Tool Chuck Fluid Nozzle Orientation to Reduce Coolant Scattering

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Solution Overview

Problem

Existing chuck devices face challenges in effectively reducing the scattering of working fluid due to rotational forces, leading to inefficient supply of fluid to cutting tools, and increasing pressure resistance and manufacturing costs.

Innovation Solution

A chuck device with a discharge opening angle calculated using the formula θ=sin−1((n×Dc×π)/(12×105×√{5P}) is set opposite to the rotational direction, reducing the influence of rotational forces and ensuring efficient fluid supply by tilting the discharge direction to the tangential direction of the rotation trajectory.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the nozzle hole is provided at a position away from the cutting tool to reduce rotational force influence, then the working fluid can be discharged more effectively, but the working fluid scatters away before reaching the cutting tool

Engineering Contradiction:

Improveworking fluid supply efficiencyVSAvoidworking fluid scattering

Core Design Contradiction:

ProductivityVSLoss of substance

Solution Approach 1:

The invention changes the discharge direction parameter by setting it opposite to the rotational direction of the chuck device. This parameter change allows the working fluid to be discharged in a direction that counteracts the rotational force, preventing scattering while maintaining effective supply to the cutting tool.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention applies inversion by discharging the working fluid in the opposite direction to the rotational direction of the chuck device. Instead of discharging in the rotational direction or radially outward, the fluid is discharged opposite to rotation, which counteracts the centrifugal force and prevents scattering.

Inventive Principle:

Principle #13The other way round (Inversion)

2Loss of substance

If the discharging pressure of the working fluid is increased to prevent scattering, then the working fluid can reach the cutting tool more effectively, but the pressure-resistant performance requirement and manufacture cost increase

Engineering Contradiction:

Improveworking fluid scatteringVSAvoidmanufacture cost

Core Design Contradiction:

Loss of substanceVSEase of manufacture

Solution Approach 1:

The invention changes the discharge direction parameter to opposite to the rotational direction, which fundamentally alters how the working fluid interacts with rotational forces. This parameter change allows effective fluid supply at lower pressures, avoiding the need for high-pressure systems and reducing manufacturing costs.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention converts the harmful rotational force into a beneficial effect by discharging the working fluid opposite to the rotational direction. The rotational force that would normally cause scattering is counteracted by the opposite discharge direction, allowing effective fluid supply without increasing pressure or cost.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Loss of substance

If the discharging pressure is increased to prevent scattering, then the working fluid can reach the cutting tool, but the working fluid may be bounced back from the cutting tool and scattered about

Engineering Contradiction:

Improveworking fluid scatteringVSAvoidworking fluid supply amount

Core Design Contradiction:

Loss of substanceVSQuantity of substance

Solution Approach 1:

The invention applies inversion by discharging the working fluid in the opposite direction to the rotational direction of the chuck device. This opposite discharge direction prevents the working fluid from bouncing back and scattering, ensuring that a sufficient amount of fluid reaches and remains on the cutting edge.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The invention changes the discharge direction parameter to opposite to the rotational direction, which prevents the working fluid from bouncing back from the cutting tool. This parameter change ensures that the working fluid is supplied effectively without being scattered away after impact.

Inventive Principle:

Principle #35Parameter changes

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

This configuration allows for a significant reduction in fluid scattering, ensuring a substantial amount of working fluid is supplied to the cutting tool, improving efficiency and reducing manufacturing costs by optimizing the discharging direction based on rotational speed and fluid pressure.

Implementation Method 1

the influence of the rotational force of the chuck device affecting the working fluid can be further lessened

Methodology Applied

Scientific EffectRotational force: Centrifugal Force

Data Source

PatentUS10967471B2Chuck device

Publication Date: 2021.04.06 DAISHOWA SEIKI CO LTD

AI summary

Provided is a chuck device that allows appropriate and easy setting of a discharging direction of working fluid. A chuck device configured to be attached to a spindle of a machine tool for gripping a cutting tool, in which inside the chuck device, there are provided a passage in which a working fluid flows and a discharge opening provided at a leading end opening of the passage through which the working fluid is discharged toward to the cutting tool. A discharging direction of the working fluid from the discharge opening is set opposite to a rotational direction of the cutting tool and set with a tilt of an angle calculated by a mathematical formula to a tangential direction of a rotation trajectory of the center of the discharge opening relative to a direction of an axis of the cutting tool.