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신재균,이종기,안홍태 한국섬유공학회 2004 한국섬유공학회지 Vol.41 No.3
A finite element model for the analysis of a beat-up process is investigated. One of the main purposes of the analysis is to find the beat-up force required to obtain a plain weave of some given density. The proposed weave model includes one warp and two of the most recently inserted wefts. The warp is considered to be elastic while the wefts are assumed to be rigid in the present model. We applied our method to interpret the possible reason of a special type of abnormal structure frequently found in weaving practices, where uneven pickspacing repeats itself periodically. Results from sample calculations suggest a possibility that the special type of the uneven pickspacings can happen even under perfect machine conditions.
정병묵,이성건,안홍태 嶺南大學校 工業技術硏究所 2002 工業技術硏究所論文集 Vol.30 No.1
In the texture manufacturing process, it is very important to uniformly maintain the thickness of yarn because the quality of texture is affected by dint of the quality of yarn. However, the production of chemical yarn is made of more than 10 strands because of productivity. The united yarn has to be splitted into independent strand before making texture. In this process, most of splitting machine has too heavy and varied tension because of its structural problem. To reduce the tension of yarn, this article proposes a splitting machine with a tension controller. The control algorithm is mainly a rule-based fuzzy logic because of its non-linearity and yarn's high velocity. Using this controller, the tension of yarn is 3 or 4 times lower than that of the traditional splitting machine. Through the development of a tension controlled splitting machine, we can get yarn of good quality and expect high productivity because it is possible to reduce the splitting time of yarn.
신재균(Jae Kyun Shin),이종기(Jong Ki Lee),안홍태(Hong Tae Ahn) Korean Society for Precision Engineering 2004 한국정밀공학회지 Vol.21 No.1
A method for the design of a disk cam with a remote follower is presented. ADAMS software is utilized for the design process. The whole process is applied for the design of a cam profile to be used in a tappet shedding device of a shuttle loom. First the desired motion of the remote follower, the hearld frame in this case, is determined to improve the characteristic of a certain weaving process. Next, the desired displacement data is input to the ADAMS software and the cam profile is obtained as an output. To test the validity of the proposed method, designed cams were actually manufactured and implemented on a experimental loom. And with the help of potentiometer type displacement transducers, the motion of the remote followers were actually recorded. And the result was sufficient to prove the validity of the presented method.