核岛AP1000蒸发器水室封头是当今世界应用最广、制造难度最大的第三代核电核心部件。重型铣削加工过程中的振动冲击与颤振，严重影响和制约了加工质量和生产效率。为研究水室封头重型铣削刀盘与主轴系统的固有振动特性，首先分析重型铣削加工振动产生特点，建立了专用机床(TK6920型数控落地镗铣床)与刀盘(Φ200R8圆弧刀片刀盘)的三维模型，进行有限元模态仿真分析；进而在生产现场进行模态实验，采集和处理数据并进行实验模态分析；通过对比实验数据与仿真模态分析结果，最后总结出重型铣削机床刀盘与主轴系统的固有振动特性，为研究重型铣削过程中振动特性奠定基础。
Abstract
Nuclear island AP1000 evaporator water chamber head is the core components of the third-generation nuclear, which is the world's most widely-used and has largest difficulty of manufacturing. Vibration and flutter in heavy milling manufacturing process seriously affect and restrict the machining quality and production efficiency. In order to research the vibration modal characteristics of cutter and the main shaft system in water chamber head milling process, we first analyze characteristics of vibration in heavy milling process, through establishing three-dimensional model of machine tools (TK6920 CNC floor-type boring and milling machine) and cutter (Φ200R8 arc blade cutter), carry out finite element modal simulation analysis; then conduct mode experiment in production field, collect and process data, and carry out experimental modal analysis; by comparing the results of experimental and modal analysis, finally summarize the natural vibration characteristics of cutter and the spindle system of heavy milling machine, which lays the foundation for further study of vibration characteristics in heavy milling process.
关键词
振动模态 /
模态分析 /
重型铣削 /
水室封头
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Key words
vibration modal /
modal analysis /
heavy milling /
water chamber head
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