Fatigue test method and fixture thereof of rubber bushing

A technology for rubber bushing and fatigue testing, which is applied in the testing of vehicles, testing of mechanical components, testing of machine/structural components, etc. It can solve the problems of inaccurate and large differences in bench tests, and achieve short test periods , high accuracy and low cost

Active Publication Date: 2015-04-01
CHERY AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a rubber bushing fatigue test method and its tooling, which solves the problems that

Method used

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  • Fatigue test method and fixture thereof of rubber bushing
  • Fatigue test method and fixture thereof of rubber bushing
  • Fatigue test method and fixture thereof of rubber bushing

Examples

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Embodiment Construction

[0027] Embodiment, taking the torsion beam bushing of an automobile as an example, the torsion beam bushing in a real vehicle is as follows: figure 1 As shown, the main loads are longitudinal force, lateral force, and vertical displacement. The above three loads are collected by the test site, and then the loads are filtered, deburred, etc., and the strain signals are converted into force value target signals and Displacement target signal.

[0028] The force value target signal and the displacement target signal are respectively iteratively calculated to obtain the force value drive signal and the displacement drive signal. The iterative operation is specifically to obtain the initial force value driving signal and the initial displacement driving signal according to the force value target signal, displacement target signal, system frequency response inverse function and iteration factor, specifically, through the force value target signal or displacement drive signal × frequ...

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Abstract

The invention discloses a fatigue test method of a rubber bushing, comprising the following steps: (a) acquiring vertical and lateral strain road spectrums and a displacement road spectrum of vertical jump of the rubber bushing in an actual road; (b) converting the vertical and lateral strain road spectrum to be a power value target signal and converting the displacement road spectrum of vertical jump to be displacement target signal; (c) performing iterative operation on the power value target signal and displacement target signal respectively to obtain a power value drive signal and a displacement drive signal; (d) applying the power value drive signal to the vertical and lateral directions of the rubber bushing respectively by a hydraulic servo mechanism, and vertically applying the displacement drive signal to the rubber bushing. The invention further discloses a matched fixture, by utilizing the method and the fixture, the problems that the difference between a test result and an actual use result of an existing rubber bushing table test is great and the table test is inexact are solved; the method and fixture is widely applicable in the field of rubber bushing tests.

Description

technical field [0001] The invention relates to the field of test and detection of rubber bushes of automobiles, in particular to a fatigue test method of rubber bushes and tooling thereof. Background technique [0002] With the development of the automobile industry, automobiles play an increasingly important role in people's lives, and people have higher and higher requirements for various performances of automobiles, especially NVH performance and reliability. [0003] Rubber bushing is widely used in automobile chassis system. It is a product composed of rubber and metal. It has the advantages of attenuation, absorption of high-frequency vibration and noise, small size and light weight. There is a wide range of applications in places with complex forces, such as frames, torsion beams, connecting rods, control arms, etc. Once the rubber bushing fails, it will seriously affect the NVH performance and comfort of the car, and even affect the safety of the car. Therefore, m...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01M17/007
Inventor 张李侠赵忠印巩德峰章礼文
Owner CHERY AUTOMOBILE CO LTD
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