Cutting-tool operation reliability evaluation method based on SVD transformation and support vector space

A support vector, reliability technology, used in character and pattern recognition, special data processing applications, instruments, etc.

Inactive Publication Date: 2018-01-09
CHINA THREE GORGES UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a tool operation reliability evaluation method based on SVD transformation and support vector space, aiming to solve the tool reliability evaluation problem under the condition of a single small batch sample

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  • Cutting-tool operation reliability evaluation method based on SVD transformation and support vector space
  • Cutting-tool operation reliability evaluation method based on SVD transformation and support vector space
  • Cutting-tool operation reliability evaluation method based on SVD transformation and support vector space

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Embodiment Construction

[0071] For CNC lathe processing tools, the failure definition and life estimation in ISO3685, ISO8688, GB / T16461 are based on a certain point value in the wear area. The most commonly used index is the wear amount Vm of the flank. These data are It needs to be acquired through an industrial microscope or a CCD camera. There are disadvantages such as high price, intermittent measurement, stoppage interference processing, etc., and it is difficult to perform real-time dynamic evaluation of its operating status. This patent uses vibration signals as the research object to characterize the wear process of the tool, that is, the vibration signals are processed to obtain fault characteristics and complete failure. evaluation process.

[0072] Experimental process: The machine tool model used in this experiment is Taiwan Youjia Seiki FTC-20 CNC lathe, and the tool model used in the experiment is CNMG120408-HM. In the experiment, the MZDH0670 series video microscope system was used t...

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Abstract

The invention discloses a cutting-tool operation reliability evaluation method based on SVD transformation and support vector space. The method is characterized in that the method includes: sample data acquisition and significant-feature-quantity extraction, wherein vibration signal data are extracted; SVD dimension reduction, wherein signal reconstruction is carried out on high-dimensional feature quantity indexes, valid components are extracted, and a data dimension number is reduced; support vector space hypersphere construction, wherein the sample data are mapped into the high-dimensionalhypersphere space; and relative-distance index calculation and reliability index definition, wherein a relative distance of a test sample point and a support vector data space hypersphere is calculated, a relative distance index is mapped to [0, 1] through an introduced membership function, and thus an operation reliability index is obtained. The method has the advantage of aiming to solve the cutting-tool reliability evaluation problem under a condition of single equipment or small-batch samples.

Description

technical field [0001] The invention relates to proposing an operation reliability evaluation method based on support vector description, and establishes direct connection between operation state information and reliability. , especially related to the tool operation reliability evaluation method based on SVD transformation and support vector space. Background technique [0002] As an important part of the CNC machine tool, the reliability of the cutting tool will inevitably affect the processing efficiency and stability of the entire machine tool. Accurately assessing the reliability of the tool to make a replacement strategy in time can not only reduce production costs and bring significant economic benefits, but also ensure the processing quality of the workpiece. Many scholars have made a lot of tentative work in tool reliability evaluation. M.Aramesh et al. took tool wear, cutting speed and feed rate as covariates, established a proportional hazard model with Weibull d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06K9/62
Inventor 陈保家肖文荣陈法法刘浩涛聂凯汪新波邱光银沈保明
Owner CHINA THREE GORGES UNIV
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