Molding Process
2 views
PMMA Drilling Technology
Problem Phenomenon
During drilling, the sheet edges chip and crack, hole walls are rough, and threaded connections crack
Cause Analysis
Improper drill bit angle and overly fast feed cause hole edge chipping; the drill bit angle should be 60-90°; thin sheets can be scored and snapped instead of drilled; hole edge stress concentration is the root cause of thread cracking
Solution
①Drill bit angle 60-90° with sufficient cooling; ②low-speed feed to prevent edge chipping; ③enlarge the pilot hole of threaded holes and avoid direct tapping stress; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PMMA drilling relies on angle and cooling; a 60-90° drill bit plus low-speed feed are the basic parameters to prevent edge chipping; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
Was this helpful?
0 people found this helpful
Thank you for your feedback!