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Development of a new burr-free hydro-mechanical punching

Title
Development of a new burr-free hydro-mechanical punching
Author
한창수
Keywords
burr; fracture; hydrostatic pressure; hydro-mechanical punching; finite element method
Issue Date
2005-05
Publisher
ELSEVIER SCIENCE SA
Citation
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, v. 162, No. 524-529, Page. 524-529
Abstract
A new burr-free hydro-mechanical punching is developed, which consists of mechanical half piercing and hydro counter punching. In this hydro-mechanical punching, hydrostatic pressure delays fracture initiation. Smooth holes without any buff and small fracture face in the sheared surface are archived. During development of hydro-mechanical punching, finite element simulations for mechanical half piercing and mechanical counter punching is performed, which lead the method of hydro counter punching. To verify the significance of hydro-mechanical punching, conventional punching is performed under similar conditions and relatively larger portion of fracture surface is detected in the punching hole. Despite the quality of sidewall is not good enough yet, it is possible to make the hole shaped upright, reduce the roll-over radius and minimize the fracture surface by the optimization of process parameters. (c) 2005 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0924013605002177https://repository.hanyang.ac.kr/handle/20.500.11754/110196
ISSN
0924-0136
DOI
10.1016/j.jmatprotec.2005.02.110
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ROBOT ENGINEERING(로봇공학과) > Articles
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