Processing Machinery
5 مشاهدة
PMMA Drilling Cracking
ظاهرة المشكلة
Hole openings chip and crack when drilling PMMA
تحليل الأسباب
The cutting angle of ordinary twist drills is unsuitable for brittle materials, and stress concentration at the hole opening causes chipping and cracking; 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
الحل
Use acrylic special drill bits; low-speed feed; backing plate on the back side; chamfer hole edges; after adjustment, take samples continuously 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
الخلاصة الأساسية
PMMA drilling uses special tools plus backing plates; 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
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