Grinding wheel discrete element modeling method with consideration of abrasive particle shape and distribution randomness

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, and belongs to the research of modeling method of the grinding wheel. Background technique [0002] The research of grinding process mechanism is an important basic subject for the development of grinding process technology. Grinding can be regarded as the cutting process of a single abrasive grain in the microscopic view. Due to the large number of abrasive particles on the surface of the grinding wheel, the shape, size, position, and randomness of the cutting edge, the high-speed movement of the grinding wheel and the changes in grinding process parameters, the grinding process becomes extremely complicated. [0003] With the development of computer technology, simulation technology is gradually introduced into grinding research. Its powerful description ability for strong dynamic pro...

AI Technical Summary

Problems solved by technology

From the literature and patents that have been mastered, there have been examples of granulating grinding wheels using discrete element methods. The patent (application publication number: CN 106903623 A) discloses a granulating grinding wheel using discrete element Modeling method, but the shape and size of the abrasive particles 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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