摘要
通过对第三代强化传热元件三维整体翅片的滚压-犁切-挤压复合法加工,分析了整体式三维翅片的成形特征、条件和成翅机理.当滚压深度和犁切-挤压深度均为0.20mm、转速为50r/min、进给量为0.16mm/r时,在外径16mm、壁厚1.5mm的紫铜管外表面得到最优的翅高0.25mm的三维翅片.进一步研究分析表明,滚压深度和转速、进给量和犁切-挤压深度之间存在着相互匹配的关系.在不同加工参数下得到了两种不同的结构:一种为V型槽与U型槽混合结构,另一种为单一V型槽结构;当滚压加工和犁切-挤压加工的结构都呈单一V型槽时实现了整体式三维外翅片的滚压-犁切-挤压一次成形.
A kind of third-generation enhanced heat-transfer component,namely 3D integral fin,was machined by the rolling-ploughing-extrusion composite machining,and the corresponding formation characteristics,machining conditions and formation mechanism were analyzed.Experimental results show that,at a rolling depth and a plou-ghing-extrusion（P-E） depth of both 0.20mm,a rotational speed of 50r/min and a feed rate of 0.16mm/r,optimal 3D fins with the height of 0.25mm can be machined on the outer wall of the red copper tube which is 16 mm in diameter and 1.5 mm in wall thickness. Analytical results indicate that there is a matching relationship not only between the rolling depth and the rotational speed but also between the feed rate and the P-E depth, that two different fin structures can be obtained in different machining conditions. One is the composition of V-shaped and U-shaped grooves, and the other is of only V-shaped grooves, and that 3D integral fins can be machined by the rolling-ploughing-extrusion composite machining when single V-shaped grooves are formed by both rolling and P-E processing.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第9期82-87,共6页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50436010
50675070
50605023)
广东省自然科学基金资助项目(07118064)
关键词
外翅片管
滚压
犁切-挤压
强化传热
功能结构
outside fin tube
rolling
ploughing-extrusion
enhanced heat transfer
functional structure
作者简介
向建化（1978-），男，博士生，主要从事微制造理论及数字化技术、表面功能结构制造研究．E—mail：furongbridge@yahoo．com.cn
