Motor Drive Casing with Acid-Base Indicator for Cutting Fluid Detection

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Solution Overview

Problem

Existing motor drive devices lack effective methods to notify users of cutting fluid adhesion, which can lead to corrosion and breakdown of electronic components.

Innovation Solution

A motor drive device with a casing that discolors when in contact with cutting fluids, featuring a double-layer structure with a discoloring part that changes color in response to fluid concentration, allowing visual detection of fluid adhesion and guiding fluid flow through grooves to discoloring parts for efficient detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a sealed structure is used to prevent cutting fluid adhesion, then electronic component protection is improved, but thermal dissipation and material costs worsen

Engineering Contradiction:

Improveelectronic component protectionVSAvoidmaterial costs and thermal design

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies color change indication through acid-base indicators embedded in the casing or on indicator sheets. When cutting fluid (containing chlorine or bromine) contacts the casing, it reacts with the indicator to cause discoloration, providing visual notification of fluid adhesion without requiring sealed structures

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The system uses self-detection through chemical reaction between the cutting fluid and indicator material. The casing automatically notifies users of fluid contact through color change without requiring external sensors, sealed structures, or active monitoring systems

Inventive Principle:

Principle #25Self-service

2Ease of manufacture

If traditional non-discoloring materials are used for the casing, then manufacturing simplicity is improved, but cutting fluid detection capability worsens

Engineering Contradiction:

Improvecasing manufacturingVSAvoidcutting fluid adhesion detection

Core Design Contradiction:

Ease of manufactureVSDifficulty of detecting and measuring

Solution Approach 1:

The patent combines ordinary casing materials with acid-base indicator materials to create a composite structure. The indicator material is embedded in or attached to the casing surface, maintaining manufacturing simplicity while adding detection functionality through color change upon cutting fluid contact

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The casing incorporates acid-base indicators that undergo color change when exposed to cutting fluids containing chlorine or bromine. This provides simple visual detection of fluid adhesion without complicating the manufacturing process

Inventive Principle:

Principle #32Color 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

Enables early detection of cutting fluid adhesion, preventing electronic component breakdown and improving thermal design by allowing non-sealed structures, reducing material costs and enhancing detection sensitivity.

Implementation Method 1

The casing may contain an acid-base indicator which discolors when it contacts the cutting fluid

Methodology Applied

Scientific EffectAcid-base indicator color change: Photochromism

Data Source

PatentUS10189135B2Motor drive device capable of notifying adhesion of cutting fluid

Publication Date: 2019.01.29 FANUC LTD

AI summary

A motor drive device is capable of allowing a user to surely recognize that effect when a cutting fluid adheres to a casing. The motor drive device includes an electronic component and a casing that houses the electronic component. A part of the casing changes color when coming in contact with a cutting fluid and the casing may change to different colors based on the concentration of the cutting fluid.