• Journal of the Korea Institute of Building Construction
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• v.8 no.6
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• pp.161-166
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• 2008

This study is focused on the welding performance of automatic gas pressure welding machine adapted to korean construction site by external appearance investigation. As gas pressure welding is more economical and has good performances compared with other steel bar jointing methods, as arc welding and mechanical joint etc, in Japan, the gas pressure welding is one of the typical connection of steel reinforcement when connecting the D29 and thicker steel bars, But in Korea, gas pressure welding joint method is not widely used caused by the shortage of skilled workers. so to activate the gas pressure welding in Korea, the automatic gas pressure welding machine is developed. In this study, the welding performances of gas pressure welding joint samples using korean automatic gas pressure welding machine are measured by external appearance investigation - blown diameters, blown length, welding face disagreement, central axis eccentric ratio, bending, sag and crack. The results of welding performances on the gas pressure welding joint samples show that samples are satisfied with the standard value regulated in KS D 0244 and JIS Z 3120.

• Journal of the Korea Institute of Building Construction
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• v.5 no.3 s.17
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• pp.131-138
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• 2005

The study is focused on the settling the developing direction of korean gas pressure welding machine which can be applied in korean construction sites with moderate and high performance. Gas pressure welding is more economical and has good performances than other steel bar jointing methods, as arc welding and mechanical joint etc. Therefore in Japan, the gas pressure welding, which has less loss of steel bars and low performance of joints, when connecting the D29 and thicker steel bars, Is one of the typical connection of steel reinforcement. But in Korea, the gas pressure welding method is not widely used caused by the shortage of skilled workers, and this situation in Korea can not be solved in short period. The training of the skilled workers takes long period(around $6\~10$ years), and there is no certification system for gas pressure welding. So to activate the gas pressure welding in Korea, the development of the automatic gas pressure welding machine is necessary, which gives regular performance of the steel bar joints and can be operated by not sufficient skilled workers. The automatic gas pressure welding machine was developed in Japan, but this machine has many problems when applied in korean construction sites. Therefore, it is necessary to develop a korean automatic gas pressure welding machine to overcome this problems. To develop korean automatic gas pressure welding machine, the problems, which shows when applied in korean construction sites, need to be investigated. According to the investigation, counterproposals are presented for the pragmatical development of the korean automatic gas pressure welding machine.

• Journal of the Korean Society for Precision Engineering
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• v.1 no.2
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• pp.15-18
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• 1984

우리나라도 자동차공업의 시대에 돌입되고 있고, 또 그 수출에도 많은 실적을 올리고 있는때에, 자동차공업에서 그 생산공정상 마찰용접법을 빼놓을 수 없는 시기에 이르렀다고 생각되어, 이에 관하여 해설하고자 한다. 마찰용접기는 자동차공업에 도입됨과 동시에 그 모양, 기능 및 부속장치의 변혁이 이루어졌다고 말할 수 있다. 가까운 일본에서는 1963 년 5 월에 (주)풍전 자동기계제작소에서 마찰용접기 제 1호기가 발표되어진 이래, 약 13 년 후에 자동차 관련부품에 대한 마찰용접기의 적용비율이 전 사용기계의 반정도를 차지하고 있다고 한다. 자동차 공업에 대한 마찰용접은 비용의 감소 보다는 품질의 우수화를 위한 압접이음을 얻는 것을 목적으로 실용화가 시도되어지고 있는 경우가 많다. 여기에 자동차 공업에 대한 마찰용접의 실제를 서술하고, 마찰용접기술 도입의 참고로 했으면 한다.