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Fail-safe pneumatic swing clamps

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Fail-safe pneumatic swing clamps
In Roemheld's new pneumatic swing clamps, a mechanical lock ensures that the clamping force is maintained even when the pressure drops so that the workpiece remains safely in position.

Roemheld UK has introduced pneumatically actuated swing clamps incorporating a mechanical locking action, whereby the full holding force - between 200 and 600 N - is maintained in the case of air pressure reduction or loss, ensuring operator safety and avoiding the production of scrap. Operating pressure is between two and six bar.

The clamp is a pull-type cylinder with a piston that is automatically locked when the workpiece height is within the designated clamping range, after which the air line can be depressurised or uncoupled, for example during pallet change. For unclamping, which is monitored, only the minimum pneumatic pressure is needed.

A feature of the clamps is a pair of flow control valves that can be easily adjusted from above. They allow the speed of the sturdy swing mechanism to be reduced if the flow rate is too high or when the clamping arms are of larger mass. It also enables synchronisation or sequencing of the closure of several connected clamps. Swing angle is normally 90 degrees clockwise or counter-clockwise, although it can be 60 degrees, 45 degrees or absent (0 degrees).

If machining dry or with minimum quantity lubrication, the ingress of small particles can be prevented by the use of an additional wiper ring.

To find out more about Roemheld’s range of workholding and materials handling visit www.roemheld.co.uk or telephone 01462 459052.