Symmetric Cutting Tool Assembly for Stable Multi-Direction Machining

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Solution Overview

Problem

Existing cutting tools lack adaptability and stability in various machining operations, particularly in turning and parting off metal machining, as they are limited to specific configurations and may not accommodate different machining directions effectively.

Innovation Solution

A cutting blade and tool holder design with mirror symmetric angles and abutment surfaces that allow for four possible assembly configurations, enabling the cutting tool to be used in both left-hand and right-hand machining operations and accommodating different machining operations with improved stability and versatility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a conventional cutting tool design is used, then the tool structure is simple, but the adaptability to different machining operations is limited

Engineering Contradiction:
Improveadaptability to different machining operationsVSAvoidtool structure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The cutting blade is designed with mirror symmetry about a plane perpendicular to the cutting direction, allowing the same blade to be used for both left-hand and right-hand cutting operations. The blade can be mounted in multiple orientations (rotated 180 degrees or flipped) to accommodate different machining directions, making a single tool design universal for multiple cutting scenarios including turning, grooving, and parting off operations.

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

2Stability of the object's composition

If a conventional cutting tool design is used, then the manufacturing process is simple, but the stability during machining is insufficient

Engineering Contradiction:
Improvestability during machiningVSAvoidmanufacturing complexity
Core Design Contradiction:
Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

While the overall blade shape maintains symmetry for versatility, the abutment surfaces are designed with specific asymmetric geometric features including tapered surfaces and angled contact faces. These asymmetric surface geometries create stable mechanical engagement with the tool holder, preventing blade movement and vibrations during cutting operations, while the symmetry of the main blade body simplifies the manufacturing process.

Inventive Principle:
Principle #4Asymmetry

Data Source

PatentUS12134135B2Symmetric cutting tool including cutting blade and tool holder provided with converging abutment surfaces
Publication Date: 2024.11.05 ISCAR LTD
  • US12134135B2 patent drawing
  • US12134135B2 patent drawing
  • US12134135B2 patent drawing

AI summary

A cutting tool having a cutting blade, a cutting insert and a tool holder. The cutting blade has converging peripheral blade abutment sub-surfaces exhibiting mirror symmetry about a second symmetry plane. The tool holder has a blade pocket with converging pocket abutment walls exhibiting mirror symmetry about a holder symmetry plane. The cutting tool can be assembled and utilized in four different configurations in a turret.