Research of Process Parameters of Screwy Thin-Walled Part with Coaxial Inside-Beam Powder Feeding Accumulation

Based on the technology of laser cladding manufacturing process with coaxial inside-beam powder feeding, screwy thin-walled part is accumulated on the substrate of 45# steel by controlling the angle of inclination, scanning paths, Z axis incremental and power. Through the inclined wall accumulation model and a large number of tests, limiting angle of the cladding accumulation is obtained. According to the forming process of screwy thin-walled part, two scanning paths are designed, which include continuous laser scanning between each layer and intermittent laser scanning between each layer, the better scanning path is gained by analyzing each path. A good forming part is obtained by controlling Z axis incremental and power simultaneously. The forming part is higher with smooth appearance and lower roughness, and wall thickness is uniformed.