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Miniature heavy-load uniaxial pressure test system with mechanical arm and test method

A uniaxial pressure, testing system technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems of poor experimental teaching effect, inability to operate manually, high purchase cost, etc.

Active Publication Date: 2021-07-06
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rock strength tests include rock compressive strength tests, rock tensile strength tests, rock shear strength tests, etc. However, the existing rock mechanics test instruments are mainly for scientific research, and their high purchase costs and high maintenance costs The characteristics of complex operation and operation determine that it must be operated by a full-time experimenter. These instruments are difficult to open to students. Therefore, students can only passively listen to the experimenter's explanation during the experiment learning, and cannot operate it by hand. The experimental teaching effect is poor.
Moreover, the rock mechanics test instruments used for scientific research work are large in size, heavy in weight, and complex in structure of the hydraulic system, so they are not suitable for the test teaching site of the school and the group test of multiple sets.
[0004] In existing rock strength tests, the application of dynamic and static loads often adopts oil pressure loading, such as a dynamic and static load superimposed rock mechanics test disclosed in Chinese patent document CN110031321B Machine and test method and Chinese patent document CN111220463A disclose a rock uniaxial compressive strength prediction system and method, this kind of loading structure when the oil leakage problem occurs in the oil system, the maintenance operation of the equipment is complicated, and the maintenance cost of the equipment is high
The announced portable shearing instrument for students to operate uses an oil pressure rod to apply pressure, and the rock point load tester uses an oscillating oil pump to apply pressure (Fu Zhiliang, "Rock Mechanics Test Course", 2010,66-67,70 -71) When operating the hydraulic pressure device, the load of the specimen is unstable, the readings are inaccurate, the full stress-strain test results and the constitutive relationship of rock strength cannot be obtained, and the displacement sensor used in the prior art uses interval output data , the strain data cannot accurately correspond to the stress change, which affects the determination of the rock strength constitutive relationship

Method used

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  • Miniature heavy-load uniaxial pressure test system with mechanical arm and test method
  • Miniature heavy-load uniaxial pressure test system with mechanical arm and test method
  • Miniature heavy-load uniaxial pressure test system with mechanical arm and test method

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Effect test

Embodiment 1

[0060] like Figure 1-4 As shown, this embodiment provides a miniature heavy-duty uniaxial pressure testing system with a mechanical arm, including a loading mechanism 1, a transmission mechanism 2, a control mechanism 3, a power distribution mechanism 4 and a support base 6, wherein,

[0061] The loading mechanism 1 is set on the support base 6, the transmission mechanism 2 passes through the support base 6 to connect the loading mechanism 1, the transmission mechanism 2 is connected to the control mechanism 3, both the transmission mechanism 2 and the control mechanism 3 are connected to the power distribution mechanism 4, and through the power distribution mechanism 4 Supply power to the transmission mechanism and the control mechanism, and apply load to the loading mechanism by controlling the transmission mechanism through the control mechanism. The power distribution mechanism is a power supply circuit, which supplies power to the control mechanism and the transmission m...

Embodiment 2

[0083]A kind of test method when carrying out the tensile test of the miniature heavy-duty uniaxial pressure testing system with mechanical arm as described in embodiment 1, operation steps are as follows:

[0084] (1) Make a cylindrical test piece, record the size, density and specific gravity of the test piece, then start the power distribution mechanism and control mechanism, and the system is in standby state;

[0085] (2) Put the test piece into the Brazilian splitting fixture, then place the Brazilian splitting fixture on the indenter, the control mechanism controls the operation of the servo motor, drives the single-axis mechanical arm to rise through the ball screw, and then drives the Brazilian splitting fixture Rising, stop the servo motor when the pressure sensor reads;

[0086] (3) Set the sampling period and compression speed, and then start the compression test, the servo motor starts to run, and the single-axis mechanical arm is driven by the ball screw to conti...

Embodiment 3

[0090] A kind of test method when the miniature heavy-duty uniaxial pressure testing system with mechanical arm as described in embodiment 1 is carrying out point load strength test, operation steps are as follows:

[0091] (1) Make a cylindrical test piece, record the size, density and specific gravity of the test piece, then start the power distribution mechanism and control mechanism, and the system is in standby state;

[0092] (2) Place a conical point load indenter on the indenter, place the test piece on the conical point load indenter, place a conical point load indenter on the upper part of the test piece, and measure the conical point load indenter on the upper part of the test piece Then set the measured distance as the running distance, the control mechanism controls the operation of the servo motor, and the ball screw drives the single-axis mechanical arm to rise the set distance. At this time, the conical point load pressure head on the upper part of the test piec...

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Abstract

The invention relates to a miniature heavy-load uniaxial pressure test system with a mechanical arm and a test method, which belong to the technical field of rock mechanics tests. The test system comprises a loading mechanism, a transmission mechanism, a control mechanism, a power distribution mechanism and a supporting seat, wherein the loading mechanism is arranged on the supporting seat, the transmission mechanism penetrates through the supporting seat to be connected with the loading mechanism, the transmission mechanism is connected to the control mechanism, and the transmission mechanism and the control mechanism are both connected to the power distribution mechanism. The power distribution mechanism supplies power to the transmission mechanism and the control mechanism, and the control mechanism controls the transmission mechanism to apply load to the loading mechanism. Miniature heavy load is achieved, the test precision is high, control is easy, the test method is simple, test data are complete, and students can obtain complete test results and understand the rock strength constitutive relation.

Description

technical field [0001] The invention relates to a miniature heavy-duty uniaxial pressure testing system and a testing method with a mechanical arm, belonging to the technical field of rock mechanics testing. Background technique [0002] "Rock Mechanics" (or "Rock Mechanics") is a core course for engineering majors such as mining engineering, geological engineering, water conservancy and hydropower engineering, tunnel engineering, geotechnical engineering, oil and gas development engineering, and underground construction engineering. In the process, testing is an essential link. [0003] Rock strength test, as a mandatory test project, plays an important role and significance in assisting theoretical teaching, cultivating students' hands-on ability, and developing a systematic knowledge structure of rock strength. Rock strength tests include rock compressive strength tests, rock tensile strength tests, rock shear strength tests, etc. However, the existing rock mechanics tes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/02
CPCG01N3/08G01N3/02
Inventor 闫莎莎孔德斌张同军孟祥喜王浩宇李林轩李硕李国峰杨昊霖
Owner SHANDONG UNIV OF SCI & TECH
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