Cutter Head Detent Face Geometry for Radial Positioning
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Solution Overview
Problem
Existing cutter heads for subtractive processing of materials face challenges in precise pre-positioning of cutters due to radial tolerances and overdetermined bearing faces, leading to potential inaccuracies and increased risk of injury during manual alignment.
Innovation Solution
A cutter head design featuring a cutter with a radially outward detent face angled between 92° to 112°, allowing for self-precise positioning by an elastic element, eliminating the need for screw connections and reducing the risk of radial displacement at high cutting speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cutter is screwed to a clamping plate with a latching protrusion bearing on a radially outer wall, then the cutter can be secured in the clearance, but pre-positioning precision is reduced due to radial tolerances and overdetermined bearing faces
Solution Approach 1:
The patent inverts the conventional bearing arrangement by switching from a radially outer wall bearing to a radially inner wall bearing. The latching protrusion now bears on the radially inner wall of the groove instead of the outer wall, which eliminates the overdetermination problem and allows precise pre-positioning while maintaining secure mounting.
2Ease of operation
If manual positioning of the cutter on the detent is performed, then the cutter can be aligned with the clearance, but the risk of injury from the sharp blade increases
Solution Approach 1:
The cutter design enables self-positioning through its own geometric features. The radially inwardly directed detent face on the cutter automatically engages with the radially outwardly directed detent on the holder body, allowing the cutter to self-align and self-position without requiring manual handling, thereby eliminating injury risk while maintaining alignment capability.
3Ease of manufacture
If the cutter is positioned by movement of the clamping jaw alone, then the cutter can be secured, but radial displacement may occur at high cutting speeds
Solution Approach 1:
The patent implements preliminary positioning action through the detent-deten face engagement before the cutter is fully secured. The radially inwardly directed detent face on the cutter preliminarily positions the cutter in the radial direction by engaging with the radially outwardly directed detent, preventing radial displacement at high cutting speeds while maintaining a simple securing mechanism.
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
Enables precise and secure cutter positioning without radial displacement at high cutting speeds, reducing the risk of injury and achieving cutting speeds exceeding 120 m/s, while minimizing tolerances and overdetermination.
Implementation Method 1
the cutter is insertable into the clearance counter to the force of at least one elastic element
Data Source
AI summary
A cutter includes a cutting edge, a rear, a cutting surface, a foot and a longitudinal axis, as well as a transverse axis, wherein a stop surface is provided on the rear pointing towards the cutting edge. The stop surface extends in the direction of the transverse axis and is provided at an angle (alpha) of between 92° and 112° in relation to the longitudinal axis. In addition, the cutter is suitable for use in a cutter head having a carrier body, in which at least one radially outwardly open recess is provided for receiving a cutter and a clamping jaw which can be actuated by a clamping screw, and by means of which the cutter can be clamped in a fixed position in the recess. The recess has a stop with a stop surface that is directed radially inwards, and the cutter can be introduced into the recess against the force of at least one elastic element. The cutter can be applied, in a radially outward direction, by its stop surface to the stop surface that is directed radially inwards, by an elastic element.