本文设计了一套应用于镀锌板激光填充粉末焊接的喷嘴，并利用纹影仪等手段研究了该喷嘴的最佳保护气流量和最佳粉末束拘束度参数；

This paper designs a new kind of nozzle used for laser welding of zinc-coated steels with metal powder and studies the better modality of shielding gas and the powder beam with schlieren device.

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根据铸件结构特征和不同区域拘束度的不同，设置不同的反变形系数，对原始模型进行反变形处理。

Different anti-deformation coefficients were set on the original mode, according to casting structural features and binding in different regions.

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