汽车涡轮增压叶轮的加工仿真与研究

发布时间：2018-06-28 02:43

本文选题：叶轮 + 五轴联动加工　；参考：《辽宁科技大学》2016年硕士论文

【摘要】：在机械装配业中,叶轮零件是一具有代表性的重要零件,其结构造型比较复杂,具有明显的形状特征。叶轮的造型过程往往涉及流体力学,空气动力学等多门学科,叶轮在加工时采用的加工方法、工艺规划、加工精度和加工质量对叶轮最终的性能会有很大程度的影响。叶轮在工业上的应用十分广泛,例如能源动力、航空航天、船舶、冶金等。随着叶轮加工技术的不断发展,利用五轴联动数控技术加工叶轮得到越来越多的应用,并日渐走向成熟。本文主要研究的是提高叶轮加工的效率和质量,结合实际生产条件和企业要求,对叶轮的五轴联动数控加工技术进行研究。本文首先研究NURBS原理并对叶轮结构进行分析,然后将已处理分片截取的点云导入UG/CAM软件中利用逆向工程技术对叶片模型重构进而建立整体叶轮模型。其次在高速铣削技术和五轴联动数控技术的基础上制定合理的加工工艺,并且分析在叶轮加工中出现的难点和技术要求,制定合理的工艺阶段的规划,例如毛坯、刀具和夹具的选择,刀轴的控制,切削余量的设定等,然后在保证最短加工时间和质量的目标下,利用数学优化法建立数学模型,并在MATLAB中进行编程计算得到最优参数,达到对切削参数优化的目的。根据所得优化参数在UG/CAM中进行叶轮加工编程得到刀轨文件。针对使用的DMU80 mono BLOCK五轴联动机床,分析机床结构,基于UG/Post构造该机床专用的后处理器,然后将所得的刀轨文件通过该后置处理转化为所需要的NC代码。最后基于VERICUT仿真平台,构建DMU80 monoBLOCK五轴联动机床模型,在VERICUT中进行仿真模拟,来检验刀具轨迹的正确性和加工的经济性。
[Abstract]:In the mechanical assembly industry, impeller part is a representative important part, its structure shape is quite complex, has the obvious shape characteristic. The modeling process of impeller often involves many subjects such as hydrodynamics, aerodynamics and so on. The processing methods, process planning, machining precision and machining quality of impeller will have a great influence on the final performance of impeller. Impellers are widely used in industry, such as energy power, aerospace, shipping, metallurgy and so on. With the development of impeller machining technology, five-axis NC machining technology has been applied more and more, and gradually becoming mature. In this paper, the main research is to improve the efficiency and quality of impeller machining, combined with the actual production conditions and enterprise requirements, the five-axis NC machining technology of impeller is studied. In this paper, the Nurbs principle is first studied and the impeller structure is analyzed, then the point cloud which has been processed and cut off is imported into the UG / CAM software and the blade model is reconstructed by reverse engineering technology and the integral impeller model is established. Secondly, on the basis of high-speed milling technology and five-axis linkage NC technology, the reasonable processing technology is established, and the difficulties and technical requirements in the processing of impeller are analyzed, and the reasonable process planning, such as blank, is worked out. The selection of cutting tool and fixture, the control of cutter axis, the setting of cutting margin, etc. Then, under the goal of ensuring the shortest processing time and quality, the mathematical model is established by using mathematical optimization method, and the optimal parameters are obtained by programming in MATLAB. The aim of optimizing cutting parameters is achieved. According to the optimized parameters, the cutter track file is obtained by programming the impeller in UG / CAM. Aiming at the DMU80 mono block five-axis linkage machine tool, the structure of the machine tool is analyzed, and the special post processor is constructed based on UG / Post. Then the tool track file is transformed into the needed NC code through the post processing. Finally, a DMU80 monoBLOCK five-axis machine tool model is constructed based on VerICUT simulation platform, and simulated in Vericut to verify the correctness of tool path and the economy of machining.
【学位授予单位】：辽宁科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U464.135

【相似文献】