Spot welding services at affordable prices
Our spot welders can be helpful when an item must be welded in a tight space or when there are many intricate obstructions like wires or rivets. The coaxial impact hammer drives down with enough force to fuse two materials together, but unlike other kinds of welding, the process is smaller and less noticeable in its application.
How can you tell if you need Mig welding or TIG welding? What do the different types of welding look like when they’re completed? When should you consider spot welding? The good news is, the friendly team at BLV Engineering are happy to answer questions for you and ensure your project turns out exactly as you need it.
Our Metal Workshop also offers these services…
Polishing
Metal polishing designed to deliver those beautiful smooth surfaces.
Galvanising
Zinc galvanisation to protect your steel from corrosion and rust.
Powder coating
Powder coating to improve uniformity, durability & appearance.
What is the spot welding process?
Spot welding is a process of welding that joins two pieces of metal by heating them to a point where they melt and then pressing them together. The two pieces are then held together until the weld cools. This type of welding is often used in the automotive industry to join body panels together.
A machine will use compressed air to direct arcing onto two materials at high speeds (obtaining temperatures up to 5000°F). Once this has occurred, the hammer hits down on two materials in a way that the surfaces are forced together. To have an efficient welding process, it is important to select the appropriate weld bead type for your project.
Two shaped copper alloy electrodes are used in the process in order to concentrate welding current into a small “spot” while also clamping the sheets together. Work-pieces are held together under pressure exerted by electrodes until they reach the desired shape.
Spot welding involves three steps; the first is when electrodes are placed against the surface of the metal and a small amount of pressure is applied. After, current from the electrodes runs through for a brief moment before being removed, but they remain in place while it cools. Welding times can depend on various thicknesses of metals, electrode forcefulness, and diameter capability.
Spot welding applications
Spot welding is a great way to weld thinner pieces of sheet metal, welded wire mesh or regular wire mesh. If the stock is too thick, it becomes increasingly difficult to spot weld because the heat will flow into and affect the surrounding areas more easily. Many items made of sheet metal, like buckets, have spot welding. Aluminium alloys can be spot welded, but their higher thermal and electrical conductivity requires more welding current. More expensive and powerful welding transformers are required for this.
In the automobile industry, spot welding is most commonly used to weld sheet metal and create a car’s frame. In addition to being automated, many industrial robots found on factory floors are spot welders.
Is spot welding stronger than MIG welding?
While Spot Welding, a specific type of Resistance Welding, excels in precision tasks involving Metal Sheets, its Weld Strength is generally lower than that of MIG welding. This characteristic makes spot welding particularly effective in Industrial Manufacturing and Metal Fabrication, where precision is often favored over sheer strength.
However, when it comes to handling high loads or stress, spot welds might be at a disadvantage compared to MIG welds. Despite this, a skilled Spot Welder Operator using the correct Welding Parameters and Spot Welding Techniques can mitigate this issue. Employing modern Welding Machines and Tungsten Electrodes also allows for enhanced control over the process, thereby reducing potential weld imperfections.
One crucial factor to keep in mind is that spot welding might struggle with thicker materials due to their high heat resistance. However, innovative technologies such as Welding Robots and state-of-the-art Spot Welding Equipment have been known to overcome this challenge.
A thorough approach to Welding Safety, which includes proper Fume Extraction systems and meticulous Weld Inspection, can further improve the quality and reliability of spot welds. Moreover, comprehensive Welding Training allows one to master the art of spot welding, an intricate process involving a delicate balance of pressure, current, and time.
Lastly, it’s important to remember that the welding domain extends beyond spot welding, encompassing a variety of other techniques like Soldering, Brazing, Projection Welding, and Seam Welding. Despite the difference in Weld Strength, each welding process, including spot welding, has its own unique strengths and applications
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