Patent ID: 6168221
Filing Date: 2001-01-02
Classification: B25B,B25J

Abstract:
A magnetic pick-up device for extracting magnetically permeable work pieces from a stamping die, comprising: an elongated housing having a central axis; an air-operated cylinder means located on said housing, said cylinder means having a movement axis that is coincident with the housing central axis; said air-operated cylinder means comprising a cylindrical chamber means, a piston slidably disposed within said chamber means for movement along said movement axis, and a piston rod located on said movement axis; said piston rod extending from said piston out of said cylindrical chamber means into said housing; said piston subdividing said cylindrical chamber means into a first air chamber proximate to said housing and a second air chamber remote from said housing; said cylindrical chamber means having a diameter that is appreciably greater than the axial dimension of said chamber means; two magnet holders located within said housing in symmetrical relation to the housing central axis; a transverse pivot means pivotably supporting each said magnet holder for swinging motion around an axis that is transverse to the housing central axis; said magnet holders having adjacent ends thereof pivotably connected to said piston rod, whereby movement of the piston rod produces simultaneous swinging motions of the magnet holders; a permanent magnet carried by each magnet holder; each said magnet having a flat pick-up surface adapted to exert a magnetic lifting force on a work piece, whereby the work piece can be removed from a stamping die; said magnet holders being swingable between operating positions wherein the magnet pick-up surfaces are aligned in a plane transverse to the housing central axis, and retracted positions wherein the magnet pick-up surfaces are angled away from the housing central axis; each magnet pick-up surface being angled at a relatively small acute angle to said transverse plane during initial movement of the respective magnet from its operating position.