Intermediate die profile design for high-precision production of rectangular stainless-steel bars via new tandem drawing process
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
Metal bars with a rectangular cross-section are typically produced via a multi-stage drawing process involving only con-verging dies. Recently, a new tandem drawing process, in which an intermediate roll-die and a converging die are arranged in tandem, has gained attention owing to its lower production costs when compared to those of the conventional process. In this study, an opti-mized shape of intermediate roll-dies for the tandem drawing process is proposed to produce rectangular cross-section stainless steel bars with high precision. To decrease the unfilled space at the corners of the bars during the final converging die drawing process, the shapes of the intermediate roll-dies were designed on the basis of the virtual die method and the die offset for the corner filling meth-od. Their corner filling performances and deformation behavior were compared using finite element analysis. The results show that a reverse local offset along the flat part of the intermediate roll-die facilitates better corner filling, more uniform plastic deformation, and lesser damage susceptibility during the final converging die drawing process.
Abstract
Metal bars with a rectangular cross-section are typically produced via a multi-stage drawing process involving only con-verging dies. Recently, a new tandem drawing process, in which an intermediate roll-die and a converging die are arranged in tandem, has gained attention owing to its lower production costs when compared to those of the conventional process. In this study, an opti-mized shape of intermediate roll-dies for the tandem drawing process is proposed to produce rectangular cross-section stainless steel bars with high precision. To decrease the unfilled space at the corners of the bars during the final converging die drawing process, the shapes of the intermediate roll-dies were designed on the basis of the virtual die method and the die offset for the corner filling meth-od. Their corner filling performances and deformation behavior were compared using finite element analysis. The results show that a reverse local offset along the flat part of the intermediate roll-die facilitates better corner filling, more uniform plastic deformation, and lesser damage susceptibility during the final converging die drawing process.
참고문헌 (13)
- J. H. Kim, "New tandem draw-ing process through non-driven four roll-die and converg-ing die", Journal of Materials Processing Technology, 263, pp.470~478 (2019)
- S. K. Hong, "Study on Multi Shape Drawing Process for Drawing Force Reduction and Productivity Improvement", M. S., Advanced Precision Engineering Coopera-tion Course, pp.2017
- Y. C. Kim, "Intermediate die design system for the multi-stage drawing process", Trans-actions of NAMRI, 2000, pp.28, 69~74
- 지세인, "비대칭 사다리꼴 단면 선재의 다단 인발 공정설계", 소성∙가공, 24(3), pp.187~193 (2015), 한국소성∙가공학회
- 박정현, "중공형 LM-Guide Rail의 치수정밀도 향상을 위한 형상인발 금형 설계", 소성∙가공, 24(5), pp.340~347 (2015), 한국소성∙가공학회
- A. S. Geleji, "Bildsame Formgebung der Metalle" (1967), Akademie-Verlag
- 이태규, "이형인발공정 하중예측에 관한 연구", 소성∙가공, 18(4), pp.232~238 (2009), 한국소성∙가공학회
- Y. H. Cho, "Upper Bound Analysis of the Multi-roll Draw-ing Process Combined with the Undriven 4 Roll-dies", M. S., Precision Processing System of Mechanical Engi-neering Department, pp.2018
- 이상진, "Design of Roll Profile for LM-Guide Block in Horizontal- Vertical Shape Rolling by 3D-EFA", International Journal of Precision Engineering and Manufacturing, 16(4), pp.767~773 (2015), 한국정밀공학회
- 이상진, "Design of Roll Profile for Complex Shape in Shape Rolling by Combined 3D-EFA and BWT", International Journal of Precision Engineering and Manufacturing, 16(2), pp.281~286 (2015), 한국정밀공학회
- H. S. Jung, "Roll Design Method using Virtual Flow Line for Multi-Stage Profile Rolling Process", M. S., Me-chanical Engineering Department, pp.2018
- G. Kienel, "ASM Handbook, vol. 15", pp.393~425 (1988)
- J. H. Kim, "A four-roll squeeze pointing machine for a shape-drawing process", Metals, 8(6), pp.427~ (2018)