A method for predicting milling force in slot machining based on material plastic constitutive

Abstract

The invention discloses a method for predicting the milling force of slot machining based on material plastic constitutive, comprising the following steps: step 1, determining the milling position under cylindrical coordinates according to the geometric structure of the cutting edge of the milling cutter and the machining geometric parameters used in the high-speed milling test The milling force acting on the cutting edge at θ, step 2, the milling force model (1) in cylindrical coordinates is transformed into the milling force component in the Cartesian coordinate system, step 3, from the oblique cutting force model, according to the cutting process geometric parameters Determine the shear force coefficient in the milling force model (4). The introduced material constitutive model and cutting force prediction model have general versatility and are suitable for slot milling of all materials. The milling force model of thermal-mechanical coupling effect is applied, and the impact of different milling cutter geometries on milling shear force and plowing is comprehensively considered. The effect of force provides the reliability of milling force prediction, solves the lack of intrinsic variables related to material properties, and does not have universality.

Description

technical field [0001] The invention belongs to the technical field of slot milling, and in particular relates to a method for predicting slot machining and milling force based on material plastic constitutive structure. Background technique [0002] The milling force is related to the energy consumption and the deformation of the milling process system during the cutting and milling process, and has a direct impact on the quality of the machined surface, tool wear and damage, etc. It is an important parameter for studying the cutting performance of materials under high-speed cutting. Compared with the normal cutting state, the deformation and temperature history of the material are significantly different, so the cutting force also shows a different change trend. Under high-speed cutting conditions, the processing rate is high and the heating rate is fast, resulting in small friction coefficient and flow stress. , the chip deformation coefficient is reduced, so in the model...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for predicting the milling force of groove processing based on material plastic constitutive, so as to solve the problem of lack of internal variables related to material properties and lack of versatility in the prior art

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