(華南理工大學(xué) 機(jī)電工程系， 廣州 510640)
摘 要: 提出了一種新的整體翅片管的機(jī)械加工方法，即劈切-擠壓加工。實(shí)驗(yàn)觀察發(fā)現(xiàn)，翅片的形成包括切入、擠壓和成形3個(gè)階段。實(shí)驗(yàn)結(jié)果表明，影響翅片形成的主要因素有刀具幾何參數(shù)、擠壓深度、進(jìn)給量和劈切-擠壓速度；對(duì)某一刀具，在選定擠壓速度時(shí)，一定的擠壓深度對(duì)應(yīng)一個(gè)極限進(jìn)給量，一定的進(jìn)給量對(duì)應(yīng)一個(gè)極限擠壓深度。選擇合理的參數(shù)可保證翅片加工的連續(xù)性和獲得接近最佳形狀的翅片。劈切擠壓加工在普通車床上進(jìn)行，設(shè)備簡(jiǎn)單易操作，翅片一次成形，材料利用率高，是一種能降低加工成本、提高生產(chǎn)率的加工方式。
關(guān)鍵字: 整體翅片管； 劈切 擠壓加工; 擠壓比
making integral-fin tubes
（Department of Mechanotronic Engineering， South China University of Technology，
Guangzhou 510640, P.R.China）
Abstract:A new method of machining integral-fin tubes (IFT), chopping-extrusion technique, was presented. From the experimental observation, it was revealed that the processing of forming a unity of fins can be divided into three stages: chopping， extrusion and forming. It was shown by experimental results that there are four factors playing chief roles on processing of fin such as geometric parameters of cutting tool， depth of extrusion， feed and speed of chopping-extrusion. For a certain cutting tool， a limit feed was brought up with a definite extrusion depth under given chopping-extrusion speed. Only given proper parameters could continuous process of fin forming be carried out and the optimal shape of fins be obtained. Production costs will be reduced and productivity increased by employing this machining method because of easy performing and direct forming of fins.
Key words: integralfintube; chopping-extrusion; ratio of extrusion
