[논문]980MPa 초고장력 강판의 형상 동결성 향상을 통한 자동차 시트레일 부품 개발

박동환; 권혁홍

doi:10.14775/ksmpe.2016.15.5.137

980MPa 초고장력 강판의 형상 동결성 향상을 통한 자동차 시트레일 부품 개발
Development of Automotive Seat Rail Parts for Improving Shape Fixability of Ultra High Strength Steel of 980MPa 원문보기

한국기계가공학회지 = Journal of the Korean Society of Manufacturing Process Engineers, v.15 no.5, 2016년, pp.137 - 144

박동환 (경북하이브리드부품연구원) , 권혁홍 (대진대학교 컴퓨터응용기계설계공학과)

Abstract ▼ AI-Helper

This paper aims to ensure describe the a spring-back prevention technique for improving shape fixability by using an ultra-high strength steel sheet with 980 MPa to develop a lightweight seat rail parts. Ultra-high strength steel gives a potential for considerable weight reduction and a cost-effective way to produce energy efficient vehicles. The influence of a spring-back of seat rail parts on the shape fixability in forming processes was investigated to be solved by an adjustment of the appropriate tool design and process parameters. The computed results for improving shape fixability were in good agreement with the experimental results.

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문제 정의

Therefore, ultra-high strength steel sheet is applied to reduce weight of car frame by reducing material’s thickness and to improve strength at stability view point^[14-20]. This research is aimed to secure spring-back control technology to improve a shape fixability through an optimum process design of the seat rail die where ultra-high strength steel sheet with 980 MPa is applied.
This study was conducted by developing lightweight seat rail parts in order to secure a spring-back control technique for the improvement shape fixability using ultra-high strength steel sheet with 980 MPa. The results obtained through the study are as follows;

제안 방법

Forming process was designed as the total nine stages to improve shape fixability of the seat rail die wherein ultra-high strength steel sheet was applied. The reason why process was designed as a total of nine stages was to consider balancing of process so that concentrated load would not be imposed on the particular process to disperse the load.
6mm of ultra-high strength steel sheet CR980DP was used after wire cutting. Tensile strength test was carried out in order to investigate mechanical property of the steel sheet. Specimens for tensile strength were collected at 0°, 45°, and 90° towards rolling direction.
The data obtained by the tensile strength test were used for to investigate physical characteristics of the blank materials to analyze steel metal forming. Roughness and coefficient of friction at the contact face are important in analysis since forming is executed while blank and die, blank and punch, and blank and blank holder are contacted.
In the process design technology, process balancing is important for smooth flow between each process in order to form a final product after going through several processes. Therefore, a die process design was executed with a total of nine stages to improve shape fixability of seat rail die on which ultra-high strength steel sheet was adopted. For a smooth flow production between processes, a process balancing technique was applied rather than imposing an abrupt strain.

대상 데이터

A commercial finite element program Simufact Forming S/W was used to proceed the forming analysis by entering physical properties data of the ultra-high strength steel sheet. For punch and die, alloy tool steel STD11 was used, and materials thickness was made to 1.6 mm. Fig.

이론/모형

Therefore, formability is low, while elastic recovery is high which leads high possibility of spring-back. The shape fixability improvement technique in this study is a process design technology of the seat rail die in order to restrict spring-back of ultra-high strength steel sheet. Fig.

성능/효과

(2) Effective plastic strain by coefficient of friction was confirmed through forming analysis for the seat rail parts where in ultra-high steel sheet was applied, and optimum product could be manufactured through testing for the seat rail die of ultra-high strength steel sheet.

참고문헌 (20)

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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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상세보기
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원문보기 상세보기
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상세보기
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연합인증

980MPa 초고장력 강판의 형상 동결성 향상을 통한 자동차 시트레일 부품 개발
Development of Automotive Seat Rail Parts for Improving Shape Fixability of Ultra High Strength Steel of 980MPa 원문보기

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980MPa 초고장력 강판의 형상 동결성 향상을 통한 자동차 시트레일 부품 개발 Development of Automotive Seat Rail Parts for Improving Shape Fixability of Ultra High Strength Steel of 980MPa 원문보기

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제안 방법

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참고문헌 (20)

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박동환 (17) 권혁홍 (36)

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980MPa 초고장력 강판의 형상 동결성 향상을 통한 자동차 시트레일 부품 개발
Development of Automotive Seat Rail Parts for Improving Shape Fixability of Ultra High Strength Steel of 980MPa 원문보기

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