This Stationary Spot (Projection) Welding Machine is a precision joining solution designed for the automotive industry, particularly for projection welding of aluminum components to fasteners like nuts and bolts. It can function as a standalone manual operation unit or be seamlessly integrated into CNC automated production lines for high-precision, efficient welding. Its core capability includes high-quality welding of aluminum alloy, low-carbon steel, stainless steel sheets, and reliable joining between sheets and standard fasteners. It is a professional choice for enhancing automation and weld consistency in automotive parts manufacturing.Automotive Cnc Resistance Fixed Type Stationary Spot Welder Nut Spot Welding Machine For Aluminium

Fixed point projection spot welding machine is mainly used for welding plates of low-carbon steel, stainless steel, aluminum alloy and some non-ferrous metals, as well as projection welding between plates and nuts and bolts.

1. Automotive-Oriented Process Design

   The machine’s design and parameter settings are tailored to meet the automotive industry's demands for strength, consistency, and lightweighting (via aluminum use). Optimized for demanding processes like nut projection welding, it ensures weld quality meets automotive-grade standards.

2. Precise & Adjustable Pressure & Positioning

   • Accurate Pneumatic Control: The upper electrode is pneumatically actuated for convenient and precise force adjustment. A dedicated air reservoir stabilizes welding pressure output, ensuring consistency for each weld.

   • Flexible Stroke Adjustment: The upper electrode moves vertically with smoothly adjustable working and auxiliary strokes. The lower electrode height is finely adjustable vertically for quick, precise alignment of nuts to aluminum sheets.

3. High-Speed & Stable Actuation

   • Fast Response: A direct-acting solenoid valve significantly improves system response and electrode cycling speed while reducing air consumption, matching high-efficiency production rhythms.

   • Cushioned Motion: Independently adjustable descent/ascent speeds of the pressure head effectively cushion impact on aluminum workpieces, protecting surfaces and reducing operational noise.

4. Reliable & Durable Hardware

   • Stable Electrical Insulation: The upper-insulated secondary circuit provides stable, reliable insulation, allowing safe operation in various installation setups without short-circuit concerns.

   • Powerful Water-Cooled Source: The main circuit utilizes a water-cooled, high-power thyristor rectifier module, delivering robust, stable, and reliable output. Combined with an efficient cooling system, it supports continuous, high-duty-cycle operation.

   • Visual Cooling System: All waterway components are made of corrosion-resistant copper and stainless steel. A visual flow indicator enables easy real-time monitoring of coolant status, simplifying maintenance.

5. Man-Machine Collaboration & Automation Integration

   Operation via foot switch enables high productivity with low operator fatigue. Its standardized electrical interfaces and stable mechanical structure allow for easy integration with CNC systems, robots, or conveyors for automated welding.

6. Optimized Aluminum Welding Process

   Addressing the high conductivity and oxidization tendency of aluminum alloys, the machine enables precise control of current, time, and pressure parameters. This effectively minimizes spatter and distortion, producing dense, aesthetically sound weld nuggets.

The Upper Electrode

The Pressure Component

Gas Storage Tank

Waterway Components

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