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Electric spindle service life evaluation method without sudden failure information

A sudden failure and life evaluation technology, applied in the direction of electrical digital data processing, instruments, data processing applications, etc., can solve problems such as no sudden failure without consideration

Active Publication Date: 2019-03-26
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The non-sudden failure problem is not considered in the existing competing failure modeling techniques

Method used

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  • Electric spindle service life evaluation method without sudden failure information
  • Electric spindle service life evaluation method without sudden failure information
  • Electric spindle service life evaluation method without sudden failure information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0093] Electric spindle life assessment

[0094] Using the test information in Qiu Ronghua's "Small Sample Electric Spindle Reliability Test Based on Performance Degradation", the 170MD18Y16 electric spindle was used as the sample to carry out the stress load F Y =81.1N, 1700-hour timed truncation reliability test with the spindle speed of 9000r / min, the radial runout index of the shaft end is used to reflect the rotation accuracy of the spindle, and the radial runout of the shaft end of the FT5070F laser displacement sensor is selected to realize the collection of spindle performance degradation information , and part of the collected information is shown in Table 1.

[0095] Table 1 Data sheet of electric spindle performance degradation test (radial runout of shaft end) μm

[0096]

[0097]

[0098] When the radial runout of the shaft end reaches 1.6 times the initial value, the sample electric spindle fails.

[0099] Combined with the degradation data, Qiu Ronghua o...

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Abstract

The invention belongs to the technical field of reliability analysis of electric spindles, and relates to an electric spindle service life evaluation method without sudden failure information. The defect that sudden failure and the influence of degradation on the sudden failure are ignored when modeling is conducted according to degradation information in the prior art is overcome. The method comprises the following steps that 1, an electric spindle product timing truncation reliability test and electric spindle product degradation information collection are conducted; 2, index distribution product reliability modeling; 3, reliability modeling of Weibull distribution products; 4, carrying out partial distribution competition risk reliability modeling under the condition of no burst failureinformation in combination with the degradation information; And 5, evaluating the service life of the motorized spindle based on the partial distribution competition risk reliability model. The partial distribution competition risk modeling method based on the unilateral confidence limit modeling basic failure rate and with the multi-performance degradation amount as the covariable is provided from the perspective of competition failure, and the method has important significance for reasonably evaluating the reliability level of the electric spindle and perfecting the reliability technical system of the electric spindle.

Description

technical field [0001] The invention belongs to the technical field of life evaluation of electric spindles, and relates to a reliability modeling and life evaluation method of electric spindles considering degradation effects without sudden failure information. Background technique [0002] The electric spindle is a product with high reliability and long life. Due to the limitation of time, funds and other factors, it is difficult to obtain sudden failure information in a short period of time, and the performance of the product always degrades during use, so its reliability research is carried out in combination with degradation information. . The study found that with the gradual decline of its own performance, the product is prone to sudden failure. Therefore, considering the impact of performance degradation on sudden failure, the reliability modeling and life evaluation of the electric spindle without sudden failure data are more effective from the perspective of compet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/15G06F17/18G06Q10/06
CPCG06F17/15G06F17/18G06Q10/0635G06Q10/06393G06F30/17G06F30/20G06F2119/04
Inventor 张英芝周禹彤郑玉彬徐严冬田致富张翼龙
Owner JILIN UNIV
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