针对复杂自由曲面零件激光再制造中在线示教加工路径存在的问题，进行了三维激光熔覆再制造修复路径的研究，提出了基于等距平行截面法的修复轨迹自动生成算法。利用任意等距平行截面与三角网格模型求交确定激光束扫描点位置；估算出三角网格中每个顶点法矢后，通过对交点所在边的两顶点法矢插值得到交点的法矢，确定了在加工点激光束的姿态。应用实例表明，该算法取得了良好的加工效果，能够达到实用化要求。

Repair path of 3D laser cladding remanufacturing is studied and generation algorithm automatically of repair trajectory is proposed based on equidistant parallel sections in order to conquer the shortages using on-line teach processing path for damaged parts of complex free-form surfaces in laser remanufacturing. The positions of laser beam scan points are decided according the intersection points of any equidistant parallel section planes and triangular mesh; the normal vector of the intersection point is calculated by interpolation to the two vertices′ normal vector after each vertex′s normal vector is acquired, thus the laser beam′s posture is obtained at the processing point. Practical experiments demonstrate that satisfying results are acquired by using this method, which has been applied in laser remanufacturing system.