关键词: 工业机器人, 熔融沉积成形, 红外热源辅助, 速度匹配, 结合强度

Abstract: To solve the key problems of FDM for open-space industrial robots, the FDM equipment and control system were developed based on a 6-axis articulated robot. The printing head with assisted heating was designed, and the printing control system and robot control system were developed. By proposing the synchronous matching method of printing head extrusion speed and robot motion, the stable operation of the robotic FDM equipment was realized. Then the infrared heat source-assisted industrial robotic FDM forming method was proposed, and the influence law of the auxiliary heat source parameters on the macroscopic mechanics properties and surface roughness of the fabricated parts were studied through processing tests, and the enhancement mechanism was analyzed through microstructure characterization. The results show that under the open-space environment, the infrared heat source may effectively increase the substrate temperature, significantly enhance the diffusion entanglement of molecular chains at the strand interface and improve the interfacial bonding strength, resulting in a 17.6% increase in the interlayer bonding strength and a 58% reduction in the surface roughness of the parts, which verifies the feasibility and high efficiency of the infrared heat source-assisted open-space industrial robotic FDM method.

Key words:  , industrial robot, fused deposition modeling（FDM）, infrared heat source-assisted, velocity match, bonding strength