减小大型火箭外壳板滚 弯直线度误差的途径

如何更有效地减小大型火箭外壳板（简称箭壳板）滚弯直线度误差，至今仍是箭壳板制造工艺人员所关注的问题。在对最不利实际工况下三轴辊弯板机中心辊进给量沿自身轴线分布规律作系统的分析、计算和研究的基础上，作者推导出一项箭壳板滚弯直线度误差不等式。对该不等式所显示的箭壳板滚弯直线度误差与轧辊主要几何参数之关系进行研究及比较后，提出了改造三辊机是减小箭壳板滚弯直线度误差的重要途径。一系列研究表明，按该推荐方法改进三辊机可使箭壳板直线度误差大幅度下降。

MEASURES FOR REDUCING LARGE ROCKET HULL STRAIGHTNESS ERROR IN BENDER FORMING

P to now, how to reduce more effectively the large rocket hull straightness error has been an interesting problem for technicians of manufacturing rocket hulls. On the basis of systematical analysis, calculation and investigation on the distribution law of the center roller feeding value over the axis of itself under the most disadvantageous practical operation conditions, an inequality for calculating the straightness error of the large rocket bull formed by the bender with three rollers is derived by the author. Relationships between the straightness error of the large rocket hull and geometrical parameters of three rollers in the bender are shown by the inequality. According to the results of studying and comparing the relationships, the author indicates that improving the bender with three rollers is the important way for reducing the straightness error of a large rocket hull. It has been proved by a series of researches that improving the bender with three rollers by use of the method recommended in this paper can make the large rocket hull straightness error reduced considerably.