Cutting Tool Fixing Member With Low-Loss Coolant Flow
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Solution Overview
Problem
The existing fixing members in cutting tools face challenges in delivering coolant efficiently due to the small cross-sectional area of the flow path, resulting in high pressure loss and inadequate coolant discharge at the cutting location.
Innovation Solution
The proposed fixing member design includes a fitting protrusion with an inlet port on its outer peripheral surface, allowing for a larger diameter inlet and reducing pressure loss. This design also features a coolant reservoir with a larger cross-sectional area between the introduction and discharge flow paths, ensuring smooth coolant delivery and discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inlet port is formed in the end surface of the fitting protrusion, then the structure is simple, but the diameter is limited and pressure loss increases
Solution Approach 1:
The inlet port is relocated from the end surface (one-dimensional limitation) to the outer peripheral surface (two-dimensional availability), enabling a larger diameter opening while maintaining structural simplicity. This dimensional shift resolves the contradiction by providing more spatial freedom for the port geometry.
2Volume of moving object
If the flow path cross-sectional area is small, then the fixing member structure is compact, but coolant delivery efficiency decreases
Solution Approach 1:
The patent optimizes the flow path parameters by increasing the inlet port diameter and strategically positioning it on the outer peripheral surface. This parameter change allows for improved coolant flow rate and reduced pressure loss while maintaining the compact overall structure of the fixing member.
3Loss of energy
If the inlet port is on the outer peripheral surface of the fitting protrusion, then pressure loss is reduced, but the spring mounting position is restricted
Solution Approach 1:
The fitting protrusion is designed with functionally segmented zones: the outer peripheral surface accommodates the inlet port for optimal coolant flow, while the end surface remains available for spring mounting. This segmentation allows both functions to coexist without interference, resolving the apparent contradiction.
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
The new design effectively reduces coolant pressure loss and ensures smooth discharge from the discharge port, allowing for appropriate cooling and lubrication of the cutting location, while also enabling the mounting of a spring for easy detachment of the fixing member.
Implementation Method 1
a flow path that guides a fluid delivered from a supply path of the tool body to a discharge port formed in a leading end of the fixing member body so as to be discharged therefrom
Implementation Method 2
it is possible to appropriately supply the fluid to a cutting location of the cutting insert to cool and lubricate such cutting location
Data Source
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AI summary
A fixing member that presses and fixes a cutting insert disposed on an insert mounting part of a tool body, the fixing member including: a fixing member body that has a pressing part for pressing the cutting insert; a fitting protrusion that is provided so as to protrude from a bottom part of the fixing member body, the fitting protrusion being fitted in a fitting hole formed in the tool body; and a coolant introduction flow path, a coolant discharge flow path and a coolant reservoir that guide a coolant delivered from a coolant branch flow path of the tool body to a discharge port formed in a leading end of the fixing member body so as to be discharged therefrom, wherein an inlet port of the coolant introduction flow path which communicates with an outlet port of the coolant branch flow path of the tool body is formed in an outer peripheral surface of the fitting protrusion.