Trajectory planning of laser cladding remanufacturing for complex shaft shaped part

It is difficult to achieve trajectory planning and automatic programming for the remanufacturing of complex shaft shaped part. Aiming at this case, reverse measurement was completed based on non uniform rational B-spline (NURBS) curve for surface of part. A constant arc increment interpolation method was presented for laser cladding remanufacturing and the Newton iteration algorithm based on Romberg integral method was proposed and designed. A program based on 6 DOF robot was developed for trajectory planning and computer aided programming. The morphology, microstructure, thickness and micro-hardness of layer were tested and analyzed. It is observed that, the cladding layer and substrate have a good metallurgical bond, layer thickness is uniform, when the max laser beam tilt angle from the horizontal is 42, cladding thickness decreases 0.034 mm compared with maximum thickness, the micro-hardness is significantly higher than the substrate. Experimental results show the effectiveness of the method proposed.