1、 FORD LABORATORY TEST METHOD BU 157-01 Date Action Revisions Rev. 00 2017 10 27 Released P. Konopka,R.Surowiec, NA Controlled document at www.MATS Copyright 2017, Ford Global Technologies, LLC Page 1 of 2 TORQUE STRENGTH OF MIRROR BUTTON ADHESION Application This procedure describes a method of dete
2、rmining the breakaway torque required to detach a mirror button. Apparatus and Materials Required Torque wrench, 3/8” drive up to 100 ft-lbs, 135 Nm with peak load capture. A ” drive torque wrench with a longer arm for improved leverage can also be used. Attachment block, Custom made block with a 3/
3、8” (or ”) square drive that is centered over an opening that fits over the mirror button. See Figures #1 and #2. Fixture to support and hold small windshield sections (not necessary for full windshields) Chemicals, materials, parts, and equipment referenced in this document must be used and handled
4、properly conforming to local regulatory requirements. Procedure 1. Test samples need to be normalized at standard laboratory conditions of 23 +/- 2 C and 50 +/- 5 % relative humidity for 2 hours. 2. Secure small test sections in the fixture 3. Attach torque wrench with attachment block over the mirr
5、or button 4. Reset peak load torque to zero 5. Torque the mirror button at a constant rate until it breaks away from the windshield. Since the breakaway failure will be sudden, be conscience of where arms and hands may travel. Evaluation 6. Report the peak or max torque in Nm FORD LABORATORY TEST METHOD BU 157-01 Copyright 2017, Ford Global Technologies, LLC Page 2 of 2 General Supplemental Information for Reference only Figure #1 Torque attachment Figure #2 After being torque Figure #3 Determining the breakaway torque on a full windshield Figure #4
