Rotary Cutter Throttle System for Stable Mist Spraying
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Solution Overview
Problem
Conventional rotary cutters with peripheral-type supply paths face issues in stably spraying a mist of cutting fluid and air due to centrifugal force causing intermittent and pulse-like output, making it difficult to apply to small diameter tools and maintaining mist form.
Innovation Solution
A rotary cutter design featuring a chuck with a cylindrical cover, a hollow center cavity, and a throttle system that allows intermittent connection between supply paths to concentrate and spray a fluid-air mixture without returning to liquid form, using a front throttle chamber with expanded diameter and a rear throttle chamber with smaller diameter to maintain pressure and suppress pulsation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a peripheral-type supply path is used to supply cutting fluid in a rotary cutter, then the supply path can be widely applied to various rotary type machine tools, but the centrifugal force effect on the fluid becomes relatively large causing mist to return to liquid form and creating intermittent pulse-like output
Solution Approach 1:
The supply path is divided into multiple sections: a peripheral supply path for initial fluid introduction, a central supply path for stable mist delivery, and a mist generation section. This segmentation allows the peripheral path to serve various machine tools while the central path ensures reliable mist spray by minimizing centrifugal force effects on the mist-forming fluid.
Solution Approach 2:
A mist generation section acts as an intermediary between the peripheral supply path and the cutting portion. This intermediary converts liquid cutting fluid into mist form before delivery, allowing the peripheral supply path to function across different machine tools while the mist generation section ensures stable mist output by reducing the impact of centrifugal force.
2Adaptability or versatility
If cutting fluid is supplied from a location separated from the center of rotation, then the supply path is not limited to mechanical construction, but the centrifugal force effect increases causing unstable mist spray
Solution Approach 1:
The supply system is segmented into a peripheral supply path that can accommodate various machine tool configurations and a central supply path that ensures stable mist delivery. The segmentation allows flexibility in machine tool application while maintaining mist stability through the central path design.
Solution Approach 2:
The supply path transitions from a peripheral location (far from center of rotation) to a central location (close to center of rotation) within the rotary cutter. This dimensional change in the fluid supply path reduces the radius of rotation, thereby minimizing centrifugal force effects and stabilizing the mist form during delivery to the cutting portion.
3Reliability
If a center-type supply path is used, then connection from non-rotating to rotating section is easier and centrifugal force effect is reduced, but the mechanical construction is limited to paths penetrating completely through the center of rotation
Solution Approach 1:
The supply path is segmented into a peripheral section for flexible connection to various machine tools and a central section for stable mist delivery. This segmentation combines the advantages of both peripheral and central supply paths, achieving ease of connection while maintaining mist spray stability.
Solution Approach 2:
The invention merges the peripheral supply path approach (easy connection to various machine tools) with the central supply path approach (reliable mist delivery with reduced centrifugal force). The combined system includes both peripheral and central supply paths working together to achieve both ease of connection and mist spray stability.
4Speed
If increasing supply pressure is used to overcome centrifugal force, then mist can be supplied faster, but mist still returns to liquid form when contacting bent or curved portions of the supply path
Solution Approach 1:
The supply path is segmented into sections with different orientations: a peripheral supply path for initial fluid introduction and a central supply path for mist delivery. The central section is designed to minimize bends and curves, allowing high-speed mist supply while maintaining mist form by reducing contact with curved surfaces that would cause liquid form regression.
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 design enables stable mist spraying from the tip end section of the rotary cutting tool, reducing pulsation and maintaining the mist form effectively, even in small diameter tools, by using a throttle system that manages pressure and flow to prevent fluid from returning to liquid form.
Implementation Method 1
a throttle system that allows intermittent connection between supply paths to concentrate and spray a fluid-air mixture without returning to liquid form, using a front throttle chamber with expanded diameter and a rear throttle chamber with smaller diameter to maintain pressure
Implementation Method 2
mist that is supplied from the perimeter of the main rotating shaft returns to a liquid form when it comes in contact with the inner wall of the supply path due to centrifugal force
Data Source
AI summary
The object of the invention is to stably spray cutting fluid in a good mist form, when cutting fluid and air are supplied from the surrounding area and cutting fluid is sprayed in a mist form from the tip end section of a rotary cutting tool. The rotary cutter of the present invention sequentially feeds a mixture of cutting fluid and air through a supply pipe 4, first supply path b in a cover 3, second supply paths c, d in a chuck 2, a hollow center cavity (front throttle chamber d, throttle 24a, and rear throttle chamber e) in the chuck, and a third supply path g in a rotary cutting tool 1. The first supply path and second supply path are intermittently connected when the respective openings thereof face each other as the cover and chuck turn relative to each other; the second supply path sprays fluid toward the throttle; the front throttle chamber is formed such the diameter thereof expands from the second supply path; the throttle is formed such that the diameter thereof is less than the smallest diameter of the second supply path; the rear throttle chamber is formed by the rear end surface of the rotary cutting tool and the inner conical surface on the down-flow side of the throttle when that rear end surface and inner conical surface on the down-flow side come in close contact with each other; and the front throttle chamber is formed such that the capacity thereof is greater than that of the rear throttle chamber.