Cutting Insert Coolant Duct Radial Distribution

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Solution Overview

Problem

Existing cutting assemblies face challenges in efficiently delivering coolant to the interface between the cutting insert and workpiece, especially as the depth of the groove increases, due to obstruction by the workpiece, which hampers effective heat management during cutting operations.

Innovation Solution

A cutting assembly with a toolholder and cutting insert featuring a coolant duct and 'hub and spoke' arrangement of coolant directing elements and channels, ensuring coolant delivery to the entire cutting edge, even as the groove depth increases, by directing coolant radially outward from a central axis.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If coolant is delivered to the cutting insert-workpiece interface, then heat management is improved, but delivery difficulty increases as groove depth increases

Engineering Contradiction:

Improveheat managementVSAvoidcoolant delivery

Core Design Contradiction:

TemperatureVSEase of operation

Solution Approach 1:

The cutting insert incorporates internal coolant channels nested within its structure, with coolant directing elements positioned at strategic locations including the cutting edge. This nested configuration allows coolant to be delivered from within the insert itself to the cutting interface, bypassing the obstruction problem that occurs when delivering coolant from external sources at greater groove depths.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

Coolant directing elements act as intermediaries between the coolant supply and the cutting interface. These elements, positioned within the cutting insert structure, guide and direct coolant flow to the cutting edge and interface area, ensuring effective heat management even when external coolant delivery becomes difficult at increased groove depths.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If coolant is delivered to the cutting interface, then cooling effectiveness is improved, but coolant delivery becomes obstructed by the workpiece at greater depths

Engineering Contradiction:

Improvecooling effectivenessVSAvoidcoolant obstruction

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

Instead of delivering coolant from the external toolholder to the cutting interface (which becomes obstructed), the invention inverts the approach by incorporating coolant delivery channels and directing elements within the cutting insert itself. This internal delivery system allows coolant to reach the cutting interface from within the insert structure, avoiding obstruction by the workpiece even at greater groove depths.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

Inventive Principle:

Principle #7Nested doll (Nesting)

3Temperature

If coolant is delivered to the cutting insert, then heat management is maintained, but delivery to the entire cutting edge becomes difficult

Engineering Contradiction:

Improveheat managementVSAvoidcoolant distribution system

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The coolant delivery system is segmented into multiple independent channels and directing elements positioned at different locations within the cutting insert, including the cutting edge. This segmentation allows coolant to be distributed to multiple areas simultaneously, ensuring comprehensive cooling of the entire cutting edge and interface without requiring a single complex delivery mechanism.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Coolant directing elements are positioned at specific local locations within the cutting insert structure, including the cutting edge and interface areas. This local positioning ensures that coolant is delivered precisely where heat generation occurs, providing targeted cooling to different regions of the cutting insert based on their specific thermal requirements.

Inventive Principle:

Principle #3Local quality

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

This configuration enables efficient coolant delivery to the cutting insert-workpiece interface throughout the cutting operation, maintaining effective heat management and tool performance even at greater groove depths.

Implementation Method 1

a coolant duct along a central, longitudinal axis, A, that directs coolant from an inlet region to a cutting region

Methodology Applied

Scientific EffectFluid flow through ducts:

Implementation Method 2

a plurality of coolant directing elements separating a plurality of coolant channels configured in at least one hub and spoke arrangement that directs coolant radially outward from the central, longitudinal axis, A, to the entire cutting edge

Methodology Applied

Scientific EffectRadial fluid flow:

Implementation Method 3

Material removal operations can generate heat at the interface between the cutting insert and the workpiece. Typically, it is advantageous to provide coolant to the vicinity of the interface between the cutting insert and the workpiece

Methodology Applied

Scientific EffectCooling: Cooling

Data Source

PatentUS9579727B2Cutting assembly with cutting insert having enhanced coolant delivery

Publication Date: 2017.02.28 KENNAMETAL INC

AI summary

A cutting assembly includes toolholder and a cutting insert. The cutting insert includes a top surface, a rake face and a cutting edge. The top surface includes a coolant duct along a central, longitudinal axis, A, that directs coolant from an inlet region to a cutting region. The cutting region includes a pair of chip deflectors and a plurality of coolant directing elements separating a plurality of coolant channels configured in at least one hub and spoke arrangement that directs coolant radially outward from the central, longitudinal axis, A, to the entire cutting edge of the cutting insert.