Hydraulic Expansion Chuck Segmentation for Manufacturing
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Solution Overview
Problem
The production of hydraulic expansion chucks is complicated, particularly due to the production of thin-walled projections and pressure-tight soldering of clamping sleeves to the basic body, which makes long and narrow designs challenging.
Innovation Solution
A three-part design for the expansion chuck, comprising a basic body, a clamping sleeve, and a separate inner sleeve, where the inner sleeve contains the expansion bushing and has a radially protruding annular collar that overlaps the clamping sleeve, simplifying manufacturing and pressure-tight soldering, and providing a stable connection that protects against chip abrasion and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a thin-walled projection of the basic body is used to form the pressure chamber, then the chuck can achieve a long and narrow design, but the production becomes comparatively complicated due to pressure-tight soldering requirements
Solution Approach 1:
The expansion chuck is divided into separate components: the basic body, the clamping sleeve, and the inner sleeve. This segmentation allows each part to be manufactured independently using standard processes, avoiding the complex thin-walled projection and pressure-tight soldering required in the prior art. The inner sleeve is inserted into the clamping sleeve to form the pressure chamber, eliminating the need for difficult soldering operations.
2Shape
If the clamping sleeve is pressure-tight soldered to the basic body, then a long and narrow chuck design is achieved, but the manufacturing process becomes more difficult
Solution Approach 1:
The clamping sleeve and inner sleeve are manufactured as separate components that are assembled together. The inner sleeve is inserted into the clamping sleeve to form the pressure chamber, eliminating the need for pressure-tight soldering between these components. This segmentation allows each part to be manufactured using standard processes without requiring complex soldering operations.
3Ease of manufacture
If a separate inner sleeve is used with an annular collar overlapping the clamping sleeve, then manufacturing is simplified, but the connection point becomes exposed to chip abrasion
Solution Approach 1:
The annular collar of the inner sleeve protrudes radially outward beyond the clamping sleeve to preemptively protect the connection point between the inner sleeve and basic body. This collar acts as a protective barrier that prevents chips and abrasive materials from reaching and damaging the soldered connection, thereby preventing wear and potential failure before they can occur.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The three-part design simplifies manufacturing and enhances the stability and durability of the chuck by reducing the complexity of production and protecting the connecting points from friction and chip abrasion, ensuring reliable operation and extended service life.
Implementation Method 1
if pressure is applied to the pressure medium, it is elastically deformed radially and in the process clamps in the inserted tool
Implementation Method 2
it is elastically deformed radially
Implementation Method 3
it damps jolts and vibrations which occur during operation
Data Source
AI summary
The invention relates to a hydraulic expansion chuck having an end on the tool side; and an end on the machine side. A shaft is disposed on the end on the machine side for clamping the expansion chuck in a machine tool. An expanding bushing is disposed on the end on the tool side and surrounded by a pressure chamber and can be radially deformed for clamping a tool under the action of a pressure medium received in the pressure chamber.