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随着加工制造业的发展,薄壁类零件的应用范围越来越广泛,技术要求越来越高。但是在薄壁套类零件的数控车削加工中还存在很多问题,影响到了加工的效率以及零件的质量,因此需要不断改进数控车削加工工艺,提高加工质量,本文将对薄壁套类零件数控车削加工工艺进行简要分析。 相似文献
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薄壁零件刚性差,在加工中易变形,使零件的形位误差增大,不易保证零件的加工质量,薄壁零件的加工是车削中比较棘手的问题。通过分析薄壁零件的加工特点,对防止和减少薄壁零件变形的工艺措施进行了综合分析和研究。实践证明,采取一定的工艺措施可以有效的解决薄壁零件变形及加工精度不高等问题。采用小锥度心轴夹具车削薄壁零件,加工过程平稳,无噪音,保证了加工质量,精度完全符合工件的工艺要求。 相似文献
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刘德成 《机械工人(冷加工)》2007,(12):59-59
一些大直径薄壁零件(如图1所示)在车削加工过程中,由于装夹、切削力等因素产生变形,从而造成加工后的零件出现椭圆等不规则变形情况,很难保证零件的加工精度,这直接影响到薄壁零件的使用效果。为提高此类零件的加工质量,我们设计了一套弹性车夹具,利用弹性可胀心轴的原理,可以有效减小零件在车削过程中的变形,确保零件的加工质量。 相似文献
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零件加工是当下机械加工行业中的重要组成部分,而薄壁零件的数控车削加工更是零件加工中的重点与难点,为了更进一步保证薄壁零件的加工质量,有关人员一定要充分了解影响薄壁零件加工精度的因素,并不断研究有效提升薄壁零件数控车削加工工艺的措施.最后,有关人员更要进一步通过薄壁零件数控车削实例,来充分掌握其加工工艺. 相似文献
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《机械工程与自动化》2016,(3)
以薄壁零件"变形管"为研究对象,研究薄壁零件的数控车削加工工艺,并对工装夹具进行优化设计,改善了薄壁管零件的加工变形问题,减少了工件装夹、定位时间,提高了加工效率和精度,使产品的工艺性和经济性得到显著的提高。 相似文献
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薄壁零件具有质量轻、节约材料、结构紧凑等特点,但刚性差、强度弱,不仅装夹容易变形,而且在车削中产生的切削力和切削热都会使零件变形.针对薄壁齿轮零件厚度较薄、加工精度要求较高、加工过程中容易产生变形等问题,对加工工艺进行改进,解决工件的变形问题,保证了零件的加工质量. 相似文献
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机械加过工艺系统复杂、环节多、影响因素多,对零件加工精度影响较大。为确保零件加工精度符合质量要求,必须对加工工艺环节中影响零件加工精度的因素进行控制。本文简单介绍了机械加工工艺,分析了机械加工工艺中影响零件加工精度的因素,探讨了基于机械加工工艺提高零件加工精度的措施。旨在为机械加工工艺中零件加工精度的控制提供一些参考。 相似文献
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Ming Zhou Fuzhu Han Yongxain Wang Isago Soichiro 《The International Journal of Advanced Manufacturing Technology》2009,44(3-4):283-292
Time series data of gap state were often used as feedback signal in EDM control systems. An effective way to quantify gap state in machining was developed in this paper. Based on a time series of gap states recording a machining process, the entire process was partitioned into three parts, transient process, efficient machining process, and deleterious process. It is expected that efficient machining process should be maintained long enough in consideration of machining efficiency and avoiding workpiece surface damage. In this case, a signature of structural change from efficient machining process to deleterious process has to be detected or detected in advance. It has been found that linear analysis methods failed the task. In this paper, a nonlinear analysis method, cross-prediction error, was employed to track this structural change in efficient machining process in two tests. In the first test, the efficient machining process was roughly split into 30 segments. By using the cross-prediction-error method in this test, the non-stationarity, a signature of structural change from stationary process in efficient machining process to non-stationary process, was successfully revealed in the last segment of the process. In another test, efficient machining process was even more finely split into 70 segments, and by using the cross-prediction-error method again it is found that the detected non-stationarity in the process was in the last segment but one. The second test not only proves the effectiveness of the method, but also brings forward the detected non-stationarity more than 10s. The detected non-stationarity in advance, thus, is supposed to be used for avoiding the occurrence of abnormal deleterious process and maintaining a persisted efficient machining process. 相似文献
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ZHANG Cuixia LIU Conghu ZHAO Xi 《The International Journal of Advanced Manufacturing Technology》2017,92(5-8):1601-1607
Energy conservation has become one of the key elements of core competitiveness for manufacturing enterprise. On the basis of studying the characteristics of carbon emissions in machining process, the state space model of carbon footprint for machining process is constructed, and carbon footprint transfer matrix is derived. It reveals the mechanism of generation, transmission, and coupling for carbon footprint in machining process. Considering the machining precision constraints and time constraints, the paper researched on optimization control method for carbon footprint of machining process based on dynamic programming to minimize the carbon emissions. Finally, this method is applied in a fracture splitting workshop, and the result shows this method can reduce 10.28% of carbon emissions in machining process. This paper provides theoretical and technical support for energy saving in machining process. 相似文献
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基于本体论的机械加工工艺知识管理 总被引:4,自引:0,他引:4
利用本体表述知识的先进思想,对机械加工工艺知识进行了本体描述,提出了基于本体实现工艺知识管理的方法;探讨了机械加工工艺知识本体的构建过程;给出了基于本体的工艺知识管理系统的结构。 相似文献
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本文对电火花加工用石墨电极的结构特征进行了加工工艺分析,对其数控加工工艺做了研究,介绍了石墨电极的数控加工方法,解决了石墨电极数控加工中容易出现的崩角等问题,对石墨电极的加工规范做了探讨。 相似文献
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研究了基于精英选择遗传算法的加工工步序列优化技术。传统的加工工艺路线是以工序为制造单元,而在基于STEP-NC的加工中,是以加工工步为制造单元,并且面向数控加工中心的一种加工过程,由加工工步变换所带来的零件转位、刀具更换等所消耗的辅助加工时间为最短作为优化目标,来进行加工工步序列的优化,并对加工工步序列的优化算法进行了验证。 相似文献
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针对三维机加工艺在制造端轻量化的需求,文中研究了一种复杂零件三维机加工艺网络化发布方法。首先,以工序特征模型作为信息载体代替二维工序图纸。针对机加工艺模型的多工序的加工特性,给出了多工序模型的输出方式,并采用中间转换法对工序模型进行轻量化处理以满足Web端可视化需求,让工艺制造端显示更加直观可靠。其次,为了更好地体现复杂零件的加工面,分析了机加工艺工序模型加工特征轮廓的提取应用方法,包含边界曲线的格式定义以及网络显示方式。最后通过实例验证了文中所述机加工艺模型发布方法的可行性和有效性。 相似文献
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Integration of thermo-dynamic spindle and machining simulation models for a digital machining system
Hongqi Li Yung C. Shin 《The International Journal of Advanced Manufacturing Technology》2009,40(7-8):648-661
A digital machining system is a core subsystem of a virtual machining system at the lowest level, and it provides physical attributes of both the machining process and machine tool to the upper application level. A digital machining system based on mechanistic models is developed. An expandable general base model is built in the system and the interfaces for extending to upper level models are provided for easy integration. The system consists of many integrative dynamic machining process simulation models including milling, turning, boring and grinding. The development of the digital machining system is completed by integrating a spindle analysis model through a modular interface using modal superposition methods. The digital machining system is evaluated in aspects of determining spindle related machining process constraints, predicting spindle condition-dependent chatter boundaries and selecting cutting tools. 相似文献