焊的

In order to overcome the defect of induction, the furnace braze welding is used in making brazed monolayer grindingplate.

针对高频感应钎焊的缺点，进行炉中钎焊制造单层钎焊砂盘的研究。

The content of this course mainly include the feature, equipment, principle and application of high efficient welding method, for example, activating flux assisted TIG welding, narrow gap TIG welding, hot wire TIG welding, oscillating arc TIG welding, plasma TIG welding tandem MIG welding, hybrid arc welding, surface tension transfer MIG welding, oscillating arc MIG welding, mixed-gas MIG welding, two wire or more SAW welding, friction stir welding and laser-MIG hybrid welding, etc.

主要内容涉及到助焊剂TIG焊技术、窄间隙TIG焊技术、热丝TIG焊技术、摆动电弧TIG焊技术、等离子弧焊技术的基本原理、设备、特点和应用。双丝焊MIG方法、复合电弧技术、表面张力过渡、摆动电弧MIG、交流MIG焊、混合气体MIG焊的原理、特点、设备和应用。双丝以及多丝埋弧焊技术、窄间隙埋弧焊技术的原理、特点和应用。搅拌摩擦焊以及激光电弧复合焊接的原理、特点、设备、应用范围。

The welding of end ring of alternating current machine and the conducting bar is the key technology for manufacturing of asynchronous traction motor with high power. China South Locomotive and Rolling Stock Industry Corporation had taken this significative study as a key project for the manufacturing of alternating current machine. According to the welding of end ring of alternating current machine, the welding of copper and copper alloy is described in this paper. Results obtained in this study are as follows. 1.By the comparison of oxyacetylene gas brazing, induction brazing and resistance brazing, it was found that high-quality welding joint could be obtained by induction brazing, which also had the highest efficiency.

交流电机端环与导条的焊接是大功率异步牵引电动机制造的一项关键技术，开展其焊接工艺研究具有重要的意义，中国南车电机公司将此课题作为解决交流电机制造的一个重点项目，本文结合交流电机转子端环焊接的课题，对铜及其合金的焊接进行了研究，主要研究结论如下： 1、通过氧乙炔火焰钎焊、感应钎焊、电阻钎焊等焊接方法的对比试验发现感应钎焊可获得优质的焊接接头，且感应钎焊的焊接效率也是最高的。

Shanghai Institute of Mechanical ＆ Electrical Engineering,Shanghai 200040,ChinaAbstract: With the development of pulse arc welding,especially to foretime some material with high heat tenderness difficult to weldthe situation difficult to weld(such as full position welding,narrow gap welding,and the pipe,thin workpiece need singlefaced welding to make doublefaced moulding).

脉冲弧焊工艺的发展，特别是对一些难焊的、热敏感性高的材料和难于施焊的场合(如全位置焊、窄间隙焊以及要求单面焊双面成形的管件、薄件)，脉冲焊均显出独特的优越性。

GMA welding becomes more and more important with the application and development of semi-automatic and automatic welding, it appro...

随着半自动焊与自动焊的推广应用，GMA焊在各种焊接方法中占有越来越重要的地位，我国目前已达到25%左右，而先进的工业化国家已高达50～80%。

Yun-strip method, the circle-shaped bath temperature higher than the crescent-shaped article transport transport of temperature, the temperature was higher than the crescent-shaped article transport serrated Article transported bath temperature, in the 12mm flat bottom welded seal, using serrated transport of , and with the magnitude and the swinging groove on both sides of the pause, effective control of the bath temperature, so that pore size of the melt is essentially consistent with the roots do not form a welding groove tumor and decrease the chances of burn-through, no penetration has The improvement of the peace panels of the single-sided welding butt welding flat-sided shape is no longer difficult.

运条方法，圆圈形运条熔池温度高于月牙形运条温度，月牙形运条温度又高于锯齿形运条的熔池温度，在12mm平焊封底层，采用锯齿形运条，并且用摆动的幅度和在坡口两侧的停顿，有效的控制了熔池温度，使熔孔大小基本一致，坡口根部未形成焊瘤和烧穿的机率有所下降，未焊透有所改善，使乎板对接平焊的单面焊接双面成形不再是难点。

CO2 gas shielded arc welding is there in the early 50s as a fusion welding method, have been quick to promote the use, has become an important method of fusion welding, steel structure is applied in up to 45%, widely used in vehicle manufacture , shipbuilding and various mechanical structures, in the company practice, I for CO2 gas shielded welding skills and welding operations carried out several shortcomings of research, I and some technical discussion, with some of my experiences.

CO2气体保护焊是在50年代初出现的一种熔化焊方法，现已被迅速的推广使用，已经成为一种重要的熔化焊方法，现在在钢结构中应用达45%，广泛运用于车辆制造，船舶制造和各种机械结构，在公司实习中，我对于CO2气体保护焊的操作技巧和焊缝缺点进行多次研究，我和一些技术人员的讨论中，有了一些自己的体会。

The research results found that due to the energy characteristic of the hybrid welding, the lap welding joint of magnesium alloy appeared "pin shapes " and the microstructure characteristics can be divided into two parts: The top of bead was the zone acted by laser and TIG together, while the bottom of bead was acted by laser alone.

研究发现：复合热源搭接的能量特点导致接头宏观呈&图钉&形状，复合热源搭接焊的热循环特点导致了接头微观组织的特殊性：接头上部呈现激光焊与TIG焊共同作用下的组织特征；接头下部呈现明显的激光焊组织特征。

The tack welding and interior/outerior welding can improve welding speed and quality, and control welding quality effectively

采用先预焊后内外焊的工艺，可在最佳位置实现焊接，焊接速度快、效率高，不易出现错边、焊偏和未焊透等缺陷，有效控制焊接质量

In addition, the analyses of weld surface ripple and microstructure with three current waveforms have indicated that the high frequency wave group modulated by low frequency GTA welding has the advantage of both the low frequency in which the heat input of the weld pool is easily controlled and high frequency GTA welding in which the arc is energy—concentrated and stiff.

另外，通过对高频脉冲焊、低频脉冲焊、低频调制高频方波群焊不锈钢焊缝表面形貌分析表明，低频调制高频方波群焊综合了低、高频GTA焊的特点。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐