Hydraulic Expansion Chuck with Long-Lasting Body-to-Sleeve Connection

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent describes a hydraulic expansion chuck designed for use with machine tools such as lathes, milling, or drilling machines. The chuck securely holds the tool shank using a hydraulically actuated expanding structure. The invention features an improved interface between the chuck's main body and its sleeve, resulting in a more durable and reliable connection.

Use CasesContent extracted from patent full text and abstract with AI.

• Precision tool holding in CNC milling machines
• Clamping workpieces in high-speed lathes
• Improved tool shank fixation in automated drilling stations
• Use in manufacturing environments requiring high repeatability and minimal vibration

BenefitsContent extracted from patent full text and abstract with AI.

• Enhanced longevity and stability due to the robust connection between main body and sleeve
• Improved precision and consistency in tool holding
• Reduced maintenance due to increased durability
• Minimized vibration and runout during high-speed machining operations

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The present invention relates to a hydraulic expanding chuck for a machine tool, in particular a turning, milling or drilling machine, wherein the expanding chuck and a clamping space on the front side of the expanding chuck for receiving a tool shank are formed substantially rotationally symmetric about a rotation axis, wherein the expanding chuck comprises a base body, a hydro-clamping structure radially adjacent to the clamping space, and a hydro-expansion volume adjoining the hydro-clamping structure and filled with a hydraulic fluid, and wherein the hydro-expansion volume is bounded by the base body and a sleeve connected to the base body. It is the object of the present invention to propose an expanding chuck with a durable fastening between the base body and the sleeve. The object is achieved by an expanding chuck which is characterized in that interface surfaces between the base body and the sleeve are formed as a first support surface for a first contact surface and/or a second support surface for a second contact surface such that upon pressurization of the hydro-expansion volume the first contact surface is pressed onto the first support surface and/or the second contact surface is pressed onto the second support surface.