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从数字上分析了格里森铣齿机床的“修正机构”附加运动的调整计算原理,研究了美国90年代生产的格里森640型CNC准双曲面齿轮加工机床。指出了国产格里森机床辅助调整的复杂性和应用数控技术的必要性,并设计出了数控方案,使得该机床具有良好的人机界面,方便了工人操作和节省了辅助调整时间,提高了产品质量和机床生产率。 相似文献
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160卧式镗铣床的数控系统SINUMERIK810M由CPU模块、位置控制模块、存储器模块、文字图形处理模块、CRT显示器、接口模块、I/O模块及操作面板等组成 ,它是一种通道式结构的CNC系统 ,通过RS2 32C接口进行数据传输。1 西门子SINUMERIK 81 0K系统常见故障的分析和排除( 1)CPU监控报警。如果此报警灯亮 ,则系统不能被启动 ,CNC系统处于故障状态 ,这可以从以下几个方面查找故障原因 :CPU模块中的跨接端子接错 ;EPROM存储器故障 ;总线板损坏 ;机床参数错误 ;启动芯片损坏。如果CPU监控报警发… 相似文献
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本文简述了复合材料群孔的高效高精密加工方法-无毛刺钻削,CNC磨削,WEDG电加工,行星机构法,同步加工法,并对各自的加工对象及加工精度作了介绍。这对于设计者和加工者掌握这一领域的最新动态,选择最佳的加工手段有一定的指导意义。 相似文献
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ZCN0545与ZCP0545低功率IGBT及其应用毛兴武,祝大卫绝缘栅双极晶体管(IsolatedGateBipolarTransistor),英文缩写为IGBT。该器件于80年代初问世,80年代末实现了商品化。IGBT是一种功率半导体器件,主要应... 相似文献
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电火花线切割用脉冲电源顾水方1.引言电火花加工机床包括电火花成型加工机床、电火花线切割加工机床、电火花深孔加工机床等几种,普遍应用于模具加工行业,其中尤以电火花线切割加工机床的应用为最广。高频(音频或超音频)脉冲电源则是电火花加工技术的重要支柱。这里... 相似文献
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采用液面控制的电化学方法制备出间距可达几生米的Cu-Cu,Cu-W双微电极结构,然后在双微电极结构中自组装CuTCNQ有要微晶体,进行直流电学特性测量,测量结构表现出不同于CuTCNQ薄膜所呈现出的电学性质,对此进行了初步的讨论。 相似文献
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为了提高数控机床的加工精度及安全可靠性,本文基于PLC对数控机床的电气控制系统进行设计,设计了上位机功能、PLC程序、伺服机构,并对系统的精度进行了验证,结果表明,数控机床的精度较高。 相似文献
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《Mechatronics》2002,12(4):635-642
In order to make industrial robots and computer numerical control (CNC) machine tools perform tasks efficiently, many techniques for the acceleration and deceleration of industrial robots and CNC machine tools have been proposed. Polynomial technique can generate velocity profiles of various acceleration and deceleration characteristics, but it requires a lot of computations. Digital convolution technique can generate efficiently velocity profiles, but it cannot generate velocity profiles with some kinds of acceleration and deceleration characteristics. This paper proposes an efficient approach for generating velocity profiles that cannot be generated by previous techniques as well as velocity profiles generated by them. Based on the proposed approach, an acceleration and deceleration circuit for industrial robots and CNC machine tools is designed by using the VHDL and it is implemented with a FPGA. A velocity profile generated by the acceleration and deceleration circuit will be applied to one single-axis control system. 相似文献
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系统以数控机床的数控系统为分析对象,结合某数控公司提供的故障分析手册和积累的案例以及参照该公司故障诊断专家给出的诊断方法,学习其他的专家系统的成功经验,设计了一套数控机床图形化多故障诊断系统.文中介绍了数控机床故障诊断专家系统中的一个故障诊断的方法,它具有多故障诊断的能力,可以图形化辅助诊断过程.开发了一种新的匹配算法,它是由最近相邻算法根据本系统的实际情况而开发的一种新算法.对于多故障诊断,系统采用化多故障为单故障处理的方法.开发了图形化辅助诊断功能,提高了诊断系统的实用性.开发了针对数控机床故障诊断的自学习功能,实现了故障诊断的经验积累. 相似文献
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Cross-coupled fuzzy logic control for multiaxis machine tools 总被引:1,自引:0,他引:1
This paper presents a design and implementation case study that focuses on contour control of a biaxial CNC machine tools. Since, it is difficult to obtain an accurate nonlinear mathematical model of cross-coupled multiaxis machine tools, here we investigate an alternative to conventional approaches where we employ crosscoupled fuzzy logic controllers for improving the contouring accuracy of multiaxis CNC machine tools. A new fuzzy rule-generated method which is based on a performance index of the contour error obtained from an on-line estimation algorithm is proposed. An adapted output scale factor is adopted to improve the system performance. Experimental results have shown that the desired contouring accuracy can be achieved, and the proposed approach outperforms over uncoupled approaches. In conventional control, increasing contour feedrate for productivity may result in larger contour errors. However, the experimental results have shown that the performance of the proposed approach is still quite good with increasing contour feedrate. 相似文献
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现代制造技术的快速发展对数控机床的使用提出了更高的要求。合康变频专注于变频调速技术,自主研发的HID600A系列高性能矢量变频器凭借优越的性能及高性价比成功应用于数控机床行业。本文主要介绍合康变频HID600A在台州楚门镇硕瑞机械厂数控机床的典型成功应用。 相似文献
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To guarantee the normal workflow and determine scheme of optimal maintenance, it is important to accurately estimate the health condition of computerized numerical control (CNC) machine tool. In current studies, the health condition of CNC machine tool is modeled by using one feature. Due to the complexity of CNC machine tool, the estimating accuracy of the current models is poor and real-time performance cannot be satisfied when multiple features are chosen. Moreover, it is difficult to obtain more effective monitoring data when the CNC machine tool is from normal to failure. To solve the problems, based on infinite irrelevance and belief rule base (BRB), a health estimation model which is named as the infinite irrelevance BRB model is proposed in this paper. In particular, the infinite irrelevance method is used to select key features to optimize the model structure, and BRB is applied to estimate the health condition according to the monitoring data and expert knowledge. Thus, the quantitative monitoring data and expert knowledge can be used effectively to improve accuracy and real-time performance of health estimation. Furthermore, because the initial values of the parameters in the proposed infinite irrelevance BRB model given by experts may not be accurate, the constraint covariance matrix adaptation evolution strategy (CMA-ES) algorithm is employed to train the parameters. A case study for the servo system of the CNC milling machine is used to verify the effective and accuracy of the proposed model. The results show that the infinite irrelevance BRB model can accurately estimate the health condition of the servo system. 相似文献
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数控机床加工零件,通常在零件加工后采用另外的仪器进行加工误差测量,重复装夹必然造成精度降低和工时延长.数控机床通过控制走刀路径使其按照特定轨迹运动,因此工件的加工误差可通过测量轨迹误差得到.文中运用非均匀B样条曲线拟合及曲线特征点提取的方法,将测量轨迹与理想轨迹进行拟合实现工件加工误差的在机测量.通过在数控机床上试验一直线圆弧样品加工验证了该方法的可行性. 相似文献
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文章介绍了用于微型钻头钻径精加工的全自动数控精磨机的工作原理和主要的结构设计,分析了影响机床加工精度的因素,提出了改善加工精度的措施,对于微钻加工设备的设计有重要参考价值。 相似文献