Welding is a sculptural process where it deals with raw items such as metal and pipes and it is a process where welders deal with welding fumes and heat. From the decade, welding has developed a lot and new welding technologies with advanced welding equipment and welding systems have been developed. When you consider the history, there were no welding schools at that time, but today you can see lots of welding schools and modern welding products with advanced welding tools have been introduced. Manufacturing process needs welding and it fails if the welding industry is not developed and equipped well with proper welding products. For the welding industry to run successfully the industrialist needs proper welding accessories with appropriate welding safety and welding gears. Plasma cutter has made the strong foundation in welding industry and plasma cutter machine is also used for the process of plasma gouging process. It is a process that is used to remove the welded materials and also it find cracks, porosities in welding materials.
Posts Tagged ‘arc welding’
A brief insight into welding
Thursday, August 26th, 2010
Brief insight into hot air welder
Tuesday, August 24th, 2010Hot air welder otherwise known as the hot gas welder is a kind of plastic welding technique which is almost similar to gas welding metals. However the specific technique is different in both the welding method. A hot air welder, which is a specially designed heat gun, produces a jet of hot air that softens both the parts to be joined and a plastic filler rod. It is important to note that all of the things to be welded must be of the same or a very similar plastic. However welding PVC to acrylic is an exception to this rule. For manufacturing smaller items like chemical tanks, water tanks, heat exchangers and plumbing fittings, the hot air welder is the most common fabrication technique being used.
If the welder is used to weld case of webs and films, a filler rod may not be used. Here two sheets of plastic would be heated using a hot gas or a heating element and then rolled together. This process is comparatively fast and can be accomplished continuously. There is another variation in the hot sir welding technique. It is called the freehand welding in which the jet of hot air from the welder is played on the weld area and the tip of the weld rod simultaneously. The rod is pushed into the joint and fuses to the parts as it softens. This process is slower compared to others. But the welding is versatile and can be used in almost any situation.
Different types of welding:
Thursday, August 19th, 2010Welding is nothing but a process of joining two metals. Welding can be done through gas flame, electric arc or laser.
MIG (Metal Inert Gas) welding is an automatic or semi automatic process where wire is connected to a source of direct current acts as an electrode joins two pieces of metal as it passes continuously through a welding gun. One major advantage is that metal can weld quickly than traditional welding. Other advantages are – since shielding gas protects the welding arc, MIG welding produces a clean weld with very little splatter. MIG welding can be used with a wide variety of metals and alloys.
Tungsten inert gas (TIG) welding is the process of blending together reactive metals such as magnesium and aluminum. TIG welding is commonly used for both high quality and manual welding. There are different types of joint used with TIG welding like butt joint, lap joint, corner joint and t-joint.
Steps in setting up welding equipment
Thursday, July 29th, 2010Learning to set up welding equipment properly is the first step in arc welding. For ensuring safety, it would be better if you understand your equipment as well as the functions very thoroughly. This would also help you to produce a better product. To begin with the set up, you need to check all cables for damage and replace if necessary before starting any new welding project. This is to make the welding devoid of nicks or frays in the welding as it may lead to pose an electrical hazard.
Depending upon the type of welder you are using, plug your power source into the appropriate electrical outlet. The power provided from the arc welding source would be either an alternating current (AC) or a direct current (DC) using either a positive or negative electrode. The factor that determines the type of job would be the current and polarity that you choose.
The third step is to connect the electrode lead from the welder to the insulated electrode holder. Once you have connected the electrode, you need to place the proper electrode in the electrode clamp. As you guide it along the weld joint, an electrical arc would be formed between the base metal and the electrode. For completing the circuit, you have to run the work lead from the welder to the base metal. This can be done by attaching the ground clamp to the piece of metal you are working on as close to the weld as possible.
SAFETY MEASURES FOR PLASMA CUTTING
Thursday, July 1st, 2010• Do not touch any wet surface when operating the plasma cutter equipment
• Don’t use plasma cutters without any proper protection
• Wear ear muff when operating plasma cutting system, since it generates high noise levels
• Do not touch the body or object when the system is operating
• Don’t remove the ground cable which is attached with the work object
• Ensure that there is proper earth, since it connects with high electric circuit
• Wear proper protective clothing’s such as welding helmet and gloves
• Make sure that you are working in a well ventilated area
• If you are a heart patient and having pace maker, then consult your physician before you going for work
• Do not make any body contact with plasma arc cutting system
Plasma arc cutting is an easy process if you follow these safety precautions
MIG welding wire types
Monday, June 28th, 2010In metal fabrication and production, the MIG welder is commonly used owing to its versatility and efficiency. To control the amount of filler metal added to the weld puddle, the MIG welder uses welding wire fed from a spool. Diameter, alloy and type are used to categorize the MIG wire.
It is necessary that the alloy of the MIG wire must match the base metal being used. This would ensure that a strong weld would not crack or weaken when cooled. As a wide variety of alloys are available for MIG welders, welder would have the option to weld carbon steel, stainless steel and aluminum. A MIG welding wore would have the name of the alloy, diameter and type of the wire marked on a label. The label would be visible while attached to the welding machine as it is located on the side of the wire spool. Even though the wire type would be marked on the label, each manufacturer has a different way of making wire type. The two distinct type of MIG welding wire are the solid core and the flux core. Solid core MIG wire is a solid strand of the chosen alloy while the flux core MIG welding wire has a flux paste inner core would be surrounded by the filler metal.
Where are stick welding used for?
Friday, June 25th, 2010Welding makes the work easy and many people relay on this for welding. The process of using covered electrode is known as stick welding. It is other wise known as Shielded Metal Arc Welding (SMAW). This is more commonly used by the people than other arc welding. That’s because these are flexible and also versatile. These are known as versatile because they can weld metals together very fast. These are easy for welding once you practice for it. These are generally used for small repair work around the house of individuals.
The merit of this welding equipment is that these are inexpensive than other welders. These are very smooth and comfortable to use and are also portable for welding. The flux in most of the welding equipment needs regular regulating. But these don’t need regulating because here the electrode does this work. These are very less susceptible from any kind of wind and drafts. These can be welded from any angle or position for welding metals.
What are mig welders utilized for?
Thursday, June 24th, 2010Welding a metal is a very tough work but due to advancement in technologies the work of welding has become very easy. One of the important welders used for welding is Mig welder. This welding is a semi automatic arc welding where continuous electrode and shielding gas is feed. This melts the metal faster than other welding equipment. This tends to melt the soft metal like aluminum easily. These are capable of welding all kinds of metal.
The work of this welding is much faster and it also saves times. The process of this weld is very neat and produces less splatter. These are capable and used by the farmers, construction field and the automobile area. The merit of this weld is they are inexpensive and long performance. The three property of this welding equipment are gas, voltage and speed of feed. All the three things are to be set properly other wise the welded metal won’t have good finish. The metals are welded in one time and it doesn’t need to change the rods.
What are the safeguards for welding?
Monday, June 21st, 2010Welding is a process of merging two or more metals by electrode. These are generally practiced and utilized by the construction people and metal fabricators. The metals are melted with welding machines while joining the two metals. With some of the welding machines the metals cools - off easily and the metals are bonded. Some of the commonly welding machines used are MIG welders, TIG welders, plasma cutter, arc welders, spot welders and aluminum welders.
There are some precautions which are necessary to be taken while working with welding machines. Firstly while working with welding machines you need a welding helmet. This serves as a protection for face and eyes. That’s because while cutting metals few sparks are thrown out. These are very dangerous and can damage your retina if you don’t protect your eyes. Even gloves are important for protecting your hands. That is some of the welding machines use high voltage which can cause shock or death if aren’t wearing protective gloves.
Tungsten electrodes the friend of metals
Wednesday, June 16th, 2010Tungsten electrodes are the non consumable welding electrodes suitable for tig welding process. Tungsten electrodes are used in tungsten arc welding process. Tungsten electrode is used to weld stainless steel and non ferrous metals and it is called as a steel electrode. Tig welding gives higher quality welds than arc welding because of its greater control over temperature. Tungsten metal retains its high temperature and high melting point. Tungsten electrodes has a tungsten rod where is surface is chemically cleaned to remove oxides and lubricants. The copper tungsten electrodes is composition of both copper and tungsten has excellent heat resistant and electrical conductivity. Tungsten arc welding is also known as tungsten inert gas welding because it uses inert gas to prevent contamination of tungsten.
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