Posts Tagged ‘arc welding’

Power supply essential for Arc Welding:

Monday, December 20th, 2010

Arc welding is one among the universally known procedures. It has got the name as “Arc Welding” because of the electrical arch that is created once the welding process is completed. The arc is the result of high temperature to the electrodes and the +ve & -ve charges that are produced from the heat. All ions are excited in a whirl at hasty pace that facilitates to produce the electrical arc or the beam, which often comes from the torch.

Now let us see how it is the best power source. This is the core of every arc welding process because it’s the welding power supply source. In general, the power source has the alternating current (AC) that will rotate in its direction. Consequently the alternating current will move forward with its energy after that it reverses and maintains this irregular system right through the entire work.

On the other hand when it has direct current or DC, supply will persist to flow frontward and continue in the similar way until the work is done. The entire process is relied on the kind of electrodes you employ and the nature of supply material used.

Share

Know More about Electric Arc Welding:

Tuesday, December 14th, 2010

A low electrical energy, high amp power source is basically an electric arch welder, which has a wire linked to the hand piece and a different wire bond to the project itself. The hand piece clutches an electrode which produces a high temperature arch by the side of the electrode tip at the time while struck adjacent to the work.

It requires an adequate temperature to dissolve the tip of the electrode that pushes into the bond joint making a blob as it cools down. A fluctuation is important and the temperature makes the flux to create a gas defend the region of the weld area.

At the time when electrode is applied, the worker adjusts the location of the hand piece for both to track the joint and to maintain a continuous arch gap. Modifications on the welder itself provide options for the operator to utilize a range of fusing rods relying on the environment and symphony of the bond that is essential. Most often electric arch welders are movable tools allowing the connection to be brought out in the field as required. This is utilized for farm functions, pipelines, mining and other outside conditions.

Share

Working Process of Arc Welding:

Wednesday, December 8th, 2010

Arc welding process is a process which consists of characteristics which is recognized for producing an electrical arc as it melts the metal. This kind of welding procedure has given its name as arc welding.

While performing the process of arc weld certain equipments will be required so that a welder is able to create an arc. In order to form arcs make sure that you have a supply of electricity. You can have an alternate supply of current (AC) or (DC) direct current power flowing from the electric supply unit. Such power is brought down to source material with the help of a torch.

Torch holds electrode which can be in form of consumable or non consumable. If the electrode is consumable, it will break easily when the heat from the power supply runs into it and at the same time as it heats up the material.

Electrode in arc welding will produce a light that will sparkle as it heats the source metal. Such electrode is known to be as a medium, this medium is fabricated by a material similar to the base material. At times this electrode is enclosed with flux. Flux is termed to be as a cleaning agent, its main purpose is to tidy up the source material while it is being welded.

Share

Arc welding safety:

Friday, November 12th, 2010

Arc welding can weld thick metals. While welding arc it is important that you wear auto darkening helmets. If you don’t wear welding helmet you can damage your eyes from UV rays. There can be lot of sparks and spatter flying around especially when learning to arc weld. Welding area should be cleared from inflammable materials. Always keep a fire extinguisher nearby. DC arc welders run at about 80V which can result in electric shock. AC arc welders set to 80V will have a peak current near 120V, so the risk and potential danger of a shock is higher. Don’t look closely at the weld while it cools, as the weld contracts tiny hot pieces of slag can ping off and burn themselves into your eyes. This is especially true of stainless rods.

Share

A Note on ARC WELDER:

Tuesday, October 12th, 2010

The process of arc welding will make use of electrical current so as to link an electrode and the welding object. This is done so as to melt the metal and generate the weld. The area which is going to be welded at times will be protected with the help of semi-insert gas or filler material.

The method of arc welding is widely used since it is less expensive. Apart from this it is first type of welding that most of the beginners learn.

Welders who perform this task of welding are known to be as arc welder(s). While preparing for a weld, make sure that you carry on this activity at outdoors. Furthermore, check the area of weld ensuring that there are no flammable articles lying nearby.

Arc welders have to protect themselves at the time of performing weld. Make use of protective equipments that are available in market which are specifically designed for such welding activities. Wearing of helmet is very important, if not it will lead to permanent eye damage.

If you are performing this kind of weld for the first time then it is wise to conduct this process under the supervision of skilled and knowledge able arc welders.

Share

How to choose an Arc Welder:

Thursday, September 23rd, 2010

For arc welding, a welder should choose the right welding equipments. Choose one based on your needs, has right features and comes in your budget. If you choose right arc welding equipment you can complete all your jobs properly and on time. Below are certain points that can help you in buying the right equipment.

• For outdoor projects, buy flux core type of welding equipment. It’s portable and protects cooling metal even in stronger winds.

• Use gas metal welder for indoor work. It produces less splatter.

• When you’re buying a arc welder, make sure it has a seal of approval either from National Electric Manufacturers association or underwriters laboratory.

Design Features:

• It is important to find out the thickness of metal before welding. A 90 amp welder can weld a metal which has 2.0mm thickness. For a very thin metal, a 25 amp welder would be best.

• Always buy a welding equipment that has correct amperage for the metal.

• Always select a welder that has trigger.

Share

Methods of Arc Welding:

Monday, September 13th, 2010

Submerged arc welding:

Welding power required for this process is AC or DC. Welding current ranges from 250 amps for 2.4 mm wire to 2000 amps for 9.5 mm wire. Welding is in flat and horizontal positions only. If you want to weld one inch plate, single V weld the electrode diameter is 5/16 inch, the speed is 10 inches per minute.

Gas metal arc welding:

Welding power sources is either DC or AC. Normal electrodes that are used is up to 1/8 inch diameter. Normal amps required are from 50 to 225. For Carbon steel inch thick, number of passes required is 2. Protection from wind is required.

Shielded metal arc welding:

You can use AC or DC power source. This method is used for mild and alloy steel and stainless steel. Arc voltages ranges from 20 to 40. Current ranges from 20 to 500 amps.

Share

Getting a Tradition Welding Helmet

Friday, September 10th, 2010

In the same way that people love to personalize their cars and clothes by getting them custom-built, welding helmets can likewise be modified. Even though there are many types of designs and features offered by both standard and auto darkening helmets, you can still get your own tradition welding helmet at a reasonable price.

When you are getting one, it is significant to be familiar with what specific features you would like your welding helmet to have. There are quite a few companies and suppliers that are willing to take on customers’ unique preferences and you can verify out internet websites too. Anyway, among the things people in common take into concern when getting a custom helmet is color, design style, size of the viewing region and shade. You will also have to prefer between the old standard helmet that is non-electronic and the one that’s in advance more popularity these days – auto darkening helmets.

Share

What are the different types of consumable electrodes?

Thursday, September 9th, 2010

Consumable electrodes are the metal electrodes that supply the filler for welding. Consumable arc welding electrodes melt as you use them, forming an alloy with the welded material. In contrast, non-consumable electrodes don’t melt during use, but instead require filler wire to melt into a welded seam. You will find consumable electrodes classified as bare, light, medium or heavily coated and tungsten electrode is the most widely used consumable. The heavier the coating, the higher-quality weld the electrode will produce.

Consumable electrodes with different coatings result in different welding characteristics and some coatings leave very little slag while others deposit a protective coating on the welding steam. Some types of consumable electrodes produce welds that cool quickly and work with metal such as cast iron and stainless steel specifically. Each welding type has its own welding consumables such as tig consumables, mig consumables and plasma cutter consumables. Consumable electrodes that come with specific coatings require some special handling such as preheating.

Share

How to select the best welding products

Wednesday, September 8th, 2010

Welding industries need all modernized welding products and welding accessories with latest welding technology. So while buying the welding product we need to follow some tips on buying it.

• Always look for a welding product that performs the entire task and a single welding machine that suits all welding process would be better.
• Whenever you buy welder you can prefer for used welder, reconditioned welder and cheap mig welders for the use, but look for its quality.
• The reconditioned welder differs from the used welder in the fact that it has been already inspected and made sure it is fine.
• Buy the inverter welding machine that has wire feed with extensive rolls and reduce the wiring needs. Also have a welding product like plasma cutter that performs both welding and cutting process.
Welding gears such as welding helmets and welding gloves should be bought with importance and weight of the helmet is another factor to consider. There should be a balance between comfort and durability.

Share