Grinding force prediction method and prediction system for cup-shaped grinding wheel curved surface grinding machining

Abstract

The invention belongs to the technical field of curved surface grinding machining, and discloses a grinding force prediction method and prediction system for curved surface grinding machining of a cup-shaped grinding wheel. The method comprises. The method comprises the following steps: obtaining a grinding track l and a grinding contact area S of a single abrasive particle in the curved surface grinding machining process of the cup-shaped grinding wheel; obtaining the grinding depth ap and the critical grinding depth apc of the single abrasive particle in the direction of the grinding track l; obtaining a grinding force model of a single abrasive particle; obtaining the effective abrasive particle number Nact of the total abrasive particle number Nstat in unit area; and calculating the total grinding force of curved surface grinding. According to the method, the predicted value of the tangential force can be obtained at the same time under the condition that the normal force is known;and the grinding force is controlled by changing the grinding parameters. The accurate grinding force prediction method with the accurate calculation result can be used for evaluating the service life of the grinding wheel and has important significance in grinding temperature field analysis. The service life of the grinding wheel for automatic curved surface machining can be monitored.

Description

technical field [0001] The invention belongs to the technical field of curved surface grinding, and in particular relates to a grinding force prediction method and a prediction system for cup-shaped grinding wheel curved surface grinding. Background technique [0002] Currently, the closest prior art: [0003] It is difficult to monitor the grinding force in real time during the automatic grinding process of large curved surface workpieces such as wind power blades and turbine blades, and the grinding force is the most important parameter to explain the grinding process. Today's robot end constant force actuators can only guarantee constant output of one-way force in surface grinding, and cannot simultaneously predict and control the value of other grinding forces in the grinding process. Therefore, a complete and accurate surface grinding process can be established. The prediction method of machining and grinding force is particularly important. In the selection of grindi...

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Problems solved by technology

[0011] (3) In the previous research on the prediction method of grinding force, the statistical method of the number of abrasive grains per unit area in the grinding contact area was not scientific and specific, which made the prediction results of grinding force less consistent with the experimental results;

[0015] (2) It is difficult to analyze the grinding trajectory of a single abrasive particle and obtain the grinding depth at any point

[0016] (3) It is difficult to obtain the number of abrasive grains per unit area of ​​the grinding wheel contact area

[0019] In the past, the research on cup-shaped grinding wheel grinding focused on the plane grinding direction, but there were no relevant results in the research and exploration of the grinding method and grinding force of curved surface grinding. Therefore, a kind of cup-shaped grinding wheel curved surface grinding process provided by the present invention The cutting force prediction method fills the technical gap in this research direction;

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