FORD FLTM BV 132-1-2000 DETERMINATION OF FERROMAGNETIC RESPONSIVENESS OF ADHESIVES SEALERS.pdf

1、 FORD LABORATORY TEST METHOD BV 132-01 Date Action Revisions 2000 08 22 Revised Editorial no technical change A. Cockman 2000 05 18 Activated Y. Bankowski Printed copies are uncontrolled Page 1 of 6 Copyright 2000, Ford Global Technologies, Inc. DETERMINATION OF FERROMAGNETIC RESPONSIVENESS OF ADHES

2、IVES/SEALERS Application This procedure is used to determine the ferromagnetic responsiveness of an adhesive/sealer for the purposes of on -line mix ratio verification. The level of response is based on the amount of a taggant incorporated into an adhesive/sealer. The test is performed using a stand

3、ard eddy current non -destructive test instrument and coil under a set of standard conditions. Apparatus Required* Eddy Current Non-Destructive Test Instrument A non - destructive alloy and hardness -testing instrument that utilizes eddy current principles (Verimet N7700, or its equivalent). Eddy Co

4、il An eddy coil matched for use with the Eddy Current Non - Destructive Test Instrument. 40020M300 Transducer Transducer Cable The Transducer Cable is used to attach the Eddy Coil to the Non - Destructive Test Instrument. This cable should be 3 feet in length. Taggant Master Standards Two taggant ma

5、ster standards are used to verify performance and calibration of t he Eddy Coil and Non - Destructive Test Instrument. The taggant master standards required are 95% and 67%. *Source: K.J. Law Engineers, Inc. 42300 W. Nine Mile Road Novi, MI 48375 - 4103 Telephone: (248) 347 - 3300 Toll Free: (800) 5

6、21 - 5245 Fax: (24 8) 347 - 3345 Web Site: FORD LABORATORY TEST METHOD BV 132-01 Page 2 of 6 Copyright 2000, Ford Global Technologies, Inc. Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/ - 2 C and 50 +/ - 5% re

7、lative humidity for a minimum of 24 hours prior to testing and tested under the same conditions, unless otherwise specified. All samples to be tested need to be contained in mixing nozzles from which the internal mix element has been removed. The outer diameter should be 16.764 +/ - 0.254 mm; the in

8、ner diameter should be 12.624 +/ - 0.038 mm; the nozzle should be at least 115 mm long. Fill the mix nozzle with adhesive/sealant per Test Specimen Preparation. Test Specimen Preparation Apparatus Required Sample Holders Mixing Nozzles without the internal mix elem ent will be used as sample holders

9、 for prepared standards and test specimens. The outer diameter should be 16.764 +/ - 0.254 mm (0.660 +/ - 0.010 in); the inner diameter should be 12.624 +/ - 0.038 mm (0.497 +/ - 0.0015 in). The mix nozzle will be cut to 115 mm, filled with material, and sealed for testing. Source: TAH Industries, I

10、nc., or other mixing nozzle supplier TAH Industries, Inc. 107 N Gold Drive Trenton, NJ 08691 Telephone: (609) 259 - 9222 Fax: (609) 259 - 0957 Web Site: Air-Assisted Caulking Gun, or Similar Device The caulking gun will be used to prepare standards and test specimens. Preparing Standards and Test S

11、pecimens Remove mixing element from mix nozzle and cut the mix nozzle so that the length is at least 115 m m. Using an air -assisted caulking gun or similar device, inject the sample into the mix nozzle. Ensure there are no voids or entrapped air. Seal the nozzle at both ends using masking tape or s

12、imilar. Note: When these test specimens are measured, they should be placed in the eddy current coil so that they are centered along the long axis (see Figure 1). FORD LABORATORY TEST METHOD BV 132-01 Page 3 of 6 Copyright 2000, Ford Global Technologies, Inc. Procedure 1. Settings for Operation of N

13、on-Destructive Test Instrument: (This step is to be performed initially, before any samples are tested) a. Connect the coil to the Non - Destructive Test Instrument via a transducer cable. b. Turn POWER on, and allow a 20 - minute warm - up period. c. Place the Master Standard in the eddy coil. Ensu

14、re that at least 25mm of the standard is protruding from eit her end of the coil (see Figure 1). Confirm the reading displayed on the Non - Destructive Test Instrument corresponds to the taggant level of the Master Standard. Note: Either Master Standard (95% or 67%) may be used. If you are measuring

15、 unmixed materia l, use the 95% Master Standard; if you are working with mixed material, the 67% Master Standard may be used. d. If necessary, adjust the readout display on the instrument to match the level of the Master Standard. Refer to the Appendix and Manufacturer s manual for specific instruct

16、ions on adjusting the readout displayed. e. The instrument is now ready to measure the ferromagnetic responsiveness of the prepared samples. f. Confirm the Master Standard reading before testing each new sample set. 2. Measuring Ferromagnetic Responsiveness of Test Specimens: a. Place the test speci

17、men in the eddy coil. Ensure that at least 25mm of the specimen is protruding from either end of the coil (see Figure 1). In the case of the K.J. Law Verimet N7700 Non - D estructive Test, the readout displayed corresponds to the percent taggant present in the material. b. Condition the test specime

18、ns to 35C for three days. Insert the test specimen (at 35C) into the coil as above. Record the data. The samples at bot h RT and 35C should have the same response, within +/ - 1. FORD LABORATORY TEST METHOD BV 132-01 Page 4 of 6 Copyright 2000, Ford Global Technologies, Inc. c. Additional testing ma

19、y be required after 90 days aging at a temperature specified by Materials Engineering. Figure 1 : Test specimen position within eddy coil for accu rate recording of the ferromagnetic responsiveness with the non - destructive test instrument. 3. Replacing or Altering a Coil or Cable on the Non-Destru

20、ctive Test Instrument: When a coil or instrument needs repair or replacement, both the coil and instrum ent should be returned to the Manufacturer for repair/replacement and recalibration. 4. Recalibration of the Non-Destructive Test Instrument: The instrument and coil should be returned to the Manu

21、facturer for recalibration and certification on an annual basis. Refer to the Manufacturers manual for specific instructions on recalibration and certification. 5. Report: a. Conditioning procedure for specimens prior to testing. b. Test conditions, including sample temperature and relative humidity

22、. Note that the test should be run at ambient temperature (23 F) and at 35 C. c. Average of taggant level readings which are read from the display panel. d. Number of specimens tested. Three to five specimens should be used for each sample tested. Literature Reference K.J. Law Engineers, Inc. Verime

23、t 7700 Eddy Current Instrument Operation Manual, Version 2.1, January 1998. FORD LABORATORY TEST METHOD BV 132-01 Page 5 of 6 Copyright 2000, Ford Global Technologies, Inc. APPENDIX : Operation of the Verimet N7700 Figure 2 : Verimet N7700 Settings for Operation of Verimet N7700 Non-Destructive Test

24、 Instrument: (This step is to be performed initially, before any samples are tested) 1. Connect the coil to the Verimet N7700 Non - Destructive Test Instrument via a transducer cable. 2. Turn POWER on, and allow a 20 - minute warm - up period. 3. Locate the Verimet N7700 Taggant System Certification

25、 document associated with the Verimet N7700 instrument being used. Verify instrument settings are correct. a. Verify that the proper serial number 40020M300 transducer (as listed on the Certificate ) is being used. b. In the SETUP menu, verify i. Sort #1 is being used ii. Frequency is 1K iii. Mode b

26、eing used is AMPLITUDE c. In the DIAGNOSE and MANUAL SETUP menus, and in the DRIVER/SENSE submenu, verify that the DRIVER and SENSE levels are set at the values listed in the certificate. d. In the DIAGNOSE and MANUAL SETUP menus, and in the GAINS/OFFSETS submenu, verify that the ZERO CROSS, AMP GAI

27、N, AMP OFFSET and PHASE OFFSET levels are set at the values listed in the certificate. FORD LABORATORY TEST METHOD BV 132-01 Page 6 of 6 Copyright 2000, Ford Global Technologies, Inc. 4. If any of t he parameters do not match those listed on the certificate, correct them. Refer to the K.J. Law Engin

28、eers, Inc. Verimet N7700 Eddy Current Inspection Instrument Operation Manual for specific instructions about navigating through the menu screen options an d changing the values of the parameters. Running the Verimet N7700 Non-Destructive Test Instrument: (This step is to be performed once the Verime

29、t N7700 has been set up and verified) 1. Turn POWER on, and allow a 20 - minute warm - up period. 2. Ensure the re is no extra metal near the eddy coil as this may interfere with operation of the instrument. If necessary, place the coil on a non - metallic surface. Note: metal supports underneath a

30、tabletop may cause magnetic interference. 3. Move the cursor to CYCLE and press ENTER 4. Place the 95% Master Standard in the coil. Observe the reading displayed on the Verimet N7700. The reading on the instrument represents the taggant level of the sample being tested. Thus, a reading of 95 represe

31、nts 95.0%, and a readi ng of 67.0 represents 67.0%. If the reading does not read 95+/ - 1, perform the following steps to correct the readout: a. Record the current reading of the 95% Master. Let this value by A1. b. Solve the following equation for A2: A2=95 - A1 c. Press ESC to return to the main

32、menu. d. Move the cursor to DIAGNOSE and press ENTER two times. e. Mover the cursor to GAINS/OFFSETS and press ENTER. f. Record the current value for AMP OFFSET. Let this value by A3. g. Solve the following for A4: h. A4=A3+A2 i. Move the cursor to AMP OFFSET and press ENTER. j. Change the value to the number calculated for A4. k. Press ESC four times to return to the main menu. l. Move the cursor to CYCLE and press ENTER. m. Verify that the reading on the 95% master now reads 95+/ - 1. 5. The instrument is now ready to test the tagged specimens.