In this study, a dieless drawing prototype machine has been developed for tube or wire drawing forming. This dieless drawing machine used a high-frequency heating apparatus as the heating source and used stainless steel SUS304 tube as specimens. A series of experiments with different relative speed between heating source and drawing grip were conducted. The moving power is transformed by two servo-motor connecting with screws. Infrared thermoscope and cooling device are setting on the high-frequency heating apparatus to control the temperature of specimen. The forming stability between different relative speed ratio, drawing speed and heating temperature has been discussed. The maximum stable reduction of area obtained can reach over 40 percent , and the drawing speed can be reach to 0.8mm/s. FE analysis was also conducted to analyz the formability of the tube. Then the validity of the analytical model was verified by comparing the uniformity and similarity between FE analysis and experiment value. A series of FE simulation results were used to understand the distribution of true stress and temperature in tube dieless drawing process, tryingand to improve the drawing speed and the reduction of area.

Submitted by Livia Mello (liviacmello@yahoo.com.br) on 2016-10-11T14:05:01Z No. of bitstreams: 1 DissGIF.pdf: 2443815 bytes, checksum: 100e28390f0b9b6780e2b2ce9aedfe39 (MD5) / Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-10-21T12:14:37Z (GMT) No. of bitstreams: 1 DissGIF.pdf: 2443815 bytes, checksum: 100e28390f0b9b6780e2b2ce9aedfe39 (MD5) / Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-10-21T12:14:43Z (GMT) No. of bitstreams: 1 DissGIF.pdf: 2443815 bytes, checksum: 100e28390f0b9b6780e2b2ce9aedfe39 (MD5) / Made available in DSpace on 2016-10-21T12:14:51Z (GMT). No. of bitstreams: 1 DissGIF.pdf: 2443815 bytes, checksum: 100e28390f0b9b6780e2b2ce9aedfe39 (MD5) Previous issue date: 2016-09-17 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / This paper presents an educational sequence for the Geometry classes, which explores the concept of similarity, focusing on the variation of the similarity ratio between linear measurement, areas measurements and volume of some polyhedrons. The problematic situation in this case involves a comparison between the prices of different popcorn packaging sizes in Bauru ́s movie theaters and its area. / Este trabalho apresenta uma sequência didática para aulas de Geometria abordando o conceito de semelhança com foco na variação da razão de semelhança entre medidas lineares e medidas de áreas e de volumes de alguns poliedros, tendo como situação problema a comparação de preços de diversos tamanhos de embalagens de pipocas vendidas em salas de cinema da região de Bauru.