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Welder Magnets
Checkout Ebay Auctions For The Cheapest Prices
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 EYEREX REX MAGIC WELDING HELMET / WELDERS MASK BLUE + MAGNETIC ARC DETECTION  US $232.96
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 Flame Skull Auto Welding Helmet +Weld Magnets & Cleaner Combo Deal DIY Welders US $78.49
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NEW 4 PC SET WELDING MAGNETS WELDER ARC TIG MIG WELDING Sale Price: $3.44  |
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New Page 1 4pc Mini Magnetic Welding Holder Holds Work at 45 Degree, 90 Degree, 135 Degree Angles Maximum Weight Capacity per Magnet: 10lb. Compact Design High Gloss Enamel Plates New |
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Bessey WMS-5 Magnetic Hold Down Square List Price: $18.78 Sale Price: $15.47 |
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JMCWMS-5 Features: -Price Is For One Each -Minimum Order Of 1.-Super Square Multi-Purpose Magnetic Square like having a second pair of hands..-NON ENCLOSED MAGNET JAMES MORTON.-UNSPC CODE: 27111800.-Precision Measuring (Micrometers, Squares, Levels, etc.) Precision Measuring (Micrometers, Squares, Levels, etc.) mro and plant maintenance precision measuring micrometer micrometers carpenter square level levels.-SQUARE MAGNETIC MULTI-PURPOSE. |
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2 Adjustable Swivel Welder Welding Angle Magnet 50lb Sale Price: $14.99 |
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Hobart 770566 500-Amp Magnetic Ground Clamp Sale Price: $10.49 |
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Hobart 770063 Welding Magnetic Holder - Large Sale Price: $11.25 |
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Multi-purpose magnets hold steel pieces in place at 45, 90 and 135-degree angles. |
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Hobart 770062 Welding Magnetic Holder - Small Sale Price: $9.35 |
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Hobart Small Magnetic Holder 770062 |
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Magnet Holder List Price: $9.89 Sale Price: $3.14 |
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- Multi-purpose - Holds 25 lbs. - Small support jig - Ideal for holding objects while tack-welding, soldering, and pipe installation - Strong magnet holds iron materials at 45 degrees, 90 degrees, and 135 degree angles |
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2 Piece Magnetic Welding Holder Sale Price: $4.49 |
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UPC: 7946851625892 Piece Magnetic Welding Holder |
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Adjust Angle Welding Holder Sale Price: $6.98 |
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UPC: 794685158759 * Ideal for welding and assembly * Swivel arms hold objects at any angle * Magnet swivels a full 360 degree * Each magnet holds up to 125 lbs. |
Here are some more information for Welder Magnets:
We can continue with the history of this by looking at what happened at the later years, which also influenced the production of the power generator set. Later on, one famous guy named Michael Faraday, which was the father of electromagnetism, would then later come to invent and properly induce the electromagnetic properties of a generator. What he looked at was the potential difference that would be generated between the two ends and points of a conductor that was powered by electricity and from there, how to make it perpendicular to the magnetic field that was being produced by the magnets themselves. He was the first person to build a properly functioning electromagnetic generator and this was called the disk, which he self named as well. What was being used in that instance was that a copper disc was placed at the centre of a magnet that was shaped like a horseshoe, and the reversing poles allowed it to move around, creating a very small voltage that could be used. Now this was the first time that a proper generator was being created without having to depend on an electrical connection at all.
Now of course, in hind sight, when we are looking at this and comparing it to a modern day power generator, what is going to happen is that we are going to see the process of evolution. As a starter and as a power source, the disk had many short comings and faults, and of course, this was a prototype that would later be refined over the years. There were many holes in the production of the current and this was due to the fact that the magnetic field itself was not optimally used and that there were many self canceling regions within it itself. What this means is that there would be areas where the current would be cut off completely before rejoined again, and it was only the momentum of the disk that allowed it to continue. As a reliable power source, this could only be intermittent at best and was not a viable solution at the end of the day. Looking back at this, there could have been better ways to do this, and over time, there was improvements made. Also, the voltage that was given off was also very low, and it could not power even the smallest of appliances reliably, and thus was rendered useless. But as an experiment, this was a complete success, because of the potential it had to influence the production of the dynamo, and later on, the modern day power generator set that we all know today. Because of the work of people like them, the world today has many solutions for portable power and power itself, and we have them to thank. Now the concept of the power generator set is something that is common place in our society and we need to understand how this applies to us, our reliance and how we move on from there.
Expert articles on Diesel Power Generators and Gas Power Generators
Find the widest range of induction heating system for forging, brazing, annealing, etc
More Welders Resort to Induction Heating For Preheating, Stress-Relieving
Traditional Induction Heating Applications
- Soldering
- Brazing
- Surface hardening
- Tempering
- Bonding
- Curing
- Encapsulating
- Melting
- Forging
- Super heating
- Crystal growing
Although many industries have used induction heating for decades, it's a newcomer to industrial and construction applications involving welding. Pre-heating before welding and stress-relieving (i.e. postheating) after welding are the new uses for induction heating, and companies with weldiang-intensive operations have significantly increased efficiency as a result.
Induction heating: how it works
Induction heating systems employ non-contact heating. They induce heat electromagnetically rather than using a heating element in contact with a part to conduct heat, as does resistance heating. Induction heating acts more like a microwave oven; the appliance remains cool while the food cooks from within.
In an industrial example of induction heating, heat is induced in the part by placing it in a high-frequency magnetic field. The magnetic field creates eddy currents inside the part, exciting the part's molecules and generating heat. Because heating occurs slightly below the metal surface, no heat is wasted.
Induction heating's similarity to resistance heating is that conduction is required to heat through the section or part. The only difference is the source of heat and the temperatures of the tool. The induction process heats within the part and the resistance process heats on the surface of the part. Depth of heating depends on the frequency. High frequency (e.g., 50 khz), heats close to the surface, while low frequency (e.g., 60 Hz) penetrates deeper into the part, placing the heating source up to 3 mm deep, allowing heating of thicker parts. The induction coil does not heat-up because the conductor is large for the current being carried. In other words, the coil does not need to heat-up to heat the workpiece.
Induction heating system components
Induction heating systems can be air- or liquid-cooled depending on application requirements. A key component common to both systems is the induction coil used to generate heat within the part.
Air-cooled system
A typical air-cooled system consists of a power source (5kW or 25kW), induction blanket, and associated cables. The induction blanket consists of an induction coil surrounded by insulation and sewn into a high temperature, replaceable Kevlar sleeve. This type of induction system can include a controller to monitor and automatically control temperature. A system not equipped with a controller requires the use of a temperature indicator. The system could also include a remote on-off switch. Air-cooled systems can be used for applications up to 400 degrees F, designating it as a pre-heat only system.
Liquid-cooled system
Because liquid cools more efficiently than air, this type of induction heating system can be used for applications requiring higher temperatures, such as high-temperature preheating and stress relieving. The principle differences are the addition of a water cooler and the use of a flexible liquid-cooled hose that houses the induction coil. Liquid-cooled systems also generally use a temperature controller and built-in temperature recorder, particularly important components in stress relieving applications. The typical stress relieving procedure requires a step to 600-800 degrees F, followed by a ramp or controlled temperature rise to a soak temperature of approximately 1250 degrees F. After a hold time, the part is control-cooled to between 600-800 degrees F. The temperature recorder collects data on the part's actual temperature profile based on a thermocouple input, a QA requirement for stress relieving applications. The actual procedure will be determined by the type of work and the applicable code.
Induction heating benefits
Compared to conventional preheating and stress relieving methods, induction heating offers numerous advantages, including improved heat uniformity and quality, reduced cycle time, and lower consumables costs. Induction heating is also safe, reliable and easy to use, and scores higher than alternative technologies in power efficiency and versatility.
Uniformity and quality
Induction heating is not particularly sensitive to coil placement or spacing. Generally, the coils should be evenly spaced and centered on the weld joint. On systems so-equipped, a temperature controller can establish the power requirement in an analog fashion, providing just enough power to maintain the temperature profile. The power source provides power during the entire process.
Reduced cycle time
The induction method of preheating and stress relieving provides significantly quicker time-to-temperature. On thicker applications, such as high pressure steam lines, induction heating can slash two hours from cycle time. It is conceivable to reduce cycle time from the control temperature to soak temperature. When combined with other usability factors, it is not uncommon to expect a 50 percent total cycle time reduction.
Reduced consumables costs
The insulation used in induction heating is easy to attach to work pieces and can be reused many times. Conversely, ceramic fiber insulation used in resistance heating can be used only once or twice before it has to be discarded, requiring a large inventory of insulation and incurring significant costs for disposal of potentially hazardous material. In addition, in comparison to resistance system components, induction coils are robust and don't require fragile wire or ceramic materials. Also, because the induction coils and connectors don't operate at high temperatures, they are not subject to degradation, as are ceramic heating pads.
Ease-of-use
A major benefit of induction preheating and stress relieving is its simplicity, which contributes to easy use. Insulation and cables are simple to install, usually taking less than 15 minutes. http://inductionheater.net has shown boilermakers and pipefitters how to use the induction equipment with just one day of training.
Power efficiency
The inverter power source is 92 percent efficient, a critical advantage in an era of skyrocketing energy costs. Additionally, the induction heating process is more than 80 percent efficient. Regarding power input, the induction process only requires a 40 amp line for 25kW of power.
Safety
Preheating and stress relieving through the induction method is extremely worker-friendly. Induction heating does not require hot heating elements and connectors. Very little airborne particulate is associated with the insulation blankets, and the insulation itself is not exposed to temperatures over 1800 degrees F, which can cause insulation to break down into dust and then breathed by workers .
Reliability
One of the most important factors impacting productivity in stress relieving is not interrupting the cycle. In most instances, cycle interruption means the heat treat will need to be re-run, which is significant when a thermal cycle can take a day to complete. The induction heating system components make cycle interruptions unlikely. The cabling for induction is simple, making it less likely to fail. Also, no contactors are used to control the heat input to the part.
Versatility
The Duolin Induction Heat Treatment System was originally designed for preheating and stress relieving of pipe. Now, users of induction heating systems have adapted the process for weldolets, elbows, valves, and other parts. One of the aspects of induction heating that makes it attractive for complex shapes is the ability to adjust the coils during the heating process to accommodate unique parts and heat sinks. The operator can start the process, determine the affects of the heating process in real-time and modify the coil position to change the result. Lastly, the induction cables can be moved without waiting for air cooling at the end of the cycle.
Induction heating in welding applications
DUO LIN Induction Heating Systems, Co, Ltd., the manufacturer of induction heating systems for welding applications, has proven its technology on a number of projects, including oil and gas pipelines, heavy equipment construction and maintenance and repair of mining equipment. Summaries of various projects are presented below.
Oil pipeline
A North American oil pipeline maintenance operation had used a combination of propane torches and electrical resistance to heat pipe before welding encirclement repair sleeves or STOPPLE fittings to the pipeline's 48-inch girth. While many repairs could be made without having to stop oil flow or drain it from the pipe, the presence of the crude itself hampered welding efficiency due to the heat sink effect of the flowing oil. Propane torches required constant interruption of welding to maintain heat, and resistance heating - while providing continuous heat - often couldn't meet required weld temperatures.
The maintenance company turned to induction heating as a solution. On encirclement sleeve repairs, two 25kW systems were employed with parallel blankets to obtain a preheat temperature of 125 degrees F. As a result, cycle time was reduced from 8-12 hours to 4 hours per girth weld. Preheating for a STOPPLE fitting (a "T" junction with valve) repair had been even more challenging due to the fitting's greater wall thickness. With induction heating however, the company used four 25kW systems with a paralleled blanket set-up. Two systems were used on each side of the "T". One system was used on the mainline to preheat the oil and the second was used to preheat the "T" at the circumferential weld joint. The preheat temperature was 125 degrees F. The weld time was reduced from 12-18 hours to seven hours per girth weld.
Natural gas pipeline
A natural gas pipeline construction project entailed building a 36 in. diameter, .633 in. pipeline from Alberta, Canada to Chicago. On one spread of this pipeline, the welding contractor used two 25kW power sources mounted on a tractor with the induction blankets attached to booms for speed and convenience. The power sources were used to preheat both sides of the pipe joint. Critical to this process was speed and reliable temperature control. As alloy content increases in materials to reduce weight and weld time, and to increase part life, controlling preheat temperatures becomes more critical. In this induction heating application, it required less than three minutes to obtain the 250 degrees F preheat temperature, versus approximately five minutes using traditional preheating methods. In addition, temperature uniformity and operator safety were improved.
Heavy Equipment
A heavy equipment manufacturer often welds adapter teeth onto its loader bucket edges. Previously, the tack welded assembly was moved back and forth to a large furnace, requiring the welding operator to wait while the part was reheated repeatedly. The manufacturer opted to try induction heating to preheat the assembly to prevent movement of the product. The material is 4 in. thick with a high required preheat temperature due to alloy content. Duolin Electric worked with the customer to develop customized induction blankets to meet the application requirements. The insulation and coil design provided the added benefit of shielding the operator from the part's radiant heat. Overall, operations were considerably more efficient, reducing welding time and maintaining temperature throughout the welding process.
Mining equipment
A mine had been experiencing cold cracking problems and preheating inefficiency using propane heaters in its repair operations of mining equipment. Welding operators had to remove a conventional insulating blanket from the thick part frequently to apply heat and keep the part at the correct temperature. The mine opted to try induction heating using flat, air-cooled blankets to preheat the parts before welding. The induction process applied heat to the part quickly. It also could be used continuously during the welding process. Weld repair time was reduced by 50 percent. In addition, the power source was equipped with a temperature controller to keep the part at the target temperature. This virtually eliminated rework due to cold cracking. The customer reported an annual savings of $80,000.
Power plant
A power plant builder was constructing a natural gas power facility in California. Boilermakers and pipefitters had been experiencing construction delays due to the preheating and stress relieving methods they were employing on the plant's steam lines. One of the biggest problems on this job was reliability of the electrical resistance equipment, which suffered from contactor and connector failures and broken wires on the heating pads during stress relieving. Extensive rework as a result, combined with long heating cycles, was delaying construction significantly. The company brought in induction heating technology in an attempt to increase efficiency, particularly for work on medium to large steam lines, as these pieces take the most heat treating time required on a job site.
On a typical 16 in. weldolet with a 2 in. wall thickness, resistance preheating and stress relieving used to take five-and-a-half hours to complete. Induction heating was able to shave two hours off the time-to-temperature (600 degrees F) and another hour to reach soak temperature (600 degrees F to 1350 degrees F) for stress relieving. The simplicity of wrapping the induction blankets around complex shapes further reduced the time to perform the heat treat. It took the fitters 15 minutes to wrap a joint that would have required two workers two hours to prepare using a resistance set-up.
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I want to build a generator sorta like the ones they build for windmills?
I have learned the larger u make the disc and the more magnets u use the slower it has to turn to make electricity.
The magnets they sell for this are high priced as all get out and I am wondering two things.
Can I use welders magnets that are designed to hold steel in place until it is tack welded, and 2nd., can I cut the magnets.
I am a welder and have used these magnets for years. I have some that are more than 20 years old and they still work great and I can buy some at www.harborfrieght.com for $ .97 each compared to 30 bucks for the same pull that thay sell for building generators for wind mills.
HELP if you can. No one in the business will answer my e-mails.
You are correct in that the larger the disc the slower the revs have to be.
If you want to design a generator yourself, you have to use high grade neodymium magnets which are cheap and readily available on Ebay. Use the 1" round by 1" high cylinder magnets. They fit nicely into a rotor disc where you have drilled equally spaced 1" holes. Care has to be taken that the holes are spaced so that the phases when the magnets pass over the pick-up coils are correct ..... so you get the maximum amplitude out of the coils. In other words - if the spacing is wrong and the magnets are too close together or too far apart, you get a distorted waveform of lower amplitude.
I can tell you that by experience. I build a 16" motor generator out of nice 1" Lexan discs and did not check the spacing of the 16 magnets....... Needless to say, I have to build a completely new device which is a very expensive undertaking when one looks nat the price of a lexan sheep of 1/2" thickness costing $750! . I had to machine a mock-up device where I could vary the distance of the magnets which I mounted in a drill. the balanced device passed in front of a pick-up coil mounted in a vice and I monitored the waveform of the coil on an oscilloscope. At one point/setting I got a beautiful sine wave with minimum distortion AND maximum amplitude. THAT was the perfect distance producing the most efficiency in current/voltage.
Having said that - you need of course the pick-up coils which you have to wind yourself on large plastic bobbins using heavy wire like 1.5mmm transformer wire. The coils have to have a soft iron core for best efficiency. That can be of REbar material and should be ,machined and tightly fixed in the coils.
I used an odd/even configuration re magnets and coils to overcome the STRONG cogging effect. That means I used 15 coils on the stator plate and 16 magnets in the rotor disc. That way the cogging effect is mostly neutralized.
I can help you out if you like - having experimented for quite a few years with Over Unity devices, "free" energy, MEGs etc (Look up Bearden, Bedini and others). Unfortunately..... I have not been able so far to get more out of a device than I put in 
I could tell you way more - but time is sort of short at this very moment. I can tell you what to avoid......
Solar Powered Devices Put To Use
On this, the longest day of the year, a Montgomery County recycler isn't wasting a single ray of sunshine.
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