Processing Machinery
7 visualizaciones
PPO Product Cracking Delayed Failure
Fenómeno del problema
[Problem Phenomenon] PPO products pass factory inspection but crack after assembly or a period of use
Análisis de la causa
Residual internal stress is released with delay and cracks under load, temperature or media; stress relaxation and creep redistribute assembly stress; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
Anneal high-stress parts after molding; design assembly torque and interference according to the material's creep characteristics; perform fracture analysis on failed parts to locate the stress source; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
PPO delayed cracking is a residual stress debt; annealing plus assembly design prevents it; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!