挤压-切削制备槽型换热翅片的工艺及机理

每年全世界产生海量的切屑。目前切屑回收方法主要是回炉重铸或者电解回收，存在能源消耗巨大、环境污染严重、材料损耗大以及回收成本高等缺点。本项目拟通过设计特殊结构刀具，使得待切除的加工余量材料不再形成切屑，而是通过挤压-切削作用直接转化为工业常用的各种槽型换热翅片。通过分析并建立槽型翅片的挤压-切削过程的数学力学模型，探明生成槽型翅片的工艺条件以及成形能力极限，揭示挤压-切削加工机理，最终建立稳定高效的挤压-切削制备槽型翅片工艺。本研究提出一步法实现低价值的切屑在生成过程中直接转变为相对高价值的工业换热翅片，是思维和工艺方法上的创新。课题的立项和完成，在学术上可以丰富和完善槽型翅片的制造理论，丰富切屑回收的思路和方法；在应用方面，既可获得价值较高的工业用换热翅片，又可以避免切屑回收带来的环境损害和能源消耗。因此,本项目研究具有重要的理论和实用价值。

Huge amounts of chips are produced worldwide each year. The chip recycling methods include remelting and electrolyzing, which will cause high energy consumption, seriously environmental pollution, material loss and expensive economical cost. In this project, novel cutting tools are designed to directly change the uncut materials to various industrial grooved fins for heat exchange through extrusion-cutting, rather than becoming the useless metal chips. The mathematical and mechanical model of the extrusion-cutting process for producing the grooved fins will be established and analyzed in this project. The process conditions and forming capacity limitation of this novel process will be studied. The mechanism of extrusion cutting will be revealed, and a stable and highly efficient extrusion-cutting technology for producing grooved fins will be established. This project will not only benefit the manufacturing theory of grooved fins, but also will provide the novel and optional idea for chip recycling. Moreover, the industrial heat exchange fins with high value are also obtained, the environmental damage and energy consumption from the traditional remelting and electrolyzing process can be avoided. Therefore, this project has important theoretical and practical value.