Recommended practices for electron beam welding and. Machine is intended for electron beam welding of drill bits with diameter up to 17. Electron beam freeform fabrication for cost effective near. Ptr is an electron beam welding systems manufacturer and contract welding service provider on the leadingedge of electron beam and vacuum welding technology. Distortion and metallurgical effects are much less than other types of welding such as tig and mig. Electron beam welding parts, working, applications with. Schematic of electron beam machine for welding and surface modification 36. Electron beam machining ebm is a thermal machining process in which highvelocity electrons concentrated into a narrow beam are used for instantly heating, melting, or vaporizing the material. The laser is also used to perform turning as well as milling operations but major application of laser beam is mainly in. Laser beam machining or more broadly laser material processing deals with machining and material processing like heat treatment, alloying, cladding, sheet metal bending. In addition to making eb and laser welding equipment, ptr assists customers with weld process development and provides maintenance and spares support for electron beam welding systems. Generally, it is the most practical and most efficient configuration to use. Electron beam welding provides consistent weld size and high joint strength. Its precise, high strength nature is wellsuited for durable biocompatible metal instruments that are used in challenging intraoperative environments.
Noone has more experience or expertise in the application of electron beam welding than electron beam processes. A free powerpoint ppt presentation displayed as a flash slide show on id. Electron beam welding ebw is a specialist metal joining process specifically used for producing highquality joints without causing any major distortion. The kinetic energy, which turns into heat upon impact, causes the two pieces to fuse together as a welded component. Eb welding permits joining of reactive and refractive materials. Electron beam welding is a welding process that uses the heat produced by a beam of high energy electrons.
Located at the same premises as ebe, our associate company, electron beam engineering services ebes provides electron beam welding and laser beam welding systems and weld tooling accessories. Electron beam machining is a thermal process used for metal removal during the machining process. In the electrical beam machining, electrical energy is used to generate the electrons with high energy. With the discovery of the deep penetration welding in. Ebw and lbw offer superior quality of welds on a wide variety of components, making it more versatile than. Tig welding aluminum fabrication sheet metal forming 2 ovals into 1 round ypipe duration. Electron beam technologies has three electron beam irradiation lines which are capable of producing electron beam energies from 425,000 volts up to 1,500,000 volts. Electron beam welding experts electron beam processes. Electron beam welding nadcap electron beam welding. When you visit our location we have a physical copy of our andrews hitec corporation brochure. The sample surfaces were ground and then cleaned with ethanol.
Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. Electron beam machining has been used in industry since the 1960s, initially in. This will generate high heat energy and melts and vaporize metal from work piece. To learn about various unconventional machining processes, the various process. Electron beam welding ptrprecision technologies, inc. Electron beam welding process, applications and equipment. Ppt laser beam machining powerpoint presentation free. Shaping lens, feed powder directly into a molten pool created by a laser. Electrons hit the workpiece and their kinetic energy is transformed to the thermal energy heating the metal so that the sides of the workpiece can be joined and a weld can be formed after freezing. Pdf format this file type includes high resolution graphics and schematics when applicable. The workpieces melt and flow together as the kinetic energy of the electrons is transformed into heat upon impact. Akutsu, application of electron beam welding to steam turbine diaphragms, beam technoi, lectures of the int. Electron beam irradiation service to specification is available for all continuous product such as.
Electron beam welding is so clever that many people dont appreciate its potential. Here a steam of high speed electrons impinges on the work surface so that the kinetic energy of electrons is transferred to work producing intense heating. From chambers measuring 1 cubic foot to the largest eb welder on the east coast, ebtecs electron beam welding services handle fabrication challenges with precision and speed. Introduction ebm electron beam machining ebm is a thermal material removal process that utilizes a focused beam of highvelocity electrons to perform highspeed drilling and cutting. A schematic representation of an electron beam welding machine is shown in.
Electron beam machining has been used in industry since the 1960s, initially in nuclear and aerospace welding application. The commercial application of electron beam welding ebw was. The main applications for this high efficiency welding process are. Objective describe the basic mechanism of welding in ebw. The application of electron beam welding for the joining. A 2 m3 chamber, 100 kw, electron beam welding machine, showing the open vacuum chamber.
These high energy electrons are produced by a filament or a cathode. Welding of thick to thin material and dissimilar metals is easily accomplished. Joint preparation for electron beam welding thin aluminum alloy. Electron beam welding electron beam welding ebw electron beam welding is ppt. Figure 1 schematic representation of ebw machine 4.
The electron beam as a tool is the business basis of all company units of global beam technologies ag. This process is used in many applications, including drilling, cutting, annealing, and welding. The cathode is generally made of tungsten or tantalum. Electron beam machining 1 is a metal removing process where high velocity. Electron beam welding pep precision engineered products. Electronbeam welding ebw is a fusion welding process in which a beam of highvelocity electrons is applied to two materials to be joined. Pep offers fully cnc or manual electron beam manufacturing for delicate parts. The electron beam polishing equipment technology is brought forward and its characteristic is explained because general processing method cant obtain preferable machining efficiency and product.
Electron beam welding llc 6940 hermosa circle buena park, ca 90620. Electron beam welding is a machine controlled process, with welding carried out in vacuum with no filler material, resulting in exceptional weld quality and repeatability. Electron beam machining ebm diagram, working, advantages. Electron beam machining equipment the basic functions of any electron beam gun are to generate free electrons at the cathode, accelerate them to a sufficiently high velocity and to focus them over a small spot size. Welding of different materials high welding speed high process assurance viewing systems.
A pulsating stream of highspeed electrons produced by a generator is focused by electrostatic and electromagnetic fields to concentrate energy on a very small area of work. Electron beam welding electron beam welding ebw electron beam welding is a welding process utilizing a heat generated by a beam of high energy electrons. Sayegh, application of electron beams in welding metals, cot 6th general assembly cenim 6th asamblea general del cenim i1, madrid, spain, 811 oct. Electron beam technology is used worldwide with an increasing tendency. Electron beam welding drastically expands where welds can be created and the strength and quality of those welds. The electron beam at atmosphere nvebw a rediscovered welding. Electron beam welding technology electron beam engineering, inc.
The penetration of the weld can be precisely adjusted from near zero to as much as 6 inches. Ebm and lbm are typically used with higher power density to machine materials. Electron beam machining is a nonconventional machining process or nontraditional process. Laser beam machining or more broadly laser material processing deals with machining and material processing like heat treatment, alloying, cladding, sheet metal bending etc. Notes on electron beam machining ebm me mechanical.
Ebw is often performed under vacuum conditions to prevent dissipation of the electron beam. Depending upon the intensity of heating the workpiece can melt and vaporize. The theory of electronic beam machining is explained in detail, which include electronic beam come into being. Post process machining, such as welding, brazing, machining or even extrude honing, is often required if tolerances tighter than 0. Ebm can be used for very precise cutting or boring of a wide variety of metals. The parts are built up layerbylayer by the electron beam melting ebm process in a vacuum chamber. It is a nontraditional machining process in which no physical tool is used. Electron beam equipment eb welding machines electron. In the electron beam machining process, a high velocity focused beam of electrons are used to remove the metal from the workpiece. Electron beam welding using ebw consists of a highly focused, high speed stream of electrons that bombard the component to be welded. Such processing is carried out utilizing the energy of coherent photons or laser beam. T e c h p d m 1 st y e a r contents objective introduction history electron beam welding principle of electron beam welding major equipments of ebw working advantages limitations applications case studies references. Pdf electron beam welding, despite a long history and widespread arc and.
Contact electron beam engineering, electron beam engineering provides services throughout the u. Electron beam welding, despite a long history and widespread arc and laser technology, is still widely used in industry. Electron beam welding electron beam engineering, inc. Causes and control of welding cracks in electronbeam. The beam is very narrow and the heat affected zone is minimized. Surface finish is better and kerf width is narrower than those for other thermal cutting processes. The square groove butt joint, illustrated in figure 1, is a basic joint design for electron beam welding. In addition to building advanced eb systems, ptr provides electron beam welding services using stateofthe art equipment supported by experienced welding engineers. Even today, new applications are being developed and used industrially, especially where other beam. There are several different types of welding, including metal inert gas mig, arc, electron beam, laser, and stir friction. Welding is also widely used to slice apart large metal structures by melting through them. The use of this design assumes accessibility to both surfaces for machining and inspection purposes. The maximum power of the electronbeam welding gun used in the experiments was 6 kw, and the accelerating voltage, beam current, and welding speed used in the welding process were 55 kv, 25.
Rapid manufacturing with electron beam melting ebm a. Laser beam machining lbm is thermal processes considering the mechanisms of material removal. Steigerwald eb machines, for microwelding and drilling 1970 with. Until then, you can download it to your computer as a pdf file 1. Electron beam machining ebm is a process where highvelocity electrons concentrated into a narrow beam are directed toward the work piece, creating heat and vaporizing the material. Ppt laser beam machining lbm powerpoint presentation. Ptr provides the technology to achieve the highest quality welds for the most. Electron beam welding an overview sciencedirect topics. Fast response, closed loop beam current control data acquisition system. This edition adds three new practical examples and adaptations of the electron beam process, including electron beam braze welding ebbw, electron beam cutting ebc and drilling. Laser stands for light amplification by stimulated emission of radiation. Materials considered difficult to weld by conventional processes may often be. The mechanism of material removal is primarily by melting and rapid vaporisation. The file is transferred to preprocessing software where the model is sliced into thin layers.
We are a leading provider of electron beam and laser beam welding services in north america. In this process, a beam of high energy electrons is directed towards the joint that needs to be fused or welded. This led to the development of the fol lowing proposed equation for represent. If specific tolerances or surface finish is required, a. Electron beam machining can machine metallic as well as nonmetallic workpiece. Further, the beam needs to be manoeuvred if required by the gun. On completion of the cad to metal process the netshape part is cleaned and can be finished as necessary by conventional methods. Laser beam can very easily be focused using optical lenses as their wavelength ranges from half micron to around 70 microns. Recent developments in electron beam welding machine technology have realised a local method of electron beam welding, whereby the electron beam gun is.