V-Shaped Turning Insert Groove for Inconel and Titanium Finishing

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Solution Overview

Problem

Existing chip forming arrangements for negative turning inserts are not optimized for machining difficult-to-machine materials like Inconel and Titanium, particularly at finish depth machining, and perform variably even with small changes in design elements.

Innovation Solution

A turning insert with a specific chip forming arrangement featuring a single v-shaped groove configuration, optimized for finish depth machining, including precise dimensions and orientations of the groove's components to enhance chip formation and tool life for both Inconel and Titanium workpieces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a single v-shaped groove configuration is used for finish depth machining, then tool life and chip control are improved for both Inconel and Titanium, but the design must precisely optimize groove dimensions to achieve balanced performance across different materials

Engineering Contradiction:
Improvetool lifeVSAvoidgroove configuration complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent optimizes specific geometric parameters of the v-shaped groove including the first horizontal distance D1 (0.50mm ≤ D1 ≤ 1.20mm), first vertical distance H1 (0.15mm ≤ H1 ≤ 0.30mm), and second horizontal distance D2 (1.10mm ≤ D2 ≤ 1.70mm). By precisely controlling these dimensional parameters, the groove configuration achieves balanced performance for machining both Inconel and Titanium materials, improving tool life without increasing design complexity

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The single v-shaped groove configuration is designed to perform multiple functions: it effectively machines both Inconel and Titanium materials, provides chip formation control, and extends tool life across different material types. This universal design eliminates the need for material-specific groove variations, simplifying the overall device complexity while maintaining reliability

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If chip forming arrangement is optimized for Inconel machining, then performance on Inconel improves, but performance on Titanium deteriorates

Engineering Contradiction:
Improveperformance on InconelVSAvoidperformance on Titanium
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent employs optimized parameter ranges for the v-shaped groove that achieve balanced performance across materials. The specific parameter optimization (D1: 0.50-1.20mm, H1: 0.15-0.30mm, D2: 1.10-1.70mm) creates a compromise design that performs adequately on both Inconel and Titanium, rather than maximizing performance on one material at the expense of the other

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The chip forming arrangement acts as a composite solution integrating features that accommodate the different machining characteristics of Inconel and Titanium. The v-shaped groove configuration combines elements suitable for high-strength materials like Inconel with features effective for reactive materials like Titanium, creating a unified design that adapts to both material types

Inventive Principle:
Principle #40Composite materials

3Reliability

If chip forming arrangement is optimized for Titanium machining, then performance on Titanium improves, but performance on Inconel deteriorates

Engineering Contradiction:
Improveperformance on TitaniumVSAvoidperformance on Inconel
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The optimized parameter ranges for the v-shaped groove (D1: 0.50-1.20mm, H1: 0.15-0.30mm, D2: 1.10-1.70mm) are specifically selected to balance performance across both Titanium and Inconel. This parameter optimization ensures that the design does not favor one material excessively, maintaining adaptability while achieving reliable results on both material types

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP3661681B1Negative finish turning insert with chip forming arrangement
Publication Date: 2021.09.22 ISCAR LTD
  • EP3661681B1 patent drawingFigure 1A~1B
  • EP3661681B1 patent drawingFigure 1C~1D
  • EP3661681B1 patent drawingFigure 2A~2B

AI summary

A turning insert (10) for machining both Inconel and Titanium workpieces. The insert (10) includes a chip forming arrangement including only a single v-shaped groove. The groove includes a specific depth and position to improve machining of both Inconel and Titanium work pieces.