TECNA COLUMN-TYPE ROCKER ARM SPOT WELDERS (4640N-4649N)

The TECNA column-type rocker arm, pedal-operated, and pneumatic resistance welders, series (4640N-4649N), offer a nominal power from 16 kVA to 25 kVA at 50% duty cycle in direct current, ensuring efficiency and reliability in welding processes.

The adjustable arm length provides greater operational flexibility, adapting to different production needs. The copper-chrome electrode holders, designed for heavy-duty use and long service life, can be mounted in both straight and inclined positions, while the welding electrode stroke is adjustable, allowing precise process control.

The welding transformer, encapsulated in epoxy resin, features water cooling for the transformer, arms, and electrodes, ensuring increased durability and operational stability. The system is managed by the TE101 microprocessor control unit, which monitors welding current and voltage, ensuring compliance with preset limits for consistent weld quality.

In pedal-operated welders, the electrode force is adjustable, and a micro-switch activates the welding cycle as soon as the preset value is reached. Additionally, the pedal is length-adjustable, improving operator ergonomics.

The pneumatic welders are equipped with a cylinder that operates without lubrication, eliminating the risk of oil mist emissions and ensuring a cleaner working environment. The electrode force is regulated via a filter-reducer unit with a pressure gauge, while a semi-automatic condensate discharge system enhances machine efficiency.

For optimized process control, these machines include adjustable electrode speed for opening and closing, an end-of-stroke damper, and exhaust silencers, reducing noise and vibrations during operation.

The two-stage electric pedal enables both single-cycle and automatic operation, ensuring that parts are clamped and welded only when properly positioned. Additionally, the machine is designed for the integration of a second two-stage electric pedal, allowing operators to recall two different time-current settings, a particularly useful function for performing different welds on the same workpiece.