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    內(nèi)直筋散熱器鋼管的冷拔試驗

    EXPERIMENTS ON COLD-DRAWING OF INTERNAL STRAIGHT-RIBBED STEEL PIPES FOR HEAT-EXCHANGER

    • 摘要: 冷拔內(nèi)直筋散熱器鋼管的難點是在拔制過程中凸筋高度充填的同時伴隨著凸筋被拉縮。本文通過試驗,分析了筋底壁厚壓下率（ε％）,壁徑比（δ0/D0）、齒高比（K）及摩擦條件諸因素對凸筋高度充填和凸筋拉縮的影響及它們之間的關(guān)系。

       

      Abstract: The key point of cold-drawing of internal straight-ribbed steel tubes for heat-exchanger lies in the fact that along with the rib height is increased, the rib itself is compressed. Based on the experiments, the article analyses the influence on both increase and compression of rib height by such factors as wall-thickness compression at the bottom of the rib （ε％）, wall thickness to diameter ratio（δ0/D0） , plug groove to rib height ratio （K） and friction conditions etc. and relevant relationship.

       

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