Evaluating Machining Applications For Magnetic Chuck Workholding

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There various components to think about when selecting the type of magnetic chuck for a machining application.

As an option to mechanical clamping of work-pieces, magnetic chucks are excellent for holding ferromagnetic work-pieces with each other. They're generally used in grinding, milling, spark erosion and pallet-loading applications.

Magnetic chucks consist of an accurately centered permanent magnet face. Fixed pole pieces are brought into make contact with with electromagnets or permanent magnets. ´╗┐more help The work-piece to become held closes the magnetic loop or path, onto those fixed plates, delivering a safe anchor for the work-piece.

To reap the advantages, many factors have to be thought of to adequately marry the magnetic chuck towards the application.

Magnetic Chuck Application Considerations

There a variety of variables that have to be deemed, like:

Kind of Material: Magnetic chucks only function with materials that have an capability to be magnetized. Paramagnetic or diamagnetic materials don't magnetize well if at all and will not be great candidates for magnetic chuck workholding. Material hardness, shape and flatness of your work-piece material are also a part of the material evaluation approach.

Sort of Machining: Machines and form of machining are essential considerations for the collection of a magnetic chuck. Factors like the horsepower, spindle speed, and size of cutter or tool need to be viewed as.

Surface Location: Magnetic holding force is straight proportional towards the surface location. Smaller sized parts which have less out there make contact with area may possibly require constructive stops to overcome the forces from the machine. Irregularly shaped parts might need a magnetic fixture to securely hold the work-piece.

Chip Control: Chips are usually not an issue for magnetic workholding mainly because the chuck's magnetic field will not cause chips to adhere to the work-piece. Nevertheless, if chip issues take place, they will be alleviated by utilizing variable manage choices to lower the quantity of force applied or by using riser blocks to help keep the magnetic circuit away from the machining region. In other words, the chuck might be created to limit the depth on the magnetic field, preventing the force from pulling chips in to the work-piece.

Variety of Magnet: There are actually three sorts of magnetic circuits utilised with magnetic chucks: permanent-magnetic, electromagnetic and electro-permanent. Permanent-magnetic chucks are mechanically actuated through a lever and possess a non-variable clamping force. Electromagnetic chucks use DC voltage inside a coil surrounding mild-steel pole pieces to produce the magnetic field; they require continual energy application. But they can deliver variable holding power, which drastically improves their capability to support a wide range of machining conditions. Electro-permanent chucks are a permanent/electromagnet hybrid. In this design, when DC voltage is applied for the coil that surrounds the permanent magnet, the material is charged and becomes magnetic. Electro-permanent magnets is not going to drop magnetic attraction if there's a energy loss, which tends to make them transportable.