The invention discloses a method for optimizing
metal parts of a SLM formed overhanging structure. The method comprises the following steps of 1, optimization of a spatial position; 2, optimization ofa support structure; and 3, optimization of local energy. According to the method, by optimizing the placing positions of the
metal parts, the number of the overhanging structures can be reduced, theforming angle of key parts of the overhanging structure is increased so as to improve the forming quality, and the adding amount of supports can be effectively reduced; then the support structure isoptimized, the multiple cross supports with hollow thin walls provided with saw teeth are adopted to form a net-shaped structure, the supporting strength requirement is met, meanwhile, the
powder using amount and the forming time required by supporting forming can be reduced, and the
machining efficiency is improved; and then when the overhanging structure is formed, the scanning speed is improvedproperly or the
laser frequency is reduced according to the size of the inclination angle of the overhanging structure so as to reduce input of local energy, lower the warping deformation trend and reduce
slag hanging amount, and finally, a
metal part overhanging structure meeting the requirements of high forming precision, small deformation and low
surface roughness is obtained.