and hot environments. However, due to its simple structure and convenient installation and commissioning, many high-precision machine tools still adopt this structure, but it must be equipped with grating and adopt full closed-loop feedback.

3. Fixed at both ends

Both ends of the guide rail are fixed. Lbcr80a-2ls bearing at the fixed end and shs55v2kkhhc1 + 1260l bearing can bear axial force at the same time. Linear Guide Bearing This support mode can apply appropriate preload to the upper silver guide rail, improve the support stiffness of the guide rail and partially compensate the thermal deformation of the guide rail.

This scheme is often used for large machine tools, heavy machine tools and Linear Guide Bearing high-precision boring and milling machines. However, the adjustment of this guide rail is cumbersome. If the preload at both ends is too large, the final stroke of the guide rail will be longer than the design stroke, and the pitch will be larger than the design pitch.

If the pre tightening force of lock nuts at both ends is not enough, Linear Guide Bearing it will lead to the opposite result, and it is easy to cause vibration of the machine tool and reduce the accuracy. Therefore, such guide rails must be adjusted according to the original manufacturer’s instructions or with the help of instruments (dual frequency laser measuring instrument).

One end of the guide rail is fixed and the other end is free. The fixed end lbcf50a-2ls and lm8uu bearings bear both axial and radial forces. This support method is used for short guide rails with small stroke or full closed-loop machine tools, because the mechanical positioning accuracy of this structure is unreliable,

Especially for the guide rail with large aspect ratio (the linear guide rail is relatively slender), the thermal denaturation is obvious. It is normal for the 1.5m long guide rail to change by 0.05 ~ 0.10mm in different cold and hot environments. However, due to its simple structure and convenient installation and commissioning, many high-precision machine tools still adopt this structure, but it must be equipped with grating and adopt full closed-loop feedback.