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980MPa급 초고장력강 비대칭 Seat Rail 성형에 관한 연구

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Abstract
Recently, environmental pollution and rapid increase of automobile demand have strengthened automobile fuel consumption and exhaust gas regulations in various countries, and global automobile companies have been continuously reducing the weight of vehicles to improve fuel efficiency. Therefore, the material of the body has to be made thinner and higher in strength as it has to be made lighter with improved performance.
Since the seat occupies 3 to 5% of the weight of the vehicle, researches for developing lightweight sheet components utilizing Ultra High Strength Steel have been continuously carried out. Among them, the seat rail is the most actively studied part of the application of UHSS.
Roll forming and cold press forming are most commonly used for sheet rail forming of UHSS. Roll forming is advantageous for manufacturing Long- Rail, but cold forming is preferred because of its high productivity.
Therefore, in this study, we developed an efficient process by predicting the problems occurring in 980Mpa asymmetric lower rail development using cold press forming technology. An appropriate process to control the spring back and twisting problems caused by the asymmetric bending process of UHSS is presented through analysis and experiment.
 After the die development and bending process, the major dimensional accuracy of the product was confirmed. Finally, the product was assembled with Seat rail, and the effectiveness of the manufacturing process was verified by evaluating clearance, operating force, and strength.
Author(s)
박시후
Issued Date
2019
Awarded Date
2019-08
Type
Dissertation
Keyword
Asymmetric Seat RailFormingUltra High Strength SteelSpring-back
URI
https://oak.ulsan.ac.kr/handle/2021.oak/6050
http://ulsan.dcollection.net/common/orgView/200000222972
Alternative Author(s)
Sihu Park
Affiliation
울산대학교
Department
산업대학원 자동차선박기술전공
Advisor
이경식
Degree
Master
Publisher
울산대학교 산업대학원 자동차선박기술전공
Language
kor
Rights
울산대학교 논문은 저작권에 의해 보호받습니다.
Appears in Collections:
Industry > E-Vehicle Technology
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