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Metal plate rotating friction riveting method

A technology of rotating friction and metal sheets, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve problems such as high pressure and complex structure, and achieve the effect of simple rivet structure, simplified rivet structure, and good mechanical properties

Inactive Publication Date: 2012-08-01
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Research shows that this riveting method has a very good riveting effect, but the slight disadvantage is that the rivet used has a plug, and the structure is relatively complicated
Moreover, when extruding, the pressure used is relatively high

Method used

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  • Metal plate rotating friction riveting method
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  • Metal plate rotating friction riveting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1: For the connection of magnesium alloy plates. The model of the magnesium alloy plate is AZ31, and the size is 125×38×2mm; the size of the rivet is: the length of the clamping rod is 25mm, the diameter of the rivet cap is 10mm, the length of the semi-hollow rivet body is 6.5mm, and the inner and outer diameters of the rivet are 3.5mm and 3.5mm respectively. 5mm, depth 3mm. The overlapping length of the upper and lower magnesium plates is 25 mm; when riveting, the rivet speed is 3600 rpm.

[0052] After the riveting was completed, the shearing tensile test was carried out on the riveted joint. The results showed that the shear strength of the joint was (5.65±0.23) kN, which was significantly higher than that of the same material without heating self-riveting joint (4.32±0.09) kN and the shear strength (4.95 ± 0.12) kN of a joint that is self-riveted after heating the sheet to 180°C.

Embodiment 2

[0053] Example 2 : Used for the connection of magnesium alloy plate and aluminum alloy plate. The model of the magnesium alloy plate is AZ31, the size is 125×38×2mm; the model of the aluminum alloy plate is 6063, the size is 125×38×3mm; the size of the rivet is: the length of the clamping rod is 25mm, the diameter of the rivet cap is 10mm, and the semi-hollow The length of the rivet body is 7mm, the internal and external diameters of the rivet are 3.5mm and 5mm respectively, and the depth is 4mm; the magnesium alloy plate is used as the upper plate, the aluminum alloy plate is used as the lower plate, and the lap length of the upper and lower plates is 25mm; the rivet speed is 3600 rpm.

[0054] After the riveting was completed, a shearing tensile test was carried out on the riveted joints. The shear strength of the joint is (6.90±0.64) kN.

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Abstract

The invention relates to a metal plate rotating friction riveting method which adopts a semitubular rivet, a cylindrical punching lever and a die, wherein the semitubular rivet comprises an integrally arranged clamping lever, a rivet cap and a semitubular rivet shank, the head of the cylindrical punching lever is provided with a rotary circular pit, and the middle part of the pit is provided with a protruding plug; the cylindrical punching lever is vertically positioned in the die and supported by the die; and the shape of the circular piston hole in the die is matched with that of the cylindrical punching lever. The invention provides a riveting technology for metal plate connection in a wider application range, and also provides a new metal plate riveting method aiming at the defects in the existing riveting technology. The invention uses the plug-free semitubular rivet, and the mechanical interlock between the plate and the rivet is formed by the extrusion of the punching lever with a tapered plug at the head; and thus, the rivet structure is simplified, and the rivet can rotate into the metal plate more easily, so that the extrusion pressure required by the rivet swelling strain for forming the mechanical interlock is reduced.

Description

technical field [0001] The invention relates to the technical field of riveting and welding of metal materials, in particular to a rotary friction riveting method. Background technique [0002] Body weight reduction is an important way to reduce vehicle energy consumption. In order to reduce the weight of the car body, the use of light non-ferrous metal alloys, such as aluminum alloys and magnesium alloys, can be increased in the production of cars. Joining technology is an indispensable key technology in the application of metal materials. There are many kinds of joining techniques for metal materials, such as: Electric welding, Resistance Spot Welding, Friction Stir Spot Welding, Solid Riveting, Blind Riveting ), Friction Stir Blind Riveting, Self-piercing Riveting, Clinching, etc. (see references 1-2 for details). For light non-ferrous metal alloys, most of them have high electrical conductivity, thermal conductivity and easy to form oxide layer during welding, so trad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04B21J15/04B23K20/12
CPCB21J15/027B21J15/025
Inventor 王明星张兴璐韩高锟王培中刘忠侠
Owner ZHENGZHOU UNIV
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