Will the workpiece fall off after the electro-permanent magnet fixture is de-energized?

Electromagnetic clamping fixtures typically do not allow workpieces to fall off after power is disconnected. This is due to the combination of the characteristics of electromagnets and permanent magnets in these fixtures. When powered on, the magnetic field generated by the electromagnet assists or enhances the attractive force of the permanent magnet, allowing the fixture to securely hold the workpiece. Upon power-off, although the magnetic field of the electromagnet disappears, the permanent magnet retains its inherent magnetism, thus continuing to provide sufficient adhesive force to prevent the workpiece from falling off.

However, it is important to note that while electromagnetic clamping devices have an automatic locking function after power failure, meaning the workpiece will not immediately fall off due to power loss, their clamping force can be affected by various factors such as the material, shape, size of the workpiece, and the design and service life of the clamp. Therefore, in actual applications, regular inspections and maintenance of electromagnetic clamping devices are still necessary to ensure the safety of the workpiece and the accuracy of processing, as well as their stability and reliability during operation.

Additionally, it is crucial to strictly adhere to the manufacturer's instructions and safety operating procedures when operating electromagnetic clamping devices to ensure the safety of personnel and equipment.