Test method, and establishment method of thermoforming wrinkling limit surface on the basis thereof

A hot forming and stamping test technology, which is applied in the direction of applying stable tension/pressure to test the strength of materials, to achieve the effect of ingenious design and improved precision

Active Publication Date: 2016-12-07
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to provide a method for establishing the wrinkle limit surface of high-strength steel plate hot forming, which can not only solve the wrinkle evaluation problem that can be solved by the traditional forming wrinkle limit surface, but also provide a method that can accurately and intuitively judge Evaluation criteria for wrinkling during hot forming of high-strength steel plates

Method used

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  • Test method, and establishment method of thermoforming wrinkling limit surface on the basis thereof
  • Test method, and establishment method of thermoforming wrinkling limit surface on the basis thereof
  • Test method, and establishment method of thermoforming wrinkling limit surface on the basis thereof

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Embodiment Construction

[0042] Attached below Figure 1-8 The technical scheme of the present invention will be described in detail.

[0043] In order to obtain the hot forming wrinkle limit line, and maintain a stable temperature during the heat preservation and test stages, and prevent excessive oxidation of high-strength steel, the present invention provides a high-strength sheet metal hot-forming stamping test device, which includes: a support 1, a gas Check valve 2, sealing box 3, resistance wire 4, quartz glass 5, high-speed camera 6, infrared temperature sensing device 7, bracket top cover 8, punch hydraulic pump 9, vent pipe 10, punch hydraulic pump connecting rod sealing ring 11. Punch 12, positioning ring 13, test piece 14, die 15, seal box support 16.

[0044] Among them, the sealed box support 16 and the support 1 are welded to the base. Both ends of the concave mold 15 are provided with grooves for matching with the sealed box support and positioning the concave mold 15. The positioning rin...

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Abstract

The invention provides a thermoforming stamping test device for high-strength metal board materials, which includes: a support (1), a gas one-way valve (2), a sealing box (3), a resistance wire (4), quartz glass (5), a high-speed camera (6), an infrared temperature sensing apparatus (7), a support top cover (8), a stamping head hydraulic pump (9), a gas inlet pipe (10), a stamping head hydraulic pump connecting rod sealing ring (11), a stamping head (12), a positioning ring (13), a test piece (14), a concave die (15) and a sealing box pedestal (16). The invention also provides a test method of the thermoforming stamping test device for the high-strength metal board materials and an establishment method of a thermoforming wrinkling limit surface on the basis of the method. In the invention, the thermoforming anti-wrinkling performance of a high-strength steel plate can be determined on the basis of the height of the wrinkling limit surface. The higher is the wrinkling limit surface; the better is the thermoforming anti-wrinkling performance of the high-strength steel plate.

Description

Technical field [0001] The invention relates to the field of sheet metal hot forming processing, and in particular to a method for establishing the wrinkle limit surface of sheet metal hot forming. The main purpose is to judge the wrinkling phenomenon in the hot forming of sheet metal and evaluate the anti-wrinkle performance of the sheet metal. Background technique [0002] High-strength steel usually refers to a steel with a tensile strength higher than 370MPa. It has a good combination of strength and toughness. Its outstanding characteristics are high specific strength and good anti-collision performance. Therefore, it can meet the same safety performance requirements to a certain extent. Realizing the lightweight of automobiles has broad market application prospects. However, experiments have shown that high-strength steel sheets have poor forming properties at room temperature and are prone to wrinkles and cracks, which seriously affect the popularization and application of...

Claims

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Application Information

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IPC IPC(8): G01N3/18
CPCG01N3/18
Inventor 崔俊佳李光耀孙光永欧航
Owner HUNAN UNIV
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