DFM FRAMEWORK for castings

11, Feb. 2025

medical divce heat treatment T6 A356 WAX CASTING

 

      1.Determine second tier supplier (Eg. Casting etc.)
2.DFM presentation
a)Manufacturing process (Eg. Gravity cast etc.)
b)Raw material used
•Supplied as per spec or mixed
•Recycled %
c)Mold design (Highlight if any deviations from drawing)
•Part tooling design
•Datum, parting line and draft angle
•No. of cavities
•Gating, ejector pin size and location
•Part identification, risers, core and sliders locations (if applicable)
 
d)Mold flow (if applicable)
•Verify mold design
•Filling order and time
•Solidification order
•Porosity risk
e)Heat Treatment (if applicable)
•Standards and specifications
•Capability and capacity
3.Second tier FA part qualification (after HT)
a)Material mechanical properties and chemical composition analysis
b)X-ray
c)Ultrasonic
d)Cross sectioning
e)Test quantity and area to be determined by Leica
4.Machining
a)Jigs and fixture design concept
•Datum point
•Clamping method
•Process sequence

Special tooling if required

 

5.Inspection
a)Measurement methodology
b)Inspection fixture if required
c)Special gauges if required
d)Cosmetic (if applicable)
6.Secondary Process (Eg. surface treatment)
a)Standards and specifications
b)Inspection methodology
7.DFA (if applicable)
a)Review 3D assembly
b)Review assembly requirement
•Fitting and stack up tolerance
•Torque requirement
•Jigs and fixtures concept
•Functional test (if applicable)
c)PFMEA
d)Inspection criteria
e)Process documentation
f)Work cell set-up and material flow
8.Packaging and transport requirement
a)Packaging design and WI
b)Packaging test (if applicable)