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)