On current control method for single-phase AC resistance spot welding

2012 ◽  
Author(s):  
Kang Zhou ◽  
Lilong Cai
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Single Phase ◽  
Control Method ◽  
Current Control ◽  
Resistance Spot

Application of Current Gain Compensation Method in Quality Control of Resistance Spot Welding of Galvanized Steel Plate

2010 ◽  
Vol 26-28 ◽  
pp. 401-404
Author(s):  
Bin Wan ◽  
Xin Bin Hu ◽  
Shi Jie Dong ◽  
Zhong Hou Liu ◽  
Mao Zhang ◽  
...  
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Steel Plate ◽  
Control Method ◽  
Galvanized Steel ◽  
Current Gain ◽  
Current Step ◽  
Resistance Spot ◽  
Welding Spot ◽  
Gain Compensation

In this paper, the control method of current gain compensation for welding is adopted. Precise current gain curves (i.e., current step curves) in resistance spot welding of galvanized steel plated are discussed and drawn. By analysis of failure of electrode cap, it indicates that new current step curve ensure that qualified welding spot nugget dimension is acquired. The welding spot is high in strength, stable and reliable in quality. It is superior to original current step curve.

A method of measuring the heat generation parameters in the resistance spot welding in single phase AC machines

2007 ◽  
Vol 21 (5) ◽  
pp. 380-383
Author(s):  
A.S. Klimov ◽  
A.A. Gerasimov ◽  
A.N. Antsiborov ◽  
M.S. Goncharov
Keyword(s):  
Heat Generation ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Single Phase ◽  
Ac Machines ◽  
Resistance Spot

Experimental Characterization of MFDC/CHC Resistance Spot Welding

2005 ◽  
Author(s):  
Wei Li ◽  
Daniel Cerjanec ◽  
Gerald A. Grzadzinski
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
New Technology ◽  
Welding Process ◽  
Current Control ◽  
Constant Current ◽  
Dramatic Improvement ◽  
Resistance Spot ◽  
Target Energy

Resistance spot welding is widely used for joining sheet metal materials in the automotive industry. Most of the existing resistance spot welding systems are single-phase AC-based, and with constant current control. The medium frequency DC (MFDC) system with constant heat control (CHC) is new technology in the resistance spot welding industry. This system promises dramatic improvement on the spot weld quality. However, many of the CHC features are still not known and need to be explored. This paper presents an experimental study on a new MFDC/CHC spot welding system. The goal is to characterize the MFDC/CHC welding process in terms of the process parameters, including the target energy level, force, and welding time. Real time process signals such as force, current, and tip voltage were also collected and analyzed to compare with the traditional spot welding process.

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