Electromagnetic chucks can contribute changeable keeping power, which greatly improves their potential to maintain a wide range of machining applications.
Magnetic chucks are designed for keeping ferro-metallic work pieces with a strong, uniform keeping force. They consist of an accurately centered permanent magnetic face that works in conjunction with an operator actuated permanent or electromagnet. The work piece closes the magnetic loop to originate a gather anchor for the work piece.
Permanent Magnet vs. Electromagnet
Both permanent magnets and electromagnets can be used to furnish a magnetic keeping force. The choice of a permanent or electromagnetic construct is dependent upon both machining applications and externalities. Since permanent magnets do not need electrical power, they are best used when there's no power ready or it is unreliable. On the other hand, the magnetic field of permanent magnetic chucks cannot be adjusted, which can be a drawback for machining applications that need changeable keeping power. In applications where a changeable keeping power is required, an electromagnetic chuck is the best solution.
Electromagnetic Chuck Operation
Electromagnetic chucks are constructed with electrical coils wound around a steel core embedded in the chuck. To energize the electromagnetic field, a chuck controller is used to originate a changeable Dc voltage in the chuck's coils. The coil's electromagnetic field causes particles within the ferro-metallic work pieces to be aligned in a coarse direction. This alignment creates the electromagnetic keeping force between the work piece and the chuck. The chuck's poles are magnetic as long as voltage is applied. The operator can adjust the controller's Dc voltage to vary the impel of the magnetic field, which, in turn, provides the changeable keeping force.
The changeable keeping Power Advantage
Variable keeping power greatly improves the chuck's potential to maintain a wide range of machining applications that comprise cutting, milling, shaping, Edm, high speed cutting operations and thin work for grinding. Electromagnetic chucks can easily be interfaced with motor centers for automation purposes.
Variable keeping power is considerable for thin work applications. For example, when a part to be machined is thin-0.25 inch or thinner-and the part is presented to a motor operator as one of a stack of similar parts, the piece must be lifted from the stack. Permanent magnets are not designed to lift only one piece from a stack of ferro-metallic parts. However, an electromagnet with changeable voltage operate allows the operator to decrease the magnetic impel to the point where only one piece at a time can be lifted from a stack of parts.
Shop Safety
The changeable keeping power of electromagnetic chucks give it an advantage over permanent magnetic chucks. But their choice depends both on the machining application and shop safety. Since electromagnets need constant power to operate, a power failure can introduce a employee safety concern. While uninterruptible power supplies, power conditioners and battery backup systems can be integrated into the machining operations to address these concerns, the extreme decision depends on the construct of a single machining application.
Electromagnetic Chucks: The changeable holding Power advantage
