共查询到19条相似文献,搜索用时 125 毫秒
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叶茂赵巍刘鹏鑫连泰湖 《制造技术与机床》2022,(12):145-152
针对整体叶盘结构复杂测量困难的特点,研发了一种基于OpenGL的虚拟仿真检测系统。该仿真系统建立了三坐标测量机和整体叶盘的三维实体模型,对整体叶盘测量路径进行规划,在均匀分布的基础上,提出了一种基于曲率的自适应采样方法,减少了测量点数目,实现了截面线上采样点自适应分布,并确定了每个测量区域的测头位姿。完成了整体叶盘的测量规划以及测量过程的仿真。 相似文献
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整体叶盘机器人自动化抛光技术 总被引:1,自引:0,他引:1
根据整体叶盘结构,在对整体叶盘造型方法分析的基础上,对应用机器人抛光过程中的刀轨生成和干涉检测进行了研究,提出了适合于整体叶盘机器人抛光的刀轨生成算法,并对机器人控制数据的确定进行了分析.该技术对于提高抛光加工质量和效率具有重大的实际意义. 相似文献
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整体叶盘的叶片分离技术是实现整体叶盘的叶片损伤修复和叶片试验的关键加工技术。计算并选定整体叶盘倾斜角度,设计专用叶片分离工装,计算叶片分离的刀位点,根据叶片的掠扭程度规划加工路径,用UGNX软件进行几何仿真,并在某型整体叶盘上进行了加工实验。结果表明,该叶片分离技术能较好地满足加工质量要求和有效避免加工干涉,且控制重要的刀位点以解决过切问题。 相似文献
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基于相位恢复技术的大型光学镜面面形在位检测技术 总被引:5,自引:1,他引:4
根据目前大镜加工在位检测的需求和面临的困难,把基于衍射图像检测的相位恢复技术应用到大镜面形的在位检测,建立大镜加工在位检测系统.对影响测量系统精度的主要因素以及系统的抗振动性能进行了分析和仿真,结果表明该测量系统具有较好的抗振动能力,精度接近标准球面波光源的精度.基于GS迭代算法开发了测量软件,对( 500 mm球面镜进行在位测量.把相位恢复测量结果与高精度的ZYGO干涉仪测量结果进行比较分析,结果表明在面形误差分布及误差的峰谷值(PV)和方均根值(RMS)上,两者具有较高程度的一致性,这说明相位恢复测量方法的可行性和准确性.由该方法构成的在位测量系统具有光路简单、精度较高、抗振动能力强和操作简单等特点,完全满足大镜的在位测量需求. 相似文献
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Wei Liang Xiaoming Kang Wansheng Zhao Yuxuan Yang 《The International Journal of Advanced Manufacturing Technology》2016,86(5-8):2319-2327
Shrouded blisk components are one of the core parts in aerospace engines. Five-axis or six-axis electrical discharge machining is once regarded as the best solution to manufacturing these components. The machining process, however, is time consuming and money cost. In this paper, an electron beam melting (EBM) and electrical discharge machining (EDM) combined method for shrouded blisks manufacturing was presented. In the new method, EBM was used to generate the near-net forming blank of the shroud blisk, and EDM was responsible for finish machining. The mechanical properties of the EBM formed Ti6Al4V blank was tested to be good enough for shrouded blisks. A visual identification method was proposed to establish the machining reference on the EBM formed blisk blank for the subsequent EDM process. The given example showed the required blade accuracy of ±0.03 mm can be achieved by the visual identification method. Through the combination of EBM and EDM method, the machining time of the shrouded blisk was greatly reduced by 54.8 %. 相似文献
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基于UG二次开发的叶轮刀位轨迹生成 总被引:2,自引:1,他引:1
整体叶轮型面的复杂性,导致造型和数控编程都有一定的难度.基于UG基础开发平台,根据全局干涉刀位修正原理,编制了无干涉刀位轨迹算法,开发出干涉较严重的微型叶轮类零件的5坐标加工程序.通过实验证明,无干涉刀位轨迹算法是可行的,且基于UG平台开发的算法计算速度快,操作方便,精度易于控制. 相似文献
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为了研究涂层参数失谐对整体叶盘振动特性的影响,创建含涂层的两自由度扇区集中参数模型,引入四种常见的主动失谐形式,详细分析了涂层质量、刚度、阻尼等参数失谐对系统振动特性的影响规律。创建含涂层参数失谐的整体叶盘集中参数模型,并由涂层引入常用的谐波、交替、线性及伪谐波四种形式的主动失谐。建立失谐后整体叶盘结构的运动方程,确定求解其固有频率及振动响应的方法,并给出了评价失谐程度的量化参数。通过实例分析了由涂层引入主动失谐后叶盘结构的振动特性。研究表明,叶盘系统发生由涂层引起的主动失谐后,系统最大响应随失谐量的增大呈现先上升后下降的趋势,有“阈值”现象。 相似文献
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为提高复杂曲面零件的数控机床原位检测精度,分析影响接触式检测系统精度的各项因素及其误差补偿方法。对检测系统的主要误差来源如机床几何误差、测头预行程误差和测头半径误差进行分析研究。在对数控机床的几何误差进行分析和建模的基础上,采用激光干涉仪进行三轴数控机床的单项误差测量和补偿;针对测头检测过程中存在的预行程误差,提出基于径向基函数(Radial basis function, RBF)的预行程误差预测方法,获得测头预行程误差分布图,并对检测系统进行实时预行程误差的补偿;提出改进的三角网格模型顶点法矢计算方法,有效进行三维测头的半径补偿。通过实例零件的加工精度原位检测试验及其与三坐标测量机CMM检验结果的比较,验证了原位检测方法的有效性。 相似文献
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Xu Zhengyang Liu Jia Xu Qing Gong Ting Zhu Dong Qu Ningsong 《The International Journal of Advanced Manufacturing Technology》2015,79(1-4):531-539
The International Journal of Advanced Manufacturing Technology - Electrochemical machining (ECM) is an effective method for machining a blisk. Because a blisk often has several tens to hundreds of... 相似文献
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Research on tool path planning method of four-axis high-efficiency slot plunge milling for open blisk 总被引:1,自引:1,他引:0
J. X. Ren C. F. Yao D. H. Zhang Y. L. Xue Y. S. Liang 《The International Journal of Advanced Manufacturing Technology》2009,45(1-2):101-109
The great mass of machining allowance for blisk is removed in the rough milling, so improving the rough machining efficiency for the blisk’s tunnel is the key of realizing high-efficiency machining of blisk. According to the structure characteristic of open blisk’s tunnel, a four-axis plunge slot rough milling with high-efficiency and low machining cost is advanced. First, the plunge slot process for blisk and the generation process of the ruled enveloping surface for the freeform surface of the blisk’s blade are put forward. Then, the generating method of the ruled enveloping surface for the blade’s freeform surface and the tool path generation method of four-axis plunge slot milling for blisk are studied. The rough milling region of open blisk’s tunnel is determined by generating the ruled enveloping surface of blade’s offset surface, and the algorithm of tool path for four-axis plunge milling is given. When using a ruled surface to approach a freeform surface, the problem of getting boundary is solved, and the error from the calculation of tool path is avoided by the algorithm. At last, the experiment shows that comparing to the traditional side slot milling, the cutting force of four-axis plunge milling can be reduced by 60% and even the rough machining efficiency can be increased to more than double. 相似文献
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The integral impeller and blisk of an aero-engine are high performance parts with complex structure and made of difficult-to-cut materials. The blade surfaces of the integral impeller and blisk are functional surfaces for power transmission, and their surface integrity has significant effects on the aerodynamic efficiency and service life of an aero-engine. Thus, it is indispensable to finish and strengthen the blades before use. This paper presents a comprehensive literature review of studies on finishing and strengthening technologies for the impeller and blisk of aero-engines. The review includes independent and integrated finishing and strengthening technologies and discusses advanced rotational abrasive flow machining with back-pressure used for finishing the integral impeller and blisk. A brief assessment of future research problems and directions is also presented. 相似文献