Complicated surface cutting force prediction method and parameter adjustment and tool path planning method

Abstract

The invention discloses a complicated surface cutting force prediction method and a method for performing parameter adjustment and tool path planning by use of the prediction method, and both the methods have generalizability and can be used for effectively reducing the model core parameter computation complexity and improving the effectiveness of an established complicated surface cutting force prediction model. The prediction method comprises the following steps: dividing a cutter-workpiece contact area into a type I only containing a cutter tip arc-shaped edge area and a type II containing a cutter tip arc-shaped area and a main cutting edge area according to the condition whether the outline of a to-be-processed surface is intersected with the arc-shaped edge or not; as for the type II containing the cutter tip arc-shaped area and the main cutting edge area, computing the total area of a cutting layer, the total length of the contact edge, the cutting layer area of the cutter tip arc-shaped edge area, the length of the contact edge and the direction angles of friction forces, obtaining correlation model parameters of the main cutting edge area by use of a subtractive method and weighting the direction angles of friction forces of the two areas, thereby obtaining the total friction force direction angle; as for the type I only containing the cutter tip arc-shaped edge area, computing the model parameters of the cutter tip arc-shaped edge area; substituting the computed model parameters into a cutting force theoretical model, thereby obtaining a cutting force predicted value.

Description

technical field [0001] The invention relates to the technical field of cutting force prediction, in particular to a method for predicting the magnitude of cutting force during complex surface turning, and a method for parameter adjustment and tool path planning using the prediction method. Background technique [0002] The processing profiles of modern mechanical products are mostly complex profiles and require one-time processing. Due to the drastic changes in cutting force, it is easy to cause workpiece deformation and accelerate tool wear and damage, which is not conducive to production automation. Therefore, the establishment of a cutting force prediction model suitable for complex surface turning can calculate the cutting force according to different cutting parameters in the process of part process decision-making, so as to warn the situation of large cutting force and adjust the cutting parameters or process. Revise. [0003] In the past, the modeling and prediction ...

AI Technical Summary

Problems solved by technology

However, the existing methods for calculating the model parameters (cutting layer area and contact edge length, etc.) of the theoretical model of cutting force are mostly simple analytic geometric methods. For complex surface turning, there are many types of tool-workpiece contact areas that need to be distinguished by this method. Moreover, it is very complicated to calculate the irregular geometric area, so it is impossible to establish a unified prediction model

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