Archive for the ‘Stick Welding’ Category

Stick welding and its nuances

Wednesday, December 7th, 2011

Shielded Metal Arc Welding commonly known as stick or covered electrode welding one of the most widely used welding process. The instability casing the electrode thaws during welding.  This shapes the gas and slag to defend the arc and molten weld pool.  The slag must be flaked off the weld blob after welding. The fluctuation besides endow with the technique of toting up scavengers, deoxidizers, and alloying rudiments to the weld metal.

While proceeding with the stick welding process, it is necessary to consider the following points which include power setting, length of arc, angle of electrode, operation of electrode and velocity of travel.

There are several benefits associated to stick welding and it includes:

Equipments are simple to use

Easy on the pocket and portable

Potential to all positions

Inferior sensitivity to wind and drafts

Because of the accessibility of an extensive range of electrodes, the process finds infinite applications.

An immense series of metals and their alloys can be welded.

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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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Basics of Arc Welding

Tuesday, May 3rd, 2011

Welding is a very easy process to learn about. Arc welding and stick welding are one of the most basic and common welding techniques that are initially thought to every welding student. Arc welding can be thought in four basic steps.

Step1: Equip yourself with safety accessories before you enter the domain to weld. This is a must irrespective of what your experience in welding is. Even the most experienced, brilliant welder has to take care of safety precautions before he starts to weld.

Step2: Always work with clean metals. This is a preparatory stage of welding. Clean your work piece properly before you work upon it.

Step3: Check for the welding earth connection. Make sure it is good. You are mainly using electricity to carry out the task of welding and if your earth connection is not good enough, you are most likely to mess up the task. An area of potential problems can be eliminated

Step4: Strike the arc properly. This is one of the biggest concerns for any welder and there are only three possible ways to do it;

•    Flick up from an edge
•    Strike like a match/scratch it
•    Tap it straight down, then back up

Hold the rod as straight as possible.

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Basics of Arc Welding

Tuesday, April 5th, 2011

Welding is a very easy process to learn about. Arc welding and stick welding are one of the most basic and common welding techniques that are initially thought to every welding student. Arc welding can be thought in four basic steps.

Step1: Equip yourself with safety accessories before you enter the domain to weld. This is a must irrespective of what your experience in welding is. Even the most experienced, brilliant welder has to take care of safety precautions before he starts to weld.

Step2: Always work with clean metals. This is a preparatory stage of welding. Clean your work piece properly before you work upon it.

Step3: Check for the welding earth connection. Make sure it is good. You are mainly using electricity to carry out the task of welding and if your earth connection is not good enough, you are most likely to mess up the task. An area of potential problems can be eliminated

Step4: Strike the arc properly. This is one of the biggest concerns for any welder and there are only three possible ways to do it;

  • Flick up from an edge
  • Strike like a match/scratch it
  • Tap it straight down, then back up

Hold the rod as straight as possible.

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Tips for Field Repair

Tuesday, March 22nd, 2011

It is important to have the best of quality equipments and immense knowledge in welding along with at most concentration when we are working with welding applications. Selecting proper engine driven welding generators, plasma cutters and other repair tools helps you to prevent downtime by fixing repair works right at the first time.

Equipment repair is adds up to your vows more compared to the complications you encounter while you weld. Every minute your machine turns down is a minute of lost time and minutes turn to hours when servicing those machines. Immense knowledge and experience in welding enables you to estimate the right kind of tools you always would need for the job and helps you to reduce downtime drastically and finish off the work quickly. At the end of the day your intelligence and quality of equipments predicts the outcome whether it’s a profitable one or not.

In order to finish off the field repair there are five basic steps you need to follow;

1.    Cut out broken steel with Oxy-fuel, Plasma or Carbon arc Gouging. This is the initial step         when  it comes to field repair. Most contractors have oxy fuel equipments for cutting, brazing, soldering, and preheating welding surfaces
2.    Match and cut replacement steel. Match your equipments based upon their strengths and  replace them. Cut your steel to its required size.
3.    Preheat to eliminate cracking. Fill the replacement steel to find irregularities and check its fitting. After achieving proper fit, preheat the surface with oxy-fuel equipment.
4.    Electrode Selection and Welding Technique. Mostly stick welding technique is preferred.
5.    Select your welding system. This factor depends upon the electrodes you have chosen in the previous step.

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Common Problems Encountered While Practicing Stick Welding

Monday, March 21st, 2011

Out of all welding methods, Stick Welding or the shield Metal Arc Welding is the most adaptable one which is also versatile. A beginner can also easily handle a stick welder if practiced properly within a short period of time. Just like any other welding techniques, the shield metal Arc Welding also has its own troubles. Here is a list of the most common ones and they are actually easy to handle and identify.

Spatter is one of the common types of imperfection which will make the work piece look little messy and is something that is pretty pricey to clean it out totally.

Next trouble will be the Undercutting. This is also something to do with the look of the work piece as it will change its appearance and will weaken the weld that you have made.

Wet Electrodes is a problem that you can notice when you see it the arc is erratic or just rough. Always keep your electrodes away from any pollutants and water to avoid this complaint.

Cracking, this is the most common complaints encountered especially when there is high carbon or high alloy content.

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What is CLAMS?

Friday, March 18th, 2011

The stick welding or the shield metal arc welding (SMAW) is one of the most used methods of welding techniques. We call SMAW as stick welding just because of the shape of the electrode that looks like a stick, which is responsible for the crust formation of the weld. When you want to make sure that your weld must turn out to be the perfect one, there are five important things that you will have to keep in your mind and welders call it as CLAMS. The full form of this jargon goes like this…

C – Current setting
L – Length of arc
A – Angle of travel
M – Manipulation
S – Speed of travel

These five points are the stuffs that you will have to take care off while carrying out the welding process, if you need that perfect weld. Most importantly, a welder must be ever ready to face any kind of disturbance or mechanical malfunctions.  Be calm and learn from the mistake you make and never be in a hurry while you perform the task. Always keep yourself well equipped and protected with proper protective gears to avoid any accidents.

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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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