焊接的

The process of establishing neural network is as follows: input parameters of network are selected from thickness, preheat temperature, heat input, welding position and sampling point, output parameter of network is impact ductility CVN, two-layer neuronic network configuration, S-type active function and back-propagation learning algorithm are selected.

文章摘要：采用VC语言实现了X70管线钢环焊接头冲击韧性与环焊工艺之间神经网络结构的建立过程，将壁厚、预热温度、线能量、焊接位置、取样位置作为结构的输入，将环焊接头的CVN值作为结构的输出，选择了具有2层神经元的神经网络结构和S型激活函数及BP学习算法。

Through the exact control of welding current, the seaming figure and crystal organization can be improved, and the splash can be reduced, therefore, the mechanical property of seaming is enhanced.

通过对焊接电流波形的精细控制，可以减少焊接过程的飞溅、改善焊缝的形状和结晶的组织形态，进而使焊缝的机械性能得以大幅度的提高。

This research used MZ1-1000 automatic submerged arc welder and 2 mm-diameter H08A electrode wire to simulate welding with trailing peening and to establish three dimensional finite element models.

随焊锤击的时机取决于温度场变化，针对此问题，以MZ1-1000型自动埋弧焊机、Φ2 mm的H08A焊丝为例，对平板堆焊进行了模拟，建立了三维有限元计算模型，并编制了实现热源移动的循环子程序；运用表面效应单元，解决了两种不同载荷同时加载的问题，实现了焊接温度场的三维动态模拟，得到了不同时刻焊件的焊接温度场分布。

This paper gives a discussion on relation between shape,size and quality of welding seam ,and introduces the effect on liquidity of metal in molten bath and shape of molten bath from welding stress and the effect on size of welding seam from welding parameter and its technological factors.

论述了焊缝的形状尺寸与焊缝质量的关系，介绍了焊接中力对熔池金属的流动及熔池形状的影响、焊接参数和工艺因素对焊缝尺寸的影响，对焊缝缺陷产生的原因进行了分析并提出了预防措施。

6 3 Bracket: Steel plate thickness: 0.6 ～ 0.9 Structure Structure 1: evaporator for single temperature control system (Single-capillary evaporator) Structure 2: evaporator for double temperature control system (Double-capillary evaporator) Structure 3: evaporator for three way temperature control system (Three-capillary evaporator) Key process Tube bending, Welding, Mono shelf assemble, Assembly welding, Leakage test, Cleaning, Coating, Inspection, Packing Technical standards Wire pitch:≥ 5 ㎜, can produce according to the drawing or sample supplied by clients, also can help the clients design and produce different evaporators.

1.4 ？ 1.6 3 ）支架：钢板厚度： 0.6 0.9结构结构1 ：蒸发器的单一温度控制系统结构2 ：双蒸发器温度控制系统结构3 ：蒸发器的方式为三个温度控制系统关键过程弯管，焊接，组装单棚，大会焊接，泄漏试验，清洗，涂料，检验，包装的技术标准线间距：≥ 5 ㎜，能产生根据图纸或样品提供的客户，还可以帮助客户设计和生产不同的蒸发器。

Results show that the servic.e life of TiB2/Cu electrode with a TiB2 content of 1.5 wt% reaches 7700 weld spots, which is 4 to 8 times that of Cr-Zr-Cu electrode materials when coated steel sheets are spot welded; the service life of the composite electrode reaches 30000 weld spots, 2 to 3 times that of Cr-Zr-Cu electrode materials when conventional carbon steel sheets are spot welded.

对 T i B2增强铜基复合材料作点焊电极点焊镀层钢板时的失效进行了分析，结果表明：含TiB2为1.5wt％的铜基复合材料作电极，焊接镀锌钢板的使用寿命约为7700点，是普通电极材料Cr－Zr－Cu的4～8倍，焊接普通钢板的使用寿命约为30000点，是普通电极材料Cr－Zr－Cu的2～3倍。

This article has mainly studied one kind improved two person two-sided synchronized GTAW craft for the austenite stainless steel. This craft makes the improvement in the original two person two-sided synchronized GTAW craft foundation which one time welding two-sides formings. A series of welding engineer testing on 8 mm SUS304 were carried on. The new craft could guarantee the welding quality in contrast with the original two person two-sided synchronized GTAW.

主要研究了一种改进了的奥氏体不锈钢的双人双面同步钨极氩弧焊工艺，此工艺是在原有的双人双面同步钨极氩弧焊工艺的基础上进行的改进，即将原有的一次焊双面成形改为两次焊成型，并在厚度为8 mm SUS304上进行了一系列焊接工艺试验，验证了这项新工艺与常规双人TIG双面焊相比，能保证焊接质量。

Meanwhile, the microstructures and mechanical properties of friction welded drill pipes have been compared with those of hot-upsetting drill pipes.

试验结果表明，采用摩擦焊接及焊后调质热处理工艺制造的DZ60地质钻杆焊接接头的常规力学性能指标均高于地矿部DZ60地质钻杆管材的技术标准规定的数值，并优于采用现行热墩粗工艺制造的钻杆管材的力学性能数值。

There is no essential difference between the two, as the pool of metal around the hole surrounded by molten metal gravity and surface tension have to make holes to bridge the trend, while the metal vapor is generated by a continuous attempt to maintain the existence of holes.

从机理上看，这两种焊接方法的前提都是焊接时存在小孔，两者没有本质的区别，小孔周围为熔池金属所包围，熔化金属的重力及表面张力有使小孔弥合的趋势，而连续产生的金属蒸气则力图维持小孔的存在。

By analyzing and comparing the above test results, the special demands for welding current and time and pressure in the spot welding of zinc-coated steels were put forward.

为了在需点焊加工的产品上推广使用镀锌钢板，并保证其焊接质量，本文对普通冷轧钢板、电镀锌钢板和两种不同锌层厚度的热镀锌钢板进行了一系列点焊工艺及力学性能试验，并通过对试验结果的数据处理和理论分析，找出了几种材料点焊工艺性能上的差异，得出了一套合适的点焊焊接规范范围。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。