基于渐进成形的修复体加工实验

发布时间：2018-07-08 18:28

本文选题：渐进成形 + 支撑体　；参考：《塑性工程学报》2015年06期

【摘要】：板料数控渐进成形工艺是一种柔性成形工艺,这种工艺非常适合加工小批量、多品种和形状复杂的板料产品。以医疗修复体为实验对象,分别采用正成形、负成形工艺在渐进成形专用机床上完成渐进成形加工。针对工具头与支撑体间隙不合理导致零件表面产生挤压痕迹的问题,提出一种基于零件模型的整体偏置方法生成支撑体模型,很好的解决了加工件表面的质量问题。对成形零件变形区厚度及回弹变形进行测量,并对所得数据进行分析。试验结果表明,数控渐进成形中材料厚度变化遵循正弦定律;负成形加工件的厚度误差、回弹量均比有支撑的正成形大,并对影响零件厚度、回弹的主要因素进行了初步分析。
[Abstract]:NC incremental forming of sheet metal is a flexible forming process, which is very suitable for small batch, multi-variety and complicated sheet metal products. Taking the medical prosthesis as the experimental object, positive forming and negative forming were used to complete the incremental forming process on the special machine tool for incremental forming. In order to solve the problem that the gap between tool head and support leads to extrusion trace on the surface of parts, an integral bias method based on the part model is proposed to generate the support model, which solves the quality problem of the workpiece surface. The thickness of deformation zone and springback deformation of forming parts are measured and the data obtained are analyzed. The experimental results show that the thickness variation of material follows the sine law in NC progressive forming, the thickness error and springback of negative forming parts are larger than that of supported positive forming, and the main factors affecting the thickness and springback of parts are analyzed.
【作者单位】：南京航空航天大学机电学院;南京工程学院材料工程学院;
【基金】：江苏省先进结构材料与应用技术重点实验室开放基金资助项目(ASMA201410) 南京工程学院创新基金资助项目(CKJB201304) 江苏省大学生实践创新资助项目(201511276041Y)
【分类号】：TG306

【参考文献】