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Machine tool diagnostic method and system

A diagnostic method and diagnostic system technology, applied in the direction of nuclear methods, general control systems, control/regulation systems, etc., can solve problems such as misdiagnosis of abnormal data, achieve high-precision diagnosis, and realize the effect of high-precision diagnosis

Active Publication Date: 2015-12-23
MITSUBISHI HEAVY IND MACHINE TOOL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there is a possibility of misdiagnosing abnormal data as normal in the Mahalanobis method

Method used

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  • Machine tool diagnostic method and system
  • Machine tool diagnostic method and system
  • Machine tool diagnostic method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0073] Hereinafter, embodiments of the machine tool diagnosis method and system of the present invention will be described with reference to the drawings.

[0074] figure 1 It is an explanatory diagram of a diagnostic system of a machine tool common to each embodiment.

[0075] exist figure 1 In , the structure of the main feed system of the machine tool 10 is shown. The ball screw of the feed system of the machine tool 10 includes: a ball screw screw thread portion 16 rotatably supported by a support bearing 14 provided in a bracket 14 fixed on the bed 12; The threaded portion 16 is screwed with a ball screw nut portion 18 .

[0076] A table 20 is attached to the nut portion 18 . A position detector 30 and an acceleration sensor 32 are attached to the table 20 . The rotational force of the servo motor 24 is transmitted to the threaded portion 16 of the ball screw via the reduction gear 22 . The rotation of the servo motor 24 is controlled by a servo control device 28 . ...

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PUM

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Abstract

A machine tool diagnostic method includes: an initial acquisition step for acquiring initial measurement data by measuring multiple parameters of the machine tool while operating the machine tool in a predetermined operating pattern; a generating step for generating a normal area in a mapping space of a 1 class support vector machine method using the initial measurement data as training data; a reacquisition step in which, after operating the machine tool, the multiple parameters are measured to acquire re-measured data while again operating the machine tool in the predetermined operating pattern; and a diagnostic step for diagnosing the machine tool using the re-measured data as test data, based on whether or not the test data is contained in the normal area of the mapping space in the 1 class support vector machine method.

Description

technical field [0001] The present invention relates to a diagnosis method and system for a machine tool, and more specifically, relates to a diagnosis method and a system for diagnosing a machine tool using a support vector machine (Support Vector Machines: SVM) method. Background technique [0002] In machine tools, changes over time such as wear and deterioration due to use, mechanical damage, and the like may occur. Therefore, for the purpose of preventing sudden failure or stoppage of the machine tool, regular inspection and parts replacement are performed. However, when a machine tool stops abnormally or generates noise, it is necessary to find out the cause, prepare or manufacture replacement parts, and implement countermeasures, so the downtime of the machine tool becomes longer. Therefore, as disclosed in Patent Documents 1 to 3 below, various techniques for automatically diagnosing a machine tool before an abnormal situation such as an abnormal stop of the machine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/00G06N20/10
CPCB23Q17/007G06N20/10G05B2219/37212G06N20/00G05B19/4065
Inventor 山本英明藤岛泰郎
Owner MITSUBISHI HEAVY IND MACHINE TOOL CO LTD