Archive for June, 2010

USES OF TIG WELDING TUNGSTEN ELECTRODES

Wednesday, June 30th, 2010

An electrode is used to make some contact with metals and used as consumables in welding process. Tungsten is a metal which is found naturally and used in many high temperature applications. Because of its hardness and density it is widely used in welding process. Thoriated tungsten electrodes are mostly used in tig welding process. Thorium which is abundantly found and less cost is used to improve the melting temperature and improve arc stability in tig welding process. The uses of thoriated tungsten electrodes are

• It make good welds and quite easy to use
• It operates well below its melting temperature
• Low rate of consumption of electrode
• It reduces the weld metal contamination and initiate the arc easily
• It has high current carrying capacity and sharpen the electrodes
• It has long life with high quality and suitable for all steels.

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VARIATION BETWEEN MIG AND TIG WELDING

Tuesday, June 29th, 2010

MIG WELDING
• Gas metal arc welding is also known as mig welding
• It is of consumable electrodes method
• It uses wire electrodes
• It is used to weld aluminum and other non ferrous metals
• This welding came into existence in 1948
• It has high quality versatility and speed
• Mig welding uses constant voltage power supply
Mig welding is the simple welding process, where the learners can learn quickly
• It is used in industries like aircraft and automobiles

TIG WELDING

• Gas tungsten arc welding is called as tig welding
• It is of non consumable electrodes method
• It uses tungsten electrodes
Tig welding is used to weld stainless steels and non ferrous metals
• It came into existence in 1941
• It uses tungsten electrodes which is used in high temperature applications
• Tig uses constant current power supply
Tig welding is somewhat complex and takes some time to learn
• It is used in chemical and instrument industries

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MIG welding wire types

Monday, June 28th, 2010

In 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.

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Where are stick welding used for?

Friday, June 25th, 2010

Welding 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.

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What are mig welders utilized for?

Thursday, June 24th, 2010

Welding 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.

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What welding helmet used for?

Wednesday, June 23rd, 2010

Welding helmet is very important and necessary while welding metals. You should weld the metals without a helmet. 50 % of workers are injured for not wearing welding helmet. The helmets are worn because while weld a spark and other lights are thrown out. The role of this helmet is to protect your face and of course eyes. It is important to protect your eyes because once your retina is damaged you can become blind.

Have your helmet and other gears in an approachable distance. These helmets are vulnerable which protects from rays and doesn’t cause any damages on it. The welding helmet consists of lens shade which protects the eyes. The lens is made out of electronic shutter which adjust automatically while welding. They are generally used while working with all the arc metal welding equipment. When you buy the helmet make sure they are light weighted helmet. Heavy helmet can be tiring to wear and these can strains your neck. There are many kinds of helmet but buy a quality helmet which last for longer period.

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What is diesel generators used for?

Tuesday, June 22nd, 2010

The diesel generator is a combination of electrical generator and diesel engine invented by Faraday and Rudolph respectively. This produces electricity with the help of diesel engine and alternator. These are generally used when there is no power. These are used where the electric power supply is very less or no power supply. For example the power supplied to ships or cruises are from these generators. Not only ship but there are many building and offices that use this kind of electric supply.

Advantages of diesel generators:

• The maintenance and repair work charges less.
• It can produce flow of electricity to your building continuously.
• The rate of diesel is cheaper than other fuels.
• The performance and stability of this generator is really very high.

Disadvantages of diesel generators:

• These can produce lot of noise pollution which is not healthy for environment.
• It takes long time to start in cold climate days.
• These also cause air pollution. They emit dangerous and harmful gas in the air.

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What are the safeguards for welding?

Monday, June 21st, 2010

Welding 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.

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Welding the back bone of industries

Friday, June 18th, 2010

Welding is the important process in manufacturing of metals and steels. Welder is a man who does the welding process. Welding tools and welding equipments are essential in welding services. Different types of weldings are there, the simplest welding process is arc welding which is easily and readily available. Tig welding is one of the best welding techniques which make use of tungsten electrode. Arc welders and tig welders always have work. Similarly many types of weldings are there such as spot, mig; wire feed welders etc. Welding equipments make the work easier to welders. Plasma cutter is the equipment which is preferred by all industries. The welder needs some welding accessories such as welding torch, welding gloves, welding helmets and welding gun to perform his welding work and to protect him from welding fumes. Welding equipments need some welding consumables such as tungsten tig mig and plasma cutter consumables to support the welding tools. Welding industries need proper welding tools to run an industry successfully.

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Plasma cutters the child of modern invention

Thursday, June 17th, 2010

Plasma cutter is one of the modern inventions in welding equipments. Plasma arc process has its origin 50 years ago its properties are it can ionize the materials and uses the inert gas to protect weld from oxidation; it works by sending an electric arc through a gas. Plasma cutting machines exists in different sizes and it is also called as a shape cutting machine. These plasma cutters used to cut different types of metals in different shapes. cnc plasma cutter is used to cut artistic metal shapes and parts. Plasma cutter uses consumables such as arc tig and mig welders. Plasma cutter has a special feature of torch operation in it. Plasma cutters are cheap and portable. Air plasma cutting has the special feature of cutting ferrous and non ferrous metals with no heat effect and no adjustments of oxygen or time required. Many types of plasma cutters are there and an online shop offers best plasma cutters with affordable prize.

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