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In-service performanceTechnical performance
Weight Total cost of the function
Safety (crash management,
energy absorption, exceptional loads resistance)
y (stifffness)
f e
t
(laser welding, …)
Stage in the life of the product ArcelorMittal contact
Preliminary design BIW experts
Co-engineeringdevelopment
Resident engineerNoble Intl. development engineer
Industrialization Noble Intl. plant project manager
Series production Client Technical Support (CTS)
Identification of applicationPreliminary blank concept
Blank optimizationfeasibility study
Detailed specificationof part
Quality follow-up
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ZD
ZL
ZA
P
Definition
Rounded height
Sheared height
Breaking height
Breaking depth
ZD (%)
ZL (%)
ZA (%)
P (mm)
Parameter measurementCross sectional view
Input data Results
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3
Homogenous welding
-3 -2 -1 0 1 2
500
0
100
200
300
400
Hardness (Hv)
Distance from weld seam
Effect of the dillution of the carbon content
LT = 0,25 LE + 2xLM + L S
Cross sectional view Parameter measurement
LE
LS ZF
LE
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Complex shaped blanks
High tool cost per part,
try to review the design of
the tailor welded blanks
Low volume car
< 50,000 vehicles/year
Simple shaped blanks
Shear blanking
Tool blanking Tool blankingHigh volume car
> 400,000 vehicles/year for increased productivity
UTSE %
Steelgrade A and B
Weld
LongitudinalTransverse
Longitudinal Transverse
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1.0 mm
2.0 mm
1.5 mm
2.0 mm
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0.3170.3300.3440.3570.3710.3840.3970.4110.4240.4380.4510.4650.478
Safety strain
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Major strain
-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4
Minor strain
Fo
FLC FB450
Safety margin
rming limitTrue values
Weld spot
Simulation with LWB FLC for material A1 and B1LWB FLC allows to predict rupture by stamping simulation
Simulation without LWB FLC for material A1 and B1
Rupture prediction
Part feasibility seams OK
Fracture on real part
0.05
0.00
0.05
0.10
0.15
0.20
0.25
0.30
-0.10 -0.05 -0.00 0.05 0.10 0.15 0.20 0.25
Minor strain
Major strain
0.1
0.0
0.1
0.2
0.3
0.4
0.5
-0.3 -0.2 -0.1 0.0 0.1 0.2 0.3
Minor strain
Major strain
A1 B1
A1 B1
Step 1
Advanced
engineering
Step 2
Vehicle concept
and design
Step 3
Tool development
and prototyping
Step 4
Production
> Innovative solutions
> Development planning
> Introduction of new
steel products and
technologies
> Stamping
> Monitoring of working
groups for the
industrialization
of new solutions
> Parts and process
design support
> Forming and joinin g
assistance:
- Stamping
- Simulation
- Tools design
- Tools optimization
- etc.
> Quality management
> Production assistance
> Cost reduction
5 years + 2-5 years < 18 months Current vehicle
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Materials Cutting Stamping Assembly Logistics
Taken into account in ArcelorMittal Auto cost approach
Engaged material Machines> Depreciation> Maintenance> Consumables (including energy)> Surface area used
Tools> Depreciation> Maintenance
Labour> Operators> Supervisors> Absenteeism rate
Process> Capacity utilization> Speed> Added value loss due to rejects
Machines> Depreciation> Maintenance> Consumables (including energy)> Surface area used
Tools> Depreciation> Maintenance
Labour> Operators> Supervisors> Absenteeism rate
Process> Capacity utilization> Speed> Added value loss due to rejects
Machines> Depreciation> Maintenance> Consumables (including energy)> Surface area used
Tools> Depreciation> Maintenance
Labour> Operators> Supervisors> Absenteeism rate
Process> Capacity utilization> Speed> Added value loss due to rejects
Inventory costs> Surface area> Inventory value> Consignment inventory
Handling> Labour> Packaging> Pallets (delivery and intermediate inventories)
Flow managementcost> References management> Invoicing> Quality control
Rejects
Scrap and rejects
recycling
Matic addition
Scraps
> Including tails of
coils
Volume Cost of capitalTaxes
Specific development cost(engineering studies, prototyping,fine tuning time of tools)
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