Resistance spot welding monitors and checkers measure the electrical and mechanical aspects of the welding process; they analyze weld quality enabling the user to make adjustments and improvements resulting in process stability, and, ultimately, improved yields. Here’s a quick look at the three most important reasons to consider adding a weld monitor or weld checker to your resistance welding line:
"Ugh - my battery just died!" "Can I use your charger?" "Mind if I recharge my phone?" Batteries are everywhere, and we've become increasingly dependent on them in many aspects of our daily lives: portable electronic devices, cordless power tools, energy storage, and hybrid and EV cars. Thus, the demand to manufacture batteries that meet or exceed quality and production requirements for these products, is great.
Resistance spot welding, micro TIG welding, and laser welding processes all enable high quality volume production. The selection of one technology over another is usually made based on the application's specific requirements and the alignment of the technology to these needs.
You've been successfully running the same resistance spot welding program for days - months - years when all of a sudden it stopped working. What do you do? Where should you start? When troubleshooting a problem with your resistance welding process, we've learned that it's best to start with the materials and move back toward the power supply. Troubleshoot using 7 simple steps, in this order:
Battery tabs seem to have been getting thicker and more conductive over the last several years, as customers seek better performance and higher currents from their battery packs. These thicker battery tabs are usually made of nickel, but nickel-plated copper tabs are gaining in popularity due to their higher conductivity. We’ve had success welding the thicker nickel tabs, but have found the nickel-plated copper to be very difficult to weld. How to overcome that? Add slots and projections to the tab design to focus the current and minimize current shunting. Welding success also depends, in part, on the battery itself; those with thick caps can easily handle the high force and current needed to weld the thicker tabs. If the battery caps are too thin, however, they may get deformed or blown through.
I recently posted a blog about closed loop welders and how you can get the most out of using them, and it occurred to me that some of you may not be familiar with the different resistance spot welding power supply technologies, how they work, and what they can be used for. So here is a short description of the four different types, including both closed loop and open loop designs.