摘要本以船用柴油机机身零件的铣削加工为研究对象，对“机床-刀具-工件”系统进行了锤击实验，通过锤击实验获得了相关的模态文件，再利用动态性能测试系统中的传函分析与模态辨识功能得到机身高速铣削参数优化所需要的模态参数。得到模态参数进行机身高速铣削参数优化，分为三个模块，铣削颤振稳定域仿真、铣削时域仿真和仿真数据表格输出。首先进行铣削颤振稳定域仿真得到以主轴转速为横坐标、以轴向切深为纵坐标的铣削颤振稳定域图，在曲线图中单击鼠标左键选取满足机床、刀具、工件性能的点进行时域仿真，通过时域仿真得到柴油机机身零件铣削过程中的功率、扭矩等信息，通过仿真计算，切削参数优化结果由仿真数据表格输出。选取合适的切削参数组合进行deform-3D仿真，另外把厂方提供的一组机身高速铣削参数的数据进行deform仿真。通过仿真实验我们得到仿真过程中的铣削力、铣削温度等相关数据，通过分析对比着两组参数仿真结果，我们可以验证机身高速铣削参数优化的结果满足机床、刀具、工件的性能而且提高了切削效率，故优化的切削参数合理。 50609

毕业论文关键词： 船用柴油机机身；高速铣削加工；切削参数优化；deform仿真 

 Abstract In this paper, I chose the milling of fuselage of marine diesel engine as the object of my reasearch. First ,I did an experiment on the "machine - tool - work piece" system .It was the so called “hammering experiment”. Through the hammering experiment, we obtained some modal parameters files about the" machine - tool – work piece system . Then use the ability of dynamic performance test system’s transfer function analysis and modal recognition  to achieve the modal parameters files for fuselage’s high-speed milling parameter optimization . Second we use the software to optimize the parameter of milling at high speed. The parameter optimization is pided into three modules, those are milling chatter stability domain simulation, milling time domain simulation and simulation output data tables. First, for milling chatter stability domain simulation to get to the milling chatter stability field map ,whose abscissa was the spindle rotating speed and the vertical axis was the axial depth of cut. click on the left mouse button on the graph to select the point under the condition of machine’s, tool’s, work piece’s performance to conduct time domain simulation .Through time-domain simulation we get the optimized parameters and other information during the milling of fuselage .Through time-domain simulation and chatter stability domain simulation, the results of cutting parameters optimization were output   from the simulation output data tables. Last ,Select the appropriate group of cutting speed, cutting depth and feed amount from the optimized parameters and check the data from machinery book for another group to simulate in deform-3D .We can get the results of  milling temperature, tool wear and other relevant data of both groups in the process of deform-3D milling simulation. Then made a contrast with the results of these two groups, through the analysis of these data we can verify the parameter optimization results of fuselage’s high speed milling met the performance of machine, tool and work piece. At the same time ,the production efficiency was promoted .therefore the results of optimize the cutting parameters are reasonable.

Keywords: marine diesel engine fuselage; high-Speed Milling; machining parameter optimization; modal testing; chatter stability domain simulation; time domain simulation; deform-3D simulation 

目  录 1

第一章  绪 论 3

1.1 课题的研究背景