Gebrueder Heller Maschinenfabrik Gmbh

Heller Maschinenfabrik Gmbh

Norbert Hiller

Erwin Deuschle

Heinz Vogel

Walter Horny

A machine tool has a spindle head pivotable through 180 degrees and having a spindle rotatably mounted in its housing. As a result of the pivoting movement, the spindle head can be shifted from a vertical to a horizontal working position. The spindle head has a toolholder and an axially displaceable tension rod. Through the tension rod runs a coolant bore extending into the working zone of the clamped tool. The coolant bore is connected to a line in a transfer piston displaceable in the spindle-head housing. The coolant bore and the transfer piston line are constantly in communication so that coolant flows uninterruptedly during displacement of the transfer piston. The line communicates with a coolant supply system. The coolant can be conveyed into the working zone of the tool in any position of the tool spindle and without any appreciable increase in size of the spindle head.

Machine tool with a spindle head

The gripping device has two gripping arms which are directly connected to one another in a pivotable manner about a common axis. A stop member is positioned in front of the pivot axis. Both gripping arms are pivotally connected to a piston rod of a piston-cylinder unit via toggle levers. The piston rod is displaceable relative to the pivot axis so that the gripping arms can be extended in a single displacement movement and pivoted into their gripping position.

Gripping device

The present machine tool is constructed for an automatic tool exchange and includes a double column (11, 12) in which a spindle unit (15) and a tool magazine (22) are separately guided for moving jointly. A grapple claw mechanism includes an angular double claw. These features satisfy the hitherto contradictory requirements for a minimal idle time for the tool exchange and for a high machining accuracy by the elimination, among others, of the positioning tolerance.

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Wendlingen, Germany

Norbert Hiller