Clamping Device With Elastic Outer Wall For High Speed Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing clamping devices fail to maintain secure clamping of tools at high speeds due to centrifugal forces causing expansion of the clamping device.
Innovation Solution
The clamping device features an elastically deformable outer wall that counteracts expansion by widening outward when clamping wedges are pressed in, ensuring secure clamping through elastic restoring forces, with radial widening in the range of 4 μm to 15 μm to maintain clamping force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a dimensionally stable base body is used for the clamping device, then manufacturing precision and structural stability are improved, but the clamping force is lost at high speeds due to centrifugal expansion
Solution Approach 1:
The base body is designed with non-uniform wall thickness: the outer wall in the region of the chip flute is made elastically deformable (thinner) to allow radial expansion counteracting centrifugal forces, while other regions maintain dimensionally stable material properties. This local differentiation resolves the contradiction by providing elasticity exactly where needed to maintain clamping force at high speeds.
2Reliability
If the outer wall is made elastically deformable to counteract centrifugal expansion, then clamping force maintenance at high speeds is improved, but manufacturing precision and structural rigidity are reduced
Solution Approach 1:
The base body is designed with non-uniform wall thickness: the outer wall in the region of the chip flute is made elastically deformable (thinner) to allow radial expansion counteracting centrifugal forces, while other regions maintain dimensionally stable material properties. This local differentiation resolves the contradiction by providing elasticity exactly where needed to maintain clamping force at high speeds.
3Force
If clamping wedges are pressed axially into the chip flute, then clamping force is improved, but the outer wall expands radially reducing precision
Solution Approach 1:
The patent converts the harmful radial expansion caused by pressing clamping wedges into a beneficial effect. The elastically deformable outer wall is designed to expand radially when wedges are pressed in, and this expansion actively counteracts the centrifugal expansion that occurs during high-speed rotation, thereby maintaining clamping precision and force.
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
This solution ensures reliable clamping even at high speeds, maintaining a large part of the clamping force, with experiments showing a radial clamping path of up to 15 µm, significantly improving over the 3 to 4 μm achievable in prior devices.
Implementation Method 1
the wall which delimits the chip groove on the outside is elastic at least over an axial section in such a way that it is elastically deformed outwards when the at least one clamping wedge is pressed into the chip groove
Implementation Method 2
the clamping wedges are always pressed inwards due to the elastic restoring force of the outer wall, which counteracts an expansion of the receptacle due to the centrifugal forces occurring during operation
Implementation Method 3
at very high speeds, the recording can expand due to the centrifugal forces that occur
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a clamping device comprising a base body (2) which comprises a central receiving element (5) for a component or tool which is to be clamped. At least one groove (6) is embodied in the base body (2), which is open towards the front side of said base body (2). Said clamping device also comprises at least one clamping wedge (9b) which can be pressed in an axial manner into the groove (6) from the open front side thereof, by radial deformation of an inner wall section (7) which is arranged between the groove (6) and the receiving element. The invention is characterised in that the wall (10), which defines the groove (6) on the outside, is elastic at least over an axial partial section in such a manner that it is elastically deformed in the outward direction when the at least one clamping wedge (9b) is pressed into the groove (6).