Turning flutter cutting parameter optimization method and system based on workpiece deformation

Abstract

The invention discloses a turning flutter cutting parameter optimization method and system based on workpiece deformation. The method comprises the following steps of: 1) establishing a workpiece-tool turning flutter model; and (2) obtaining limit cutting width and stable cutting width through a turning flutter stability diagram. 3) establishing an objective function by using the machining cost of a machine tool, the machining quality of a workpiece and cutting efficiency, establishing a constraint equation by using the surface quality of the workpiece, the power of the machine tool and the service life of a cutter, and performing particle swarm optimization by using back engagement, the revolution of a main shaft and a feed amount as optimization parameters; and 4) carrying out linear transformation stable cutting width iterative solution to obtain an optimal cutting parameter. According to the method, the deformation problem in workpiece machining is considered, the problem that selected turning machining parameters at present are conservative can be solved, the machining efficiency is improved, the workpiece surface machining quality is improved, and meanwhile the flutter problem caused by adopting improper cutting parameters is avoided.

Description

technical field [0001] The invention belongs to the technical field of machine tool dynamics, and relates to a method and system for optimizing cutting parameters of turning chatter based on workpiece deformation, and specifically relates to a particle swarm algorithm with constraints and dynamic modeling of turning chatter. Background technique [0002] During machining, chatter during turning will seriously affect the quality of the machined surface, and at the same time have a negative impact on the machine tool. The periodic relative motion between the tool and the workpiece will increase the surface roughness of the workpiece, and the periodic dynamic cutting force will be generated during the machining process, which will cause tool fatigue, cause accelerated wear of the machine tool and fixture, make it lose precision, and cause turning chatter It will generate serious noise and endanger the health of the operator. In order to avoid turning chatter, operators usually...

AI Technical Summary

Problems solved by technology

[0009] In view of the conservative selection of machining parameters in the current turning process, the selection of cutting parameters takes a long time, the machining capacity of the machine tool cannot be fully utilized, and turning chatter occurs during machining. This invention proposes a turning chatter based on workpiece deformation. A vibration cutting parameter optimization method and system, the method establishes a corresponding turning chatter model through the machine tool turning system and considers the deformation of the workpiece to obtain the limit cutting width and stable cutting width in the chatter stability diagram of the machine tool, and uses the particle swarm with constraints The optimization algorithm optimizes the cutting parameters. Through the optimal cutting parameters, the problems of conservative parameter values ​​in the current turning process, long time-consuming selection of cutting parameters and low processing efficiency can be improved, and chatter vibration in the processing process can be avoided. Improve turning efficiency and save processing time

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