For resistance spot welding, resistance projection welding, and resistance seam welding, the RMS current needed to weld a specific material of a specific thickness will be similar for MFDC as for AC. If all things are considered equal, where the only variable is the weld transformer type, the same KVA MFDC or AC transformer is […]
Often resistance welding operators report that their setup is exactly the same except that now the welds are different. They don’t realize that a seemingly irrelevant adjustment to the geometry of the welding setup can change the spring constant of the linkages applying electrode force to the part. While a change in the spring constant […]
Challenges in resistance welding can have potentially dire consequences if not fully and accurately addressed. Robert K. Cohen, CEO of WeldComputer, talks about some of the challenges and the advanced solutions now available. To learn more, download the full report.
Troy, NY – November 11, 2019 – WeldComputer Corporation is pleased to announce that Robert Cohen has been awarded the Elihu Thomson Resistance Welding Award by the American Welding Society (AWS). The honor, which recognizes individuals who have made outstanding contributions to the technology and application of resistance welding, will be awarded at AWS’ FABTECH […]
A number of factors contribute to resistance welding inconsistency, including: Inconsistent heat control Electrode force variations Part geometry/contact area variations Material hardness variations Oil on the part Other surface condition variations Conventional controls that apply the same heat regardless of what combination of prevailing conditions exists, result in inconsistent welds. When variations are severe enough, […]
Adaptive control regulates consistency of flash weld process while reducing power consumption. Most flash welding operations have high scrap rates and and power consumption due to the complexity and demands of the application. WeldComputer(R) inverter controls reduce energy demands, while providing for more precise flashing control. By adding monitoring and adaptive capabilities, flashing distance and upset […]
Benefits include regulating weld consistency, operating at fast production speeds, and improving weld quality By Robert K. Cohen Making a gas-tight seal with a seam welding machine involves making a series of overlapping spots. Each spot produced should be a fully formed nugget that is free of expulsion. Using too little heat produces an undersized spot, which can cause a leak. Using too much […]