Round Turning Insert Seat Geometry for Vibration-Resistant Indexing
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Solution Overview
Problem
Existing turning tools with circular cutting edges face issues of unstable fixation, leading to potential insert breakage and increased risk of vibrations during machining, particularly under high cutting forces.
Innovation Solution
A turning tool design featuring a round turning insert with radial grooves and a first ridge that allows for indexable positioning, providing stable mounting and reduced risk of rotation, breakage, and vibrations, while allowing for economical manufacturing with increased tolerance in groove and ridge dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the turning insert uses radial grooves and a first ridge for positioning, then the indexing precision and stability are improved, but the manufacturing complexity increases
Solution Approach 1:
The bottom surface of the turning insert is segmented into multiple radial grooves that divide the circular path into discrete indexing positions. This segmentation allows the insert to be positioned at predetermined angles while maintaining a relatively simple overall structure.
Solution Approach 2:
The first ridge acts as an intermediary element that engages with the radial grooves to provide positioning. This intermediary mechanism enables precise indexing without requiring complex locking or adjustment systems, balancing precision with structural simplicity.
2Stability of the object's composition
If the turning insert is securely fixed to prevent rotation, then the stability during machining is improved, but the risk of insert breakage under high cutting forces increases
Solution Approach 1:
The insert seat provides localized support through the first ridge at specific radial positions where needed for indexing, while maintaining flat bottom contact surfaces over larger areas to distribute cutting forces. This local differentiation allows stable positioning without concentrating stress that could cause breakage.
Solution Approach 2:
The flat bottom contact surfaces are designed to provide inherent cushioning and stress distribution before cutting forces are applied. This pre-configured support system reduces the risk of sudden insert breakage under high loads while maintaining stability.
3Object-affected harmful factors
If the contact surfaces between insert and seat are increased for stability, then the resistance to vibrations is improved, but the complexity of ensuring precise contact increases
Solution Approach 1:
The bottom surface of the insert and the corresponding seat surface are both designed as flat, homogeneous contact surfaces. This homogeneity ensures uniform contact across the interface, providing vibration resistance without requiring complex surface profiles or precise geometric features.
Solution Approach 2:
The positioning function (via radial grooves and first ridge) and the stable contact function (via flat bottom surfaces) are merged into a single integrated insert seat design. This combination achieves both vibration resistance and manufacturing simplicity without requiring separate complex mechanisms.
Data Source
Figure 1~2
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Figure 5~8
AI summary
A turning tool (13) comprising a tool body (14) and a turning insert (1), wherein the turning insert (1) comprises a top surface (2) and an opposite bottom surface (3), a reference plane (RP) between the top and bottom surfaces (2, 3), a center axis (A1) intersecting the top and bottom surfaces (2, 3), wherein the cutting edge (5) being circular and concentric in relation to the center axis (A1), wherein the bottom surface (3) comprises a set of radial grooves (10), wherein the bottom surface (3) comprises a set of flat surfaces (19), wherein the flat surfaces (19) extend in a plane parallel to the reference plance (RP), wherein the turning tool (13) comprises an insert seat (15), wherein the insert seat (15) comprises a bottom surface (16) and a rear surface (17), wherein the bottom surface (16) of the insert seat (15) comprises a first ridge (18), wherein the bottom surface (16) of the insert seat (15) comprises a support surface (21, 32), wherein at least one of the flat surfaces (19) of the turning insert (1) is in contact with the support surface (21), wherein a cross section of the first ridge (18) is smaller than a corresponding cross section of one of the radial grooves (10).