Numerical-control machine tool magnetic suspension linear feeding system

Abstract

The invention relates to new type numerically controlled machine tool magnetic suspension feeding system. It includes engine base, two guide rails, linear motor stator part, four pairs of differential action suspension electromagnets, two pairs guide electromagnets, linear motor mover part, optical grating measuring system, and support device. The control system of the invention adopts clearance control system between DSP main controller suspension electromagnet, guide electromagnet, and the guide rail, and linear motor servo control system. Thus the invention can eliminate platen no touch support and guide, remove frictional wear, increase feed speed and positioning accuracy, supply enough bearing capacity and thrust, can be used in practical processing.

Description

technical field [0001] The invention relates to a feeding system of a numerically controlled machine tool, which is supported and guided by a magnetic force and driven by a linear motor, and can realize high-speed, high-acceleration, and high-precision frictionless feeding of a machine tool workbench. Background technique [0002] The traditional machine tool feed system contains many intermediate transmission links, the inertial mass of the whole system is large, and the dynamic performance of the system is poor. Moreover, the elastic deformation, friction and wear, and backlash of the intermediate link during the movement will cause hysteresis and nonlinear errors in the positioning and feeding movement, which will affect the machining accuracy. In addition, the inherent defects of the screw drive make it difficult for the table to achieve high feed speed and accuracy. [0003] In order to improve the feed speed, acceleration and positioning accuracy of the machine tool w...

AI Technical Summary

Problems solved by technology

[0007] The Changchun Institute of Optics, Fine Mechanics and Physics of the Chinese Academy of Sciences discloses an ultra-precision micro-displacement guide rail magnetic levitation method and its device in the patent document CN1214892C, but this patent only uses two electromagnets to generate the levitation force, so the mobile platform rotates along the horizontal The degree of freedom is not limited, so it becomes unstable; in this patent, the two electromagnets used to generate the levitation force also play a guiding role, and decoupling control must be performed, which increases the complexity of the control system; the patent used The linear motor has a unilateral stator structure, and there is a unilateral magnetic pull between the linear motor stator and the mover, which causes a great burden on the mobile platform

[0008] Shanghai University discloses an industrial application type active magnetic levitation guide rail linear motor feed platform in patent document CN1244432C, but the fixed part in this patent is a simply supported beam structure supported at both ends, with poor rigidity, easy deformation, and low load-carrying capacity. Poor; the linear motor in this patent has a bilateral mover structure, and both sides of the mover are fixed on the moving parts, which increases the useless weight of the moving parts

Images