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Cutter residual life prediction method considering cutter abrasion loss and surface roughness

A surface roughness and tool wear technology, applied in the field of CNC machining, can solve the problems of single index and inaccurate results, and achieve the effect of reliable tool remaining life and reliable evaluation

Active Publication Date: 2020-11-20
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for predicting the remaining life of a tool considering the amount of tool wear and surface roughness, so as to solve the problem in the prior art that the index for evaluating the remaining life of a tool is single, resulting in inaccurate results

Method used

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  • Cutter residual life prediction method considering cutter abrasion loss and surface roughness
  • Cutter residual life prediction method considering cutter abrasion loss and surface roughness
  • Cutter residual life prediction method considering cutter abrasion loss and surface roughness

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Experimental program
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Effect test

Embodiment

[0080] Step 1. Plane milling experiment

[0081] The experimental instrument uses Jingdiao JDCT1200E_A12S three-axis CNC machine tool to build a tool wear test platform. The workpiece material is 45# steel, the hardness is HRC55, and the size is 70mm*60mm*50mm. The tool is a cemented carbide three-edged flat end mill produced by Chengdu Granite High-tech Materials Co., Ltd. The measuring instrument is the SJ-210 surface roughness meter produced by Mitutoyo Corporation of Japan with a double-column height gauge and a height gauge adapter for measuring the surface roughness of the workpiece. Use Pyersson high-definition USB electron microscope combined with microscope micrometer to measure tool flank wear.

[0082] Carry out the plane milling experiment, the milling method is down milling, and the milling plane is 70*50mm 2 , the milling length of a single stroke is 70mm, and the interval between two measurement points is 50 strokes. The cutting conditions are shown in Table ...

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Abstract

The invention discloses a cutter residual life prediction method considering cutter abrasion loss and surface roughness. The method comprises the following steps: step 1, establishing a single degradation index cutter residual life prediction model; step 2, measuring the wear extent of the rear cutter surface and the surface roughness of the workpiece at the same moment; carrying out first-stage prior estimation of two-stage maximum likelihood estimation on related parameters used for describing differences among cutter individuals and generality of similar cutters in the cutter rear cutter surface abrasion loss degradation model or the workpiece surface roughness degradation model in the step 1; 3, establishing a multi-degradation-index cutter residual life prediction model according to the parameter values obtained through priori estimation in the step 2; and step 4, importing the parameters estimated in the step 2 and the step 3 into a multi-degradation-index cutter residual life prediction model to obtain a cutter residual life prediction result. The problem of inaccurate result caused by single index for evaluating the residual life of the cutter in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of numerical control machining, and in particular relates to a method for predicting the remaining life of a tool in consideration of tool wear and surface roughness. Background technique [0002] As the cutting progresses, the tool wear increases, the surface roughness of the workpiece increases, and the cutting force, cutting heat and vibration may appear abnormal, which means that the part is out of tolerance or the surface is deteriorated. At this time, an index is needed to evaluate the remaining life of the tool in order to support the decision of tool selection or replacement. At present, usually only the flank wear is used as an index to evaluate the remaining life of the tool, that is, when the flank wear of the tool reaches the threshold value, the tool is considered to be invalid. [0003] Surface roughness is an important index to measure the surface quality of the workpiece, and has an importan...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q10/06
CPCG06Q10/04G06Q10/06393Y02P90/30
Inventor 孙惠斌姚元朴刘超屈鑫孙帅
Owner NORTHWESTERN POLYTECHNICAL UNIV