1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards DOOR PANEL STIFFNESS & DENTABILITY TEST Do Not Use on New Programs. Being Replaced by GMW14284 EDS-T-3208 ISSUED DATE: 1990. 04. 09 REVISED DATE: 2008. 10. 15 VERSION: 4 (Superceded) DOOR PANEL STIFFNESS & DENTABILITY
2、 TEST EDS-T-3208PAGE: 1/4 ISSUED DATE: 1990. 04. 09 REVISED DATE: 2008. 10. 15 VERSION: 4 GM DAEWOO Auto & Technology Note: This standard may be applied only for current project (incl. T255 Program). It is Superceded for all future projects and replaced by GMW14284. 1. PURPOSE This standard aims at
3、specifying the procedures and specifications for evaluating oil canning Note 1)and dent resistance of the door outer panel. Note 1). Note 1)Oil Canning: Momentary drop of loads due to reversed surface curvature of the panel 2. SCOPE This standard applied to door outer panels of passenger cars and mu
4、lti-purpose vehicles. Particulars not specified here shall follow the direction in drawings. 3. SAMPLE 3.1. In the event of any intentional deviation from the requirements of this standard or engineering change, the supplier shall inform GMDAT of them. 3.2. Samples shall be composed of components an
5、d parts meeting material and dimensional requirements in drawings 3.3. Following consultation with the design engineer, however, they may be composed of parts for developmental use 3.4. Samples shall be the door in white furnished with parts constituting the door specified in drawings. 3.5. Samples
6、shall be coated with primer or to the higher stage and those with the deadener as the standard option shall be furnished with it. 3.6. Samples shall show no sign of flaws, deformation or scratch on the surface and be free from loads that may affect test. 4. TEST EQUIPMENT 4.1. Horizontal test bed. 4
7、.2. Displacement transducer - Min. 50mm 4.3. Load cell capable of measuring Min. 500 N 4.4. X-Y recorder DOOR PANEL STIFFNESS & DENTABILITY TEST EDS-T-3208PAGE: 2/4 ISSUED DATE: 1990. 04. 09 REVISED DATE: 2008. 10. 15 VERSION: 4 GM DAEWOO Auto & Technology 4.5. Panel loading device 4.6. Loading jig
8、: See “Fig 1”. Fig. 1 Loading jig 4.7. Door hinge and latching point fixture jig 5. TEST PROCEDURES 5.1. Fix the door to the door hinge and latching point fixture jig. 5.2. Conduct leveling of the door .The door shall not subject to any horizontal tensile load. 5.3. Selection of measuring points 5.3
9、.1. Select points 50mm below and 50mm above the door outside handle mounting portion (It may vary depending on the door shape) and record the position of each measuring point in “Attachment # 1”. 5.3.2. Select additional points on the weakest portions of the door outer panel other than those in 5.3.
10、1 and record the position of each measuring point in “Attachment # 1”. 5.4. Calibrate the displacement transducer, load cell and X-Y recorder 5.5. Mount the loading jig to the panel loading device and install it perpendicular to the door outer panel 5.6. Install the displacement transducer perpendic
11、ular to the door outer panel through the center hole of the loading jig. Installation shall be such that the displacement transducer will not get disturbed by forward and backward movement of the loading jig. 5.7. Apply loads of 50N, 200N and 400N step by step. For each load, measure the elastic + p
12、lastic deformation (E DOOR PANEL STIFFNESS & DENTABILITY TEST EDS-T-3208PAGE: 3/4 ISSUED DATE: 1990. 04. 09 REVISED DATE: 2008. 10. 15 VERSION: 4 GM DAEWOO Auto & Technology + P) and plastic deformation (P) to record them on “Attachment #1”. At the same time measure the displacement and load to plot
13、 them into graph. 5.8. After completing test in “5.7”, inspect the loading point on the outer panel under bright illumination and record presence of dent on Attachment #1. 5.9. Using the displacement-load curve obtained in “5.7”, read the oil canning of the side panel to record it on “Attachment #1”
14、. 5.10. For all measuring points, repeat “5.5” to “5.9”. 6. EVALUATION Reference target of door outer panel stiffness Under small load (50N Max.) : MAX. 0.050 mm/N Deformation (E+P) under 200N : Max. 15 mm Load generating dent : Min. 200 N. Load generating oil canning : Min. 150 NGM DAEWOO Auto & Te
15、chnology Attachment #1 DOOR PANEL STIFFNESS & DENTABILITY TEST POINT DIMENSION/DATA SHEET : 1. DIMENSIONmm DIMENSIONmmAFB50GCHDE2.TEST DATA SHEET mmP1 P2 P3 P4 P5 P650N E + PP200N E + PP400N E + PPOIL CANNING DENT CEGP5P2P4P1P3HFADBUNIT mmINITIAL OIL CANNING GENERATING LOAD DENT GENERATING LOAD DIVISION DIVISIONDIMENSIONmm DIMENSIONmmMODEL : 1. SKETCH OF MEASURING POINTS EDS-T-3208 PAGE : 4 / 4 VERSION: 4
