Cutting Tool Holder Flow Path Layout for Higher Coolant Pressure
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Solution Overview
Problem
Existing cutting tools face challenges in achieving enhanced coolant injection pressure due to a thin thickness between the coolant flow path and the side surface of the chip fixing part, which limits cooling efficiency and chip discharge performance.
Innovation Solution
The cutting tool design includes a holder with a bar shape and a cutting insert, featuring a recessed pocket for the insert, a first flow path for coolant inflow, and a second flow path with an outflow port positioned closer to the upper surface, allowing for increased coolant injection pressure and improved chip discharge by enhancing the thickness between the flow path and the side surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the coolant flow path is positioned close to the side surface of the chip fixing part, then the structure is compact, but the coolant injection pressure is insufficient
Solution Approach 1:
The patent repositions the coolant flow path from a position close to the side surface to a position closer to the upper surface of the holder, effectively changing the spatial dimension of the flow path location. This dimensional shift allows the flow path to be positioned at a greater distance from the side surface, thereby enabling enhanced coolant injection pressure without compromising structural compactness.
2Stress or pressure
If the thickness between the flow path and side surface is increased, then coolant injection pressure is enhanced, but the holder structure becomes more complex
Solution Approach 1:
Instead of increasing the thickness in the lateral direction (distance from side surface), the patent utilizes the vertical dimension by positioning the flow path closer to the upper surface. This approach achieves enhanced coolant injection pressure through increased thickness in the vertical direction while maintaining a compact lateral profile, thus avoiding excessive holder thickness.
3Stress or pressure
If the flow path is repositioned closer to the upper surface, then coolant injection pressure improves, but chip discharge performance may be affected
Solution Approach 1:
The patent applies local quality by creating a recess at the front end of the holder where chips are generated and discharged. This recess provides a dedicated space for chip accumulation and discharge, while the flow path positioned closer to the upper surface provides enhanced coolant injection. The two features work independently in their respective local zones, allowing both improved coolant pressure and maintained chip discharge performance.
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
This design enhances coolant injection pressure and chip discharge performance, leading to improved cooling efficiency and tool durability, while maintaining smooth machined surfaces and reducing chatter vibrations during the cutting process.
Implementation Method 1
The first flow path may be located along a central axis of the holder and may include an inflow port
Implementation Method 2
The second flow path may be located closer to the upper surface than the recess, connects to the first flow path, and may include an outflow port
Implementation Method 3
The coolant injected from the injection port may be injectable toward the cutting edge of the cutting insert
Data Source
AI summary
A cutting tool may include a holder extended along a central axis from a first end to a second end and including a pocket, and a cutting insert located in the pocket. The holder may further include an upper surface, a lower surface, a first end surface, a first side surface, a recess, a first flow path and a second flow path. The recess opens into the first end surface and the first side surface. The first flow path is located along the central axis. The second flow path is located closer to the upper surface than the recess and connects to the first flow path. An imaginary plane that passes through the central axis and is orthogonal to the lower surface is a reference plane. The pocket opens into the recess and is recessed from the recess toward the reference plane.