The controlled pulsed plasma arc welding process 7,8, which. The result is a concentrated arc with maximum energy. Lincoln electric is the world leading manufacturer of arc welding equipment, consumables and accessories for stick, tig, mig, ux cored and submerged arc welding, as well as oxyfuel and plasma cutting. Introduction to welding technology page 3 of 9 of a welding rod is to supply filler metal to the joint. Scribd is the worlds largest social reading and publishing site. I have experience with a variety of welding tools, including blow torches, gas tungsten, gas metal arc, fluxcored arc, resistance welding, plasma arc and more. A process in which a continuous and consumable wire electrode and a shielding gas usually an argon and carbon dioxide mixture are fed through a welding gun.
The heat from the torch allows for the melting and mixing of the base metal and filler metal to form a solid weld. The arc is independent of the work piece and the work piece does not form a part of the electrical circuit. The general features of the arc welding processes in frequent use are outlined in the following sections. The metal shieldedgas welding is limited to the metal inertgas welding process. Electrode must be fed downward at a constant rate to keep the right arc length. Click the image to download the msword version or the image to download the powerpoint version or the icon for the pdf version of the apprentice notes. Paw plasma welding is similar to gas tungsten arc welding gtaw. A dc power source with a drooping characteristics and open circuits voltage of 70 volts or above is very much suitable for plasma arc welding. Descriptions and capabilities of nonarc welding processes. Simply fill out the invoice with your information, download the invoice in the format that works best for you. Feb 8, 2016 welding electrodes powerpoint template is one of the best powerpoint templates by. Oxyacetylene welding by matt scott introduction oaw is a welding process that heats the base metal with a controlled mixture of acetylene and oxygen gas.
Design of welding fixture for sample parts and user manual. Good powerpoint template for presentations on steel construction, welding, metalworking, machining, metal arc welding, etc. The creation of a weld between metals using these processes does not usually involve pressure but may utilize a. Paw has higher welding speed ranges from 120 mmmin to mmmin. Arc welding the term arc welding applies to a large, diversi. These patterns can be cut from metal with cnc machines.
Design of welding fixture for sample parts and user manual for motoman xrc welding robot abstract. A plasma cools off, the electrons move more slowly and are recaptured, and the plasma is no more unless the energy loss to its surroundings is replenished. The nontransferred arc plasma possesses comparatively less energy. The arc is struck between the electrode and the metal. Keyhole plasma over 100a produced by increasing the current level and the plasma gas flow. A free powerpoint ppt presentation displayed as a flash slide show on id. Plasma arc welding paw principle of operation principle of operation principle of operation tig vs. Medium plasma welding o welding current from 15a to 100a. These welding safety training powerpoints cover all the dangerous aspects of welding, and how you can combat them with safety precautions. Designshop specializes in providing high quality design files for plasma, waterjet, and laser cutting systems. In paw the heat source is an arc maintained between a nonconsumable electrode and the workpiece the arc is constricted by a cooled orifice that surrounds the electrode inert gas is supplied separately to the orifice and to a surrounding lowvelocity shielding flow p2.
The more restricted the welding procedure becomes to avoid service failure arc energy 16 welding variables. Ppt plasma arc welding powerpoint presentation, free download. May 02, 2017 compared to other arc welding processes, plasma arc welding process has better arc stability, less thermal distortion, and higher energy concentration, thus permitting deeper and narrower welds. Plasma arc welding has gained importance in small and medium scale industries manufacturing bellows, diaphragms etc because of less expensive and easy to. O arc length is varied up to 20mm o used for welding thin sheets 0.
Mig metalinertgas a fairtypical quality mig weld still hot. A voltage imposed on a plasma accelerates the conducting charges and can maintain a plasma indefinitely. Plasma arc welding paw is an arc welding process similar to gas tungsten arc welding gtaw. Compared to conventional welding technique, plasma arc welding paw is known without spatter and fume. If you own a plasma cutter or are thinking of purchasing one, this video is for you.
Dec 12, 2019 the plasma arc welding process is normally compared to the gas tungsten arc process. Ppt plasma arc cutting powerpoint presentation free to view id. Paw plasma arc welding pjpw plasma jet plasma arc welding gmgmma gasmixture shielded metal arc welding magm. It generates a very powerful arc plasma, similar to a laser beam. Welding basics download a free collection of ebooks. The cuts are made by a high temperature, high velocity gas jet generated by constricting an arc between a. I can operate different types of radial drills for cutting, such as drill presses, portable magnetic presses and punch presses. A primary study of variable polarity plasma arc welding. Following are the disadvantages of plasma arc welding.
A welding arc is a plasma maintained between oppositely charged electrodes. Arc welding presentation template for powerpoint and keynote. Jan 20, 2015 modes in paw micro plasma welding o welding current from 0. We manufacture a full line of products for welding schools, light to heavy duty metal fabricators, maintenance shops, home use and more. The preparation method of the sample is shown in figure 12. Keyhole welding o welding current above 100a, where the plasma arc penetrates the wall thickness. The plasma arc welding paw closely resembles the tungsteninert gas tig or gas tungsten arc gta welding process in that it also uses a nonconsumable tungsten. Arc welding is a process that fuses metal by heating it to a melting temperature with an electric arc created between an electrode and the metals being joined. Advantages and disadvantages of plasma arc welding,cutting. The flying sparks, hot workpiece, and hot equipment can cause fires and burns.
If you have an account, sign in now to post with your account. Plasma arc welding process principle, main parts, working. One example was the spray coating of the turbine blades of the moon bound saturn rocket. The shielding gas flows through the outside gas nozzle, providing an optimum gas shield to the weld seam. The electrode is then removed, breaking the arc between the electrode and the metal.
The arc is constricted with the help of a watercooled small diameter nozzle which squeezes the arc, increases its pressure, temperature and heat intensely and thus improves arc stability, arc shape and heat transfer characteristics. Download free welding invoice template create a professional invoice for your welding work with this customizable template. Welding welding is a materials joining process which produces coalescence of materials by heating them to suitable temperatures with or without the application of pressure or by the application of pressure alone, and with or without the use of filler material. Using wood templates with your plasma cutter is a cost effective and. Ppt arc welding powerpoint presentation free to download. During welding, the plasma arc slices through the metal producing a keyhole, with the molten weld pool flowing around the keyhole to form the weld. Presentation on plasma arc welding linkedin slideshare. Investigations on laser augmented plasma arc welding were already. It produces wider welds and heat affected zones compare to lbw and ebw. Proper safety attire welding gloves jacket safety glasses colored shield thickness current travel speed 18mild steel 40 amps 110 ipm. Ppt of plasma arc welding, detailed overview paw slideshare. A variety of metals can be welded with part thicknesses less than 6 mm. The eventual addition of wire is carried out on the outside of the torch. Welding safety training powerpoints atlantic training blog.
Guidelines for resistance spot welding welding equipment. Depress plasma start switch on torch begin cutting procedure. Dec 01, 2015 arc plasma comes out of the nozzle as a flame. Arc welding process that produces coalescence of metals by heating them with a. This theme is perfect for presentation on ironwork, spark, skill, etc. These applications normally demand repeatable welds on a near continuous basis using the meltin fusion.
Gas tungsten arc welding and plasma arc welding are typicalprocesses of this type. As with radiation exposure to the eyes, the length and number of times that you are exposed to high levels of noise determine the extent of the damage to your hearing, so be sure to avoid repeated exposure to noise. The significant difference is that the arc plasma is constricted by a nozzle to produce a highenergy plasma stream in which temperatures between 10 000 and 20 000c are attained. Here is a very brief account of the physics of paw with an eye to the needs of a welder. Ppt plasma arc welding powerpoint presentation free to. Welding basics download a free collection of ebooks 4052018 09. Modes in paw micro plasma welding o welding current from 0. This type of filler metal is often used for gas welding. Tungsten also called wolfram is a metal with a fusion point of more than 3300oc, which means more than double the fusion point of the metals which are usually welded. For steel or aluminum low skill level can achieve good weld medium heat input. Plasma is a high temperature ionised gas which is a mixture of positive ions. All metals amenable to gtaw or tig welding can be welded with the plasma arc process. All free powerpoints provided on this website have been created by third parties. High frequency generator and current limiting resistors.
The electric arc is formed between an electrode which is usually but not always made of sintered tungsten and the workpiece. Process, sensing, control and modeling this article introduces the basic principles of plasma arc welding paw and. Process characteristics of fibrelaserassisted plasma arc welding. Effects of shielding gas compositions on arc plasma and metal transfer in gas metal arc welding z. Free industrial worker at the factory welding closeup powerpoint templates are industrial worker with white background that you can download to make powerpoint presentations. Plasma arc welding paw plasma arc welding is a welding process utilizing heat generated by a constricted arc struck between a tungsten nonconsumable electrode and either the work piece transferred arc process or water cooled constricting nozzle nontransferred arc process. Arc welding template for presentation is laid out in a way that simplifies the complexities you may have previously encountered with keynote or powerpoint. If an electric arc between a tungsten electrode and the work is constricted in a crosssectional area, its temperature increases because it carries the same amount of current. Like tigw, paw also uses the tungsten electrode and inert gases for shielding of the molten metal. Explore welding quizzes and presentations from miller, covering topics like mig, tig and stick welding, basic electricity and filler metal selection. Tsai2,a 1school of energy science and engineering, central south university, changsha 410083, peoples republic of china 2department of mechanical and aerospace engineering, missouri university of science and technology. The carbon arc welding caw process is the oldest of all the arc welding processes and is considered the beginning of arc welding. Tig and plasma processes gases and welding equipment. It requires training and specialization to perform plasma welding.
Heberlein abstract arc plasma torches are the primary components of various industrial thermal plasma processes involving plasma spraying, metal cutting and welding, thermal plasma cvd, metal melting and. We offer the largest selection of free plasma cutter art patterns which are cutready and optimized for cnc machines. Principle of operation plasma arc welding is a constricted arc process. The thesis objective is comprised of two major parts, the first one is to prepare a concise manual for the motoman xrc arc welding robot, and the second one is design process of a welding fixture for simple joints.
The key difference from gtaw is that in paw, by positioning the electrode within the body of the torch, the plasma arc can be separated from the shielding gas envelope. It is easy to follow, and it comes with all the design features you need built right in. Good powerpoint template for presentations on metalworking, metallurgy, machining, gas metal arc welding, etc. A concentrated plasma arc is produced and directed toward the weld area. Plasma arc welding is an arc welding process wherein coalescence is produced by the heat obtained from a constricted arc setup between a tungstenalloy tungsten electrode and the watercooled constricting nozzle nontransferred arc or between a tungstenalloy tungsten electrode and the job transferred arc. Plasma arc welding is an arc welding process that melts and joins metals by heating them with a constricted plasma arc established between a tungsten electrode and the metals. Introduction to welding technology page 2 of 9 gas metal arc welding gmaw. Browse our collection of free plasma cutter art patterns.
This channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals this video explains plasma arc. Check and be sure the area is safe before doing any welding. Just as an arc flameas in atomic hydrogen welding, it can be moved from one place to another and can be better controlled. The difference is that in plasma welding, the arc is sharply constricted by a cooled gas nozzle through which a flow of plasma gas is directed. Plasma arc welding is a welding process utilizing heat generated by a constricted arc plasma jet struck between a tungsten nonconsumable electrode and either the work piece transferred arc process or water cooled constricting nozzle nontransferred arc process. The welding society defines carbon arc welding as an. A process that uses a nonconsumable tungsten electrode to produce the weld. The owners of these powerpoint presentations have no affiliation with atlantic training. Tig welding method and application tig welding definition the designation tig comes from usa and is an abbreviation of tungsten inert gas.
Low velocity plasma and diffused arc is generated in the tig welding while in case of paw very high velocity and coherent. The plasma welding consists only of the plasma arc welding process which works with a transferred arc. Arc energy heat input preheat and interpass temperature. Electric welding powerpoint template, backgrounds 08862. Owing to the characteristic of high welding quality, paw becomes more and more attractive in.
The arc is struck between the workpiece and the tip of the electrode. The fusing of two or more pieces of metal together by using the heat produced from an electric arc welding machine. Welding electrodes powerpoint template is one of the best. In electric arc welding, the term electrode refers to the component that conducts the current from the electrode holder to the metal being welded. Accidental contact of electrode to metal objects can cause sparks, explosion, overheating, or fire. Paw plasma arc welding the contribution of energy necessary for welding is ensured by the passage of an electric arc in an atmosphere of inert plasma gas between an infusible electrode and the parts to be assembled. Plasma arc welding shows its greatest advantages in the welding of high volume repetitive production operations. Definitions and terminology associated with nonarc welding processes. Effects of shielding gas compositions on arc plasma and.