Grinding wheel wear real-time compensation method based on numerical control system

Abstract

The present invention discloses a grinding wheel wear real-time compensation method based on a numerical control system. The grinding wheel wear extent is calculated and updated in real time according to the changing of the current of a spindle motor, the second development interface, at an interpolator layer, of the numerical control system is employed to correct G-code theory operation track points according to the real-time updated grinding wheel wear extent so as to realize the real-time compensation of the grinding wheel wear, the correction of the current device mechanical structure is not needed, the corresponding secondary development of the numerical control system is needed to realize the real-time grinding wheel wear compensation, and the device improvement cost is low; because the parameters of a cutter and cutter compensation cannot be frequently corrected so as to greatly improve the grinding processing efficiency and improve the grinding processing precision and the consistency of the polishing effect; the grinding wheel wear real-time compensation method based on the numerical control system combines a matching automatic programming module to be applied to the grinding wheel wear real-time compensation function requirement of different industries and different technology requirements with wide application markets and especially applied to the face profile curve edging field of complex shapes of materials such as stones, ceramics and glass, etc.

Description

technical field [0001] The invention relates to the field of numerical control grinding, in particular to a method for real-time compensation of grinding wheel wear in the edging process based on a numerical control system, which is suitable for special edging equipment, especially in the application field of edging special-shaped flat plates. Background technique [0002] Aiming at the problem that grinding wheel wear leads to the reduction of grinding accuracy during the grinding process, the following three methods of grinding wheel wear compensation are usually used at present: [0003] 1. Use an automatic measuring instrument to directly measure the amount of grinding wheel wear, and then perform grinding wheel wear compensation. This method is an off-line measurement and compensation scheme. It is widely used in the field of high-precision internal and external cylindrical grinding, and is suitable for small grinding wheel wear and grinding. The occasion with high cutt...

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Problems solved by technology

[0003] 1. Use an automatic measuring instrument to directly measure the amount of grinding wheel wear, and then perform grinding wheel wear compensation. This method is an off-line measurement and compensation scheme. It is widely used in the field of high-precision internal and external cylindrical grinding, and is suitable for small grinding wheel wear and grinding. The occasion with high cutting precision, but the cost of this solution is relatively high;

[0004] 2. The self-designed automatic measurement device or grinding force adaptive control device is used to realize the real-time wear compensation of the grinding wheel. This method is an online measurement compensation scheme. The common design schemes include pneumatic control system, electro-hydraulic proportional control system, etc. , this solution usually requires a certain degree of modification of the existing grinding processing equipment, and its practical application is limited to a certain extent;

[0005] 3. For the grinding and polishing of simple linear contour edges, the current method is to read the current of the spindle motor and use the PID control algorithm to control the movement of the feed motor to achieve constant force grinding of linear edges, but this solution cannot be applied to Grinding and Polishing of Complicated Plane and Special-shaped Contour Edge

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