Cutting Tool Body Coolant Path for Chip Removal and Rigidity
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Solution Overview
Problem
Existing cutting tools face challenges in providing a flow path at the leading end with sufficient cross-sectional area while maintaining rigidity, especially for hole machining tools where coolant supply and chip removal are difficult due to limited space.
Innovation Solution
The cutting tool body is designed with a flow path that maintains distances from the insert mounting seat, screw hole, and periphery to ensure a maximized cross-sectional area, featuring a triangular and fan-like shape in cross-section, with distances of at least 0.1 mm to 0.5 mm, and a discharge port shaped to enhance coolant discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a flow path is provided at the leading end of the body with sufficient cross-sectional area, then coolant supply and chip removal efficiency are improved, but rigidity of the body deteriorates due to the limited space in the leading end portion
Solution Approach 1:
The flow path is designed to extend in the axial direction of the body rather than being confined to the radial plane at the leading end. By transitioning from a two-dimensional cross-sectional approach to a three-dimensional axial extension, the flow path achieves sufficient cross-sectional area for coolant supply and chip removal without compromising the rigidity of the leading end portion.
Solution Approach 2:
The flow path is segmented into multiple sections along the axial direction, with each section having optimized dimensions. The flow path includes a first section and a second section with different cross-sectional areas, allowing the design to maximize coolant flow capacity in non-critical areas while maintaining structural integrity in load-bearing regions.
2Productivity
If the flow path is positioned close to the insert mounting seat and fastening portion to maximize cross-sectional area, then coolant discharge capability is improved, but the structural integrity and rigidity of the leading end portion deteriorate
Solution Approach 1:
The flow path is designed with varying cross-sectional areas at different locations. The first section has a larger cross-sectional area optimized for coolant discharge, while the second section has a smaller cross-sectional area that maintains structural integrity. This local optimization allows the flow path to achieve high coolant discharge capability where needed while preserving structural strength in critical areas.
Solution Approach 2:
The flow path extends axially through multiple sections rather than being confined to a single cross-sectional plane. This dimensional approach allows the design to accommodate both large cross-sectional areas for coolant discharge and smaller areas for structural reinforcement along the axial length of the body.
Data Source
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AI summary
A body of a cutting tool has: an insert pocket in which a cutting insert is mounted; a screw hole into which an insert mounting screw for fastening the cutting insert to the insert pocket is screw-inserted; and a chip removal coolant flow path for allowing coolant C to be discharged through a discharge port that is open at a leading end of the body, wherein at least a part of the chip removal coolant flow path is at respective distances Da, Db and Dc from the insert pocket, from the screw hole, and from the periphery of the body, in a cross-section perpendicular to the axial direction of the body, wherein each of the distances Da, Db and Dc is equal to or greater than a predetermined size.