Segmented Rake Face Cutting Insert for Variable Cutting Conditions

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Solution Overview

Problem

The existing cutting insert described in WO 2016/017470 lacks versatility for various process conditions, limiting its effectiveness in different cutting scenarios.

Innovation Solution

The cutting insert features a top surface with specific rake faces, side surfaces, and an outer peripheral surface design, including a corner cutting edge and straight cutting edge portions, which allows for improved versatility by adjusting the inclination angles and widths of these surfaces to accommodate different cutting conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the cutting insert uses a simple rake face design, then the structure is simple, but the versatility for various process conditions is insufficient

Engineering Contradiction:

Improveversatility for various process conditionsVSAvoidstructure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The rake face is segmented into multiple distinct regions (first rake face, second rake face, third rake face) with different inclination angles and functions. Each segment handles specific cutting conditions, allowing the insert to adapt to various process parameters while maintaining a unified tool structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the rake face are given different geometric properties and inclination angles tailored to specific cutting requirements. The first rake face has one inclination angle for certain cutting conditions, while the second and third rake faces have different inclination angles for other conditions, optimizing performance locally across the tool surface.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If the cutting insert has a fixed geometry, then the manufacturing is simple, but it cannot accommodate different feed rates and depths of cut effectively

Engineering Contradiction:

Improveability to handle diverse process conditionsVSAvoidmanufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The cutting insert incorporates multiple rake faces with different inclination angles that can be selectively engaged depending on the cutting conditions. This dynamic geometric adaptation allows the same insert to handle varying feed rates and depths of cut without requiring multiple specialized tools, balancing manufacturing simplicity with operational flexibility.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11400521B2Cutting insert

Publication Date: 2022.08.02 SUMITOMO ELECTRIC HARDMETAL CORP

AI summary

A cutting insert has a top surface, a seating surface, and an outer peripheral surface. The cutting edge includes a corner cutting edge portion, a first cutting edge portion, and a second cutting edge portion. The top surface includes a first rake face, a second rake face, a third rake face, a front side surface, an upper surface, a first side surface, and a second side surface. A ridgeline between the first side surface and the second side surface is continuous to the upper surface. When seen in a direction perpendicular to the seating surface, a width of a boundary between the front side surface and the third rake face is larger than a width of a boundary between the front side surface and the upper surface.