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

Resistance spot welding method and method for manufacturing welded member

A technology of resistance spot welding and welding conditions, which is applied in the direction of resistance welding equipment, welding power supply, manufacturing tools, etc., can solve the problem that the nugget diameter cannot be ensured, and achieve the effect of improving operation efficiency

Active Publication Date: 2020-10-13
JFE STEEL CORP
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] However, in the technologies described in Patent Documents 1 and 2, there is a problem in that appropriate welding conditions are considered to be changed depending on the presence or absence and magnitude of the disturbance, so that it is impossible to prevent the dispersion from occurring when more than expected plate gaps and shunts occur. Ensure the desired nugget diameter under the conditions

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
  • Resistance spot welding method and method for manufacturing welded member
  • Resistance spot welding method and method for manufacturing welded member
  • Resistance spot welding method and method for manufacturing welded member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0137] For the plate group of 2 or 3 overlapping metal plates shown in Table 1, test welding is carried out under the conditions shown in Table 1, and then, for the 2 or 3 overlapping metal plates shown in Table 2 The plate group of plates was subjected to main welding under the conditions shown in Table 2 to produce welded joints (welded parts).

[0138] Here, trial soldering and main soldering are performed in such figure 1 with figure 2 The unperturbed state is shown as well as Figure 3-6 The simulations shown were performed under the perturbed state. In the figure, symbols 11, 12 and 13 are metal plates, 14 is an electrode, 15 is a spacer, and 16 is a welded point. It should be stated that in image 3 with Figure 4 Among them, spacers 15 are inserted between the metal plates 11-12 and between the metal plates 12-13, and clamped from above and below (not shown), thereby providing gaps having various gap thicknesses tg. It should be noted that the plate gap distance...

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

In the present invention, a main welding and a test welding which precedes the main welding are performed, the test welding being performed under two or more welding conditions. In the test welding, apressing force parameter from the start of pressing of a material to be welded until a set pressing force is reached prior to the start of energization, a temporal change curve of the instantaneous heating value, and a cumulative heating value are stored for each welding condition. In the main welding, the material to be welded is processed under the same conditions as in the test welding prior to the start of energization, and the pressing force parameter at this time and the parameter stored for the test welding are compared for each welding condition, whereby a temporal change curve of theinstantaneous heating value and a target value for the cumulative heating value are set, and adaptive control welding is performed in which the energization amount is controlled in accordance with the target value.

Description

technical field [0001] The present invention relates to a resistance spot welding method aimed at stably securing a nugget diameter without causing dispersion, especially when the influence of a disturbance such as a shunt or a plate gap is large. Background technique [0002] In general, the resistance spot welding method, which is one of lap resistance welding methods, is used to join overlapping steel plates. [0003] In this welding method, two or more overlapping steel plates are clamped and pressed from above and below with a pair of electrodes, and a high-current welding current is energized between the upper and lower electrodes for a short time to join. The resistance heat generated by the high-current welding current produces spot-like welded parts. This point-shaped welded portion is called a nugget, and is a portion where both steel plates melt and solidify at the contact position of the steel plates when current is passed through the stacked steel plates. Thro...

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
IPC IPC(8): B23K11/11B23K11/24
CPCB23K11/11B23K11/24B23K11/115B23K11/255B23K11/257
Inventor 泽西央海松田广志池田伦正
Owner JFE STEEL CORP
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