1 4/12/2011

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2 Global Presence 2

3 Lasers in Fuel Cell Manufacturing Preco Inc., Core focus -Laser Process Research & Development -Laser Contract Manufacturing -Laser System Equipment Design and Build -Flat Bed and Rotary Die Press Equipment -High Tolerance Screen Printing Equipment 3

4 Contract Manufacturing Services Product Overview Contract Manufacturing Services ( CMS ) Preco is one of the largest laser-based contract manufacturers in North America with more than 42 internally-developed proprietary systems. Provides laser-based CMS including feasibility testing, process testing, pilot production, and complete short- and long-term outsourced production. CMS enables the Company to optimize systems prior to sale and installation at the customer s site. Currently provides CMS to approximately 280 customers, including 3M, Abbott Laboratories, Caterpillar, Delta Faucet, General Mills, and many others. Diversity of markets: Automotive, Flexible Packaging, Medical, Flex Circuits, Abrasives, Cell Phones, Heavy Metals. Laser Welding Exhaust Components Laser Cutting of Acrylic Lenses for Automotive Graphic Overlays Flexible Packaging 4

5 Fuel Cells and Lasers Preco, Inc Producing Fuel Cell Components with Lasers High Speed Welding of Metal Bipolar Plates High Speed Cutting of Metal Bipolar Plates Hermetic welding of pressure vessels and valves High speed micro hole drilling in metals and polymers Converting carbon fiber/polymer materials, i.e. MEA, GDL, Gaskets, Packaging 5

6 Preco, Inc. 6

7 Preco, Inc. 7

8 Preco, Inc. 8

9 Thin metal high speed welding 9

10 Laser Polymer Processing 10

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15 High Powered Lasers In Contract Production at Preco, Inc 1 12kW C kW C kW C kW C kW Nd:YAG 1 3.5kW C kW C kW to 2kW CO W single mode fiber 2 1 kw multi mode fiber 1 6 kw multi mode fiber 1 10 kw multi mode fiber Greater than W to 750 W lasers Over 35 total laser processing stations 15

16 Laser Wave length Absorptio n TiO 2 Color Pigments Laser Pigments Ultraviolet l t Infrared Excimer 400 nm 800 nm Nd:YAG CO ArF: 193 nm 2 KrF: 248 nm 532 nm 1064 nm 9.4 µm Diode XeCl: 308 lasers 10.6 µm nm nm nm Volume absorber Surface absorber 16

17 Absorption Reflection( %) Ag = 0.97 Al = 0.94 Au = 0.99 Be = 0.61 Cr = 0.63 Cu = 0.96 Fe = 0.64 Mo = 0.67 Ni = 0.72 Pt = 0.75 W =

18 Laser Tube Welding 18

19 Laser Tube Welding and Cutting 19

20 Laser Lap Welding Of Stainless Sheet Metal Evaporator Panels 20

21 High Volume Laser Welding Including Integrated 100% Vision Inspection 21

22 Laser Spot Welding About 2 seconds For 36 welds 22

23 Laser Micro Welding 23

24 Laser Welding Advantages Laser Can be Shared Between Stations Narrow Fusion Zone Minimal i Heat Affected Zone Minimal Shrinkage and Distortion Accurate Weld Placement Non-Contact Process Fast Travel Speeds 24

25 Laser Welding Limitations Carbon content generally should be less that.3 If higher considerations must be made for hardness Components must be clean and oil free Close fit-up tolerance is required Vaporization of some elements can occur during welding process Inert cover gas required to reduce oxide propagated corrosion zone 25

26 Butt Joint Gap T Gap < 10% of T for good welds More weld stress - prone to cracking Stress Riser (Restraint) Incomplete Penetration 26

27 Lap Joint T W W > Tf for full strength Root porosity can be more dti detrimental tl 27

28 Lap Joint Stress risers at interface Gap < 10% T for good welds T Gap 28

29 Requirements on Process Monitoring Quality assurance in mass production Cost efficiency zero failure tolerance Traceability of bad welds 100%- Documentation Immediate discharge of bad parts no further processing of bad parts, no consumer recalls Continuous optimization of the process Reduction of the reject rate Trend analysis and visualization of warning signals avoid production downtimes Quality assurance within the process cycle Reduction of visual and destructive testing 29

30 Fiber laser weld on SS 30

31 Laser welded automotive gear 31

32 Laser welded 410 SS diaphragm 32

33 Mild Steel Welding 11.2mm 33

34 Comparison of Welding by FL and CO 2 Lasers Mild steel t= 12 mm IPG YLR TLF turbo P L = 10.2 kw v w = m/min E = 2,8 kj/cm + 32 % -18 % + 61 % P L = 13.5 kw v w = 1,8 m/min E = 4,5 kj/cm 34

35 Welding of Mild Steel 16 mm S355, t = 16 mm P L = 10.5 kw v W = 1.2 m/min Laser + MAG S355, t = 16 mm P L = 10.5 kw v w = 1,2 m/min U = 23+7 V I = 203 A v wfs = 6.0 m/min 35

36 Mild Steel Welding 36

37 10kW CW Ytterbium Fiber Laser Pipeline Steel X70, 12 mm Laser Power: 10.2 kw Fiber Core: 200 µm Fiber Length: 80 m BPP: 11.5 mm x mrad Welding Speed: 2.2 m/min 37

38 Welding of Aluminium Laser MIG hybrid welding EN-AW 6008, t = 4 mm SZW AlSi5 P L = 10.5 kw v S = 8 m/min Laser MIG hybrid welding EN-AW 6008, t=8 t8 mm SZW AlSi5 P L = 10.5 kw v S = 8 m/min 38

39 Preco Headquarters 9705 Commerce Parkway Lenexa, Kansas Toll Free: Phone: Fax: Preco Inc. Preco Somerset 500 Laser Drive Somerset, Wisconsin Toll Free: Phone: Fax: Preco Ohio Troy, Ohio USA Preco United Kingdom Canterbury, Kent, UK Preco LMI AB Nas, Sweden Preco Miwa Tianjin, China Preco High Technology Tianjin, China 39