Double-Sided Indexable Cutting Insert with Angled Seating Surface
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Solution Overview
Problem
Conventional indexable milling inserts are inadequate for performing both milling and ramping operations, as they can only execute ramping at very shallow angles, resulting in poor ramping performance.
Innovation Solution
A double-sided, indexable cutting insert with a bottom seating surface formed at a positive angle relative to the central rotational axis of the milling cutter, featuring a clearance between the seating surface and the cutting edges, enabling the insert to perform both milling and ramping operations effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional indexable milling inserts are designed with standard seating surfaces, then they can perform basic milling operations, but they can only execute ramping operations at very shallow angles resulting in poor ramping performance
Solution Approach 1:
The patent applies parameter changes by modifying the seating surface angle from the conventional horizontal configuration to a positive angle (e.g., 5-15 degrees) relative to the horizontal plane. This angular parameter change enables the cutting insert to perform ramping operations at more aggressive angles while maintaining stable engagement with the workpiece, thereby improving both adaptability and reliability in ramping operations.
Solution Approach 2:
The patent introduces a new dimensional aspect by tilting the seating surface out of the horizontal plane. This creates a three-dimensional engagement geometry where the cutting insert contacts the workpiece at an angled interface, enabling effective ramping operations that were not possible with conventional two-dimensional horizontal seating surfaces.
2Reliability
If the seating surface is formed at a positive angle to enable aggressive ramping, then ramping performance improves, but the clearance between the seating surface and cutting edges must be precisely controlled
Solution Approach 1:
The patent specifies precise parameter ranges for the positive angle of the seating surface (e.g., 5-15 degrees) and defines specific clearance dimensions between the seating surface and cutting edges. By establishing these controlled parameter ranges, the design achieves reliable ramping performance while maintaining manufacturable precision tolerances.
Solution Approach 2:
The patent applies local quality by providing different geometric characteristics to different regions of the cutting insert. The seating surface area has a specific positive angle for ramping engagement, while the cutting edges maintain precise clearance relationships. This localized differentiation of geometric properties enables both aggressive ramping and precise cutting performance.
3Adaptability or versatility
If a double-sided design with multiple cutting edges is implemented, then versatility for both milling and ramping operations is achieved, but the device complexity increases
Solution Approach 1:
The patent implements universality by designing a single cutting insert that can perform both milling operations and ramping operations. The double-sided configuration with multiple cutting edges and the angled seating surface enable the same insert to effectively execute different machining functions, eliminating the need for separate specialized inserts for each operation type.
Solution Approach 2:
The patent applies segmentation by dividing the cutting insert into multiple functional surfaces and cutting edges. The first and second planar surfaces, multiple cutting edges, and angled seating surface are segmented to perform specific functions. This segmentation allows each portion to be optimized for its specific role while contributing to the overall multi-operational capability.
Data Source
AI summary
A double-sided, indexable cutting insert for a milling cutter includes a first surface, a second surface, and side surfaces. Major cutting edges are defined at an intersection between the first and second surfaces and side surfaces. Minor cutting edges and ramping cutting edges are defined at the intersection between the first and second surfaces and side surfaces. The cutting insert is mounted in a milling cutter having a bottom seating surface formed at an angle with respect to a central, rotational axis of the milling cutter, which provides superior performance for both milling and ramping cutting operations.