活塞环数控车床控制系统设计

针对活塞环自由型线的加工特点,介绍了笔者研制的新型活塞环全数控加工设备的控制系统工作原理和结构方案。     

专用锥形活塞环数控车床的改造

文章首先对锥面活塞环的锥面加工进行了分析,提出了一种新型的锥形活塞环加工方法,确定了对原型数控车床的改造方案,同时将自行开发的SEMENC-103S开放式数控系统应用到该车床上,进行了实验切削。     

活塞环加工凸轮实际工作曲线的研究

通过对活塞环加工机构的分析研究，导出靠模机床滚轮中心轨迹曲线，进而推导出活塞环加工凸轮实际工作曲线，从理论上消除了凸轮设计误差。     

高速响应活塞环数控车床关键技术的研究

活塞环内外圆轮廓是一种不规则的自由型线，切削加工困难，通常所用的仿形靠模车床存在加工效率低、调整周期长、易于磨损等缺陷。在分析活塞环切削加工特点的基础上，应用直线伺服电机研制开发了一台高速响应活塞环数控车床，并对该机床研制中的关键技术，如活塞环开口过渡曲线拟合、快速响应刀具进给系统研制、机床总体结构设计、活塞环CAD／CAM软件模块开发等进行了阐述。     

活塞环加工与新型数控车床方案研究

从活塞环自由状态轮廓型线出发，分析了活塞环内外圆切削加工对设备的要求，讨论了现有各类活塞环内外圆切削加工设备的特点和存在的不足，介绍了笔者正在研制的新型活塞环全数控加工设备的工作原理和结构方案。     

扬州大学制成活塞环数控车床

扬州大学机电研究所成功研制出处于国内领先水平的活塞环数控车床,填补了国内在直线电机驱动的活塞环数控车床领域的空白。     

高速响应活塞环数控车床关键技术的研究

活塞环内外圆轮廓是一种不规则的自由型线,切削加工困难,通常所用的仿形靠模车床存在加工效率低、调整周期长、靠模易于磨损等缺陷。在分析活塞环切削加工特点的基础上,应用直线伺服电动机研制开发了一台高速响应活塞环数控车床,并对该机床研制中的关键技术,如活塞环开口过渡曲线拟合、快速响应刀具进给系统研制、机床总体结构设计、活塞环CAD/CAM软件模块开发等进行了阐述。     

活塞环数控车床动态性能测试系统研究

通过对自主研发的活塞环数控车床在使用中出现的问题分析,提出了该设备动态测试的必要性,并对其进行了动态测试方案分析和切削动应变测试数据信号分析,为该数控机床今后的结构改进设计提供了依据。     

铸造活塞环的炉前控制

炉前控制是稳定铁液质量、满足铸件力学性能要求的重要环节。由于活塞是特小的薄壁件,在冷凝过程中对外界因素变化的影响特别敏感。例如,铁液成分、温度及孕育处理等。为了妥善处理好这些特性,有必要对活塞环炉前控制的几个问题进行研讨,以便更     

木材旋切机沟槽凸轮的数控加工工艺改进

以木材单板旋切机进给控制凸轮机构的盘状沟槽凸轮的数控加工为例,提出对盘状沟槽凸轮轮廓的加工要求和改进的工艺措施,介绍数控加工过程中所遇到的问题及采取的措施。     

Real-time synchronization method based on dual ring fieldbus in CNC system

As the popularization of dual ring fieldbus, the optimized dual ring synchronization methods are still in short. The current synchronization methods are generally established in traditional industrial fieldbus, in which transmission is commonly considered in single track, the two-way transmitting cannot take full effect, and would result in unwanted idle load on equipment lines. In stamp-transferring part, the synchronizing algorithm is not properly processed to diminish the latency, so the real-time performance of entire system cannot be ensured. To support the synchronization control of stations in the CNC system, a real-time time synchronization method for dual ring fieldbus in the CNC system is designed in this paper. In this method a synchronizing message transmission scheme based on dual ring architecture and the synchronization algorithm between master and secondary stations are integrated. In the scheme, the clock models of both master and secondary stations are optimized with corresponding modules and the stamp data transmission based on the dual ring fieldbus is devised exclusively, so the transmitting efficiency improves with less idle work. In the algorithm, all the secondary stations can accomplish the consistent state with master station by updating clock discrepancy information in one communication cycle, and it takes the advantage of two-way transmitting and makes the best use of dual ring structure, so the real-time performance of the system can be promoted while retaining the precision of synchronization. To evaluate the performance, the costs of the method and errors during synchronizing are noted and analyzed based on the actual running environment in the industrial fieldbus. The results show that it reduces communication cost and ensures the smoothness of the system with low lag effects under heavy load. The proposed time synchronization method optimizes the architecture of sync message transmission in dual ring fieldbus, and improves the efficiency of time synchronization in the stations of CNC system.     

一种实用的数控系统加减速控制方法

阐述步进电机速度控制原理 ,并介绍微机进行加、减速控制方法及控制软件     

基于机器视觉的活塞环闭口间隙自动检测

利用位置补偿功能对标准环规进行自动定位,通过线阵CCD实现对活塞环图像的高分辨率图像采集,应用小波变换准确提取活塞环的图像边缘,自动计算活塞环的闭口间隙,从而为自动判定闭口间隙尺寸是否合格提供可靠的测量依据,实现对活塞环闭口间隙的自动检测。     

浅谈Sinumerik 802s数控车床对刀

阐述了数控车削加工、机床坐标系、机床原点、工件坐标系、工件原点、对刀等概念,并通过具体实例详细介绍了Sinumerik 802s数控车系统对刀方法和步骤,并给出了验证对刀结果的编程方法。     

数控车床实验系统的主轴变频调速系统设计分析

主要针对要求高精度、快响应的数控车床主轴调速系统的设计要求,通过对变频调速的基本原理和变频方式的分析,提出了变频电机与变频器组合的调速方案.根据数控车床实验系统的运行条件,计算车床的切削力和主轴电机的功率,为选择实验系统的主轴变频调速电机提供依据.根据选定的变频电机的特性,提出了变频器的选择原则,进而选择了额定容量和额...     

Experimental study of wear interaction between piston ring and piston groove in a radial piston hydraulic motor

The wear interaction between piston ring and piston groove in a radial piston hydraulic motor was studied in regard to mass loss and changes in form and surface roughness. A specially developed test rig that simulates the tilting movements of pistons at the end of strokes was used in the test. The results show that wear on the piston ring groove can be up to 10 times greater than the wear on the piston ring. For both interacting surfaces, the dominant wear mechanism was mild wear. The results from a factorial design show that the form of the piston groove significantly influences the amount of wear.     

变导程螺纹数控车床的车削

介绍变导程螺纹的数控车床加工方法,以及在数控车床加工中的具体调整,为生产中解决变导程螺纹的加工提供参考。     

高速数控车床进给系统切削运动平稳性分析

高速数控车床的进给系统是其重要部件,其切削运动平稳性对产品的加工质量影响非常突出.分析了高速数控车床进给系统切削力,应用ADAMS软件建立了高速数控车床进给系统刚体和柔性体结合的动力学虚拟样机,为了提高分析效率,对高速数控车床进给系统原始设计进行了简化,这些简化均不会对整体应力分布有明显影响.通过仿真分析,得到了高速进给系统X向进给平台质心的X、Y、Z三个方向运动轨迹的误差曲线,仿真结果验证了所设计的高速车床进给系统达到了要求,为高速数控车床进给系统的设计提供了依据.