Posts Tagged ‘spot welder’

Various types of electrodes used in Spot Welding:

Monday, January 3rd, 2011

Spot welding can be termed as a procedure in which the contacting metal facades are combined together by the temperature produced from resistance to thrilling current stream. Generally, the method utilizes 2 copper alloy electrodes to deliberate welding energy into a tiny stain and at the same time compact the sheets together. The amount of electrical energy is selected to counterpart the sheet’s substance properties, its size and kind of electrodes.

Keep in mind that if you use little amount of energy then you will not be able to melt metals otherwise get a poor joint. On the other hand if you apply excess of energy then it will over dissolve metal and make a mess than a joint. So it is necessary to use required amount of energy. Electrodes that are utilized in spot welding can vary significantly with diverse applications: When it comes to high heat applications, radius style electrodes are utilized. Condensed tip electrodes are used for high pressure, whereas eccentric electrodes used for welding corners. Offset peculiar tips used for reaching into corners and minute spaces.

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Spot Welding- A Unique Welding Process:

Wednesday, December 22nd, 2010

Spot welding is one of the very unique techniques of welding that people have used. This welding is performed by combining heat with pressure and time. Further to this, the process is carried on by using a current flow through the confrontation of the material so that it localizes heat in one spot. The amount of time taken by the current to flow into the joints is based on the thickness and the type of metal that is going to be welded. The main advantage of this type of welding is that the entire sheet does not get heated up during the process as it takes very few milliseconds for lot of energy to flow to the spot to be welded.

Spot welding is also known as resistance spot welding as it is one of the few welding procedure which generates fewer amounts of arc rays and fumes. As tongs and linkages are used, welders have to protect themselves for their own safety from the equipments that are kept around. Hence it is advisable to wear safety equipment before performing the welding activity.

When a welder performs spot welding he has to make sure that the current is flowing through the tip of the metals which are going to be joined. This process of welding is unique as you observe that the welded bead is formed inside the surface of base metal. This process of welding is different from a TIG or MIG spot welding.

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Spot Welding- A Unique Welding Process:

Monday, December 6th, 2010

Spot welding is one of the very unique techniques of welding that people have used. This welding is performed by combining heat with pressure and time. Further to this, the process is carried on by using a current flow through the confrontation of the material so that it localizes heat in one spot. The amount of time taken by the current to flow into the joints is based on the thickness and the type of metal that is going to be welded. The main advantage of this type of welding is that the entire sheet does not get heated up during the process as it takes very few milliseconds for lot of energy to flow to the spot to be welded.

Spot welding is also known as resistance spot welding as it is one of the few welding procedure which generates fewer amounts of arc rays and fumes. As tongs and linkages are used, welders have to protect themselves for their own safety from the equipments that are kept around. Hence it is advisable to wear safety equipment before performing the welding activity.

When a welder performs spot welding he has to make sure that the current is flowing through the tip of the metals which are going to be joined. This process of welding is unique as you observe that the welded bead is formed inside the surface of base metal. This process of welding is different from a TIG or MIG spot welding.

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All about inverter welder:

Tuesday, September 21st, 2010

Inverter welders are the hot item on the body shop and inverter welders enable to use More power output from the same power supply. The inverter technology, on the other Hand, uses electronic components to produce higher frequencies into the transformer. These components give benefits such as lower weight, higher energy efficiency and most of all, it enables a higher control of the welding process. Repair of high crash performance cars designed with advanced high strength steel, needs Spot welders which can provide high quality welds. The inverter welder makes the welding much more convenient and you won’t need to use an industrial generator.

It also makes welding more efficient since the total power costs will be lower. As a bonus, an inverter welder is also more tolerant of dirty power from generators than conventional welders which can lead to fewer bad welds and less time per job. You can often carry one around like a light suitcase instead of rolling a heavy conventional unit. This also helps you get into smaller spaces where a conventional welder could be cumbersome or even impossible to fit. The inverter welders are dramatically smaller and consume low power.

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Spot Welding Hazards

Thursday, September 10th, 2009

Spot welding can cause fire

  • Keep a fire extinguisher near while working
  • Use correct circuit breakers
  • Flying sparks and hot metal may be dangerous. Protect yourself and others from these flammable materials.
  • Avoid spot welding in closed containers such as tanks or drums.
  • Before welding, see to it that you don’t have any matches in your pocket.
  • Do not exceed the equipment rated capacity.

Electric shock can kill:

  • Always wear dry, insulating gloves
  • Avoid touching live electrical parts
  • Turn off electrical equipment when not in use.
  • Always use well-maintained equipment. Repair or replace damaged parts at once.
  • Keep cords dry, free of oil and grease, and protected from hot metal and sparks.

Flying sparks can cause injury

  • Wear face shield or safety goggles with side shields
  • Wear protective garments like heavy shirt, high shoes, cap etc. Avoid wearing synthetic material.

Hot Metal can cause burns

  • Wear gloves while touching work piece, tips or tongs.
  • Allow tongs and tips to cool before touching.

Moving parts can cause injury

  • Keep away from moving parts and pinch points
  • Do not put hands between tips.

Fumes can be hazardous

  • Do not breathe the fumes
  • Always use respirator
  • Read the Material Safety Data Sheet (MSDS).
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What is Resistance Spot Welding?

Friday, June 26th, 2009

Spot welding means joining two or more metals parts together with the help of heat and pressure. It is considered one of the oldest welding processes. This type of welding can be used to weld thin or thick foils but cannot be used for above about 6 mm thickness. High quality welds can also be made in stainless steels, nickel alloys, aluminum alloys and titanium.

Resistance spot welding produces little fumes and very less arc rays. Danger of flying sparks is less when compared to other processes. But tongs and linkages can cause higher risk of mechanical hazards such as pinching and crushing the fingers and hands.

Resistance is the opposition that a substance offers to the flow of electric current. If the metal has lesser resistance, less heat is generated when current passes through it. The higher the resistance of a metal, the more heat is generated when the same current passes through it. If you want best results in resistance welding you should have a detailed understanding of the materials being welded, careful control of the heat and pressure at the weld point, and consideration of numerous other factors.

Benefits of Resistance Welding

  • High speed welding
  • Easily automated
  • Suitable for high rate production
  • Economical
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What can a Spot Welder Do?

Thursday, March 12th, 2009

A spot welder is a piece of machinery consisting of electrodes and what are typically called the tool holders, all used to weld or join parts together. The tool holder is an apparatus that keeps the electrodes in position while supporting the water hoses, used to cool down the electrodes. The electrodes are able  to withstand high heat being applied to them. They are the go-between for the material to be welded and the spot welder machinery. (more…)

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