Compliant hinge stress measuring device

A compliant hinge and stress measurement technology, applied in the direction of measuring devices, electromagnetic measuring devices, measuring force, etc., can solve the problems of high cost, difficulty in obtaining quantitative experimental data, complex photoelastic measurement experiments, etc., and achieve convenient and easy installation , Highly reproducible effect

Pending Publication Date: 2019-08-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Commonly used methods for measuring stress include sticking strain gauges and photoelastic measurement, but photoelastic measurement experiments are more complicated and costly, and are generally used for qualitative analysis, and it is difficult to obtain quantitative experimental data

Method used

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Such as figure 1 As shown, a compliant hinge stress measurement device, including:

[0029] Base 3, the edge of the base 3 is provided with a number of screw holes along the length direction to connect the fixed ends of the compliant hinge 7 to be tested by bolts. This embodiment reserves threaded holes for 7 hinge installation experiments. If necessary, increase the measurement hinge Quantity, only need to lengthen the base and multi-process the screw holes for hinge installation, and at the same time, the base 3 is fixed on the vibration isolation table through the through holes 4 on the four corners;

[0030] The spiral micrometer support 2 is fixedly arranged at one end of the base;

[0031] The spiral micrometer head 1 is threadedly connected with the spiral micrometer head support 2, and the precision is 0.01mm;

[0032] A long strip, o...

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Abstract

The invention discloses a compliant hinge stress measuring device comprising a base, a spiral micrometer head support, a spiral micrometer head, a strip plate, and a plurality of strain gauges. A plurality of screw holes that are connected with fixed ends of to-be-measured compliant hinges by bolts are formed in the edge of the base in a length direction. The spiral micrometer head support is fixedly arranged at one end of the base. The spiral micrometer head is in threaded connection with the spiral micrometer head support. One end of the strip plate is abutted against the spiral micrometer head; and a long circular slot or a plurality of through holes that is or are connected with free ends of all to-be-measured compliant hinges by bolts is or are formed in the middle part of the strip plate in a length direction. The plurality of strain gauges are pasted on the deformed surfaces of all to-be-measured compliant hinges respectively and are used for collecting deformation signals of all to-be-measured compliant hinges and sending the signals to a static strain analysis device. According to the invention, the same rotation angles are given between different hinges and thus the hinges deform, so that the stress differences between different hinges are measured by the strain gauges. Moreover, the measuring device having a simple structure is operated conveniently.

Description

technical field [0001] The invention belongs to the field of compliant mechanisms, and in particular relates to a compliant hinge stress measuring device. Background technique [0002] Precision positioning technology has been widely used in many fields such as high-end equipment manufacturing (such as lithography machines, scanning electron microscopes, etc.), aerospace, micro-nano operations, and medical surgery, and has always been a research hotspot at home and abroad. Traditional rigid mechanisms are difficult to achieve high-precision positioning operations due to problems such as assembly clearances and frictional lubrication, while compliant mechanisms can well meet the needs of precise positioning due to their advantages such as high precision, high rigidity, and compact structure. Compliant mechanisms can be divided into two types according to the distribution of flexibility: concentrated flexibility and distributed flexibility. The flexibility of the concentrated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22G01B7/16
CPCG01B7/18G01L1/2262
Inventor 张宪民周安泰朱本亮梁俊文
Owner SOUTH CHINA UNIV OF TECH
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