Fastener Inspection Sorting Machine Recirculation Chute
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Solution Overview
Problem
Existing automated inspection and sorting machines for bulk fasteners often fail to effectively separate conforming and non-conforming fasteners, particularly under conditions of system faults such as incorrect spacing, orientation, and speed, leading to potential mixing and re-inspection inefficiencies.
Innovation Solution
An automated inspection and sorting machine that includes a feed system with conveyors and cameras for optical inspection, a central controller to classify fasteners as conforming, undetermined, or non-conforming, and a recirculation chute for re-inspection of unsatisfactorily inspected fasteners, along with air nozzles for precise sorting into designated chutes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated inspection and sorting machines process fasteners in rapid succession through inspection, decision-making, and sorting phases, then productivity is improved, but sorting accuracy deteriorates under system faults such as incorrect spacing, orientation, and speed
Solution Approach 1:
The system performs preliminary actions by detecting system faults (incorrect spacing, orientation, speed) before they cause sorting errors. The fault detection mechanism identifies problematic conditions in advance, allowing the system to take corrective actions such as adjusting conveyor speed or repositioning fasteners before the sorting decision is made, thereby maintaining both high productivity and accurate sorting.
Solution Approach 2:
The system implements feedback by continuously monitoring fastener positioning, orientation, and speed during the inspection process. When deviations from expected parameters are detected, the system provides feedback signals to adjust the conveyor system or trigger re-inspection, ensuring that sorting accuracy is maintained even at high processing speeds. This closed-loop control enables the system to self-correct and maintain precision without reducing throughput.
2Productivity
If the machine ejects fasteners into separate chutes based on inspection results, then sorting efficiency is improved, but conforming and non-conforming fasteners may mix when system faults occur
Solution Approach 1:
The system takes preliminary action by detecting potential ejection failures or system faults before they result in mixed fasteners. The fault detection system identifies issues such as nozzle failures, chute obstructions, or timing errors in advance, allowing the system to pause ejection, alert operators, or trigger re-inspection of affected fasteners, thereby preventing mixing while maintaining efficient sorting operations.
Solution Approach 2:
The system uses feedback mechanisms to monitor the ejection process and fastener segregation in real-time. When deviations from expected sorting patterns are detected (such as fasteners landing in wrong chutes or ejection timing errors), the system provides feedback to correct the sorting process or trigger re-inspection, ensuring reliable segregation without sacrificing sorting efficiency.
3Loss of time
If the machine discards non-conforming fasteners immediately after inspection, then loss of time is reduced, but re-inspection of improperly inspected fasteners becomes necessary
Solution Approach 1:
The system performs preliminary action by detecting inspection quality issues (such as obscured views, incorrect lighting, or positioning errors) before final inspection decisions are made. When inspection reliability is compromised, the system proactively flags these fasteners for re-inspection rather than making erroneous discard decisions, thereby maintaining short inspection cycles while ensuring no defective fasteners are missed.
Solution Approach 2:
The system implements feedback by continuously evaluating the quality and reliability of each inspection. When inspection conditions are suboptimal (such as poor image quality or detection uncertainties), the feedback mechanism triggers re-inspection of the affected fasteners. This ensures that the majority of fasteners proceed through the inspection cycle quickly while only those with inspection uncertainties undergo re-inspection, balancing speed and reliability.
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
Enhances the efficiency of the inspection and sorting process by accurately segregating fasteners and potentially eliminating re-inspection of non-conforming items, while detecting system faults in real-time to improve sorting accuracy.
Implementation Method 1
The upper conveyor includes a magnetic wheel for inverting the fasteners from the lower conveyor
Implementation Method 2
The feed system additionally includes a hopper and a vibrating drum for introducing fasteners onto the conveyors one by one in a linear fashion
Implementation Method 3
Conforming fasteners are ejected via an air stream from an air nozzle into a chute for conforming fasteners
Data Source
AI summary
An inspection and sorting machine and a related method of operation are provided. The inspection and sorting machine includes an inspection system that outputs a first signal corresponding to a fastener condition and a second signal corresponding to an inspection condition. Based on the inspection system output, a controller determines whether a fastener is classified as conforming or whether the fastener is classified as undetermined. Conforming fasteners are diverted into a conforming parts chute, and undetermined fasteners are diverted into a recirculated parts chute. The remaining fasteners are diverted into a reject chute. The undetermined fasteners are recirculated into the inspection and sorting machine for re-inspection.