RFQ Drawing Details That Stop Carbon Fiber Plate Rejects
Carbon fiber plates machine differently from metal. A drawing that works for aluminium often fails on CFRP. Suppliers need specific notes to protect edges, control tolerances and avoid delamination.
Drawing Items That Prevent Rejects
|
Drawing Item |
Why It Matters for Carbon Fiber Plates |
|---|---|
|
Thickness and tolerance |
Controls ply count and layup |
|
Hole diameter and position |
Affects drill wander and edge burr |
|
Corner radius |
Prevents edge chipping on thin plates |
|
Chamfer or deburr note |
Protects exposed plies |
|
Surface finish |
Matte or glossy changes machining sequence |
|
Flatness requirement |
CFRP moves under clamping force |
Minimum RFQ Information
Plate size: length × width × thickness
Material: 3K T300 / T700, epoxy resin
Tolerance: standard ±0.1mm or tighter
Hole map: diameter, position, quantity
Edge treatment: chamfer, deburr, peel ply
Quantity and delivery date
Common Drawing Mistakes
No corner radius on interior cuts
Tight metal tolerances applied to CFRP edges
Missing hole position reference point
Unmarked surface side for matte or glossy
No note on chamfer direction
Supplier Questions Before Production
Which side carries the cosmetic surface?
Are holes through or countersunk?
Is flatness checked before or after cutting?
Are sharp corners acceptable for this application?
FAQ
Q: Do carbon fiber plates need a corner radius?
A: Yes. Sharp interior corners cause edge chipping. A 0.5mm–1mm radius reduces rejects.
Q: Can suppliers work from a PDF only?
A: Yes, but DXF or DWG files reduce interpretation errors on hole positions.
Q: What tolerance is realistic on thin plates?
A: ±0.1mm is standard. ±0.05mm is possible with extra inspection.
