Parting Blade Holder Cooling Path for High-Pressure Leak Control
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Solution Overview
Problem
Cutting tool assemblies that convey coolant at pressures higher than designed are susceptible to leakage and damage due to the high impact of coolant on the parting blade.
Innovation Solution
A blade holder with a deceleration chamber configured to reduce the speed of coolant before it exits, using a larger cross-sectional area or volume and a barrier surface to deflect the coolant, thereby reducing the impact on the parting blade and minimizing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant pressure is increased to improve cooling effectiveness, then cooling performance is improved, but coolant leakage and damage to the parting blade increase due to high impact
Solution Approach 1:
The deceleration chamber is positioned upstream in the coolant path to reduce coolant velocity before it reaches the parting blade. This preliminary action of slowing the coolant prevents high-impact damage and leakage while maintaining the ability to deliver effective cooling pressure to the cutting edge.
Solution Approach 2:
The deceleration chamber changes the velocity parameter of the coolant by providing a larger cross-sectional area that reduces flow speed. This parameter change allows the system to maintain high pressure for effective cooling while reducing the harmful velocity component that causes blade damage and leakage.
2Temperature
If coolant pressure is increased to improve cooling effectiveness, then cooling performance is improved, but damage to the parting blade increases due to high impact
Solution Approach 1:
The deceleration chamber performs preliminary velocity reduction of the coolant before it contacts the parting blade. This protects the blade's structural integrity by eliminating high-impact forces while preserving the pressure needed for effective cooling of the cutting edge.
Solution Approach 2:
By changing the velocity parameter through the deceleration chamber's geometry, the system separates the beneficial pressure component (for cooling) from the harmful velocity component (causing blade damage), thereby protecting blade integrity while maintaining cooling effectiveness.
3Speed
If a deceleration chamber with larger cross-sectional area is added to reduce coolant speed, then coolant impact is reduced, but device complexity increases
Solution Approach 1:
The deceleration chamber is merged into the existing holder passageway structure rather than being a separate component. This integration achieves coolant velocity reduction while minimizing additional device complexity by combining multiple functions within a unified structural element.
Solution Approach 2:
The holder passageway structure serves multiple functions: it guides the coolant flow, provides structural support, and incorporates the deceleration chamber for velocity reduction. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 deceleration chamber effectively reduces coolant impact on the parting blade, minimizing leakage and allowing for the use of higher coolant pressures without damage, while maintaining effective cooling of the cutting edge.
Implementation Method 1
The relatively increased cross-sectional area or volume, in theory, enables pressure reduction in the deceleration chamber.
Implementation Method 2
Deflection of coolant entering the deceleration chamber, in particular deflection in a direction at least partially, or directly, opposing the entry direction of the coolant, can, in theory, reduce speed of coolant through the chamber.
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
The present application relates to an elongated parting blade (14) comprising: opposing first and second side surfaces (50A, 50B) extending between parallel first and second longitudinal mounting edges (92A, 92B) and between opposing first and second end edges (94A, 94B) which extend transverse to the longitudinal mounting edges (92A, 92B); a cutting portion (30) which is associated with the first longitudinal mounting edge (92A) and the first end edge (94A), and comprising an insert seat (32); and a blade passageway (24) configured for conveyance of coolant and extending from a blade inlet aperture (26) formed in at least one of the side surfaces (50A, 50B) to a blade outlet aperture (28) located at the cutting portion (30); each of the first and second longitudinal mounting edges (92A, 92B) comprises a tapered shape with slanted surfaces for facilitating longitudinal sliding motion; the blade inlet aperture (26) is closer to the second longitudinal mounting edge (92B) than to the first longitudinal mounting edge (92A); and the blade outlet aperture (28) is closer to the first longitudinal mounting edge (92A) than to the second longitudinal mounting edge (92B).