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Various aspects of linear guides

The information comes from:互联网 posted on:2021-06-22

Linear rolling guides are used in a wide range of applications in CNC machine tools and automation equipment. Linear bearings are mainly used in automated machinery, such as machine tools imported from Germany, bending machines, laser welding machines, etc. Of course, linear bearings and linear axes are used together. Compared with the sliding guide rail used in ordinary machine tools, it has the following characteristics:
First, high positioning accuracy, easy to obtain high walking accuracy
Rolling the linear guide reduces the coefficient of friction to 1/50 of the sliding guide. Since the coefficient between the dynamic friction and the static friction is small, the movement is flexible, and the driving torque is reduced by 90%. Therefore, the machine positioning accuracy can be set to the ultra-micron level.
Second, the total cost is low, which reduces the cost of the machine tool, which in turn greatly saves electricity and saves energy.
Machines that use linear rolling guides are particularly suitable for repeated starting and stopping reciprocating motions due to their reduced frictional resistance, enabling miniaturization of required power sources and power transmission mechanisms, reducing weight, and reducing the power required by the machine tool by 90 %, with significant energy savings.
Third, it can achieve high-speed movement without gaps
Due to the small frictional resistance, the linear rolling guide has less heat generation performance and can realize high-speed movement of the machine tool, thereby improving the working efficiency of the machine tool by 20 to 30%.
Fourth, long-term maintenance of high precision machine tools
For the fluid lubrication of the sliding guide surface, due to the floating of the oil film, the resulting movement accuracy error cannot be avoided. Therefore, in most cases, fluid lubrication is limited to the boundary area. Direct friction caused by metal contact is unavoidable. In this friction, most of the energy is wasted by frictional losses.
On the contrary, the rolling contact has low energy consumption due to friction, and the friction loss of the rolling surface is correspondingly reduced, so that the linear rolling guide system can be in a state of high precision for a long period of time. At the same time, because the use of lubricants is also relatively small, in most cases, only need to be grease lubrication is sufficient, which makes the machine's lubrication system design and use of maintenance has become very simple.
Fifth, high rigidity in all directions
The sliding gap between the slider and the guide rail is mainly a micro gap or a negative gap, so the overall rigidity and motion accuracy of the rail can be greatly improved.
Sixth, the allowable load is large
The slider and the guide rail are closely combined to form a large whole body, which has large rigidity and four directions and the like, and thus has a large load carrying capacity. Better highlight performance applications to take advantage of its trending capabilities.
Seventh, the maintenance is simple and convenient, the operation is strong, the plasticity is high, and the best choice for industrial automation.
Eighth, high efficiency of mechanical design
Due to the elastic deformation of the ball in the rolling linear guide and the absorption error of the mounting surface, the flatness requirement of the base surface of the guide rail is reduced, and the processing cost of the machinery industry is reduced.
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