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A ball screw pair reliability test device

A ball screw pair and test device technology, applied in the direction of machine gear/transmission mechanism testing, etc., can solve the problems of lack of versatility, short test stroke, narrow application range, etc., to achieve good market prospects, strong versatility, Reasonable effect of mechanical structure design

Active Publication Date: 2016-02-24
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The domestic ball screw sub-industry has some preliminary test devices for reliability, but they can only simulate the environment and cannot simulate the actual working conditions, or the scope of application is very narrow, and the test stroke is short, so only One-way loading is not universal, and there is no public report on foreign related equipment, so the research on the reliability test bench with large loads meets the actual needs and can provide support and help for the reliability design of new products

Method used

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  • A ball screw pair reliability test device
  • A ball screw pair reliability test device
  • A ball screw pair reliability test device

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Embodiment Construction

[0025] to combine figure 1 , a reliability test device for a ball screw pair of the present invention, comprising a bed part I, a test bench headstock part II, a loading part III, a tailstock part IV and a driving part V; the driving part V is located in the bed part I The headstock part II of the test bench is located on the side of the upper surface of the bed part I close to the driving part V, the tailstock part IV is located on the side of the upper surface of the bed part I away from the driving part V, and the loading part III is located on the side of the bed part I above and between the headstock part II and the tailstock part IV of the test bench, the loading part III can reciprocate relative to the bed part I driven by the drive part V;

[0026] to combine figure 2 , the bed part I includes a bed 1, a headstock support plate 2, an anti-collision block 3, a lubrication pump 4, a tailstock support plate 5, a proximity switch 6, a tank chain bracket 7 and a limit swi...

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Abstract

The invention discloses a reliability test device of ball screw pairs. Tested lead screws are supported by the two ends of a lead screw supporting unit, a loading mechanism is connected with two nuts of each tested ball screw pair through a tool, internal pulling / pressing loads are exerted between the two nuts on each tested ball screw pair, and the loading force is measured in real time through a pulling and pressing force sensor. The tested ball screw pairs are driven by a variable frequency motor to positively and negatively rotate to drive the loading mechanism to perform the reciprocating motion on a machine body, and reliability testing and measuring on the whole lengths of threads of the ball screw pairs are accordingly completed. The operation states of the tested lead screws in the testing process are monitored in real time through a dynamic torque sensor, a noise sensor and a vibration sensor to judge whether a test is continuously carried out. By means of the reliability test device, the reliability of the ball screw pairs can be tested, the three or less tested lead screws can be simultaneously driven to conduct the test, the efficiency is high, and test data are real and reliable.

Description

technical field [0001] The invention belongs to the technical field of reliability testing of mechanical devices, in particular to a reliability testing device for a ball screw pair. Background technique [0002] The ball screw pair is a linear drive unit with high precision, high efficiency and long service life. It is widely used in the fields of machine tools, automobiles and aerospace. Its service life and performance reliability are very important. The ball screw pair is mainly composed of screw, ball, nut, etc. The ball and the raceway surface contact each other under the action of the working load. When the contact stress exceeds the elastic limit, plastic deformation will occur, and permanent marks will appear on the raceway surface. ; The ball rolls continuously from a certain point on the surface of the raceway, and the contact point is subjected to repeated contact stress. After a certain number of stress cycles, fatigue pitting will occur on the surface of the ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/02
Inventor 欧屹冯虎田徐益飞丁聪韩军祖莉梁医
Owner NANJING UNIV OF SCI & TECH
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