1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2011 11 04 Revised See Summary of Revisions B. Witkowski, NA 2004 09 09 Activated J. Crist Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 1 of 11 ADHESIVE, HEM FLANGE, ALUMINUM/STEEL BONDING, WSS-M2G373-C TW
2、O COMPONENT 1. SCOPE The materials defined by this specification are pumpable two-component, induction heat responsive structural adhesives with bondline spacers for bonding metal. Full adhesive strengths are attained after an oven cure. The mixed adhesive is room temperature curing or induction res
3、ponsive. At 23 C the material has 60 minute open time. The materials defined by this specification can replace materials approved to WSB-M2G373-A and WSS-M2G373-B. 2. APPLICATION This specification was released originally for materials to structurally bond metal-to-metal body components such as the
4、inner and outer panels (hem flange) of deck lids, doors, and hoods, etc. This adhesive can be used to bond oily, unclean metal substrates. Bondline spacers are added to one of the components to maintain a 0.25 mm bondline thickness during the hemming process. The Manufacturing Properties and Enginee
5、ring Performance requirements defined in this specification are based upon laboratory coupon testing and define the minimum acceptance criteria for adhesive performance. The assembly process and design for the component will determine the specific adhesive processing parameters for each assembly lin
6、e. The component engineering performance requirements are defined by the component SDS (Sub-system Design Specification). The materials are two component induction heat or room temperature cure responsive structural adhesives. Reactivity build rate of the adhesive to generate required component hand
7、ling strengths for manufacturing is a function of the assembly line processing conditions. Full adhesive strengths are attained after an oven cure. Recommended material oven cure schedules are minimum 171 C metal temperature for 10 minutes and maximum 205 C metal temperature for 30 minutes. Prior to
8、 use, the adhesive must be evaluated under the component production parameters. The choice of substrates, stamping lubricants, stamping plant processing conditions, assembly plant processing conditions and specific design application may affect adhesive performance. Compliance with this specificatio
9、n does not guarantee the adhesive will function for all potential applications on a vehicle. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). ENGINEER
10、ING MATERIAL SPECIFICATIONWSS-M2G373-CPrinted copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 2 of 11 3.2 SYSTEM COMPATIBILITY Initial adhesive approval was based on a specific material system which included the substrate, stamping lubricants and adhesive. The originally a
11、pproved material system was induction heated or room temperature cured followed by an oven cured using specific production process parameters. Substrate choice, stamping lubricants, stamping plant processing conditions and assembly plant processing conditions may affect adhesive performance. If any
12、of these parameters are changed, the adhesive performance must be validated using the new parameters. Shall be a smooth homogenous mixture, free from entrapped air, foreign materials and properties detrimental to normal production operation. The material shall work with all the plant processes (clea
13、ning operations, phosphating process, welding operations, etc.) and shall not deteriorate the performance of phosphating, electrocoat primer or other materials applications. All bulk mastic, sealer or adhesives packaged in minitotes will be returned to the supplier with some residual material in the
14、 bottom of the container from the initial fill. The amount of acceptable residual material should not exceed either 1 gallon or 5/8 inches for a 55 gallon container. It is understood that the residual materials will be the base of the next refill and will not affect the quality of the refilled certi
15、fied product and supplier shall demonstrate via testing of retain materials of production lots of materials to support the above. Supplier shall present data to manufacturing and materials engineering prior to approval, as well as data showing compatibility with process aids used in mini-tote assemb
16、ly (i.e. seal lubricants.) No minitote should be refilled with residual material exceeding the above mentioned amount and should be returned to the plant of origin for follower plate removal and container/residual material disposal. The follower plate will be returned to the supplier after extractio
17、n by the plant of origin for insertion into a new drum. (VOPGNN002) 3.3 MATERIAL PROPERTIES 3.3.1 Weight Per Volume +/- 0.06 kg/L (ASTM D 816) The weight tolerance for any one supplier shall be +/- 0.06 kg/L, based on the recorded weight of their original approved production sample. Reference para 4
18、1. 3.3.2 Viscosity at 25 C, % +/- 5 (SAE J1524, VIS-2, 1.32 mm orifice, 280 kPa, A not to exceed 4 s total cycle time Nominal Heat: 107 C +/- 7 C adhesive bondline temperature Condition at 23 +/- 2 C for 24 h prior to oven cure. ENGINEERING MATERIAL SPECIFICATIONWSS-M2G373-CPrinted copies are uncon
19、trolled Copyright 2011, Ford Global Technologies, LLC Page 11 of 11 Steel Substrates: Cycle Time: 1 s ramp to bondline temperature with a 3 s hold at bondline temperature; not to exceed 4 s total cycle time Nominal Heat: 121 C +/- C adhesive bondline temperature Condition at 23 +/- 2 C for 24 h prio
20、r to oven cure. 4.6.2 Room Temperature Condition at 23 +/- 2 C for 24 h prior to oven cure. 4.6.3 Oven Cure 4.6.3.1 North American Production (FLTM BV 150-05, condition at 23 +/- 2 C for 1 h min, then test) Min Bake: 171 C metal temperature for 10 minutes (not to exceed 20 minutes oven time) Max Bak
21、e: 205 C metal temperature for 30 minutes (not to be less than 40 minutes oven time) 4.6.3.2 European Production Cure according to FLTM BV 150-05, Table 1, minimum and maximum cycle. 4.7 TENSILE PROPERTIES (ASTM D 638, 3 +/- 0.5 mm thick, cure on release paper between 3 mm aluminum panels for 30 min
22、utes at 180 C material temperature, Type I specimen, W = 10 +/- 0.5 mm, G = 50 +/- 0.5 mm, condition at 23 +/- 2 C for 24 h, test at 23 +/- 2 C, 5 mm/minute pull rate, use extensometer or strain gage, test at -40, 23, 50 and 80 +/- 2 C, 5 samples) Modulus of elasticity at 23 C, Typical 2 - 3 GPa Elo
23、ngation at break at 23 C. Typical 5 - 20% Poissons Ratio at 23 C, Typical 0.25 - 0.35 Actual material properties are temperature and formulation dependent. Results are on file with Materials Engineering. 4.8 DYNAMIC MECHANICAL ANALYSIS/DYNAMIC MECHANICAL THERMAL ANALYSIS (Cure on release paper betwe
24、en 3 mm aluminum panels for 30 minutes at 180 +/- 2 C material temperature, sample dimensions are instrument dependent, test 1 sample per batch/lot for 3 batches/lots +/- 0.5 mm for length, width and thickness, report sample size for each batch/lot, 2 C/minute heating rate, bending mode, record at 1 and 10 Hz, -40 to 200 C temperature range, submit Log E vs. Temperature and Log Tan Delta vs. Temperature Curves) Max Tan Delta, Typical 90 - 120 C 5. SUMMARY OF REVISIONS 2011 01 04 Revised 3.4.13
