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本文根据电厂小口径管全位置自动焊的经验及存在问题,改进了钨极氩弧自动焊工艺,研制了一台晶体管电源的自动焊设备。焊接采用双机头来完成打底和盖面的二次成型工艺,文中详细分析了这种工艺的优越性。全位置焊接采用基准电流调节方式来控制整个焊接过程的热输入量,突破了以往全位置焊接中分点调节焊接规范的传统做法,不仅有利于简化自动焊设备的控制线路,而且为在电厂安装现场推广使用提供了有利条件。配合上述工艺,研制了一套大功率晶体管焊接电源,解决了这种电源的主结线选择、氩弧的引燃、调整管并联运用的电流均匀分配等技术问题。这种新工艺、新电源的研制成功和生产中的应用, 自动焊机线路简单、使用安全、调节可靠、性能优良,生产上应用已显示出它很大的经济效果。
According to the experience and existing problems of full-position automatic welding of small-caliber tubes in power plant, this paper improves the TIG welding process and develops an automatic welding equipment for transistor power supply. Welding using dual-head to complete the bottom molding and cover the secondary molding process, the article detailed analysis of the superiority of this process. The all-position welding adopts the reference current adjustment method to control the heat input quantity of the entire welding process, breaking the traditional practice of adjusting the welding specifications in the all-position welding in the past, which not only facilitates the control circuit of the automatic welding equipment but also facilitates the installation in the power plant On-site promotion and use provided favorable conditions. With the above process, a set of high-power transistor welding power supply has been developed to solve such technical problems as the main connection of the power supply, the ignition of the argon arc and the uniform distribution of current in parallel. This new technology, the successful development of new power supply and production applications, automatic welding line is simple, safe, reliable, good performance, production applications have shown its great economic effect.