最近我厂承接了校内科研试验用5种规格共1 4件同心球壳的加工任务。这批球壳的加工要求很高,其内外球半径公差±0 0 1mm ,球面同心度公差0 0 2mm ,且壁厚仅2mm。加工难度很大。图　1我们采用了两半球止口连接的结构方案,如两半球分别加工,通过简单易行的工艺措施保证两半球之 Recently I plant to undertake the school scientific research test with a total of 14 kinds of specifications of the concentric spherical shell processing tasks. This batch of spherical shell processing requirements are high, the radius of the inner and outer ball tolerance ± 0 0 1mm, spherical concentricity tolerance 0 0 2mm, and the wall thickness of only 2mm. Processing is very difficult. Figure 1 We use the structure of the two halves of the mouth connection, such as the two hemispheres were processed by simple and easy process to ensure that the two hemispheres