数控技术在格里森铣齿机中的应用

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。     

第六届中国国际机床展览会特种加工机床展品水平分析

通过对第六届中国国际机床展览会（ＣＩＭＴ’９９）特种加工机床展品的水平分析，介绍了国内外特种加工领域的现有水平和先进技术，指出了特种加工机床的发展方向。     

Ф160卧式镗铣床数控系统常见故障的处理

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…     

技术转让

技术转让ＨＪＣＮＣ数控产品系列（１）ＨＪＣＮＣ数控机床编程模拟软件包该软件包可以在ＩＢＭ系列个人微机上全屏幕编辑ＩＳＯ标准数控代码程序，具有高档数控机床的编程功能并进行彩色动画加工仿真，配有背景音响，实时显示各坐标值和加工时间，编程功能丰富，具有绝对...     

复合材料群孔的高效精度加工方法

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。     

ZCN0545与ZCP0545低功率IGBT及其应用

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...     

DC—3CN中央控制器输出信息处理系统

ＤＣ—３ＣＮ中央控制器输出信息处理系统武汉市电信局王志伟，张明，朱宇飞，王嵩，徐凌燕一、ＤＣ—３ＣＮ中央控制器功能简介ＤＣ—３ＣＮ中央控制器（以下简称中控器）用于接收来自磁卡公用电话ＤＣ—３ＣＮ（以下简称电话机）的故障信息及进行话务管理、数据修改，并...     

CO_2激光器在材料加工中的应用

本文简要介绍了用于材料加工的ＣＯ２激光器的发展概况，重点介绍了大功率和低功率ＣＯ２激光器在材料加工中的应用。     

电火花线切割用脉冲电源

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...     

组装CuTCNQ有机微晶体器件的电学特性

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。     

基于PLC的数控机床电气控制系统研究

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。     

基于labview的热变形误差计算及补偿方法

温度是机械加工中最基本的参数之一,在生产过程中常需要对温度进行检测和监控。数控机床加工中,常需要对数控机床进行热误差计算并实现热误差补偿,通过热误差补偿技术来达到提高数控机床加工精度的目的。因此,研究一种基于串行通信的多路温度采集和实时监控系统,对提高工业控制性能、提高数控机床的加工精度以及提高生产效率有着重要的意义。     

FPGA based acceleration and deceleration circuit for industrial robots and CNC machine tools

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.     

数控机床多故障诊断专家系统设计

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.     

Cross-coupled fuzzy logic control for multiaxis machine tools

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.     

合康变频HID600A系列高性能矢量变频器在数控机床的应用

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。     

A new health estimation model for CNC machine tool based on infinite irrelevance and belief rule base

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.     

基于非均匀B样条拟合算法的加工误差测量

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.     

微型钻头全自动数控精磨机结构设计及精度分析

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。