微型微通道管的连续挤压成形工艺  

Continuous extrusion forming process of micro-channel tube

作　　者：杜鹏[1] 胡国平[1] 郭胜利[1] 李德富[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《锻压技术》2016年第12期77-81,共5页Forging & Stamping Technology

摘　　要：微型微通道管产品具有孔道数量多、孔道尺寸小、壁厚薄、尺寸精度要求高等特点,制备加工难度很大。采用连续挤压制备方法,通过采取双槽挤压方式、增加金属导流板等措施,对模具结构与加工方法、挤压工艺进行优化设计,明显改善了微型微通道管产品挤压成形时金属在产品宽度方向的流动均匀性、孔道部位的有效填充及焊合质量,解决了挤压过程中模具模芯强度不足导致的尺寸超差与失效问题和溢料过多导致产品无法挤出等问题。最终成功试制了厚度为2.2 mm、宽度为45 mm的52孔微型微通道管产品,产品外形尺寸和组织结构均满足设计要求。Micro-channel tube has characteristics of large quantity in channel number,small channel size,thin wall thickness and high dimensional accuracy etc.,and it is very difficult to process. Then,the flow uniformity along the width direction,the filling and welding quality at the channel area in the continuous extrusion of micro-channel tube products were improved obviously by continuous extrusion method of double extrusion,adding metal guide plate,optimizing die structure,processing method and extrusion process. Moreover,it was solved the problems of dimensional tolerance and invalid due to insufficient strength of die core,failure of squeezing due to excessive overflow in the extrusion process. At last,the micro-channel tubes with the thickness of 2. 2 mm,the width of 45 mm,and52-hole miniature were carried out,and the design requirements of size and structure were sufficiently met.

关 键 词：微型微通道管 连续挤压 腔体 导流板 分流组合模 

分 类 号：TG376[金属学及工艺—金属压力加工]