Coolant Hole Holder Layout for Stable Tool Projection
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Solution Overview
Problem
Existing cutting tools face challenges in maintaining stable fluid supply during machining processes due to variations in projection amounts, leading to potential leakage and durability issues.
Innovation Solution
A holder with a bar shape and multiple coolant holes, including a main coolant hole and sub coolant holes with varying opening widths and positions, allows for flexible fluid supply and reduced durability deterioration by enabling stable coolant flow even with positional shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projection amount of the cutting tool from the turret is increased to maintain high degree of setting, then the machining flexibility is improved, but the fluid supply stability deteriorates due to potential misalignment and leakage
Solution Approach 1:
The fluid supply system is segmented into multiple independent pathways (first sub coolant hole and second sub coolant hole) that can operate separately or together. This segmentation allows the system to maintain fluid supply stability even when projection amount varies, as one pathway can compensate for misalignment in another.
Solution Approach 2:
Different regions of the holder are given different functional qualities - the first sub coolant hole is positioned closer to the first end for standard operations, while the second sub coolant hole is positioned closer to the second end for extended projection scenarios. This local differentiation ensures optimal fluid supply regardless of projection amount.
2Device complexity
If a single fluid supply pathway is used to simplify the structure, then the device complexity is reduced, but the fluid supply reliability deteriorates under varying projection amounts
Solution Approach 1:
The holder is designed with multi-functional coolant holes that can serve different purposes based on projection requirements. The first sub coolant hole serves as the primary pathway for standard projections, while the second sub coolant hole provides alternative supply for extended projections, making the system universally applicable across varying machining conditions.
Solution Approach 2:
The fluid supply system is made dynamic by enabling selective activation of different coolant holes based on actual projection amount. The control unit can dynamically switch between or combine pathways to maintain optimal fluid supply consistency regardless of holder position variations.
3Productivity
If the first sub coolant hole is positioned closer to the first end for standard fluid supply, then the fluid flow efficiency is improved, but the system adaptability to extended projection scenarios deteriorates
Solution Approach 1:
The coolant hole configuration uses a nested structure where the first sub coolant hole serves as the primary fluid pathway for standard operations, while the second sub coolant hole is positioned to provide nested alternative supply for extended projection scenarios. This nested arrangement allows efficient fluid flow for common cases while maintaining adaptability for extended ranges.
Data Source
AI summary
A holder may include a first end surface, a first lateral surface extending from the first end surface, a pocket which opens into the first end surface and the first lateral surface, a main coolant hole, a first sub coolant hole connecting to the main coolant hole, and a second sub coolant hole connecting to the main coolant hole. The first sub coolant hole may include a first opening that opens into the first lateral surface. The second sub coolant hole may include a second opening that opens into the first lateral surface. A width of the first opening in a direction along a central axis may be smaller than a width of the second opening in the direction along the central axis.