PCB Line Loading Control During Maintenance Stops
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Solution Overview
Problem
In manufacturing lines for board products, maintenance errors can lead to prolonged production halts, causing excess circuit board removals due to buffer device overflow, resulting in increased waste and decreased production efficiency.
Innovation Solution
A manufacturing management device that determines when maintenance is necessary and strategically stops loading circuit boards onto upstream devices, reducing the number of boards held between reference and maintenance target devices, thereby minimizing removals and maintaining production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the production line continues loading circuit boards during maintenance, then production throughput is maintained, but the number of removed circuit boards increases due to buffer overflow
Solution Approach 1:
The system performs preliminary detection of maintenance requirements and proactively stops board loading onto upstream devices before maintenance begins. This advance action prevents buffers from overflowing with boards that would later need to be removed, thereby reducing waste while maintaining continuous production flow downstream
Solution Approach 2:
The determination device continuously monitors production device status and provides feedback to the conveyance management device. When maintenance is detected as necessary, this feedback triggers automatic adjustment of board loading rates upstream, creating a closed-loop control system that dynamically balances production throughput with waste reduction
2Loss of substance
If the production line stops loading circuit boards upstream when maintenance is needed, then the number of removed circuit boards is reduced, but production efficiency decreases due to buffer stagnation
Solution Approach 1:
The system segments the production line into upstream and downstream sections relative to the maintenance target device. By applying different control strategies to each segment—stopping loading upstream while maintaining flow downstream—the system reduces waste locally without causing overall production stagnation
Solution Approach 2:
The conveyance management device applies local control by adjusting board loading rates specifically at upstream devices near the maintenance target, rather than uniformly across the entire production line. This localized adjustment reduces circuit board waste in the affected area while preserving production efficiency in unaffected areas
3Reliability
If maintenance is performed on a production device, then device reliability is improved, but production time is extended due to production halt
Solution Approach 1:
The system performs preliminary detection of maintenance requirements and initiates maintenance scheduling before critical failures occur. By planning maintenance in advance and coordinating it with reduced upstream loading, the system minimizes production disruption while ensuring maintenance is performed, thereby improving reliability with minimal time loss
Solution Approach 2:
While maintenance is being performed on one device, the system maintains continuous production flow by preventing buffer overflow upstream and allowing downstream devices to continue operating. This ensures that useful production action continues elsewhere in the system, reducing overall production time loss while maintaining device reliability
Data Source
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AI summary
A manufacturing management device includes a determination section configured to determine the necessity of maintenance on any of the multiple production devices during production by the production line; and a conveyance management section configured to stop loading circuit boards, at a predetermined time, onto a reference device among the multiple production devices when it is determined that maintenance is necessary, the reference device being positioned upstream in the production line from a maintenance target device having a cause for maintenance.