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Virtual grinding wheel simulation method based on randomly distributed multiple abrasive particles

A technology of random distribution and simulation method, used in design optimization/simulation, special data processing applications, instruments, etc., can solve the problem of low simulation analysis accuracy of single abrasive particle grinding, and achieve the effect of improving calculation accuracy

Inactive Publication Date: 2017-02-22
BEIHANG UNIV
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  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is: by establishing a virtual grinding wheel model based on the random distribution of multiple abrasive grains, the problem of low precision of single abrasive grain grinding simulation analysis is effectively solved, which is helpful for simulating the actual grinding process. The Comprehensive Influence of Multiple Abrasive Grinding on the Workpiece

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  • Virtual grinding wheel simulation method based on randomly distributed multiple abrasive particles
  • Virtual grinding wheel simulation method based on randomly distributed multiple abrasive particles
  • Virtual grinding wheel simulation method based on randomly distributed multiple abrasive particles

Examples

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example 1

[0022] (1) Determination of the average spacing of abrasive grains: Assume that a number of abrasive grains are evenly distributed in a square with a side length of 2l, such as figure 2 As shown, assuming that each small square vertex has one abrasive grain, the number of abrasive grains equivalently distributed on a square with a side length of 2l is 4. If the grain size of the grinding wheel is 120#, the abrasive grain density can be obtained as 40 / mm -2 , Through calculation, the average spacing l of abrasive grains can be obtained as 0.03mm.

[0023] (2) Determination of abrasive grain coordinates: In the modeling process of multiple abrasive grains, in order not to allow the abrasive grains to overlap each other, a virtual grid method can be used, and one abrasive grain is distributed in each grid. The position in the grid is random. The positions of abrasive grains are randomly distributed in each small square of l×l. The side length of the grid is A=474um, which can...

example 2

[0028] The determination of the average spacing and coordinates of abrasive grains in this example is similar to that in Example 1, and only the process of model establishment is described below.

[0029] (1) Take the area on the surface of the diamond grinding wheel as the prototype of the virtual grinding wheel, wherein the particle size of the diamond grinding wheel abrasive grains is 230#, and the abrasive grain density is 127mm as previously measured -2 , The nominal size is in the range of 50-70μm. When modeling, the side length of the hexahedron is taken as 50 μm. The bonding agent is a resin bonding agent whose shape is simplified as a cuboid. The virtual grinding wheel structure model is established by randomly distributing 4×4×1 virtual abrasive grains in the cuboid bond.

[0030] (2) Generation of position and attitude random numbers. Based on the Rnd random function in the VB programming language, in the virtual grid of 4 × 4 × 1, the random coordinate positions...

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Abstract

The invention relates to a virtual grinding wheel simulation method based on randomly distributed multiple abrasive particles. Currently most grinding simulations mainly adopt grinding of single abrasive particle and do not consider the comprehensive influence of multiple abrasive particles on workpiece when the multiple abrasive particles are simultaneously subjected to grinding. In a practical grinding process of the grinding wheel, abrasive particles do not simply exist in a form of the single abrasive particle, instead, multiple abrasive particles are randomly distributed on the surface of the grinding wheel. Therefore, in order to be able to reflect the grinding process of the grinding wheel more truly, a virtual grinding wheel model based on randomly distributed multiple abrasive particles is established. The virtual grinding wheel simulation method based on randomly distributed multiple abrasive particles effectively improves computational accuracy of simulated analysis of the grinding and provides theoretical references for studying the grinding processes of the grinding wheel and the workpiece by using a finite element method.

Description

technical field [0001] The invention relates to a virtual grinding wheel simulation method based on the random distribution of multiple abrasive grains, which is suitable for finite element simulation analysis of grinding wheels and workpieces. Background technique [0002] At present, most grinding simulations focus on single-grain grinding, without considering the comprehensive influence of multiple abrasive grains on the workpiece. In the actual grinding process of the grinding wheel, the abrasive grains do not simply exist in the form of a single abrasive grain, but many abrasive grains are randomly distributed on the surface of the grinding wheel. Therefore, in order to reflect the grinding process of the grinding wheel more realistically, the present invention establishes a virtual grinding wheel model based on the random distribution of multiple abrasive grains. Contents of the invention [0003] The technical problem to be solved in the present invention is: by es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 王延忠刘旸王段李岩
Owner BEIHANG UNIV
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