The dissertation combines theoretical analysis and numerical simulation with experience , studied the rib - tube which manufactured by means of cutting - extrusing composite technics . firstly , the development and general situation of numerical heat transfer and fem are summarized , the mathematical and fem models of rib - tube with large aspect ratio are given , and the relative problems are disposed 本文将理论分析、数值计算和实验研究三种方法相结合，以采用切削?挤压复合成形新工艺加工的翅片管为研究对象，对其换热过程进行数值模拟并对其结构进行优化设计。
Various successive partial plastic forming methods for processing groove , including thread rolling , cross rolling and skew rolling , splitting , rolling of spline shaft , split rolling , open - die extrusion of spline shaft / gear , extrusion of internal screwed tooth socket parts with large helical pitch , integral cold forging for slot commutator , extrusion - ploughing for outside fin tube , drawing of tube with spiral internal / external ribs etc . have been introduced briefly 摘要介绍了用于加工槽的各种连续局部塑性成形方法，包括螺纹轧制、横轧与斜轧、分劈、花键轴滚轧、劈分轧制、花键轴齿轮开模挤压、花键套挤压、槽型换向器整体冷锻、外翅片管挤压一犁削、内外螺纹管拉拔等。
