박종우 2024-01-21T07:12:16Z 2024-01-21T07:12:16Z 2021-09-06 2004-04 1225-696X https://pubs.kist.re.kr/handle/201004/137704 Recently, instead of a matched die forming method requiring a high cost and long delivery term, a multi-point dieless forming method using a pair of matrix type punch array as flexible dies has been developed. Since the conventional multi-point dieless forming method has some disadvantages of difficulty in precise punch control and high-cost of equipment, a new concept of multi-point dieless forming method combined with an elasto-forming method has been suggested in this study. For optimal selection of elastomers, compression tests of rubbers, polyethylene and foams were carried out together with FEM analysis of the deformation behavior during sheet forming process using a rigid punch and elastomers. Compressive strain was concentrated on the upper central area of the elastomer under the punch, and the rubber exhibited higher concentration of the compressive strain than foams. Two-dimensional curved surface was formed successfully by the multi-point elasto-dieless forming method using an optimal combination of rubber and foam materials. 한국소성가공학회 탄소중합체를 이용한 다점 박판 성형 Multi-Point Sheet Forming Using Elastomer Article 2 소성가공, v.13, no.2, pp.129 - 136 소성가공 13 2 129 136 kci ART001098296 Sheet Forming Multi-Point Forming Elastomer Forming Two-Dimensional Curved Surface FEM Analysis.