Integrated Cutting Insert With Fluid Groove for Small-Diameter Hole Machining
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Solution Overview
Problem
Existing cutting tools face challenges in reducing diameter while maintaining strength and providing effective coolant supply to the cutting location due to multiple components and complex structures, which hinder efficient machining.
Innovation Solution
A cutting insert design with integrated guide parts and a fluid groove that reduces tool diameter by consolidating guide pad functions and allows coolant delivery directly to the cutting edge, featuring a recessed fluid groove and optimized fastening mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple components (cutting insert and guide pads) are fixed onto the body using screws, then the guide function is achieved, but the number of components increases making it difficult to reduce the tool diameter
Solution Approach 1:
The patent merges the cutting insert and guide pads into a single integrated cutting insert structure. The guide parts are formed as integral portions of the cutting insert, eliminating the need for separate guide pad components and their fastening mechanisms. This consolidation directly reduces the number of components while maintaining the guide function, thereby enabling tool diameter reduction.
Solution Approach 2:
The cutting insert is designed to perform multiple functions simultaneously: it provides both cutting capability (through the cutting edge) and guide function (through the guide parts in sliding contact with the machined hole inner surface). This multi-functionality eliminates the need for separate dedicated guide components, reducing overall device complexity and enabling compact tool design.
2Length of stationary object
If the diameter of the cutting tool is reduced by consolidating components, then the tool size is reduced, but it becomes difficult to provide a flow path for supplying coolant to the cutting location
Solution Approach 1:
The patent utilizes the thickness dimension (z-direction) of the cutting insert to create the coolant flow path. The recessed part is formed by removing material in the thickness direction, creating a three-dimensional coolant passage that does not increase the radial dimensions (diameter) of the tool. This allows coolant supply functionality to be integrated without compromising tool size reduction.
3Length of stationary object
If the thickness of the cutting insert is reduced to minimize tool diameter, then the tool size is reduced, but the strength of the cutting insert is lowered
Solution Approach 1:
The recessed part is strategically positioned and dimensioned to accommodate coolant flow while maintaining sufficient material thickness in critical load-bearing areas. The guide parts are arranged to provide structural support, and the recessed part is nested within the overall insert geometry such that it does not compromise the structural integrity needed for high-strength 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
The design achieves a reduction in tool diameter while maintaining strength and ensuring efficient coolant delivery to the cutting location, enhancing machining efficiency and stability.
Implementation Method 1
at least two guide parts that are in sliding contact with an inner surface of a machined hole of the workpiece
Implementation Method 2
a fluid groove provided between the guide parts, the fluid groove being formed so as to be recessed inwardly
Data Source
AI summary
The present disclosure provides a cutting insert mounted to a body when hole machining is performed on a workpiece, the cutting insert comprising: a cutting edge that cuts the workpiece; at least two guide parts that are in sliding contact with an inner surface of a machined hole of the workpiece that has been formed by hole machining; and a fluid groove provided between the guide parts, the fluid groove being formed so as to be recessed inwardly with respect to a circumcircle that circumscribes the guide parts and an outer peripheral end of the cutting edge in a front view.