【作者】 李爽；

【导师】 林彬； 于思远；

【作者基本信息】 天津大学 ， 机械制造及其自动化， 2004， 硕士

【摘要】 铝合金薄壁长筒在现代机器设备及产品中有着广泛的应用，由于应用场合的特殊性，其精度要求非常高。常规的加工方法将车削与镗削分开进行，工艺过程复杂，生产效率低，精度稳定性差，加工成本高。针对该类零件，研究开发可将外圆车削与内孔镗削同时进行加工的切削新工艺，并在此基础上研制成功TD6163薄壁长筒专用数控机床。为适应批量生产的需求，进一步提高薄壁长筒类零件的生产效率，本文在双刀切削加工工艺和TD6163机床研制成功的基础上，成功研制薄壁长筒类精密零件三坐标专用数控机床XL1003。并进行了生产工艺实验，获得了适用于生产的切削用量与刀具几何参数，使XL1003专用机床的生产效率比TD6163机床提高了50％。薄壁长筒零件属于难加工零件，影响其加工精度和表面质量的因素很多，其中最主要的因素就是工件的振动问题。本文针对双刀复合切削工艺的特点提出了若干消振措施，并在论证了其可行性的基础上，研制成功以前导向气动消振装置和顶料装置为主体的消振系统。经实验证实效果良好。通过实验模态法对XL1003专用机床中对零件加工精度影响较大的主要部件进行了动态性能实验。掌握其动态性能为今后新机床的设计及响应预测等提供了可靠的依据。采用Pro/E软件对机床主要切削系统和消振系统进行建模，并用3DS MAX动画软件对机床切削过程进行几何仿真，满足人们对其外观、功能和行为的需求。更多还原

【Abstract】 Today, the alloy tube that has thin wall, large ratio of length in axial direction to radius dimension has been used in wide-ranging. And it required extraordinary precision and quality in some special field. However the traditional machining method, which machines the workpiece by turning tool and boring cutter respectively, has lots of disadvantages, such as complex technical processes, low production efficiency and precision stability and high costs. For the purpose of improving the productivity, a new machining method named double-tool cutting, which machines the workpiece by turning tool and boring cutter at the same time, and a type CNC machine tool TD6163 which implements double-tool cutting has been developed.To meet the needs of large production, a new type CNC machine tool which is based on the double-tool cutting technique and the TD6163 machine tool is developed in this paper. The cutting parameters are acquired by series of experiment. And compared with the TD6163 machine tool, the production efficiency of the XL1003 machine tool is improved by 50%.Some problems occurred to the double-tool cutting technics process, such as deforms caused by the vibration of workpiece. A series of optimized techniques to improve the rigidity and decrease the cutting vibration of the workpiece during machining are proposed. A vibration-eliminate device and a special finial device are invented to complete these optimized techniques. Methods to solve these problems are also tested by cutting experiments.Dynamic characteristic analysis of the main part of the machine tool though experimental mode method is practised.The model of cutting system and the vibration-eliminate system are founded by use of the software Pro/E. And the simulation of cutting process is made by use of the software 3DS MAX in this paper.更多还原