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本文浅析了数控机床的对刀操作、坐标系确定。数控车床执行程序之前必须对刀,对刀是在机床坐标系中使加工原点与编程原点重合的操作过程。对刀精度和效率决定了零件的加工精度和加工效率。 相似文献
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通过对GSK928TA数控车削加工中试切法对刀的基本原理的分析,从实用角度分析介绍了几种常用的对刀方法,并介绍了建立多工件坐标系的有效途径。更多还原。 相似文献
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对刀在数控加工中是用来建立工件与机床之间相对位置关系的一种重要手段,是数控加工中的主要操作和重要技能。在数控车床的加工操作中掌握正确的手动对刀方法和正确的对刀机床操作过程对零件加工精度的影响至关重要。因此本文介绍了数控加工中编程原点、加工原点的概念,对刀的基本原理;详细说明了数控车床FANUC 0i系统试切对刀的几种操作方法。 相似文献
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随着我国科学技术不断提高,对机械零件精准度的要求越来越高,尤其那些科学前沿的技术产品。零件生产需要数控机床进行加工制作,在生产过程中,需要利用一些相关的技术,其中就有对刀法。数控机床加工零件的时候需要对工件坐标进行设定、对刀、这些都是生产中最为重要而又关键的环节,坐标系及对刀的精准度将会直接对工件的加工质量产生影响。为了满足高精度科技产品的要求,制作出高精度的工件,本文基于数控机床的加工原理,岁其中几个最为关键的环节进行了分析,重点研究数控机床中的试切对刀法,并对该环节中存在的问题进行了探讨,在一定程度上促进试切法对刀在数控机床加工中的发展,为高精度对刀提供一些参考。 相似文献
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在我国高等教育大众化不断推进的形势下提高学生动手实操能力成为高职院校培养符合社会需求人才的重要手段。文章采用理论结合实践的方法,就数控加工中心对刀方法及应用进行了总结与分析,提高学生动手实操能力方面提供有益借鉴。 相似文献
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激光衍射对刀是通过检测激光衍射条纹峰值点间距来进行对刀间隙测量的方法。但是检测装置中装夹误差的存在会使得入射激光相对于成像光轴呈现斜入射状态,进而对对刀间隙检查结果及对刀精度产生影响。为了研究斜入射角度对衍射对刀精度的影响规律,建立了激光斜入射的衍射光强计算模型和峰值点间距误差的计算模型,进而给出了激光斜入射角度计算模型;理论结合实验分别提出了通过检测中央衍射条纹光强峰值点位置和两个一级衍射条纹峰值点间距综合进行激光斜入射角度校正的方法;根据具体实验工艺条件,确定了入射激光的最佳倾斜角度工艺调整范围,为有效提高激光衍射对刀精度提供了依据。 相似文献
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论文基于双线性对和部分肓签名构造了个电子现金支付方案。双线性对构造的签名方案具有签字短、安全、高效等特点,并将部分盲签名加入其中,既有效保护消息发送方的隐私权,又能够通过加入签名方的信息来提高存款时银行的处理效率。 相似文献
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本文对Unigraphics(简称UGⅡ)CAD/CAM软件在钣金件中的应用进行了论证,包括钣金件的三维实体造型、自动展开、自动编程与后置处理等。介绍了AMADA数控冲床专用后置处理程序的开发、调试和数控加工试验验证,并在此基础上总结出钣金件数控加工工艺路线。 相似文献
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Traditionally, plant floor communication systems in metal removal operations have been used for two purposes: downloading NC programs to machine tools, and data and status reporting and gathering. However, in a fully automated factory, the communication system will have to support many more functions. As a first step in such a development, we have designed a remote operator's interface to a NC milling machine, using the Manufacturing Message System. (MMS) soon to become EIA standard RS.511. MMS is planned to be part of MAP specification 3.0, providing an application layer service for plant floor communications. The functions supported are those which an operator would do normally at the console of the NC machine including requesting program load, setting the machine into single step or automatic operation, reading status information, starting and stopping program operation. 相似文献
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在介绍国外数控系统发展趋势的基础上,对我国数控技术的发展进行了总结,指出了我国数控技术发展中存在的问题对其产业化发展方向进行了思考,提出了我国数控系统及其技术的发展方向。 相似文献
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针对采用Heidenhain iTNC 530控制系统五轴数控机床的特点,基于UG PostBuilder软件设定机床与数控系统参数,采用TCL语言编写用户命令,定制了机床的后置处理,同时把后置处理集成于UG软件之中,通过Vericut软件进行了数控机床建模与加工仿真,使得UG Manufacturing模块生成的刀轨通过后置处理直接生成的NC代码完全能被机床识别;最后以整体叶轮为例进行了五轴联动编程及实际加工,验证了五轴编程和后置处理的正确性。 相似文献
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Performance analysis of Doppler shift effects on OFDM‐based and MC‐CDMA‐based cognitive radios
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Salem Bindhaiq Sharifah Kamilah Syed‐Yusof Haleh Hosseini 《International Journal of Communication Systems》2014,27(11):2658-2669
The present development of high data rate wireless applications has led to extra bandwidth demands. However, finding a new spectrum bandwidth to accommodate these applications and services is a challenging task because of the scarcity of spectrum resources. In fact, the spectrum is utilized inefficiently for conventional spectrum allocation, so Federal Communications Commission has proposed dynamic spectrum access mechanism in cognitive radio, where unlicensed users can opportunistically borrow unused licensed spectrum, which is a challenge to obtain contiguous frequency spectrum block. This also has a significant impact on multicarrier transmission systems such as orthogonal frequency division multiplexing (OFDM) and multicarrier code division multiple access (MC‐CDMA). As a solution, this paper develops non‐contiguous OFDM (NC‐OFDM) and non‐contiguous MC‐CDMA (NC‐MC‐CDMA) cognitive system. The implementation of NC‐OFDM and NC‐MC‐CDMA systems provides high data rate via a large number of non‐contiguous subcarriers without interfering with the existing transmissions. The system performance evaluates NC‐OFDM and NC‐MC‐CDMA for mobile scenario where each propagation path will experience Doppler frequency shift because of the relative motion between the transmitter and receiver. The simulation results of this paper proved that NC‐OFDM system is a superior candidate than NC‐MC‐CDMA system considering the mobility for cognitive users. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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This paper describes the developmental history of mechatronics equipment controllers especially within Yaskawa Electric. First, the philosophy and definition of the word “mechatronics” are introduced. Then a discussion is presented about mechatronics equipment controllers in which they mean a numerical control (NC) system for machine tools and industrial robots. The NC system covers three fields of technology: controller hardware, software, and an actuator control system (servosystem). Second, the 20-year progress of each item is discussed. Finally, the necessary performance and functions for future NC systems are outlined 相似文献