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A test device and test method for sheet formability at ultra-low temperature

A sheet metal forming and testing device technology, applied in the direction of measuring device, analyzing materials, strength properties, etc., can solve the problems of inability to obtain deformation information and mechanical properties of metal sheets, and achieve the effect of obtaining more, accurate test data, and more material parameters

Active Publication Date: 2021-07-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is: in order to overcome the existence of the existing testing device that can only obtain the basic mechanical parameters of the metal sheet under the unidirectional stress state, but cannot obtain the deformation information and mechanical properties of the metal sheet under the complex stress state question

Method used

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  • A test device and test method for sheet formability at ultra-low temperature
  • A test device and test method for sheet formability at ultra-low temperature
  • A test device and test method for sheet formability at ultra-low temperature

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Experimental program
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specific Embodiment approach 1

[0034] Specific implementation mode one: as figure 1 As shown: the test device for sheet metal formability described in this embodiment includes an ultra-low temperature cooling system 1, a deformation test system 2, an incubator 4, a coolant recovery device 5 and an exhaust device 6;

[0035] The deformation testing system 2 is arranged in the incubator 4; the ultra-low temperature cooling system 1, the coolant recovery device 5 and the exhaust device 6 are arranged outside the incubator 4;

[0036] The incubator 4 is provided with a transparent observation window 4-1, two exhaust holes 4-2, a liquid inlet hole and a liquid discharge hole 4-3; the transparent observation window 4-1 is used for monitoring the metal plate Deformation information under a complex stress state, the exhaust device 6 communicates with the casing of the incubator through an exhaust hole 4-2, communicates with the deformation testing system 2 through another exhaust hole 4-2, and The mist in the incu...

specific Embodiment approach 2

[0041] Specific implementation mode two: as Figure 1-7 As shown, the deformation testing system 2 described in this embodiment also includes an upper binder ring 2-6 and a lower binder ring 2-7; the upper binder ring 2-6 and the lower binder ring 2-7 are both It is a circular ring and is arranged coaxially with the upper and lower clamps; the upper binder ring 2-6 is located under the upper clamp 2-1, and the lower binder ring 2-7 is located under the lower clamp 2- 2, sheet metal 8 is installed between the upper blank holder 2-6 and the lower blank holder 2-7.

[0042] Other composition and connection methods are the same as those in Embodiment 1.

specific Embodiment approach 3

[0043] Specific implementation mode three: as image 3 and 7 As shown: the lower surface of the upper binder ring 2-6 described in this embodiment has a raised portion 2-6-1, and the upper surface of the lower binder ring 2-7 has a groove 2-7-1, The raised portion 2-6-1 and the groove 2-7-1 are vertically opposite to each other, and the raised portion 2-6-1 coincides with the groove 2-7-1.

[0044] Other composition and connection methods are the same as those in Embodiment 2.

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Abstract

The invention discloses a test device and a test method for sheet metal formability at ultra-low temperature, and relates to the technical field of sheet metal performance testing. The invention aims to overcome the problem that the existing testing device cannot obtain the deformation information and mechanical properties of the metal plate under ultra-low temperature and complex stress state. The invention includes an ultra-low temperature cooling system, a deformation testing system, an incubator, a coolant recovery device, an exhaust device, an online acquisition system and a computer control system; the incubator is used for heat preservation, and the exhaust device sucks out the mist in the incubator through the exhaust hole Outside the box, the coolant recovery device recovers the remaining coolant after the test through the drain hole; the ultra-low temperature cooling system provides the metal sheet with the required different test low temperatures through the liquid inlet hole; the deformation test system fixes the metal sheet and forms it through the sheet The device conducts complex stress tests on metal plates; the line acquisition system and computer control system monitor and record test parameters in real time. The invention is used for performance testing of metal plates.

Description

technical field [0001] The invention relates to the technical field of testing the mechanical properties of metal plates, in particular to a testing device and a testing method for the mechanical forming properties of plates under ultra-low temperature environments and complex stress conditions. Background technique [0002] Structural materials such as aluminum and aluminum alloys, copper and copper alloys, titanium and titanium alloys, and austenitic stainless steel have special ultra-low temperature properties, and are widely used in the manufacture of low-temperature pressure vessels, low-temperature storage tanks, pipe fittings, valves and other industrial products In aerospace industry, high energy physics, superconducting technology and nuclear industry and other fields. Such products are usually served under complex stress conditions and ultra-low temperature environments, and the low-temperature mechanical properties under complex stress conditions determine the ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/04G01N3/00
CPCG01N3/00G01N3/04G01N2203/0026G01N2203/0075G01N2203/0228G01N2203/0282G01N2203/04
Inventor 刘伟苑世剑
Owner HARBIN INST OF TECH
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