Spot Welding Machine Guide

Spot welding machine is a type of resistance welding process that is used mainly for welding two or more metal sheets together by applying pressure and heat to the weld area. This type of spot welders contains a certain specifications of its own with the equipment. Spot welders typically delivers current for 0.1 seconds or less, so the current of spot welders must be extremely high, and spot welding equipment typically deliver 150 amps per phase draw on a 440-volt system. For onsite operators, the welding equipment such as the guns of spot welders are difficult to handle manually for them, because that equipment can be very heavy and often requiring great strength. This heavy duty makes spot welding very dangerous in the manufacturing sites. Furthermore, high amounts of heat and current emitted by spot welders are involved in the spot welding process, and the spot welders are constantly around hazardous sparks and welding fumes. Workers of spot welders shall be very careful to the equipment as well as the surrounding environment to protect themselves from potential menaces.

Welding and Inventory

There are a broad series of welding machines (welders) within the welding machine inventory. The spot welding machines are popular equipment that has been developed for a long time that develops a series of their own kinds across very wide applications in the industry, such as flash butt welding machines (flash butt welder), grating welding machines (grating welder), and other types of similar welder equipment. In the present article, we will take a look at those welding machines besides the spot welders and their features one by one, helping readers know about this welder equipment.

Projection Welding Machine

Inside the spot welding machine, here we introduce the projection welding machine at the very first, because this welder belongs to the spot welding machine and is very popular in the industry. In the welding sector, projection welding machine is also called projection welder, which is considered a modification of spot welders. During the projection welding process, the weld is localized by means of projections on one or both of the work pieces to be joined. The heat is concentrated at the projections. This permits the welding of heavier sections of welds. The projections can also serve as a means of positioning the work pieces of the welders. Projection welding is often used to weld studs, nuts, and other threaded machine parts to metal plates. It is a productive method among welder models.

A resistance spot welder is welding machinery by the process in which contacting metal surface points are joined by the heat obtained from resistance to the electric current. The works by spot welder is recognized as a subset of electric resistance welding. During the process, work pieces of spot welders are clamped together under the pressure exerted by the electrodes. Usually, the sheets are within a certain range, ranging from 0.5 to 3 mm thickness. The cost of this method is reasonable, so that is why the resistance spot welding emitted by spot welders is so widely applied.

Seam Welding Machines

In the metal welding field, resistance seam welding machine is a welding machine in which the process produces a weld at the connecting surfaces of two similar metals. During the process, the seam may be a butt joint and is an automated process. It is different from flash welding in that flash welding welds the entire joint at once while seam welding forms the weld progressively and starts at one end.

Flash butt welding is a very useful welding method. The flash butt welding machine is an electrical resistance welding processes designed on a welding machine that is utilized for joining components. During the process, the energy transfer is offered primarily by the resistance heat from the parts themselves. The parts and components are positioned end to end across the full joint areas. A range of section sizes and complex shapes can be con-joined through this machine. During the welding, the parts are clamped and brought together slowly while a flashing voltage is applied. Though the process can be manually achieved, most welding machines today are automatic for the purpose of improved accuracy including spot welders.


Welding is a fabrication process that joins metal materials by using high heat to melt the parts together and allowing them to cool causing fusion. Welding is distinct from lower temperature metal-joining techniques such as soldering and brazing. In addition to melting the base metal, a filler material is typically added to the joint to form a pool of molten material that cools to form a joint that is based on weld configuration. It can be stronger than the base material. Spot welders can do a series of exquisite works that help solidify the spots being welded. This is the reason why spot welders are widely used to weld various spots across the applications.

Automatic welding machine is automated welding process controlled by computer programs to conduct the welding procedures by which human worker don’t need to do simple manual operation in certain specific details and processes. This renders a more stable working process with less reliance on human power, which reduces the cost of human workers and the participations of manual operation. It is anticipated that with the automation to be advanced in the future, such model of welding process can be improved much and obtain more productivity. At the same time, the working safety will be improved as well with the growth of automation procedure. All the spots targeted by spot welders are to be calculated and estimated for automation programming so that it is possible in the future workers of spot welders would experience much better safety circumstances.

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