Parting Blade Insert Seat and Holder Reinforcement for Stable Cutting
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Solution Overview
Problem
Existing parting blades and tool holders face challenges in maintaining stability and chip evacuation during long overhang and high feed rate machining operations, particularly for large depth of cut applications, due to bending and vibrations, and inefficiencies in coolant delivery and insert seat design.
Innovation Solution
The design of an elongated parting blade with an insert seat configuration featuring non-parallel lower and rear seat abutment surfaces, oblique orientation of the blade, and a tool holder with a reinforcement portion to enhance stability and chip evacuation, along with a coolant arrangement that allows for efficient coolant transfer without threaded holes, reducing blade thickness and improving structural support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the parting blade is made longer for large depth of cut applications, then the depth of cut capability is improved, but bending and vibrations increase reducing stability
Solution Approach 1:
The blade is segmented into modular components including the blade body, insert seat, and coolant channels. The insert seat is designed as a separate functional element that can be precisely positioned to optimize blade support and reduce vibrations during long overhang operations.
Solution Approach 2:
The patent introduces oblique orientation of the blade relative to the tool holder, changing from traditional parallel alignment. This angular dimensionality change directs cutting forces more favorably along the blade length, improving stability during long overhang and large depth of cut applications.
2Productivity
If high feed rates are used to increase productivity, then machining speed is improved, but chip evacuation becomes less efficient
Solution Approach 1:
Coolant channels are nested within the blade structure, with channels positioned to deliver coolant directly to the insert and chip evacuation paths integrated into the blade geometry. This nested design enables efficient chip removal even at high feed rates by providing dedicated evacuation pathways.
Solution Approach 2:
The patent utilizes high-pressure coolant delivery through internal channels to flush chips away from the cutting zone. The hydraulic action of pressurized coolant effectively evacuates chips generated at high feed rates, maintaining cutting efficiency and preventing chip recutting.
3Use of energy by moving object
If threaded holes are added to the blade for coolant delivery, then coolant delivery capability is improved, but blade thickness increases reducing structural efficiency
Solution Approach 1:
Coolant channels are nested within the blade body without requiring threaded holes. The channels are integrated into the blade manufacturing process, allowing coolant delivery while maintaining thin blade geometry and optimal structural efficiency.
Solution Approach 2:
The patent extracts the coolant delivery function from traditional threaded hole configurations and implements it through integrated internal channels. This separation allows the blade to maintain its structural integrity and thin profile while still providing effective coolant delivery to the cutting insert.
4Ease of manufacture
If the insert seat is designed with parallel abutment surfaces for simplicity, then manufacturing is easier, but stability and vibration reduction are compromised
Solution Approach 1:
The insert seat features non-parallel abutment surfaces with specific angular orientations. The first and second abutment surfaces are asymmetrically configured to provide optimal support and positioning of the cutting insert, reducing vibrations and improving stability during cutting operations.
Solution Approach 2:
The insert seat is designed with localized non-parallel surfaces only where needed for insert support and positioning. Other portions of the blade maintain simple geometries for ease of manufacture, combining manufacturing efficiency with enhanced insert seating stability.
Data Source
AI summary
A tool holder including a tool shank and a tool head connected to the tool shank. The tool head comprising an insert seat or a blade pocket. Adjacent to at least a portion of a shank side surface there is a reinforcement portion connecting the shank side surface and the tool head.