Machine for automatically loading bar stock
OwnerGerald R. Savageinventor
Life of this patent
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Abstract
A machine for automatically loading elongated bars into an automatic screw machine. Each bar initially is advanced at a rapid rate and with relatively low force by a first fluid-operated actuator. When the leading end of the bar reaches the feed finger of the screw machine, a second fluid-operated actuator advances the bar at a slower speed and with relatively high force. A measuring device measures the distance through which the bar is advanced by the second actuator and automatically stops the advance when the leading end of the bar is located in a predetermined position.
Claims13
Apparatus for automatically loading elongated bars generally horizontally into the work holder of a machine tool, said apparatus comprising a main support having means for guiding a bar for lengthwise movement toward the work holder, a carriage mounted on said support for movement in first and second directions and operable when moved in said first direction to advance said bar along said guide means and toward said work holder, a first fluid-operated actuator for moving said carriage in said first direction through a first distance, a second fluid-operated actuator for thereafter moving said carriage in said first direction with a greater force and at a slower speed than said first actuator, and means for measuring displacement of said carriage in said first direction by said second actuator and for disabling said second actuator after said carriage has been moved through a second distance by said second actuator.
Apparatus for automatically loading elongated bars generally horizontally into the work holder of a machine tool, said apparatus comprising a main support having means for guiding a bar for lengthwise movement toward the work holder, a carriage movable on said support in first and second directions and operable when moved in said first direction to advance said bar along said guide means and toward said work holder, a first reciprocating fluid-operated actuator having a reciprocating member, flexible cable means connected to said reciprocating member and to said carriage whereby back and forth movement of said reciprocating member causes said cable means to pull said carriage in said first and second directions, said carriage being pulled in said first direction and through a first distance by said cable means when said reciprocating member is moved a predetermined distance in said second direction, a second fluid-operated actuator having a reciprocating rod, a pusher operably connected to said rod, said second actuator being operable, after said carriage has been moved through said first distance, to move said pusher into operative engagement with said carriage and to push said carriage in said first direction with greater force than exerted on said carriage by said first actuator and said cable means, and means for measuring displacement of said carriage in said first direction by said second actuator and for disabling said second actuator after the latter has pushed said carriage through a second distance.
Dependencies are inferred from the claim text.