1、 WORLDWIDE FASTENER STANDARD WX200 2014 06 30 Printed copies are uncontrolled Copyright 2013, Ford Global Technologies, LLC Page 1 of 4 PERFORMANCE REQUIREMENTS OF ISO METRIC THREADED FASTENERS WITH DRY FILM MICROENCAPSULATED ADHESIVE COMPOUND APPLED TO THE THREADS 1. SCOPE This specification covers
2、 the performance of ISO Metric male threaded fasteners with dry film microencapsulated adhesive compound applied to the thread. NOTE: Fasteners with microencapsulated adhesive compound applied to the thread are not recommended for re-use after initial assembly. Chemical residues from subsequent wash
3、 procedures may adversely affect the curing performance of the compound, and care should be taken in the selection of any media employed. NOTE: These materials may be specified on fasteners that have multiple stage finishing processes. In some cases it may be advantageous to apply the adhesive mater
4、ial prior to the torque control lubricant. It is recommended that the processing route be agreed between the fastener maker, surface finisher and adhesive applicator to meet the Ford requirements. 1.1 REFERENCES ISO 4032 - Hexagon nuts, style 1 - Product grades A & B. WSE-M97B44-B - Coolant, Extende
5、d life - Concentrate for systems containing cast and wrought aluminum WSE-M2C903-A2 - Oil, Engine - ILSAC GF-1, SAE 10W-30 WSS-M2C938-A - Fluid, Automatic Transmission 2. MICROENCAPSULATED ADHESIVE MATERIAL The microencapsulated adhesive material must be as specified in WSS-M11P45-A1. 2.1 APPROVED S
6、OURCE LIST Parts PPAPd six (6) months and later after release date of this document shall use the approved sources listed below. OMNITECHNIK - OMNITECHNIK PRECOTE 80 PINK LOCTITE LTD. - LOCTITE 2045 - RED 3M CO. - SCOTCHGRIP 2353 - BLUE ND INDUSTRIES MICROSPHERES 593SG - GREEN 3. MICROENCAPSULATED A
7、DHESIVE DIMENSIONS AND POSITION ON THREAD Fasteners shall have a minimum of three full threads coated with the adhesive compound. The angle covered by the adhesive compound shall be 360. The first two full threads at the end of the fastener shall be free from any compound. No compound shall be permi
8、tted on the thread runout, on the underhead bearing face or on the plain shank of fasteners. The dimensions and position of the adhesive compound shall be as specified on the Ford drawing. 4. ROUTINE QUALITY CONTROL TEST Fasteners with the microencapsulated adhesive applied, taken from a production
9、batch, must be screwed into unplated, clean steel test nuts (to ISO 4032 with a 6H tolerance) until all the test nut threads are in contact with the adhesive coated threads or the adhesive coated threads are all in contact with the test nut threads. No clamp force shall be induced in either case. Th
10、e assembly must then be cured for 24 hours at 20oC. When a torque is then immediately applied to the fastener the adhesion break torque must meet the requirements specified in Table 1 appropriate to the size of fastener being tested. NOTE: A new nut must be used for each test. WORLDWIDE FASTENER STA
11、NDARD WX200 2014 06 30 Printed copies are uncontrolled Copyright 2013, Ford Global Technologies, LLC Page 2 of 4 Table 1 Adhesion Break Torques Nominal Size of Thread Minimum Adhesion Break Torque Nm Maximum Adhesion Break Torque Nm M5 1.5 5 M6 2 8 M8 4 24 M10 10 44 M12 15 80 M14 20 130 M16 30 160 M
12、18 30 175 5. INITIAL APPROVAL OF ADHESIVE COMPOUND AND NEW SUPPLIERS 5.1 PREPARATION OF TEST ASSEMBLIES Fasteners coated with the adhesive compound, taken from production batches, must be screwed into a container capable of being pressurized to 4 bar minimum. The female thread in the container shall
13、 be unplated, clean and dry steel and must have a 6H tolerance. When assembled in the container 3-4 adhesive coated threads shall be in contact with the female thread described above. NOTE: This is for initial validation only. No clamping force shall be induced in the fastener and the maximum speed
14、of assembly must not exceed 30 r.p.m. The assembly must then be left to cure for 24 hours at 20oC. NOTE: Test assemblies must be subjected to the test conditions immediately after completion of the 24 hour curing time. 5.2 TEST METHODS Using screws M10 x 55 with a surface finish in accordance with S
15、437 (WX 100) that have adhesive compound applied to the thread as specified in Clause 3 prepare test assemblies as specified in Clause 5.1. Fill these test assemblies with fluid as specified in Clauses 5.2.1, 5.2.2, 5.2.3, and 5.2.4 respectively and add a fluorescent dyestuff. Subject test assemblie
16、s to test conditions specified in Clauses 5.2.1, 5.2.2, 5.2.3, 5.2.4, 5.2.5, and 5.2.6. There must be no evidence of leakage under ultra-violet light. After completion of each of these tests the fastener must meet the requirements for adhesion break resistance specified in Table 1 whilst the assembl
17、y is at heat but with pressure released. 5.2.1 WATER/ANTIFREEZE RESISTANCE Antifreeze to WSE-M97B44-B diluted to 40% with water. The test period shall be 5 hours at 120 +/- 2oC with the test assembly pressurized to 2 bar. 5.2.2 OIL RESISTANCE Oil to WSE-M2C903-A2 (SAE 10W30) for 5 hours at 160 +/- 2
18、 oC with the test assembly pressurized to 4 bar. WORLDWIDE FASTENER STANDARD WX200 2014 06 30 Printed copies are uncontrolled Copyright 2013, Ford Global Technologies, LLC Page 3 of 4 5.2.3 FUEL RESISTANCE ASTM Fuel C + 15% methanol for 5 hours at 70 +/- 2 oC with the test assembly pressurized to 4
19、bar. 5.2.4 AUTOMATIC TRANSMISSION FLUID RESISTANCE Automatic transmission fluid to WSS-M2C938-A for 5 hours at 150 +/- 5 oC with the test assembly pressurized to 4 bar. 5.2.5 HEAT RESISTANCE Condition test assemblies for 5 hours at 120 oC +/- 2 oC then subject them to Clauses 5.2.1, 5.2.2, 5.2.3, an
20、d 5.2.4 when the test assemblies have returned to 20 oC. 5.2.6 COLD RESISTANCE Condition test assemblies for 5 hours at -30 oC +/- 2 oC then subject them to Clauses 5.2.1, 5.2.2, 5.2.3, and 5.2.4 when the test assemblies have returned to 20oC. 5.3 TEST EQUIPMENT Test Equipment must be capable of mai
21、ntaining the test pressures to +/- 3% for the duration of testing specified. 6. STORAGE LIFE Parts supplied shall still meet the requirements of this specification 6 months after receipt by Ford when stored at 5oto 28 oC with no direct heat or sunlight. 7. SUMMARY OF LATEST REVISIONS 2014 06 30 Sect
22、ion 2.1 Added colors and additional Approved Source Section 4. Added text for clarification 2013 02 28 Added Section 2.1 approved source list Added 2 full threads rule to Section 3 2010 07 20 Revised text for clarification in Section 3 2008 06 01 Added Record of Revisions. Replaced automatic transmi
23、ssion fluid, WSS-M2C202-B with global fluid specification, WSS-M2C938-A in Sections 1.1 and 5.2.4. Replaced test screw S309 finish with S437 finish in Section 5.2, and revised Section 1. WORLDWIDE FASTENER STANDARD WX200 2014 06 30 Printed copies are uncontrolled Copyright 2013, Ford Global Technologies, LLC Page 4 of 4
