1、 FORD LABORATORY TEST METHOD BO 040-01 Date Action Revisions Rev. 0 2016 07 08 Released L. Sinclair, NA Controlled document at www.MATS Copyright 2016, Ford Global Technologies, LLC Page 1 of 3 SHORT AND LONG TERM ENVIRONMENTAL TESTING Application This procedure is used to determine the dimensional
2、stability, function and visual/tactile performance of a component after undergoing short term cyclic and/or long term heat exposure testing. Apparatus and Materials Required Environmental Cabinet Capable of maintaining controlled temperature and humidity conditions to +/- 1 C and +/- 2% relative hum
3、idity. Oven As described in ASTM D 573 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 facilities. Sample Preparation All parts shall be fully trimmed including all comp
4、onents packaged in the environment (eg. speakers, hardware, wiring, etc.) and assembled onto actual or representative production support foundations. This includes not only all attaching points, but also any boundary conditions that may restrict movement, unless otherwise specified by the responsibl
5、e PD Engineer. The retention methods, attachments, and supporting garnish moldings (if any), shall be the same as proposed for production. Measurement Location 1. Every twenty centimeters and at the points of greatest movement between the twenty centimeter marks along the parts outside edges and int
6、ernal openings or as defined by PD Engineering. Some parts may have specific measurement locations required by PD Engineering, which will override the 20 cm required. Part specific measurement locations to be signed off by PD Engineering prior to test. 2. The “significant characteristics locations“
7、specified on the engineering drawing. 3. Unique requirements will be noted in the applicable performance specification. Measurement Technique The movement at each measurement point shall be recorded in two directions: (1) in the x/y plane from the observers view, and (2) in the z-dimension direction
8、 into or out of the x/y plane from the observers view. The observers view shall remain consistent always viewing from the front side of the part. Procedure A: Short Term Heat, Humidity and Cold Cycle 1. Visually evaluate the part before the test. Note any defects on the component prior to testing. 2
9、. Measure the part and record the data at all specified locations at room temperature before cycling on the production support foundation or test fixture. Any visual defects/imperfections must be noted in the test report, and signed off by PD Engineering for compliance. FORD LABORATORY TEST METHOD B
10、O 040-01 Copyright 2016, Ford Global Technologies, LLC Page 2of 3 3. Use test chambers with automated programmable test cycles for the listed test conditions below. Note that stages do not include ramp times to transition from level to level. Each specimen can have different size, geometry, density,
11、 etc. which impacts ramp times; therefore, each transition period will vary in length of time. Total test time should exceed 38 h due to time required to transition from level to level. 4. Program the chamber as follows: 5 h at -30 +/- 2 C 30 min at 23 +/- 2 C and 50% R.H. 5 h at XX*+/- 2 C 30 min a
12、t 23 +/- 2 C and 50% R.H. 2 h at 50 +/- 2 C and 95 +/- 5% R.H. 30 min at 23 +/- 2 C and 50% R.H. 5 h at -30 +/- 2 C 30 in at 23 +/- 2 C and 50% R.H. 5 h at XX* +/- 2 C *The temperature to be used shall be identified by vehicle location in the material/performance specification. See Table 1 for vehic
13、le location and test temperature examples. Table 1 Vehicle Location Examples of components Test Temperature Horizontal or vertical parts AT OR ABOVE THE BELT-LINE -pillars; upper quarter panels; hard instrument panels, and window garnish moldings 100+/- 2 C Horizontal or vertical parts BELOW THE BEL
14、T-LINE door panels, lower quarter trim panels, floor and overhead consoles, and glove box doors, seat back carpets 90 +/- 2 C Non Sun Loaded Scuff plates, and other non-sun loaded floor level parts, floor carpets 80 +/- 2 C 5. Evaluate per evaluation method below. Procedure B: Long Term Heat Exposur
15、e/Sun Load 1. Visually evaluate the part before the test. Note any defects on the component prior to testing. 2. Measure the part and record the data at all specified locations at room temperature before testing on the production support foundation or test fixture. Any visual defects/imperfections m
16、ust be noted in the test report, and signed off by PD Engineering for compliance. 3. Program the chamber for 7 days using the appropriate temperature as identified in the material/performance specifications. See Table 1 for examples. 4. Evaluate per evaluation method below. Evaluation The trimmed as
17、semblies shall remain relatively unaffected by the exposure cycles during and after the tests as demonstrated by: FORD LABORATORY TEST METHOD BO 040-01 Copyright 2016, Ford Global Technologies, LLC Page 3of 3 1. Visual Evaluationevaluate per ISO 105-A02 AATCC Procedure 1 also no excessive tackiness,
18、 loss in surface-grain, or surface-color, yellowing, wrinkling, distortion, blistering, delamination, blushing, hazing, milking, staining, waviness, or other objectionable visual appearance. 2. Functional Evaluation No warping or distortion that will interfere with normal functional operations. 3. D
19、imensional Evaluation - no movement exceeding what is required on the Engineering drawing from the original installed position during or after the test. Reporting 1. The test report shall include Procedure Test Condition Visual rating Functional rating (pass/fail) Dimensional measurements (before an
20、d after) 2. Example of the test result designation Procedure- (B) Long Term Heat Exposure Test Condition - Non sunload (80 C) Visual Evaluation AATCC Rating- 4-5 , no signs of visual degradation Functional Rating - Pass Dimensional measurements as required per the drawing / component or specification
