Process and device for clamping tools in a clamping chuck
AssigneeFX Marquart GmbH
InventorUwe Marquart
Life of this patent
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Abstract
The invention indicates a device and a process for clamping tools in a clamping chuck which possesses a shrinkage segment (14) to receive the tool, with a heating apparatus (26), preferably designed as a gas burner, being associated with the shrinkage segment (14). The tool is clamped in the clamping chuck (20) with a press fit in the shrinkage seat, resulting in especially high clamping force. To prevent local overheating of the clamping chuck (20) and achieve complete insertion of the tool shaft into the thermally expanded shrinkage segment (14) of the clamping chuck (20), a receiving apparatus (40)--by means of which, for clamping purposes, the tool can be elastically pressed in the axial direction against the shrinkage segment (14)--is provided to receive the tool.
Claims24
Device for clamping tools in a clamping chuck having a shrinkage segment for clamping a tool with a shrinkage fit, said device comprising:
- a heating means for heating said shrinkage segment;
- a receiving means, arranged adjacent said shrinkage segment and in axial alignment therewith, for holding said tool prior to clamping within said shrinkage segment of said clamping chuck and for receiving said tool upon unclamping from said shrinkage segment;
- and
- biasing means for bracing said receiving means against said shrinkage segment
- and for shifting said tool axially from said receiving means into said shrinkage segment when said shrinkage segment has expanded enough to receive said tool.
Process for clamping a tool in a shrinkage segment of a clamping chuck in a shrinkage fit comprising the steps of holding said tool in axial alignment with said shrinkage segment;
- bracing said tool against said shrinkage segment with a biasing force while said shrinkage segment is heated until said shrinkage segment has expanded sufficiently so that said tool is shifted axially into said shrinkage segment under the action of the biasing force, to effect clamping of said tool in said shrinkage segment upon cooling thereof.
Dependencies are inferred from the claim text.