基于ARM的全数字管板自动化焊机

Research on full digitalized automatic tube-plate welding system

大、中型换热器(冷凝器)中数量庞大的换热管与管板之间的角接接头环形焊缝的质量是其制造质量的关键,必须采用全位置自动化焊接工艺.文中设计了一种基于ARM低成本、全数字管板自动化焊机.主电路采用全桥拓扑结构,以32位Cor-tex-M3内核的LM3S8971作为焊接过程的控制核心,实现焊接过程的全数字控制;同时设计了ARM+CPLD双芯结构的数字面板,实现了人机交互的数字化;进行了系统功能测试和工艺试验.结果表明,系统具备良好的性能,能满足换热器管板全位置自动化焊接生产的需要.

The circumferential weld quality of the enormous corner joints between the heat exchange tube and plate in the medium-sized or large scale heat exchangers（condensers） is the key to ensure the manufacturing quality of heat exchangers,which need full position automatic precise welding technology.A full digitalized and low cost tube-plate welding power supply based on ARM（advanced RISC machines）was proposed.The full bridge inverter topology was adopted in the main circuit.The LM3S8971 with 32 bits Cortex-M3 kernel was used as the core of the process control of welding power source,and the full digitalization control of the welding process was realized.The digital control panel of the welding power source based on ARM CPLD（complex programmable logic device） was designed to make man-machine interactions really come true.The function test and experimental research on the welding power supply demonstrated the excellent performance of the system and fulfilled the demand of the full position automatic tube-plate welding process of heat exchanger.