Electromechanical actuators for robotic spot-welding

Electromechanical actuators for robotic spot-welding guns offer numerous advantages over conventional hydraulically or pneumatically driven systems, according to SKF Motion Technologies.

06/24/2004




SKF actuators easily integrate into robotic gun assemblies; require less space; and eliminate the complexities of hoses, valves, and compressed air or hydraulic oil.

Electromechanical actuators for robotic spot-welding guns offer numerous advantages over conventional hydraulically or pneumatically driven systems, according to SKF Motion Technologies . With controlled and precise motion, speed, force, and position, SKF's actuator systems are said to enable a spot-welding system to achieve an optimum number of welds quickly, reliably, cleanly, economically, and with reproducible quality.

A complete SKF actuator system includes Compact Electro-Mechanical Cylinders —40% smaller than conventional cylinders and achieving added control/performance from the roller screw design; a modular ServoMove System that uses ball screws and brushless dc motors to enhance repetitive-motion performance; and a robust Equalizer that promotes fast movement and positioning.

These actuators also simplify monitoring and diagnostics, run quietly, while offering more control, longer life, and high duty cycles. To suit specific application requirements, they facilitate:

  • Programmable stroke control to reduce cycle times;

  • Electrode pressure control to maintain stable pressure; and

  • Electrode position correction to automatically compensate for gun-tip wear.

Typical applications are in automotive, appliance, metalworking, and related industries.

—Frank J. Bartos, executive editor, Control Engineering, fbartos@reedbusiness.com





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