Method for enhancing rivet-free connection strength of steel-aluminum double-metal sheet through oxidation treatment

A technology of oxidation treatment and riveting connection, which is applied in the field of non-rivet connection of dissimilar materials, can solve the problems of reducing the axial connection strength, and achieve the effects of avoiding stress concentration, improving connection strength and reducing component force

Active Publication Date: 2022-02-18
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Smaller amounts of interlock reduce axial connection strength when subjected to axial loads

Method used

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  • Method for enhancing rivet-free connection strength of steel-aluminum double-metal sheet through oxidation treatment
  • Method for enhancing rivet-free connection strength of steel-aluminum double-metal sheet through oxidation treatment
  • Method for enhancing rivet-free connection strength of steel-aluminum double-metal sheet through oxidation treatment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as Figure 1~5 , a method for enhancing the rivetless connection strength of steel-aluminum bimetal sheets through oxidation treatment, comprising:

[0042] Step S1, prepare the steel plate 2 and the aluminum plate 1 to be connected: in this embodiment, the steel plate 2 is a low carbon steel plate, the aluminum plate is an A5052 aluminum plate, the length of the steel plate 2 and the aluminum plate 1 are both 100 mm, the width is 30 mm, and the thickness is 1.5 mm;

[0043] Step S2, surface cleaning treatment: use a wire brush, sandpaper or a grinding wheel to remove the original oxide on the surface of the steel-aluminum bimetallic plate to be compounded on the aluminum plate 1 and steel plate 2, and use acetone and alcohol to wipe off the oil on the surface to be compounded, and then use a hair dryer Blow dry for later use;

[0044] Step S3, surface oxidation treatment: heating in the air, placing the clean steel plate 2 on a drying platform, using a torch to ...

Embodiment 2

[0055] Such as figure 1 with 6 Shown, a kind of oxidation treatment strengthens the method for the rivetless connection strength of steel-aluminum bimetal sheet, comprises:

[0056] Step S1, prepare the steel plate 2 and the aluminum plate 1 to be connected: in this embodiment, the steel plate 2 is a low-carbon steel plate, the aluminum plate is an A5052 aluminum plate, the length of the steel plate 2 and the aluminum plate 1 are both 100 mm, the width is 30 mm, and the thickness is 1 mm;

[0057] Step S2, surface cleaning treatment: use a wire brush, sandpaper or a grinding wheel to remove the original oxide on the surface of the steel-aluminum bimetallic plate to be compounded with the 5052 aluminum plate 1 and the low-carbon steel plate 2 obtained in step S1, and use acetone and alcohol to clean the surface to be compounded Wipe off the oil stains, and then dry them with a hair dryer for later use;

[0058] Step S3, surface oxidation treatment: heating in the air, placing...

Embodiment 3

[0063] Such as figure 1 Shown, a kind of oxidation treatment strengthens the method for the rivetless connection strength of steel-aluminum bimetal sheet, comprises:

[0064] Step S1, prepare the steel plate 2 and the aluminum plate 1 to be connected: in this embodiment, the steel plate 2 is a low-carbon steel plate, the aluminum plate is an A5052 aluminum plate, the length of the steel plate 2 and the aluminum plate 1 are both 100 mm, the width is 30 mm, and the thickness is 1 mm;

[0065] Step S2, surface cleaning treatment: use a wire brush, sandpaper or a grinding wheel to remove the original oxide on the surface of the steel-aluminum bimetallic plate to be compounded with the 5052 aluminum plate 1 and the low-carbon steel plate 2 obtained in step S1, and use acetone and alcohol to clean the surface to be compounded Wipe off the oil stains, and then dry them with a hair dryer for later use;

[0066] Step S3, surface oxidation treatment: the clean low carbon steel plate 2 ...

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Abstract

The invention provides a method for enhancing the rivet-free connection strength of a steel-aluminum double-metal sheet through oxidation treatment. The method comprises the steps that: original oxides and oil stains on to-be-compounded surfaces of a steel plate and an aluminum plate are cleaned; the to-be-compounded surface of the steel plate is subjected to oxidation treatment; the size of a punch and the size of a female die of a die are selected; and rivet-free connection is carried out, a pressurization stage and a pressure maintaining stage are completed, and demolding is performed to obtain a steel-aluminum rivet-free connection joint. Before the rivet-free connection, the to-be-compounded surface of the steel plate is subjected to oxidation treatment, so that the dissimilar plates are microcosmically engaged at the joint, friction force at the contact surface is increased, deformation tends to be synchronous, and thus the macroscopic interlocking amount is increased, the joint is restrained by a side ring surface and a bottom in the failure process, the stress concentration phenomenon is avoided, and meanwhile, the component force in a loaded direction is also reduced, the axial tension and the radial shear force required by joint failure are improved, and the connection strength of the joint is improved.

Description

technical field [0001] The invention relates to the technical field of rivetless connection of dissimilar materials, in particular to a method for enhancing the strength of rivetless connection of steel-aluminum bimetal thin plates through oxidation treatment. Background technique [0002] The lightweight of automobiles has gradually been valued by automobile manufacturers. It is difficult to meet the safety and crash resistance requirements of automobiles by using simple light alloy bodies. For example, the rivetless connection of steel and aluminum dissimilar materials is used in automobile door panels and engine compartment covers Panel assembly, chassis light connectors and other parts of the body. The combined application of dissimilar plates can not only meet the strength requirements but also reduce the overall weight of the car body. It is one of the important means to realize the lightweight of automobiles, but it also faces the challenge that dissimilar metals are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D39/02
CPCB21D39/026
Inventor 余超付伦杨俊锋张文哲肖宏
Owner YANSHAN UNIV
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