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Machining Accessories Gripper for flexible handling of ferromagnetic metals

Editor: Eric Culp

Electricity actuactes the units, the company says.

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Components are said to stay reliably gripped, even in the case of an emergency stop or a sudden power loss.
Components are said to stay reliably gripped, even in the case of an emergency stop or a sudden power loss.
(Source: Schunk)

Schunk has introduced the EGM magnetic gripper said to handle ferromagnetic workpieces without interfering contours. The supplier said that in contrast to most magnetic grippers currently available, the permanent magnets of the gripper are actuated electronically instead of pneumatically.

As only a short electrical pulse is required to activate and deactivate the EGM range, the gripper is very energy efficient, the company said. The gripper reportedly guarantees that components stay reliably gripped, even in the case of an emergency stop or a sudden power loss. The EGM can handle various workpieces without needing additional time or expenditure for set-up, change over of gripper fingers or incur restriction from interfering contours, the company explained.

The EGM is said to ensure that five sides of the workpiece are freely and easily accessible and meets the specifications of protection class IP52, which allows for the flexible loading of machine tools. The EGM is optionally available for handling flat components with pole sizes of 32 and 50, Schunk said. The gripper can also handle round components with a pole size of 30. Moreover, it can be equipped with two, four or eight poles. This makes it suitable for use with any current robot and corresponding application, according to the supplier.

The individually achieved holding forces of the magnetic grippers depend on the characteristics of the workpiece surface, taking into account the material type and the workpiece geometry.

Gripping forces are quoted at 1.2-22.5 kN under ideal conditions, depending on the gripper type. It is designed for maximum component weights of 147 kg. Activation/deactivation time is 300-350 ms.

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