Processing Machinery
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POM Fatigue Fracture
Fenómeno del problema
POM snaps fracture at the root after repeated use
Análisis de la causa
Stress concentrates at the snap root, and fatigue accumulates under cyclic bending; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting
Solución
Enlarge root fillet; limit assembly/disassembly angle; verify by fatigue life testing; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Conclusión clave
Snaps are designed and verified by fatigue life; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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