Know The Working Of Spot Welding - PowerPoint PPT Presentation

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Know The Working Of Spot Welding


Spot welding is one of the most precise and cost-effective ways for combining metal, but it can just join metals that are no thicker than 3 millimeters. The current density determined by the diameter of the electrode that is in contact with the work piece. – PowerPoint PPT presentation

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Title: Know The Working Of Spot Welding

What Is Spot Welding Know Its Workings and
Introduction To Spot Welding
  • Spot welding is a commonly used method in the
    production sector, renowned for its capacity to
    effectively and accurately unite two metal
    components. Fundamentally, spot welding entails
    the founding of a robust connection between two
    metallic surfaces by the application of heat and
    pressure. The aforementioned process involves the
    application of a substantial electrical current
    to the metal components, resulting in
    resistance-induced heating at the specific
    location of contact. The thermal energy produced
    induces the liquefaction of the metal, afterwards
    undergoing a phase transition to solidify and
    establish a robust fusion joint.
  • Spot welding machines, often referred to as spot
    welders, are specialized apparatuses specifically
    designed for the purpose of executing the spot
    welding procedure. Welding systems include a
    power source responsible for generating the
    necessary electrical current for welding,
    together with a set of electrodes that facilitate
    the delivery of this current to the workpieces.

  • Spot welding machine manufacturers create a
    localized electric current that flows through the
    metal pieces, causing them to melt and fuse
    together, and then utilize this current to
    connect two or more pieces of metal together at
    precise areas, often known as "spots." This
    process may be used to join two or more pieces of
    metal together.

Know The Working Of Spot Welding
  • Spot welding machines have the capability to be
    operated either manually or in a completely
    automated manner, depending upon the specific
    application and production demands. Manual
    machines are often used in operations on a
    smaller scale or for the purpose of welding
    pieces that possess irregular shapes. These
    machines provide the operator a high degree of
    flexibility and control. In contrast, automated
    machines are often used in production settings
    characterized by large volume, providing
    advantages such as enhanced speed, precision, and
    the capacity to consistently reproduce results.
  • Copper, chromium, zirconium, and low-carbon steel
    are only some of the metals and alloys that may
    be used as electrodes in spot welding. Other
    options include titanium and nickel. Copper, on
    the other hand, is the most prevalent metal. The
    melting of the metal and the beginning of the
    fusion process is caused by the high voltage
    power supply combined with the intense pressure
    on the focused area. Because of the low
    electrical resistance, heat may be generated at
    the welding position more effectively than in the
    electrodes themselves.

The Principle Of Spot Welding
  • Resistance spot welding is a welding technique
    that utilizes electrical resistance to create
    heat at the interface of two metal sheets. The
    thermal energy produced as a result of the
    electrical current striking resistance causes the
    metal to undergo a phase change, resulting in the
    fusion of the two sheets at the point of contact.
    The aforementioned approach is often executed
    with a specialized welding apparatus, which
    exerts pressure on the sheets to secure their
    position and regulate the electrical current
    throughout the resistance welding process.
  • The application of the current is performed with
    deliberate control by means of the electrodes.
    The current density is determined by the diameter
    of the electrode that is in contact with the
    workpiece. The resistance of the contact area
    layers is directly influenced by the magnitude of
    the applied force. In practical applications, the
    force is manipulated in such a way that thermal
    energy is promptly created within the area of

Advantages and Applications of Spot Welding
  • Spot welding has the advantage of being a quick
    and efficient way to join two metal sheets
    together. The automation of the process enables
    the achievement of high production rates and
    ensures consistent weld quality. Therefore, it is
    a highly commendable option for utilization in
    settings where the preservation of air quality is
    a matter of importance.
  • Due to its cost-effectiveness, spot welding has
    gathered significant interest among Spot welding
    machine manufacturers.
  • In addition, the use of spot welding techniques
    generates a welding place that effectively avoids
    the incineration of undesired sections of
    workpieces, so guaranteeing the attainment of
    superior product quality. Spot welders are a very
    favorable option for firms seeking to optimize
    efficiency. The thickness of the plates is 1/4
    inch, and numerous thin plates are connected

Final Thought
  • Spot welding is one of the most precise and
    cost-effective methods for combining metal, but
    it can only join metals that are no thicker than
    3 millimeters. It combines the use of heat with
    the application of pressure. Electrodes are what
    apply both electricity and pressure to the spot
    where welding is taking place.

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