Tool Holder Coolant Sealing for Adjustable Tool Projection
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Solution Overview
Problem
Existing tool holders cannot change the tool protruding length while maintaining the desired coolant supply characteristics, as altering the tool length affects the coolant flow to the cutout part and the tool passage.
Innovation Solution
A tool holder design that includes a movable member with a through hole and a front end surface that can abut the tool rear end surface, allowing the coolant to be directed through the tool passage while preventing flow to the cutout part, thus maintaining coolant supply characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the tool protruding length is changed, then the adaptability is improved, but the coolant supply characteristics deteriorate
Solution Approach 1:
The coolant supply system is segmented into multiple independent pathways: a first coolant supply path through the tool passage and a second coolant supply path through the cutout part. This segmentation allows each path to be independently controlled, enabling tool protruding length adjustment while maintaining reliable coolant supply characteristics through selective path activation.
Solution Approach 2:
The tool holder employs a movable member that can dynamically adjust its position along the tool axial direction. This dynamic adjustment capability allows the system to adapt to different tool protruding lengths while maintaining proper coolant flow control, resolving the contradiction between adaptability and coolant supply reliability.
2Reliability
If the tool rear end surface abuts on the coolant supply port wall surface, then the coolant supply to the tool passage is maintained, but the coolant cannot flow to the cutout part
Solution Approach 1:
A movable member acts as an intermediary element between the tool rear end surface and the coolant supply port wall surface. This intermediary can selectively block or allow coolant flow to different paths based on its position, enabling the system to maintain coolant supply to the tool passage while also allowing coolant flow to the cutout part when needed.
Solution Approach 2:
The coolant supply system provides different local qualities to different regions: the tool passage receives high-pressure coolant through the movable member, while the cutout part receives coolant through a separate path. This local differentiation allows each region to receive appropriate coolant flow based on its specific requirements.
3Adaptability or versatility
If a space exists between the tool rear end surface and the coolant supply port wall surface, then the coolant can flow to the cutout part, but the coolant flow rate to the tool passage is reduced
Solution Approach 1:
The coolant supply is segmented into separate controlled paths, allowing the system to maintain high flow rate to the tool passage through the movable member while simultaneously providing coolant to the cutout part through an independent path, thus avoiding the flow rate reduction that would occur with a single shared path.
Data Source
AI summary
A tool (700, 800) is insertable into an interior space of a body part (400, 240) that is a part of a tool holder (300). The tool has at least one cutout part (730, 831) and may or may not have a tool passage (740), which has an opening (740b) at a tool rear end surface (710B). The cutout part includes a cutout surface (731) on a tool outer peripheral surface (712) and an opening (730b) at the tool rear end surface. By supplying a coolant from a flow inlet (450a) into the interior space of the body part, a movable member (500) is moved forwardly until a front end surface portion (530A) of the movable member sealingly abuts against the tool rear end surface, whereby coolant flows through the tool passage (if present) to a spray port near the tip of the tool.