Unlock instant, AI-driven research and patent intelligence for your innovation.

A local heating self-piercing riveting method for magnesium alloy plates

A self-piercing riveting and local heating technology, applied in metal processing equipment, forming tools, manufacturing tools, etc., can solve the problem of easy cracking of magnesium alloy sheets, ensure the quality of self-piercing riveting, promote wide application and improve production efficiency Effect

Inactive Publication Date: 2015-09-16
KUNMING UNIV OF SCI & TECH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a local heating self-piercing riveting method for magnesium alloy plates to solve the problem that cracks are easily generated in the self-piercing riveting process of magnesium alloy plates

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A local heating self-piercing riveting method for magnesium alloy plates
  • A local heating self-piercing riveting method for magnesium alloy plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: The method of locally heating the self-piercing riveting device for the magnesium alloy plate of this embodiment is: before the self-piercing riveting of the magnesium alloy upper plate 2 and the magnesium alloy lower plate 3, the position to be riveted on the lower surface of the magnesium alloy lower plate 3 Heat so that the temperature reaches 120 in 3 seconds 0 C. While the magnesium alloy lower plate 3 is being heated, heat the position where the upper surface of the magnesium alloy upper plate 2 needs to be riveted, so that the temperature reaches 150°C in 3 seconds. At this time, the contact surface of the magnesium alloy upper plate and the magnesium alloy lower plate The temperature is 115°C (slightly different according to the composition ratio and thickness of the magnesium alloy), and all heating is stopped, (such as figure 1 As shown, self-piercing riveting equipment uses rivets 1) to perform self-piercing riveting on magnesium alloy plates. ...

Embodiment 2

[0014] Embodiment 2: The method of locally heating the self-piercing riveting device for the magnesium alloy plate of this embodiment is: before the self-piercing riveting of the magnesium alloy upper plate 2 and the magnesium alloy lower plate 3, the position to be riveted on the lower surface of the magnesium alloy lower plate 3 Heat so that the temperature reaches 120 in 2 seconds 0 C. While the magnesium alloy lower plate 3 is being heated, heat the position where the upper surface of the magnesium alloy upper plate 2 needs to be riveted, so that the temperature reaches 150°C in 1 second. At this time, the contact surface of the magnesium alloy upper plate and the magnesium alloy lower plate The temperature is 120°C (slightly different according to the composition ratio and thickness of the magnesium alloy), and all heating is stopped, (such as figure 1 As shown, self-piercing riveting equipment uses rivets 1) to perform self-piercing riveting on magnesium alloy plates. M...

Embodiment 3

[0015] Embodiment 3: The method of locally heating the self-piercing riveting device for the magnesium alloy plate of this embodiment is: before the self-piercing riveting of the magnesium alloy upper plate 2 and the magnesium alloy lower plate 3, the position to be riveted on the lower surface of the magnesium alloy lower plate 3 Heat so that the temperature reaches 120 in 1.5 seconds 0 C. While the magnesium alloy lower plate 3 is being heated, heat the position where the upper surface of the magnesium alloy upper plate 2 needs to be riveted, so that the temperature reaches 150°C in 2 seconds. At this time, the contact surface of the magnesium alloy upper plate and the magnesium alloy lower plate The temperature is 125°C (slightly different according to the composition ratio and thickness of the magnesium alloy), and all heating is stopped, (such as figure 1 As shown, self-piercing riveting equipment uses rivets 1) to perform self-piercing riveting on magnesium alloy plates....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of self-piercing riveting processes, in particular to a local heating self-piercing riveting method for magnesium alloy plates. Before a magnesium alloy upper plate and a magnesium alloy lower plate are in a self-piercing riveting process, the position, needing riveting, of the lower surface of the magnesium alloy lower plate is heated, and the temperature is enabled to reach 1200 DEG C in 3s. While the self-piercing riveting lower plate is heated, the position, needing riveting, of the upper surface of the self-piercing riveting upper plate is heated, and the temperature is enabled to reach 150 DEG C in 3s. Then, the temperature of the contact surface of the magnesium alloy upper plate and the magnesium alloy lower plate is between 115 DEG C and 125 DEG C, all the heating is stopped, and the magnesium alloy plates are in the self-piercing riveting process. A hot anvil / laser is used for local heating and an infrared video camera is used for temperature measurement and control, so that the magnesium alloy plates can be heated to a temperature required by the self-piercing riveting process in a very short time, not only is the self-piercing riveting quality of the magnesium alloy plates ensured, but also the manufacturing efficiency is promoted, and wide application of the self-piercing riveting technology for the magnesium alloy plates in various industrial manufacturing fields is promoted.

Description

technical field [0001] The invention relates to the technical field of self-piercing riveting technology, in particular to a self-piercing riveting device for magnesium alloy plate thermal anvil / laser local heating. Background technique [0002] Magnesium alloys have high specific strength and specific stiffness, and have broad application prospects in the fields of aerospace and automobile manufacturing. Self-piercing riveting technology is a new thin-plate material connection technology that has developed rapidly in recent years. It is especially suitable for difficult-to-weld plates such as light alloys and composite materials. It is the most ideal replacement technology for traditional spot welding technology. In the self-piercing riveting process of magnesium alloy plates, the self-piercing rivets and the magnesium alloy plates undergo plastic deformation together to form a mechanical internal lock and achieve a firm mechanical connection. However, when the magnesium a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B21D39/02B21D37/16
CPCB21J15/025B21J15/08
Inventor 何晓聪
Owner KUNMING UNIV OF SCI & TECH