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US 12,440,904 B2Granted
Expansion clamping device and method of making same
AssigneeKlaus Raiser GmbH & Co. KG
InventorThomas Retzbach
Life of this patent
Estimating the term…
Abstract
The invention relates to an expansion clamping device having a main body (2) and an expansion sleeve (5) which is inserted into the main body (2) or surrounds the body, forming a pressure chamber (8), the pressure chamber (8) being capable of being acted upon by a hydraulic medium with resilient deformation of the expansion sleeve (5). The expansion sleeve (5) is integrally fixed to the main body (2) at the front axial end region (16) and/or at the rear axial end region (17) of the pressure chamber (8) via a friction-welded connection (14).
Claims8
An expansion clamping device, comprising:
- a base body (2) defining a longitudinal axis;
- and
- a sleeve (5) inserted into or surrounding the base body (2) and forming at least one pressure chamber (8), wherein the at least one pressure chamber (8) can be pressurized by a hydraulic medium in order to achieve a clamping effect, wherein the sleeve (5) is fixed to the base body (2) by a friction weld joint (14) at a front axial end region (16) of the at least one pressure chamber (8) and/or at a rear axial end region (17) of the at least one pressure chamber (8), and wherein the at least one pressure chamber (8) receives in the front and/or rear axial end region (16, 17) adjacent to the friction weld joint (14) a welding bead (15) produced during the creation of the friction weld joint (14) and is widened relative to a region (18) of the at least one pressure chamber (8) which is central in an axial direction.
Dependencies are inferred from the claim text.