1、FORD LABORATORY TEST METHOD BP 108-06 2001 0823 COMPRESSION SET OF COOLANT HOSES Revised Editorial - no technical change A. Cockman Application This method is used for establishing the compression set that could be expected to occur with engine coolant hoses under securing clamps. It seeks to reprod
2、uce the type of indentation caused by the clamps in the wall of the hose. An excessive compression set measured by this method would indicate a hose that could eventually allow leakage of coolant past the clamps in service. Apparatus Required Compression Fixture Refer to Figures 1 through 4 Dial Mic
3、rometer For use in measuring thicknesses according to ASTM D 3767, Method AI. The measuring foot shall be flat with a diameter of 2.5 +/- 0.1 mm and exert a load of 45 g throughout the measuring range. Feeler Gages or Gage Blocks For setting the specified compression under the indicators. Air-circul
4、ating Oven Conforming to ASTM E 145, Type IIA. 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 the same conditions u
5、nless otherwise specified. Procedure 1. Using a suitable die, stamp out a 13 +/- 0.5 mm diameter disc from the wall section of the hose (3 samples for each test). If the surface of the outer cover is irregular, it shall be lightly buffed around the test area until smooth. I I Date I Action I Revisio
6、ns Copynght O 2001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BP 108-06 2. Measure the thickness of each sample with the outer cover side down and calculate the required distance between the base plate and the bottom face of the indentor to give the specified compression value. 3. Ti
7、ghten the compression set fixture plates and, using feeler gages or gage blocks, set each indentor to give the specified compression. 4. Release the top compression plate and insert the hose samples under the preset indentors. Replace the top compression plate and tighten fully. 5. Age the compressi
8、on fixture in the oven for the specified time and temperature after which the fixture is removed and allowed to cool for 3 +/- 0.25 h. Fiemove each sample separately and measure the compressed thickness after 1 O +/- 0.5 minutes of its withdrawal from the fixture. Evaluation Calculate the percent co
9、mpression set according to the following: % Compression Set = A - C x 100 A-B Where: A = initial sample thickness B = compressed thickness before aging C = compressed thickness after aging after sample removal Chemicals, materials, parts, and equipment referenced in this document must be used and ha
10、ndled properly. Each party is responsible for determining proper use and handling in its facilities. Page 2 of 6 Copyright02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BP 108-06 COMPRESSION SET OF COOLANT HOSES Figure 1 I l. I 5. 6. 2. 3. 4. 7. Sectional View of Compression Set Fi
11、xture 1. Loading Screw 2. Pressure Plate 3. Pressure Spring: O.D. = 8 mm I .D. = 6 mm Length = 16.5 mm Compressed Length = 6.5 mm Compressed Force = 3.7 kg Number of Turns = 5.5 4. Base Plate 5. Adjusting Screw and Indenter 6. Lock Nut - M6 7. Test Sample 8. Material: Stainless Steel 9. All dimensio
12、ns in mm, +/- 0.25 Page 3 of 6 Copyright02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BP 108-06 COMPRESSION SET OF COOLANT HOSES Figure 2 10.3 Dia -, MI II Loading Screw All dimensions in mm - L Di a Page 4 of 6 Copyright02001, Ford Global Technologies, Inc FORD LABORATORY TEST ME
13、THOD BP 108-06 COMPRESSION SET OF COOLANT HOSES Figure 3 Adiustina Screw 1- 10.5 - M6 - 6 Places Dia Pressure Plate All dimensions in mm Page 5 of 6 Copyright02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BP 108-06 B 2 Places COMPRESSION SET OF COOLANT HOSES Figure 4 7 -11 210 I r + 30 4 I 90 - 1 -. Base Plate All dimensions in mm +-. i- 15 A Page 6 of 6 Copyright02001, Ford Global Technologies, Inc
