Thermal forming limit experimental device for metal sheet and testing method

A technology of sheet metal and experimental device, which is applied in the direction of testing the ductility of materials to achieve the effect of preventing errors

Inactive Publication Date: 2014-06-11
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The problem to be solved by the present invention is to provide a metal plate hot forming limit test device, which can not only solve the forming performance evaluation problem that can be solved

Method used

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  • Thermal forming limit experimental device for metal sheet and testing method
  • Thermal forming limit experimental device for metal sheet and testing method
  • Thermal forming limit experimental device for metal sheet and testing method

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Experimental program
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Embodiment Construction

[0039] Attached below Figure 1-10 The present invention is described in detail with embodiment.

[0040] In order to obtain the high-temperature forming limit line, maintain a stable temperature during the heat preservation and experiment stages, and prevent excessive oxidation of high-strength steel, the invention provides a metal plate hot forming limit experimental device, which includes: punch 1, gas check valve 2, Sealing box 3, blank holder ring 4, test piece 5, die 6, die pressure rod sealing ring 7, die hydraulic pump 8, high-speed camera 9, air intake pipe 10, infrared temperature sensing device 11, vent hole 12, lighting lamp 13. Tempered glass 14, bracket 15, resistance wire 16, blank holder support 17, punch hydraulic pump connecting rod sealing ring 18, sealing box support 19, punch hydraulic pump 20.

[0041]Wherein, the punch hydraulic pump 20, the sealing box support 19 and the support 15 are welded on the base. The upper end of the piston connecting rod of ...

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PUM

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Abstract

The invention relates to a thermal forming limit experimental device for a metal sheet and a testing method. The device comprises a punch (1), a gas one-way valve (2), a seal box (3), a blank holder (4), a die (6), a die pressure lever sealing ring (7), a die hydraulic pump (8), a high-speed camera (9), an air inlet pipe (10), an infrared temperature sensing device (11), a vent hole (12), an illuminating lamp (13), toughened glass (14), a bracket (15), a resistance wire (16), a blank holder support (17), a punch hydraulic pump connecting rod sealing ring (18), a seal box support (19) and a punch hydraulic pump (20). Test pieces can be heated by the thermal forming limit experimental device during experiments, and errors caused by heating a sample outside and transferring the heated sample to a mould are prevented.

Description

technical field [0001] The invention relates to the field of thermal forming processing of metal plates, in particular to a thermal forming limit test device for metal plates. Background technique [0002] High-strength steel generally refers to steel with a cold-rolled tensile strength above 340MPa, a hot-rolled tensile strength above 370MPa, or a yield strength above 210MPa. Due to its high specific strength and good anti-collision performance, it can greatly reduce the weight of automobiles under the same safety conditions, so it has attracted widespread attention in the automobile manufacturing industry. However, high-strength steel plates have poor formability at room temperature and are prone to defects such as wrinkles and cracks. Therefore, hot forming processes are usually used to deform them to obtain qualified parts. [0003] In the normal temperature forming process, there are many ways to evaluate the formability of the sheet, among which the forming limit diag...

Claims

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Application Information

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IPC IPC(8): G01N3/28
Inventor 孙光永崔俊佳李光耀刘翔
Owner HUNAN UNIV
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