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随着微机电和纳米技术的快速发展,复杂形面微小零件的加工显得越来越重要。本文对复杂形面微小零件的精密切削工艺进行了分析,重点探讨了微细切削加工机理、刀具选择、刀具路径规划以及切削用量的选择。 相似文献
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本文在 A U T O C A D 的基础上开发了零件 N C铣加工刀具运动轨迹的仿真设计功能,在消除加工残留量、复合刀轨仿真设计、加工轨迹仿真优化等方面进行了深入研究。为提高零件的加工精度、保证正确地加工提供了有力的保障 相似文献
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基于UG NX 8.0平台,以灯罩这一复杂曲面为例,详细介绍了复杂曲面的造型方法,并研究了UG CAM中平面铣、型腔铣和固定轴曲面铣在复杂曲面三轴数控加工中的应用情况。 相似文献
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通过图形,详细介绍了高速五轴五联动加工中心的原理和CAM编程方法,并以实例说明在钟表行业中应用五轴加工中心的工艺优点,实现了产品从设计制造的一体化。 相似文献
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人社部OSTA下的铣工(数控铣床)项目认证考试是以实际数控铣削加工为依据的职业资格认证之一。其证也是“双证融通,产学合作”高职数控技术专业人才培养常见认证项目。通过选取典型铣削零件项目,选用《零件的三轴数控编程与加工》课程中的自动加工模块知识,进行了工艺分析、CAD建模、CAM编程、机床通讯传输设置及数控加工等,可对数控零件加工起到一定的借鉴作用,也能探索全程全方位培育高职数控加工人才。 相似文献
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四轴加工技术主要应用于加工具有较为复杂曲面的工件,本文论述了数控铣削加工中的四轴加工技术应用,并以双头螺杆的加工过程为例,说明了四轴加工的应用以及四轴加工中的干涉问题是如何产生和避免的方法。 相似文献
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船舶三维生产设计现状及二次开发技术的应用 总被引:1,自引:0,他引:1
国际造船行业竞争日趋激烈,三维生产设计系统能够大大压缩船舶生产周期,降低生产成本,提高船舶企业利润。通过对国内外先进CAD/CAM系统进行必要的二次开发,可以充分、有效地发挥先进CAD/CAM系统的功能,从而提高企业整船技术和生产设计能力,获得较高收益。首先介绍船舶三维生产设计的国内外现状,通过武昌造船厂的应用案例介绍了国内企业使用船舶三维生产设计的现状及存在的情况,并提出了国内企业对船舶三维生产设计系统进行二次开发的必要性,最后介绍了三维船舶生产软件二次开发内容与方法。 相似文献
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A. Senthil kumar F. K. Salim Professor A. Y. C. Nee 《The International Journal of Advanced Manufacturing Technology》1996,11(2):136-145
Prismatic parts usually comprise basic features, such as slots, steps, holes, bosses, which may intersect with one another. In general, automatic recognition of intersecting features is difficult and may present bottlenecks when automating the design procedures which make use of features for downstream operations.This paper presents a novel approach to recognising intersecting features and auxiliary features due to tool movements and cutter radii. Since no cutting edges can be perfectly sharp, corner fillets on machined features are invariably created by end mills and other cutters. Fillets, on the other hand, could very well be features which have been designed to increase strength and reduce stress concentration of certain features. A feature recognition system is proposed to recognise features having fillets which may be either design or manufacturing features. This information will be useful to the product designer as it would be possible to distinguish between the intended and unintended features of a part. The developed system has been implemented on an HP-ME30 Solid Modeler. 相似文献
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直动从动件圆柱凸轮变参CAD 总被引:7,自引:0,他引:7
介绍了Pro/E环境下利用Program功能实现圆柱凸轮参数化造型的方法及步骤,可使该类凸轮的设计与制造效率、精度、及智能化程度大为提高。 相似文献
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针对目前CNC手板生产中配合件配合失败较多的情况,根据CAD文件交换的标准和数控自动编程的插补原理,分析了配合件配合失败的原因.提出对复杂配合曲线采用重新确立空间基准,统一编辑配合曲线的方法,保证加工对象的同一性,满足了配合件加工的需要.最后用对比实验进行了验证. 相似文献
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本文运用CAD/CAM软件—Geomagic Studio、CimatronE,以鞋楦逆向设计为实例,论述了点云处理、错误修复、曲面生成的方法,对样品鞋进行逆向设计及数控加工程序编制,提出了一套完整的鞋楦逆向设计及数控加工的方法,并为模具设计提供了建构复杂曲面模型的有效途径。 相似文献
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Rakesh Ranjan Niraj Kumar Rupesh Kumar Pandey M.K. Tiwari 《The International Journal of Advanced Manufacturing Technology》2005,26(7-8):861-869
Feature recognition systems are now widely identified as a cornerstone for conceiving an automated process planning system.
Various techniques have been reported in the literature, but a few of them acquired a status of generic methodology. A flexible
and robust approach is demanded for recognising a wide variety of features, e.g., non-interacting, interacting circular and
slanting features. This research aims to exploit the concept of the ray - firing technique, in which a 2D surface pattern
for each feature is generated and information is extracted from these patterns to correlate it with the corresponding machining
features. The system first defines a virtual surface and then probing rays are dropped from each point of this surface to
the 2.5D features of the B-rep solid model. According to the length of rays between the bottom face of the 2.5D machining
features and the virtual surface, 2D feature patterns are formed for each machining feature. Finally, features are recognised
using an algorithm described in this article. Different types of examples have been considered to demonstrate the effectiveness
of the proposed approach. 相似文献