Backing weld procedure technique of all - position narrow gap and thick - walled pipe welding is developed about all - position single - pass welding section analysis , wire feeding behavior , weld arc length , welding current analysis , procedure and joint test . the achievement has general guide meaning to producing and testing all - position welder 从单焊道全位置区段、送丝行为、焊接弧长(电压) 、电流行为分析、工艺试验和接头检验等几方面介绍管道全位置打底焊工艺特点，其研究成果对全位置焊接机的制造和调试具有普遍指导意义。
The results indicate that if the value of press stress is over certain figure , press stress and al plate ’ s thickness have little influence on sawtooth distortion for the same kind of sawtooth ; sawtooth distortion is well - regulated under static press , while it is irregular under impact press . bottom coating make great influence on bond strength of samples which can improve the value remarkably ; bonding mechanism of clad steel is mechanism of mechanical effect that sawtooth which is hooked occludes with al plate 结果表明：同种齿型，当压应力大于一定的值时，压应力和覆板的厚度对齿形的变化影响不大；静压下齿形变化比较规则，锯齿顶端向一侧弯曲成钩状；冲压下齿形比较凌乱，锯齿的顶端没有明显的变形；后处理对试样的结合强度影响很大，打底试样由于粘结层的作用，结合强度较高；机械作用机制是复合钢板的主要复合机理，锯齿弯曲成钩状和铝板形成机械咬合。
The corporation has introduced advanced vacuum equipments , quality testing equipment of pressure cooker , sandwich bottom impact equipment , other specialized facilities from overseas . we specialized in manufacturing and developing six safety design stainless steel pressure cooker , vacuum mugs , many kinds of kitchenwares , which exceed 500 varieties , our marketing network and customer service center spreading all over the major cities in domestic 公司引进进口先进的真空印花打底机等设备专业从事不锈钢真空杯纳米杯六保险打底不锈钢压力锅等各类厨餐具等500多个品种的生产及开发，销售网络及客户服务中心遍布国内各主要城市。
Abstract : backing weld procedure technique of all - position narrow gap and thick - walled pipe welding is developed about all - position single - pass welding section analysis , wire feeding behavior , weld arc length , welding current analysis , procedure and joint test . the achievement has general guide meaning to producing and testing all - position welder 文摘:从单焊道全位置区段、送丝行为、焊接弧长(电压) 、电流行为分析、工艺试验和接头检验等几方面介绍管道全位置打底焊工艺特点，其研究成果对全位置焊接机的制造和调试具有普遍指导意义。
