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Bearing diagnostic device for machine tool

一种诊断装置、轴承的技术，应用在采用机械装置、机械轴承测试、旋转运动的轴承等方向，能够解决发热胶着、旋转不良、机床故障等问题

Active Publication Date: 2017-03-15
OKUMA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these abnormalities occur, poor rotation or heat sticking will occur, which will cause failure during normal operation of the machine tool, so it is desirable to diagnose the abnormality of the bearing

Method used

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  • Bearing diagnostic device for machine tool
  • Bearing diagnostic device for machine tool
  • Bearing diagnostic device for machine tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Embodiments of the present invention will be described below based on the drawings.

[0027] figure 1 It is a schematic diagram showing an example of a bearing diagnostic device of a machine tool that diagnoses a bearing used in a spindle device that is a rotary shaft device that rotates a tool.

[0028] exist figure 1 Among them, 1 is a spindle device, and in a spindle housing 2, a spindle 3 as a rotating shaft with a tool 4 installed at the front end and rotated by a spindle motor (not shown) is bearing (here, a ball bearing in which rolling elements are balls). ) 5,5 shaft support. Reference numeral 6 denotes a rotation speed detector for detecting the rotation speed of the main shaft 3 , and a temperature sensor 7 for inserting a probe into the vicinity of the bearings 5 ​​, 5 is provided in the main shaft case 2 .

[0029] The bearing diagnosis device 10 is provided with a spindle control device 11 for controlling the spindle motor, and a measurement device 12 f...

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PUM

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Abstract

The invention provides a bearing diagnostic device for a machine tool. The device is capable of detecting abnormality of a bearing in a precise and low-cost manner at an early time prior to possible damage to a machine tool. The bearing diagnostic device includes a rotation speed detector and a calculating apparatus which detect the rotation speed of a spindle at a certain specific rotation speed; a temperature sensor and a calculating apparatus which detect the temperature of the spindle; a friction torque calculating part which calculates a friction torque of the bearing; a rolling speed calculating part which calculates the rolling sped of the bearing; a bearing pre-pressing estaimation part which estimates the pre-pressing of the bearing; a lubricant viscosity estimation part which estimate the lubricant viscosity of the bearing; a bearing characteristics calculating part which, based on the friction torque, the rolling speed, the pre-pressing, and the lubricant viscosity, calculates bearing characteristics; a storage apparatus which stores a reference bearing characteristics; and a determination apparatus which compares the bearing characteristics calculated by the bearing characteristics calculating part and the reference bearing characteristics stored in the storage apparatus, and determines the presence of abnormality.

Description

technical field [0001] The present invention relates to a bearing diagnostic device for detecting abnormality of a rolling bearing used for a shaft support of a rotary shaft on a machine tool. Background technique [0002] In a rotating shaft device having a rotating shaft such as a spindle installed in a machine tool, a rolling bearing (hereinafter simply referred to as a "bearing") for supporting the rotating shaft includes an inner ring, an outer ring, and a plurality of bearings arranged between the two rings. The rolling elements (rollers, etc.) and the cage for keeping the distance between the rolling elements, the inner ring rotates integrally with the rotating shaft, and the outer ring is fixed by being fitted into a main shaft housing or the like. [0003] Examples of abnormalities occurring in this bearing include poor lubrication, contamination of foreign matter, abrasion, excessive load, and the like. If these abnormalities occur, poor rotation or thermal sticki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/00B23Q17/10
CPCB23Q17/00B23Q17/10F01M1/16G01N19/02F16C33/6637F16N29/04F16N2250/08F16N2250/16F16N2270/52F16C19/52F16C19/525F16C2233/00F16C2322/39F16C19/54G01M13/04G01K13/08G01N11/14B23Q17/007B23Q5/043
Inventor 川田直树小池一成
Owner OKUMA CORP
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