回转球面精密磨削系统及其误差模型

Spherical Precision Grinding System and Error Modeling

耐高温、耐高压、耐磨损的大型球阀是煤液化、核电等重大工程的关键部件,其阀芯回转球面的形状精度都有很高的要求。在研究回转球面精密磨削原理和机床结构的基础上,提出一种通过球体形状误差的测量来估计系统调整误差的方法,并建立了数学模型。实验结果证明,基于本模型精密调整机床后能显著提高工件的形状精度。

Big- sized ball valves, which are temperature- , pressure - and wear- resistant, are key components used in heavy industries like coal liquefaction engineering and nuclear power engineering. Shape accuracy of the spool spherical surface is highly demanding. Therefore, a novel method, which uses the measuring result of workpiece shape error to estimate the system adjustment error, was proposed. Mathematical models were also built. Experimental results indicate that the shape accuracy of the workpiece can be notably improved after the machine is adjusted based on the model.