Selective laser melting forming method for large-size double-layer thin-wall heat shield part

• Main Authors: WANG HUANCHEN, WANG JIAN, DONG WENQI, XUE LIYUAN, MA HUIJUN
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2024
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

The invention relates to a selective laser melting forming method for a large-size double-layer thin-wall heat shield part, and belongs to the technical field of metal additive manufacturing. The part is vertically placed, the pointing direction of the top tip of the part is the same as the powder laying direction of a scraper of forming equipment, and the two columns of studs are kept perpendicular to the base plate; the lower surface of the part is provided with a shape follow-up cavity structure self-support; the parts are placed in a mirror image type vertical placement mode, and a first long-strip-shaped plate-shaped support is arranged between the two parts to connect the two parts. A plurality of second strip-shaped plate-shaped supports are arranged on the studs; an inclined grid support is arranged on one side of the stud on the surface of the part; slicing and filling; part forming; stress relief annealing is conducted after powder cleaning, the part is separated from the base plate through linear c