Supercharge Your Innovation With Domain-Expert AI Agents!

A method and apparatus for joining metals using self piercing rivets with preheating

A technology of equipment and components, which is applied in the field of connecting metal and equipment with preheated self-piercing rivets, can solve the problems of difficult cycle time tools, difficult storage, and reduced technical and economic feasibility

Inactive Publication Date: 2009-07-29
FOUNDRY CRC LTD
View PDF3 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are several problems with this approach, including high power requirements, long cycle times and inherent difficulties with tools that are bulky and difficult to house
These issues reduce the economic viability of the technology

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 method and apparatus for joining metals using self piercing rivets with preheating
  • A method and apparatus for joining metals using self piercing rivets with preheating
  • A method and apparatus for joining metals using self piercing rivets with preheating

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0167] To produce crack-free joints, laser power and dwell time were varied to locally preheat the magnesium alloy component on one side of the mold to a temperature suitable to enhance its formability. Therefore, according to the predetermined heating time up to 3.6 seconds and Figure 3AVarious combinations of the elements shown in exemplarily determine the laser power output. exist Figures 3B to 3E The external and internal appearances of the corresponding joints are shown.

example 2

[0169] Figure 5A A typical laser preheating and SPR cycle to join two thick components is shown. The temperature curve shows the temperature drop after closing the shutter; the subsequent peak in temperature is due to the SPR tool coming into the measurement range of the infrared camera's view. Therefore, IR temperature data after SPR initiation does not indicate component temperature during joining, but provides information about the multi-stage SPR method that is consistent with clamping and rivet adjusted pressure data.

[0170] The total duration of the clamping and rivet setting phases of the SPR method was thus determined as an average of 1.47 ± 0.03 seconds over several trials of laser-assisted SPR, and by reducing the time between the start of clamping and the start of rivet setting. The time delay was reduced to 1.29 ± 0.07 seconds in subsequent trials. This can be accomplished by changing a setting parameter of the programmable logic controller of the SPR device. ...

example 3

[0179] A number of different pairs of components were joined under different conditions with and without the use of a laser to improve the formability of at least a portion of one component and its effect was evaluated. Figure 9 Images comparing joints formed with and without laser are shown in . Utilize a ratio Figures 3B to 3E Rivets of longer and / or stiffer rods as shown in Example 1 create joints. It should be noted that not only is cracking of the base element prevented when using the laser to improve the formability, but also when using the laser there is better contact of the rivet head with the surrounding material.

[0180] In Fig. 10, some static lap shear test data are presented based on single point joints for different element combinations produced using different rivets and dies. Figure 10 shows the variation in producing laser assisted SPR joints to meet strength requirements.

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

A method for joining elements together, the method comprising the steps of: positioning the elements relative to one another; enhancing the formability of at least a portion of at least one of the elements using a laser; and joining the elements together using a mechanical fastening method.

Description

technical field [0001] The invention relates to a method for joining together components, especially metal components. The invention also relates to a device for joining elements together. Background technique [0002] Forming joints between metal sheets that are strong and of sufficient aesthetics is a current problem in some industries, especially the automotive industry. One area where joints present significant problems is when a joint is formed between two dissimilar metal sheets. [0003] One technique widely used to join metal sheets in mass production is spot or butt welding, which may or may not involve the use of lasers. Laser welding is especially suitable for joining plates of different thicknesses and producing clean and narrow joints at high speed. However, laser welding has many problems. One problem is that when using such techniques to join magnesium-aluminum alloys (as with any technique that involves at least some melting), laser welding produces a har...

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 Applications(China)
IPC IPC(8): B21J15/00B21J15/02B21J15/10
CPCB23K26/421B21J15/08B21J15/025B23K26/60Y10T29/5191Y10T29/49947B21J15/36B21J15/285B23K26/70B21J15/10
Inventor 伊冯娜·C·杜兰德特宋维前布赖恩·登普斯特米兰·布兰特斯图尔特·布莱克特
Owner FOUNDRY CRC LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com