Patent ID: 9089921
Filing Date: 2015-07-28
Classification: B23K,G09B

Abstract:
1. A system for training students learning a welding process, the system comprising a plurality of welding stations, each welding station operable to accommodate one student and including an electric arc welder with a monitor for monitoring the electric arc welder as the student uses the electric arc welder performing the welding process by creating actual welding parameters between an advancing wire and a workpiece to form a weld, said welding process being defined by a series of rapidly repeating wave shapes of command signals for said welding parameters, each wave shape constituting a weld cycle with a cycle time, wherein said monitor comprises: logic for segmenting each of said wave shapes into a series of time segmented states; logic for selecting a specific wave shape state; logic for reading a selected weld parameter occurring in said specific wave shape state at an interrogation rate over a period of time repeated during the welding process to obtain a data set for said selected weld parameter; logic for calculating a quality value of at least one quality parameter for said selected weld parameter from said data set for each period of time; logic for comparing each quality value to an expected quality value to determine if a difference between said quality value and said expected quality value exceeds a predetermined threshold; logic for weighting said quality value with a magnitude weight based on said difference, and weighting said quality value with a time contribution weight based on a time contribution of said state to its wave shape, if said difference exceeds said threshold; and logic for determining a quality score for said weld based on all of said quality values, including any weighted quality values, obtained during said welding process.