Optimal selection method for pattern of bonded abrasive grinding disc with phyllotaxis pattern

Abstract

The invention relates to an optimal selection method for a pattern of a bonded abrasive grinding disc with the phyllotaxis pattern. The optimal selection method comprises the steps that firstly, the diameter of the grinding disc, and the optimal selection range for the phyllotaxis parameter of the pattern on the surface of the grinding disc are set; secondly, a graphic primitive type is constructed and the distribution density of abrasive particles on the surface of a graphic primitive is set; thirdly, a digital model of the pattern of the grinding disc with the phyllotaxis pattern and an abrasive particle position information matrix are generated according to an H.Vogel plane phyllotaxis model; fourthly, the digital model is subjected to grinding motion, a workpiece is dispersed into M*N areas, statistics of the abrasive particle scratching densities of all the dispersed areas are made, and the overall evaluation coefficient of the scratching density of abrasive particles on the surface of the workpiece is established and calculated. By repeating the process, the overall evaluation coefficients of all patterns are calculated in sequence, and accordingly the grinding disc phyllotaxis pattern with the minimum overall evaluation coefficient is optimally selected. By adoption of the method, through computer calculation, the experimental cost can be saved, the design efficiency of the phyllotaxis grinding disc pattern is improved, and the design scope of the phyllotaxis grinding disc pattern is extended.

Description

technical field [0001] The invention relates to the field of design and manufacture of grinding discs, in particular to a pattern optimization method of a fixed abrasive phyllotaxy grinding disc based on the coupling of phyllotaxy theory and kinematics. Background technique [0002] Grinding and polishing, as a precision ultra-precision machining method to obtain high surface accuracy and surface quality of the workpiece surface, is widely used in the fields of ceramics, optical crystals and semiconductor substrate material processing. As one of the key consumables in the grinding and polishing process, the fixed abrasive grinding disc has high shape retention and controllability of the trajectory of the abrasive grains. Through reasonable planning and design of the pattern structure on the surface of the grinding disc, the smooth flow of the grinding fluid can be achieved, and the grinding process can be changed. It can improve the particle movement distribution state, prev...

AI Technical Summary

Problems solved by technology

However, not all of these combinations of phyllotaxy parameters α and c are suitable for the preparation of phyllotaxy grinding discs. The reason is that as the phyllotaxy parameters α and c change, the movement of the abrasive on the surface of the phyllotaxy grinding disc to scratch the cutting workpiece also changes. Changes accordingly, affecting the grinding track distribution

The existing methods for optimizing phyllotaxy discs mainly rely on the calculation of limited phyllotaxy parameter combinations. By preparing corresponding phyllotaxic discs and supplemented by a large number of experiments, the optimal combination of phyllotaxy parameters is optimized according to the test results. Sequence parameter combinations are limited, the optimization period is long, the test cost is high, and the optimization range is narrow

Images