1、FORD LABORATORY TEST METHOD BN 102-05 2001 10 31 PLIABILITY OF SEAT BELT WEBBING Revised Editorial - no technical change A. Cockman Application This procedure is used to determine the pliability of seat belt webbing. Apparatus Required Pliability Test Stand (for filling specimens) For detailed plans
2、 on this apparatus, contact Interior Materials Engineering, Body Engineering, Dearborn, MI. Dial Indicator Model D81 S, low friction full jewelled bearing. Federal Products Corporation, Providence, Rhode Island. The following modifications must be made on the dial indicator: Remove back spring. Remo
3、ve hair spring and hair spring pin on takeup gear assembly. Remove lower point and substitute the contact foot. Remove rack stopscrew and replace with rod indicator top. Adjustable Air Damping Dash Pot Part No. 50046-1, obtainable from Airport Corporation, 27 Lois Street, Norwalk, CT 06851 Specimen
4、Fixture Weight One 30 g weight. Timing Device Timing in tenths of a second - Precision Scientific Catalogue 69230 or equivalent. Wooden Dowels Dowel - 22 x 150 mm Dowel - 13 x 150 mm I Date I Action I Revisions I Copynght O 2001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BN 102-05 Pl
5、iability Test Stand (for warp specimens) As indicated in figure 2 Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 OC and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under th
6、e same conditions unless otherwise specified. Test Procedure (Fill Direction) 1. 2. 3. 4. 5. 6. 7. 8. Check the zero of the dial gage on the Pliability Test Stand as follows: Insert a 25.4 mm high block on the test stand. Lower the foot assembly until it comes into contact with the block. Then adjus
7、t the dial indicator to read zero by adjusting its height above the test stand and/or rotating the dial face. Six specimens, 76 mm x the width of the webbing are required for the test, three for testing the webbing with one side (side A) toward the operator and three for testing the webbing with the
8、 opposite side (side B) toward the operator. Take a specimen and with side A toward the operator, wrap the 76 mm length around a 22 mm dowel until both ends meet. Repeat step no. 3 with side B toward the operator Take the above specimen and with side A toward the operator, wrap the width around a 13
9、 mm dowel until both edges meet. Repeat step no. 5 with side B toward the operator. Insert the webbing side A toward the operator into the specimen fixture (Figure 1) without any unnecessary flexing. Two suitable ways are as follows: A. From an open end, locate the webbing in the slots, one slot at
10、a time, pushing the webbing across the width of the holder. B. From an open end, locate the entire length of the webbing in the lower slots. Lift the webbing with both hands and locate in both upper slots simultaneously. Mount the specimen fixture on the pliability test stand, and add weight as indi
11、cated in the applicable specification. Page 2 of 5 Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BN 102-05 9. 1 o. 11. 12. 13. 14. 1. 2. 3. 4. 5. 6. 7. Raise the contact foot and release at a speed of 3.5 seconds per 25 mm of travel. As the foot comes in contact with the e
12、dge of the webbing, start the timer. After 60 s, observe the reading on the dial gauge and record. Repeat steps no. 3 through 11 for two additional specimens (side A toward the operator. Repeat steps no. 3 through 11 for the remaining three specimens (side B toward the operator. Calculate and report
13、 the average pliability of all six test results. Test Procedure (Warp Direction) Three specimens 360 mm x the width of the webbing are required for the test. Insert one end of the specimen (side A up) under the top plate of the warp pliability test stand (Figure 2). Use spacers below the top plate a
14、s required to permit free sliding of the webbing. Then tighten the wingnuts to secure the top plate. Making sure the specimen does not buckle, push it completely under the plate until the end exits and continue to push until the end “bends“ and comes in contact with the metric scale on the base plat
15、e. Record the measurement, in mm, where the end of the webbing first contacts the scale. Repeat steps 2 - 4 with side A down. Repeat steps 2 - 5 with the remaining two specimens. Calculate and report the warp test results as the average pliability of the six test results. Chemicals, materials, parts
16、, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. Page 3 of 5 Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BN 102-05 FIGURE I WEBB IN i3 END VIEW OF SPECIMEN
17、FIXTURE Page 4 of 5 Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BN 102-05 FIGURE 2 ZERO END OF METRIC SCALE 2 Luz 4z WINGNUTS USED TO TIGHTEN TOP PLATE o0 SPACERS TO ALLOW LE FREE SLIDING OF WEBBING I 3 in l. MATERIAL: 6.4 MM ALUMINUM PLATE BOLTS THREADED INTO BOTOM PLATE ONLY SIZE BOLTS, NUTS AND HOLES AS REQUIRES TO ENSURE ROBUSTNESS OF THE TEST STAND ALL DIMENSIONS MM Page 5 of 5 Copynght02001, Ford Global Technologies, Inc
