An accelerated test method for cutter bar fatigue deformation

Abstract

The invention discloses an accelerated test method for fatigue deformation of a cutter bar, which includes: determining the number of axes of fatigue deformation of the cutter bar in the cutting process according to the number of cutter teeth, adopting an equivalent test method of uniaxial sequential vibration, and setting the tool bar at The dynamic load borne during the actual cutting process is equivalent to the static load; calculate the actual load frequency of the cutter rod; establish the cutter rod model in CAD, and import the cutter rod model into the finite element software ANSYS to analyze the failure mechanism of the guaranteed cutter rod The maximum load that can be applied under the same condition, analyze the modal of the cutter bar, determine the magnitude of the applied load and the frequency of the acceleration test; select the loading device and detection device; build a UHF testing machine platform for testing, and determine the The detection device detects the deformation of the tool rod in place, records and analyzes the detection data; establishes the fatigue deformation acceleration model, and draws the fatigue deformation SN curve of the tool rod.

Description

technical field [0001] The invention belongs to the field of tool fatigue life research and relates to an accelerated test method for tool bar fatigue deformation. Background technique [0002] As an essential element of metal cutting, cutting tools are widely used in the field of modern machinery manufacturing. As the direct executor of the cutting process of the machine tool, the tool often works continuously for several hours under harsh working conditions such as high frequency, high speed, high temperature, and impact, which leads to fatigue deformation and failure of the tool bar during the cutting process, and cannot meet the cutting accuracy. In view of this problem, the fatigue test of the cutter bar is carried out to obtain the deformation life curve of the tool bar, which can accurately predict the normal working time of the tool bar, and effectively reduce the economic loss caused by the fatigue deformation failure of the tool bar caused by the machining error of...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems such as the long fatigue test cycle of the cutter bar and the low frequency of the ordinary fatigue testing machine which cannot meet the accelerated test, and provide a method for the accelerated test of the fatigue deformation of the cutter bar, which has strong operability and low cost. The optimized fatigue deformation accelerated test platform can effectively obtain the deformation life curve of the tool holder and predict the failure time of the tool holder

Images