Recently, active travel activities increase, the capacity of the trunk is increasing more than that of the initially developed vehicle, provides convenience improvement that can load lots of travel luggage. Therefore, the ADAC and ANEC carried out tests for the possibility and risk of injury to ...
Recently, active travel activities increase, the capacity of the trunk is increasing more than that of the initially developed vehicle, provides convenience improvement that can load lots of travel luggage. Therefore, the ADAC and ANEC carried out tests for the possibility and risk of injury to passengers due to a frontal collision or a sudden stop of the loaded luggage. The automotive seat back frame is applied by spot welding and CO₂ welding in most manufacturing sites in Korea, but the world's major automobile manufacturing industry adopts laser processing device to improve welding productivity and quality. The purpose of this study is to investigate the analysis of tendency and optimum conditions by comparing the ultimate tensile strength of spot welding and laser welding for each pattern by fabricating lap joint welding tensile specimens of carbon steel pipe (STKM13A 1.6 mm, STKM13A 3.2 mm) and high tensile steel plate panels (SPFC590 0.65mm, SPRC440 0.65mm) for automotive seat back frames. Using the analysis software Midas NFX, we reproduce the luggage impact test of ECE 17 Annex 9 of the European Regulations and predicted the rigidity according to the welding pattern.In the future, after conducting the thread test (Sled Test), when the large difference (10% error) is generated between the analysis and actual data comparison, the analysis condition is reestablished from the physical property value of the material, and the reliability of the data It is thought that research to enhance it is necessary. A fatigue endurance test was carried out by repeating a constant load of 45,000 times for each center line of the sheet after making a rear sheath back frame for laser welding of each pattern. As a result of the test, welding segregation, deformation, and unlocking were not performed. After that, it is necessary to estimate the life of the pattern by measuring the fatigue limit life of each pattern in order to confirm the fatigue durability of the actual product. In the case of Pattern II, the welding speed is slower than other welding, but the tensile strength is the highest. Therefore, it is necessary to apply the pattern II because it is the automobile part that requires the safety most closely with the passenger is considered.
Recently, active travel activities increase, the capacity of the trunk is increasing more than that of the initially developed vehicle, provides convenience improvement that can load lots of travel luggage. Therefore, the ADAC and ANEC carried out tests for the possibility and risk of injury to passengers due to a frontal collision or a sudden stop of the loaded luggage. The automotive seat back frame is applied by spot welding and CO₂ welding in most manufacturing sites in Korea, but the world's major automobile manufacturing industry adopts laser processing device to improve welding productivity and quality. The purpose of this study is to investigate the analysis of tendency and optimum conditions by comparing the ultimate tensile strength of spot welding and laser welding for each pattern by fabricating lap joint welding tensile specimens of carbon steel pipe (STKM13A 1.6 mm, STKM13A 3.2 mm) and high tensile steel plate panels (SPFC590 0.65mm, SPRC440 0.65mm) for automotive seat back frames. Using the analysis software Midas NFX, we reproduce the luggage impact test of ECE 17 Annex 9 of the European Regulations and predicted the rigidity according to the welding pattern.In the future, after conducting the thread test (Sled Test), when the large difference (10% error) is generated between the analysis and actual data comparison, the analysis condition is reestablished from the physical property value of the material, and the reliability of the data It is thought that research to enhance it is necessary. A fatigue endurance test was carried out by repeating a constant load of 45,000 times for each center line of the sheet after making a rear sheath back frame for laser welding of each pattern. As a result of the test, welding segregation, deformation, and unlocking were not performed. After that, it is necessary to estimate the life of the pattern by measuring the fatigue limit life of each pattern in order to confirm the fatigue durability of the actual product. In the case of Pattern II, the welding speed is slower than other welding, but the tensile strength is the highest. Therefore, it is necessary to apply the pattern II because it is the automobile part that requires the safety most closely with the passenger is considered.
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