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, 3.12 & 4 1988 02 08 Released SM/ER 2301 TC B. Hennessey Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LL
2、C Page 1 of 4 DRIVE BELT, TOOTHED - POLYCHLOROPRENE RUBBER (CR) - WSD-M96D16-A PARA-ARAMID TENSION CORDS - SINGLE FACING FABRIC NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a toothed drive belt based on Polychloroprene (CR) rubber with a single layer of polyam
3、ide facing fabric and para-aramid tension cords. The belt is oil and water resistant and remains flexible down to -40 C. 2. APPLICATION This specification was released originally for material used as a toothed belt used in the mechanical anti-lock braking system. 3. REQUIREMENTS 3.0 STANDARD REQUIRE
4、MENTS 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 Polychloroprene (CR) rubber compound molded to the required tooth profile, covered on t
5、he contact face by a single layer of woven polyamide 6 or 66 fabric. There shall be no more than one join in the fabric. The belt shall be reinforced by multifilament para-aramid tensioning cords in S and Z twist pairs. The pairs of cords shall be evenly spaced across the width of the belt. The cord
6、s shall be covered by a layer of 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 belt. 3.5 MATERIAL TESTING - RUBBER The following tests shall be performed on finished belts and/or test specimens cut from them. The
7、test specimens shall be die-cut from the 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 specimens shall have the followin
8、g dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.6 ORIGINAL PROPERTIES 3.6.1 Hardness, International 70 - 85 (ASTM D 1415) 3.6.2 Hardness, Durometer A 75 - 85 (ASTM D 2240, instantaneous, plied-up specimens) ENGINEERING MATERIAL SPECIFICATIONWSD-M96D16-APrinted copies are uncontrolled Copyright 20
9、10, Ford Global Technologies, LLC Page 2 of 4 3.6.3 Tensile Strength, min 13 MPa (ASTM D 412, Die C) 3.6.4 Elongation at Break, min 300% (ASTM D 412, Die C) 3.6.5 Modulus at 100% Elongation 2.5 to 4.0 MPa (ASTM D 412, Die C) 3.6.6 Compression Set, max 80% (ASTM D 395, Method B, 22 h at 100 C) 3.6.7
10、Brittleness Point, max -30 C (ASTM D 2137, Method A) 3.6.8 Ozone Resistance, max Rating O (FLTM BP 101-1) 3.7 HEAT AGED (ASTM D 573, 1000 h at 80 +/- 2 C) Hardness Change, max +10 Tensile Strength Change, max -30% Elongation at Break Change, max -50% Modulus at 100% Elongation 4.0 to 5.5 MPa 3.8 HEA
11、T AGED (ASTM D 573, 70 h at 100 +/- 2 C) Hardness Change, max +10 Tensile Strength Change, max -15% Elongation at Break Change, max -40% Modulus at 100% Elongation 4.0 to 5.5 MPa 3.9 IMMERSION IN ASTM OIL No.1 (ASTM D 471, 70 h at 100 +/- 2 C) Hardness Change +/- 10 Tensile Strength Change, max -30%
12、 Elongation at Break Change, max -30% Modulus at 100% Elongation 2.5 to 4.0 MPa Volume Change, max +20% ENGINEERING MATERIAL SPECIFICATIONWSD-M96D16-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 4 3.10 TENSION CORDS Para-aramid fiber 1670 decitex X1X3 with
13、280 twists/meter initial twist and 280 twists/meter cable twist. Cords to be alternately S and Z twist and wound 20 +/- 1 cords per 25 mm width of belt. 3.11 FACING FABRIC A single layer of woven polyamide 6 or 66 fabric. The facing fabric construction shall be such that the requirements of this Mat
14、erial Specification and any Engineering Component Specification requirements relating to the toothed belt are met. 3.12 FINISHED PART 3.12.1 Rubber Hardness, International (ASTM D 1415, Micro Method) Tooth 67 - 77 Back 67 - 77 3.12.2 Breaking Load Test Method: Tests to be conducted on complete belts
15、 by pulling at 25 mm/min between two 25 mm cylinders mounted with teeth facing outwards. One of the cylinders shall turn freely to equalize stress in the belt. Original, min 10 kN/20 mm width Heat Aged, min 9 kN/20 mm width (Test Method per 3.7) After Immersion in ASTM Oil No.1, min 9 kN/20 mm width
16、 (Test Method per 3.9) After Immersion in 5% Sodium Chloride Solution, min 9 kN/20 mm width (168 h at 60 +/- 2 C) 3.12.3 Face Fabric Adhesion to Rubber Test Method: The face fabric(s) shall be separated from the rubber at 50 mm/min on a tensile machine giving a continuous autographic load record. Th
17、e peak loads recorded for the land area between the teeth only shall be considered. Fabric shall be stripped from a minimum of 6 teeth. Original, min 25 N/cm width Heat Aged, min 15 N/cm width (Test Method per 3.7) After Immersion in ASTM Oil No.1, min 10 N/cm width (Test Method per 3.9) ENGINEERING
18、 MATERIAL SPECIFICATIONWSD-M96D16-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 4 3.12.4 Heat Aged No Cracks (Test Method per 3.7) Test Method: After ageing the belt shall be bent around a 25 mm diameter mandrel, the teeth facing inwards and outwards respec
19、tively (separate samples required). 3.12.5 Ozone Resistance, max Rating 0 (FLTM BP 101-01, belt to be bent around a 50 mm dia.mandrel with the teeth facing inwards) 3.12.6 Low Temperature Flexibility No cracks (168 h at -40 +/- 2 C) Test Method: After conditioning, the belt shall be bent around a te
20、mperature conditioned 25 mm diameter mandrel. Separate samples of belt shall be tested with the teeth facing inwards and outwards respectively. 3.12.7 Oil Resistance No splitting, (Test Method per 3.9) cracking or delamination Test Method: After conditioning, separate samples of belt shall be bent a
21、round a 25 mm diameter mandrel with the teeth facing inwards and outwards respectively. 3.12.8 Tooth Shear Resistance (FLTM BP 111-01, Toothed pulley wheel for belt engagement to be equivalent to that shown on 86TT 3K167-A or as shown on the Engineering Drawing) Original, min 0.6 kN/cm width Heat Aged, min 0.7 kN/cm width (Test Method per 3.7) After Immersion in ASTM Oil No.1, min 0.6 kN/cm width (168 h at 80 +/- 2 C, belt to be wiped dry with a cloth before fixing to jig).
