The Design and Development of a Hydrostatic Extrusion Machine with Control System
| Autor: | Hungpo Hsieh, 謝弘柏 |
|---|---|
| Rok vydání: | 1999 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 87 Hydrostatic extrusion is an extrusion process under which a high hydrostatic pressure is directly used to push the material through extrusion die. High extrusion ratio and high quality for products are two main advantages for this process. In general, very high extrusion pressure(may reach 1.5 GPa)are usually required in a extrusion process for certain high quality products such as high temperature superconducting wires. Because this kind of ultrahigh hydrostatic extrusion apparatus is expansive and difficult to manufacture, there exists almost no experiences in designing and manufacturing this apparatus in Taiwan. Recently, We had finished the design and manufacture of ultrahigh hydrostatic extruder, high pressure plunger and high pressure seal of the hydrostatic extrusion apparatus. Preliminary extrusion tests had also been finished successfully. During the extrusion processes, we found that a system of backpressure control is essential to control extrusion speed and extrusion pressure correctly for a better quality of products. Also, computers are required in coordinating main pressure and backpressure. We propose to complete the whole control system with the backpressure control system in one year and combine it with our hydrostatic extrusion apparatus for a practical ultrahigh hydrostatic extrusion machine suitable for industrial purpose |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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