Для какого вида сварки используются сварочные трансформаторы: принцип действия, устройство и классификация

различные сварочные аппараты постоянного и переменного тока

Сварочные трансформаторы — это конструкции для ручной, автоматической, дуговой сварки деталей. Их условно можно разделить на бытовые и профессиональные аппараты в зависимости от технических характеристик. Получаемое электричество перерабатывается до нужного значения для устройства. Принцип действия сварочного трансформатора в этом и заключается. Аппарат состоит из нескольких узлов, которые вместе образуют электрическую дугу.

Конструкция устройства

Схема устройства не является сложной. Многие пользователи способны самостоятельно заняться сборкой такой конструкции. Самая простая схема сварки будет работать на одной фазе. Но этого более чем достаточно.

Она состоит из трёх составляющих:

• магнитный привод или сердечник;
• первый слой обмотки;
• второй слой обмотки.

Таким элементом, как магнитный привод или сердечник, является деталь из ферромагнитного сплава с замкнутым контуром. Первый слой обмотки соединяется с сетью, а второй направляется на массу и держатель электрода, которым непосредственно осуществляется сварка. При этом контур теряет сопротивление, а электромагнитная связь повышается.

Но это конструкция самой простой модели. Более профессиональные модели имеют и дополнительные элементы, такие как дроссель и другие.

Полная конструкция обыкновенного сварочного трансформатора состоит из следующих элементов:

• сердечник;
• держатель коробки;
• зажим для сцепки проводов;
• металлический ящик;
• жалюзи для охлаждения;
• рукоятка;
• болт;
• крышка конструкции;
• вертикальный винт;
• винтовая гайка;
• первичная и вторичная обмотка трансформатора.

Принцип работы аппарата

Работает сварочный трансформатор по такому алгоритму: постепенно понижается напряжение до 55−80 В, и в то же время повышается сила тока до 50−450 ампер. В работе подобная конструкция в основном функционирует благодаря принципу переменного тока. Но есть и альтернативные модели, которые выдают постоянный ток. Также встречаются названия — выпрямительные сварочные аппараты.

Работает оборудование похожим образом. После соединения с сетью по первичному контуру проходит переменный ток, который и создаёт магнитное поле. И в первой, и второй обмотке проходит электрическая сила. Её можно определить в зависимости от количества витков обмотки.

К примеру, первая обмотка имеет 200 витков, а вторая 10. Коэффициент в этом случае выходит 200:10 = 20. Когда такое оборудование подключаем к обычной сети, то на выходе мы получим примерно одиннадцать ватт.

Для смены нагрузки сварки зачастую меняют зазор магнитного привода. Если зазор увеличить, то сила тока уменьшится. Если уменьшить зазор, то, соответственно, увеличится. Подобрать нужное напряжение можно, узнав количество витков.

Из чего состоит сварка

Такое устройство, как сварка, позволяет понизить напряжение и в этот же момент увеличить силу тока. Это и даёт возможность нагревать металл до нужной для его плавления температуры. Параметры силы и напряжения определяются в момент проектирования и создания трансформаторной сварки. Под определённые функции аппарат оборудуется специальными деталями, которые и определяют назначение работы конструкции.

Кроме первой и второй обмоток и магнитного привода, трансформатор имеет такие детали, как винт с вертикальной резьбой и рукоятка, позволяющая ему вращаться, винтовая гайка и зажимы. Также сварка оборудована корпусом с вентиляцией и подвесной системой, которая защищает сварку от внешних повреждений.

В трансформаторах, работающих по принципу переменного тока, есть и другие детали, позволяющие облегчить работу мастера.

Дополнительные узлы аппарата

Трансформатор для сварки как однофазный, так и трёхфазный и выпрямляющий, может иметь и определённое количество дополнительных узлов. С их помощью аппарат будет работать более качественно.

В качестве дополнительных узлов могут выступать:

• дополнительные обмотки;
• стабилизаторы;
• конденсаторы;
• регуляторы фаз.

Некоторые конструкции оборудованы подвижным шунтом. Расстояние между обмотками меняется за счёт образования новой детали, а не за счёт движения второго слоя обмотки. Дополнительной деталью является шунт, который будет менять зазор между обмотками. Ещё одна обмотка даст возможность регулировки напряжения.

И заводские профессиональные модели, и бытовые, как правило, требуют дополнительного сопротивления. Профессиональные мастера могут произвести соответствующую регулировку. Специальные возможности возникают и без разведения обмоток. Опытный мастер может сделать, таким образом, тонкие или толстые швы.

Подобное сопротивление может быть сделано в виде цельного корпуса. В нём расположены различные контакты, с помощью которых можно регулировать сопротивление.

Различные виды конструкции

Принцип действия бытового или профессионального образца определяет то, какими техническими характеристиками владеет определённый прибор. В связи с этим образовалось множество принципов и факторов классификации подобной аппаратуры. Например, на многопостные и однопостные. Последние предназначены исключительно для бытового использования. Они рассчитаны на инвертор в 3−9 кВт. Домашние сети не рассчитаны на мощность более 10 кВт.

В отличие от предыдущих, многопостные конструкции имеют сложное строение. Они считаются профессиональными и применяются с мощностью более 10 кВт. С одним таким аппаратом может одновременно работать до десяти человек.

Также можно разделить трансформаторы по фазному принципу на однофазный и трёхфазный аппарат. Существуют модели, которые могут переключаться на различное напряжение в сети.

Для применения в домашних условиях могут подойти однофазные агрегаты, а для профессионального уровня трёхфазные. По этому фактору можно определить и напряжение на выходе. Толстые детали можно сварить исключительно трёхфазным аппаратом, так как однофазные не смогу этого сделать.

Классифицировать можно также и по типу аппарата. В основном выделяют три лидирующие группы сварок:

• Аппараты с минимальным рассеиванием магнитного поля. Характерно для такого аппарата наличие дросселя.
• Конструкции с большим рассеиванием магнитного поля. Они имеют довольно сложную схему. Основные её детали — это несколько обмоток, конденсаторов и стабилизаторов. Не исключено присутствие и других дополнительных элементов.
• Тиристорные конструкции. Оборудованы фазорегулятором. Характерные особенности и преимущества — это маленький вес, большая сила тока.

Такую классификацию можно применять только к устройствам с переменным током. Сварочные трансформаторы постоянного тока к этому не относятся. Для подобных конструкций характерными особенностями являются большие габариты, сложная схема и наличие выпрямителя. Самодельный сварочный аппарат постоянного тока своими руками может сделать только профессионал.

Они являются более надёжными и удобными в работе. Такой сварочный аппарат считается профессиональным при условиях использования его на постоянном токе. Этим прибором можно работать с различными видами цветных металлов. Их стоимость довольно высока, и в связи с этим применяются для сварки только профессиональными мастерами. Домашние требования может исполнить и сварочный трансформатор переменного тока.

Все модели переменного тока можно сделать самостоятельно, как и трансформатор для полуавтомата своими руками. В качестве исходного материала можно использовать трансформаторы советского производства с двойной намоткой.

Холостой ход

Сварочные конструкции могут работать как под напряжением, так и в режиме холостого хода. Когда создаётся сварочный шов, между электродом и непосредственно объектом сварки замыкается второй слой обмотки. С помощью электрического тока металл плавится и соединяет две детали в одну конструкцию. Когда детали связаны между собой, аппарат прекращает работу и включает состояние ожидания (холостой ход).

Сборка конструкции своими руками

Все элементы будущей конструкции должны быть на отведённых местах и состоять из металла и текстолита.

По правилам сборки и большинству схем выпрямитель находится вблизи с трансформатором, а дроссель на одном уровне с выпрямителем. Регулятор напряжения должен находиться на панели аппаратного управления. Как основа для конструкции подойдёт и сталь, но рекомендуется использовать алюминий.

Можно использовать и приобретённый корпус для аппарата, например, основы для системного блока компьютера или т. п. Но главное — это прочность и надёжность конструкции.

Важно и то, что тиристоры должны размещаться на отдельной плате и далеко от трансформатора. Далеко от него также должен быть расположен выпрямитель.

Причиной такому расположению является сильное нагревание дросселя и непосредственно трансформатора.

Originally posted 2018-04-06 09:08:41.

90000 Types of Arc Welder 90001 90002 DC inverters 90003 90004 Unlike traditional arc welders, modern DC inverter arc welders are very small, light and portable. Even the cheap ones available from as little as £ 100 function well, though the more expensive ones (up to £ 500) will be much more robust and will normally last much longer. 90005 90004 90007 Pros: 90008 90005 90010 90011 Very efficient – they can run up to about 140 amps on a 13 amp 240V supply, and tend to have have good duty cycles (you can weld for longer on higher settings).90012 90011 Small, lightweight and very portable. Generally less than 10kg in weight. 90012 90011 DC output results in easy arc starting 90012 90011 Most inverters have features such as hot starting to improve the ease of starting, and a soft finish to reduce the crater at the end of a weld. 90012 90011 All but the cheapest have 70V or 80V OCV (open circuit voltage) 90012 90011 Most can be used for scratch start TIG.More expensive ones tend to have HF (high frequency) start functions for TIG welding. 90012 90011 Pricier ones have features such as “arc force” which adjusts the voltage on the fly to cope with dirty plate. 90012 90025 90004 90007 Cons: 90008 90005 90010 90011 Inverter machines are complex electronically, and repairs can be very expensive. The cheaper ones are sensitive to knocks and spikes in input voltage.The more expensive ones have more protection – some are designed to withstand being dropped from 0.5m. 90012 90025 90004 90007 Verdict: 90008 90005 90004 DC inverters are the sensible buy for anyone new to arc welding. Even the cheapest ones tend to weld very nicely, the downside of the cheap ones being that cheap components that do not last very well. 90005 .90000 Types of Welding 90001 90002 90003 Gas Welding 90004 90005 90002 Gas welding is accomplished by heating the ends or edges of metal parts to a molten state with a high temperature flame. The oxy-acetylene flame, with a temperature of approximately 6,300 ° Fahrenheit (F), is produced with a torch burning acetylene and mixing it with pure oxygen. Hydrogen may be used in place of acetylene for aluminum welding, but the heat output is reduced to about 4,800 ° F. Gas welding was the method most commonly used in production on aircraft materials under 3/16-inch in thickness until the mid 1950s, when it was replaced by electric welding for economic (not engineering) reasons.Gas welding continues to be a very popular and proven method for repair operations. 90005 90002 Nearly all gas welding in aircraft fabrication is performed with oxy-acetylene welding equipment consisting of: 90005 90010 90011 Two cylinders, acetylene and oxygen. 90012 90011 Acetylene and oxygen pressure regulators and cylinder pressure gauges. 90012 90011 Two lengths of colored hose (red for acetylene and green for oxygen) with adapter connections for the regulators and torch. 90012 90011 A welding torch with an internal mixing head, various size tips, and hose connections.90012 90011 Welding goggles fitted with appropriate colored lenses. 90012 90011 A flint or spark lighter. 90012 90011 Special wrench for acetylene tank valve if needed. 90012 90011 An appropriately-rated fire extinguisher. 90012 90027 90002 90005 90002 The equipment may be permanently installed in a shop, but most welding outfits are of the portable type. [Figure 5-1] 90031 90031 Figure 5-1. Portable oxy-acetylene welding outfit. 90005 90002 90003 Electric Arc Welding 90004 90005 90002 Electric arc welding is used extensively by the aircraft industry in both the manufacture and repair of aircraft.It can be used satisfactorily to join all weldable metals, provided that the proper processes and materials are used. The four types of electric arc welding are addressed in the following paragraphs. 90005 90002 90005 90002 90043 Shielded Metal Arc Welding (SMAW) 90044 90005 90002 Shielded metal arc welding (SMAW) is the most common type of welding and is usually referred to as “stick” welding. The equipment consists of a metal wire rod coated with a welding flux that is clamped in an electrode holder that is connected by a heavy electrical cable to a low voltage and high current in either alternating current (AC) or direct current (DC), depending on the type of welding being done.An arc is struck between the rod and the work and produces heat in excess of 10,000 ° F, which melts both the material and the rod. The welding circuit consists of a welding machine, two leads, an electrode holder, an electrode, and the work to be welded. [Figure 5-2] 90047 90047 Figure 5-2. Typical arc welding circuit. [Click image to enlarge] When the electrode is touched to the metal to be welded, the circuit is complete and the current flows. The electrode is then withdrawn from the metal approximately 1/4-inch to form an air gap between the metal and the electrode.If the correct gap is maintained, the current bridges the gap to form a sustained electric spark called the arc. This action melts the electrode and the coating of flux. 90005 90002 As the flux melts, it releases an inert gas that shields the molten puddle from oxygen in the air to prevent oxidation. The molten flux covers the weld and hardens to an airtight slag that protects the weld bead as it cools. Some aircraft manufacturers, such as Stinson, used this process for the welding of 4130 steel fuselage structures.This was followed by heat treatment in an oven to stress relieve and normalize the structure. Shown in Figure 5-3 is a typical arc welding machine with cables, ground clamp, and electrode holder. 90005 90052 90052 Figure 5-3. Stick welder-Shielded Metal Arc Welder (SMAW). 90002 90043 Gas Metal Arc Welding (GMAW) 90044 90005 90002 Gas metal arc welding (GMAW) was formerly called metal inert gas (MIG) welding. It is an improvement over stick welding because an uncoated wire electrode is fed into and through the torch and an inert gas, such as argon, helium, or carbon dioxide, flows out around the wire to protect the puddle from oxygen.The power supply is connected to the torch and the work, and the arc produces the intense heat needed to melt the work and the electrode. [Figure 5-4] 90059 90059 Figure 5-4. Metal inert gas (MIG) welding process. [Click image to enlarge] 90005 90002 90005 90002 Low-voltage high-current DC is typically used with GMAW welding. Figure 5-5 shows the equipment required for a typical MIG welding setup. 90005 90066 90066 Figure 5-5. MIG welding equipment. [Click image to enlarge] This method of welding can be used for large volume manufacturing and production work; it is not well suited to repair work because weld quality can not be easily determined without destructive testing.Figure 5-6 depicts a typical power source used for MIG welding. 90068 90068 Figure 5-6. MIG welder-gas metal arc welder (GMAW). 90002 90043 Gas Tungsten Arc Welding (GTAW) 90044 90005 90002 Gas tungsten arc welding (GTAW) is a method of electric arc welding that fills most of the needs in aircraft maintenance and repair when proper procedures and materials are used. It is the preferred method to use on stainless steel, magnesium, and most forms of thick aluminum. It is more commonly known as Tungsten Inert Gas (TIG) welding and by the trade names of Heliarc or Heliweld.These names were derived from the inert helium gas that was originally used. 90005 90002 The first two methods of electric arc welding that were addressed used a consumable electrode that produced the filler for the weld. In TIG welding, the electrode is a tungsten rod that forms the path for the high amperage arc between it and the work to melt the metal at over 5,400 ° F. The electrode is not consumed and used as filler so a filler rod is manually fed into the molten puddle in almost the same manner as when using an oxy-acetylene torch.A stream of inert gas, such as argon or helium, flows out around the electrode and envelopes the arc thereby preventing the formation of oxides in the molten puddle. [Figure 5-7] 90077 90077 Figure 5-7. Tungsten inert gas (TIG) welding process. 90005 90002 The versatility of a TIG welder is increased by the choice of the power supply being used. DC of either polarity or AC may be used. [Figure 5-8] 90005 90010 90011 Either select the welder setting to DC straight polarity (the work being the positive and the torch being negative) when welding mild steel, stainless steel, and titanium; or 90012 90011 Select AC for welding aluminum and magnesium.90012 90027 90088 90088 Figure 5-8. Typical setup for TIG welding. [Click image to enlarge] Figure 5-9 is a typical power source for TIG welding along with a torch, foot operated current control, regulator for inert gas, and assorted power cables. 90090 90090 Figure 5-9. TIG welder-gas tungsten arc welder (GTAW). 90002 90003 Electric Resistance Welding 90004 90005 90002 Electric resistance welding, either spot welding or seam welding, is typically used to join thin sheet metal components during the manufacturing process.90005 90002 90043 Spot Welding 90044 90005 90002 Two copper electrodes are held in the jaws of the spot welding machine, and the material to be welded is clamped between them. Pressure is applied to hold the electrodes tightly together and electrical current flows through the electrodes and the material. The resistance of the material being welded is so much higher than that of the copper electrodes that enough heat is generated to melt the metal. The pressure on the electrodes forces the molten spots in the two pieces of metal to unite, and this pressure is held after the current stops flowing long enough for the metal to solidify.The amount of current, pressure, and dwell time are all carefully controlled and matched to the type of material and the thickness to produce the correct spot welds. [Figure 5-10] 90103 90103 Figure 5-10. Spot welding thin sheet metal. 90005 90002 90043 Seam Welding 90044 90005 90002 Rather than having to release the electrodes and move the material to form a series of spot welds, a seam-welding machine is used to manufacture fuel tanks and other components where a continuous weld is needed.Two copper wheels replace the bar-shaped electrodes. The metal to be welded is moved between them, and electric pulses create spots of molten metal that overlap to form the continuous seam. 90005 90002 90003 Plasma Arc Welding (PAW) 90004 90005 90002 Plasma arc welding (PAW) was developed in 1 964 as a method of bringing better control to the arc welding process. PAW provides an advanced level of control and accuracy using automated equipment to produce high quality welds in miniature and precision applications.Furthermore, PAW is equally suited to manual operation and can be performed by a person using skills similar to those for GTAW. 90005 90002 In the plasma welding torch, a nonconsumable tungsten electrode is located within a fine-bore copper nozzle. A pilot arc is initiated between the torch electrode and nozzle tip. This arc is then transferred to the metal being welded. [Figure 5-11] 90119 90119 Figure 5-11. The plasma welding process. 90005 90002 By forcing the plasma gas and arc through a constricted orifice, the torch delivers a high concentration of heat to a small area.The plasma process produces exceptionally high quality welds. [Figure 5-12.] 90123 90123 Figure 5-12. Plasma arc. 90005 90002 Plasma gas is normally argon. The torch also uses a secondary gas, such as argon / helium or argon / nitrogen, that assists in shielding the molten weld puddle and minimizing oxidation of the weld. 90005 90002 Like GTAW, the PAW process can be used to weld most commercial metals, and it can be used for a wide variety of metal thicknesses. On thin material, from foil to 1/8-inch, the process is desirable because of the low heat input.The process provides relatively constant heat input because arc length variations are not very critical. On material thicknesses greater than 1/8-inch, and using automated equipment, a keyhole technique is often used to produce full penetration single-path welds. In the keyhole technique, the plasma completely penetrates the work piece. The molten weld metal flows to the rear of the keyhole and solidifies as the torch moves on. The high quality welds produced are characterized by deep, narrow penetration and a small weld face.90005 90002 When PAW is performed manually, the process requires a high degree of welding skills similar to that required for GTAW. However, the equipment is more complex and requires a high degree of knowledge to set up and use. The equipment required for PAW includes a welding machine, a special plasma arc control system, the plasma welding torch (water-cooled), the source of plasma and shielding gas, and filler material, when required. Because of the cost associated with this equipment, this process is very limited outside of manufacturing facilities.90005 90002 90003 Plasma Arc Cutting 90004 90005 90002 When a plasma cutting torch is used, the gas is usually compressed air. The plasma cutting machine works by constricting an electrical arc in a nozzle and forcing the ionized gas through it. This heats the gas that melts the metal which is blown away by the air pressure. By increasing air pressure and intensifying the arc with higher voltages, the cutter is capable of blasting through thicker metals and blowing away the dross with minimal cleanup.90005 90002 Plasma arc systems can cut all electrically conductive metals, including aluminum and stainless steel. These two metals can not be cut by oxy-fuel cutting systems because they have an oxide layer that prevents oxidation from occurring. Plasma cutting works well on thin metals and can successfully cut brass and copper in excess of two inches thick. 90005 90002 Plasma cutting machines can rapidly and precisely cut through, gouge, or pierce any electrically conductive metal without preheating.The plasma cutter produces a precise kerf (cut) width and a small heat-affected zone (HAZ) that prevents warping and damage. 90005 90142 Flight Mechanic Recommends 90143.90000 Types of Welding | Arc Welding, Stud Welding, Resistance Welding Guide 90001 90002 There are many 90003 types of welding 90004 we use to join metals together, some modern and some ancient in their creation. From forge welding with hammers in the Middle Ages, to the discovery of carbon arc welding in the 1800s, up to today’s more contemporary types of welding, such as arc welding, resistance welding, solid state welding, and stud welding, there have been many advances in the field. 90005 90006 Welding Types 90007 90002 Read on to find out more about the many types of welding and how they differ in functionality and applications in our introductory guide: 90005 90010 Arc Welding 90011 90002 90013 90005 90002 Arc welding is one of the most prominent types of welding.Arc processes involve using the concentrated heat of an electric arc to join metal materials together. These processes fall broadly into two categories: consumable electrode methods and non-consumable electrode methods. This distinction dictates whether the process involves the electrode melting and becoming part of the welded joint or not melting and only acting as an arc conductor. 90005 90002 Another arc welding variable is the use of current; some methods require a specific type of current, whereas others are more versatile.Furthermore, some arc welding processes require shielding gas, whereas others do not. Find out more about some of the most prominent arc types of welding: 90005 90019 90003 Shielded Metal Arc Welding (Stick Welding) 90004 90022 90002 Developed during the 1950s, Shielded Metal Arc Welding (informally known as Stick Welding) uses a flux-coated consumable electrode with an AC or DC power source to create an electric arc between the electrode and workpiece materials. The arc melts the workpiece and electrode into a molten pool that forms a joint when it cools.This type of welding is also referred to Flux Shielded Arc Welding due to the electrode’s flux coating disintegrating into a shielding gas during heating. 90005 90019 90003 Gas Metal Arc Welding (MIG Welding) 90004 90022 90002 Gas Metal Arc Welding also creates an electric arc but between a consumable wire electrode and the workpiece materials. A welding gun feeds through the electrode and a shielding gas to protect against contaminants. As a result, the workpiece melts and materials join. The subtypes of gas metal arc welding are MIG welding (metal inert gas) and MAG welding (metal active gas).The process was originally developed for non-ferrous metals, such as aluminium, but eventually became the most common process for a range of materials including steel. 90005 90002 90032 Flux-cored Arc Welding 90033 is a similar process to MIG welding but tends to use a flux-filled hollow electrode wire instead of shielding gas. 90005 90019 90003 Gas Tungsten Arc Welding (TIG Welding) 90004 90022 90002 This welding process is commonly known as TIG welding (TIG standing for tungsten inert gas).Gas Tungsten Arc Welding requires a non-consumable tungsten electrode, a constant current power source, and an inert shielding gas to create a plasma arc (which consists of metal vapors and highly ionized gas). This process allows for more operator control than Stick or MIG welding, making it suited to welding thin sections of stainless steel and non-ferrous metals. As a downside, it is also a slower and more technically demanding procedure. 90005 90002 90032 Plasma arc welding 90033 is a related type of welding, but in this case the plasma arc is separated from the shielding gas through placement within the welding torch body, exiting at a higher velocity via a copper nozzle.90005 90019 90003 Submerged Arc Welding 90004 90022 90002 Submerged Arc Welding creates the electric arc beneath a bed of flux powder, which provides shielding gases and slag as well as alloying elements for the molten pool. The flux layer drastically reduces heat loss and works as an automated or semi-automated process. A hopper recycles the excess flux and slag layers are removed after welding. 90005 90019 90003 Electroslag Welding 90004 90022 90002 In this process, a wire is fed into the welding area and flux is added to the electrical arc until the molten slag reaches the tip of the electrode and extinguishes the arc.Electroslag welding operators use a DC power source and tend to work with thick workpiece materials, such as low carbon steel plates and aluminium busbars. 90032 Electrogas welding 90033 is a similar process to electroslag welding, but the arc remains throughout the procedure. 90005 90019 90003 Atomic Hydrogen Welding 90004 90022 90002 Developed in 1926 by Irving Langmuir, atomic hydrogen welding (also known as arc-atom welding) creates an arc between two tungsten electrodes with hydrogen as a shielding gas.The resulting arc maintains itself independently from the workpiece. Though rarely used for most applications today, as MIG welding has become the preferred process, atomic hydrogen welding has proven invaluable for the welding of lifting chains. 90005 90019 90003 Carbon Arc Welding 90004 90022 90002 Arc types of welding began with the carbon arc welding process, which was patented in 1881. In this method, an electrical arc forms between a carbon electrode and the workpiece. Twin-carbon arc welding refers to creating an arc between two carbon electrodes.The process produces significant heat and a very bright light, whereas more modern techniques are much safer and more convenient for welders. 90005 90010 Resistance Welding 90011 90002 90074 90005 90002 Resistance welding processes involve applying force upon and conducting a current through metal workpieces to heat up and melt them in areas predetermined by the electrodes and / or workpieces. Prominent resistance types of welding include: 90005 90019 90003 Spot Welding 90004 90022 90002 Welders use spot welding for joining overlapping sheet metals in projects where strength and durability are not pressing concerns.Copper electrodes hold the workpieces together with force and an electrical current heats them to welding temperature. This process is more cost-effective than most arc welding methods. However, it has fewer applications and tends to harden and warp workpiece materials. We cover the differences between spot welding and stud welding in this guide. 90005 90019 90003 Projection Welding 90004 90022 90002 As a modification of spot welding, projection welding involves locally heating and welding the raised sections (projections) on one or more the workpieces.90005 90019 90003 Butt Welding 90004 90022 90002 Butt welding joins together thick metal bars or plates by clamping electrodes to the workpieces and applying opposing forces. Heating occurs but often no melting, creating a solid-state weld. 90005 90019 90003 Seam Welding 90004 90022 90002 This type of resistance welding joins sheet metals at seam joints by applying opposing forces with electrode wheels. The rotary wheels work to localise the current and heat generated. 90005 90019 90003 Flash Welding 90004 90022 90002 In flash welding, the workpiece materials are placed at a predetermined distance from one another and current is applied, creating resistance in the gap between the materials and an arc for melting.Once the correct temperature is reached, the two pieces are pressed and forged together. 90005 90010 Oxyacetylene Welding 90011 90002 90111 90005 90002 Also known as oxy-fuel welding, oxy welding, and gas welding in the United States. Oxyacetylene torch welding uses fuel gases and pure oxygen to increase flame temperature for the local melting of the workpiece. Engineers Edmond Fouché and Charles Picard developed the oxyacetylene welding method in 1903 and it has since become largely obsolete due to arc welding processes.However, this process is still popular for artwork applications and home use. 90005 90010 Solid State Welding 90011 90002 90118 90005 90002 Solid state welding is characterised by the use of temperatures below the melting points of the base materials. Unlike resistance welding, it does not always require pressure. Depending on the process used, solid state welding can take anything from milliseconds to hours. There are many types of solid state welding, including: 90005 90122 90123 90003 Forge Welding 90004: low carbon steel parts are heated and hammered together.90126 90123 90003 Cold Welding 90004: high pressure at room temperature coalesces very clean metals. 90126 90123 90003 Hot Pressure Welding 90004: heat and pressure macro-deform the base material. 90126 90123 90003 Roll Welding 90004: rolls induce heat and pressure deformation (instead of hammers). 90126 90123 90003 Friction Welding 90004: a mechanical sliding motion rubs the materials together. 90126 90123 90003 Ultrasonic Welding 90004: a transducer emits high-frequency vibrations to join materials together.90126 90123 90003 Magnetic Pulse Welding 90004: magnetic forces weld the workpieces together. 90126 90123 90003 Explosion Welding 90004: a controlled detonation joins together rapidly moving parts. 90126 90123 90003 Diffusion Welding 90004: joining refractory metals without affecting their metallurgical properties. 90126 90159 90010 Electron Beam Welding 90011 90002 90163 90005 90002 Electron beam welding uses a beam of high-velocity electrons in vacuum conditions to create powerful welds.The electrons transform from kinetic energy to heat when they hit the workpiece materials, melting them together. 90005 90019 90003 Laser Beam Welding 90004 90022 90002 The laser beam welding process uses a highly concentrated laser heat source for narrow and deep welds. Welders can use a continuous or pulsed laser beam, the former for deep welds and the latter for thin materials. 90005 90010 Stud Welding 90011 90002 90176 90005 90002 Stud welding is a specialised and highly effective method for joining studs and other fasteners to sheet metals.This type of welding avoids the pitfalls of many other stud joining processes, such as weakening the workpiece, studs working loose, cracking, and staining. Stud welding is rapid and creates strong welds without reverse marking or holes. Types of stud welding include: 90005 90019 90003 Capacitor Discharge Stud Welding 90004 90022 90002 Capacitors charge to a pre-set voltage depending on welding diameter. The stud makes contact with the sheet and then the capacitors trigger their energy to produce an arc and melt the pip.Return pressure forges the stud to the molten surface area of ​​the sheet for a complete fusion. CD stud welding is very cost-effective and ideal for thin workpiece materials. However, the sheet surface needs to be clean and flat. 90005 90019 90003 Drawn Arc Stud Welding 90004 90022 90002 The Drawn Arc process involves triggering a pilot arc while the stud lifts to a pre-set height. The arc melts the weld end of the stud to create a molten pool. Return pressure forges the stud into the pool and the accompanying ferrule shapes the fillet.DA stud welding is the best process for attaching studs to thicker parent materials of 0.7mm and above, as it achieves strong welds. It is costlier than CD and requires ferrules but tolerates uneven surfaces and imperfections. 90005 90019 90003 Short Cycle Stud Welding 90004 90022 90002 The Short Cycle process has similarities to both CD and DA stud welding. Like CD stud welding, short cycle stud welding does not require ferrules and can use the same studs; like DA stud welding, the SC method is more tolerant of uneven and dirty surfaces.However, it achieves deeper welds than CD and costs less than DA. 90005 90002 Taylor Studwelding is a leading manufacturer and supplier of stud welding machines that are capable of the CD, DA, and SC types of welding processes. We have extensively tested all our equipment to ensure the strongest and most effective welds on a variety of metals. For more information browse our machines online, read our ultimate stud welding guide, or get in touch with us to find out what stud welding can do for you.90005.90000 Welding Transformers Types Mainstays Products Igbt Machines For Welding 90001 90002 90003 90004 90002 90006 welding transformers types mainstays products IGBT machines for welding 90007 90004 90002 * We are welding machine manufacturer, so we can offer better price and after-sale service and shorter delivery date. 90004 90002 * Our company is in huizhou city, guangdong province. 90004 90002 90004 90002 90004 90002 90004 90002 90006 Model: MMA120 / 158/168/160/200/250/300/320 IGBT / 400 IGBT / 500 IGBT 90007 90004 90002 90006 90007 90004 90002 90006 90007 90004 90002 90006 Features: 90007 90004 90002 1, Adopting IGBT inverter technology.90004 90002 2, Easy arc ignition, little spatter. 90004 90002 3, Small welding distortion, forming good. 90004 90002 4, Good current thrust function. 90004 90002 5, Good arc performance, strong antijamming capability. 90004 90002 6, Automatic compensation function with voltage fluctuation. 90004 90002 7, Suitable for all kinds of acid and alkaline welding rod, the diameter of welding rod is between 1 ~ 8mm, can work continuously and efficiently. 90004 90002 90004 90002 90004 90002 90006 Main Technical specifications 90007 90004 90057 90058 90059 90060 MODEL / ITEM 90061 90060 MMA500 IGBT 90061 90064 90059 90060 Rated input voltage (V) 90061 90060 AC380V ± 15%, 3ph 50 / 60Hz 90061 90064 90059 90060 Rated Input Power (KVA) 90061 90060 25 90061 90064 90059 90060 Rated output 90061 90060 500A / 40V 90061 90064 90059 90060 Range of welding current regulation (A) 90061 90060 40-500A 90061 90064 90059 90060 No-load voltage (V) 90061 90060 67 90061 90064 90059 90060 Duty cycle 90061 90060 60% 90061 90064 90059 90060 Efficiency (%) 90061 90060 85 90061 90064 90059 90060 Power factor 90061 90060 0.85 90061 90064 90059 90060 Outer covering protection rank 90061 90060 IP23 90061 90064 90059 90060 Insulation grade 90061 90060 F 90061 90064 90059 90060 Outlook size (mm) 90061 90060 530 × 360 × 585 90061 90064 90059 90060 Weight (KG) 90061 90060 30 90061 90064 90059 90060 Thrust adjustment range (mm) 90061 90060 0-100 90061 90064 90059 90060 Rod diameter (mm) 90061 90060 1.6-6.0 90061 90064 90149 90150 90002 90004 90002 90004 90002 90006 Standard Configuration 90007 90004 90002 2pcs of KP70-90 fast plug 90004 90002 90006 Options 90007 90164 Electrode holders, Welding cable, Earth clamp, Protective mask 90004 90002 90004 90002 90006 PLS NOTE: 90007 90004 90002 The LIFE SPAN of our welding machine lasts between FIVE and SIX years.90004 90002 If there were problems in seven days, we replace the new one for you. 90004 90002 90004 90002 90006 WARRANTY SYSTEM: 90007 90004 90002 We provide a free ONE YEAR WARRANTY for this item. 90004 90002 90004 90002 90004 90002 90004 .