Adjustable Nozzle Gear Cutting Tool for Coolant Distribution
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Solution Overview
Problem
Gear cutting tools experience premature wear and reduced service life due to concentrated load application, leading to suboptimal coolant liquid distribution after regrinding, and require frequent replacement even when only part of the cutting edges are worn.
Innovation Solution
A gear cutting tool with an adjustable nozzle that allows coolant liquid to be supplied to optimal positions, even after regrinding, and a machining method that disperses load across multiple blades to extend tool life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the discharge ports are formed at fixed positions on the center side, then the structure is simple, but the coolant liquid cannot be supplied to optimal positions after cutting edges are reground
Solution Approach 1:
The nozzle is designed with an adjustable mechanism that allows its position to be dynamically changed. The nozzle can be moved along the tool body to different positions corresponding to the new cutting edge locations after regrinding, enabling the coolant liquid to be supplied to optimal positions adaptively.
Solution Approach 2:
The nozzle is divided into a movable section and a fixed section. The movable section can be independently adjusted along the tool body, while the fixed section remains in place. This segmentation allows the nozzle to adapt to position changes without requiring complete redesign of the entire nozzle structure.
2Productivity
If the load is concentrically applied only to a specific blade, then the machining process is simple, but the specific blade is subjected to wear or chipping and the gear cutting tool is required to be replaced
Solution Approach 1:
The gear cutting tool is designed with multiple blades arranged circumferentially, and the machining process is configured to periodically engage different blades with the workpiece. By rotating the tool or workpiece, the load is distributed across multiple blades in a periodic manner, preventing any single blade from experiencing continuous concentrated stress.
Solution Approach 2:
The machining process dynamically switches between different blades during operation. As the tool rotates, different blades sequentially engage the workpiece, creating a dynamic load distribution pattern that extends the overall service life of the tool by utilizing multiple cutting edges.
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 adjustable nozzle ensures effective coolant distribution and the load dispersion method significantly extends the service life of the gear cutting tool by preventing continuous high load on specific blades.
Implementation Method 1
a nozzle (120) including a flow channel (123) allowing a coolant liquid supplied to the center hole (113) to flow therein and discharging the coolant liquid toward the plurality of blades (112a)
Data Source
AI summary
To provide a gear cutting tool capable of supplying a coolant liquid to an optimum position even when cutting edges are reground. The gear cutting tool includes the tool body having a plurality of blades on an outer peripheral surface thereof and a center hole, and a nozzle provided in the center hole of the tool body so that a fixed position in the tool body is adjustable. The nozzle includes a flow channel which allows supplied coolant liquid to flow into the center hole of the tool body, and discharge the coolant liquid toward the plurality of blades.