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Expanding clamping device

A technology of expansion and contraction and fixture, which is applied in the direction of chuck, sleeve/socket connection, pipe/pipe joint/pipe fitting, etc., and can solve problems such as complex sealing measures

Inactive Publication Date: 2006-12-06
SCHUNK GMBH & CO KG SPANN UND GREIFTECHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this entails the disadvantage that complex sealing measures have to be used in order to prevent leakage of the pressure medium due to in part very high operating pressures

Method used

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Examples

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Embodiment Construction

[0015] figure 1 A longitudinal sectional view of an embodiment of an expandable chuck 1 in the form of a high-angle conical toolholder according to the invention is shown. The expandable chuck 1 comprises a base body 2 made of rigid material which, on the left side in the figure, has at its end a connection cone 3 in a known manner for clamping to a rotationally driven on the working spindle. On the other axial end of the base body 2, a thin-walled expansion sleeve 4 is provided, which is here integrally formed with the base body 2, but alternatively, the expansion sleeve The cartridge 4 can also be a separate component, which is connected to said base body 2 in a firm manner. The expansion sleeve 4 forms a central socket 5 into which a cylindrical shaft of a tool such as a drill bit or a cutter to be clamped can be inserted.

[0016] The expansion sleeve 4 is surrounded by a tensioning ring 6 in the form of a stop nut, which is screwed onto the base body 2 on its axial end...

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Abstract

The invention relates to an expansion chuck comprising a base (2), a thin-walled expansion sleeve (4) that is disposed in a final axial zone of the base (2) and forms a central seat (5) for a component that is to be clamped, and a clamping ring (6) which surrounds the expansion sleeve (4) so as to form an intermediate annular pressure chamber (7) and is screwed to the base (2). Said pressure chamber (7) is filled with a hydraulic means (11) while the expansion sleeve (4) can be elastically deformed for fixing a component within the seat (5) by axially displacing the clamping ring (6), said clamping ring (6) being twisted in relation to the base (2) such that the volume of the pressure chamber decreases. The inventive expansion chuck is characterized in that the pressure chamber (7) is filled with an elastic solid body (11) as a hydraulic means while a sliding ring element (12) is placed between the elastic solid body (11) and a pressure surface (6a) of the clamping ring (6) in order to transmit an axial compressive force from the clamping ring (6) to the solid body (11).

Description

technical field [0001] The invention relates to an expanding clamping device, which has: a base; a thin-walled expansion sleeve arranged on the axial end of the base and formed for clamping a central socket of a tight workpiece; and a tensioning ring that surrounds the expansion sleeve to form an annular pressure chamber therebetween and is screwed to the base body, wherein the pressure chamber is filled with a pressure medium, the The expansion sleeve is elastically deformable in order to fix the workpiece in the socket by rotating the tensioning ring relative to the base body thereby moving it axially, thereby reducing the volume of the pressure chamber. Background technique [0002] Expanding and contracting clamps of this type are known and used in practice for fixing tools such as milling cutters or drills to the work spindle of a corresponding machine tool. For this, the shaft of the tool to be clamped is inserted into the socket of the expansion chuck, and the tensio...

Claims

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Application Information

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IPC IPC(8): B23B31/30
CPCB23B31/305Y10T279/1029B23B31/10
Inventor 托马斯·雷茨巴赫安德烈亚斯·舒斯特赖纳·西格蒙德
Owner SCHUNK GMBH & CO KG SPANN UND GREIFTECHN
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