Resistance Welding Machine

The joint form is usually the first factor in machine selection. Individual weld points, projections and continuous seams require different equipment structures and tooling.

This table provides an initial direction. Final equipment selection should be confirmed using the actual workpiece, production material and acceptance criteria.

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Automotive Parts and Metal Stampings

Resistance welding is used for brackets, hinges, seat components, nuts, bolts, heat shields and other stamped or formed metal parts.

Automotive production often requires more than a standard welding machine. The system may also need:

• Automatic nut or bolt feeding
• Accurate part positioning
• Several welds in one loading cycle
• Stable tooling under repeated pressure
• Quick model changeover
• Weld monitoring
• Integration with an existing production line

The correct solution depends on the workpiece design and the customer’s production sequence.

Battery and Energy Storage Components

Selected battery and energy storage parts use spot or projection welding for terminals, conductive contacts, brackets, enclosures and supporting structures.

Machine selection should consider:

• Electrical and thermal conductivity
• Material thickness
• Required joint strength
• Permitted heat input
• Surface marking
• Electrical performance after welding
• Weld inspection method

Large stacks of copper or aluminium foil are normally evaluated separately because they may require a diffusion welding process rather than conventional resistance spot welding.

Low-Voltage Electrical Equipment

Switchgear, circuit breakers and electrical cabinets contain different types of conductive and structural components. These may include contacts, terminals, brackets, metal enclosures, copper conductors and braided connections.

A single electrical assembly may require more than one joining process. Spot or projection welding may be used for contacts, terminals and structural parts, while flexible copper busbars may require diffusion welding.

The material combination and required electrical performance should be confirmed before choosing the equipment.

Household Appliance Components

Spot, projection and seam welding are used for selected sheet-metal housings, brackets, frames, handles and internal components in household appliance production.

Typical project requirements include:

• Dedicated fixture positioning
• Multi-point welding
• Nut and fastener feeding
• Controlled surface appearance
• Compatibility with different part sizes
• Automatic loading and unloading

Applications may include parts for range hoods, dishwashers, heat exchangers and other metal appliance assemblies.

Tanks, Pipes and Sealed Components

Resistance seam welding can be used for fuel tanks, metal containers, cylindrical shells, corrugated pipes and other overlapping sheet-metal joints.For these applications, the equipment must be selected according to:

• Straight or circumferential weld path
• Workpiece diameter
• Overlap width
• Sheet thickness
• Welding speed
• Wheel electrode direction
• Surface appearance
• Required leakage test

A sample weld should be tested using the actual production material before the final tooling is confirmed.

Refrigeration and Compressor Components

Compressor shells, terminals, tubes, mounting parts and related components may require spot, projection or seam welding.

The main considerations are joint position, sealing requirements, dimensional control and whether the part can be reached by both electrodes. Dedicated tooling is normally required to hold the component during welding.

Resistance welding can be applied to many conductive metals, but the same machine settings cannot be used for every material or joint.

The correct process should be chosen according to the joint—not according to which machine has the highest capacity.

• Resistance welding is generally selected when the workpiece can be clamped between electrodes and the joint can be formed through controlled current, time and force.
• Diffusion welding is usually a better direction for large-area flexible copper or aluminium connections. Ultrasonic welding may be considered for thin foils, wires and small conductive joints.

Wuxi Haifei Intelligent Equipment Co., Limited is well-known as one of the leading resistance welding machine manufacturers and suppliers in China. Please rest assured to buy high quality resistance welding machine made in China here from our factory. For price consultation, contact us.