【摘要】 本文从理论上研究了重力方向变化对激光加工的影响。熔池有一沿重力方向移动的趋势，不同的重力方向，熔池有不同的表面形状。熔池表面温度变化率越小，这些效果越明显。更多还原

【Abstract】 The effects of variety of gravity direction on laser processing are studied in the paper.The melting zone has a tendency moving along with the gravity direction,so it has a different surface when the gravity direction is different.The lower the gradient of temperature on the surface,the clearer these effects.更多还原