High-precision low-friction magnetic suspension sliding composite guid rail

Abstract

The high-precision low-friction maglev-sliding composite guide rail is characterized in that between the bottom end surface of the moving part and the support surface of the guide rail, the bottom permanent magnet pair is oppositely installed with the same sex, and the repulsive force is formed to keep the bottom end surface of the moving part and the support surface of the guide rail in a non-polar position. Contact state, and form a positive pressure between the moving part and the top guide surface of the guide rail; take the side end surface of the moving part and the guide rail as the side guide surface, and on the other side end surface opposite to the side guide surface, The side permanent magnet pair is oppositely installed with the same sex, and the repulsive force formed by the side permanent magnet pair keeps the moving part and the guide rail in a non-contact state on the side end surface, and forms a positive pressure on the side guide surface. The invention combines the sliding guide rail with the magnetic levitation guide rail, and has the advantages of simple structure, high precision and low friction.

Description

Technical field: [0001] The present invention relates to motion guides, more particularly guide rails. Background technique: [0002] The performance of processing machinery and length measuring instruments are inseparable from the characteristics of guide rails. Modern machine tools and high-precision instruments require guide rails to meet fast motion and high-precision positioning. The traditional sliding guide has a simple structure, good rigidity and strong bearing capacity, but due to the large friction coefficient, it has high requirements for lubrication, large energy consumption and limited movement speed; the traditional rolling guide has small friction coefficient, small heat generation and long life. Long, but poor rigidity, low bearing capacity, difficult to achieve high guiding accuracy and motion stability, and easy to generate vibration and noise at high speed; air-bearing guide rails have developed rapidly in recent years, and their friction, noise and vibra...

AI Technical Summary

Problems solved by technology

The traditional sliding guideway has simple structure, good rigidity and strong bearing capacity, but due to the large friction coefficient, it has high requirements for lubrication, high energy consumption, and limited movement speed; the traditional rolling guideway has small friction coefficient, low heat generation and long service life. Long, but poor rigidity, low bearing capacity, difficult to achieve high guiding accuracy and motion stability, and easy to generate vibration and noise at high speeds; air bearing guide rails have developed rapidly in recent years, and their friction, noise, and vibration are very small. High precision, long life, high-speed motion, no need for lubrication, but low load capacity, complex structure, high production cost, cannot be used in a vacuum environment, and the interference of the exhaust air flow to the measurement system needs to be considered; maglev guide rails have been developed in recent years Another new type of guide rail has a large load-carrying capacity, low friction, noise, and vibration. It has no limit to the running speed and does not need lubrication. When using electromagnets, it has no requirements for the environment, and the motion and system characteristics are adjustable and easy to control. However, the system structure is complex, High production cost, unstable performance, difficult control of guiding precision, and difficult to overcome the influence of electromagnet heating

Therefore, when designing modern machine tools and high-precision instruments, it is difficult to choose any kind of guide rail to meet the requirements of load bearing, high speed or low speed, high stability, high guiding accuracy, and low cost at the same time. the bottleneck

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