Milling System with Sensor-Based Roll Gap Control

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Solution Overview

Problem

Existing milling systems lack autonomy and efficiency in adjusting roll gaps and monitoring wear, leading to suboptimal particle size reduction and increased maintenance needs.

Innovation Solution

A milling apparatus with a pair of grinding rolls and a control assembly that includes sensors and actuators to adjust roll gaps and monitor wear, using a processor to control the operation based on real-time data from sensors, ensuring optimal particle size reduction and minimizing maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If manual monitoring and adjustment of roll gaps is used, then device complexity is reduced, but manufacturing precision and productivity deteriorate due to suboptimal particle size reduction

Engineering Contradiction:

Improveparticle size reductionVSAvoidcontrol assembly with sensors and actuators

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The milling system automatically monitors and adjusts roll gap and wear parameters without human intervention. Sensors detect wear and position changes, while actuators automatically adjust the roll gap to maintain optimal particle size reduction, enabling the system to serve itself

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The control assembly continuously monitors mill operation parameters including roll wear and gap position using sensors. This feedback information is processed by a controller that automatically adjusts actuators to maintain optimal grinding conditions, creating a closed-loop control system that improves manufacturing precision

Inventive Principle:

Principle #23Feedback

2Manufacturing precision

If frequent manual inspection and adjustment of grinding rolls is performed, then manufacturing precision is maintained, but loss of time increases due to increased maintenance needs

Engineering Contradiction:

Improveparticle size reduction consistencyVSAvoidmaintenance downtime

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The system continuously self-monitors roll wear and gap position through integrated sensors, automatically detecting when adjustment is needed without requiring manual inspection. This eliminates downtime associated with frequent manual checks while maintaining consistent particle size reduction

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The sensors continuously monitor roll wear and gap position in advance, detecting deviations before they significantly impact particle size reduction. This allows proactive adjustment to maintain precision without waiting for manual inspection intervals

Inventive Principle:

Principle #10Preliminary action

3Productivity

If automated sensors and actuators are added to monitor and adjust mill operation, then productivity improves through optimal particle size reduction, but device complexity increases

Engineering Contradiction:

Improvemilling efficiencyVSAvoidcontrol assembly structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The control assembly serves multiple functions: sensors monitor both roll wear and gap position, the controller processes multiple parameters simultaneously, and actuators adjust roll gap while coordinating with feed rate control. This multi-functionality improves productivity without proportionally increasing complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The monitoring and control functions are merged into an integrated control assembly where sensors, controllers, and actuators work as a unified system. This consolidation manages complexity by combining multiple functions into a coordinated whole rather than separate independent systems

Inventive Principle:

Principle #5Merging (Combining)

4Manufacturing precision

If roll gap is manually adjusted based on experience, then ease of operation is maintained, but manufacturing precision deteriorates due to suboptimal adjustments

Engineering Contradiction:

Improveroll gap positioning accuracyVSAvoidautomatic control operation

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

Manual mechanical adjustment of roll gap based on operator experience is replaced with an automated control system. Sensors precisely measure gap position and wear, while actuators make accurate adjustments controlled by a processor, replacing human judgment with precise measurement and control

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 achieves efficient particle size reduction and extends the lifespan of grinding rolls by automatically adjusting roll gaps and detecting wear, reducing downtime and improving overall milling efficiency.

Implementation Method 1

a sensor assembly including at least one sensor and a sensor interface for receiving data signals from the at least one sensor to sense an aspect of the operation of the apparatus

Methodology Applied

Scientific EffectWear detection: Wear

Implementation Method 2

a pair of grinding rolls each having a plurality of grinding teeth thereon with the rolls being separated by a roll gap through which the particles pass

Methodology Applied

Scientific EffectAbrasion: Abrasion