Kinematic transformation based grinding machining method for numerically controlled grinding wheel

Abstract

The invention discloses a kinematic transformation based grinding machining method for a numerically controlled grinding wheel, which comprises the following steps of: generating an initial grinding wheel machining path and performing discretization treatment to produce a plurality of discrete points; selecting position points within the range of movement of a driving shaft of a grinding wheel rack, and meshing to produce a plurality of cube mesh units based on the position points; finding the cube mesh units respectively comprising the discrete points, and then calculating the volume error vectors of the discrete points in the mesh units; utilizing the volume error vectors to convert each discrete point, and then producing a plurality of new discrete points; and producing a new grinding wheel machining path by a fitting method and performing the corresponding grinding treatment. The invention also discloses an improvement on calculation of volume error vectors and a point compression processing mode. Through the method, the deviation between the actual grinding trajectory and the ideal grinding trajectory caused by the kinematic properties and geometry error of the numerically controlled grinder can be reduced, and the geometric accuracy and dimensional accuracy of machining can be correspondingly improved.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and more specifically relates to a numerical control grinding wheel grinding method based on kinematics transformation. Background technique [0002] In the CNC grinding wheel grinding process, common processing methods include mechanical imitation shape grinding, full CNC grinding without templates, real-time interpolation technology, grinding wheel dressing and compensation, etc. However, for the CNC grinding method of the prior art, there are still the following defects: due to the kinematic characteristics and geometric errors of the CNC grinding machine itself, it is easy to cause a discrepancy between the actual trajectory of the grinding point and the ideal trajectory of the grinding wheel during the grinding process. Large deviation, and directly lead to the problem that the geometric accuracy and dimensional accuracy of the processed workpiece are reduced. [0003] In the patent lit...

AI Technical Summary

Problems solved by technology

However, for the CNC grinding method of the prior art, there are still the following defects: due to the kinematic characteristics and geometric errors of the CNC grinding machine itself, it is easy to cause a discrepancy between the actual trajectory of the grinding point and the ideal trajectory of the grinding wheel during the grinding process. Large deviation, and directly lead to the problem of the reduction of the geometric accuracy and dimensional accuracy of the processed workpiece

[0004] However, the above methods do not consider the influence of the CNC grinding machine based on its own kinematic characteristics and geometric error deviation on the geometric accuracy and dimensional accuracy of the workpiece.

Therefore, the problem of motion deviation of the grinding point cannot be effectively solved, and there is a need for further improvement in order to improve the quality of the grinding process

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