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为制造现代技术中广泛使用的零件—紊流器、螺旋推进器、钻管、热交换器等,均需使用内外带螺旋筋的管子。生产这类零件的一种有发展前途的方法是热挤压。目前尚无可保证按给定几何形状无裂纹和断裂地挤压螺旋筋的模具计算。本文的目的是填补这空白。在挤压管子时,外螺旋筋是由坯料金属流入凹模的螺旋槽中时制成(图1,a)。圆周方向上金属是依靠槽内流动速度的非均匀性进行运动。槽具有与挤压
For the manufacture of parts widely used in modern technology - turbulators, augers, drill pipe, heat exchanger, etc., are required to use the inside and outside with spiral pipe. A promising method of producing such parts is hot extrusion. There are currently no molds available to ensure that a spiral rib is extruded without breaking and breaking for a given geometry. The purpose of this article is to fill this gap. When the tube is extruded, the outer spiral reinforcement is made from the billet metal flowing into the spiral groove of the die (Fig. 1, a). The circumferential direction of the metal is based on the flow velocity within the non-uniform movement. Slotted and extruded