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Self-piercing riveting method applied to outdoor billboard

A self-piercing riveting and billboard technology, which is applied in the field of self-piercing riveting, can solve the problems of poor sealing of joints, damage to joint strength and fatigue resistance, easy liquid intrusion, etc., and achieve good static properties and fatigue resistance , Guarantee sealing and anti-corrosion performance, and solve the effect of poor combined connection performance

Inactive Publication Date: 2017-07-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional riveting requires pre-drilling holes, and then forms a mechanical external lock through plastic deformation at both ends of the rivet. The sealing of the joint is not good, the liquid is easy to invade, and the joint is prone to corrosion, which will damage the strength and fatigue resistance of the joint.
When the light alloy plate and steel are connected by welding technology, due to the huge difference in the melting point and thermal expansion coefficient of the light alloy plate and steel, it is difficult to achieve a reliable connection of the steel-light alloy material combination by using the traditional resistance spot welding method

Method used

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  • Self-piercing riveting method applied to outdoor billboard
  • Self-piercing riveting method applied to outdoor billboard
  • Self-piercing riveting method applied to outdoor billboard

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1: A self-piercing riveting method applied to outdoor billboards, Q215 galvanized steel plate (1.5 mm in thickness) and AL1420 aluminum-lithium alloy plate (1.5 mm in thickness) were selected for single-lap self-piercing riveting test and joint mechanics In the performance test, the nail head height of the joint is -0.27 mm, the rivet opening is 0.81 mm, and the residual bottom thickness is 0.62 mm. The research shows that the average static failure load of AL1420-Q215 material combination single-lap self-piercing riveting joint is 5448 N, the energy absorption value is 15.3 J, and the failure mode of the joint is the separation of the lower plate and the self-piercing rivet; the shape and size of the joint used in the test are as follows Figure 7 As shown, the load-displacement curve of the joint is shown as Figure 8 shown.

example 2

[0033] Example 2: A self-piercing riveting method applied to outdoor billboards, Q215 galvanized steel plate (thickness 1.5 mm) and AA5052 aluminum alloy plate (thickness 1.5 mm) were selected for single-lap self-piercing riveting test and joint mechanical performance test , the nail head height of the joint is -0.44 mm, the rivet opening is 0.63 mm, and the residual base thickness is 0.63 mm. The research shows that the average static failure load of AA5052-Q215 material combination single-lap self-piercing riveting joint is 3303.5 N, the energy absorption value is 16.9 J, and the joint fails due to the fracture of the upper plate; the shape and size of the joint used in the test are as follows Figure 9 As shown, the load-displacement curve of the joint is shown as Figure 10 shown.

example 3

[0034] Example 3: A self-piercing riveting method applied to outdoor billboards. Q215 galvanized steel plate (1.5 mm in thickness) and 8090 aluminum-lithium alloy plate (1.5 mm in thickness) were selected for T-shaped self-piercing riveting test and joint peeling In the performance test, the nail head height of the joint is -0.15 mm, the rivet opening is 0.75 mm, and the residual bottom thickness is 0.78 mm. The research shows that the average maximum peeling load of the T-shaped self-piercing riveting joint with 8090-Q215 material is 870.5 N, and the energy absorption of the joint is 870.5 N. The value is 27.2 J, and the failure mode of the joint is that the contact area between the upper plate and the rivet head is broken, and the macroscopic fracture is V-shaped; the shape and size of the joint used in the test are as follows Figure 11 As shown, the load-displacement curve of the joint is shown as Figure 12 shown.

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Abstract

The invention relates to a self-piercing riveting method applied to an outdoor billboard and belongs to the technical field of self-piercing riveting technologies. Steel and a light alloy sheet are selected according to the requirements on the performance of the outdoor billboard; and a self-piercing riveting experimental study is performed on the selected steel and light alloy material combination; and a self-piercing riveting machine is used for self-piercing riveting of the joints of the steel and the light alloy sheet of the billboard. According to the self-piercing riveting method, the connection performance of the steel and the light alloy sheet of the outdoor billboard is reliable, and the airtightness and the corrosion resistance of connectors are guaranteed; and the connectors have favorable static mechanical property and the anti-fatigue performance, the problems that in a traditional connection mode, the connection performance of the steel-light alloy dissimilar material combination in the outdoor billboard is poor is solved, and weight reduction and efficiency improvement of the outdoor billboard are realized.

Description

technical field [0001] The invention relates to a self-piercing riveting method applied to outdoor billboards, and belongs to the technical field of self-piercing riveting. Background technique [0002] As an important way of publicity, outdoor billboards are widely used in all walks of life. Outdoor billboards are often hung on eye-catching places such as roofs and viaducts, which increases the bearing capacity of the support. Without affecting the overall performance of outdoor billboards, it is an inevitable trend to seek a way to reduce the weight of billboards. At present, outdoor billboards on the market often use a combination of steel structure brackets and light alloy plates to reduce weight, and traditional connection technologies such as traditional riveting and spot welding are usually used to connect steel-light alloy material combinations. Because outdoor billboards are affected by natural factors such as wind dynamic load, temperature difference between day ...

Claims

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Application Information

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IPC IPC(8): B21J15/02
CPCB21J15/025
Inventor 何晓聪刘洋
Owner KUNMING UNIV OF SCI & TECH
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