Adopting new embedded digital control technology to flexibly achieve various characteristics and pulse wave form , to better match and adjust welding parameters and to realize kinds of welding of multi - functions and different materials 设计了新型嵌入式数字化控制技术，通过软件变换，能柔性实现多种特性、多种脉冲波形，多种焊接参数的优化匹配与调节，实现多种功能、多种方法、多种材料的焊接
Through the man - machine interaction system which consisted of lcd ( liquid crystal display ) and keyboards , we can select welding parameters , such as the way of welding , diameter of the wire , wire feed speed , current , voltage and so on 主要过程是:通过lcd ( liquidcrystaldisplay )与键盘组成的人机交互系统选择已存储在单片机flash中的焊接参数,包括焊接方法、焊丝直径、送丝速度、焊接电流、焊接电压等。
If the weld spot size is the same , the welding - parameter both high voltage , short pulse width and low voltage , long pulse width can get the same pws of lh . but the range of influence of thermal stress by long pulse is larger than by high voltage 在光斑尺寸相同的条件下,高电压小脉宽和低电压大脉宽可以使激光锤校正偏移达到相同的效果,但是高电压小脉宽的焊接参数比低电压大脉宽的焊接参数对材料的热应力影响区要小。
The control panel of this preprocessing system is simple and convenient . the friendly interface between computer and human allows the users easy to complete all the preprocessing operations , including the model ’ s meshing , the setup of the material parameter and welding processing parameter , the initial conditions and boundary conditions ’ definition etc , preparing for the simulation subsequently . so any operator with lack of knowledge in fem or english can finish the welding simulation during using this preprocessing system 该前处理系统界面简洁明了,操作简单方便,用户按照该系统界面进行操作即可完成模型网格划分、材料性能参数的输入、热源模型选择及焊接参数的输入、以及初始条件和边界条件的设置添加,为模拟计算做好准备,从而使工厂的一般技术人员也能完成焊接过程的模拟计算。
Aimed at the automatic welding of the air - separate equipments . a computer control system for double - side automatic tig erect welding has been developed in this paper , which can keep the welding parameters of two welding torches consistent , and adopt a high - power and centralized energy fountain , and can take warm - up casually . the control system can assure a higher welding quality and a better work condition and a higher productivity than before 为实现空分设备的焊接自动化，本文研究开发一种双面自动tig立焊计算机控制系统，采用大功率和能量集中的热源，克服了由于预热而使手工焊接工人劳动环境的恶化，同时使得两把焊枪的焊接参数保持一致，从而可得高的焊接质量，改善焊工的劳动条件，大大提高劳动生产率。
The explosive welding specimen were also annealed in vacuum at various elevated temperature from 1000 to 1300 . optic microscope , sem , tem and eds ( electron diffraction scattering ) techniques are applied to observe the microstructure and the element profiles of the welding interface and the interdiffused layer , reveal the interdiffused performance of alloy elements at elevated temperature , and analyze the structure and composition of the precipitated phases . moreover , the tensile strength of welding line with the two different techniques and various welding parameters were carried out 采用金相、扫描电镜、透射电镜、能谱等多种实验手段对焊接结合层的微观组织结构、高温下nb - 1zr与不锈钢合金元素的互扩散行为，形成的互扩散层的成分、金相组织和扩散层中的析出相的相组成和相结构等，都进行了较为详细的分析，并且对在不同工艺、不同焊接参数下焊接的nb - 1zr合金和不锈钢的焊缝做了强度实验研究。
Its main contents include : ( 1 ) establish friendly human - computer interface , which make it convenient to input and store the often - used welding parameters . ( 2 ) establish the communication between pc and pmac , transfer the internal function of pmac by loading the dll in the program to harmonize the moving of multi - axes . ( 3 ) develop vxd via vtoolsd to realize hardware interrupt , make the communication between vxd and application program , utilize the interrupt to read data real - timely 软件设计的主要内容为： ( 1 )编制了友好的人机界面，能方便地完成焊接参数的输入及常用焊接参数的存储； ( 2 )建立pc机与pmac的通信接口，通过加载动态链接库在程序中调用pmac的内部函数，控制多轴的协调运动； ( 3 )利用vtoolsd研制vxd实现硬件中断，建立vxd和应用程序的通信接口，通过中断来实现数据的实时读取。
The main content is design of digital man - machine interface system , a speed regulating system of good stabilization and dynamic performance ; software for appraising the performance of wire feeder . the first , a digital man - machine interface system using at89s8252 singlechip is designed . the system uses sd7218a keyboard / display chip with serial bus interface 首先,人机交互系统选用at89s8252为核心控制芯片,选用具有串行总线接口的sd7218a键盘/显示芯片完成了数字化人机交互系统软、硬件设计;采用rs - 485总线实现主控系统和人机交互系统的数据交互;系统采用数字编码器和键盘配合的方式实现焊接参数的选择和设定,同时还具有最优参数存储、调用等功能。
In this paper , a three - dimensional brick element model with temperature - varied material properties was built . an ansys parametric design language ( apdl ) was used to simulate the temperature distribution , the distribution of the residual stresses , and pws in process of laser hammering with variant voltage and pulse width 论文中建立了激光二极管封装的三维有限元模型,利用通用有限元软件ansys ,编制apdl程序,模拟仿真激光锤在不同焊接参数(电压、脉冲宽度等)的作用过程的温度场、应力场以及焊后偏移校正量。
The result shows that the new control system has convenient parameter modification , perfect controlling flexibility , rapid dynamic response speed , stable welding procedure ; the das of welding parameters has strong ability of anti - disturbance and the data is reliable . the control effect and practicability of the diagnosis system judging the welding quality are both good by using the characteristic values of welding process such as the percentage of the flashing time . gray - spots flaw in flash welding joints of rail is the least when the pole moves to and fro at the same velocity and the speed is slow 结果表明：新型控制系统参数设置修改方便，控制柔性好，动态响应速度快，焊接过程稳定；焊接参数采集系统抗干扰能力强、数据可靠；以闪光时间百分比等焊接过程特征量为判据诊断焊接质量效果好，实用性强；当动立柱的前进、后退速度相同且为低速时，钢轨接头中灰斑缺陷数量最少。
