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High-thrust servo welding actuator

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article image SW Series servo welding actuator.

TOL-O-MATIC, represented by Pneumatic Products , has announced the SW Series servo welding actuator - a patented new design that offers compact design, significantly extended service life and zero maintenance.

Available in high performance roller screw or a ball screw models, the SW Series actuator features rated life at weld force exceeding 10 million cycles for the roller screw and 5 million for the ball screw when side loading is within specification. In many applications, service life can exceed these levels.

The SW Series actuators incorporate an 8-pole Nd-Fe-B hollow core rotor with skewed stator laminations that provides low cogging torque. This design results in superior force repeatability of ±3.0% over millions of weld cycles, with actual field results to ±1.5%, independent of position. The design also results in greatly improved weld quality, offering weld force up to 2,500 pounds (11.12kN) and peak force of 4,400 pounds (19.57kN).

The SW Actuator's integral anti-rotation feature reduces weld gun costs and envelope dimensions. The compact design, built on a 4.4" face (111.76mm) and weighing 31 pounds (14.06 kilograms), is ideal for robotic, fixture and hand-gun welding, as well as pneumatic cylinder retrofitting.

With a standard 6" stroke (152.4mm), the OAL of the SW is less than 15" (381mm), not including any feedback device. SW is available in low (325V dc) and high voltage (680V dc) models.

Designed for zero maintenance during the length of its service life, the SW Actuator is lubed and sealed. It requires no water or forced cooling, and features manual override and bumpers for hard-over situations with no special tools needed.

Users of the actuator may choose to operate the device through the 7th axis in a robot or with a weld controller. For easy system integration, the TOL-O-MATIC SW actuator supports feedback options and interfaces with all major robot and weld controller suppliers.

In addition, the company offers a WeldAxis controller that supports the use of the SW servo and incorporates a controller + PLC + drive for optimum force and repeatability control.

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