Shrinking device for a toolholder
AssigneeHaimer GmbH
InventorsFranz Haimer, Josef Haimer, Wolfgang Kügle
Life of this patent
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Abstract
The invention relates to a shrinking device (1) for shrinking a rotary tool (5) into a central receiving opening of a toolholder (3) which holds said rotary tool (5) in a press fit. The device comprises an induction heating device (15, 18) for thermally expanding the toolholder (3) in the area of the receiving opening. A cooling device (51, 53) with at least one cooling collar (53) which can be placed on the toolholder (3), in physical contact with the same, and through which a liquid coolant can flow, is provided for cooling the receiving opening area of the toolholder. This liquid cooling considerably reduces the overall time span needed for the shrinking process.
Claims37
A shrinking arrangement for thermally expanding and cooling an accommodating portion (9) of a toolholder (3) which retains a rotary tool with a pressfit in a central accommodating opening (11) of the accommodating portion (9) and releases the rotary tool when the accommodating portion (9) is thermally expanded, the shrinking arrangement comprising:
- induction-heating means (15, 18) for thermally expanding the accommodating portion (9) in the region of the accommodating opening (11), said induction-heating means (15, 18) including an induction coil unit (15) adapted to enclose the accommodating portion (9);
- and
- cooling means (51,53) for cooling the accommodating portion (9) in the region of the accommodating opening (11), said cooling means (51, 53) including at least one cooling collar (53) adapted to be positioned on the accommodating portion (9) in contact therewith, the cooling collar (53) comprising channel means (77) for the passage of liquid coolant when cooling the cooling collar (53).
Dependencies are inferred from the claim text.