数控车床刀尖圆弧半径补偿的应用及分析

本文以数控加工中,数控车床刀尖圆弧半径补偿在实际加工中的应用进行分析,通过分析数控车削加工过程中刀尖圆弧半径的影响,列出在不同情况下对实际加工精度影响。给出了在各种不同加工情况下出现误差的应对方法。     

加工中心刀具半径补偿技术

本文着重介绍刀具半径补偿的概念。主要对刀具半径补偿功能在解决粗、精加工方面的灵活应用进行了深入的探讨。讨论在通常的加工中如何实现刀具半径的补偿。以及运用刀具半径补偿给加工带来的便利。并通过具体的例子进行比较详细的阐述。     

坐标变换编程在数控加工中的应用

本文主要介绍了数控程序编制的基本步骤，并以此为基础详细阐述了坐标变换编程的方法与技巧，希望对相关编程人员有一定的帮助和借鉴作用。     

基于数控加工中心中刀具补偿和过切现象的分析

本文将阐述数控加工中刀具的补偿功能,分析在数控铣加工过程中的几种常见的过切原因,提出了防止过切现象的有效措施。刀具半径补偿是数控机床的一种特殊功能。合理地使用能极大地方便零件加工程序的编制,特别是在二维加工编程时,不需考虑加工时刀具实际直径的大小。按被加工零件的实际轮廓轨迹进行编程,在程序中启用刀具半径补偿功能,就可以加工出符合技术要求的零件。同时刀具补偿功能还可以同一加工程序实现零件的粗加工、半精加工、精加工,简化程序编制,节省加工前的准备时间,提高了生产效率,降低技术人员的劳动强度,避免过切现象的发生,从而减少经济的损失。     

“华中”系统数控车削G71指令的编程技巧

在数控编程和数控实训教学过程中从学生应用G71指令经常出现错误问题出发,探讨了G71指令在编程中的技巧,力求通过建立的编程模板,让学生能够准确应用G71指令,保证了零件加工的尺寸精度（加工精度）和安全问题。     

“R”参数编程在数控加工中的运用

数控机床是先进制造技术的基础设备,是典型的机电一体化产品。掌握数控编程技术是充分利用好这类装备的关键,也是我们提高数控加工工程训练教学水平的重要标志。     

基于Delcam软件在数控加工中的应用

数控加工技术已得到广泛应用。如数控铣削、镗削、车削、线切割、电火花加工等。为了使数控设备达到预期的加工效果。编制高质量的数控加工程序是必不可少的。利用Delcam软件中的Power Shape模块建立零件的几何模型。利用Power Mill模块可以交互式地模拟演示材料按数控刀轨数据被去除的过程,可迅速自动生成数控G代码。缩短编程人员的编程时间,提高程序的正确性和安全性。降低生产成本。提高工作效率。     

数控加工中精度的控制

数控加工过程中不可能做到加工零件时一点偏差都没有,但要保证在控制范围内,如何做到了,本文通过内部和外部因素作了简要的分析,同时根据影响因素提出了相应的解决措施,来提高加工过程中的精度.     

不等深螺杆的数控加工

不等深螺杆目前正被广泛用于塑料挤出机，但其加工精度要求高。本文介绍了不等深螺杆的基本结构、加工工艺流程及参数、绘制展开线的方程及步骤。最后介绍了不等深螺杆数控加工的编程技巧及部分程序，以及加工时的注意事项。     

浅谈数控电火花加工的编程

介绍了数控电火花加工编程方法的要点，在编程中的一些使用技巧及注意事项。     

Iterative identification of temperature dynamics in single wafer rapid thermal processing

As the standard size of silicon wafers grows and performance specifications of integrated circuits become more demanding, a better control system to improve the processing time, uniformity and repeatability in rapid thermal processing (RTP) is needed. Identification and control are complicated because of nonlinearity, drift and the time-varying nature of the wafer dynamics. Various physical models for RTP are available. For control system design they can be approximated by diagonal nonlinear first order dynamics with multivariable static gains. However, these model structures of RTP have not been exploited for identification and control. Here, an identification method that iteratively updates the multivariable static gains is proposed. It simplifies the identification procedure and improves the accuracy of the identified model, especially the static gains, whose accurate identification is very important for better control.     

Model predictive control of condensate recycle process in a cogeneration power station: Controller design and numerical application

A model predictive control (MPC) system has been developed for application to the condensate recycle process of a 300 MW cogeneration power station of the East-West Power Plant, Gyeonggido, Korea. Unlike other industrial processes where MPC has been predominantly applied, the operation mode of the cogeneration power station changes continuously with weather and seasonal conditions. Such characteristic makes it difficult to find the process model for controller design through identification. To overcome the difficulty, process models for MPC design were derived for each operation mode from the material balance applied to the pipeline network around the concerned process. The MPC algorithm has been developed so that the controller tuning is easy with one tuning knob for each output and the constrained optimization is solved by an interior-point method. For verification of the MPC system before process implementation, a process simulator was also developed. Performance of the MPC was investigated first with a process simulator against various disturbance scenarios.     

基于Profibus总线的薄板坯连铸用耐火材料的原料加工控制系统

结合薄板坯连铸用耐火材料原料加工生产线的应用实例,介绍了Profibus总线的硬件配置、系统组态等。基于Profibus总线的原料加工控制系统投入运行后,有效地解决了薄板坯连铸用耐火材料生产线的连续化、一致化、智能调节等问题,极大地提高了生产效率,保证了混料的稳定性。