Search | Korea Science

신용승;김병희;김헌영
- Proceedings of the Korean Society of Precision Engineering Conference
- /
- 2000.11a
- /
- pp.494-497
- /
- 2000
This paper presents the fine-shearing experimental investigation using brass sheets. Shearing including blanking, trimming, piercing, etc is one of the most frequently used processes in sheet metal manufacturing. In this study, an individual set of tooling was designed and fabricated to carry out experiment for shearing process. In order to investigate the effect of shearing surface correspond to die clearance, the profile of shearing surface was examined by using microscope. Futhermore, the relationship between shearing force and the profile of shearing surface was considered.
PDF

신용승;김병희;김헌영
- Proceedings of the Korean Society of Precision Engineering Conference
- /
- 1997.10a
- /
- pp.523-526
- /
- 1997
Sheanng is one of the most important operating processes in the field of sheet metal manufacturing. Compared with casting, forging and machining, shearing is very economical to obtain the desired shape. In recent years there has been increasing the use of shearing process in the manufacturing of small and light electronic components. In this paper, it has been researched the experimental investigation to examine the mfl uence of shearing process parameters such as clearance and lower holder configuration. Through the experiment results, the more narrow clearance gives the smaller burr height and the removal of lower holder makes the worse sheared surface. And FE simulation of shearing process using DEFORM-2D were camed out and the results compared w~th experimental studies
PDF

고대림;전치용;김진무;안흥천
- Proceedings of the Korean Society of Precision Engineering Conference
- /
- 2004.10a
- /
- pp.1440-1443
- /
- 2004
Shearing including punching, blanking, trimming, slitting, etc is one of the most frequently used processes in sheet metal manufacturing. It has been widely used for manufacturing autobody, electronic components, aircraftbody, etc. In this paper, it has been researched by the experiment to examine the effect of burr height corresponding to die clearance, cutting angle, tool sharpness, etc. This paper presents the experimental results with using Al alloy sheet.
PDF

Jeong, Jun-Gi
- Journal of the Korean Society for Precision Engineering
- /
- v.17 no.9
- /
- pp.62-69
- /
- 2000
Uneven clearances in the left and right sides of a press die cause deformation of the punch in precision shearing process. This deformation results from the compression stress and bending moment from shearing force in vertical direction and from the side force in horizontal direction acting to the punch, In this study the behavior of punch deformation is investigated in order to clarify the deformation state of the punch by using strain gauge deformation to shearing force side force bending moment radius of curvature and shear plane of the punch. Also we presented the calculation method of deformation size for the punch.
PDF