Cutting Bit Removal Tracking for Milling Machine Maintenance

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Solution Overview

Problem

The frequent replacement of cutting bits in work machines, such as milling and rotary mixer machines, poses a challenge for operators and owners due to rapid wear, necessitating accurate detection and recording of bit consumption to minimize downtime and optimize maintenance.

Innovation Solution

A system and method for automatically monitoring and tracking cutting bit consumption using a bit removal tool with a movable structure, encoder, and controller, which senses displacement, load, and connectivity to determine bit disconnection and record consumption data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cutting bits are frequently replaced due to rapid wear, then the machine can maintain cutting performance, but machine downtime increases and operational efficiency decreases

Engineering Contradiction:

Improvecutting performanceVSAvoidoperational efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system performs preliminary detection of bit wear conditions and predicts when bits will need replacement, allowing operators to plan bit changes during scheduled maintenance windows rather than experiencing unexpected failures that cause unplanned downtime

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously monitors bit consumption and wear characteristics, providing real-time feedback to operators about bit condition and replacement needs, enabling optimized scheduling of bit changes to minimize downtime while maintaining performance

Inventive Principle:

Principle #23Feedback

2Device complexity

If manual tracking of bit consumption is used, then device complexity is low, but measurement precision and data accuracy are insufficient

Engineering Contradiction:

Improvetracking system complexityVSAvoidbit consumption detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The system replaces manual observation and estimation with automated electronic sensors and encoders that precisely measure bit removal characteristics, transitioning from subjective human judgment to objective instrumented measurement

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system automatically detects and records bit consumption data without requiring operator intervention or manual entry, with sensors and controllers self-monitoring the bit removal process and storing data in memory

Inventive Principle:

Principle #25Self-service

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 system effectively reduces machine downtime by providing predictive wear analysis and optimizing bit replacement schedules, improving operational efficiency and reducing maintenance costs by accurately tracking bit usage.

Implementation Method 1

an encoder that senses a displacement distance of the actuator. The displacement distance of the actuator is indicative of a distance the movable bit removal structure is displaced by the actuator

Methodology Applied

Scientific EffectEncoder sensing:

Data Source

PatentUS11732426B2Systems and methods for counting work machine bit removal

Publication Date: 2023.08.22 CATERPILLAR PAVING PROD INC

AI summary

A method of removing cutting bits from a milling work machine includes engaging a cutting bit connected to a rotary drum of the machine with a bit removal tool, actuating the bit removal tool to disconnect the bit from the machine, sensing a plurality of characteristics of removing the bit from the machine, and determining that the bit has been disconnected from the machine based on the sensed characteristics.