A Discrete Element Modeling Method for Grinding Wheels Considering the Randomness of Abrasive Grain Shape and Distribution

Abstract

The invention provides a grinding wheel discrete element modeling method with consideration of the abrasive particle shape and distribution randomness. The grinding wheel discrete element modeling method comprises the following main steps: (1) establishing a square calculation area and generating closely-arranged particles inside the square calculation area; (2) defining two big concentric circlesat the center of the square, defining the internal circle as the outline of an adhesive body, and defining the area between the internal circle and the external circle as an abrasive particle distribution area; (3) defining two small concentric circles which comprise random polygons; (4) grouping the particles, defining the particles in the polygons as an abrasive particle group, and defining theparticles in the internal circle of the big concentric circles as an adhesive body group; (5) removing the particles outside the abrasive particle group and the adhesive body group; and (6) selectinga suitable contact model and establishing a two-dimensional grinding wheel discrete element model. According to the grinding wheel discrete element modeling method provided by the invention, the sizes and shapes of abrasive particles on the surface of a grinding wheel as well as the randomness of mutual positions among the abrasive particles are sufficiently considered, so that the actual surfaceappearance of the grinding wheel can be represented more truly and vividly.

Description

technical field [0001] The invention relates to a two-dimensional grinding wheel discrete element modeling method considering the shape of abrasive grains and the randomness of their distribution, which belongs to the research on modeling methods of grinding wheels. Background technique [0002] Grinding mechanism research is an important basic subject for the development of grinding technology. Grinding can be regarded as the cutting process of a single abrasive particle microscopically. Due to the large number of abrasive grains on the surface of the grinding wheel, the shape, size, and position of the cutting edge are random and diverse, the high-speed movement of the grinding wheel, and the changes in grinding process parameters make the grinding process extremely complicated. [0003] With the development of computer technology, simulation technology is gradually introduced into grinding research. Its powerful ability to describe strongly dynamic processes is just sui...

AI Technical Summary

Problems solved by technology

According to the documents and patents that have been mastered, there are existing examples of using the discrete element method to carry out granulation of the grinding wheel. Modeling method, but the shape and size of the abrasive grains established in the method are regular, and the position is evenly distributed, which cannot more realistically represent the surface morphology of the actual grinding wheel

In order to solve the above problems, the present invention provides a two-dimensional grinding wheel discrete element modeling method considering the randomness of the shape of abrasive particles and their distribution. The generated abrasive particles have random shapes and realize random distribution in the radial and circumferential directions. , effectively addressing the deficiencies of the reported modeling methods

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