Apeiwtes AWS Technology Center
Apeiwtes AWS Technology Center
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Services For Autoconer Machines

Offering you a complete choice of services which include spot welding machine sale services.


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Approx. Price: Rs 55,000 / PER MACHINEGet Latest Price

Service Details:

Type Of Welding MachineArc Welding
Service Typespot welding machine
Issuespot welding machine.
Country of OriginMade in India


Resistance Spot Welding is the joining of overlapping pieces of metal by applying pressure and electrical current. These joints created by resistance spot welding form a “button” or “fused nugget.” Resistance spot welds are found typically on flanges, staggered in a single row of consecutive welds. Vehicle manufacturers use resistance spot welding in the factory because they can produce high quality welds at a very low cost.

How a Spot Weld is formed. Spot welds are formed when a large amount of current is passed through the panels for the correct amount of time and with the correct amount of pressure. In a typical spot welding application there are two electrodes, opposite each other, which squeeze the metal pieces together. This squeezing pressure is controlled. The pieces to be welded are heated by passing welding current through them. Several thousand amperes of welding current are applied for a specified period of time. As the temperature is elevated, the metal is heated to a plastic state. The force of the welding tip will deform the metal and form a small dent as the metal gets hot. As the heat builds in the metal, a small liquid pool of metal is formed at the interface. This pool is typically the same size as the face of the welding tip. When welding temperature is reached, the timer should expire. The weld zone cools very quickly because the copper welding tips pull heat out of the weld zone. Heat also escapes as it flows into the surrounding metal. The TITE-SPOT Welding Pliers should be held closed for at least one second to cool the weld. WARNING: Care must be taken with an air closed apparatus that instantly releases after the weld is formed.

There are 4 variables to consider with resistance spot welding;

PressureWeld TimeCurrent, and Tip Diameter.

Pressure: the amount of pressure that is applied to the weld is important. If too little pressure is applied, the joining area will be small and weak. If too much pressure is applied, then cracking can occur in the weld because of the quenching effect of the welding tips. Also, high pressure can cause thinning of the metal and cause a weakness. The depth of depression on the sheet surfaces caused by welding electrodes should never exceed 25 percent of the sheet metal thickness.

Typically a body shop welds steel between 16 gauge and 24 gauge. If a spot welder has adjustable length tongs, a pressure gauge should be used to properly set the pressure. The pressure is important and should not be guessed at. (NOTE: The pressure of the TITE-SPOT Pliers is set to the middle of this range and is not adjustable.)

Three types of spot welding timers:

A standard weld timer controls the amount of time the current flows into the welding transformer. The inherent problem is that if welding is not taking place the timer is still ticking. Therefore, if welding current is only flowing for part of the cycle, a weld may not be formed before the timer runs out. What generally happens is, the technician increases the length of time the timer will run. This can cause overheating of the welding tools and transformer! Double cycling on the weld zone is also a technique which is used, but it also causes overheating.

Manual control: Sometimes the timer is bypassed by the operator and he times the welds manually. Good welds can be produced in 1/2 to 1 3/4 seconds this way. This probably puts less thermal stress on the welding tools and transformer than the “standard weld timer”.

A digital timer control verifies welding is taking place. This type of timer checks all cycles of a 60 cycle second and will not increment the timer unless welding current is flowing! The Digital timer has a precise interface.

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