welding

The process of welding is characterized by the joining together of metal parts by superheating and fusing them until a permanent bond can be formed. The products on which welders work could include auto and aircraft parts, electrical circuit boards, brackets, panels, housings, jewelry parts, and many other things. Welders are needed in many business sectors, particularly in the manufacturing industry where they are prominently used in automobile manufacturing and repair, shipbuilding, bridge construction, and in dozens of other applications. To an increasing extent, the welding process is becoming more automated and dependent upon machines or robots to perform the actual welding tasks under the oversight of a skilled individual trained in both the welding process itself and also in the operation of the requisite machinery. Such an individual is known as a Welding Machine Operator.

welding electrode operators need to be able to set up the machine, load parts correctly, and continuously monitor the machine to make sure that it yields the desired bond. Operators may specialize in the operation of a particular type of machine. Those who do may have titles such as Resistance Welding Machine Operator, Arc Welding Machine Operator, or Gas Welding Machine Operator.

A welding rod operator starts a project by first reading blueprints or work orders to determine the specifications of the particular product or job. Based on these instructions, the operator then sets up the machine by adjusting attachments, setting controls, and computing other settings to be programmed into the machine. Before preparing the work piece, the operator adds solutions which will cool the work piece or cause the metal to bond more easily. Next, he/she will lay out or fit together the parts to be bonded and, if necessary, load or feed the work piece into the machine. Some operators control robots that do all of these things.

Pipeliner 200G provides 200 A dc at 60 percent duty cycle. It has 5 current ranges with overlap in each range for stick-pipe welding and arc welding processes where slope control is desired. It uses General Motors 3.0 liter, 4-cylinder, water-cooled, industrial gasoline engine with 46 hp at 1,600 rpm. Dc exciter supplies pure dc current to welding generator, and 100 RPM high-idle adjustment provides fine-tuning for performance on pipe.

The Lincoln Electric Company is pleased to introduce the welding electrode Pipeliner 200G-its newest gasoline industrial engine driven welder. This latest version of the widely known SA-200 design is intended especially for pipe welders and contractors who demand the best welding arc.

The Pipeliner 200G is a heavy duty, tough ARC welder. The basic design has been a standard in the industry for over 60 years for its long-life, reliable operation and great resale value. The Pipeliner 200G offers 200 amps DC at 60 percent duty cycle. It has five current ranges with overlap in each range for stick pipe welding and other arc welding processes, where slope control is desired. Also featured is a new 100-RPM high idle (OCV) adjustment, which provides additional fine-tuning for performance on pipe. A DC exciter supplies pure DC current to the welding generator as requested by the most discriminating operators. The Pipeliner 200G uses all copper windings,welding rod, which enhance arc stability for the best arc in the industry. In addition to its welding capabilities, the Pipeliner 200G provides 1,750 watts of DC auxiliary power at 115V. For grinding operations it delivers plenty of staying power under load.

Since MIG welders offer a good-quality weld with a moderately priced machine, coupled with high strength and high speed, why would you consider anything else? It really comes down to control, versatility, and the hardness of the weld bead.

TIG welding rod temperatures up to 35,000 degrees Fahrenheit, yet this concentrated heat can be precisely controlled and directed. When filler metal is required, it can be added manually by feeding welding rod into the puddle, similar to oxyacetylene welding. In fact, oxyacetylene welders usually pick up TIG welding fairly easily.

TIG welding involves a handheld torch that holds a slender electrode through which the welding current passes. The electrode is surrounded by a ceramic cup that directs the flow of an inert shielding gas (usually argon), which keeps atmospheric oxygen away from the weld zone. Most machines have a foot- or hand-operated control that changes the welding current on the fly. These features offer unrivaled control over all aspects of the welding process. A skilled operator can make a weld that has good penetration with a small, crisply defined, low-profile weld bead that is quite ductile, or workable. The workability of the weld is an enormous advantage for high-end bodywork, since the best way to repair the distortion caused by welding is to hammer on-dolly on the weld bead. MIG welds, while quite strong, are more brittle than TIG welds, and may crack if they are hammered too much.

TIG welding can bond just about any metal. Not only is it great for steel and aluminum, but it's also great for stainless, titanium, copper, bronze, and magnesium, to name just a few.

TIG welding has been around since the 1940s, and although welding electrode was considered esoteric at first, now that many people are aware of its advantages, the machines have become quite popular and affordable. Most of the better street rod shops (and many serious home builders) utilize TIG welding for both body and chassis work. Once you've become accustomed to the incredible control it offers and the beautiful look of a well-formed TIG weld bead, most people get hooked!

The type of TIG welder, TIG welding machine you should purchase depends on the type and thickness of metal you'll be welding. A TIG welder with a 180- or 200-amperage output and AC/DC output capabilities will handle most automotive applications. (You need both AC and DC output if you want to weld on steel and aluminum.) For bodywork, it's a real advantage to have a machine that will go down to very low settings-starting a weld around 5 or 10 amps is often beneficial. Some older machines only go down to 25 amps, and it's a bit tricky to do delicate welding on very thin metal with that much amperage.

A pulse type arc welding electrode with improved arc starting characteristics. An output voltage level sensor monitors the output voltage to determine whether the arc has been struck. If the arc has not been struck, a first oscillator gates a second, higher frequency oscillator so that the input to the driver is a chopped, pulsed, high duty cycle waveform. Also, the bandwidth of the output current level sensor is reduced so that the high value, short lived arc starting transient current does not cause the output current level sensor to improperly shut down the driver. Additional current limiting protection is provided during this period since the high chopping frequency causes the reactor to have a high impedance. After the arc has been struck, the output voltage will drop to the arc sustaining voltage and the output voltage level sensor will de-energize relay. The first oscillator then provides the driver with an input signal having the characteristics selected for the particular welding operation. Also, the bandwidth of the output current level sensor is restored to its full value.welding rod

A welding rod supply is a device that provides an electric current to perform welding. Welding usually requires high current (over 80 amperes) and it can need above 12,000 amps in spot welding. Low current can also be used; welding two razor blades together at 5 amps with tungsten inert gas welding is a good example. A welding power supply can be as simple as a car battery and as sophisticated as a modern machine based on silicon controlled rectifier technology with additional logic to assist in the welding process.

Welding machines are usually classified as constant current (CC) or constant voltage (CV); a constant current machine varies its output voltage to maintain a steady current while a constant voltage machine will fluctuate its output current to maintain a set voltage. Shielded metal arc welding will use a constant current source and gas metal arc welding and flux-cored arc welding typically use constant voltage sources but constant current is also possible with a voltage sensing wire feeder.

The nature of the CV welding electrode is required by gas metal arc welding and flux-cored arc welding because the ARC welder is not able to control the arc length manually. If a welder attempted to use a CV machine to weld with shielded metal arc welding the small fluctuations in the arc distance would cause wide fluctuations in the machine's output. With a CC machine the welder can count on a fixed number of amps reaching the material to be welded regardless of the arc distance but too much distance will cause poor welding. Check more information about ARC welding machine, ARC welder, TIG welding machine, TIG welder, MIG welding machine, MIG welder.