Method for cutting thermal simulation calculation in brittle material cutting machining

Abstract

The invention discloses a method for cutting thermal simulation calculation in brittle material cutting machining. The method comprises the following steps that structural parameters of a cutter and material characteristics of a ceramic workpiece are obtained; according to the obtained cutter structure parameters and the material characteristics of the ceramic workpiece, cutter and ceramic workpiece discrete element models conforming to the reality are established in discrete element software; then discrete element simulation of cutting machining of the ceramic workpiece is established by adding conditions such as a heat exchange contact model, the rotating speed of a cutter, the cutting depth and the feeding speed; through discrete element simulation, the mutual coupling effect rule of acutting force-temperature field-stress field during cutting machining of the ceramic workpiece is researched. According to the method, the discrete element simulation technology is used for researching the thermal-mechanical coupling action rule of the ceramic workpiece under the cutting machining condition, and response behaviors such as crack propagation and surface damage occurring under the condition that thermal-mechanical coupling is considered during material cutting machining can be further researched.

Description

technical field [0001] The invention relates to a method for simulation calculation of cutting heat in cutting processing of brittle materials, which belongs to a research method of heat-mechanical coupling modeling in cutting processing. Background technique [0002] The research on cutting machining mechanism is an important basic topic in the development of cutting technology. Many machining technologies (such as grinding, milling, etc.) can be studied as cutting processes at the micro level, but most researchers ignore it when they simulate cutting processes. The influence of cutting heat on the workpiece during the cutting process makes a gap between the simulation process and the actual machining. [0003] Judging from the literature and patents that have been mastered, many researchers use the discrete element method to simulate the cutting and grinding of brittle materials, and the cutting tool is generally treated as a folding wall with high rigidity, or granulated ...

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Problems solved by technology

[0002] The research on cutting machining mechanism is an important basic topic in the development of cutting technology. Many machining technologies (such as grinding, milling, etc.) can be studied as cutting processes at the micro level, but most researchers ignore it when they simulate cutting processes. The influence of cutting heat on the workpiece during the cutting process makes a gap between the simulation process and the actual machining

[0003] Judging from the literature and patents that have been mastered, many researchers use the discrete element method to conduct simulation research on the cutting and grinding of brittle materials, and the cutting tool is generally treated as a folding wall with high rigidity, or granulated modeling , such as the patent (application publication number: CN 109858168A) discloses a calculation method for optimizing the arrangement of abrasive grains on the surface of a grinding wheel based on discrete element simulation, and the patent (application publication number: CN 108687683A) discloses a method that considers the shape of abrasive grains and their Randomly distributed grinding wheel discrete element modeling methods, but these methods ignore the heat generated in the machining process, and cannot truly reflect the impact of cutting heat on the workpiece in the machining process. In order to solve the above problems, the present invention provides a A method for simulation calculation of cutting heat in the cutting of brittle materials. The dynamic temperature field is assigned to the generated discrete element tool model and the initial temperature field is assigned to the discrete element model of the workpiece, so as to realize the thermal analysis of the influence of cutting heat on the workpiece during processing. - Force coupling simulation analysis

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