Narrow space combination machining technology for thin-walled shell structure
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摘要: 针对直角铣头的结构特点，通过对直角铣头的安装方式及刀尖点补偿算法等研究，采用了刀具参考点偏置补偿算法、控制器双向刀长补偿算法，突破了空间狭小的复杂结构进行加工时易出现主轴干涉和运动轴超程的共性瓶颈问题；同时对精测辅助离线加工技术进行研究，详细论述了精测辅助离线加工技术的原理、误差分析、基准转换，解决了精测辅助离线加工的坐标系转换难题。解决了薄壁壳体结构狭小空间组合加工难题，为促进我国航天器制造水平的进一步提升奠定良好的基础。Abstract: In this paper, according to the characteristics of the structure of right-angle milling head through the installation of right-angle milling head and the tip point compensation algorithm research, such as reference point by the cutting tool offset compensation method, controllers, two-way blade length compensation method, break through the narrow space of the complex structure is easy to appear when processing spindle interference and movement axis overtravel common bottlenecks; At the same time, the principle, error analysis and datum conversion of precision assisted off-line machining technology are discussed in detail to solve the coordinate system conversion problem of precision assisted off-line machining. The problem of narrow space combination machining of thin-walled shell structure is solved, which lays a good foundation for promoting the further improvement of spacecraft manufacturing level in China.
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表 1 返回器侧壁金属壳体俯仰发动机舱体验收尺寸实测数据表
mm 测量项目 要求值 实测值 俯仰发动机舱尺寸1 66.8±0.05 66.84 俯仰发动机舱尺寸2 46.75 46.69 俯仰发动机舱尺寸3 ϕ32 
ϕ32.02 俯仰发动机舱尺寸4（ϕ32孔位置度） ϕ5 ϕ1.92 俯仰发动机舱尺寸5 ϕ48±0.05 ϕ48 
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[1] 郑新胜, 石云. 直角铣头的简便用法[J]. 金属加工: 冷加工, 2013(14): 71-74. [2] 西门子股份公司. SINUMERIK840D/840Di/810D 高级编程手册[M]. 2004. -
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