Machine Tool Mist Collector Control for Precision Machining

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Solution Overview

Problem

Vibration of the mist collector in machine tools can adversely affect machine accuracy, particularly during operations like finishing and precision machining where mist generation is minimal.

Innovation Solution

A control device that acquires information on machining load, spindle movement speed, and rotational speed to determine when to activate or deactivate the mist collector, minimizing vibration impact on machine accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the mist collector is operated continuously to collect mist, then mist collection effectiveness is improved, but vibration adversely affects machine accuracy

Engineering Contradiction:
Improvemist collection effectivenessVSAvoidmachine accuracy
Core Design Contradiction:
ReliabilityVSManufacturing precision

Solution Approach 1:

The mist collector operation is made dynamic by continuously monitoring machining conditions (load, speed, temperature) and adjusting the collector's operation state accordingly. The control device switches between active collection and standby modes based on real-time machining parameters, ensuring mist is collected when needed while preventing vibration-induced accuracy degradation during precision operations.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system changes operational parameters by monitoring machining load, speed, and temperature to determine the appropriate operation state of the mist collector. When machining conditions indicate low mist generation risk (e.g., low load, low speed), the collector transitions to standby mode. When conditions indicate high mist generation risk, the collector activates to maintain mist collection effectiveness.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If the mist collector is activated during all machining operations, then mist is consistently collected, but power consumption increases

Engineering Contradiction:
Improvemist collection consistencyVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

Instead of continuous operation, the mist collector employs periodic activation based on machining conditions. The control device periodically assesses machining parameters (load, speed, temperature) and activates the collector only during periods when mist generation is likely, thereby maintaining consistent mist collection while significantly reducing overall power consumption during low-risk operations.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The system uses its own monitoring capabilities to automatically determine when mist collection is needed, eliminating the need for continuous operation. By self-assessing machining conditions through integrated sensors and control logic, the system activates the collector only when necessary, optimizing the balance between mist collection consistency and energy efficiency.

Inventive Principle:
Principle #25Self-service

3Manufacturing precision

If the mist collector is deactivated during precision machining, then machine accuracy is maintained, but mist may leak out when machining conditions change

Engineering Contradiction:
Improvemachine accuracyVSAvoidmist leakage
Core Design Contradiction:
Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The control device implements continuous feedback monitoring of machining conditions including load, speed, and temperature. This feedback loop enables the system to detect changes in machining state in real-time and respond by activating the mist collector when conditions indicate increased mist generation risk, thereby preventing mist leakage while maintaining accuracy during precision operations.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system takes preliminary action by monitoring machining parameters and predicting when mist generation may occur. By detecting early signs of conditions that lead to mist generation (such as increasing load or temperature), the control device can activate the mist collector in advance, preventing mist leakage before it occurs while maintaining machine accuracy during critical precision machining phases.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS20250284263A1Control device, machine tool, and control method
Publication Date: 2025.09.11 FANUC LTD
  • US20250284263A1 patent drawing
  • US20250284263A1 patent drawing
  • US20250284263A1 patent drawing

AI summary

A control device of a machine tool comprising a table that supports an object to be machined, a main shaft on which a tool is mounted, and a mist collector that collects mist comprises: an acquisition unit that acquires at least one piece of information from among a machining load, a relative movement speed of the main shaft in relation to the table, and a rotational speed of the main shaft; a startup determination unit that determines whether to start the mist collector on the basis of the at least one piece of acquired information; and a collector control unit that automatically controls the mist collector on the basis of the determination details.