Cutting Insert Internal Coolant Passage Geometry
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Solution Overview
Problem
In chipforming material removal operations, excessive heat at the insert-chip interface reduces tool life and leads to premature breakage and wear, with chips sometimes sticking to the cutting insert, causing re-cutting and inefficient coolant delivery.
Innovation Solution
A cutting insert with internal coolant delivery, featuring a distinct interior coolant passage with varying cross-sectional areas and surface features to enhance coolant flow, allowing for improved lubrication and chip evacuation, and a modular design with a detachable core and base for extended longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If coolant delivery is improved to reduce heat at the insert-chip interface, then tool life is extended, but the patent requires complex internal coolant passages with varying cross-sectional areas and surface features
Solution Approach 1:
The coolant passage is segmented into multiple sections along its length, with each section having a different cross-sectional area. This segmentation allows the passage to deliver coolant effectively while managing complexity through modular design
Solution Approach 2:
Different sections of the coolant passage have different cross-sectional areas tailored to local requirements. The passage geometry varies along its length to optimize coolant flow distribution to specific cutting locations, applying local quality to resolve the contradiction between effectiveness and complexity
2Reliability
If coolant flow is enhanced to decrease chip sticking, then cutting performance is improved, but the patent requires specific surface features and passage geometry modifications
Solution Approach 1:
Surface features are added at specific locations within the coolant passage to enhance coolant flow and reduce chip sticking. These localized modifications improve cutting performance without requiring complete redesign of the entire passage geometry
Solution Approach 2:
The patent uses standardized surface features and passage geometries that can be replicated across different cutting insert designs, reducing overall complexity through reuse of proven effective designs
3Duration of action of stationary object
If internal coolant delivery is implemented to reduce heat, then tool life increases, but the patent requires modular design with detachable core and base components
Solution Approach 1:
The cutting insert is divided into detachable core and base components, allowing the coolant delivery system to be separated into modular units. This segmentation enables easier manufacturing and assembly while achieving the heat reduction benefits of internal coolant delivery
Solution Approach 2:
The modular core and base components are designed to fit together like nested dolls, with the core containing the coolant passages and the base providing structural support. This nesting approach reduces overall complexity by organizing components in a compact, hierarchical structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The enhanced coolant delivery reduces heat, decreases chip sticking, and increases tool life by up to 261% compared to standard inserts, with improved coolant flow and chip evacuation, and allows for customizable coolant distribution and material selection.
Implementation Method 1
a distinct interior coolant passage communicating with the discrete cutting location. The distinct interior coolant passage has a coolant passage inlet defining a coolant passage inlet cross-sectional area, a coolant passage discharge defining a coolant passage discharge cross-sectional area, and an axial coolant passage length. The distinct interior coolant passage defines a coolant flow cross-sectional area along the axial coolant passage length
Implementation Method 2
enhanced delivery of coolant adjacent the interface between the cutting insert and the workpiece (i.e., the insert-chip interface) to diminish excessive heat at the insert-chip interface
Data Source
AI summary
A metalcutting insert that is useful in chipforming and material removal from a workpiece. The metalcutting insert includes a metalcutting insert body, which includes a cutting edge having at least one discrete cutting location. The metalcutting insert body further contains a distinct interior coolant passage communicating with the discrete cutting location. The distinct interior coolant passage has a coolant passage inlet defining a coolant passage inlet cross-sectional area, a coolant passage discharge defining a coolant passage discharge cross-sectional area, and an axial coolant passage length. The distinct interior coolant passage defines a coolant flow cross-sectional area along the axial coolant passage length thereof. The metalcutting insert further includes a plurality of surface features for enhancing coolant flow to the cutting edge.