1、GM DAEWOO Auto & Technology EDS Engineering GM DAEWOO Auto & Technology Standards TEST RESULTS OF HOOD LATERAL STIFFNESS Do Not Use on New Programs. Being Replaced by GMW14288 EDS-T-3227 ISSUED DATE: 1998. 07. 07 REVISED DATE: 2008. 10. 15 VERSION: 3 (Superceded) EDS-T-3227TEST RESULTS OF HOOD LATER
2、AL STIFFNESS PAGE: 1/3 ISSUED DATE: 1998.07.07 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 It is Superceded for all future projects and replaced by GMW14288. 1. PURPOSE This standard defines test
3、method of lateral stiffness of the hood for exact fitting during use of an actual vehicle. 2. SCOPE Passenger cars and multi-purposed passenger cars. Matters other than those defined in this standard will be pursuant to the regulations of drawings. 3. TEST SAMPLES 3.1. A supplier should notify the c
4、ompany of any changes or deviation in design. 3.2. The test components should consist of components satisfying dimensions, materials and other requirements specified in the drawings. However, the components can be configured for the purpose of development upon consent with designers. 3.3. The test c
5、omponents consist of a hood A in white installed with components of a hood, a hood hinge and a body in white. 3.4. The test components should at least be coated with primer. 3.5. The test components should be free from any cracks, deformation or scratches that may affect the test results. 4. TEST EQ
6、UIPMENT 4.1. Leveling surface table 4.2. Fixing jig of B.I.W. (Body in White) 4.3. Length displacement transducer available for measurement of a length longer than 50 mm 4.4. Device fixing the length displacement transducer 4.5. Signal amplifier 4.6. Load cell (for measurement of weight larger than
7、20 kgf) 4.7. Recorder (for recording the test results in a load vs displacement graph) EDS-T-3227TEST RESULTS OF HOOD LATERAL STIFFNESS PAGE: 2/3 ISSUED DATE: 1998.07.07 REVISED DATE: 2008. 10. 15 VERSION: 3 GM DAEWOO Auto & Technology 5. TEST PROCEDURE 5.1. Fix B.I.W. (Body in White) on the surface
8、 table with the B.I.W. fixing jig. 5.2. Should there be no gas spring for support of the hood installed, install the pivot A-support hood and the rod A-hood hold open on the designated connection position (typically upper right end of the front panel). If the gas spring for support of the hood, inst
9、all the gas spring on a condition identical with that of an actual vehicle. 5.3. Connect the hood and the hinge to the B.I.W. 5.4. Securely support the hood with the rod A-hood hold open with the hood fully open to restrict downward movement of the hood. 5.5. Install the length displacement transduc
10、er on a symmetrical point of the loading point to measure the lateral displacement of the hood (Refer to fig. 1). 5.6. Connect the signal amplifier and the cable jack of the length displacement transducer to each other. 5.7. Calibrate the signal amplifier and the recorder. 5.8. Slowly apply the load
11、 on the edge line of the hood in the lateral direction up to 15 kgf using the load cell to measure the lateral stiffness (Refer to fig. 1). 5.9. After applying the load, measure the displacements of elasticity + plasticity (E + P) and plasticity (P), and record the results on the data sheet (table 1
12、). Draw the displacement in X-axis and the load in Y-axis in a graph with the record. 6. EVALUATION Compare and evaluate the permissible target value of the lateral stiffness of the hood with the test results on other vehicle models with the displacement (E + P) at the symmetrical point upon loading
13、 15 kgf in lateral direction. GM DAEWOO Auto & Technology Table 1 4FUUJOHVQ)PPE-BUFSBM4UJGGOFTTUFTU%BUB4IFFU.PEFM5FTUDPNQPOFOUTTFUUJOHVQ5FTU%BUB4IFFUDisplacement at symmetrical point upon loading 15 kgf in lateral direction (unit: mm)& 11/PUF4FUUJOHVQUIFUFTUDPNQPOFOUTNBZWBSZVQPONPEFMPSTBNQMFTIBQF-PBEBQQMZJOHQPJOU IPPEFEHFMJOF EJSFDUJPO%JTQMBDFNFOUNFBTVSFNFOUQPJOU)JOHFGJYJOHQPTJUJPO4VQQPSUXJUISPE“IPPE)PMEPQFOEDS-T-3227 PAGE : 3 / 3 VERSION: 3
