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等离子弧焊过程控制系统的电磁兼容性研究
等离子弧焊 过程控制 单片机 电磁兼容
2010/8/10
通过分析基于MCS196KC单片机控制的等离子弧焊过程控制系统的工作原理和电磁兼容性能，结合等离子弧焊过程对控制系统产生的影响，从过程通道、空间干扰和电源稳定性三个方面分析了等离子弧焊过程控制系统的电磁兼容性问题，并提出了解决办法，提高了系统过程控制的稳定性。
逆变电焊机电磁兼容性设计的研究
电磁兼容性 焊机 微控制器 软硬件
2010/8/10
电磁兼容性是机电设备设计中必须考虑的问题，针对目前电焊机系统存在的电磁兼容性问题，系统分析了焊机系统可能存在的各种电磁干扰，并在软硬件设计过程中采用了相应的技术。在硬件设计中主要讨论微控制系统、电源及电路板；在软件设计中主要讨论了软件冗余技术、软件陷阱技术、数字滤波和“看门狗”技术等。实验证明，这些设计有效地解决了焊机控制系统的电磁兼容性问题，具有一定的实际应用价值。
弧焊设备谐波检测系统的研制及应用
弧焊电源 谐波 嵌入式PC 测试
2010/8/10
对弧焊电源功率因数、谐波等参数的测量方法进行了研究，采用加窗的FFT算法研制了一套基于嵌入式PC的弧焊电源检测系统，分别对带LDC滤波器的弧焊逆变电源和普通弧焊逆变电源进行谐波分析比较，实验表明该分析仪系统可靠，分析结果精确。
Al2O3/Ni–Ti/Kovar钎焊接头热循环试验
氧化铝 Kovar 活性钎焊
2009/11/16
对采用活性钎焊的Al2O3/Ni-Ti/Kovar(可伐)接头进行了考察，实验结果显示，接头经热循环后强度异常增加. 对此结果从材料的热膨胀特性、焊料微观结构、循环温度等方面进行了详细分析. 结果表明，本实验条件下热循环能显著降低焊接残余应力，导致接头强度提高.
OCr18Ni12Mo2Ti合金钝化膜的俄歇能谱分析
奥氏体 不锈钢 俄歇能谱 钝化膜
2009/11/11
借助俄歇能谱对ＯＣｒ１８Ｎｉ１２Ｍｏ２Ｔｉ合金在充氧的含氯离子硫酸溶液中所形成的钝化膜进行了分析，结果显示氧在膜的０．３－０．４ｍｍ深处富集并达到峰值，氯离子侵入钝化膜中但没有穿透膜。钝化膜中的Ｃｒ／Ｆｅ比值远比基体中的为高。
Statistical analysis of welding industry of South Korea
Statistical analysis Welding industry HSK classification
2010/1/19
Purpose: This paper represents the current status of welding industry of South Korea - how much the welding industry accounts for in monetary terms in the manufacturing industry of South Korea.
Desig...
The influence of welding parameters on weld characteristics in electric arc stud welding
stud welding parameters weld geometry penetration depth
2009/10/23
In this paper the influence of welding parameters on weld geometry during stud welding (Drawn Arc Welding process with ceramic ferrule) on steel plate and pipe is analyzed as a variation of weld penet...
Mathematical modeling for prediction and optimization of TIG welding pool geometry
TIG welding nonlinear mathematical models central composite design
2009/10/23
In this work, nonlinear and multi-objective mathematical models were developed to determine the process parameters corresponding to optimum weld pool geometry. The objectives of the developed mathemat...
Problems in repair-welding of duplex-treated tool steels
repair welding nitrided tool steel PVD coating die casting
2009/10/23
The present paper addresses problems in laser welding of die-cast tools used for aluminum pressure die-castings and plastic moulds. To extend life cycle of tools various surface improvements are used....
LASER REPAIR WELDING OF MOLDS WITH VARIOUS PULSE SHAPES
laser repair welding pulse-shaping
2009/10/23
Repair welding of cold-work tool steels with conventional methods is very difficult due to cracking during remelting
or cladding and is generally performed with preheating. As an alternative, repair ...
利用Al-Si-Mg钎料和自制工艺罩内置Mg粉方法，实现化学镀镍Al2O3陶瓷与5A05铝合金的真空钎焊连接，并分析保温时间及连接温度对接头界面结构和抗剪强度的影响。结果表明：连接温度570 ℃，保温时间15 min为最佳工艺参数，此时接头界面结构为Al2O3/Ni(Ⅰ区)/Al3Ni2(Ⅱ区)/Al3Ni+Mg2Si(Ⅲ区)/α(Al)+Mg2Si(Ⅳ区)/5A05，接头的抗剪强度为25 MPa...
高速GMAW驼峰焊道形成过程的数值分析
焊接 高速GMAW 驼峰焊道 数值分析
2009/10/15
基于高速气体金属电弧焊(GMAW)驼峰焊道形成过程的实验观测结果, 充分考虑熔池中后向液体流的动量和热焓, 在熔池表面变形方程中加入后向液体流的动能项, 并将熔滴热焓分布在整个熔池表面层, 建立了高速GMAW驼峰焊道形成过程的数值分析模型. 模拟了一定焊接条件下的驼峰焊道形成过程及其三维形状与尺寸, 与实测结果进行了对比, 证明本文模型能够较好地模拟高速GMAW过程, 可定量分析驼峰焊道形成过程....
搅拌头机械载荷在搅拌摩擦焊接中的作用的数值分析
搅拌摩擦焊 数值模拟 残余应力
2009/10/15
利用数值模拟技术分析搅拌头机械载荷在焊接过程中的作用, 通过对比只考虑热载荷, 考虑热载荷和搅拌头的下压力, 综合考虑热载荷、搅拌头下压力和工作扭矩三种条件下的应力、应变和变形, 结果发现, 搅拌头下压力使焊后残余应力值大幅下降; 搅拌头的工作扭矩是焊后残余应力、应变不对称分布的重要影响因素; 并且搅拌头机械载荷使得薄板焊后残余变形的模式发生了完全相反的变化, 由不考虑搅拌头载荷时的马鞍状变成了反...
Diffusion Welding Under Protective Gas Atmosphere and its Application
Diffusion welding argon gas
2009/10/14
In this study, di usion welding technique was applied to pure copper and aluminium in argon gas. An experiment set has been designed and series of experiment have been performed. In order to investiga...
The Effect of Welding Speed on the Microstructure and Penetration in Arc Welding
Gazi Universitesi Teknik E˘ gitim Fakultesi
2009/10/14
The effect of welding speed on the microstructure and penetration in MAG, SMAW and MMA welding
was investigated in a low carbon steel. Experimental results revealed that the penetration decreased whe...