Multi-Wire Saw Stroke Setting for Bobbin Position Offset

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Solution Overview

Problem

The manual replacement of bobbins in wire saw devices for slicing processes leads to potential displacement in the mounting position, affecting the unwinding and winding precision of the wire, which is critical for accurate cutting operations.

Innovation Solution

An automatic stroke setting apparatus that includes a driver, traverse, sensor, and controller to measure and adjust the stroke range based on distance variations between bobbins, allowing for precise alignment and correction of the traverse position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual replacement of bobbins is performed, then operation simplicity is maintained, but positioning precision deteriorates due to operator skill variations causing displacement in mounting position

Engineering Contradiction:

Improvebobbin replacement operationVSAvoidbobbin mounting position precision

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent replaces the manual mechanical positioning method with an automated optical measurement system. A sensor automatically measures the distance between the driver and the bobbin, and the controller calculates the offset to adjust the traverse stroke position, eliminating reliance on operator skill for positioning accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system enables self-service through automatic detection and correction. The sensor autonomously measures bobbin position, the controller automatically calculates the required offset, and the system self-corrects the traverse stroke position without requiring manual intervention or expertise from the operator.

Inventive Principle:

Principle #25Self-service

2Device complexity

If manual bobbin replacement is used, then device complexity is reduced, but measurement precision deteriorates as position displacement cannot be accurately detected

Engineering Contradiction:

Improvebobbin replacement systemVSAvoidbobbin position displacement detection

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent introduces an automated measurement system using a sensor and controller to detect bobbin position displacement. This replaces any potential manual measurement methods, providing precise quantitative detection of position changes through automated distance measurement and offset calculation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system implements feedback by measuring the actual bobbin position with the sensor, comparing it to the reference position, calculating the offset, and using this feedback information to automatically adjust the traverse stroke position, ensuring continuous positioning accuracy.

Inventive Principle:

Principle #23Feedback

3Manufacturing precision

If automated stroke setting with sensor is implemented, then positioning precision is improved, but device complexity increases due to additional sensor and controller components

Engineering Contradiction:

Improvetraverse stroke position precisionVSAvoidautomatic stroke setting apparatus

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent employs an optical/electronic measurement system (sensor and controller) to replace manual positioning mechanisms. This substitution achieves high positioning precision through automated distance measurement and digital offset calculation, accepting increased device complexity as a trade-off for superior measurement and control capabilities.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Measurement precision

If sensor is exposed for measurement, then measurement precision is maintained, but reliability deteriorates due to sensor contamination from cutting debris

Engineering Contradiction:

Improvedistance measurement accuracyVSAvoidsensor operational reliability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent introduces a protective cover as an intermediary element between the sensor and the contaminated environment. The cover allows the sensor to remain protected from cutting debris while still enabling the necessary distance measurements, maintaining both measurement precision and sensor reliability through this protective intermediary structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Ensures precise detection and correction of bobbin position displacement, maintaining wire unwinding and winding accuracy, and protects the sensor from contamination.

Implementation Method 1

a sensor configured to measure a distance between the driver and the bobbin

Methodology Applied

Scientific EffectDistance measurement:

Data Source

PatentUS20250222627A1Automatic stroke setting apparatus of cutting device using multi-wire

Publication Date: 2025.07.10 HANWHA SOLUTIONS CORP

AI summary

An apparatus configured to automatically set a stroke range of a cutting device includes: a driver including a rotary shaft on which a bobbin is detachably mounted; a traverse configured to move an attachment point of a wire with respect to the bobbin; and a sensor configured to measure a distance between the driver and the bobbin. The apparatus further includes a controller configured to adjust the stroke range of the traverse to move in parallel based on the distance measured by the sensor. The sensor is configured to measure, as first distance data, a distance between a side of the driver and a side of the bobbin.