多层焊

基于PLC的管道多层焊跟踪控制系统研究

Research on pipeline multi-layer welding tracking control system with PLC

采用焊接热模拟再现了单道焊和多层焊HAZ的组织。

Weld thermal cycle simulation was used to reproduce the structure in the HAZ of single run and multi-layer welding .

研究表明，焊缝侧弯形貌分析是了解Mn－Si系多层焊焊缝变形能力的一种直观有效的途径。

The results show that this study provided is an evident effective way for understanding the deformation ability of Mn Si multi layer weld .

此外，研制了一种CCD实时跟踪系统，使机器人可对全位置多层焊进行重复跟踪。

At the same time , a CCD real-time tracing system is developed for the robot to repeatedly trace the all-position and multi-layer seams .

基于ANSYS软件，利用生死单元技术与施加内部体热源的方法实现了多层焊焊缝填充过程的模拟，完成了对接接头多层焊的数值分析。

The process of pass filling dynamical multi-layer welding is realized by the method of loading-on welding heat source and using " Element Birth and Death " in ANSYS .

Mn-Si系多层焊焊缝侧弯形貌的研究

Study on Pattern of Side Bend of Mn Si Multi layer Weld

管道多层焊视觉图像跟踪系统采用CCD获取焊缝区域图像，通过计算机处理控制行走机构，设计的跟踪算法及相应的PLC软件程序设计实现了厚板多层焊的焊缝自动跟踪。

The pipeline multilayer welding tracking control system can acquire the seam graph with CCD , and control the traveller by computer . The track algorithm and PLC program design realize the seam auto tracking of thick-plate of multilayer welding .

本文通过焊接接头侧弯试验、光学显微镜和扫描电镜分析，对Mn－Si系多层焊焊缝侧弯形貌进行了研究，探讨了侧弯形貌与焊接热循环、焊接线能量及显微组织之间的关系。

The pattern of side bend of Mn Si multi layer weld is investigated with side bend test of weld joint , optical microscope and scanning electron microscope analysis . The relationship between weld thermal cycle , heat input and microstructure with pattern of side bend is also discussed .

但是TIG焊由于其电极的载流能力有限，电弧功率受到限制，熔敷速度低，尤其是中等厚度的焊接结构，需要开坡口和多层焊。

However , the arc power of TIG is limited because of current-carrying capacity of its welding electrodes is finitude , and the deposition efficiency is low . Particularly welding the middle thickness of the welded structure , the need to open and multi-layer welding groove .

根据新型高强钢经受不同热循环后的组织变化规律，建立了新型高强钢多层焊焊接热影响区（HAZ）的数值计算模型。

In this paper , the authors have established a numerical calculation model of the HAZ of multipass welds of a new type high strength steel , according to the various structure of the new type high strength steel after varied heat circle .

采用全位置脉冲TIG焊技术对小口径钢管环缝进行焊接，焊接采用TIG焊打底+TIG填丝的多层焊工艺，分析了打底焊及每层填丝焊接完成后的打底层焊缝组织。

The small diameter steel pipe was welded by the technique of the full circumference pulse TIG welding , using the procedure of the backing TIG welding and filler rod TIG welding . The paper analyzed the weld seam structures of backing welding and each filler rod welding .

通过H10Mn2焊丝不同焊接线能量多层焊条件下焊缝组织的热模拟，说明其组织转变情况及其对强韧性的影响。

By thermos simulation test with different welding energy on the welding microstructure under various seams , explained its condition of microstructure transition effect on strength and toughness .

铜和铌对多层焊焊缝金属显微组织和硬度的影响

Effect of Cu and Nb on Microstructure and Mechanical Property of Multi-layer Weld Metal

无导轨多层焊自动跟踪微机控制系统研究

Research on Micro-computer Controlled Welding Seam Tracking System without Rail for Multi-layer Welding Process

厚板柱坡口多层焊瞬时温度场的有限元计算

The Calculation of Transient Temperature Field in Heavy Welded Shapes by Finite Element Method

碳钢多层焊焊缝低温冲击出现低值的直接原因

The immediate cause presenting low impact values in cold-state temperature for multilayer weld of carbon steel

在多层焊的过程中，采用对称施焊的方法得到的焊接残余拉应力峰值是最小的。

In the multilayer welding process , the method of symmetry welding gets the minimum residual tensile stress .

多层焊形式下的残余应力与加热宽度的关系表现为后一种型式。

The relation between the residual stress and heated band width in multi pass welding behaves in the latter type .

多层焊焊接应力分布对管子局部热处理应力释放准则的影响

Effect of Residual Stress Distribution in Multi-Pass Welding on Stress Relief Criterion in Local Post Weld Heat Treatment of Pipe

结合二维小波变换方法与数学形态学方法对多层焊填充层焊道图像进行处理，实现对焊道边缘及坡口边缘的提取。

Wavelet transform and mathematic morphology algorithms are used to process multi-pass seam image to get weld pass and groove 's edges .

对核电凝汽器制造中的大拼板多层焊后的角变形进行了计算机预测。

Angle distortion modeling and prediction with computer for heavy plate multi-pass welding are carried out during condenser fabrication for nuclear power station .

采用多层焊和多道搭接工艺可获得大厚度、大面积堆焊层。

By means of multi layer and multi pass lap surfacing , the surfacing layer with big thickness and area can be acquired .

但是板单元无法实现热源的移动，而壳单元无法实现多层焊各层之间的关系。

But the plate element model can not realize the movement of heat source and the shell element model can not achieve the relation between layers of multilayer welding .

气电立焊属于窄间隙焊，与其它窄间隙焊的主要区别是焊缝一次成型，而不是多道多层焊。

Electrogas welding for vertical is a narrow-gap welding , which is mainly different from other narrow-gap welding , the mainly difference is that a shape rather than the multi-channel multi-pass welding .

大堆的雪吹积在屋旁。采用多层焊和多道搭接工艺可获得大厚度、大面积堆焊层。

The snow was drifting in great piles against the house . By means of multi layer and multi pass lap surfacing , the surfacing layer with big thickness and area can be acquired .

激光热源作用模式对焊缝侧壁熔合的影响、多层焊过程焊缝冷却速度及应力应变情况都是这一工艺的应用基础研究，很难采用试验方法直接获得。

It is difficult to obtain the impact of mode of the laser heat source to sidewall fusion of the weld , weld cooling rate and the stress-strain conditions in multi-layer welding process with experimental method .

利用多层焊热弹塑性有限元程序，对文献中所提出的对接焊结构焊缝区的残余应力估算公式进行数值验证。

With multi-layer welding thermal elasto-plastic definite element method , the numerical demonstration is carried on to prove the engineering estimation formula of welding residual stress in the weld zone of butt welding structure provided in literatures .

设计了适合于厚板双光束填丝多层焊的窄间隙坡口形式，保证了厚板激光填丝焊的单道多层焊与低变形工艺要求，并一定程度上提高了丝与光对中性。

Design narrow gap groove suitable for dual beam laser welding thick plates with filler wire , guaranteed technological requirements of single pass multilayer welding and low deformation , increased neutral of wire and light to some extent .

利用轨道式的焊接辅助小车，采用CO2多层多道焊工艺，通过对坡口形式、喷嘴、导电嘴的改进，确保了焊缝质量，减少熔敷金属量，降低了生产成本。

It improves welding quality and lower production cost by using welding tractor , adopting multi-cover and multi-path CO2 welding , improving slope mode and nozzle , etc.

研究了经典PID控制和模糊控制以及两者相结合的控制方法，开发了一套适用于V型坡口和多层多道焊焊缝跟踪的控制软件。

Traditional PID control strategy , Fuzzy control strategy and Fuzzy-PID control strategy are offered in the article . The software for tracking of V-groove and Multi-Layer Multi-Road was also provided in the article .