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作者研究的通称为‘Raflo’的方法是把锭坯从一端通过一个‘环缝’(orifice)放射状地向外挤压,该‘环缝’由两个彼此接近的平行平面构成。挤压金属首先形成一个园盘形状,随着挤压进行,该‘园盘’的直径不断增大。当挤压沿径向进行到要求的管材直径时,其弯转90°,挤压沿轴向继续进行而形成管材。本文叙及了概况、本方法的由来,并讨论了基本压力分析、表面质量、同心度及尺寸。叙述并插图说明了原始实验情况,由这些原始实验得出的对生产设备的一些设想于文末作了简要说明。
The method studied by the author, commonly known as ’Raflo’, is to radially extrude the ingot from one end through an ’orifix’ consisting of two parallel planes that are close to each other. The extruded metal first forms a disk shape, the diameter of which increases as the extrusion progresses. When the extrusion is done radially to the required pipe diameter, it is bent 90 ° and the extrusion continues in the axial direction to form the pipe. This article describes the general situation, the origin of this method, and discusses the basic pressure analysis, surface quality, concentricity and size. The original experiment is described and illustrated, and some of the assumptions made about the production equipment derived from these original experiments are briefly described.