microJOINING SOLUTIONS

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Process Validation

·         microJoining Solutions recognizes that DoE optimized welding parameters do not include time as a controlled input.  The only way to ensure that a welding process is completely understood is to weld real parts.

·         For resistance welding, the electrode tips change geometry and acquire part material and oxides.  This buildup shifts the heat balance, which in turn degrades the output responses.  In general tensile and peel strengths become weaker and fatigue or life cycling maximum numbers decrease with increasing time.

·         For laser welding, the focusing lens cover glass gradually becomes covered with very small weld particles over time.  These particles reduce the actual weld energy applied to the parts.  This reduction in weld energy degrades the output response values.

·         Weld monitor data gathered during the validation process can be tested for correlation with the output responses using statistical tools.  Assuming one or more statistically significant correlations exist, weld monitor limits can be applied to the welding process to help ensure weld quality.

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·         Tel:       001-626-444-9606

·         Fax:      001-626-279-7450

·         Email:   mjs@microjoining.com

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