Machine Tool Top-Cut Verification for Workpiece Positioning
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Solution Overview
Problem
The existing machine tools face challenges in maintaining accurate positioning of workpieces during the top-cut process due to supply errors, leading to potential defects in machining accuracy.
Innovation Solution
A machine tool system equipped with a spindle, cutter, sensor, and controller that executes an abnormality detection process before the top cut, allowing for retry processes and setting user-defined parameters to ensure accurate positioning, and includes a cut-off tool breakage detection process using a sensor to prevent defective products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the end of the workpiece is cut off with a cut-off tool to position the end surface with precision, then positioning accuracy of the end surface is improved, but if a supply error occurs, the cutting off will fail and positioning accuracy deteriorates
Solution Approach 1:
The sensor detects the presence of the workpiece in the predetermined area before the top cut process is executed. This preliminary detection action prevents the cutting operation from proceeding when the workpiece is not properly positioned, thereby avoiding failed cuts and ensuring reliable positioning accuracy.
Solution Approach 2:
The sensor provides feedback information to the controller about whether the workpiece exists in the predetermined area. The controller uses this feedback to determine whether to execute the top cut process, creating a closed-loop control system that ensures reliable operation and prevents defective products.
2Productivity
If the top cut process is executed without verification to maintain continuous operation, then productivity is improved, but machining accuracy deteriorates due to potential supply errors
Solution Approach 1:
The sensor verification is performed as a preliminary action before the top cut process. This quick detection step ensures that only properly positioned workpieces undergo cutting, maintaining high machining accuracy while enabling continuous operation by automatically preventing failures rather than requiring manual intervention.
Solution Approach 2:
The system performs self-verification through the sensor and controller to detect supply errors and prevent defective cuts. This automated self-service mechanism maintains both high productivity through continuous operation and high machining accuracy by eliminating the need for manual checking.
3Reliability
If a sensor detection process is added before the top cut process to detect workpiece presence, then reliability is improved, but device complexity increases
Solution Approach 1:
A sensor is introduced as an intermediary component between the workpiece supply system and the top cut process. This sensor acts as a mediator that provides simple presence/absence detection, improving reliability without requiring complex analysis or control algorithms.
Solution Approach 2:
The detection function is extracted as a separate, dedicated sensor component rather than being integrated into the existing control system. This modular approach improves reliability through specialized detection while minimizing the increase in overall system complexity by using a simple, standalone sensor.
Data Source
AI summary
A machine tool capable of preventing production of a defective product. The processing unit determines whether the workpiece exists in the predetermined area. In the event that the workpiece exist in the area, the processing unit execute the top cut process. In the event that the workpiece does not exist in the area, the processing unit determines that the workpiece is in the abnormal position.