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WJM Technologies
P.O. Box 4018
Cerritos, CA 90703
Phone: 562-743-7576
Sales Contact
Girish Kelkar
President
Recent Content on The Fabricator for WJM Technologies
- From The Fabricator
Mode of least resistance
- By Girish Kelkar
- Aug 8, 2007
- Shop Management
- Article
With the advent of transistorized controls in resistance welding, power supplies are available in which feedback can be used to control current, voltage, or power delivered. The use and benefits of these control modes are not well understood, leading to underutilization of the technology. It is important to understand the fundamentals of the control modes as applicable to DC and inverter power supplies and the special situations that you might encounter in their application.
- From The Welder
Why use multiple-impulse resistance welding?
- By Girish P. Kelkar, Ph.D.
- Nov 9, 2004
- Shop Management
- Article
Multiple-impulse welding isn't uncommon, but it's not usually the first choice for most resistance welding applications. However, experiments with this type of resistance welding demonstrate that it has a wider range of applications, especially when its modified heat balance is understood