Cutting Insert with Adaptive Curved Edge for Chatter Reduction
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Solution Overview
Problem
Indexable cutting inserts with circular cutting edges tend to vibrate during machining, leading to poor surface quality and short tool life due to uncontrolled vibratory movements, known as chatter, which results in irregularities on the workpiece surface.
Innovation Solution
A cutting insert design featuring a rake face and flank forming an encircling round or polygonal cutting edge with cutting edge points at maximum and minimum distances from a plane, where the cutting edge points are located at the intersection of a vertical enveloping surface and a parallel plane, allowing for adaptive curvature and reduced vibration by distributing load forces across the cutting edge profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a circular cutting edge of constant height is used, then the cutting insert can be easily manufactured and indexed, but it causes vibration and chatter during machining
Solution Approach 1:
The cutting edge is designed with variable height and curvature instead of constant height. The cutting edge profile includes maxima and minima that create an adaptive curved geometry, allowing the cutting edge to conform to the workpiece surface and distribute loads more evenly, thereby reducing vibration and chatter while maintaining manufacturing feasibility
Solution Approach 2:
The cutting edge geometry is made dynamic through its variable height profile with maxima and minima. This dynamic geometry allows the cutting edge to adapt to varying radial positions during machining, enabling the insert to maintain stability across different indexing positions and machining conditions
2Stability of the object's composition
If cutting edge points are lowered to minima, then vibration is reduced, but the original cutting edge shape is changed
Solution Approach 1:
The cutting edge is transformed from a planar or frustoconical shape to a three-dimensional curved profile with variable height. The cutting edge points are strategically positioned at maxima and minima along a curved path, creating an adaptive geometry that reduces vibration while the overall encircling round or polygonal shape is preserved
Solution Approach 2:
The cutting edge design transitions from a two-dimensional planar shape to a three-dimensional profile by introducing height variations. The cutting edge points are distributed in three-dimensional space with varying distances from the bearing surface plane, adding a vertical dimension that enables vibration reduction while maintaining the fundamental cutting geometry
3Manufacturing precision
If the cutting edge has variable height with maxima and minima, then surface quality is improved, but the device complexity increases
Solution Approach 1:
The variable height cutting edge with maxima and minima creates an adaptive curved profile that improves surface quality by distributing cutting forces more evenly. The curved geometry allows the cutting edge to follow the workpiece contour more accurately, reducing chatter marks while the modular insert design keeps the overall system complexity manageable
Data Source
AI summary
A cutting insert for machining a workpiece. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.