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李柏青 《机械设计与制造工程》2000,29(4):62-63
针对模具零件单件水批量生产的特点,举例分析了机械零件数控加工工艺与传统机械加工工艺的的异同,论述了辅助曲面在拟订数控加工工艺以及优化数控加工刀路方面的应用。 相似文献
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《机电新产品导报》2006,(8):90-90
近日,CAXA全新推出了一款“CAXA高速铣雕机”,该机床可满足各种高质量、高精度、高效率的数控铣和雕刻的要求,尤其适合电极、精密五金模具等的加工制造。早在2002年CAXA根据十多年来在模具行业服务的丰富经验以及对模具行业的深刻理解,就设计了拥有自主知识产权的模具加工专用机床——“CAXA数控模具铣雕机”,并获得了国家专利(专利号:ZL 032 00066.9),该机床经过两年多的持续改进和生产验证,于2004年7月正式上市销售。“CAXA数控模具铣雕机”一经面市,备受广大模具加工企业的青睐,而且还被列为“2005年度北京市火炬计划项目”,得到北京市政府的大力扶持和推广。目前,“CAXA数控模具铣雕机”已经进入批量生产和销售阶段。 相似文献
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NC EDM在模具制造中的应用 总被引:1,自引:1,他引:0
本文简要地叙述了数控电火花成型机和数控电火花线切割机的关键技术及其发展趋势,并以典型的加工实例说明在精密复杂模具加工中的应用前景。 相似文献
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随着科学技术的不断进步,模具数控加工技术更加成熟应用更加广泛,尤其在精密模具的加工中,数控加工的优越性得到充分体现。本文主要从影响模具数控加工质量的影响因素出发进行分析,提出相应的改进策略,以减少外在因素对模具数控加工质量的影响。 相似文献
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模具型腔的高效复合超精密研磨 总被引:7,自引:1,他引:6
模具型腔光整加工的质量和效率一起是影响模具工业发展的重要因素。在综合研究国内外型腔表面超精密研磨技术的基础上,开发研制了将数控切削、电解加工及机械研磨等技术相复合的数控展成超精密电解研磨新的工艺,实现了对模具型腔的高效镜面加工。实验表明:针对不锈钢等不同模具材料,使用该技术可稳定地得到Ry〈0.03μm镜面,其加工效率较普通研磨提高3倍以上。 相似文献
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模具数控加工切削参数优化方案模糊综合评价 总被引:1,自引:0,他引:1
模具数控加工过程影响工艺参数选择的因素较多,如刀具材料、刀具几何形状尺寸以及切削用量参数等,这些工艺参数选择往往带有较大的模糊性.针对其模糊性特点,从生产实际出发,结合专家经验,构建了模具数控加工切削参数优化方案模糊综合评价模型,并应用构建的评价模型通过对典型模具数控加工切削参数方案优化评价实验研究,证实了该评价方法的先进性、可行性和实用性,为模具数控加工切削参数的优化选择提供了一种新方法. 相似文献
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高速切削在模具数控加工中的技术应用 总被引:1,自引:0,他引:1
在现代模具制造中,高速的数控加工技术已成为大型精密模具机械加工的主要手段,阐述高速加工的概念、特征和原理.论述载高速数控加工模具时对刀具的要求和切削用量的选择,并对高速粗加工和精加工数控编程特点和方法进行介绍. 相似文献
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现在许多厕所都使用全自动冲水感应器,文中论述了冲水器面板的数控加工方法,并针对此类面板特点,结合批量加工的需要,提出了合理的工艺方案,尤其采用一面二销的夹具定位装夹方案,只需一次找正,避免了以后批量加工的重复找正,极大地提高了生产效率。文中思路和方法对此类零件的数控加工具有通用性。 相似文献
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NC simulation with dynamic errors due to high-speed motion 总被引:3,自引:0,他引:3
H.-T. Yau J.-Y. Ting C.-M. Chuang 《The International Journal of Advanced Manufacturing Technology》2004,23(7-8):577-585
Traditional NC simulation has not always considered dynamic contouring errors in machining when simulating a tool path. For instance, if the feed rate is high, the effect of dynamic machining errors will be apparent on the work piece, but traditional NC simulation does not account for the dynamic errors at all. Due to the increasing demand of reducing product cycle time, high-speed machining of dies and moulds are becoming more and more popular. Under high-speed motion, over-cut or gouging can easily occur even when traditional NC simulation proves that the NC path is correct. Therefore, it is of significance to be able to predict dynamic machining errors in NC simulation before the part is machined, especially under high-speed motion. This paper presents the simulation of NC machining with dynamic contouring errors under high-speed motion. By adding dynamic error models to a simulation, the errors can be clearly displayed on a Z-map model. Hence, it becomes possible to predict under what conditions dynamic errors may occur. Comparing the Z-map model after simulation with the CAD model also makes it possible to find where the dynamic errors occur. This will also allow us to obtain useful information to determine where and when to change the feed rate in order to meet the accuracy requirement. 相似文献
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在建立数控加工常用组合夹具数据库的基础上,进行零件数字化装夹仿真设计。运用零件三维装夹仿真模型、柔性夹具组装图和夹具明细清单,指导生产现场搭建工装夹具。实践证明,应用该项技术不仅能提高数控加工工装准备的反应能力、雷达精密零件数控加工的质量稳定性及批量生产能力,还能提高数控机床的利用率。 相似文献
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虚拟加工平台的构建、数控加工程序的正确性验证及加工过程的仿真与优化及是五轴数控机床实现高效加工的重要基础技术。基于VERICUT数控加工仿真与优化平台,以非正交五轴数控机床DMC70ev为研究对象,构建了数控加工仿真平台;以曲面加工为例,建立了基于恒定体积去除率和恒定切屑厚度的优化设计数学模型,进行了刀位轨迹的优化。应用表明:研究成果实现了五轴数控加工过程仿真及数控加工程序的正确性验证,减少了刀具磨损,提高了加工效率与加工质量,可以较好地提升企业数控加工技术的应用水平、应用质量,推动现代制造技术的发展。 相似文献
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高速加工和高效加工是目前获得高效机械加工生产率的重要手段,它在航空和航天产品的零件制造、模具制造以及汽车零部件制造等领域有较大的需求。机床采用高速传动技术、高速进给技术、高速切削刀具,配以大功率或大扭矩主轴系统以及复合加工技术,可实现高速加工与高效加工。近几年我国在机床高速化技术方面的研究开发取得了长足进步,并开发出相应的主机产品,为我国数控机床向高速、高效和精密方向发展奠定了基础。 相似文献
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GSHM7060四轴联动卧式加工中心的研制 总被引:2,自引:0,他引:2
卧式加工中心是一种高效、高性能的数控机床,在一次装夹中可进行四个面的铣削、钻孔、扩孔、镗孔、铰削、攻丝等多种工序的加工,最适用于中、小批量、多品种的箱体零件以及曲型零件的加工。本文介绍了一种四轴联动卧式加工中心的机械结构,特点及其关键技术,通过建立高速加工中心机床的三维有限元模型,利用有限元分析软件对机床进行动力学分析,找出影响整机动态性能的薄弱环节并提出结构设计修改方向,从而使机床具有更好的静态、动态特性。 相似文献
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Simulation systems for NC machining that also provide an analysis and verification component are a powerful tool to detect errors in NC codes off-line, i.e. before the NC program is put onto the machine and before damage can happen. The modelling scheme used to represent the workpiece and its development during machining has a great influence on the behaviour and the efficiency of the whole system. Without a well-chosen modelling scheme a realistic simulation and, especially, analysis and verification of NC programs are not possible. Recently, at RISC-Linz, an NC simulation system, NC-SAVE, has been developed that is based on the dexel model. The dexel model is an instance of spatial enumeration techniques, so it is an approximation technique, which allows the user to specify the accuracy he needs. Practical experience with the system has shown that the dexel model allows an efficient dynamic update of the workpiece and provides many facilities for analysis operations. In this paper, we study the accuracy of this modelling scheme. More precisely, we give formulae that state, depending on the curvature of the objects to be modelled, which resolution to take for the model to achieve a certain (pre-specified) accuracy. We also consider the influence of Boolean operations on the accuracy of models. The question of the interdependence between accuracy and resolution of the model, and also the influence of various operations on the model is quite important, in order to choose the resolution of the model in such a way that tolerances are kept. It turns out that the encoding of an object has to be done quite carefully in order to guarantee a certain accuracy of the model and to ensure that analysis operations and comparisons of models work properly. The insights from the theoretical analysis of the dexel model are interpreted in terms of their influence on practical applications of the system NC-SAVE. A much better understanding of the importance of good choices for the resolution of the model and the number and the positions of the viewpoints is provided. It is not the intention of this paper to demonstrate the usefulness and the advantages of the system NC-SAVE. It is rather the goal of this paper to give a careful analysis of the accuracy of the modelling scheme used within NC-SAVE. Such an analysis, together with recommendations for the use of the system, improve the results of the simulation. 相似文献
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通过汽车滤清器盖顶的实际加工例子,介绍小批量产品的数控加工工艺设计;还对此薄壁件的加工设计了专用夹具,这样更能保证加工精度及其稳定性,同时也提高了加工效率. 相似文献
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论述了在凸凹模数控加工时如何处理测量数据点,生成边界曲线,边框曲面及拟合曲面的方法,讨论刀具运动轨迹的生成和编辑方法,并介绍数控加工数据转换技术在汽车覆盖件模具制造上的应用。 相似文献