Indexable Parting Blade Coolant Channels for Larger Parting Depth

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Solution Overview

Problem

Indexable parting blades with multiple insert pockets face challenges in providing effective coolant supply due to space constraints and obstructed coolant channels, limiting their ability to achieve a large parting depth and efficient coolant distribution.

Innovation Solution

The design incorporates a nested coolant channel configuration with multiple outlets per insert pocket, sharp turns, and specific cross-sectional shapes to bypass obstructing channels and ensure effective coolant delivery, including a first inlet positioned further from the insert pocket than the second inlet, and channel paths with significant turns to maintain coolant flow and structural strength.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a direct coolant channel path is used from inlet to outlet, then coolant flow efficiency is improved, but the channel path is obstructed by other channels in rotatable symmetric blades

Engineering Contradiction:

Improvecoolant flow efficiencyVSAvoidchannel path obstruction

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The coolant channels are arranged in a nested configuration where channels are positioned at different radial distances from the central index axis. The first coolant channel has its inlet at a first radial distance and the second coolant channel has its inlet at a second radial distance, allowing channels to be nested concentrically rather than obstructing each other, thus maintaining direct paths while accommodating multiple channels

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The solution transitions from a two-dimensional planar arrangement of coolant channels to a three-dimensional nested arrangement with varying radial distances from the central index axis. This dimensional change allows channels to coexist without obstruction by positioning them at different radial levels, preserving direct coolant flow paths

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If multiple coolant channels are provided per insert pocket, then coolant distribution effectiveness is improved, but space constraints in the blade structure worsen

Engineering Contradiction:

Improvecoolant distribution effectivenessVSAvoidblade internal space

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

Multiple coolant channels are nested concentrically around the central index axis at different radial distances. This nesting allows multiple channels to be accommodated within the limited blade cross-sectional area without requiring additional lateral space, maintaining blade structural integrity while providing effective coolant distribution

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The solution utilizes the radial dimension from the central index axis to accommodate multiple coolant channels. By distributing channels at different radial distances rather than only lateral positions, the blade can provide multiple coolant paths per insert pocket while maintaining a compact cross-sectional area

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Ease of manufacture

If the blade inlet aperture is located at the central index axis, then coolant channel alignment is simplified, but the depth of cut capability is reduced

Engineering Contradiction:

Improvechannel alignment simplicityVSAvoidparting depth capability

Core Design Contradiction:

Ease of manufactureVSLength of moving object

Solution Approach 1:

The blade inlet aperture is positioned asymmetrically at an offset location from the central index axis. This asymmetric positioning allows the coolant channels to be aligned with the cutting edge at the optimal location for maximum parting depth, rather than being constrained to radiate from the center, thus improving depth capability while maintaining manufacturability

Inventive Principle:

Principle #4Asymmetry

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 allows for a larger parting depth and effective coolant supply to cutting inserts, enhancing machining performance while maintaining the structural integrity of the blade, even in space-constrained environments.

Implementation Method 1

a first coolant channel comprising a first inlet, at least one first outlet opening out to the first insert pocket, and a first channel portion extending between the first inlet and the at least one first outlet

Methodology Applied

Scientific EffectFluid flow through curved channels:

Data Source

PatentUS11565327B2Indexable parting blade with circuitous coolant channels

Publication Date: 2023.01.31 ISCAR LTD

AI summary

An indexable parting blade has opposite blade first and second sides, a blade peripheral edge, a central index axis, and at least first, second and third insert pockets located along the blade peripheral edge. The parting blade also has first, second and third coolant channels, each forming a coolant path from a corresponding inlet to a corresponding one of the insert pockets. Each coolant channel includes a rake outlet opening out to a rake side of its corresponding insert pocket and a relief outlet opening out to a relief side of that same insert pocket. The inlet corresponding to a given coolant channel is located further from that coolant channel's insert pocket than at least one of (a) the inlet corresponding to a different coolant channel, and (b) the central index axis.