数控加工仿真系统的研究与应用

介绍数控加工仿真系统的整体设计,提出格栅voxel三维实体建模方法,刀具扫描体的生成算法,实现了刀具切削工件过程的动态仿真,并对碰撞检查算法进行了初步的研究.基于以上方法,建立了蓝天数控系统的加工仿真系统,在加工前对加工程序进行验证,在加工时对刀具轨迹的执行、工件的切削过程等进行实时监控.     

STEP-NC based high-level machining simulations integrated with CAD/CAPP/CAM

With the development of manufacturing,numerical control(NC) machining simulation has become a modern tool to obtain safe and reliable machining operations.Although some research and commercial software about NC machining simulations is available,most of them is oriented for G&M code.It is a low-level data model for computer numerical control(CNC),which has inherent drawbacks such as incomplete data and lack of accuracy.These limitations hinder the development of a real simulation system.Whereas,standard for the exchange of product data-compliant numerical control(STEP-NC) is a new and high-level data model for CNC.It provides rich information for CNC machine tools,which creates the condition for an informative and real simulation.Therefore,this paper proposes STEP-NC based high-level NC machining simulations solution integrated with computer-aided design/computeraided process planning/computer-aided manufacturing(CAD/CAPP/CAM).It turned out that the research provides a better informed simulation environment and promotes the development of modern manufacturing.     

数控加工仿真技术研究综述

数控加工仿真技术可以形象、直观地模拟数控加工的全过程,为验证数控加工程序的可靠性及预测切削加工过程提供了强有力的工具。介绍了数控加工仿真的关键技术——几何仿真技术、物理仿真技术和图像可视化技术,并分别对此3个数控加工仿真关键技术的研究成果进行分析评述,最后提出了数控加工仿真技术的发展趋势。     

基于仿真技术的数控实验平台构建及应用

利用计算机图形学技术仿真数控加工系统，无论是在实验教学还是在生产培训上，都越来越受到重视。针对初次操作数控机床的学生培训事故率高、对机床刀具设备损坏大、教学培洲效率低的状况，构建基于仿真技术的数拧实验平台来进行数控教学和培训。介绍了数控仿真系统的应用原理、构建要素以及数控加工过程的动态图形仿真技术。结合零件加工实例阐述了数控仿真实验平台的运行过程。实例表明，数控仿真技术的应用，提高了学生的数控编程能力、数控机床操作能力以及数控系统的维护能力。     

基于Java及PS/2协议的数控仿真平台

数控加工技术是机械类工科大学生必备的专业技能之一,但由于资源的缺乏及安全的考虑,受培训者实际动手操作的机会有限,教学效果不佳.数控仿真很好地解决了上述问题.文中以数控车床为主要研究对象,给出了切削加工的简单运动学模型和力学模型及Java语言的程序实现,取得了具有真实感的仿真效果.同时基于PS/2协议开发了数控车床的仿真面板,并实现仿真程序与仿真面板的连接.开发出跨平台（cross platform）、即插即用（plug and play）具有真实感的数控车床仿真教学平台.     

三维虚拟加工环境及其关键技术的研究

在分析虚拟制造特点的基础上,提出了三维可视化虚拟加工环境的系统结构,介绍了支持三维建模仿真的组件设计、基于装配模型的三维实体建模方法、NC代码解析器的设计方案以及基于毛坯表面三角片离散化的加工过程仿真算法,并开发了虚拟加工环境原型系统,该系统能够实时地反映零件虚拟原型的加工成形过程仿真,并进行可加工性分析。     

基于OPENGL数控仿真软件的开发

利用计算机图形技术对已编制的数控程序进行加工过程模拟演示,不但可以检验数控程序的正确性和合理性,而且大大降低了以往采用工艺试切方法所带来的高消耗和高成本.本文对数控仿真建模和数控加工仿真实现技术进行了深入的研究.     

关于叶轮集成化智能CAM系统的研究

针对叶轮五坐标ＣＡＭ技术，本文在统一的产品信息模型基础上， 运用智能工程技术，建立了一个并行分层式集成化ＣＡＭ系统，此系统可有效地解决叶轮零件的图形输入，几何设计、叶片及叶轮的造型、曲线及曲面求交、加工刀心轨迹的求解等，并以ＤＮＣ方式控制数控机床进行加工，实现了软硬件的集成。     

A multi-regional computation scheme in an AR-assisted in situ CNC simulation environment

Computer numerical control (CNC) simulation systems based on 3D graphics have been well researched and developed for NC tool path verification and optimization. Although widely used in the manufacturing industries, these CNC simulation systems are usually software-centric rather than machine tool-centric. The user has to adjust himself from the 3D graphic environment to the real machining environment. Augmented reality (AR) is a technology that supplements a real world with virtual information, where virtual information is augmented on to real objects. This paper builds on previous works of integrating the AR technology with a CNC machining environment using tracking and registration methodologies, with an emphasis on in situ simulation. Specifically configured for a 3-axis CNC machine, a multi-regional computation scheme is proposed to render a cutting simulation between a real cutter and a virtual workpiece, which can be conducted in situ to provide the machinist with a familiar and comprehensive environment. A hybrid tracking method and an NC code-adaptive cutter registration method are proposed and validated with experimental results. The experiments conducted show that this in situ simulation system can enhance the operator’s understanding and inspection of the machining process as the simulations are performed on real machines. The potential application of the proposed system is in training and machining simulation before performing actual machining operations.     

复杂零件数控加工的仿真与优化研究

复杂零件数控代码繁多,采用人工检测、试切和机床运行的代码检测方法将造成极大的资源浪费。为了减小这方面的浪费及提高复杂零件加工的质量,本文以减速器中的典型零件产品为例,在Vericut里面建立三轴加工环境及方针模型,对数控代码进行仿真。通过仿真,优化了数控代码,精确模拟出实际的加工过程,直观地观察到刀具的轨迹和工艺的可加工性,为复杂零件的高效数控加工提供了借鉴。