Method and device for determining the contact condition of circular cutting edge tool based on cutting force

Abstract

The present invention provides a method and device for determining the contact condition of a circular cutting edge tool based on cutting force. The method includes: Step 1. Establishing a geometric model of the dead zone in the cutting process of the circular cutting edge tool, describing the contact behavior and contact nodes at the circular cutting edge; Step 1- 1. In the cutting process of the circular edge tool, describe the complete plowing process, and establish the dead zone geometric model; step 1-2. Determine the key contact node S 1 , S 3 The position of ; Step 1‑3. Determine the contact node S 2 Contact features at the position; Step 2. Establish cutting force model based on contact behavior; Step 2-1. Establish contact stress distribution model based on contact nodes; Step 2-2. Establish cutting force model based on contact stress; Step 3. Based on cutting force The data determine the unknown parameters of the cutting model; Step 3. Determine the unknown parameters of the cutting model based on the cutting force data. The invention solves the problem that the cutting force model ignores the cutting edge radius, and can accurately and effectively determine the real contact condition of the circular cutting edge tool.

Description

technical field [0001] The invention belongs to the field of metal high-precision machining, and in particular relates to a method and a device for determining the contact condition of a circular cutting edge tool based on cutting force. [0002] technical background [0003] In the field of high-precision machining and difficult-to-machine material processing, excessive cutting force and cutting heat lead to excessive wear of the tool, which reduces the life of the tool and damages the surface quality of the workpiece. The introduction of the circular edge of the tool can effectively reduce the wear of the tool, and since scholars proposed the plowing effect in the machining process in 1960, the mechanical and thermal modeling and simulation of the cutting process considering the circular edge has been a hot and difficult point in cutting research. [0004] Some scholars are committed to defining the shearing and plowing of workpieces from the perspective of material deforma...

AI Technical Summary

Problems solved by technology

However, it is impossible to establish a suitable normal stress model in the case of circular contact, and it is always a research problem to accurately determine the contact situation of circular cutting tools

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