查询词典 welded joint

The static model of torsion joint is based on that of bending joint. The effects of structure parameters inside air pressure, initial angle, rube average radius, rube shell thickness on the turning angle are analyzed and the following conclusions are drawn: the relationship between the angle of torsion joint and the inside air pressure is basically linear, the angle of torsion joint increases with the initial angle and rube average radius, the angle of torsion joint decreases while the rube shell thickness increases. The kinetic equation is built for torsion joint. Simulating experiment implies that the time of inflating and deflating process is extremely shorter than that of kinetic process. So the pneumatic process can be ignored in actual system design and control. The factors that affect the dynamic features of torsion joint, such as shell thickness of rubber tube, average radius, initial angle, connector's outlet area, moment of inertia and viscous damping coefficient, are analyzed and the following conclusions are drawn: the change of rube shell thickness has no effects on the dynamic process of FPA inside air pressure while greatly affects the turning angle of torsion joint; when the rube shell thickness is small, the torsion joint has a bigger turning angle, no overshoot and long risetime, when the shell thickness is big, the turning angle of torsion joint is small, but has high response speed, overshoot and low shock; when the rube average radius increases, the turning angle of torsion joint increases and the overshoot increases too; when the initial angle of torsion joint is big, the turning joint is big, the overshoot is small and shock is low, but the risetime is big; the connector's outlet area affects the dynamic process of FPA inside air pressure greatly, but has no effects on the dynamic process of turning angle; moment of inertia and viscous damping coefficient have no effects on the dynamic process of FPA inside air pressure, but affect the dynamic process of turning angle greatly.

在弯曲关节模型推导的基础上，建立扭转关节的静态模型，并分析了扭转关节内腔压力，初始转角，橡胶管平均半径，橡胶管壁厚等参数对关节转角的影响，得出扭转关节的转动角度与充入FPA内腔的压缩气体压力之间基本呈线性关系，扭转关节的转角随初始角度和橡胶管平均半径的增大而增大，扭转关节的转角随橡胶管壁厚的增大而减小的结论；建立了扭转关节的动力学方程，仿真实验表明FPA的充放气过程与扭转关节的动力学过程相比时间极短，在实际系统设计和控制过程中可以忽略不计；分析讨论橡胶管壁厚，平均半径，初始角度，气体节流口面积，转动惯量，粘性阻尼系数等因素对扭转关节动态特性的影响，得出橡胶管初始壁厚的变化对扭转关节FPA内腔压力的动态响应几乎没有影响而对关节转角的响应曲线影响比较明显，壁厚较小时，关节可以得到较大的转角，并且转角的响应曲线没有超调，但上升时间长，壁厚较大时，关节转角变小，响应加快，但是有超调和轻微振荡现象，橡胶管平均半径越大，得到的关节转角越大，但是转角响应的超调量也随之增大，FPA的初始角度越大，关节的转角越大，并且超调量减小，振荡减弱，但是上升时间增大，管接头出口面积的大小对关节FPA内腔压力的建立过程影响较大，但对关节转角的动态响应几乎没有影响，转动惯量和粘性阻尼系数对FPA内腔压力的动态过程几乎没有影响而对扭转关节转角有较大影响等结论。

Thirdly, with the modified Gurson model of the MARC finite element method soft, the damage behave of the welded joint was simulated. It was found that in the undermatched welded joint, the damage mainly happened in the soft weld line and with the decrease of the weld line抯 width, the damage抯 development was faster. As for the overmatched welded joint, the results showed that the damage mainly happened in the soft base metal and with the increase of the weld line抯 width, the damage抯 development was faster. While the width of the weld line was narrower than three millimeters, the high strength weld line could improve the anti-damage capability of the overmatched welded joint.

通过计算发现在低匹配的焊接接头中，损伤主要发生在低强度的焊缝中，并且焊缝宽度越小，焊接接头的损伤就越严重；而在高匹配的焊接接头中，损伤主要发生在紧临焊缝的强度较低的母材上，随高强度焊缝宽度的增加，焊接接头的损伤发展程度加剧，当焊缝宽度小于3mm时，高强度焊缝的加入对焊接接头能起一个强化的作用，提高了焊接接头的抗损伤能力。

Welded pipe unit: The stainless steel welded pipe unit, the cold bending formation series welded pipe unit, the high frequency welded pipe unit, the pot galvanize unit, cut the butt welding machine, the spiral welded pipe unit and the heavy-caliber straight seam bury the arc-welded pipe unit and so on the complete set of equipment and so on;..

焊管机组：不锈钢焊管机组、冷弯成型系列焊管机组、高频焊管机组、热镀锌机组、剪切对焊机、螺旋焊管机组及大口径直缝埋弧焊管机组等成套设备等；。。

This paper studies the effect of consequent post heat treatment on the mechanical property and shape memory ratio of the welded TiNi joints in TiNi shape memory alloy precise pulse resistance butt welding,analyzes the joint structures and fractographies affecting mechanical property and shape memory ratio of welded joint by using strength testing, SEM and TEM, gets the optimum welding parameters obtaining good shape recovery ratio welded joint, and has discovered the inherent reason for proper consequent post heat treatment to promote the joint shape recovery ratio from microcosmic point.

摘 要：采用拉伸测试、SEM、TEM和定点成分能谱分析等手段研究了随机后热处理对TiNi形状记忆合金精密脉冲电阻对焊焊接接头力学性能、形状恢复率的影响，并对影响接头力学性能和形状恢复率的接头组织和形貌进行了研究，得出了获得具有较高形状恢复率接头的焊接参数，从微观角度揭示了随机后热处理提高接头形状恢复率的内在原因，为TiNi形状记忆合金的开发和应用提供了基础，具有重大的理论和实际应用价值。

Hebei Wanda Stubbs silk Net Products Co., Ltd. located in China "township of wire mesh"- Anping County, was founded in 1999, covers an area of 3 million square meters, the main products are galvanized welded wire mesh, stainless steel welding Net, PVC welded wire mesh IMPREGNATION, standard welded wire mesh, heavy-duty welded wire mesh, PVC coated nets, welded wire mesh, stainless steel wire mesh, geothermal Net, Micronesia stria Net, reverse Micronesia stria Net, window screening, fiberglass window screening, grid cloth, all kinds of window screening, such as more than a dozen varieties, thousands of specifications.

河北万达拔丝织网制品有限公司位于中国&丝网之乡&－－安平县，始建于一九九九年，占地面积3万余平方米，主要产品有镀锌电焊网、不锈钢电焊网、PVC浸塑电焊网、标准电焊网、重型电焊网、PVC涂塑网、电焊网片、不锈钢丝网、地热网、密纹网、反向密纹网、窗纱、玻璃纤维窗纱、网格布、各种窗纱等十几个品种，上千个规格。

The research results indicate that the interface between weld and l2Crl MoV steel is the weakest part of welded joint. However ,the interfacial failure tendency of low match welded joint is less than those of medium and high match welded joint.

试验结果表明，焊前预热250℃，焊后回火750℃×1h，加速模拟运行500h后，高匹配和中匹配接头的力学性能劣化明显，界面蠕变损伤及失效倾向较大；而低匹配接头的力学性能优于高匹配和中匹配接头，界面蠕变损伤较轻，失效倾向较小。

This topic is aims at some tall and slender pipeline welded joint to carry on the welded joint flaw examination, manages the Daoist priest 5 meters, the welded joint for the straight line seam.

本课题是针对某细长管道焊缝进行焊缝缺陷检测的，管道长5米，焊缝为直线缝。

This topic is aims at some tall and slender pipeline welded joint to carry on the welded joint flaw examination, manages the Daoist priest 5 meters, the welded joint for the straight line seam.

论文编号： TX212 包括开题报告，任务书，外文翻译，PPT，论文字数：24902，页数：53本课题是针对某细长管道焊缝进行焊缝缺陷检测的，管道长5米，焊缝为直线缝。

This topic is aims at some tall and slender pipeline welded joint to carry on the welded joint flaw examination, manages the Daoist priest 5 meters, the welded joint for the straight line seam.

以下为资料的部分内容，如需要全部资料请点击获取全文论文编号： TX212 包括开题报告，任务书，外文翻译，PPT，论文字数：24902，页数：53

This topic is aims at some tall and slender pipeline welded joint to carry on the welded joint flaw examination, manages the Daoist priest 5 meters, the welded joint for the straight line seam.

分类： 计算机，通信，信息科学论文编号： TX212 包括开题报告，任务书，外文翻译，PPT，论文字数：24902，页数：53本课题是针对某细长管道焊缝进行焊缝缺陷检测的，管道长5米，焊缝为直线缝。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。