On Pneumatic Spot Welding Machines

Posted on Jan 11, 2021

Pneumatic Spot Welding Machine

Pneumatic spot welding machine's electrodes, arms, and holders are provided with water-cooling positioning with hose interrelation. Its outlook is a totally enclosed configuration and has rubber protection for safer and easier operation.

Brief Introduction to Pneumatic Spot Welding Machine

A basic type of pneumatic spot welding machine is not a new or foreign concept for all of us. It is simply a spot welder with portable and pneumatic function. The pneumatic spot welding machine is perfectly suitable for a broad range of applications. It can be found both in small workshops and high production large factories. Pneumatic spot welding machine's electrodes, arms, and holders are provided with water-cooling positioning with hose interrelation. Its outlook is a totally enclosed configuration and has rubber protection for safer and easier operation.

Among its many features, high productivity can be accomplished with rational design, reduced dimensions, and also high welding capacity. Because of its broad selection of operational arms, rendering the spot welding machine can be installed under work exigencies. And it can be utilized on several applications: such as repairing jobs, kitchen-ware industry, repairs, and equipment assembly university workshops, fabrication, vehicle industry, sheet metal industry, furniture, and home kind application.
 

Spot Welding Machine

What is a spot welding machine? Spot welding machines (also known as spot welders) help provides a rapid and efficient approach to welding sheet metals while at the same time also comes with wire products, and by exerting separated weld spots in an effort to connect with wire parts or two sheet metals together. A spot welder employs a pair of electrodes comprising copper bars or simply welding electrodes. Heat is produced when contact of the workpieces is made and hence the fusion of the workpieces is initiated.

There are various kinds of spot welding devices, sometimes referred to as resistance spot welding systems, that are suitable for specific welding operations. Spot welding machines could be quite easily accessible, from transportable features to the permanent structure of the welder machine. The use usually depends upon the actual density and also the variety of steel to be spot-welded as well as the level of difficulty within the welding method. These welders are easy to control and are an efficient welding system for production and factory work.
 

:: Read More: How to Go about Spot Welding Stainless Steel?
 

What Does Spot Welding Do?

Spot welding demands the utilization of copper alloy electrodes to channel an electrical current into a small section between the metal surfaces so that they can be connected. The electrodes are engineered to generate pressure, which is responsible for securing the workpieces in position as well. While the copper alloy electrodes generate heat, the metal workpieces combine together in a controlled fashion. The moment the electrical current has stopped, the metal workpieces are then cooled off employing specific channels that cut through the pivot of the copper alloy electrodes.

A typical spot welding applies two copper alloy electrodes to hold the two pieces of metal together. It is a form of resistance welding. Spot welding is one of the oldest welding processes that two or more sheets of metal are welded together without the application of any filler material. It is the process by which two pieces or edges of the metal are fused together by means of heat. In this process, you create imbricating metal at specific intervals or extremities.

Spot welding has its name because it makes a splendid tidy round weld spot without any splashed spots. The amount of heat required during a spot welding process is solely depending on the sort of metals being connected together. The process involves exerting pressure and heat to the weld section utilizing shaped alloy copper electrodes, which transfer an electrical current through the weld pieces. The material then melts, combining the parts together at which point the current is shut down. The pressure from the electrodes is sustained and the molten nugget hardens to construct the joint.
 

Materials that Work for Spot Welding

Several types of materials can be fused by spot welding including metallic materials and wire mesh. Low carbon steel is employed more often than the high-carbon content variety because of its resilience to cracks. Steel possesses a higher electrical resistivity and lowers thermal conductivity than copper electrodes, making welding comparatively simple. Stainless steel welds are deemed less hard than mild steel welds and mixed steel welds.

Spot welding is less ideal to deal with metals such as aluminum and galvanized steel because it takes higher levels of electrical current to weld such materials. Nevertheless, even the best material can be difficult to weld if it is not of the appropriate thickness. Generally speaking, the sheets have to be at least three millimeters thick. In addition, they both have to be of identical size for ideal outcomes. On the contrary, if the sheets come from distinctive sizes, a three to one proportion should be sustained for a splendid weld.
 

Press Spot Welding Machine

A press spot welding machine is typically utilized as a part of metalworking operations because of its versatility. It is easily obtainable in the standard choice of throat depths, electrode forces as well as transformer capabilities.
 

Seam Welding

Seam welding may be conventionally utilized where rows of spot-welds are necessary or perhaps watertight joins are required. Uses for this kind of welding can include the development of flange welds, watertight joints designed for containers, drums, tin containers, as well as everyday radiators, etc.
 

Resistance Spot Welding

Resistance spot welding is a process where heat is generated at the areas to be welded by means of electrical resistance. An accurately controlled electrical current is passed through the surfaces of the workpieces with a certain level of pressure. The resistance in the title resistance spot welding stems from the truth that the withstanding of the workpieces and electrodes are employed in a mixture or the other way around to create heat at their junctions.
 

Advantages of Spot Welding

Spot welding provides tons of superiorities, among one of them is the capability to solidify the workpieces. It inclines to make the workpieces stronger simply because it utilizes heat to melt and combine the junctions of metal workpieces together.

Spot welding is a swift welding process as well. Based on what we can find on Wikipedia, the standard weld time for spot welding is just 0.01 to 0.63 seconds disparity. The weld time differs depending upon the density of the work-pieces just like other welding processes. Harder workpieces are prone to possess a lengthy weld time than fragile workpieces.
 

Disadvantages of Spot Welding

There are some potential disadvantages to spot welding. Even though spot welding can better the strength of the joined workpieces (at the sections where they are connected), it can make them bend as well. The section of the workpieces heated will fundamentally compress and eventually end in deformation. Spot welding isn't exceptionally captivating. It's easy to see where the two workpieces are connected together. The seams possess melted material that looks begrimed and displeasing.
 

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