Posts Tagged ‘spot welder’

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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