环件径轴向轧制毛坯尺寸设计方法

Design Method of Blank Sizes for Radial-axial Ring Rolling

毛坯尺寸设计是环件径轴向轧制过程优化设计的前提和基础,合理的毛坯尺寸设计,对于成功建立环件径轴向轧制过程、通过包括毛坯在内的过程优化设计以获得精确的环件尺寸和良好性能,具有十分重要的意义。为此,提出一种基于轧比和径轴向变形量分配比的矩形截面环件径轴向轧制毛坯尺寸设计方法,给出毛坯尺寸的计算公式与确定流程,阐明该毛坯尺寸设计方法的特点及应用范围。该方法基于体积不变原理,针对同一环件的轧制,可以设计不同轧比和变形量分配比的多个环坯,为研究不同环坯下的环件径轴向轧制变形行为、工艺规律以及包括毛坯在内的工艺过程优化设计、成形成性一体化调控提供了重要的方法和基础。

The rational design of blank sizes is the foundation and premise for the optimum design of radial-axial ring rolling（RARR） process,and has great significance for successfully establishing the RARR process and for obtaining ring parts with precise dimensions and favourable microstructure and performance by process optimization including blank optimum design.Aiming at the RARR process with rectangular ring blank,a design method of blank sizes based on rolling ratio and the ratio of deformations in the radial and axial directions of the blank is presented,the formulas and procedures for the calculation of the blank sizes are given,and the features and the applied range of the presented method are discussed.The method can be used to design multiple blanks with different rolling ratio and the ratio of deformations in the radial and axial directions of the blank for the same desired ring part based on the volume conservation principle.The results of this work provide foundation and method for the investigations on the deformation behaviour,process laws,process optimization including blank optimum design,and integrated regulation on the shape and performance of the ring products.