【作者】 段然；

【导师】 殷树言； 刘嘉；

【作者基本信息】 北京工业大学 ， 机械电子工程， 2006， 硕士

【摘要】 众所周知,TIG焊焊缝保护效果好,焊缝金属纯净,特别适用于焊接易氧化的有色金属及其合金。随着数字技术和现代通信技术的迅速发展,为数字化技术在焊接领域的逐步渗透和提高焊接设备的技术含量提供了广泛的应用前景。而数字化的实现更使得弧焊电源输出信号的幅值控制精度得到显著的提高。采用F2812作为核心控制芯片,该芯片具有较强的事件管理和数据处理能力,同时片上还集成了丰富的外设资源,能够提高系统的集成度、抗干扰性能,并且降低成本。在焊接电源走向数字化的过程中,由于工作环境的特殊性,其实现相对困难。尤其是数字化TIG焊接电源,更是对抗干扰环节提出更高的要求。虽然传统的高频引弧技术成功率比较高,但是,高频信号对于控制系统的干扰却一直没有得到很好的解决。而DSP作为控制芯片更是不允许出现高频干扰信号,否则运行中的程序极容易被干扰。本设计采用高压脉冲引弧取代高频引弧以设法降低高频信号的干扰。经实验结果证明,该焊机输出特性满足技术指标的要求,焊接过程中不出现误动作,引弧成功率较高,焊接性能稳定,对周围环境有一定的抗干扰能力。更多还原

【Abstract】 As is known to all, the protecting effect of TIG welding is fine. The metal in welding bead is pure. Especially fit for the welding of non-ferrous and alloy.With the rapid development of the digital and modern communication technology, It’s provide a great space for digital technology used in the field of welding and improving the technology content of welding equipment. The equipment adopts DSP(F2812) as main control processor. It has a better capability of EV and data processing, and abundant peripheral are integrated in it. So the system which controlled with DSP(F2812) can enhance the integration, the ability of anti-interference and reduce the cost.During the process of the welding power combined with the digital technology, because of the special surrounding, it’s hard to acheived especially for TIG digital welding machine. It’s required the higher level for anti-interference. Although the traditional high-frequency ignite method has a high success ratio, the high frequency interrupt signal has not been resolved. As the control unit, DSP can’t afford to the existence of the interrupt signal. This project use high voltage ignitor to solve the problem of interrupt.Proved by experience, the output characteristic of this welding can be suitable to tech-guideline, and the inverter can work normally during arc welding process. The success ratio of ignition is also good enough.更多还原