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多年来,航空发动机的性能及设计结构在不断改进、不断提高。随之而来,发动机上机匣的材料、结构也发生了很大变化,越来越多的难加工材料和复合材料被采用,机匣设计结构也越来越先进、精巧,单一机匣所具有的功能也越来越多。因此机匣件的制造难度也越来越大,前轴承机匣是一个结构复杂、技术含量高、加工难度大的精密薄壁焊接整体机匣,尺寸公差与技术条件要求严格,属于整体焊接机匣类零件中最难加工的典型零件,其车削加工尺寸很难一次合格。本文着重介绍前轴承机匣车削型面的加工技术改进过程,利用合金刀具及改变各型面先后加工顺序来保证尺寸和精度。对采用的刀具和切削参数的优化进行了详细的分析,并对加工中所遇到的问题和所采用的对策进行较为详细的阐述。
Over the years, the performance and design structure of aeroengines are constantly improving and constantly improving. As a result, the engine casing material, the structure has undergone great changes, more and more difficult to process materials and composite materials are used, the casing design structure is also more advanced, sophisticated, single receiver Has more and more features. Therefore, the manufacture of the machine case is also more and more difficult. The front bearing case is a precision thin-wall welded machine case with complicated structure, high technical content and high processing difficulty. The dimensional tolerances and the technical conditions are very strict and belong to the whole welding machine The most difficult part of the typical parts machined parts, the turning size is difficult to pass a qualified. This article focuses on the improvement process of the machined surface of the front bearing casing, and uses the alloy tool and the sequence of processing the various surfaces to ensure the size and accuracy. The optimization of cutting tools and cutting parameters are analyzed in detail, and the problems encountered in machining and the countermeasures adopted are described in detail.