1、 FORD LABORATORY TEST METHOD BA 117-01 Date Action Revisions Rev. 0 2014 12 01 Released B. Haggart, NA Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Page 1 of 3 DENTING TEST FOR SCUFF PLATES WITH METAL APPLIQUES Application This procedure is used to determine the effe
2、cts of point load impact on scuff plates with metal appliqus Apparatus Required Steel Ball Steel ball bearing ball approximately 150.8 grams with a diameter of 33 +/- 1 mm. Tube Apparatus with Ball Release Mechanism The apparatus consists of a rigid tube with an inner diameter large enough to let th
3、e ball travel freely. The ball release mechanism can be a flat plate or a cylinder that holds the ball in the tube 10 cm (4 inches) above the test surface. The mechanism is then removed, releasing the ball. A notch should be cut into the lower end to let air escape during the ball drop and light in
4、for positioning. Edges should be free of burs. (See Figure 1) Millimeter scale with at least 0.5 increments Magnifying glass, 6 to 10 X 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 % relative
5、 humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facili
6、ties. FORD LABORATORY TEST METHOD BA 117-01 Copyright 2014, Ford Global Technologies, LLC Page 2 of 3 Procedure 1. Test sample should be in the vehicle trim piece which is held securely enough in fixture to simulate vehicle support and interface (i.e. any unsupported/supported areas must be emulated
7、) with the impact surface horizontal so the area to be tested is normal to the direction of impact. 2. Position tube apparatus directly over the selected impact location so the released steel ball drops vertically on the test sample. 3. Insert the ball release into the tube and place the steel ball
8、on to the ball release. The ball release should hold the bottom of the steel ball 10 +/- 0.1 cm above the test sample. 4. Remove the ball release and allow the ball to impact the test sample. Evaluation 1. Perform a visual evaluation for cracking, delamination, surface marring, and denting. Cracking
9、 Any cracking of the top coat, middle layer, substrate, or edges Delamination Any blistering or peeling between any layers on surface or edges Surface Marring is caused by direct contact with the ball. It will be circular and have a defined edge that can be measured. Denting is the bending of the me
10、tal sheet around the outside of the surface impression. (See Figure 2) 2. If a surface marring exists, lay the scale next to the surface marring and measure using the magnifying glass. Measurements should be recorded to the nearest 0.5 mm. Figure 1 Steel Ball Ball Release Tube Test Sample 10 +/- 0.1
11、 cm Slots or holes for Ball Release FORD LABORATORY TEST METHOD BA 117-01 Copyright 2014, Ford Global Technologies, LLC Page 3 of 3 Figure 2 Example of acceptable sample with: - Surface marring less than 1.0mm - No denting Example of NOT acceptable sample with: - Surface marring less than 1.0mm - With denting
