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Device and method for accurately measuring thickness of weak-rigidity thin part

A weakly rigid and thin-shaped technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of small measurement range, difficult to realize online scanning by ray method, cumbersome dielectric measurement, etc., and achieve the effect of high detection accuracy

Active Publication Date: 2020-12-22
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The laser triangulation method can only measure transparent samples; the capacitance method has a small measurement range due to the fixed poles, and the change of the dielectric brings a huge cumbersome workload to the measurement; the ray method is not easy to achieve online scanning, and requires frequent corrections, and other technologies Both have certain limitations, and are not suitable for accurate measurement of the thickness of thin parts with weak rigidity

Method used

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  • Device and method for accurately measuring thickness of weak-rigidity thin part
  • Device and method for accurately measuring thickness of weak-rigidity thin part
  • Device and method for accurately measuring thickness of weak-rigidity thin part

Examples

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Effect test

Embodiment 1

[0039] A device for accurately measuring the thickness of weakly rigid thin parts, such as Figure 1-7 As shown, the base plate 1 is included, the base plate 1 is provided with a circular platform 2, and the circular platform 2 is provided with a vacuum rotary table 3 which rotates with the circular platform 2. The table top of the vacuum rotary table 3 is circular and vacuum The bottom center of the rotary table 3 is provided with a support column 4, the top of the support column 4 is fixedly connected with the vacuum rotary table 3, the bottom of the support column 4 is connected with the base plate 1 in rotation, and the base plate 1 is provided with a servo motor for driving the support column 4 to rotate (not shown in the figure).

[0040] The upper surface of the vacuum rotary table 3 is provided with a plurality of coaxial annular grooves 5 , and the inner depths of the plurality of coaxial annular grooves 5 are consistent. The side of the vacuum rotary table 3 is prov...

Embodiment 2

[0046] A method for measuring the thickness of weakly rigid thin-shaped parts using the device for accurately measuring the thickness of weakly rigid thin-shaped parts in Embodiment 1, such as Figure 8 and Figure 9 As shown, taking the weakly rigid thin-shaped part to be tested as a copper sheet as an example, the method for thickness detection and calculation of the weakly rigid thin-shaped part of the present invention, the specific steps are as follows:

[0047] (1) Place the weakly rigid thin part 12 to be tested on the vacuum rotary table 3, vacuum the vacuum rotary table 3, and perform vacuum adsorption on the weakly rigid thin part 12.

[0048] (2) Initialize the position of the measuring probe 10 on the transverse guide rail 9 , that is, the initial position of the measuring probe 10 on the transverse guide rail 9 is that the measuring probe 10 points vertically to the center of the upper surface of the vacuum rotary table 3 . Move the transverse guide rail 9 down u...

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Abstract

The invention belongs to the technical field of weak-rigidity thin part detection and particularly relates to a device and method for accurately measuring thickness of a weak-rigidity thin part. The device comprises a base plate, wherein the base plate is provided with a vacuum rotating table in rotating fit with the base plate, two vertical guide rails are symmetrically arranged on the two sidesof the vacuum rotating table, a transverse guide rail is arranged between the two vertical guide rails, and two ends of the transverse guide rail are connected with the vertical guide rails in a sliding mode respectively; and a measuring probe slidably connected with the transverse guide rail is arranged on the transverse guide rail. According to the device, by rotating the vacuum rotary workbenchand adjusting the transverse displacement of the measuring probe, spiral scanning detection is carried out on the coordinates of each site corresponding to the two measuring surfaces of the weak-rigidity thin part arranged on the vacuum rotary workbench, and a thickness value of each detection site of the to-be-detected part is obtained through calculation; therefore, the deformation informationof the surface of the weak-rigidity thin part is obtained, and the method plays an important guiding role in machining application of the weak-rigidity thin part.

Description

technical field [0001] The invention belongs to the technical field of detection of weakly rigid thin parts, and in particular relates to a device and method for accurately measuring the thickness of weakly rigid thin parts. Background technique [0002] Weakly rigid thin parts usually refer to thin parts with poor rigidity, easy deformation, and high precision requirements. The ratio of diameter to thickness is usually greater than 10:1, and the accuracy of key parts is required to reach IT5-IT7 level, such as glass sheets, aluminum sheets, and copper sheets. etc., are widely used in various precision manufacturing industries, such as aviation, aerospace, national defense and high-tech civil applications. [0003] Due to stress and gravity, weakly rigid thin parts have complex deformation conditions, and it is difficult to accurately measure their thickness. At present, the existing thickness measurement methods mainly include laser triangulation method, capacitance method...

Claims

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Application Information

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IPC IPC(8): G01B21/08G01B21/20G01B21/32
CPCG01B21/08G01B21/20G01B21/32
Inventor 王伟周冠宇张祥朝徐敏
Owner FUDAN UNIV