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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Design and Manufacturing of Dieless Drawing Prototype Machine

Kuo, Tsung-Yu 31 August 2011 (has links)
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.

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