• Journal of the Korean Society of Propulsion Engineers
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• v.19 no.6
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• pp.64-71
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• 2015

Spinning process is generally used for manufacturing axisymmetrical, thin-walled thickness and hollow circular cross-section parts. Traditional spinning technology is classified to conventional spinning and power spinning(shear spinning and flow forming). Literature surveys of spinning application for regenerative cooling chamber and divergent nozzle of liquid propellent rocket thrust chamber have been conducted. Most spinning technology has been used mandel for manufacturing chamber and nozzle. Recently, hot spinning has been used much compared to traditional cold spinning.

• Journal of the Korean Society of Propulsion Engineers
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• v.16 no.1
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• pp.79-85
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• 2012

This study investigates mainly on the technical development trend through the published papers, such as asymmetric metal spinning, metal spinning in heat treatment conditions and free mandrel spinning. Although the classical spinning, so called conventional, shear, tube spinning, uses the axisymmetric shaped mandrel(which is same inner shape of the final product), in new technologies the mandrel can be asymmetric one, spinning can be done without mandrel and also spinning is done with heat treatment together.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.04a
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• pp.265-271
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• 2011

This paper investigates mainly on the technical development trend such as asymmetric technology and the metal spinning in heat treatment conditions. Although the classical spinning, so called conventional, shear, tube spinning, uses the axisymmetric shaped mandrel(which is same inner shape of the final product), new technology does not use it. and also spinning can be done with free mandrel.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2010.11a
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• pp.241-244
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• 2010

This paper investigates mainly the new free mandrel technology of the metal spinning. Although the classical spinning, so called conventional, shear, tube spinning, uses the axisymmetric shaped mandrel(which is same inner shape of the final product), new technology does not use it.

• Journal of the Korean Society of Propulsion Engineers
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• v.11 no.1
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• pp.27-33
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• 2007

The shear spinning has been used to produce thin angled cone of parts, with reduced forming force and enhanced mechanical and surface quality for a good finished part, compared with other method formed parts. So shear spinning technique is used widely in industrial production. Especially shear spinning and flow forming techniques are used frequently in automotive, aerial, defense industry. In this paper, finite element method analysis of shear spinning for a cone shape workpiece is carried out to study effects of forming depth and lead angle on forming force. The axial and radial forces on several forming depth and lead angle conditions are obtained.

• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.443-444
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• 2015

본 연구에서는 GX 프로그램의 하나인 스피닝 운동을 모델로 사용자의 골격을 추적하여 강사 아바타와의 동작 일치율을 판단하고, 스피닝 운동 중 감성을 분석하여 사용자에게 맞춤형 운동을 추천한다. 또한 현장감과 몰입감 증대를 위해 바람, 조명, 진동 등 다양한 실감효과를 제공하는 스포테인먼트 스피닝 시스템을 개발하고, 가정에서 원격지의 사용자와의 경연 서비스를 제공할 수 있는 실감 체험형 시스템을 제안한다.

• Journal of the Korean Vacuum Society
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• v.12 no.1
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• pp.7-15
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• 2003

Spinning Rotor Gauge (SRG) has been used to transfer standard gauge for international comparison at the high vacuum standards. We calibrated a spinning rotor gauge by using dynamic calibration system (DCS) that was a national high vacuum standards system. And its uncertainties were evaluated with the International Organization for Standardization (ISO), they were recognized ai A type uncertainty, B type uncertainty, combined Standard uncertainty, and expanded uncertainty. The combined standard uncertainties were $1.8007\times10^{-5}$ Pa ~ ~$4.8422\times10^{-5}$ Pa for this spinning rotor gauge.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2006.05a
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• pp.387-390
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• 2006

Conventional spinning, shear forming and flow forming techniques are being utilized increasingly due to the great flexibility provided for producing complicated parts, enabling customers to optimize designs and reduce weight and cost, all of which are vital, especially in automotive industries, space shuttle, a munitions industry. The deformation mechanism of conventional spinning and shear forming is studied in this paper through analysis. The forming loads of a spin formed dome in an Al launch vehicle fuel tank was studied analysis and a simple FE model to predict the forming loads of the dome was proposed. The analysis is carried out to study the effects of feed rates and thickness reduction on material flow.

• Journal of the Korean Society of Propulsion Engineers
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• v.18 no.6
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• pp.88-95
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• 2014

Spinning process to inner wall has been applied for reducing the weight of regenerative cooling chamber of liquid propellent rocket engine. The fractures of the blanks of cylinder part and nozzle throat part have been observed during spinning processes. In order to overcome the problem, the mandrel and the blank shape have been modified, and the inner wall was successfully manufactured through the modifications. The manufactured spinning prototype of nozzle throat part was successfully bulged without cracking and necking, and it was confirmed to secure sufficient formability necessary for fabricating thrust chamber.

• Textile Coloration and Finishing
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• v.13 no.3
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• pp.203-210
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• 2001

본 연구에서는 솔로 방적사의 물성과 이들 실로 만들어진 직물의 물성을 분석해 봄으로서 솔로 방적사의 최적 생산조건과 실의 생성 미케니즘을 분석 연구하고자 하였다. 이를 위해서 7가지의 솔로 스펀 롤러를 제작하고 이를 이용하여 방적사를 제조한 후 일반 링 방적사와 물성 비교 분석에 의한 최적 생산 조건 및 솔로 스피닝의 미케니즘을 조사하였다 그리고 최적 솔로 스피닝 롤러에 의해 만들어진 솔로 스펀 방적사를 이용하여 직물을 제직하여 일반 링 방적사 직물과 물성 비교를 통하여 솔로 스피닝 직물의 현장 적용성을 검토하였다.