Analyzing and modelling method of milling force of flat spiral end milling cutter

Abstract

The invention relates to an analyzing and modelling method of milling force of a flat spiral end milling cutter. According to the method, workpiece material characteristics, cutter geometry, cutting conditions and milling modes serve as model input parameters, consideration is given to the influence on the cutting force by a cutter cutting edge radius, a variable sliding friction coefficient and cutter bounce, shear flow stress is calculated through a Johnson-Cook constitutive model in a model, each cutting edge of the milling cutter is scattered into multiple microelements in the cutter axis direction, the cutting characteristic of each microelement is equivalent to an inclined cutting process, cutting force exerted on each cutting microelement is obtained through an analytical model of inclined cutting force, then cutting force of all the cutting microelement is superposed, and a milling force value of the milling cutter is obtained. According to the analyzing and modelling method of the milling force of the flat spiral end milling cutter, cutting mechanism, relevant stress, strain and a strain rate in the cutting process and the distribution situation of the temperature can be reflected truly, the milling force can be quickly predicted only by inputting the cutting conditions and workpiece characteristic parameters, and the method is high in accuracy and rapidity.

Description

Technical field [0001] The invention relates to a numerical control processing technology, in particular to a milling force analytical modeling method of a flat-bottomed spiral end mill. Background technique [0002] Milling force is one of the important physical quantities that characterize the characteristics of the cutting process. By modeling and simulating the milling force, it is possible to predict in advance the possible overload and deformation during machining. Precise milling force prediction can optimize machining stability and cutting parameters. , Error compensation and control, and part surface integrity are of great significance. [0003] The main methods of milling force modeling are: empirical method, mechanical method, and numerical method. The empirical method mainly uses a large amount of cutting experiment data, through the theory of probability statistics and regression analysis, and applies the orthogonal regression test of these cutting parameters to fit t...

AI Technical Summary

Problems solved by technology

But its existing problems are: the calculation process is time-consuming; the production of the grid is quite difficult and time-consuming; the core algorithm is difficult to master and modify for the general, which is not conducive to in-depth research on the cutting mechanism

Existing modeling methods are time-consuming and require cumbersome calibration for various cutting conditions and tool / workpiece combinations

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