为促进塑料门窗优质高产、全面普及,研制出新型的全自动塑钢门窗三位热熔焊接机。文中阐述了总体方案;解决了研发过程中的一些技术问题,提高了机器的自动化水平和可靠性;采用正交试验法确定了该机最优焊接工艺参数;最后介绍了“┏┳┓”型焊接实例,并分析其焊缝形貌特征。该机适用于塑钢门窗焊接工序,具有结构紧凑、自动高效等优点。 To promote high-quality plastic doors and windows of high yield, universal access to the development of new automatic doors and windows of plastic three hot-melt welding machine. In this paper, the overall scheme is explained; some technical problems in the R & D process are solved, the automation level and reliability of the machine are improved; the optimal welding parameters are determined by orthogonal test; finally, "Type of welding examples, and analysis of the weld morphology. This machine is suitable for steel doors and windows welding process, with the advantages of compact structure, automatic and efficient.