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Variable-range in-situ hardness test device under prestress

A technology of hardness testing and variable range, applied in the direction of measuring device, testing material hardness, strength characteristics, etc., to achieve the effect of high space utilization, compact space layout and reasonable structure layout

Pending Publication Date: 2019-07-23
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no hardness testing instrument for testing the hardness of materials under prestressed conditions.

Method used

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  • Variable-range in-situ hardness test device under prestress
  • Variable-range in-situ hardness test device under prestress
  • Variable-range in-situ hardness test device under prestress

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Embodiment Construction

[0024] The detailed content of the present invention and its specific implementation will be further described below in conjunction with the accompanying drawings.

[0025] see Figure 1 to Figure 3 As shown, the in-situ hardness testing device with variable range under prestress of the present invention is composed of four major parts: X / Z axis degree of freedom precision motion unit, variable range press-in unit, test prestress loading unit and data acquisition unit. Among them, the X / Z-axis degree of freedom precision motion unit is composed of the vertical rigid combination of the X-direction mobile platform and the Z-direction mobile platform. The individual parts are powered by precision servo motors, which are converted into linear motion through ball screw nut pairs. Accurate positioning of the indenter space is realized; the variable-range press-in unit is arranged on the upper side, the Z-degree-of-freedom platform realizes large-scale loading, and the advanced piezo...

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PUM

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Abstract

The invention relates a variable-range in-situ hardness test device under prestress, and belongs to the field of precision tests. According to the device, power is provided to an X / Z-axis degree of freedom precision motion unit through a precision servo motor, and accurate positioning of test points is realized through a ball screw nut pair; a variable-range pressing unit is arranged on the upperside, and a Z-axis mobile platform carries an advanced piezoelectric stack to complete the loading of loads with different ranges; a test prestress loading unit passes through a two-stage worm and gear retarding mechanism through the precision servo motor and is matched with the screw nut pair to realize loading; and a data acquisition unit comprises a precision tension and pressure sensor, a precision pressure sensor and a precision displacement sensor. The device has the advantages of being novel in conception, reliable in structure principle, complete in function, , compact in structure andfavorably compatible with various mainstream optical microscopes.

Description

technical field [0001] The invention relates to the field of precision hardness testing, in particular to the field of novel multifunctional hardness testing devices, especially a variable-range in-situ hardness testing device under prestress. It is used for on-line testing of the hardness value of new materials or coatings. At the same time, it can test the hardness of materials under service conditions such as preloaded tensile and compressive stresses, providing new technologies for the research and development of new materials and the study of material damage and failure mechanisms under service conditions. ways and means. Background technique [0002] Hardness is an index that characterizes the ability of a material to locally resist pressing hard objects into its surface. As far as the tested material is concerned, the hardness is a comprehensive index reflecting a series of different physical properties such as elasticity, plasticity, strength, toughness and wear res...

Claims

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Application Information

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IPC IPC(8): G01N3/44
CPCG01N3/44G01N2203/0003G01N2203/0019G01N2203/0051G01N2203/0082G01N2203/0098G01N2203/0208G01N2203/0244G01N2203/0641G01N2203/0682
Inventor 刘欣赵宏伟李磊秦峰赵大庆赵甄章李世超赵久成
Owner JILIN UNIV
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