HYBRID DEPOSITION AND MICRO ROLLING MANUFACTURING METHOD OF METALLIC PARTS

摘要

To conquer the bottleneck problems of cracking, deformation, low accuracy and performance in existing additive manufacturing (AM) process, a new hybrid direct manufacturing method of metallic parts which integrates freeform deposition with micro rolling is proposed in this paper. The principle, devices and simulations are introduced and the comparison with Freeform Deposition Fabrication method are made through experiments, showing that hybrid manufactured parts has distinctive features of higher accuracy and better microstructures. The tensile strength is increased by 33% for stainless steel while the elongation percentage is improved more than 2 times. By using the Φ1.6mm wire in a feed rate of 1060mm/min, the deposition rate can get to 10kg/h. This method is appropriate for fabricating large-scale metal parts with outstanding quality, efficiency and low cost.