Micro friction measurement device

A measuring device and micro-friction technology, applied in the field of micro-friction measuring devices, detection and evaluation of micro-friction measuring devices, to achieve the effects of low cost, high measurement accuracy, and easy operation

Inactive Publication Date: 2015-04-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the above problems, to provide a device with high precision and low cost that can measure the friction force between the surfaces of the micro-device when it is working, so as to improve the friction and wear between the surfaces and thus increase the service life of the micro-machine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: A micro-friction measurement device, including a support plate 1, a base 2, a fine-tuning knob 3, a lift table 4, a sample table 5, a linear guide 6, a ball screw 7, a bearing seat 8, and an elastic coupling 9 , servo motor 10, resistance strain gauge 11, elastic element 12, cylindrical block 13, detachable connecting block 14, support rod 15, universal flexible hinge 16, fixed plate 17, moving plate 18, connector 19, fixed plate 20. Friction contact 21, micro-drill chuck 22; the support plate 1 is fixed on the base 2 through bolt connection, the sample table 5 and the nut of the ball screw 7 are fixed together and move on the linear guide rail 6, and the linear guide rail 6 is fixed on the lifting platform 4 with screws, the sample platform 5 drives the ball screw 7 through the servo motor 10 to realize its horizontal displacement, and the normal load and vertical displacement are realized through the fine-tuning knob 3 on the lifting platform 4 , the ela...

Embodiment 2

[0017] Embodiment 2: A micro-friction measurement device, including a support plate 1, a base 2, a fine-tuning knob 3, a lift table 4, a sample table 5, a linear guide 6, a ball screw 7, a bearing seat 8, and an elastic coupling 9 , servo motor 10, resistance strain gauge 11, elastic element 12, cylindrical block 13, detachable connecting block 14, support rod 15, universal flexible hinge 16, fixed plate 17, moving plate 18, connector 19, fixed plate 20. Friction contact 21, micro-drill chuck 22; the support plate 1 is fixed on the base 2 through bolt connection, the sample table 5 and the nut of the ball screw 7 are fixed together and move on the linear guide rail 6, and the linear guide rail 6 is fixed on the lifting platform 4 with screws, the sample platform 5 drives the ball screw 7 through the servo motor 10 to realize its horizontal displacement, and the normal load and vertical displacement are realized through the fine-tuning knob 3 on the lifting platform 4 , the ela...

Embodiment 3

[0019] Embodiment 3: a kind of micro-friction measuring device, the structural principle of the present invention is as figure 1 As shown, the adjustment of the vertical displacement and the loading of the positive load are realized by adjusting the fine-tuning knob 3 on the lifting platform 4 . The sample table 5 and the nut of the precision ball screw 7 are fixed together by bolts, and the precision ball screw 7 is connected with the servo motor 10 through the elastic coupling 9, and the rotary motion of the servo motor 10 is converted into the sample table on the linear guide rail 6. The horizontal movement on the top, the linear guide rail 6 is connected and fixed on the lifting table 4 with screws. The sensor structure for measuring the normal load mainly includes an elastic element 12 and two pairs of resistance strain gauges 11, which are connected with the support plate 1 to form a cantilever structure. The friction sensor structure for measuring the horizontal direct...

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Abstract

The invention relates to a micro friction measurement device, and belongs to the technical field of micro force measurement. By adjusting a fine tuning knob on a lifting platform, loading normal load is realized. Resistance strain gages are adhered to front and back surfaces of an elastic element, form a Wheatstone bridge through leads, so as to indirectly measure the normal load. Two fixed pole plates and a moving pole plate form a differential capacitive sensor; the two fixed pole plates are fixed on the lifting platform through supporting rods; the moving pole plate is connected with a detachable connecting block through a connecting piece; when a servo motor is operated to drive a ball screw, to enable a sample stage to perform linear motion, the connecting block suffers frictional force, a small displacement in the horizontal direction can occur, and the polar distance between the pole plates can be changed, therefore, the capacitance of the capacitive sensor is changed, and the friction measurement is realized. The micro friction measurement device has a simple structure, can realize force loading without a high-precision placement platform, improves the measurement sensitivity, greatly reduces the linear error, and has a good effect on measuring micro force, such as friction force and the like.

Description

technical field [0001] The invention relates to a micro-friction measuring device, in particular to a micro-friction measuring device for detecting and evaluating the surface roughness of a micro-machine, and belongs to the technical field of micro-force measurement. Background technique [0002] At present, in the micro-friction research, there is no unified standard test platform in the world, and there are many different types of micro-motion experimental equipment. Due to the different research objects, different test devices are developed and used; at the same time, in the field of tribology , the relatively mature experimental instruments and equipment are mainly testers suitable for macro tribology and nano tribology. For friction in fretting corrosion, the contact pressure loaded is about O. 01N to 2N, between macro friction and micro friction. In micromachines, due to the reduction in size, the distance between components is often only micron or even nanometer. Ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/02G01B7/34
Inventor 杨晓京李尧
Owner KUNMING UNIV OF SCI & TECH
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