Besides, centering and tack welding by laser beam should be avoided as centering point and tack-welding point can influence weld quality largely.
但焊缝质量受激光对中点和点焊点的影响很大，应尽量避免采用激光对中及点焊。
2
Therefore, the weld joint is the most significant point in the weld-quality-controlling.
因此，该处对于焊接质量的控制就成为很重要的位置。
3
According to the model of the welding position, giving a weld seam point, the weld orientation then can be resolved from the weld rotation Angle and the weld slope Angle.