Laser additive device for inside-laser coaxial wire-feeding

• Main Authors: ZHAO YANHUA, LU LAIXIAO, WANG QIAN, WANG JIAMING, YAN YUQIN, TIAN WENHAO
• Format: Patent
• Language: Chinese; English
• Published: 23.10.2020
• 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; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention discloses a laser additive device for inside-laser coaxial wire-feeding. The device is mainly composed of a cylinder, a holographic optical element I, a holographic optical element II with a central through-hole, a wire feeding tube, a cooling system, a positioning support element mounted above the cylinder and a coaxial laser head portion, and the device is characterized in that anincident laser beam is diffracted by the holographic optical element I to form two beams which are separated from each other in the space and are diffracted to the surface of the holographic optical element II, then is diffracted again by the holographic optical element II to form an annular-cone-shaped beam with a hollow light-free area, the wire feeding tube is inserted into the light-free areafrom a through hole of the holographic optical element II, so that the beam, a wire and shielding gas are completely coaxial and perpendicular to an additive forming surface. According to the device,the diffraction effect of t