搜索结果: 76-90 共查到“知识库 焊接工艺与设备”相关记录1563条 . 查询时间(4.203 秒)
Microstructure and properties of FSW joints of 2017A/6013 aluminium alloys sheets
Friction Stir Welding Aluminium alloy 2017A Aluminium alloy 6013
2009/12/2
Purpose: The aim of the studies was to analyse the structure and mechanical properties of FSW joints. Experiment were perform in order to study possibilities to join different aluminium alloys 2017A a...
Effect of welding current on metal transfer in GMAW
investigations are mathematic descriptions of droplet flight trajectory and droplet velocity.
2009/12/2
Purpose: The paper presents findings related to the influence of welding current on metal transfer in GMAW. The main goal was to understand how droplet diameter, droplet velocity and droplet transfer ...
Control of welding process for BV-AH 32 steel
Welding quality Mathematical model Sensitivity analysis
2009/12/2
Purpose: The GMA welding process involves large number of interdependent variables, which may affect product quality, productivity and cost effectiveness. With the combination of sensors and mathemati...
Predicting Lap-Joint bead geometry in GMA welding process
Bead geometry ANOVA analysis Regression analysis
2009/12/2
Purpose: The prediction of the optimal bead geometry is an important aspect in robotic welding process. Therefore, the mathematical models that predict and control the bead geometry require to be deve...
Weldability during the laser lap welding of Al 5052 sheets
Welding Laser welding Aluminium alloy Lap welding
2009/12/2
Purpose: The paper presents the effect of the laser welding parameters of the laser focal position, the welding
speed and the laser output power on the weldability of Al the 5052 alloy during laser l...
绿色焊接设备生产初探
绿色 晶闸管 IGBT模块
2009/12/1
以“系统工程”的观点,对焊接生产系统进行了较为详细的分析,对采用电力半导体元件作为功率控制器件,产生电磁干扰的原因作了简要分析,结合国家标准对电磁兼容性EMC要求,探求绿色焊接设备生产的途径。
IGBT逆变焊机电磁骚扰的抑制
电焊机 电磁兼容 EMI抑制 IGBT逆变
2009/12/1
从分析IGBT逆变焊机电磁骚扰的来源及危害入手,结合GB 15579.10-2008《弧焊设备 第10部分:电磁兼容性EMC要求》标准,介绍了采用金属外壳的IGBT逆变焊机要通过EMC测试,应采取哪些措施来减小谐波电流、电源端子骚扰电压,并提出了具体可行的解决方案。
弧焊设备网侧电流谐波和传导发射的抑制技术
弧焊设备 电流谐波 传导发射
2009/12/1
分析了弧焊设备的输入电流谐波和传导电磁发射的产生原因,介绍了GB15579.10中关于谐波和传导电磁发射的标准限值,并且阐述了输入电流谐波和传导发射的抑制方法。
电磁兼容性(EMC)要求在实施过程中的困难及对策
电磁兼容性标准 建议 EMC分析
2009/12/1
《弧焊设备 第10部分:电磁兼容性EMC要求》国家标准即将实施。通过样机测试,反映出测试设备和测试环境的不足,建议加强EMC普及和在电焊机认证体系中建立国家级EMC实验室,并从技术上分析了送检焊机EMC不达标的原因及对策。
针对逆变焊接电源电路的特点,通过解析的方法分别给出稳态负载情况下单相、三相和脉动负载的输入电流的谐波分析结果,并得出不同情况下谐波的分布特点:稳定负载情况下,单相输入电流中包含2n+1次特征谐波;三相输入电流中包含6n±1次特征谐波;脉冲负载情况下,逆变电源的输入电流中除了含有特征次谐波之外,还出现了偶次谐波和直流分量,对电网污染更为严重。通过电路仿真和实验检测方法验证了分析的结果,并对输入电流的...
焊接作业环境电磁曝露的研究与进展
电磁场 曝露 焊接过程
2009/12/1
关于焊接电磁场环境对操作人员产生影响的研究一直在不断发展,有关的概念、检测和分析方法也越来越明确,这有利于限制焊接电磁环境曝露并对已知的不利影响进行防护。对焊接电磁场的属性、曝露容限及其评价程序作了介绍,提供了一个对焊接电磁场影响的最新认识。
弧焊设备的抗扰性研究
弧焊设备 电磁干扰 电磁抗扰度
2009/12/1
弧焊电源通常在恶劣的电磁环境下工作,而且本身就是一个强骚扰源,所以弧焊设备的抗扰性问题应引起重视,GB 15579.10-2008的制定和强制执行对弧焊电源抗扰性能提出了统一的实验标准和评判准则,包括静电放电抗扰度、射频电磁场辐射抗扰度、电快速瞬变脉冲群抗扰度、浪涌冲击抗扰度、射频场感应的传导骚扰抗扰度和电压暂降抗扰度六项实验。解决弧焊设备抗扰性问题的最好办法是在设计阶段做好弧焊设备的电磁兼容设计...
GB 15579.10标准规定的弧焊设备电磁兼容性测试内容
标准规定 弧焊设备 电磁兼容性 测试内容
2009/12/1
解读了GB 15579.10-2008标准规定的弧焊设备电磁兼容性要求,介绍了电磁发射和抗扰性两个方面的测试内容、试验条件、试验布置、试验方法和限值规定。
Purpose: of this paper is to analyze the results of tests on the mechanical properties and microstructural changes
in Friction Stir Welds in the aluminium alloy 6082-T6 in function of varying process...
Welding of girders to insert plates of composite steel-concrete structure of tower in Kuwait
Welding MMA insert plate Composite reinforces concrete
2009/12/1
Purpose: A study of influence of preheating and MMA welding technique of tee-joints of plate girders to insert
plates of a composite steel-concrete structure of the telecommunication tower, on the pr...