Working Unit Mist Supply Flow Path Guide Plug
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Solution Overview
Problem
In drilling units, the mist supply system often experiences issues where the cutting oil liquefies and accumulates, leading to intermittent discharge of cutting oil from the drill tip, especially when the mist collides with the drilling unit walls or when the flow path volume changes, resulting in poor mist quality and reduced efficiency.
Innovation Solution
A working unit with a cylindrical body, a moving ram, a spindle motor, and a mist supply system that includes a collet holder with a communication hole and a flow path guide plug, allowing direct mist flow to the tool's through-holes, minimizing collisions and maintaining a small flow path volume to prevent liquefaction, and utilizing a compressed air source for all driving mechanisms to ensure efficient mist delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the mist supply path volume is increased to ensure adequate mist flow, then the mist flow rate is improved, but the mist liquefies and accumulates in the flow path
Solution Approach 1:
The patent optimizes the flow path volume parameter to a specific small range, and adjusts the mist generation parameters (air pressure, oil flow rate, mixing ratio) to ensure the mist flows smoothly through the constrained path without liquefying, resolving the contradiction between adequate flow and preventing accumulation
Solution Approach 2:
The patent designs the flow path to be as short and direct as possible, enabling the mist to rapidly pass through the supply system before liquefaction can occur, thus maintaining mist quality while ensuring adequate supply to the tool
2Length of moving object
If the flow path is extended to reach the tool tip, then the mist delivery distance is improved, but the mist collides with wall surfaces and liquefies
Solution Approach 1:
The patent embeds the mist supply path within the tool structure itself (through-holes in the drill), allowing the mist to be delivered directly to the cutting zone without exposed external flow paths where collisions could occur, thus extending effective delivery distance while maintaining mist quality
3Measurement precision
If a complex mist supply system is used to improve mist delivery control, then the mist flow control precision is improved, but the device complexity increases
Solution Approach 1:
The patent integrates the mist generation system and supply path into a unified compact unit, combining the air supply, oil supply, mixing chamber, and flow path into a single integrated assembly that delivers controlled mist flow without requiring multiple separate components
Solution Approach 2:
The patent designs a universal mist supply unit that can be applied to various tool types (drills, reamers, taps) with different specifications, using standardized connection interfaces and adjustable parameters to achieve precise mist control across multiple applications without requiring tool-specific complex systems
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 ensures smooth and high-quality mist ejection from the drill tip, reducing surface roughness and preventing mist liquefaction, while also simplifying the unit's structure and reducing the number of components and assembly requirements.
Implementation Method 1
a mist supply portion (10) supplying foggy mist generated by mixing air from an air supply section (4a) supplying the air and cutting oil from an oil supply unit (4b) supplying the cutting oil to the tool
Implementation Method 2
a flow path guide plug having a mist supply path formed from an inner opening end of the communication hole toward the through-holes of the rear end surface of the tool is internally fitted to the inner cylindrical portion
Data Source
AI summary
To provide a working unit ejecting mist of the excellent quality. A working unit includes a body, a ram, a forward and backward moving mechanism moving the ram forward and backward, a tool, a holding section holding the tool and moving forward and backward integrally with the ram, a spindle motor rotating the holding section, and a mist supply portion supplying mist mixed with air and cutting oil to the tool and works a workpiece while supplying the mist. The tool has through-holes supplying the mist to a cutting blade portion. The holding section includes a collet holding the tool and a collet holder having an inner cylindrical portion into which the collet is inserted with a communication hole to which the mist supplied from the mist supply portion 10 is introduced being formed from the inner cylindrical portion to an outer peripheral portion. A flow path guide plug having a mist supply path formed from an inner opening end of the communication hole toward the through-holes of the tool is internally fitted to the inner cylindrical portion.