Petroleum and natural gas industries . non - destructive testing methods of steel tubers for pressure purposes . radiographic testing of the weld seam of submerged arc - welded steel tubes for the detection of imperfections 石油天然气工业.承压钢管无损检测方法.埋弧焊钢管焊缝缺欠的射线检测
Firstly , backing with double - sided in - phase welding , welding method is gtaw . secondly , after filling outside one layer , welding with saw . finally , weld the inside with saw 先用双面同步焊打底，焊接方法为钨极氩弧焊；然后外侧用焊条电弧焊填充一遍后再用埋弧焊焊接；最后用埋弧焊焊接里侧。
Petroleum and natural gas industries . non - destructive testing methods of steel tubers for pressure purposes . ultrasonic testing of the weld seam submerged arc - welded steel tubes for the detection of longitudinal and or transverse imperfections 石油天然气工业.承压钢管无损检测方法.埋弧焊钢管焊缝纵向和或横向缺欠的超声波检测
The gas - shielded arc welding materials can be classified mainly into solid wires and flux - cored wires ( fcws ) , and of these wires , fcw has been increasing in uses year by year because of its excellent workability and efficiency 自药皮焊条开始焊接材料已发展成为更高效的埋弧焊焊材和气保焊焊材，并能更容易地结合自动化焊接和机器人焊接。
Wuxi liantong welding machinery co . , ltd is located in beautiful strand of taihu lake - - - - - - - wuxi , our company specialized in producing various series of covered arc weld in weld system for many years , which includes lt weld material reclaim machines , welding rod ovens , welding rod and welding material combination ovens , the weld material reclaimed and transportation machines on the operation machines , and so on . it is a high and new technology corporation , and also a combination of technique type and production management type that passed iso9001 : 2000 international system attestation of the quality managements , and it is one of the factories that have the most influencing and have the most market quota in producing the weld machine and its assistant production presently in our country . by right of the strong technique strength , the high diathesis employee troops , and the high spirit 无锡联通焊接机械有限公司位于风光秀丽的太湖之滨- - - - - - -无锡，公司多年来专业生产焊接系统埋弧焊上的各种系列的lt焊剂回收机，焊条烘箱、焊条焊剂组合烘箱、操作机上的焊剂回收输送一体机等等，是一家技术型和生产经营型相结合的高新技术企业；在同行业率先通过iso9001 ： 2000国际质量管理体系认证，是目前国内生产焊接机械辅机产品最具影响力及市场份额的工厂之一。
Because of the nonlinear , time - variability and uncertainty of the submerged - arc welding progress , the characteristic of accurate mathematic model being hard to establish , we can adopt the fuzzy control technology to design the welding dolly control system , and the couple closed - loop fuzzy control velocity system and fuzzy control algorithm for the speed of the welding dolly are researched based on the control system of submerged ? arc welding 同时长时间工作也容易使人产生疲劳,影响焊接质量。针对埋弧焊过程的非线性、时变性和不确定性,难以建立精确的数学模型等特点,采用模糊控制来设计焊接小车控制系统,同时研究了焊接小车双闭环模糊调速系统,并针对焊接小车速度的双闭环模糊控制算法进行讨论。
Arc welding technologies in japan have been advanced steadily since the time when an application of covered electrodes was first examined in the shipbuilding industry about 90 years ago . the history of the arc welding technology has always been the history of the pursuit of higher " efficiency and speed " of welding processes welding materials , originally started with covered electrodes ， have been developed into more efficient submerged arc welding materials and gas ? shielded arc welding materials with which automatic welding and robotic welding can easily be conducted . the gas ? shielded arc welding materials can be classified mainly into solid wires and flux ? cored wires ( fcws ) , and of these wires ， fcw has been increasing in uses year by year because of its excellent workability and efficiency . this article describes the recent trends in the development of fcws which now hold the major position in the welding materials . a special focus is put on the fcws for carbon steels 90年前,日本的造船业开始使用药皮焊条.自此,日本的弧焊技术取得了长足进步.弧焊技术的历史是焊接工艺"高速度、高效率"的历史.自药皮焊条开始焊接材料已发展成为更高效的埋弧焊焊材和气保焊焊材,并能更容易地结合自动化焊接和机器人焊接.气保焊焊材主要分为实芯焊丝和药芯焊丝,药芯焊丝的应用因其出色的实用性和效率而逐年增加.介绍了药芯焊丝作为主要焊材的发展趋势,尤其是在碳钢焊接上的应用
