弯管

PLC在弯管机控制中的应用

The Application of PLC in the Control of Return Bend Machine

大口径弯管三层PE防腐新技术比较分析防酸性气体腐蚀面层

Comparison & Analysis on Three-layer PE Anticorrosion Technology for Large Diameter Bend

受内压P作用的纤维正交缠绕玻璃钢弯管结构设计和强度计算

Constructional Design and Strength Calculation of Orthogonal Filament & winding GRP Elbow under Internal Pressure

异径直角弯管展开CAD的数学模型

Mathematical model for CAD of right - angle deformed elbow development

微机控制缠绕90°弯管的CAD

CAD of a 90 deg Elbow Pipe Using Computer Controlled Winding

复合材料弯管纤维缠绕路径和机器路径的CAD

CAD for the Fiber Path and Machine Path of Composite Elbows

双U双π节能灯玻璃弯管机

Glass-pipe Bender for Double U and Double π Energy-saving Lamp

U形管连续弯管工装及弯制工艺

Bender and Bending Technique on Shaped Continually U - Tubes

用AutoCAD软件对弯管芯棒进行快速图解设计

The Fast Drawing of Mandril in Bending Tube by Using AutoCAD

结果表明，在同一气体流速下，不同R/D的弯管的Δp变化显著；

The results show that , at the same gas velocity , the Δ p of bends with different R / D varies significantly ;

PLC与HMI在自动弯管机中的应用

The Application of PLC and HMI in the Automatic Pipe Bender

弯管外拱壁内表面周向裂纹的J估算方法的研究

Study on J-Estimation Schemes for Internal Circumferential Surface Cracks in Pipe Elbows

含裂纹弯管的J估算方法的研究

Research on the J Estimation Method for Surface Cracked Elbows

FRP钢塑复合衬里弯管铸模研究

Study on liner molding of STEEL-FRP composite elbow

ANSYS二次开发技术在弯管缺陷超声导波检测数值模拟中的应用

Application of Second Development based on ANSYS Software on Simulation of Detection Defect in Curved Pipes Using Ultrasonic Guided Waves

本文介绍了PLC在大口径中频加热弯管机控制系统中的应用，并给出了控制系统关键子程序的设计方案。

The Paper introduces the application of PLC in Medium-frequency heating bender for large caliber pipe , and design scheme of the main control sub-routine is given .

CrO3对重力分离SHS陶瓷内衬弯管的影响

Influences of CrO_3 on Curved Ceramic-Lined Pipes Produced by Gravitational Separation SHS Process

20G钢锅炉弯管蚀孔的失效分析

Failure Analysis for Corrosion of 20G Steel Boiler Bend

介绍了石油化工设备加氢反应器90°弯管内壁TIG堆焊四自由度运动微机控制系统。

Movement control to 4 degrees of elbow pipe 90 ' during TIG cladding process using with microcomputer is introduced .

以向量运算的方法，把三维数控弯管的X、Y、Z几何数据变换成Y、B、C加工数据，并用程序实现之，并指导了对弯管数据的形成。

By method of vector calculation , the data of three-dimensional numerical bender from X 、 Y 、 Z geometric data was changed to Y 、 B 、 C working data , this process through the procedure was finished .

当F在Fr左右时，对于弯管，环形截面上存在八个涡，圆截面上存在四个涡，椭圆截面上存在四个或六个涡；

When F is about Fr , for curved pipes , the secondary flow appears eight vortexes for annular cross section and four for circular and four or six for elliptical ;

本文主要针对石化工业管道典型部件，如衬管、弯管等结构元件，进行CFD数值模拟，定量研究管道流动与腐蚀的关系，并进行结构优化。

This paper mainly aimed at typical petrifaction industry pipes such as liner-pipe , elbow etc. to be simulated by CFD software to quantitative study relation between pipe flow and erosion and optimize pipes structures .

本课题作为中国石油天然气集团公司“X80级管线钢管热煨弯管技术研究”的一部分。

This research topic is an integral part of the " Research on the Heat-stewed BendTechnology of X80 Pipe Steel " by CNPC .

应用数学规划在对弯管进行极限上限分析时，使用Mises屈服函数所计算的塑性耗散功的不可微性可导致收敛困难。

The non-differentiability of the plastic dissipation calculated through the Von-Mises yield function leads to convergence difficulties when using mathematical programming to solve upper bound limit analysis of pipe elbow .

DN1600×90°T型双承口球墨铸铁弯管研制

Development of DN1600 × 90 ° T-Type Double Socket Ductile Iron Elbow Pipe

方法对414例食管癌和贲门癌患者使用WGW弯管形吻合器行机械吻合。

Methods WGW anastomotic stapler was applied in 414 patients with esophageal and gastric cardial carcinoma .

在STAR-2003数控系统基础上，派生出STAR-2003W数控弯管机系统；

The STAR-2003W CNC pipe bending machine is derived from the STAR-2003 Universal CNC system based on Windows ;

通过对有限元分析中材料本构关系的确定、接触边界条件的处理、求解算法的确定等关键技术的处理，运用大型非线性有限元分析软件Marc，建立了数控弯管有限元模型。

The NC tube bending FEA model was built in large nonlinear finite element software & Marc by setting the material construction relationship of FEA method , handling the boundary condition , setting the solving algorithm and handling other critical technology .

用VC++6.0编程生成专用软件，根据用户输入的弯管参数完成计算和显示，同时将计算数据转换成DXF文件，供AutoCAD直接调用。

By special software based on VC + + 6.0 , user can input different parameters of the curved pipe to accomplish the calculation and display , meanwhile the relevant DXF file will be created and the data will be transferred into AutoCAD environment .

分析认为，其原因是弯管加工和运行过程中产生了拉伸应力叠加，以及CH4＋C2H4液体馏份中微量腐蚀介质的联合作用。

The SCC may be due to the superimposition of tensile stresses that take place during bending operation and working process of pure copper pipes , and the faint corrosion environment in CH4 + C2H4 liquid fraction .