To turn the magnetic holding
force off and on, Electro-permanent magnetic chucks only need electrical power.
This means thereby minimizing heat build-up, the chuck runs power consumption and
cold parts distortion.
Undesirable effects such as
rework due to thermal parts distortion and an increase in rejected parts as
well as an increase in scrap are produced by heat buildup during machining
processes. To an increase in material costs and cycle time, this all adds up
and in tool life, a decrease. To counter these undesirable effects in two ways,
Electro-permanent magnetic chuck has
the ability.
Basics of Magnetic Chucks
Three basic types of magnetic
chucks are there: electro-permanent, electro-magnetic and permanent magnetic. On
the magnetism created by permanent magnets, the permanent magnetic chuck is
based and to operate, they do not require electrical power making them
failsafe, but variable holding power capability is not available with them.
Around the chuck's pole pieces, Electromagnetic
chucks use a controller to generate a D.C. voltage in a coil wound to create
the magnetic work holding force. But to operate, continuous electrical power is
required in electro-magnetic chucks. Features of both permanent magnetic and
electro-magnetic chucks in MagneticWelding Holder are combined in Electro-permanent magnetic chucks.
Hybridizing The Magnetic Circuit with Electro-permanent
A hybrid of the electromagnetic
and permanent chuck types are Electro-permanent magnetic chucks. With a coil
wound around permanent magnetic material embedded in the chuck plate, they are
constructed. The magnetic material is charged When a DC voltage is applied,
which even after power is removed binds the work piece to the chuck and takes
about 1 second.
Controlling the amount of
magnetic force of the chuck is another function of the coil and Magnetic Filter Rod to give it a
variable holding power capability similar to electromagnetic chucks.
Even when power is removed, these
chucks will remain magnetic. Since without the consumption of electrical power,
they maintain their magnetic holding force the energy efficiency of the process
is increased by these chucks, which minimizes costs to the entire enterprise.
They can be used with boring machines, electric processing machine tools, as
well as in surface grinders, drilling, casting and planning.
