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Single-axle double-direction symmetric stretching experimental machine

A uniaxial, bidirectional, experimental machine technology, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of large size of the loaded specimen, high loading speed of the specimen, and unfavorable deformation of the micro-area of ​​the specimen. The effect of reducing transmission error, improving transmission accuracy and reliable measurement results

Inactive Publication Date: 2007-01-03
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problems and defects of the micro-stretching devices reported in the above-mentioned patents and documents mainly include: one is the biaxial stretching system, which cannot realize the advantages of the uniaxial stretching experiment; The center point of the specimen will move with the loading, which is not conducive to observing the micro-deformation of the specimen. Third, the size of the loaded specimen is large, which is not suitable for the loading requirements of thin film and filament specimens. Fourth, the loading speed of the specimen is relatively high. , not suitable for deformation measurement of samples with small deformation; fifth, the deformation of the sample is obtained indirectly by measuring the displacement of the fixture, and the micro-area information of the specimen cannot be obtained; sixth, it is driven by a DC motor, which cannot be stopped halfway and cannot pass Programming to realize the diversity of loading methods

Method used

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  • Single-axle double-direction symmetric stretching experimental machine
  • Single-axle double-direction symmetric stretching experimental machine
  • Single-axle double-direction symmetric stretching experimental machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The parameters of each element in the system are: the maximum load of the test piece is 150N, the maximum movement displacement is 10mm, the load range of the force sensor is 200N, and the resolution is 1N.

[0019] The main view of the structure diagram of the present invention is as figure 1 As shown, the whole device includes a stepper motor 11, a stepper motor controller 12, a force sensor 7, a worm gear 3, a worm 2, a ball screw 5, a left nut 9, a right nut 6, a linear guide 13, a bearing 4, and a frame 1. Coupling 15, specimen clamping device 14.

[0020] figure 2 It is a top view of the structure of the present invention. Among them, 11-stepping motor; 12-stepping motor controller; 15-coupling.

[0021] The connection relationship of the above components is: the stepper motor controller 12 controls the stepper motor 11; the stepper motor 11 is connected to the worm 3 through the coupling 15, and the worm and the matched worm wheel 2 realize movement transmission a...

Embodiment 2

[0028] The parameters of each element in the system are: the maximum load of the test piece is 150N, the maximum movement displacement is 10mm, the load range of the force sensor is 200N, and the resolution is 1N. The imaging part of the non-contact optical measurement system consists of an imaging lens and a CCD. The appropriate magnification can be selected according to the size of the sample, and the middle part of the sample can be accurately imaged and stored in the data processing system connected with the CCD. Related procedures to calculate the deformation information of the specimen.

[0029] The structure of the present invention is as figure 1 As shown, the whole device includes a stepper motor 11, a stepper motor controller 12, a force sensor 7, a worm gear 3, a worm 2, a ball screw 5, a left nut 9, a right nut 6, a linear guide 13, a bearing 4, and a frame 1. Coupling 15, specimen clamping device 14. The non-contact optical measurement part consists of a CCD 10 and a...

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Abstract

A single axle bidirectional symmetry stretch testing machine belongs to the experimental mechanics equipment technology field, including: the step-by-steps motor 11, the step-by-steps motor controller, the strength sensor, the wormwheel, the worm, the ball bearing screw mandre, the left nut, the right nut, the linear slideway, the axletree, the base 1, the shaft coupling, the testing sample holding device; the step-by-steps motor connects with the worms by the shaft coupling; the wormwheel cooperates with the worm, the linear slideway and the axletree locates on the base; the strength sensor fixes on the right nut of the ball bearing screw mandrel, spreads the one side of the testing sample holding device, the other side of the testing sample holding device fixes on the left nut. The invention is: uses the machine transmission to improve the transmitting precision; uses the step-by-steps motor to load; the distortion measure can use the step-by-steps motor to compute or uses the non-touch photics displacement measure system.

Description

Technical field [0001] The invention relates to a uniaxial biaxial symmetrical tensile testing machine, which is a uniaxial biaxial symmetrical tensile experimental measuring device for testing the static and dynamic mechanical properties of macro-scale films, filaments, thin plates and other materials, and belongs to an experimental mechanical device Technical field. Background technique [0002] The study of the mechanical properties of materials has always been a research field of attention in the mechanics of materials. There are various detection techniques for the mechanical properties of materials, and the commonly used methods include uniaxial stretching, three-point bending, and biaxial stretching. Among them, uniaxial stretching is the most direct method to measure elastic modulus, Poisson's ratio, yield strength and breaking strength. Moreover, the tensile test process of uniaxial tension is simple, with many measurable performance indicators, and the test results are ...

Claims

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Application Information

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IPC IPC(8): G01N3/08
Inventor 谢惠民张鸣方岱宁花韬戴福隆
Owner TSINGHUA UNIV
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