In this paper,a theoretical analysis of the effect of residual stresses on the fatigue behavior of welded butt joints was developed by using linear elastic fracture mechanics(LEFM),superposition principle and finite element approaches.
利用线弹性断裂力学（ＬＥＦＭ）理论、迭加原理和有限元分析方法，就残余应力对对焊接头的疲劳性能的影响进行了理论分析。
The strength of tube joint is raised and the deformation ability of freezing tube is improved by the joint of an inner tube, which solves a problem for the coordinate deformation between freezing tube (regard as structure object and sealed chamber) and freezing wall.
通过冻结管整体抗弯试验 ,表明冻结管破裂失效的主要原因是接头的损坏 ;而内衬管对焊接头形式提高了接头强度和冻结管的变形能力 ,较好地解决了作为结构物和密封容器的冻结管与冻结壁的协调变形问题。
Common quality defects in butt-welding of steel bars and preventive measures;
钢筋对焊接头质量通病及防治措施
Analysis and Discussion of Butt Welding Quality\= on New Metallic Card Clothing;
新型金属针布接头对焊质量的分析与探讨
The upset formation process of rail (U71Mn) butt welding was test by thermal and mechanical simulation using Gleeble-2000 simulator.
采用Gleeble-2000热模拟试验机,对高速铁路轨道用U71Mn钢轨钢的对焊顶锻变形过程进行了热力模拟试验。
This paper introduces the influence of welding condition upon the quality of tube-web-tube joints welded by resistence butt welding, such as the optimization of parameters, adding in auxiliary electrodes, adding in an ideal electrical conductivity electrode.
通过焊接工艺在数优化、设置辅助电极及理想导电条件的多项试验，系统研究了间断鳍片管电阻对焊接头质量问题，指出其主要影响因素是未焊透缺陷。
PLC control system for butt welder of Cu-Al connecting tube for air-conditioning;
空调铜铝连接管对焊机的PLC控制系统
The executive mechanism of Cu-Al pipe butt welder,based on above,was designed,including its air system and mating clamper.
在此基础上,设计了铜铝管对焊机的执行机构,包括其气动系统和配套夹具。
This paper,based on analyzing the process of Cu-Al pipe butt welding, discussed the design of the executive system and control system for PLC controlled Cu-Al pipe butt welder.
在分析了铜铝管焊接工艺过程的基础上,重点论述了铜铝管对焊机执行系统和控制系统的设计。
Development of heat treatment automatic control system for welded drill pipe;
对焊钻杆热处理自动控制系统研制