Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Spot welding method for high strength steel sheet

A high-strength steel plate and spot welding technology, which is applied to welding power sources, welding power sources, welding equipment, etc., can solve problems such as low productivity, prolonged welding time, and difficult industrial locks

Inactive Publication Date: 2015-06-24
HYUNDAI MOTOR CO LTD +1
View PDF7 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this technique is difficult to apply to industrial field locks due to low productivity due to prolonged welding time
Also, when there is a cooling time between pulses, only guidance is given on the soldering temperature and not on the soldering time, so there are many problems when the guidelines of conventional techniques are applied in practice

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
  • Spot welding method for high strength steel sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that when used in this specification, the term "comprising" refers to the presence of stated features, integers, steps, operations, elements and / or components, but does not exclude one or more other features, integers, steps, The presence or addition of operations, elements, components and / or combinations thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0013] Unless otherwise indicated or obvious from context, as used herein, the term "about" is understood as within a range of normal tolerance in the art, for example within two standard deviations of the mean. "About" can be...

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 spot welding method for a high strength steel sheet is provided. The method includes a first pulse step for applying electric current of about 8 to 9 kA about 1 to 3 cy and a first cooling step for cooling for about 1 to 3 cy. In addition, the method includes a second pulse step for applying electric current less than the electric current applied in the first pulse step and a second cooling step for cooling for about 1 to 3 cy. A third pulse step includes applying electric current greater than the electric current applied in the second pulse step.

Description

technical field [0001] The present invention relates to a spot welding method for a high-strength steel plate having a maximum nugget diameter using multi-pulse welding conditions. Background technique [0002] Recently, with the increasing use of high-strength steel sheets in industrial places, maintaining the nugget diameter of resistance spot welding of ultra-high-strength galvanized steel sheets, such as 120kgf class galvanized steel sheets, has been recognized as a difficult problem. In single-pulse welding, due to the excellent heat generation of steel, spatter is generated, making it difficult to obtain a sufficient nugget diameter. At the same time, when using conventional multi-pulse welding, many welding variables are applied, but may not be suitable for industrial locations. Therefore, selecting the proper welding conditions may be more complicated. [0003] While conventional techniques use three types of pulses, the role of each pulse and the correlation among...

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): B23K11/11
CPCB23K11/11B23K2103/04B23K11/16B23K11/166B23K11/241B23K11/24
Inventor 柳志泓洪承贤朴泳度金载源
Owner HYUNDAI MOTOR CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com