1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards B.I.W SIDE PANEL STIFFNESS & DENTABILITY TEST Do Not Use on New Programs. Being Replaced by GMW14284 EDS-T-3005 ISSUED DATE: 1998. 03. 26 REVISED DATE: 2008. 10. 15 VERSION: 3 (Superceded) EDS-T-3005B.I.W SIDE PANEL S
2、TIFFNESS & DENTABILITY TEST PAGE: 1/4 ISSUED DATE: 1998. 03. 26 REVISED DATE: 2008. 10. 15 VERSION: 3 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 It is Superceded for all future projects and replaced by GMW14284. 1.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 stand
3、ard aims at specifying the procedures and specifications for evaluating oil canning Note1)and dent resistance of side outer panel of BIW (Body In White). Note 1)Oil Canning: Momentary drop of loads due to reversed surface curvature of the panel 2. SCOPE This standard is applied to side panels of pas
4、senger cars and multi-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
5、 of components and 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 coated with primer or to the higher stage, and those carrying the deadener and
6、side molding as the standard option shall be equipped with them 3.5. 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 4.2. Displacement transducer - Min. 50mm 4.3. Load cell capable of m
7、easuring Min. 500 N 4.4. X-Y recorder EDS-T-3005B.I.W SIDE PANEL STIFFNESS & DENTABILITY TEST PAGE: 2/4 ISSUED DATE: 1998. 03. 26 REVISED DATE: 2008. 10. 15 VERSION: 3 GM DAEWOO Auto & Technology 4.5. Panel loading device 4.6. Loading jig : See “Fig 1”. Fig 1 Loading jig 5. TEST PROCEDURES 5.1. Fix
8、the B.I.W onto the horizontal plate. 5.2. For selection of measuring points, select the weakest points of B.I.W panel and record the position of each point in “Attachment #1” 5.3. Calibrate the displacement transducer, load cell and X-Y recorder. 5.4. Mount the loading jig to the panel loading devic
9、e and install it perpendicular to the side panel. 5.5. Install the displacement transducer perpendicular to the side 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 ji
10、g. 5.6. Apply loads of 50N, 200N and 400N step by step. For each load, measure the elastic + plastic deformation (E + P) and plastic deformation (P) to record them on “Attachment #1”. At the same time measure the displacement and load to plot them into graph. 5.7. After completing test in “5.6”, ins
11、pect the loading point on the side panel under bright illumination and record presence of dent on Attachment #1. 5.8. Using the displacement-load curve obtained in “5.6”, read the oil canning of the side panel to record it on EDS-T-3005B.I.W SIDE PANEL STIFFNESS & DENTABILITY TEST PAGE: 3/4 ISSUED D
12、ATE: 1998. 03. 26 REVISED DATE: 2008. 10. 15 VERSION: 3 GM DAEWOO Auto & Technology “Attachment #1”. 5.9. For all measuring points, repeat “5.5” to “5.9”. 6. EVALUATION 6.1. Reference target of side panel stiffness at B.I.W side panel development 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 N 6.2. Compare the result with those of other competitive models. GM DAEWOO Auto & Technology Attachment #1 EDS-T-3005 PAGE: 4/4 VERSION: 3
