Fluted Cutting Tool Depressions for Heat Dissipation

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Solution Overview

Problem

Cutting tools experience reduced efficiency and tool failure due to flute clogging and inadequate heat dissipation, leading to thermal cracking and wear, especially during peripheral cutting operations where chip formation and evacuation occur simultaneously.

Innovation Solution

The implementation of depressions recessed into the flute surfaces of cutting tools, which trap cooling liquid and enhance heat dissipation by reducing chip-flute contact area and promoting lubrication, thereby increasing tool life and material removal rates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If continuous grooves are formed in the flute inner surface to reduce friction, then chip discharge is smoothed, but heat dissipation capability is significantly reduced and flute strength is weakened

Engineering Contradiction:

Improvechip discharge smoothnessVSAvoidheat dissipation capability

Core Design Contradiction:

Ease of operationVSTemperature

Solution Approach 1:

The patent divides the flute inner surface into discrete segmented grooves rather than continuous grooves. This segmentation allows the grooves to reduce friction during chip discharge while the spaces between grooves and the overall flute structure maintain heat dissipation pathways and structural integrity, resolving the contradiction between smooth chip discharge and heat dissipation capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies grooves only in specific localized regions of the flute inner surface where friction reduction is most beneficial for chip discharge, rather than throughout the entire flute length. This local application maintains heat dissipation capabilities in other regions and preserves flute strength, addressing both the chip discharge smoothness and heat dissipation requirements

Inventive Principle:

Principle #3Local quality

2Productivity

If flutes are designed for efficient chip evacuation, then productivity increases, but heat generation from friction increases and cooling effectiveness decreases

Engineering Contradiction:

Improvechip evacuation efficiencyVSAvoidchip temperature

Core Design Contradiction:

ProductivityVSTemperature

Solution Approach 1:

The patent introduces cooling liquid as an intermediary substance that flows through the flute structure and contacts the chips during evacuation. The cooling liquid absorbs heat from the chips and flute surfaces, enabling efficient chip evacuation to proceed without excessive heat generation, thus resolving the contradiction between productivity and temperature control

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent utilizes hydraulic cooling by introducing cooling liquid through the flute structure. The liquid flow system provides continuous cooling to the chips and flute surfaces during the chip evacuation process, allowing high productivity to be maintained while preventing excessive heat buildup that would otherwise occur during efficient chip removal

Inventive Principle:

Principle #29Pneumatics and hydraulics

3Temperature

If cooling liquid is supplied continuously, then heat dissipation is improved, but supply reliability fluctuates and intermittent machining causes temperature variations

Engineering Contradiction:

Improvecooling effectivenessVSAvoidcooling liquid supply reliability

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The patent designs the flute structure with built-in cooling chambers and liquid retention features that store cooling liquid beforehand. During intermittent machining or supply fluctuations, this pre-stored cooling liquid continues to provide cooling to the chips and flute surfaces, cushioning against the unreliability of continuous supply and maintaining temperature control during gaps in cooling liquid flow

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 depressions significantly increase heat dissipation and tool life by prolonging cooling liquid exposure, reducing friction, and preventing clogging, resulting in improved surface finish and extended tool durability.

Implementation Method 1

at least one of the depressions is dimensioned and disposed to enhance heat dissipation at at least one of the peripheral cutting edges

Methodology Applied

Scientific EffectHeat dissipation: Conduction (thermal)

Implementation Method 2

trap cooling liquid during operation of the cutting tool

Methodology Applied

Scientific EffectCooling: Cooling

Implementation Method 3

reducing chip-flute contact area

Methodology Applied

Scientific EffectFriction reduction: Friction

Data Source

PatentUS10661362B2Fluted cutting tool configuration and method therefor

Publication Date: 2020.05.26 HANITA METAL WORKS LTD

AI summary

One aspect of the invention provides a cutting tool used for peripheral cutting operations, comprising: a plurality of peripheral cutting edges, and a plurality of flutes disposed between the peripheral cutting edges, wherein each of the flutes includes at least one surface, and at least one depression recessed into the at least one flute surface, wherein each of the depressions defines a depression interior configured to trap cooling liquid during operation of the cutting tool, and wherein at least one of the depressions is dimensioned and disposed to enhance heat dissipation at least one of the peripheral cutting edges.