异形截面管双轴柔性滚弯技术理论分析与试验研究

双轴柔性滚弯技术适于加工管状零件,对于比强度高的材料具有很好的成形精度,是一种先进的制造技术,目前已成功地应用在开缝衬套和导弹舱壳主体圆筒的制造中。在圆截面管双轴柔性滚弯成形研究的基础上,将该技术扩展运用到板料异形截面管滚弯成形,首次建立了异形截面管柔性滚弯自动控制模型,并在自行研制的异形截面管柔性滚弯数控原型机床上进行了试验验证,为该技术实现数字化控制奠定了理论基础。

THEORETICAL ANALYSIS AND EXPERIMENTAL STUDY ON TWO-AXLE BENDING WITH ELASTIC ROLLER FOR FORMING NON-CIRCULAR CROSS-SECTION PARTS

Two-axle bending technique with elastic roller (TABTER) is a kind of advanced manufacturing method for bending tubular parts, specially suiting for the difficult-to-work metal materials with high specific strength, and it can obtain a finer forming accuracy. Now the technique is applied to bend split-sleeve and missile body cylinder successfully. Based on the studies of TABTER for circular cross-section parts (TABTER-C), the TABTER for non-circular cross-section parts (TABTER-Non-C) is studied. The autocontrol model of TABTER-Non-C iss built for the first time, and the non-circular cross-section tubular parts of elliptical cross-section are manufactured to verify the model using the sheet-bending NC prototype machine with elastic roller made by ourselves. The experimental results prove the correction of the theoretical analysis. All the works lay a solid foundation for the numerical application of the technology.