长春汽车工业高等专科学校 毕 业 实 践 报 告 题目/实践名称NBC—400 二氧化碳焊机的结构与维修 专业 / 班级 学 生 姓 名 学 号 企业指导教师 校内指导教师 起 止 时 间 2011 09-2012 05 实 习 单 位 - 1 - 目录 第一章 绪论························································2 1.1引言··············································2 1.2实践单位的基本情况········································3 第二章 NBC—400二氧化碳焊机的用途描述·······························4第三章NBC—400二氧化碳焊机结构·····································5 3.1NBC——4 0 0 二氧化碳焊机的组成································5 3.2 NBC——400二氧化碳焊机的工作原理···························6 第四章NBC——400二氧化碳焊机故障点·································9 第五章NBC——400二氧化碳焊机的使用与维护··························12 第六章NBC——400二氧化碳焊机故障排除记录··························14 参考文献···························································16 附录·······························································17 致谢·······························································18 - 2 - 中 文 摘 要 NBC—400型二氧化碳气体保护半自动电焊机性能稳定，抗干扰能力强，送丝速度不受电网电压及其它因素影响，并且具有电铆功能。因此在电气性能、焊接功能，方便使用维修等方面更加完善。被广泛应用于汽车、造船、冶金、机械、煤炭机械等行业的焊接生产。 本文主要论述其结构与其维修方法及维修点。 关键词：结构；原理；维修方法；维...
