Coolant Turbine for Rotary Cutting Tool
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Solution Overview
Problem
Rotary cutting tools face inefficiencies in coolant delivery due to centrifugal forces acting on coolant during tool rotation, leading to reduced cooling efficiency and uniformity at varying speeds.
Innovation Solution
A coolant turbine with an annular turbine base body and obliquely arranged coolant passages that rotate counter to the cutting tool, reducing relative ambient rotation speed and centrifugal forces, ensuring more uniform coolant distribution at the cutting interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coolant is supplied via delivery holes in the tool holder, then homogeneous and robust cooling is achieved, but centrifugal force accelerates coolant outwardly away from the cutting element
Solution Approach 1:
The patent applies inversion by rotating the coolant supply system (turbine base body) in the opposite direction to the cutting tool rotation. The turbine base body rotates counter to the cutting direction, which reduces the relative ambient rotation speed acting on the coolant and thereby reduces centrifugal forces that drive coolant away from the cutting element.
Solution Approach 2:
The patent implements dynamics by making the coolant supply system rotatable rather than static. The turbine base body can rotate independently in the opposite direction to the cutting tool, allowing dynamic adjustment of coolant delivery to compensate for centrifugal effects at different rotation speeds.
2Device complexity
If static coolant channel design is used, then simple construction is achieved, but trajectory correction cannot compensate for varying rotation speeds
Solution Approach 1:
The patent transforms the static coolant channel design into a dynamic system where the entire turbine base body with integrated coolant passages can rotate. This allows the coolant trajectory to be dynamically adjusted based on rotation speed, improving adaptability while maintaining relatively simple construction through the use of a single rotating component.
3Ease of manufacture
If external nozzle is used for coolant supply, then low cost and easy assembly are achieved, but precise delivery to cutting element is compromised
Solution Approach 1:
The patent merges the coolant supply function with the rotating tool assembly by integrating the turbine base body with coolant passages directly into the tool holder structure. This combination ensures precise delivery to the cutting element while maintaining ease of manufacture through a unified component design that can be assembled as a single unit.
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 solution enhances cooling efficiency and uniformity across different rotation speeds by minimizing centrifugal forces, improving coolant delivery and tool performance.
Implementation Method 1
the coolant is subjected to a centrifugal force by the rotation of the rotary cutting tool and is thereby accelerated outwardly, i.e., away from the cutting element
Implementation Method 2
the turbine base body can be set into rotation by a flow of coolant
Data Source
AI summary
The invention relates to a coolant turbine for a rotary cutting tool, a rotary cutting tool, a coolant turbine module, and a method for operating a rotary cutting tool. The coolant turbine comprises an annular turbine base body having a first front face, an opposite second front face, and a plurality of coolant passages, which are arranged so as to be distributed around a central axis of the turbine base body, said passages having a coolant inlet and a coolant outlet, each of which extends through the turbine base body at least in portions in such a way that the turbine base body can be set into rotation by a flow of coolant.