Cutting Tool Coolant Passage Sealing Without Extra Parts

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Solution Overview

Problem

Existing cutting tools require a greater number of parts and higher manufacturing costs due to the need for sealing members to prevent coolant leaks from openings on the outer circumferential surface.

Innovation Solution

A cutting tool design where the back end of the coolant flow passages are sealed by the tool body and holding member when coupled, eliminating the need for additional sealing members and reducing the number of parts required.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a sealing member is provided to prevent coolant leak from the opening on the outer circumferential surface, then coolant leakage is prevented, but the number of parts increases and manufacturing cost increases

Engineering Contradiction:

Improvecoolant leakage preventionVSAvoidnumber of parts

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the sealing function with the holding member by forming a sealing groove directly on the holding member that engages with a sealing protrusion on the tool body. This integration eliminates the need for separate sealing members while maintaining effective coolant leakage prevention, directly resolving the contradiction between reliability and device complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces a sealing groove structure as an intermediary mechanism between the holding member and tool body. This sealing groove, formed on the holding member, creates a sealing interface that prevents coolant leakage without requiring additional sealing members, thus reducing part count while maintaining sealing effectiveness

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a sealing member is provided to prevent coolant leak from the opening on the outer circumferential surface, then coolant leakage is prevented, but manufacturing cost increases

Engineering Contradiction:

Improvecoolant leakage preventionVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The sealing function is merged into the holding member through the sealing groove structure. This integration eliminates the need for separate sealing members, reducing the total number of parts and associated manufacturing costs while maintaining effective coolant leakage prevention

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent uses a simple sealing groove structure formed on the holding member instead of expensive separate sealing members. This approach uses a cost-effective solution that achieves the sealing function without requiring additional expensive components, thereby reducing manufacturing cost

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS11407044B2Cutting tool

Publication Date: 2022.08.09 TUNGALOY CORP

AI summary

An object of the present invention is to provide a cutting tool that requires the smaller number of parts and can be manufactured at a lower cost. A cutting tool includes: a tool body extending along a central axis and rotatable around the central axis; a cutting insert to be mounted on an insert mounting seat of the tool body; and at least one flow passage provided inside the tool body, the at least one flow passage extending from a back end side toward a front end side of the tool body so as to supply a coolant toward at least a part of the inside of the tool body, a back end side of the at least one flow passage being open at a portion sealed by the tool body and the holding member when the holding member is coupled.