焊的

An engineering procedure for estimating crack growth behavior and fatigue lives of semielliptical surface cracks at weld toe s in complex stress fields was proposed based on a database of stress intensity factors and the elementary modes method developed by author.

以作者建立的焊趾半椭圆表面裂纹应力强度因子数据库以及复杂应力场中焊趾半椭圆表面裂纹前缘应力强度因子分布计算的基本模式法为基础，给出了复杂应力场中焊趾表面裂纹在疲劳扩展过程中形态变化规律及寿命的工程分析方法；并用这个方法计算了一些典型焊接接头在一些典型的外加应力场和残余应力场中的裂纹形态发展曲线。

On base of analysis to simulation result, it was point out the main cause making dissimilar metal"s bonding so difficult was metal"s inharmonic plastic deformation. The distribution and changement of stress and strain on interface and in workpieces were analyzed.Making use of experiment and simulation result, main factors that influence welding property of cold pressure welding were discussed.

通过对模拟结果的分析，说明了异种金属冷压焊较同种金属冷压焊困难的原因主要是界面处两种材料的径向和轴向的不协调塑性变形；直观地显示了冷压焊过程中工件内部及界面处的应力应变分布及变化情况。

With the analysis of the radiation theory, energy transmission and the balance properties of the radiation spectrum of the arc plasma, the distribution characteristics of the arc spectrum along frequency, space, and time field was investigated, which provide theoretical foundation for the research on the spectrum information of Pulsed MIG welding.

熔化极气体保护焊电弧等离子体辐射光谱中含有丰富的反映熔滴过渡的信息，本文在对脉冲MIG焊电弧光谱信息深入考察的基础上，首次将其应用于脉冲MIG焊熔滴过渡过程的控制研究中，并真正实现了一脉一滴（1峰0基）的熔滴过渡过程，开创了利用电弧光谱信息控制焊接物理过程的先河。

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。

Based on the characteristics and the demands of synchronization, a single nero forecast controller was presented, which was designed to eliminate synchronization error of upset force in flash butt welding. A press feedback loop was designed to solve the problem that it is uneasy to assemble force sensor in flash butt welding.

针对于大截面钢坯闪光焊顶锻阶段的特点和同步要求，提出了一种基于单神经元的同步误差预测控制方案，用于消除闪光焊顶锻过程中的系统之间顶锻力的同步误差；方案中采用液压系统压力反馈的方法解决了闪光焊中不方便安装里传感器的问题。

The mechanical properties and microstructure of the joints joined by the new developed filler metal and TC18 filler metal were compared,the results showed that only the strength of the joint joined by TC18 filler metal was satisfied,while the comprehensive mechanical properties of the joint joined by the developed filler wire were ideal.

对采用研制的焊丝和采用TC18同质焊材钨极氩弧焊焊接TC18钛合金的接头力学性能及微观组织进行了对比研究，结果表明：采用同质焊材焊接TC18钛合金只能保证接头的强度指标，而采用研制的新型焊丝焊接TC18钛合金，可以保证接头具有优良的综合力学性能。

The invention relates to a method for preventing a top metal layer of packaging chips from fracturing under high temperature, which avoids the fracture of the top metal layer caused by the inter-diffusion of a gold ball, an aluminum welding pad and a top layer metal by introducing a lower metal layer to the joint between the top layer wire and the aluminum welding pad and driving a metal plug to the joint between the top metal layer and the lower metal layer and a metal plug to the joint between the lower metal layer and the aluminum welding pad.

一种防止封装芯片上的顶层金属层在高温下断裂的方法，通过在顶层金属线和铝焊垫之间连接处引入下层金属层，并在顶层金属层和下层金属层之间的连接处以及下层金属层和铝焊垫之间的连接处打金属插塞，避免了因金球、铝焊垫以及顶层金属相互扩散造成的顶层金属层断裂。

In addition, the authors also investigated the mechanism of pitting failure of spraying weld tappets, the anti-pitting properties of surface spraying weld overlying strata and the influence of spraying weld technique on the anti-pitting property of tappet.

文章还就喷焊挺杆的点蚀失效机理、挺杆表面喷焊覆层的抗点蚀性能和喷焊工艺对挺杆抗点蚀性能的影响等进行了比较系统而深入的分析和讨论，指出这种喷焊上艺可以应用于斯太尔挺杆的国产化批量生产。

The relationships between welding pool width, wire extension and welding parameters including welding current duty ratio, base current, peak current, welding speed and wire-feeding speed were studied. Through large numbers of welding experiments, aluminum alloy pulsed MIG welding dynamic process were identified by the curve fitting method, and the mathematical models between welding current duty ratio, base current, welding speed, wire-feeding speed and wire extension were obtained, succeeding the model between the above parameters and weld pool width.

介绍了铝合金MIG焊焊接电流占空比、基值电流、峰值电流、焊接速度、送丝速度对熔宽的影响规律，并在其基础上，通过平板堆焊试验研究了这些参数对焊接干伸长的影响规律；在铝合金机器人脉冲MIG焊平板堆焊过程各焊接参数与正面熔宽之间的传递函数的基础上，采用铝合金平板堆焊阶跃试验，利用曲线拟合法辨识了铝合金机器人脉冲MIG焊动态过程传递函数，建立了焊接电流占空比、基值电流、焊接速度、送丝速度与焊接干伸长之间的对象数学模型。

The independently designed and produced series ultrasonic aluminum wire press welder, series ultrasonic gold wire ball welding machine, series ultrasonic large wire press welding machine shows the outstanding talents and the meticulous pursuit of our engineers, and our professional standard and rich and rich experience in microelectronic welding technology, it also means the development milestone of domestic semiconductor component interior wire welding equipment.

深圳市创唯星自动化设备有限公司是一家专业从事半导体封装设备研发、制造和销售的高新技术企业。公司整合了伟天星精密机电、微迅自动化两公司的研发、制造、销售的菁英，成立了创唯星公司。我们自行研发、制造的系列超声波金丝球焊机、系列超声波铝丝压焊机、系列超声波粗铝丝压焊机、系列LED自动点胶机等设备，处於国内领先地位，加上我们的价值服务，得到了广大客户的肯定和大力推荐。

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％。