1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 24 N-STATUS No replacement named C. Mracna, NA 2006 08 17 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.13, 3.14 & 4 1993 03 01 Released C10089123 B. Hennessey Printed copies are uncontrolled Copyright 2010, Ford Global Technologies,
2、LLC Page 1 of 5 DRIVE BELT, TOOTHED, HYDROGENATED NITRILE WSD-M96D15-A3 RUBBER (HNBR, 80 IRHD, GLASS TENSION CORDS, EXTENDED LIFE, DOUBLE FACING FABRIC) DRIVE BELT, TOOTHED, HYDROGENATED NITRILE WSD-M96D15-A4 RUBBER (HNBR, 80 IRHD, GLASS TENSION CORDS, EXTENDED LIFE, DOUBLE FACING FABRIC HYDROLYSIS
3、RESISTANT) NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by these specifications is a toothed drive belt based on 80 IRHD Hydrogenated Nitrile rubber (HNBR) with a double layer of polyamide facing fabric and glass fiber tension cords. The belt is suitable for use where average service
4、temperatures up to 125 C and peak service temperatures up to 140 C are experienced. The belt is oil and water resistant and remains flexible down to -40 C. The glass tension cords of -A4 belts are modified to improve hydrolysis resistance after prolonged water exposure. 2. APPLICATION These specific
5、ations were originally released for material used as toothed belts used to drive components such as camshaft, injector pump and/or auxiliary engine parts. These should be used in place of WSD-M96D15-A2 where greater tooth stiffness is required and, for -A4, applications where exposure to water is po
6、ssible. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 BELT CONSTRUCTION The belt shall consist of a Hydrogenated Nitrile rubber (HNBR) compound
7、 molded to the required tooth profile, covered on the contact face by a double layer of woven polyamide 6 or 66 fabric. There shall be no more than one join in the fabric except on belts with lengths greater than 9250 mm when two joins are permissible. The belt shall be reinforced by multifilament g
8、lass fiber tensioning cords in S and Z twist pairs. The pairs of cords shall be evenly spaced across the width of the belt. The cords shall be covered by a layer by a rubber the same as that used for the teeth. There shall be no ends or loops of tensioning cords protruding from the cut sides of the
9、belt. ENGINEERING MATERIAL SPECIFICATIONWSD-M96D15-A3/A4Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 3.5 MATERIAL TESTING - RUBBER The following tests shall be performed on finished belts and/or test specimens cut from them. The test specimens shall be di
10、e-cut from finished parts and buffed or slit to the required thickness where necessary. When not feasible, specimens cut from molded test slabs manufactured from the same material with an equivalent state of cure shall be used. The test sheets shall have the following dimensions: 150 x 150 mm, min x
11、 2.0 +/- 0.2 mm 3.6 ORIGINAL PROPERTIES 3.6.1 Hardness, International 71 - 81 IRHD (ISO 48) 3.6.2 Tensile Strength, min 18.0 MPa (ISO 37, Die C) 3.6.3 Elongation at Break, min 300% (Test Method according to para 3.6.3) 3.6.4 Modulus at 100% Elongation, min 3.5 to 5.5 MPa (Test Method according to pa
12、ra 3.6.3) 3.6.5 Brittleness Point, max -40 C (ISO 812, Type B specimen) 3.6.6 Compression Set, %, max 60% (ISO 815 Method B except 25% compression, plied-up specimens, 70 h at 125 C +/- 2 C) 3.7 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 1000 h at 140 +/- 2C) 3.7.1 Hardness Change, max +20 3.7.2
13、Tensile Strength Change, max -30% 3.7.3 Elongation at Break Change, max -80% 3.8 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 1000 h at 130 +/- 2C) 3.8.1 Hardness Change, max +15 3.8.2 Tensile Strength Change, max -30% 3.8.3 Elongation at Break Change, max -70% ENGINEERING MATERIAL SPECIFICATIONWSD
14、M96D15-A3/A4Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.9 IMMERSION IN OIL No.1 (ISO 1817, 168 h at 140 +/- 2 C) 3.9.1 Hardness Change -7 to +7 IRHD 3.9.2 Tensile Strength Change, max -20% max 3.9.3 Elongation at Break Change, max -25% max 3.9.4 Volum
15、e Change, max -15 to +5% 3.10 TENSION CORDS Glass fiber, multifilament spun with S twist and Z twist alternated. 3.11 FACING FABRIC Two layers of woven polyamide spun 6 or 66 fabric bonded together, the outer fabric being of heavier construction. The facing fabric construction shall be such that the
16、 requirement of this Material Specification and any Engineering Component specification relating to the toothed belt are met. 3.12 FINISHED PART 3.12.1 Hardness, International (ISO 48, Micro Method) Tooth 71 - 81 Back 71 - 81 3.12.2 Breaking Load Test Method: Tests to be conducted on complete belts
17、by pulling at 25 mm/minute between two 144 mm cylinders mounted with teeth facing outwards. One of the cylinders shall turn freely to equalize stress in the belt. The belt shall be 20 +/- 0.5 mm wide unless otherwise stated on the Engineering Drawing. Original, min A3 22 kN/20 mm A4 20 kN/20 mmHeat
18、Aged, min 20 kN/20 mm (Test Method per para 3.7) Heat Aged, min 20 kN/20 mm (Test Method per para 3.8) After Immersion in Oil No. 1, min 20 kN/20 mm (Test Method per para 3.9) After Immersion in 5% A3 -40% max Sodium Chloride Solution, min (168 h at 60 +/- 2 C) A4 -25% max ENGINEERING MATERIAL SPECI
19、FICATIONWSD-M96D15-A3/A4Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 3.12.3 Face Fabric Adhesion to Rubber Test Method: The face fabric(s) shall be separated from the rubber at 50 mm/minute on a tensile testing machine giving a continuous autographic load
20、 record. From the load record for each tooth stripped of its fabric, calculate the max peak force and the minimum valley force. Determine the mean peak and valley forces for at least 6 consecutive teeth. In some cases it may be found that the fabric breaks instead of peeling from the rubber. This sh
21、all be noted in the results and be deemed acceptable providing the value at which breakage occurs exceeds the specified Valley requirement. Original, min Peak: 100 N/cm Valley: 20 N/cm Heat Aged, min Peak: 60 N/cm (Test Method per 3.7) Valley: 15 N/cm Heat Aged, min Peak: 45 N/cm (Test Method per 3.
22、8) Valley: 12 N/cm After Immersion in Peak: 80 N/cm Oil No.1, min (Test Method per 3.9) Valley: 15 N/cm 3.12.4 Fabric Adhesion, Outer Layer from Inner Layer Test Method: The outer face fabric layer shall be separated from the inner layer by the method described in para 3.12.3. Original, min Peak: 40
23、 N/cm Valley: 12 N/cm Heat Aged, min Peak: 18 N/cm (Test Method per Valley: 10 N/cm para 3.7) Heat Aged, min Peak: 30 N/cm (Test Method per Valley: 10 N/cm para 3.8) After Immersion in Peak: 40 N/cm Oil No.1, min Valley: 12 N/cm (Test Method per para 3.9) 3.12.5 Heat Aged No Cracks (Test Method per
24、para 3.7) Test Method: After aging the belt shall be bent around a 25 mm diameter mandrel, the teeth facing inwards and outwards respectively separate samples required. ENGINEERING MATERIAL SPECIFICATIONWSD-M96D15-A3/A4Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Pag
25、e 5 of 5 3.12.6 Ozone Resistance, max Rating 0 (FLTM BP 101-01, belt to be bent around a 50 mm diameter mandrel 3.12.7 Low Temperature Flexibility (168 h at -40 +/-2 C) Test Method: After conditioning, the belt shall be bent within 1 s around a temperature conditioned 25 mm diameter mandrel. Separat
26、e samples of belt shall be tested with teeth facing inwards and outwards respectively. The belts shall be examined at 2X magnification. Original No cracks Heat Aged per para 3.7 No cracks Heat Aged per para 3.8 No cracks 3.12.8 Oil Resistance No splitting (Test Method per para 3.9) cracking or delam
27、ination Test Method: After conditioning, separate samples of belt shall be bent around a 25 mm diameter mandrel with the teeth facing inwards and outwards respectively. 3.12.9 Tooth Shear Resistance (FLTM BP 111-01, Procedure A or B) Original, min 0.9 kN/cm width Heat Aged, min 0.9 kN/cm width (Test
28、 Method per para 3.7) Heat Aged, min 0.8 kN/cm width (Test Method per para 3.8) After Immersion in Oil No.1, min 0.8 kN/cm width (Test Method per para 3.9, belt to be wiped dry with cloth before fixing to jig) 3.12.10 Cure State of Rubber-Impregnated Facing 0.2 Fabric, CN/CO Peak Area Ratio, max (FLTM BP 111-03)
