Posts Tagged ‘Stick Welders’

The SMAW process (part 2):

Wednesday, August 17th, 2011

The bare metal portion of the rod that is not coated is inserted into an electrode holder, sometimes called a “stinger”. The stinger holds the metal rod while welding and allows the weldor, (the person), to change the angle of the rod without having to change position or to reach around an object to weld.

The arc is struck by lightly tapping the electrode, (after inserting it into the stinger of course!), on the metal, or alternately flicking the electrode along the metal like a match. Of course, you must confine your arc striking to the immediate weld area or risk defects resulting in weld failure or rejection by an welding inspector, if you are required to submit your weld in a professional setting. As the arc is struck the electrode must be held slightly off the metal in most cases to maintain the arc and to deposit the filler metal into the weld, blending both pieces of base metal into the weld. While welding the welding rod is gradually consumed and deposited into the metal. The rod must be manually adjusted to keep the arc gap consistent. This means the rod is constantly fed closer to the puddle as it melts. It takes practice to manage this arc gap and to prevent contamination of the weld.

SMAW

SMAW

Even though Shielded Metal Arc Welding is largely a manual process it is a very sound and safe form of welding. It is also considered the most versatile and widely adapted form of welding, allowing extreme portability, while also allowing the weldor to competently weld virtually any thickness, even with smaller welders, given enough time and patience. If you’re thinking that stick welding may be what you are looking for, Everlast offers a full line of IGBT based inverter stick welders in our full line of PowerARC welders, from 140 amp to 400 amps that can manage the smallest homeowner chore to the largest industrial task. Inverters offer compact size with reduced power consumption over the heavy power hungry transformer Stick welders.

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The SMAW Process (part 1):

Tuesday, August 16th, 2011

We’ll start with our look at welding definitions by discussing one of the most common welding processes: SMAW. SMAW stands for Shielded Metal Arc Welding. It’s also commonly referred to as Stick welding, or generally as Arc welding. (This latter term can loosely apply to other forms of welding). Stick welders use a metal welding electrode as a filler material, to join the two pieces of metal together using an electric arc to heat and melt the metal into a puddle that gradually solidifies. Also called a welding rod, this metal cored electrode is usually some form of steel or stainless steel with a flux surrounding the electrode. The flux is a hard, coating that surrounds the rod down most of the length. While welding this flux serves several purposes.

SMAW

SMAW

1) To “shield” and protect the metal while welding, preventing oxygen from the atmosphere getting to the white hot metal and rapidly oxidizing the weld. An oxidized weld is weak and porous.

2) To help clean the metal and remove contaminants from the weld. As the flux interacts with the molten metal it helps to “float” out impurities. Flux components vary, while some welding rods have an iron powder base, others may have a cellulose base, all with trace amounts of other minerals or metals to form protective cocktail.

3) To provide a certain welding characteristic. Some electrodes due to their flux type weld more smoothly than others. Some because of their flux, cool more rapidly and penetrate more deeply. 

Welding electrodes are available in a variety of sizes, and purposes. After completing the weld and the weld has sufficiently cooled, the slag (consumed flux that lies on top of the weld) must be removed via chipping or a wire brush.

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Are multi purpose units efficient?

Monday, November 29th, 2010

As the name indicates, it is a multi process unit that can perform different welding operations and a complete welding package. You can do anything in welding by using this package and it is designed for weldor’s convenience with greater portability. You can do all types of welding such as MIG welding, TIG welding and stick welding with a smooth and clean finish. With the help of this unit, the users can do both welding and cutting. It is typically used in spot repairs, general repair, motor sports and fabrication.

It does not occupy much space and fits into your space and budget. It has self explanatory control panels and each model have separate wire feeds. It can be used in both indoors and outdoors and you can perform multiple jobs at the same time. You can acquire high duty cycles with quality weld and both beginners and professionals can use this machine. Multipurpose units are more efficient than other welding machines because you can do the welding process as efficiently as possible.

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Factors to consider before buying portable welders:

Monday, November 22nd, 2010

If you want to buy portable welders you have to consider certain factors. Some of the things to consider include the type, voltage and cycle time. This article will give you a few tips for buying portable welders.

Type:

When buying portable welders you should consider the type you want. Two types of welders are available in the market like MIG and stick welders. Stick welders are less expensive than MIG welders.

Voltage:

Voltage required for this type of welders is 110 or 220 volts. Welders with higher voltage will have more power.

Thickness:

You have to consider the thickness of material also. If the material is less than 3/16 inch, you can go in for 110 volt welder. For thicker materials, go in for 220 volts.

Cycle time:

Cycle time is nothing but the amount of time that you run the welder before it is turned off and given rest. Different portable welders have different cycle times. Always choose one with the lowest time so that you don’t have to spend a lot of time waiting for the welder cool off.

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A note on Stick welders:

Wednesday, November 10th, 2010

Shielded metal arc welding (SMAW), also known as stick welding is a manual arc welding process that uses a consumable electrode coated in flux to lay the weld. Due to its versatility and its simplicity, Shielded metal arc welding is one of the world’s most popular welding processes. It can be used in construction of steel structures and in industrial fabrication. The process is used primarily to weld iron, steel, aluminum, nickel and copper alloys.

Stick welding is used for fabrication, Repair, construction, pipe, steel erection, ship building and foundries. It can provide single phase, 3 phase or both types of input power. Output power can be AC/DC power.

How to stick weld:

• Choose the steel you want to weld. It can be plain carbon steel which is less than 1 percent carbon, less than 0.1 percent silicon and less than 0.035 percent sulfur.

• Choose the joint position you want to weld based on the thickness of the metal.

• Make sure that joint geometry is correct.

• Clean the joint before welding to attain the best travel speed.

• Use largest electrode that is practical.

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Tips on how to weld using stick welding:

Tuesday, October 5th, 2010

Welding is a process where you weld aluminum steel and other metals and one should know how to weld in a proper way and here are some tips that guide you on how to weld,

• The first step is to gather all your materials such as welding machine, electrode and wire brush to clean the welds.

• Prepare the area to be welded in and find a good surface to weld on.

• Put on your welding safety gears such as welding helmets, welding gloves and welding goggles.

• Set up the welding machine and clean the metal before welding.

• Tap the metal and build up a weld pool .

• Start moving the weld pool and continue the pool towards the end of the metal.

• Pull the electrode form the metal and allow it to cool.

• Use the wire brush to clean the weld and allow the metal to cool.

Maintain a stable arc and create a good pool so that you acquire a good control over the welding process.

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Stick welding- the most popular welding process:

Wednesday, September 29th, 2010

Stick welding is the most popular welding process because of its versatility and its simplicity. It is a manual arc welding process that uses a consumable electrode and it is extensively used in steel structures and industrial fabrication. It is the most dominant welding process that is used to weld iron and steels, but other metals such as aluminum, nickel can also be welded. Stick welding gain its popularity from 1960s and the manual welding uses different flux coatings designed to work with specific types of steel and welding applications. This is called as manual welding because it requires the operator to handle the torch.

The choice of electrode for SMAW depends on a number of factors, including the weld material, welding position and the desired weld properties. Manual welding uses different flux coatings designed to work with specific types of steel and welding applications. Stick welding is the choice to weld stainless steel and this method of welding utilizes equipment that is typically the least expensive. The stick welding will require the weldor to remove the slag residue from the cooled weld by chipping it away with a hammer and cleaning it with a wire brush.

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How to improve stick welding?

Monday, September 27th, 2010

DC welding is considered best for stick applications due to following reasons:

• Easy to start
• Less spatter
• Easy vertical up and overhead welding
• DC provides 10 percent more penetration at a given amperage than AC
• DC welds thinner metals better

A 225 to 300 amp welding machine handles almost anything the average person will encounter, as most stick welding procedures require 200 amps or less. Duty cycle is the number of minutes out of a 10 minute cycle a welder can operate. Duty cycle and amperage are inversely proportional. The type of rod that is used for welding are hard facing rods as it can provide resistance, abrasion resistance or both depending on the application. Stick welding is more forgiving on unclean conditions, but it never hurts to clean parts with a wire brush or grind off excess rust. If you prepare well and have average welding ability, you can make a sound weld.

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How to stick weld?

Wednesday, August 18th, 2010

Stick welding is known as manual metal arc welding or shield metal arc welding. This is very popular form of arc welding. Select the steel to weld. Steel should be in plain carbon steel with less than 1 percent carbon, less than 0.1 percent silicon and 0.035 percent sulfur. Find the joint position based on the thickness of the metal. This angle should be lower for thicker metal with a 45 to 75 degree angle being best for 10 to 18 gauge steel. Make sure that joint geometry is correct. Width should be consistent for the entire joint. Clean the joint before welding to attain the best travel speed. Use the largest electrode that is practical. This is generally 3/16 inch for overhead and vertical welding while 5/32 inch is usually the maximum size for low hydrogen applications.

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The Multiple Uses of Stick Welder

Wednesday, April 28th, 2010

A stick welding is something that we can learn it so easily and is very much useful in a lot of places. Stick welding or the Shield metal arc welding is a manual arc welding process in which a consumable electrode coated in flux is used to make the weld on a surface.

DC welding will make the most benefit over AC for almost all the Stick applications, which includes trouble-free starts; less arc outages along with sticking; a smaller amount spatter or even neat looking welds, easier vertical up as well as overhead welding and you can also learn easier to weld, and a smoother arc.

In case of DC reverse polarity or the electrode positive offers about 10 % additional diffusion at a given amount of amperage when compared to AC, at the same time as DC straight polarity or the electrode negative welds that gives thinner metals, better the output.

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