• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.04b
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• pp.336-341
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• 1995

종래의 Cam 구동방식 Pirn Winder에서는 낮은 권취속도와 만권시 권취 Bobbin이 Cradle에서 이탈될 때 권취 Yarn의 대량손실, Pirn 형성시 사층의 붕괴에 따른 과다권취등 기술적 난제가 대두되었다. 이러한 문제점을 해결하기 위하여 구미선진국에서는 Micom 제어 Pirn Winder가 개발되었다. 국내에서는 이 기계를 전량 수입에 의존하고 있어 수입 대체가 시급하지만 선진국의 기술보호주의 때문에 기술도입도 어려운 실정이다. 본 논문에서는 Micom제어 Pirn Winder에서 기본적으로 사층이 무너지지않기 위한 권취량, Traverse속도, 사속(Yarn Speed), 스핀들의 각속도 등을 결정함으로써 기구 학적 제어를 할 수 있는 알고리즘을 제시하고 컴퓨터 모사실험을 통하여 타당성을 보였다.

• Proceedings of the KSME Conference
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• 2000.11a
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• pp.590-595
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• 2000

On the contrary to the increasing needs of shape qualities, most of quality inspections are carried out by manual or operator's insight. To find the causes of shape inferiority, it is required to gather and analyze the shape measurement data. As a result the winding profile measurement system ($TELE-SCANNER^{(R)}$) is developed to analyze the coiling process and automate the manual measuring process for winding profile of hot-rolled coils. The winding profile measurement system measures and analyzes winding profile shapes of hot-rolled coils, and classifies them into several dominant patterns that are related to normal or abnormal mechanical conditions of down-coiler. The system also contains analysis software to quantify the winding profile shapes and patterns, and to produce statistics to help search the causes of profile shape inferiority.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1996.11a
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• pp.413-418
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• 1996

Alternate pirn winding is more difficult to control than others because starting points of its traverse strokes are changed alternately through the winding operations. However, the alternate pirn winding is ye useful method because the yarn can be hardly broken when it is unwinded from full packaged bobbin. This paper presents kinematic control algorithm for the alternate pirn. The proposed algorithm can decide the values of control variables such as bobbin speed and traverse speed from the given input parameters and constraints by using the kinematic relations of the winding mechanism. The compute simulations and experimental verifications of the developed winding control algorithm are carried out It is concluded that the proposed algorithm is an efficient and reliable alternative to traditional trial and error control methods.

• Journal of Institute of Control, Robotics and Systems
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• v.21 no.9
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• pp.869-874
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• 2015

We developed an LSDC (Load Shift and Load Distribution Control) technology in order to improve coil quality and productivity by reducing tension fluctuation especially for the tail of the strip in the down coiler in hot strip mills. To adapt the new controller, the torque and speed distribution between the zero pinch roll, pinch roll, and mandrel are needed. The proposed controller is a combination of an LSC to share the tension between the mill stand and the mandrel, and an LDC to shift the torque load from the zero pinch roll to the pinch roll. From the simulation, the proposed controller is verified under the torque disturbance. Using a field test, the torque deviation decreased by nearly 50% through utilization of the LSDC control.

• Proceedings of the Korean Fiber Society Conference
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• 1998.04a
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• pp.173-178
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• 1998

섬유산업의 발달로 정방공정이 자동화, 고속화되고 있으며 국제적 경쟁이 치열하게 전개됨에 따라 방적공정에서의 생산성이 매우 중요해 졌다. 링 정방법은 링위를 회전하는 traveller에 의한 꼬임부여와 중앙에 위치한 spindle의 회전에 의하여 권취가 이루어진다는 간단한 작동 원리를 바탕으로 하고 있으며 현재 개발된 정방공법중 생산 유연성이 가장 크고 제품의 물성이 우수하여 널리 이용되고 있는 공법이다.(중략)