Asymmetric Coolant Flow Path in Drilling Inserts
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Solution Overview
Problem
Cutting tools for drilling metal face a challenge in maintaining durability while effectively supplying coolant, as increasing coolant flow path size reduces core thickness and durability.
Innovation Solution
A cutting tool design featuring a circular columnar body with a coolant flow path that is narrower in the radial direction than in the circumferential direction, allowing for increased cross-sectional area and enhanced strength while maintaining a large core thickness for efficient cooling and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the cross section of the flow path is increased to supply a greater amount of coolant, then the coolant supply efficiency is improved, but the core thickness is decreased and durability is lowered
Solution Approach 1:
The flow path cross section is designed to be asymmetric, with the width in the radial direction being smaller than the width in the circumferential direction. This asymmetric configuration allows the flow path area to be increased for better coolant supply while maintaining a sufficient core thickness for durability, resolving the contradiction between coolant quantity and structural strength.
2Productivity
If the flow path width in radial direction is increased to improve coolant flow, then the cooling efficiency is improved, but the core thickness is reduced
Solution Approach 1:
The flow path is designed with asymmetric dimensions where the radial width is intentionally made smaller than the circumferential width. This allows the flow path area to be sufficiently large for effective cooling while preserving the core thickness needed for tool durability and extended service life.
Solution Approach 2:
Instead of increasing the radial width of the flow path, the design compensates by increasing the circumferential width and optimizing the flow path length and configuration. This dimensional redistribution maintains adequate core thickness while achieving the required cooling efficiency through alternative geometric arrangements.
Data Source
AI summary
A cutting tool may include a circular columnar body extending from a first end to a second end along a rotation axis. At least a part of the columnar body may correspond to an insert including a cutting edge at the first end. The insert may include therein a flow path extending from a side of the first end toward a side of the second end. A width of the flow path along a radial direction of the circular columnar body may be smaller than a width of the flow path along a circumferential direction of the circular columnar body in a cross section orthogonal to the rotation axis.