【摘要】 冷拔内直筋散热器钢管的难点是在拔制过程中凸筋高度充填的同时伴随着凸筋被拉缩。本文通过试验,分析了筋底壁厚压下率（ε％）,壁径比（δ₀/D₀）、齿高比（K）及摩擦条件诸因素对凸筋高度充填和凸筋拉缩的影响及它们之间的关系。更多还原

【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.更多还原