Selective laser melting deformation control method for variable-density support

The invention discloses a variable-density supported selective laser melting deformation control method, which comprises non-solid supporting structures and solid supporting structures, the non-solid supporting structures are added at the bottom, the suspension structure and the hollow structure of a part, and the solid supporting structures are added at the edge, the thin wall and the non-uniform distribution of material organization structures of the part. The non-solid supporting structures and the solid supporting structures exist in a staggered mode, the heat transfer condition in the part forming process is changed by adjusting the distribution density of the non-solid supporting structures and the solid supporting structures in the selective laser melting part forming process, and the residual stress size and distribution characteristics after part forming are adjusted. According to the method, through a variable-density supporting mode, the problem of how to add the support during selective laser melt