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윤재웅(Jae-Woong Youn) 한국생산제조학회 2009 한국생산제조학회지 Vol.18 No.1
In most multi-stage forging processes, the die spotting process or alignment of punch and die depends on the manual operation. It results a very tedious and inefficient procedure, thus the proper measurement system is needed to improve productivity and accuracy. This paper proposes a measurement system for alignment of die and punch which has a cylindrical holder, and describes the system concepts using 3 eddy-current displacement transducers and precise measurement jig. In order to apply this measurement system to real situations, the measuring procedures and system calibration method, etc. are proposed. Finally, the accuracy and productivity of this measurement system are investigated in this paper.
델타스폿용접을 이용한 이종소재 웰드본딩공정 시 표면 거칠기 부여 가공방법의 영향
김영현,김재웅,김지선,김영곤,표창민 한국기계가공학회 2020 한국기계가공학회지 Vol.19 No.11
The demand for lightweight materials and high-strength steel has rapidly increased to help reduce theweight of a vehicle body; it improves the fuel efficiency of automobiles and provides passenger safety. Additionally, as the material becomes thinner, the demand for its resistance against corrosion becomes higher. Hence, the application of the surface-treated steel sheet has surged rapidly. In this study, a weld bondingexperiment using a delta spot welding machine is performed on a thin sheet of a different material(Al6061-T6/GA440). The thickness of the material was kept at 1 mm to reduce the weight of the automobilebody parts. Additionally, the purpose of this study is to control the heat input by applying the weldingconditions of a multi-stage pressure pattern to improve corrosion resistance shear strength. The analysis ofnugget diameter measurement, shear tensile test, and salt spray test was performed to achieve the aim.