Two-way tension device with large-range adjustable tension rate and two-way tension method

A technology of bidirectional stretching and stretching rate, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of small adjustable range of stretching rate, high complexity of the device, and poor sanitation conditions on the testing machine site, so as to achieve control High precision, compact structure, low speed stretching and stable effect

Pending Publication Date: 2020-06-26
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The adjustable range of the tensile rate in this invention is small, and it cannot realize a wide range of speed regulation, and has many prob

Method used

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  • Two-way tension device with large-range adjustable tension rate and two-way tension method
  • Two-way tension device with large-range adjustable tension rate and two-way tension method
  • Two-way tension device with large-range adjustable tension rate and two-way tension method

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Experimental program
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Effect test

Example Embodiment

[0036] Embodiment one, a biaxial stretching device with a wide range of adjustable stretching rate, such as figure 1 and figure 2 As shown, it includes a base 1, which includes a center bed and four peripheral beds; the four sides of the center bed are connected to the four peripheral beds respectively; the center bed includes a center base; each peripheral bed includes one The upper base 1-1 and a lower base 1-2, the upper base 1-1 and the lower base 1-2 are connected by screws; the four stretching mechanisms are respectively connected with the four upper bases. The lower part of the base 1 is provided with several leveling feet 1-3; the leveling feet 1-3 are used to adjust the horizontal position of the base 1 (see image 3 ).

[0037] Four stretching mechanisms are fixed on the base 1, and the four stretching mechanisms are x positive stretching mechanism 2-1, y positive stretching mechanism 2-2, x negative stretching mechanism 2-3 and y Negative stretching mechanism 2-4. Th...

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Abstract

The invention relates to the field of tension test machines, and discloses a two-way tension device with a large-range adjustable tension rate and a two-way tension method. The two-way tension devicecomprises a base, four tension mechanisms are arranged on the base, and each tension mechanism comprises a lead screw module, a tension module and a roller linear guide rail pair; the lead screw module is connected with the tension module, and the roller linear guide rail pair is connected with the tension module and the lead screw module. Each tension mechanism is provided with a tension and pressure sensor; two of the four tension mechanisms are oppositely arranged in the x direction, the other two tension mechanisms of the four tension mechanisms are oppositely arranged in the y direction,and the four tension mechanisms are arranged on the base in a crossed mode. The two-way tension testing machine is compact in structure, the uniaxial feeding speed is controlled through the two servomotors, the nut rotating type ball screw pair is matched, the tension rates in different ranges are achieved, and compared with a traditional two-way tension testing machine, the two-way tension testmachine has the advantages that the tension rates can be adjusted in a large range, tension is stable, and the control precision is higher.

Description

technical field [0001] The invention relates to the field of tensile testing machines, in particular to a bidirectional stretching device and a bidirectional stretching method with a wide range of adjustable stretching rates. Background technique [0002] During the sheet forming process, the sheet is in a complex stress state in most cases, and the two-way stress state is generally in the sheet surface. Under different stress states, the deformation behavior of the sheet metal is obviously different. Therefore, it is far from enough to study the deformation behavior of sheet metal only by using the material properties obtained by the traditional uniaxial tensile test method. It is imminent to dig out the mechanical properties of the sheet metal under bidirectional loading and establish an accurate material model. Two-way tensile test using a cross-shaped specimen is an experimental method developed in recent years to study the deformation behavior of anisotropic sheet meta...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/02
CPCG01N3/02G01N3/08G01N2203/0017
Inventor 管延智阳振峰李强
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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