According to GB4156-84 "the method of metal cupping test", develop the cupping grips that can be used in servo universal testing machine and computer control pressure testing machine.

Using statistical backward elimination method, the mathematic model was established for the relativity between cupping test value (ie) and mechanical properties of 9 kinds of steel sheet.

The results show that beam offset can greatly affect the macro performance of Laser tailor-welded weld , then affect the cupping Test value and tensile strength unconspicuous.