Method for establishing and using forming limit diagram of laser tailor-welded blank
A technology of forming limit diagram and laser tailor welding, applied in laser welding equipment, welding equipment, special data processing applications, etc., can solve problems such as difficulty in establishing FLD, difficulty in obtaining primary and secondary strains, small weld width, etc., to avoid Difficult to measure effect
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[0030] Firstly, the specific steps of the present invention to establish the forming limit diagram of the laser welded blank are described.
[0031] A. If figure 1 As shown, the tailor-welded blank is mainly composed of strong-side base metal 10, welding zone material 30 (weld seam), and weak-side base metal 20. The direction parallel to the weld is taken as the Y direction, and the direction perpendicular to the weld is In the X direction, establish a coordinate system. The purpose is to distinguish two failure modes: when the Y-direction strain of the base metal on the weak side is greater than the X-direction strain, the welding zone material fails; when the Y-direction strain is smaller than the X-direction strain, the weak-side base metal fails; Generally speaking, there are generally only these two types of failure modes in the vicinity of the weld.
[0032] B. When the material in the welding zone fails, that is, the strain in the Y direction is greater than the strai...
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