Cutting Insert Coolant Layout for Stable Chip Curling
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Solution Overview
Problem
Existing cutting tools experience unstable chip curling and entanglement due to coolant injection angles, leading to poor chip discharge performance when coolant is injected from both front and rear sides of the chip.
Innovation Solution
The cutting tool design includes a holder with two flow paths and outflow ports positioned above the cutting insert, with imaginary lines representing coolant flow directions intersecting outside the insert, ensuring identical injection angles and stable chip curling, enhancing chip discharge and cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant is injected from both front and rear sides of the chip, then cooling effect is improved, but chip curling stability deteriorates
Solution Approach 1:
The patent applies local quality by directing coolant injections to specific locations: the first coolant is injected onto the front surface of the chip at the chip generation point, while the second coolant is injected onto the rear surface of the chip at a position separated from the chip generation point. This localized differentiation allows each coolant to perform its function optimally without interfering with chip curling stability.
Solution Approach 2:
The patent introduces a spatial dimension separation by positioning the two coolant injection points at different locations along the chip length (front surface vs. rear surface, separated by a specific distance). This dimensional separation in space allows both coolants to coexist without causing chip entanglement, resolving the contradiction between cooling effectiveness and chip stability.
2Temperature
If coolant injection angle is increased for better cooling, then cooling efficiency is improved, but chip discharge performance deteriorates
Solution Approach 1:
The patent applies local quality by assigning different injection angles to different coolant streams: the first coolant is injected at a first angle relative to the cutting direction, while the second coolant is injected at a second angle. This localized angle differentiation allows optimization of cooling efficiency without compromising chip discharge, as each coolant operates in its designated zone with an appropriate angle.
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 configuration ensures stable chip curling and improved chip discharge performance, providing effective cooling across a wider range of cutting conditions by ensuring coolant injections come into direct contact with chips at the same angle, leading to enhanced cutting tool performance.
Implementation Method 1
The chip can be cooled by a cooling fluid (coolant) injected from the injection port
Data Source
AI summary
A cutting tool may include a holder and a cutting insert. The cutting insert may include a ridge including a corner and a first side. The holder may include a first flow path extending along a first central axis, and a second flow path extending along a second central axis. A line obtained by extending the first central axis may be a first imaginary line, and a line obtained by extending the second central axis may be a second imaginary line, each of the first imaginary line and the second imaginary line is inclined downward. An intersection of the first imaginary line and the second imaginary line is located outside of the cutting insert in a plan view. The first imaginary line intersects with the ridge and the second imaginary line intersects with the first side at a side closer to the second end than the first imaginary line.