1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards TRUNK LID PANEL STIFFNESS & DENTABILITY TEST Do Not Use on New Programs. Being Replaced by GMW14284 EDS-T-3213 ISSUED DATE: 1990. 10. 17 REVISED DATE: 2008. 10. 15 VERSION: 4 (Superceded) EDS-T-3213TRUNK LID PANEL STI
2、FFNESS & DENTABILITY TEST PAGE: 1/4 ISSUED DATE: 1990. 10. 17 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 It is Superceded for all future projects and replaced by GMW14284 1.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
3、 aims at specifying the procedures and specifications for evaluating oil canning and dent resistance of the trunk lid outer panel. Note 1). 2. SCOPE This standard is applied to the trunk lid of passenger cars. Particulars not specified here shall follow the direction in drawings. 3. SAMPLE 3.1. In t
4、he 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 and parts meeting material and dimensional requirements in drawings. Following consultation with the design enginee
5、r, however, they may be composed of parts for developmental use. 3.3. Samples shall be the trunk lid in white furnished with parts constituting the trunk lid. 3.4. Samples shall be coated with primer or to the higher stage. 3.5. Samples shall show no sign of flaws, deformation or scratch on the surf
6、ace and be free from loads that may affect test. 4. TEST EQUIPMENT 4.1. Horizontal plate 4.2. Displacement transducer - Min. 50mm 4.3. Load cell capable of measuring min. 500 N 4.4. X-Y recorder Note1) OIL CANNING : Momentary drop of loads due to reversed surface curvature of the panel 4.5. Panel lo
7、ading device 4.6. Trunk lid hinge and trunk lid edge fixture jig EDS-T-3213TRUNK LID PANEL STIFFNESS & DENTABILITY TEST PAGE: 2/4 ISSUED DATE: 1990. 10. 17 REVISED DATE: 2008. 10. 15 VERSION: 4 GM DAEWOO Auto & Technology 4.7. Loading jig : See “Fig 1”. Fig 1 Loading jig 5. TEST PROCEDURES 5.1. Fix
8、the trunk lid to the trunk lid hinge and trunk lid edge fixture jig. 5.2. Conduct leveling of the trunk lid. The trunk lid shall not subject to any horizontal tensile load. 5.3. Selection of measuring points. 5.3.1. Select 6 points around front edge center on trunk lid outer panel at an interval of
9、50mm. (See Attachment # 1.) 5.3.2. Select 1 or 2 additional points on the trunk lid outer panel other than those in 5.3.1 and record the position of each measuring point in “Attachment # 1”. 5.4. Calibrate the displacement transducer, lode cell and X-Y recorder. 5.5. Mount the loading jig to the pan
10、el loading device and install it perpendicular to the trunk lid outer panel 5.6. Install the displacement transducer perpendicular to the trunk lid outer panel through the center hole of the loading jig. Installation shall be such that the displacement transducer will not get disturbed by forward an
11、d backward movement of the loading jig. 5.7. 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 with
12、 the X-Y recorder (displacement: X axis, load: Y axis). 10 2512Rubber (Shore hardness:Hs 705) EDS-T-3213TRUNK LID PANEL STIFFNESS & DENTABILITY TEST PAGE: 3/4 ISSUED DATE: 1990. 10. 17 REVISED DATE: 2008. 10. 15 VERSION: 4 GM DAEWOO Auto & Technology 5.8. After completing test in “5.7”, inspect the
13、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 and record it on “Attachment #1”. 5.10. For all measuring points, repeat “5.5” to “5.9”. 6. EVALUA
14、TION 6.1. Reference target of trunk lid outer panel stiffness 6.1.1. Under small load (50N Max.) : MAX. 0.050 mm/N 6.1.2. Deformation (E+P) under 200N : Max. 8 mm 6.1.3. Load generating oil canning : Min. 150 N Load generating dent : Min. 200 N GM DAEWOO Auto & Technology Attachment #1 536/,-*%1/-45
15、*/&445&4510*/5%*.&/4*0/%“5“4)&5 0 & | $ P( 3&3&/$&%“5“8&“,10*/5 $ NN 115&45%“5“4)&5& 5&4510*/51 1 1 1 1 1 1 1a& 11& 11& 110*-$“/*/( %&/5 111111 5 )*/(& $ MODEL : 1. SKETCH OF MEASURING POINT HINGE UP/DOWN FIXTURE UNIT : mm LATERAL REFERENCE LINELONGITUDINALREFERENCE LINE*) POSITION OF WEAK POINT FOR REFERENCE DATATEST LOAD(N) INITIAL DOWNAWRD DISPLACEMENT FIXTURE UNIT : mmFROM LONG. LATERAL REFERENCE LINE(mm) LONG. LATERAL P7 P8 OIL CANNING GENERATING LOADDENT GENERATING LOADDOWNWARD LOADINGEDS-T-3213 PAGE : 4/4 VERSION : 4
