Automated task planning for industrial robots and laser scanners for remote laser beam welding and cutting

Remote laser beam welding and cutting can be applied to a wide range of applications within the manufacturing technology domain. With high process rates, consistent high quality welding seams and cutting edges at various contours these technologies offer an increased flexibility to process a wide variety of work pieces. To take advantage of the process the laser beam must be positioned precisely on the work piece. Programming a system of an industrial robot combined with a laser beam deflecting scanner manually is a very time consuming job. Programming any “on the fly” movements, a synchronously movement of the scanner and the robot, is even more difficult. This paper describes challenges and a concept for the automated programming of the two devices to apply the advantages of remote laser beam welding and cutting.     

氧-天然气切割和焊接技术研究

研究了氧-天然气金属切割和焊接技术.结果表明:通过设计出优质快速切割喷嘴和双层焊接焊炬,采用合适的切割和焊接工艺规范和措施,氧-天然气切割和焊接技术能获得良好的切割质量和焊接质量,且能满足一般效率要求;与氧-乙炔气体相比,氧-天然气切割和焊接技术成本最低,具有显著的推广应用价值.     

Hydrodynamical phenomena in the process of laser welding and cutting

Abstract

The main objective of the paper is to outline the 'bridges' existing between the outcomes of fundamental researches and the results of investigations in the field of industrial laser materials processing (LMP). An analysis is presented on the models based on non-stationary hydrodynamic phenomena caused by deeply penetrating high power CW laser beam into materials. This is typical of laser welding (LW) and laser cutting (LC). A physical analysis pertaining to melt removal and melt layer instability mechanisms of gas jet assisted CW–CO₂ laser fusion cutting is presented. The models deliberated here are melt squeezing out by gas pressure gradient, melt dragging by the friction force between melt surface and gas flow, formation of moving shelves at the cutting front. In case of high laser intensity, radiative flux interacts with material causing dynamical thermal transport onto the surface and phase transition at solid–liquid–gas interfaces. The solution is based on the non-stationary variables. Under these conditions the Mach number varies significantly due to laser intensity associated with laser flux energy instabilities. The connection among material surface temperature, laser intensity, laser flux and pressure in the plasma cloud is brought out. In addition, novel mechanisms based on hydrodynamics are proposed.     

液化石油气在割焊技术中的应用

开发了一种液化石油气割焊设备，采用液化石油气进行切割与焊接，与乙炔相比，不但更具有经济性、安全性和高的切口质量，而且对环境污染少。它的开发与利用必将越来越为人们所重视。     

便携式相贯线切割焊接一体机的设计

支管和支管间狭小空间的相贯线自动焊接是一个难题,同时,一般相贯线焊接设备的吊装不便也限制了相贯线自动切割、焊机的大规模推广应用。根据对相贯线数学模型的研究,在充分了解了焊接生产需求和焊接工艺的基础上,设计了一种用于接管与筒体正交的马鞍形焊缝的便携式的相贯线切割、焊接一体机。通过采用轻量化机械结构设计,达到了便携式效果。重点介绍了控制系统相关内容,以及无线遥控器在线微量调节焊机参数的方案。     

粉尘捕捉和分离技术在激光焊接切割中的应用

激光技术广泛运用于不同材料的焊接和切割中,由于切割或焊接中会产生大量的粉尘和烟尘．这种烟尘对工人的健康和整个工作环境都是有害的,因此要使用高效的除尘系统。防火保护措施也是很有必要,应采取一些特殊装置来尽量降低火灾的危险性。尤其是有机的或者非金属物质,在激光切割或雕刻当中,会产生粘性的颗粒物和气味,而这些对于普通的除尘系统而言是一个很大的难题。     

多功能激光切割焊接机的设计与研究

激光切割焊接机机械部分的设计是影响激光加工效率和质量的重要因素。本文设计了一种直线电机驱动的高速、高精度多功能激光切割焊接机,利用有限元分析软件ANSYS研究了多功能激光切割焊接机横梁的静、动态特性。其方法和结论对激光切割焊接机产品的研发有一定的指导意义和参考价值。     

Ultrasonic cutting with simultaneous welding of plastic components

A method of ultrasonic cutting with simultaneous welding of plastic components is described. It is shown that filter components can be produced by ultrasonic cutting with simultaneous welding.     

氢氧气体焊割设备研究

应用电化学理论的水解原理而研究开发一种产气量大、耗能低、效率高的氢氧气体发生器，将生成的H2和O2经过气液分离、混合添加剂、安全防护等方面处理，即可代替乙炔气体进行工业气焊、气割，具有比乙炔的工作效率高、加工质量好、节能、环保、使用简单等优点。