An Accurate Evaluation Method of Robotic Abrasive Belt Grinding and Polishing Efficiency Based on Cutting Force Decomposition Model

Abstract

The invention discloses a robot abrasive belt grinding and polishing efficiency accurate assessment method based on a cutting force decomposition model. The method comprises the steps that firstly, tangential force in the abrasive belt grinding and polishing process is decomposed into the three component force of sliding friction force, ploughing force and cutting force, and a total friction coefficient model and a sliding friction coefficient model of the grinding and polishing process are built; secondly, a ploughing friction coefficient model is built through an abrasive belt grinding particle true geometrical shape; material removing rates under different technological parameter experiment conditions are calculated and measured, and the total friction coefficient under the condition that the material removing rate is zero is obtained through linear fitting; thirdly, the sliding friction force, the ploughing force and the cutting force in the tangential force are derived according to the obtained total friction coefficient; and fourthly, a specific energy model of the specific cutting energy and the three component force during abrasive belt grinding and polishing is built, andthe robot abrasive belt grinding efficiency is calculated. Through the robot abrasive belt grinding and polishing efficiency accurate assessment method provided by the invention, main technological parameters affecting the grinding and polishing efficiency in the robot abrasive belt grinding and polishing process can be assessed more accurately, and the abrasive belt grinding and polishing efficiency can be improved greatly on the basis that energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency and high-precision grinding and polishing of robots, and in particular relates to a method for accurately evaluating the grinding and polishing efficiency of a robot abrasive belt based on a cutting force decomposition model. Background technique [0002] Robot abrasive belt grinding and polishing is a newly developed robot integrated application technology. Compared with traditional manual grinding and polishing and multi-axis CNC machine tool belt grinding and polishing, robot grinding and polishing can give full play to its advantages of good flexibility, low cost, and scalable force control, and is widely used to upgrade aeroengine blades, blisks, Machining accuracy and surface quality of complex curved surface parts such as leaf rings. With the gradual enrichment of the research results of robot grinding and polishing processing of complex surfaces, it can be found that the published...

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Problems solved by technology

In addition, Ma et al. ("Assessment of cutting energy consumption and energy efficiency in machining of 4140 steel", 2014; 74:1701-1708) evaluated the energy consumption and Cutting efficiency, it is found that reducing the cutting edge radius and rake angle will significantly improve cutting efficiency, while cutting speed and tool nose radius have little effect on cutting efficiency, but there is no in-depth discussion on the microscopic cutting force level

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