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Tool-transfer-mechanism-for-machine-tools

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Tool transfer mechanism for machine tools

Details

Inventors: Jeske, Richard G.;
Assignee: Kearney & Trecker Corporation (West Allis, WI)
Primary Examiner: Makay; Albert J.
Assistant Examiner: Abraham; George F.
Attorney, Agent or Firm: Hajewski; Cyril M., Piggott; Donald J.

A tool transfer arm is pivotally mounted on a tool transfer housing which is movable between a tool storage magazine and the spindle of a machine tool to transfer tools between the tool storage magazine and the spindle. The tool transfer arm has two pair of toolholder jaws, one pair on each end thereof. One toolholder jaw of each pair is movable and the other jaw is fixed. Each movable jaw is pivotable between an open and closed position by a clamp arm which is pivotally connected to the corresponding movable jaw and slidably engages an arcuate guide slot in the tool transfer arm. A cylindrical abutment on the spindle head near the spindle and on the tool storage magazine bears against the adjacent clamp arm when the tool transfer arm approaches either the tool storage magazine or the spindle in one angular orientation to close the corresponding movable jaw and clamp a toolholder in the jaws for removal from the tool storage magazine or spindle. A conical abutment on the spindle head near the spindle and on the tool storage magazine bears against the adjacent clamp arm when the tool transfer arm approaches either the tool storage magazine or the spindle in the other angular orientation to open the corresponding movable jaw and release the toolholder clamped in the jaws for insertion into the tool storage magazine or spindle.

DETAILED DESCRIPTION An article transfer housing is movably mounted on a frame for movement into and out of proximity with an article storage magazine and an article support to transfer articles therebetween.
An article transfer arm is pivotally mounted on the article transfer housing and has a pair of article holder jaws on at least one end thereof.
One of the article holder jaws is fixed and the other is movable.
The movable article holder jaw is pivotally linked to a clamp arm which engages a guide surface on the article transfer arm and is movable between an open position which opens the movable jaw, and a closed position which closes the movable jaw.
A first abutment on the article support is positioned to bear against the clamp arm and move it from its open position to its closed position.
A second abutment on the article support is positioned to bear against the clamp arm and move it from its closed position to its open position.
A second pair of article holder jaws, which are identical in structure with the above-described article holder jaws, are preferably mounted on the other end of the article transfer arm.

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