Cutting Tool Holder Coolant Clamping Without O-Ring Seals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting tool holders with internal coolant channels require a rubber O-ring seal, leading to increased complexity, potential leakage, and limited coolant supply to the cutting edge, especially from the flank side.
Innovation Solution
A cutting tool holder design that eliminates the need for a rubber O-ring seal by using a threaded member with a hollow structure and branch holes to form coolant channels, allowing coolant to be supplied from both the rake-face and flank sides through internal upper-jaw and lower-jaw channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber O-ring seal is added to prevent coolant leakage, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The patent removes the rubber O-ring seal from the system entirely. Instead of adding a sealing component, the invention extracts the sealing function from a separate component and integrates it into the structural interface between the threaded member and holder body, achieving sealing through precision machining and interference fit rather than through a separate elastomeric sealing element.
2Device complexity
If coolant supply channels are provided only in the upper jaw, then device complexity is reduced, but coolant supply coverage is insufficient
Solution Approach 1:
The threaded member is designed with multi-functionality: it serves both as the clamping mechanism (through its threading engagement with the holder body) and as a coolant distribution manifold (through its internal hollow channel and lateral branch holes). This single component performs multiple functions, eliminating the need for separate coolant supply structures in the upper and lower jaws while ensuring comprehensive coolant coverage to both rake-face and flank sides of the cutting insert.
3Device complexity
If the threaded member structure is simplified without seals, then device complexity is reduced, but coolant leakage may occur
Solution Approach 1:
The system achieves sealing through self-service mechanisms inherent in the threaded member- holder interface. The interference fit between the threaded member's outer diameter and the through-hole, combined with the precise positioning of branch holes relative to the holder's coolant channels, creates automatic sealing action during assembly and operation, eliminating the need for separate sealing components while maintaining reliability.
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
Prevents coolant leakage without additional components, enhances coolant supply to the cutting edge from both sides, improving cutting performance and extending the service life of the cutting edge.
Implementation Method 1
the upper law is elastically deformed by a very small amount toward the lower law, thereby clamping the cutting insert held between the laws
Implementation Method 2
coolant introduced from outside to the bottom of the threaded hole through the introduction path is fed to the inlet of the internal upper-jaw channel through the hollow and the branch hole of the threaded member
Data Source
AI summary
A cutting tool includes a holder having an upper jaw and a lower jaw, and an insert clamped between the jaws. A large-diameter hole in a lower-jaw side of the holder communicates with a lower-jaw channel, and a threaded hole in an upper-jaw side of the holder communicates with an upper-jaw channel. A threaded member has a head, a closed-bottom hollow open to the head, branch holes through which the hollow communicates with an outer circumferential surface thereof, and a screw-driving portion in a front end thereof. The threaded member is inserted from the large-diameter hole and screwed into the threaded hole until a front surface of the head seats on a bearing surface of the large-diameter hole and clamps the insert. Then, the large diameter hole, the lower-jaw channel, the hollow, the branch holes, and the upper-jaw channel are in communication for supplying coolant to the insert.