Riveting method of ultrahigh strength steel plates or aluminum alloy plates

An ultra-high-strength, aluminum alloy plate technology, which is applied in the field of riveting between ultra-high-strength steel plates or with aluminum alloy plates, and in the processing of metal plates, to achieve the effect of realizing connections and avoiding cracks

Inactive Publication Date: 2014-02-26
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the problem that the existing technology cannot realize the connection between high-strength steel plates and the connection between high-strength steel plates and aluminum alloy plates under the premise of ensuring that the mechanical properties of high-strength steel plates are not affected after riveting, and provides a Riveting method between ultra-high-strength steel plates or with aluminum alloy plates

Method used

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  • Riveting method of ultrahigh strength steel plates or aluminum alloy plates
  • Riveting method of ultrahigh strength steel plates or aluminum alloy plates
  • Riveting method of ultrahigh strength steel plates or aluminum alloy plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] When both the upper panel 2 and the lower panel 3 are ultra-high-strength steel plates, the steps of the self-piercing riveting method between the ultra-high-strength steel plates or the riveting method with the aluminum alloy plate of the present invention are as follows:

[0094] 1. Before self-piercing riveting, first cool the rivet 1 with liquid nitrogen in the cooling room, and lower the temperature of the rivet 1 to 0°C, so that the riveting connection of the rivet 1 to the upper sheet 2 and the lower sheet 3 during riveting The region undergoes rapid quenching.

[0095] 2. Place the upper panel 2 and the lower panel 3 to be riveted on the first composite die 5, and drive the first composite blank holder 4 to move down to compress the upper panel 2 and the lower panel 3.

[0096] 3. The first optical fiber heater 7 heats the upper sheet 2, and the first optical fiber heater 7 is aimed at the riveted connection area on the upper surface of the upper sheet 2 for loc...

Embodiment 2

[0102] In the case where the material is the upper plate 2 of the aluminum alloy plate and the material is the lower plate 3 of the ultra-high-strength steel plate, the self-piercing riveting method between the high-strength steel plates or the riveting method with the aluminum alloy plate of the present invention The steps are as follows:

[0103] 1. Before self-piercing riveting, the rivet 1 is first cooled with liquid nitrogen in the cooling chamber to lower its temperature to 0°C, so that the riveting connection area between the upper sheet 2 and the lower sheet 3 is fixed by the rivet 1 during riveting. Rapid quenching.

[0104] 2. Place the upper panel 2 and the lower panel 3 on the first composite die 5, and drive the first composite blank holder 4 to move down to compress the upper panel 2 and the lower panel 3.

[0105] 3. The first optical fiber heater 7 heats the upper plate 2, that is, the first optical fiber heater 7 is aligned with the riveted connection area on...

Embodiment 3

[0111] For the case where the materials of the upper panel 2 and the lower panel 3 are ultra-high-strength steel plates, the steps of the riveting method without rivets in the riveting method between the ultra-high-strength steel plates or with the aluminum alloy plate of the present invention are as follows:

[0112] 1. Place the upper panel 2 and the lower panel 3 on the second composite die 11, and drive the second composite blank holder 10 to move down to compress the upper panel 2 and the lower panel 3.

[0113] 2. The third optical fiber heater 13 heats the upper sheet 2, that is, the third optical fiber heater 13 is aimed at the riveted connection area on the upper surface of the upper sheet 2 for local concentrated heating. For the upper plate 2 made of high-strength steel plate, adjust the power of the third optical fiber heater 13 to 1KW, heat the riveted connection area of ​​the upper plate 2 to 950°C, and heat the The sensitive resistor 9 measures the temperature o...

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Abstract

The invention discloses a riveting method of ultrahigh strength steel plates or aluminum alloy plates and aims to solve the problems that ultrahigh strength steel plates cannot be riveted and joints are difficult to effectively weld since rigid and crispy metallic compounds occur to welding spots when the ultrahigh strength steel plates and the aluminum alloy plates are under spot welding. The riveting method includes the steps of 1, performing liquid nitrogen cooling on rivets in a cooling chamber before riveting so as to cool the rivets to below 0 DEG C; 2, placing an upper plate and a lower plate on a first compound female die, and holding down the upper and lower plates with a first compound binder ring; 3, heating riveting areas of the upper plate with a first fiber-optic heater to a threshold; 4, heating riveting areas of the lower plate with a second fiber-optic heater to a threshold; 5, feeding the low-temperature rivets to a central light through hole of the first compound binder ring, and pressing the rivets for riveting with a first compound punch; 6, co-pressing the rivets with the first compound punch and the first compound female die to turn out ring feet of the rivets to obtain rivet fasteners; 7, releasing the first compound punch to allow it to move up and return.

Description

technical field [0001] The invention relates to a metal plate processing method belonging to the field of metal processing, more specifically, the invention relates to a riveting method between ultra-high-strength steel plates or aluminum alloy plates. Background technique [0002] In recent years, energy and environmental issues have become increasingly prominent, which has prompted the rapid development of lightweight technology in the automotive industry. It has become the most important means to reduce the weight of the car body by using a large number of lightweight and high-strength materials (such as high-strength steel plates, aluminum alloys, and magnesium alloy plates, etc.) to achieve significant weight reduction. [0003] When welding steel plates, as the steel strength level increases, the welding stability will decrease, the plastic toughness will deteriorate, the crack sensitivity will increase, and the performance of the heat-affected zone will change, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J15/02
CPCB21J15/025B21J15/08B21J15/36
Inventor 庄蔚敏李兵赵文增张梦溪许钦华李永强路大鹏
Owner JILIN UNIV
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