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。 Sheet metal progressive forming process is a flexible forming process, which is ideal for processing small batch, multi-species and complex shapes of sheet metal products. Taking the medical prosthesis as the experimental object, the progressive forming process was completed on the progressive forming special machine by using the positive and negative forming processes respectively. Aiming at the problem that the gap between the tool head and the support body is unreasonable, the model of the support body is generated by the integral biasing method based on the part model, which solves the problem of the surface quality of the workpiece. The thickness of deformation zone and springback deformation of formed part were measured, and the data were analyzed. The experimental results show that the material thickness change follows the sine law. The thickness error and the springback of the negative forming parts are larger than those of the positive forming parts. The main factors influencing the thickness of the parts and the springback are analyzed preliminarily .