Welder World Blog

Archive for January, 2010

IGBT Plasma Cutters

Plasma cutting in simple is a process through which steel and metal of different sizes and thickness is cut through the plasma torch. During this process, the inert gas or compress air used in some machines is blown at very high speed from the nozzle and at the same time electrical arc is made from the gas of nozzle to the surface needed to cut which turns some of the as to plasma. This plasma is suitably hot to easily melt the metal that is cut and it also moves fast to blow the metal far from the present cut. Additionally Longevity plasma arc cutters and several other applications also use IGBT plasma cutting technology which enables for Longevity to provide more commercial plasma cutting equipment.

The starting method

The Longevity IGBT plasma cutters generally use a different method to start the pilot arc and are built for professional metal working environments. Some IGBT plasma metal cutters might often use high frequency starting technology, high voltage circuit just for the starting process and others use Pilot Arc starting technology, where the torch enables a constant arc without touching the work piece. A Longevity IGBT plasma cutter featuring high frequency starting technology is more affordable, but also possesses a technological inferiority because of spark gap maintenance, difficulty of repair and you might also find a huge amount of radio frequency emission. Those plasma cutters which work near sensitive electronics like computers or CNC hardware would use the contact start method. The electrode and nozzle would be in contact. Here the nozzle would be the positive and electrode is the negative. So, when the plasma cutter gas starts to flow nozzle would be flown forward. However the other method which is less common is the capacity discharge in the main circuit through silicon controlled rectifier. In most cases Longevity uses Pilot Arc starting technology with IGBT Plasma Cutters because of the popularity and importance of a quick starting arc.

Inverter IGBT plasma cutters

The analog plasma cutter would generally need above 2 kilowatts and they also use heavy mains frequency transformer. The inverter plasma cutters generally rectify the main supply to the DC supply which is give as a high frequency transistor to nearly 200KHz. Some higher switching frequencies would give even greater efficiencies in transformer which allows its weight and size to be reduced.

The transistors that were commonly uses before were MOSFETs but today IGBT plasma cutters are highly being used in commercial or industrial applications where the demand of the size of the amperage is high. When placed parallel with MOSFETs and one transistor activates too early then, it can lead to cascading problem of one of the quarters of inverter. However with the newer invention and by using IGBTs, the Longevity Testing Team was able to avoid this problem. The IGBT plasma cutter can be commonly found in several high current plasma metal cutting machines that put out more than 60amps of power.

The Longevity ArcMate M200 IGBT Mig Welder is the first device to include IGBT technology in the Longevity Welding Equipment lineup, which achieved great success for MIG Welders able to compete with the leading brands and it enabled a it opened the doors for other IGBT welders and plasma cutters. After carefully testing a number of IGBT products by the Longevity Testing Team and well received recognition from welding professionals, it lead to the launch of the IGBT plasma cutters and welders full line up. These units are of top notch quality, are easily portable and can compete with any major brand that is today available in the market regarding both the price and quality.

Wire feed welding machines are also known as mig welding machines or for short, a mig welder.

Regardless of what you call the machine they all have the same basic features.

Going by the description of the name, you need to feed wire.  As this wire is feeding, electricity melts it and the base metal together.  This is essentially how it works.  As long as you keep wire up to the electric arc you will be able to weld all day long.

Now to control this you hold on to what is called a mig welding gun.  This allows you to accurately place where you want your weld to be.

Wire feed welding machines are rated by their power output in amperage (Amps).  So for example a small machine might only be rated at say 90 amps and a large machine might be rated at 500 amps.

The more amps the more electricity is used which means you have to heat needed to weld thick metal.

Another point to look at, is what is called duty cycle.  Now just because one machine might be rated at 100 amps and another machine is rated at 140 amps this doesn’t mean that the 140 amp machine is better.  Welding duty cycle is a figure that is given for how much work the welder can do at full power and for how long.

This is rated in a percentage, so for example 20%, 30% and 40%.  What this tells you is that how long you can weld for in either a five minute block or ten minute block of time.  So if your machine is rated at 20% duty cycle you could only weld at full power for 20% of either 5 minutes or 10 minutes. The trick here is to know what time frame your duty cycle is rated at.

So let’s assume that your machine is using a 10 minute time cycle.  This means that you can weld for two minutes at full power (20%).  Now for the rest of the time which is eight minutes you cannot weld at all, you have to let the machine cool down.  This is definitely one thing to look out for when you go to buy a mig welding machine.

A wire feed welding machine will also use consumables.  The main consumables that you will need to keep buying will be your contact tips, nozzles and shrouds and gas diffuser.  There are other consumables that do need replacing but not so frequently.  They are your liner, contact tip holder and maybe a few O-rings depending on what model welding torch you use.

To find out more detailed information about wire feed welding machines go to my website and see some photos and videos all about welding:  Wire Feed Welding Machines

The demands of today’s global marketplace can put as much pressure on a business owner as a resistance welder puts on coil ends to create a join with electric current. Fortunately there is one equipment maker who has been at the top of the manufacturing world for more than half a century – Guild International Inc.

A world leader in designing and manufacturing of tube mill entry machines for steel processing, Guild International Inc. strives continuously to meet or exceed the rigorous engineering standards its clients have come to expect and value. Factories of all sizes around the world use Guild equipment for all their steel processing needs.

Customers know that they can rely on Guild machines. This is because they have seen first hand how well they perform in factories of all kinds and sizes. From resistance welders to tube mill entry machines for steel processing, Guild’s machines consistently increase manufacturing productivity at thousands of strip processing companies around the world. All types of coil processing lines, using all kinds of materials, improve when Guild equipment is used. Guild has been a leader in this field of manufacturing since 1958.

As for tube mill entry machines, there’s Guild’s UNC Uncoiler. Made of heavy-duty fabricated steel construction, the UNC Uncoiler operates on many different kinds of processing lines, such as roll form lines or high-speed tube and pipe mills. This machine comes in both single- and double-arm units. The different types of units assure the best fit for any manufacturer’s process.

In addition, Guild offers the SL Superloop ™ Accumulator. This unit performs perfectly for small- and medium-size mills, thanks to its patented overspeed feature, which creates large amounts of usable storage. Flexible entry and exit points allow for installation in new or existing lines. This accumulator can handle material from about .03″ thick up to .312″ thick and line speeds from approximately 50 FPM up to 900 FPM.

There’s also the SCA Supercoil horizontal strip accumulator. These units are designed for use in medium and large pipe mills. Like the SL Superloop, the SL Supercoil comes with large amounts of usable storage and flexible entry and exits points, to make installation in new or existing steel processing lines as simple and effective as possible.

Both the Superloop and Supercoil accumulators and the UNC Uncoiler are designed with the same exacting standards that Guild’s engineers put into all its machines. Customers who install Guild machines into their factories are assured of top-quality performance every time.

Tube mill entry machines and accumulators are only two of the many patented manufacturing products that are offered by Guild International Inc. When you take a look at their catalog you will see it includes products such as its Zipwelders™, semi-automatic shear welders, resistance welders, and a full line of rotary and cropshears along with speed funnels and flatteners.

Guild’s team of engineers can help any factory determine its manufacturing needs, assuring proper equipment design and compatibility with legacy systems. Guild International is the recognized leader in coil machinery for all steel processing needs.

Sometimes you may not wearing welding jacket which may cause injury to your skin. To get away from injury, it would be better if you wear a welding jacket. To protect yourself while welding it is important that you wear protective apparels. The primary sources of injuries are: Electric Shock, Fumes, Gases, Arc Rays, Fire, Explosion, Hot parts, Flying metal, Noise and others. While welding, ultraviolet rays and infrared rays can burn your skin or harm your eyes. Sparks and spatter can burn your skin, your hair and your clothes.

In the past, welding operators used heavy, fixed-shape traditional passive helmet. Bu the trend has changed now, auto darkening helmets are worn by many operators. This type of helmet offers wide range of darkening shades, sensitivity controls, reaction speeds etc. Modern auto-darkening helmets allow you to adjust the settings based on your personal preferences and light sensitivities. Features like grind mode, multi arc sensors and delay control ensure that you are protected before, during and after welding.

Auto darkening helmets have a UV blocking lens that can protect your skin and eyes from the effects of UV rays. One more important thing to notice is that the weight of the auto darkening helmet is half the weight of the traditional fixed-shade passive helmet. It’s important to note that all premium quality auto-darkening helmets rate their helmets to provide a darkening speed of at least 1/6000 second down to 32 degrees F.

Always wear ear plugs, welding cap and bandana, head protector to protect your skin from welding. For all welding safety apparel, avoid using synthetic materials, as they will melt when struck by spatter and can cause burns. Some of the flame resistant fibers like denim and leather can provide protection and comfort. While selecting a welding jacket choose one that matches your work environment and application. If you’re welding in a non air conditioned garage in South Florida, you may feel hot in a full leather jacket. In such a situation it would be better if you wear a lightweight, flame-resistant cloth jacket or a natural fiber t-shirt and welding sleeves which are flame-resistant. If the work place isn’t much hot and you’re working for several hours everyday, then it would be better if you wear half-leather, half fabric jacket, which will provide good flame resistant and long product life.

Your hands are close to the body. To protect them from spatter you have to wear gloves. Since TIG welding requires dexterity, wear TIG gloves that are thinner and made out of softer, more sensitive leather. MIG and Stick welding produce lot of heat, sparks and spatter and do not require a high degree of dexterity, so use gloves that are made up of thicker, stiffer leather.

If you want to protect your leg, choose apparel that has a combination of both safety and comfort. Finally, choose leather footwear that covers your entire foot. High-top leather shoes and work boots, provides best protection against sparks and spatter.

Need to discover how to mig weld?

Great! Mig welding is easy! Just ask anybody… You can teach a monkey to mig weld, Right?! All you need to know is pull the trigger and hold on… Oh yeah?

Come visit us right here for more Welder and Welding Info and get two Welding Ebooks Mig Welding Video. http://www.welderworld.com/

system number one to be told how to mig weld :
1. Buy machine
Get scrap metal

Learn fundamentals

four.
5. Practice
6. Write down what works and keep notes in pouch on machine.

Method number two to learn how to mig weld :
1. Attend a mig welding class at Technical College and use their machines, metal, gas, and other costly stuff that you would scrimp on if you needed to get it yourself. Pick the coaches brain for every welding tip you can get. Actually apply yourself and listen to every word he or she says. ( that is’s right, there are some good chick welding instructors out there )

two. If you need to …buy a machine.

What’s a good machine? I like Miller welding machines. Why? Many reasons : made in USA, service and support are great, great resale worth, parts are available, they are damn good machines. Now there’s always an exception to each rule so listen up!
And when I do, I will search eBay and craigslist for a Lincoln 115v mig welder.

if you are going to be welding mostly body panels on automobiles, or gas tanks for choppers, purchase a 115v machine. Either way, buy used from eBay or Craigslist if you can. Here’s why… First off, 115 volt mig machines are sort of like bowflex fitness machines, nobody wears them out, and used ones are nearly as good as new ones. You should buy a used Lincoln mig for 2 hundred $, use it for 4 years and sell it for 200 bucks. Sounds rather good doesn’t it? Same goes for the bigger 230v machines. Buy a used millermatic 180, 250, 251, or 252, for 600-800 greenbacks, use it for several years and if you want to sell it you can simply break even or maybe make a few bucks..or to keep things easy, just get a millermatic 250 and call it a day.

Come visit us right here for more Welder and Welding Info and get two Welding Ebooks Mig Welding Video. http://www.welderworld.com/
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Rig welding jobs pay about $62,000 a year. This is more than double the average salary of welders in the producing industry – good news as more production jobs move overseas. Even if this can be your first oil rig job, you still have an opportunity to get hired.
The oil industry is always looking to hire qualified rig welders – the key point being’qualified’. Of course, it helps to be certified, whatever that suggests in your jurisdiction.
In the UK, some oil corporations need their welders to be licensed up to’6 GR’ by CITB ( previously known as city and Guilds ). In the US, much of your welding certification is not transferable between companies, and only lasts for six months. The exception is if you take your welding test at an accredited AWS facility.

Drilling Jobs

For another, he can tell you what sorts of welding he sometimes does on his oil rig – what sort of material, what positions, what processes, and so on and that kind of thing. This kind of info can help you to get ready for the test.

In the 1st type, you are permanently attached to the oil rig. Your job is to hold out repairs and build new metalwork. You go in when a big project should be finished swiftly.

Oil Job Search

Be warned, most oil rig roles ( including rig welder’s jobs ) are most suitable to single younger lads. They are terribly physically demanding and rather deadly. Many oil rigs are located somewhere tricky to reach, so oil rig employees are often no longer in touch with their families. Unless your girlfriend or other half is extremely understanding, you could find your relationship in trouble.

Rig welding jobs pay very well for what is fundamentally blue collar work.

oiljobcentre the best place to search for oil jobs
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There’s a range of opportunities out there, which could be right for you. The Gas and Oil Industry is a worldwide employer, so wherever you are, you’re bound to find the job that’s right for you.

Drillers, Electricians, Mechanics, Medics, Mud Engineers, Offshore Installation Managers, Radio Operators, Welders… The possibilities are endless, and it all begins with skills such as Maths and Science. There are a range of jobs available in the Gas and Oil Industry, which are heavily involved with every stage of extracting oil and gas from reservoirs.

Drillers, are an important part of the Industry, as they are in charge of the drills, and actually drilling the holes needed to find the Gas and Oil, so they play a vital role in the Industry. Electricians are not often thought as required in this Industry, but they are often needed in order for work to progress. They are in charge of maintaining and repairing any electrical equipment, from light bulbs to high-tech electrical machinery.

Manage To Earn Around $3000 – $4000 Every Month Click here

Medics are an essential role within a career in the Gas and Oil Industry, they’re in charge of running the sick bay, keeping track of medical supplies, and keeping medical records. This sort of position is perfect for people in the Medical career track who’d like a change of scenery, or something a little less demanding the Doctors Practices or Hospital Work.

Radio Operators have one of the most laid back jobs in the Industry, as they are in charge of communications with the outside world. And welders, there are a lot of welders out there working in many different fields, and in the Gas and Oil Industry, it’s another job that’s very important. Welders in the Industry carry out day-to-day welding repairs and general building of new metalwork.

The Gas and Oil Industry is a fantastic career to get into, especially if you’ve just finished school and are interested in doing something interesting as a career, then it’s an opportunity for you to get into an interesting journey towards your future career.

You’ll get to study some interesting subjects such as aeronautical engineering, chemical engineering, civil engineering and mechanical engineering. The Oil Industry is a competitive Industry, and Large Internationals companies offer graduate training programmes, which offer both a good salary and invaluable experience for a future career in both oil and gas extraction.

Greenfield Online Survey Scam

Engineering in the Oil and Gas industry generally pays very well, and positions in Oil and Gas, especially engineering, are no exception. Starting salaries may be as high as £35,000! But if you train as an Engineer working for large multinational companies are likely to earn significantly more than those working for smaller companies.

After several years of experience in the role, individuals can expect to their salaries to increase to between £50,000 and £70,000! And Managers in the Gas and Oil Industry with responsibilities may even earn in excess of £90,000 per year!

Bonuses are also a common feature in the Industry, and generous living allowances are often provided for those of you who choose to work overseas.

The advantages of the Oil and Gas Industry is that the world with be using Oil and Gas for many years to come, and if you’re interested, then you can take advantage yourself of the wide range of jobs available in the Oil and Gas Industry for many years to come.

Participating in an online focus group Click here

The welding courses offered by vocational schools are one of the best deals going today. These welding training programs can be completed in anywhere from three to eighteen months. There are certificate level programs, diploma programs, and degree level programs. By analyzing your needs and personal style, you can find a program that offers the right balance of program length and opportunity for growth.

Welding Programs Come in a Variety of Lengths

A master welder program prepares a person to graduate capable to enter basic positions in structural welding and pipeline welding, as well as alloy welding. This program usually takes from 7 to 12 months to complete. This program is a popular choice because it offers an equal balance between program length and opportunities made available.

The higher level course of is the Associate of Occupational Studies in Welding Technology. These welding training courses take from 12 months to 18 months to complete. This is a higher level welding training, which generally includes the same training as a master welding program. The additional time is spent learning quality assurance, which can help student start work as a welding inspector after graduation. This option can offer the most opportunities, but it also takes the most time to complete.

A short-term course is also offered as a basic program to become a structural welder. These programs can take between 3 and 6 months. Because of the expedited nature of the schedule, these programs are great for anyone looking to get trained quickly. On the other-hand, these programs offer the least amount of training, so they usually afford graduates the least amount of opportunities. However, in some situations, the level of training accompanied with the program length is the perfect fit.

Consider a Career as a Welder

At present, research data reveal that qualified welders are in shortage in the United States and the starting salaries for good welders are higher than several other jobs in various industries. You have a chance at a very good future with growth prospects, if you obtain a welding school degree from an accredited vocational school.

When you see the letters AC/DC on your welder, do you think of one of your favorite rock and roll bands? Seriously though, the difference is quite important to the final quality of your welds.

AC (Alternating Current) and DC (Direct Current) is used to describe the polarity of the electric current that the welder generates and in what direction it travels. If you use the wrong polarity for a certain welding rod, your weld strength will not be very good.

The general terms associated with polarity are reverse polarity and straight polarity. These are common to the welding trade. Another way to describe the two terms are electrode positive and electrode negative. Electrode positive is the same as reverse polarity. Electrode negative is the same as straight polarity. Hence the + and the – written on your welder where the cables connect to it.

Any type of welding rod you buy will be labeled as to what polarity should be used for welding with it. Using the correct polarity will ensure the proper penetration and the over all look of the final bead.

If you use the wrong polarity you can tell by the signs. There will be an excessive amount of spatter, you will have bad penetration, and you will have less control of your arc.

Some welding machines have a switch to adjust the polarity. If your welder doesn’t have one you will need to switch the welding cables around where they plug into the machine. If you want reverse polarity, you need to make sure the electrode holder is plugged into the + terminal.

The easiest way to tell if you are using the wrong polarity is by the sound and the feel of the weld you are laying down. If you don’t have much experience with stick welding you will have a little more trouble determining the difference. I have seen guys weld all day long with the wrong polarity. Then I would grab their welder to use for couple of minutes and I could tell right away. It all comes down to experience.

If you don’t have much experience stick welding, you will need to double check the way the machine is set up. Follow what the welding rod package tells you to do and do it. If you are using 7018 rods, you will want to make sure it is set up for reverse polarity.

If you’re already looking at getting your Welder Associate’s degree in Florida or anywhere in the rest of the country, you have probably heard about how much demand there is for qualified welders in the industry.

There are lots of high paying, entry level welding jobs available to qualified welders who have passed their certification tests. Since welding regulation is so granular in the United States and the qualifications are so different based on where you got your welding associates degree or other welding training, it’s important to have good core education to back you up as you search for a fulfilling and lucrative welding career.

Many Welding Opportunities Available In a Variety of Locations

There are many different choices for someone who has attained a Welder Associate’s degree. Some pay much better than others.

• Entry-level “roustabout” welding job on an off shore oil rig can pay up to $60,000 a year, and workers typically get half the year off.

• Joining a local welding union will also help you get steady work with good pay. It’s common knowledge that union jobs pay better than non-union jobs. If you have a more artistic bent working in a custom design shop or machine shop could be a perfect application of your welding skills.

• Pipe welders often make more money than those who can’t weld pipes. Also, welders who can successfully weld different materials such as aluminum and stainless steel are also in high demand and can get paid a lot more.

• Different types of welding have different applications and different pay scales. MIG welding is common and is the easiest type to perform. TIG welding is harder and typically those who are successful TIG welders do well.

Getting an Associate’s Degree is a Great First Step for a Welding Career

The key to finding a welding job that can make your monetary dreams come true is to succeed in the field to begin with. Getting a welding associate’s degree from an accredited welding school is the most important step because that training will help you get a foot in the door so that you can continue your practical education on the job.