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http://dx.doi.org/10.5916/jkosme.2016.40.4.314

A forging die design to improve the flower shape of flange bolt  

Kim, Kwan-Woo (Department of Mechanical Engineering, Chungbuk National University)
Lee, Geun-Tae (Department of Precision Mechanical Engineering, Chungbuk National University)
Cho, Hae-Young (Department of Mechanical Engineering, Chungbuk National University)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.40, no.4, 2016 , pp. 314-319 More about this Journal
Abstract
Flange bolt has a circular flange under the head that acts like a washer to distribute the clamping load over a large area. Flange bolt has usually been manufactured by cold forging. Flower shape defect occurs in the flange forging stage. This defect causes lack of dimensional accuracy and low quality. So it is needed to improve these forging defects. In this study, die design method for flower shape defect of flange bolt was suggested. In order to improve flower shape defect, inner diameter of the addition die in conventional forging process was modified. The forging process with applied modified die was simulated by commercial FEM code DEFORM-3D. The simulated results for modified die were confirmed by experimental trials with the same condition.
Keywords
Flange bolt; Flower shape defect; Finite Element Method; Cold forming;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
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