基于MODBUS协议的激光雕刻切割系统HMI人机交互设备

近年来,国内激光雕刻切割控制器技术发展迅速,基于PC的传统控制器已相当成熟.为了显著提高工业生产效率,适应工业生产规模扩张的需要以及工业对系统稳定性要求的提高,目前国内几家专业运动控制器厂家已经实现了激光雕刻切割控制器的完全脱机运行.本文针对脱机控制器的需要设计一款人机交互设备,该设备采用AT89C55WD单片机为主控制器,采用标准的MODBUS协议实现HMI与脱机控制器的可靠通讯.     

激光雕刻系统中数据处理技术研究

近年来,激光雕刻技术受到越来越多的关注,FPGA数据处理是激光雕刻系统中的重要部分,数据检测提取负责雕刻中重要参数的提取,灰度功率匹配将灰度级和激光器输出功率建立线性关系,使得雕刻系统实现多灰度级的平滑雕刻。雕刻结果表明可以实现256级灰度雕刻,雕刻图像具有层次感。     

基于数字图像的数控雕刻技术研究*

通过对图像格式识别与输入、图像质量改善、图像边缘提取和增强,进行了基于图像的数控雕刻系统研究.着重研究了直接图像影像加工和图像边缘加工两种加工方法,给出了它们的具体思路和方法,并结合PC 运动控制器的开放式数控加工思路,研制了基于图像的数控雕刻系统,仿真和实际加工表明,该系统能够获得满意的加工效果.     

第十一届中国国际模具技术和设备展览会现代模具制造技术及设备评述

通过对第十一届中国国际模具技术和设备展览会中模具加工技术以及关键设备、刀具、测量仪器、模具的C如／CAE／CAM技术等的水平评述，介绍了现代模具制造技术的现状、特点和发展趋势。     

基于3D扫描技术的数控雕刻系统

本文介绍了一种基于3D扫描技术来实现先进高速雕刻的数控雕刻系统.即利用物体表面三维形状测量技术来获取实物模型表面的3D扫描数据,经计算机处理之后,存储为3D格式文件,再将该格式的文件转换成刀路NC格式文件,最后输入到数控雕刻系统的输入单元内雕刻出物体的3D模型.整个系统的软硬件自行设计搭建,并在文中给出了实例制作过程.     

基于机器视觉辅助测量的精密电火花刻伤方法与系统

传统电火花刻伤机在工作时只对电机动作进行反馈,刀片损耗带来的误差通常靠人为增加进给量进行补偿,难以保证刻槽的形状与尺寸公差。为了更精确地获得刻伤过程中的刀片损耗量,提升闭环控制的电机精度,提出了一种基于机器视觉辅助测量刀片损耗的电火花刻伤方法,并依此设计了一套刻伤系统。实验中使用该系统计算出的刀片损耗量和实际测量值的误差在±5μm以内,同时得到的刻槽实际测量深度与系统计算的刻槽深度的误差在±10μm内。     

朱仙镇木版年画的“天地人合”

朱仙镇木版年画2006年被首批公布为中国非物质文化遗产,历史悠久,具有独特的地域艺术风貌,折射着浑厚的中原文化底蕴。农业文明向工业文明转型的中国,朱仙镇木版年画已经面临消亡的窘迫局面。本文在田野调查的基础上,结合相关的前学文献运用系统工程的方法以朱仙镇木版年画的传统工艺流程为切入点,对年画中的"天地人合"进行阐述,对朱仙镇木版年画相关文献的完善和保护具有拾遗补漏的意义。     

DSP控制卡在高速数控雕铣机中的研究实现

分析了传统数控雕铣机运动控制系统的缺陷，针对基于DSP＋FPGA运动控制卡的特点，开发了一种高速度、高精度、高效率和高可靠性的数控雕铣机运动控制系统。同时将伺服驱动脉冲发生模块、码盘反馈信号处理模块、插补命令FIFO缓冲区、辅助命令FIFO缓冲区、状态缓冲区、DSP外部扩展存储区都集成在一块FPGA芯片上，这样大大地减少了外围电路的设计工作量，并增强了系统的可靠性和稳定性。谊系统已成功应用于8．5kw四轴数控雕铣机控制系统中，并且应用效果达到了设计目标。     

Preparation of the projectile rotating band and its performance evaluation

Alternative materials are being investigated as substitution of the traditional copper rotating band, in order to solve problems associated with their mechanical and physical properties. Meanwhile, new processes for joining the rotating band on the projectile body have also to be developed because of different material physical properties. In this paper, swaging, welding, and newly developed spraying technologies for fabricating rotating band are analyzed, respectively. Quasi-static and dynamic engraving methods are presented for evaluating the performance of as-prepared rotating band. The former was performed on an 810 Material Testing System and the latter was carried out by using a specially developed gas-gun-based impact test rig. Hoop and axial direction strain gauges were positioned on the exterior of the barrel to monitor the effect of the rotating band on the barrel during engraving process. It is suggested that aluminum bronze coating prepared by the High Velocity Arc Spraying (HVAS) process should be a good candidate for application to a rotating band of medium- and large- caliber projectiles. The measured strains were found to be dependent on a set of variables, such as loading rate, band material and structure, forcing cone and rifling (land and groove) structure, bore condition (oiled or dry), etc. The loading rate has been verified as the most important factor and the essential difference among quasi-static engraving, dynamic engraving, and actual firing.     

Line-based sunken relief generation from a 3D mesh

Sunken relief is an art form made by cutting the relief sculpture itself into a flat surface with a shallow overall depth. This paper focuses on the problem of direct generation of line-based sunken relief from a 3D mesh. We show how to extract, post-process and organize the messy feature lines in regular forms, applicable for lines engraving on the sculpture surfaces. We further describe how to construct a smooth height field from the input object, and derive a continuous pitting corrosion method to generate the cutting paths. The whole framework is conducted in object-space, making it flexible for stroke stylization and depth control of the engraving lines. We demonstrate the results with several impressive renderings and photographs used to illustrate the paper itself.