Processing Machinery
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PA66 intake manifold
Fenómeno do problema
The intake manifold shows weld line leakage during engine bench testing
Análise das causas
The manifold vibration weld is subject to pulsating pressure and thermal cycling, and insufficient weld design strength or improper welding parameters form weak areas; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience
Solução
Select vibration welding grade glass fiber reinforced grades; design weld rib width according to burst pressure; bench verification according to pulsating cycles; after adjustment, take continuous samples to verify the effect, confirm stability before resuming mass production
Conclusão principal
Intake manifold welds are specially verified according to pulsating burst working conditions; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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