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Device and method for testing forming property of sheet material under effect of fluid pressure

A testing device and sheet forming technology, applied in the field of sheet hydroforming, can solve the problems of inability to achieve dynamic sealing, difficult real-time testing and accurate evaluation, etc., and achieve the effects of easy implementation, simple and reliable structure, and mature manufacturing technology

Inactive Publication Date: 2013-07-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the bottleneck problem that the traditional plate formability test method is difficult to carry out real-time test and accurate evaluation under fluid pressurized conditions, and because the plate sample is a non-circular cross-section, it is impossible to realize dynamic sealing under high fluid pressure and other bottleneck problems, and further provides Device and method for testing sheet formability under fluid pressure
The seal is set at the matching part of the clamping structure and the end cover, which solves the technical bottleneck caused by the dynamic sealing problem when the plate sample is a non-circular cross-section

Method used

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  • Device and method for testing forming property of sheet material under effect of fluid pressure
  • Device and method for testing forming property of sheet material under effect of fluid pressure
  • Device and method for testing forming property of sheet material under effect of fluid pressure

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specific Embodiment approach 1

[0026]Specific implementation mode one: the following combination figure 1 , figure 2 , image 3 and Figure 4 This embodiment will be specifically described. The device includes a thick-walled cylinder 11, which is a circular thick-walled cylinder, on which is provided with an injection hole 4 communicating with the fluid medium cavity 10, and injects the fluid into the fluid medium cavity 10 through the injection hole 4 during operation. Inject the fluid medium; the circular inner wall of the thick-walled cylinder 11 is smooth and connected up and down, and the thick-walled cylinder 11 is respectively connected with the upper end cover 13 and the lower end cover 9 by sealing threads, and the upper end cover 13 and the lower end cover 9 are respectively connected with the upper clamping Part 1 and the lower clamping part 7 are connected in the form of a cylindrical through hole to form a complete dynamic sealed cavity. The upper end cover 13 and the inner wall of the smoo...

specific Embodiment approach 2

[0027] Specific implementation mode two: the following combination figure 1 , figure 2 , image 3 and Figure 5 This embodiment will be specifically described. The difference between this embodiment and the first embodiment is that the gauge width of the aluminum alloy plate sample 3 is 5 mm, and the other components and structures are the same as those of the first embodiment.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the material of the plate sample is selected as a magnesium alloy, and other components and structures are the same as Embodiment 1.

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Abstract

The invention provides a device and a method for testing the forming property of a sheet material under the effect of fluid pressure, belongs to the field of a sheet material hydraulic forming technology, and aims at the problems that in a conventional sheet material forming property test, real-time testing and accurate evaluation can not be hardly carried out under a fluid pressurizing condition, and dynamic sealing is hard to carry out under a fluid high-pressure condition due to that a sheet material test sample is provided a non-circular section. The technical points are as follows: an end cover is matched with clamping pieces in a manner of adopting a piston cylinder; a connection region of the upper and lower clamping pieces is connected with the sheet material test sample in a manner of adopting a cylindrical pin; and the testing method sequentially comprises the following steps of: placing a test sample, combining a testing device, connecting a tester, applying hydraulic pressure and downwards moving a lower chuck, taking out the cut test sample and carrying out size measurement. The matching by adopting the piston cylinder manner can enable the sheet material test sample with a rectangular section to realize the fluid high-pressure dynamic sealing; and a simplified structure design of the device can enable the the hydraulic pressure in a cavity and the sheet material extension rate to be independently and accurately controlled. By using the device and the method disclosed by the invention, shape and size diversified forming property tests on the sheet material test sample can be realized.

Description

technical field [0001] The invention relates to a device and a method for testing the formability of a plate, in particular to a device and a method for testing the formability of a plate under the action of fluid pressure, and belongs to the technical field of plate hydroforming. Background technique [0002] With the rapid development of aerospace and automotive fields, the use of lightweight materials such as aluminum alloys, magnesium alloys, and titanium alloys is an important means to achieve weight reduction from the material approach. Especially in the field of aerospace, the vast majority of plate parts with complex shapes represented by fairings are made of lightweight materials such as aluminum-magnesium alloys. However, the contradictions of poor formability and low plasticity of these materials compared with conventional deep-drawing steels at room temperature have become the bottleneck of their processing and forming. Therefore, sheet hydroforming technology, ...

Claims

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Application Information

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IPC IPC(8): G01N3/28
Inventor 李峰张鑫龙苑世剑
Owner HARBIN UNIV OF SCI & TECH
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