不锈钢钎焊管理信息系统的开发

用C＋＋计算机程序语言，在VisualC＋＋．Net调试环境中，利用MFC ODBC封装的类开发不锈钢钎焊管理信息系统，以SQL Server建立的不锈钢钎焊知识库／表作为后台数据库，用户通过人机界面链接后台数据库可以进行不锈钢钎焊知识的浏览、添加、删除、修改，并且将专家系统引入系统，以便系统在知识获取上具有智能性。     

不锈钢钎焊管理信息系统的开发

采用C 计算机程序语言,在Visual C .Net调试环境中,利用MFC ODBC封装的类开发不锈钢钎焊管理信息系统,以SQL Server建立的不锈钢钎焊知识库/表作为后台数据库,用户通过人机界面链接后台数据库可以进行不锈钢钎焊知识的浏览、添加、删除、修改,并且将专家系统引入系统,使系统在知识获取上具有智能性.     

制造信息系统自组织过程及其描述方法

根据制造信息系统的特点,提出制造企业复杂信息系统自组织过程框架结构,定义制造信息系统的宏观序参数,对多个序参量影响下的制造系统目标分解、序参量变化及相互作用过程进行数学描述。通过映射耦合函数的建立,使用二叉树遍历的思想阐述用双向输出自动机构造的接口Agent在自组织过程中的作用。以降低生产成本为例对制造信息系统自组织过程及对系统状态的影响做进一步分析。     

无损检测人员考试题库管理信息系统的设计与实现

结合管理信息系统的理论，运用面向对象的程序设计技术，在Windows操作环境下，选择Microsoft Access2000为支持数据库、Visual Basic6.0语言作为编程工具，成功地设计、开发了无损检测人员考试题库的管理信息系统。     

无损检测授证人员管理信息系统的设计与实现

根据航空工业无损检测人员资格认证工作的实际情况和发展要求，从有效利用信息资源和提高行业管理水平的角度阐述了建立航空无损检测授证人员管理信息系统的必要性和紧迫性；确定了系统工作目标，进行了子系统功能划分及设计；在Windows操作环境下，选择以Mi-crosoft Access2000为支持数据库、以可视化的Visual Basic6.0语言作为编程工具，成功地设计、开发了授证人员管理信息系统。     

平整机楔块的加工

内应力、切削热和工艺系统误差是影响平整机楔块加工精度的主要因素，采取粗加工后调质，半精加工后时效以及强制冷却和提高工艺系统精度等措施可有效地解决这些问题。     

面向流程企业的结构化系统分析研究

系统分析是管理信息系统开发的关键步骤 ,结合一个实际的管理信息系统 (长电管理信息系统 ) ,采用结构化的系统分析方法 ,提出了实用的系统分析框架 ,为系统设计和系统开发打下了坚实的基础。     

Real time monitoring and diagnosis system development in turning through measuring a roundness error based on three-point method

A real time monitoring and diagnosis system to measure spindle center displacement (roundness error) during turning operation is introduced in this paper. The system was developed based on the three-point method. The error generated during cutting process was monitored and diagnosed by using a system equipped with a designed DSP (Digital Signal Processor) board and FFT (Fast Fourier Transform) algorithm. The system could estimate cutting force and predict other cutting characteristics such as chattering and tool wear. Using the spindle center fluctuation, i.e. a roundness error movement from the center, the relationship between the cutting force and the roundness error could also be investigated. The roundness error that eliminated geometric shape error and eccentric error from the measured signals in the frequency domain proved to be a dominating factor in determining cutting characteristics.     

WWW与选矿MIS数据库的集成

介绍了WWW与MIS数据库的连接技术,及在选矿厂管理信息系统中的应用,为矿山、企业建立基于Intranet的MIS系统奠定了基础,提供了实现的方法,可供建造同类系统时借鉴。     

飞机蒙皮镜像加工变形迭代预测方法

飞机蒙皮尺寸大、壁厚小,易发生加工变形,并且切削力与加工变形之间存在着复杂的耦合关系,普通的无迭代加工变形预测方法难以实现较好的预测效果。针对飞机蒙皮镜像加工变形现象,在建立镜像铣定制刀具切削力模型的基础上,提出一种加工变形迭代预测方法,该方法较好地解决了切削力与加工变形之间的复杂耦合关系问题,并通过仿真和试验证明了该方法的有效性。相对普通无迭代预测方法,该方法预测加工变形量的变化趋势和变化幅值更符合实际蒙皮镜像加工,加工变形仿真预测值与实际加工变形的差值更稳定,预测误差更小,可以更准确有效地预测出蒙皮镜像加工变形量。     

铝合金超声振动切削实验研究

利用自行设计的20 kHz超声振动切削系统,在不同的切削速度下,对航空硬铝(7075)进行非传统式的普通切削和振动切削对比试验。试验结果表明:振动切削的加工效果明显优于普通切削,振动切削存在一个最佳切削速度,振动切削加工的切削力明显小于普通切削加工,振动切削在加工过程中更加平稳。     

Development of foolproof catheter guide system based on mechatronic design

Minimally invasive surgery (MIS) is a less invasive procedure compared to traditional open surgery. It usually involves laparoscopic devices and remote control manipulation instruments comprising an endoscope for indirect observation of the surgical field. Interventional radiology (IVR) is one of the MIS methodologies. The IVR procedures include diagnosis such as angiograms, and treatment. The IVR procedures use small tubes called catheters, which are inserted through the body cavity or blood vessel to the treatment area. The IVR procedures lead to the risk of X-ray exposure to surgeon since the procedures is using the digital subtraction angiography device to get clear image of the patient blood vessel. Therefore, we have developed a foolproof tele-operated system to guide the catheter. Hence, the reliability in IVR procedure is crucial. The system is based on a mechatronic design methodology characterized by a principle solution specified in CONSENS^® (CONceptual design Specification technique for the ENgineering of complex Systems). This principle solution serves as a basis for the first analysis and verification on the system level. Further, the proposed concept of control system can also be re-used in the other foolproof guidance systems.     

区域企业集群中产品设计和管理模式探讨

在对我国沿海地区企业集群进行深入调查研究的基础上,提出利用多级分布式计算机系统建立企业局域网络,并将CAD、MIS系统集成到企业局域网络中以便企业集群可以共享,使得生产相同或相似零件族的柔性制造系统可直接从集成系统获得生产数据,从而大大提高企业集群的生产效益。本文阐述了一个基于UG环境下的智能化的CAD、MIS系统集成模式。     

现代制造企业对制造信息系统的需求与发展问题研究

分析了在市场环境发生变化的情况下，现代制造企业对信息技术的实际需求及其制造信息系统存在的主要问题，探讨和研究了现代制造业对信息技术的实际需求及其发展趋势与特征，旨在为企业适应新的生产管理和组织模式，构建新一代制造信息系统的软件开发集成平台，进一步促进制造企业实现网络化集成产品的开发与制造奠定基础。     

Development of a virtual machining system, part 3: cutting process simulation in transient cuts

In Parts 1 and 2 of this three-part paper, a mechanistic cutting force model was developed and machined surface errors for steady cuts under fixed cutting conditions were predicted. The virtual machining system aims to simulate and analyze the machining and the machined states in a general flat end-milling process. This frequently involves transient as well as steady cuts. Therefore, a method for simulating the cutting process of transient cuts needs to be developed to realize the virtual machining system concept. For this purpose, this paper presents a moving edge-node (ME) Z-map model for the cutting configuration calculation. The simulation results of four representative transient cuts in two-dimensional pocket milling and an application of off-line feed-rate scheduling are also given.

In transient cuts, the cutting configurations that are used to predict the cutting force vary during the machining operation. The cutting force model (Part 1) and surface error prediction method (Part 2) were developed for steady cuts; these are extended to transient situations using the ME Z-map model to calculate the varying cutting configurations efficiently. The cutting force and surface errors are then predicted. To validate the feasibility of the proposed scheme, the measured and predicted cutting forces for transient test cuts were compared. The predicted surface error maps for transient cuts were constructed using a computer simulation. Also, off-line feed-rate scheduling is shown to be more accurately performed by applying the instantaneous cutting coefficients that were defined in Part I.     

Plate insertion as a means to improve the damping capacity of a cutting tool system

Effective chatter prevention during cutting operations is achieved by increasing the damping capacity of a cutting tool system. It is well known that damping capacity is generated through (i) micro-slip at the interface between the tool shank and tool post, (ii) slip at the grain boundary within a vibrating body (that is, internal friction), and (iii) friction between the surface of the vibrating body and the surrounding air. Among these three causes of damping capacity, micro-slip at the interface between the tool shank and tool post is the greatest factor affecting the damping capacity of the cutting tool system. In the research investigation, it is shown that the damping capacity of a cutting tool system is improved by friction acting between the inner wall of a rectangular hole made at the overhanging shank of the cutting tool system and the surface of a plate inserted into this rectangular hole. The damping capacity improvement proposed in this paper is realized by a mechanism similar to the inner friction mechanism.     

CAPP环境下的切削用量优化研究

切削加工工艺参数的选择对提高生产率、加工质量、经济效益等各方面具有重要的作用,针对当前CAPP系统中切削用量的优化仍存在着优化方法复杂、低效、容易收敛于局部最优解等问题,本文引入遗传算法思想,以优化CAPP环境下的切削加工工艺参数,克服应用传统优化方法的缺陷。     

Noncircular cutting on a lathe using tool position and differential motor current

In this paper, noncircular cutting on a lathe (NCL) using the signals of tool position and differential motor current is developed. First, a neural-network is used to learn a weighted combination of tool position and differential motor current of a voice coil servomotor system (VCSS). The differential motor current is achieved from the difference between motor current under real cutting and that under air cutting. Then a nonlinear inverse control based on the learned model is designed to obtain an acceptable cutting error. Although the nonlinear inverse control is accomplished from the consideration of tool position under real cutting, its performance cannot be ensured as the NCL is subjected to the uncertainties (e.g. noise, different cutting conditions, aging of system components). Under these circumstances, a fuzzy sliding-mode control is then synthesized with the previous nonlinear inverse control to reduce the cutting error. The experimental results of NCL using the proposed control including profile error of finished workpiece and surface roughness of finished workpiece, are better than those without the consideration of motor current.     

Indirect cutting force measurement in multi-axis simultaneous NC milling processes

There have been many research works for the indirect cutting force measurement in machining process, which deal with the case of one-axis cutting process. In multi-axis cutting process, the main difficulties to estimate the cutting forces occur when the feed direction is reversed. This paper presents the indirect cutting force measurement method in contour NC milling processes by using current signals of servo motors. A Kalman filter disturbance observer and an artificial neural network (ANN) system are suggested. A Kalman filter disturbance observer is implemented by using the dynamic model of the feed drive servo system, and each of the external load torques to the x and y-axis servo motors of a horizontal machining center is estimated. An ANN system is also implemented with a training set of experimental cutting data to measure cutting force indirectly. The input variables of the ANN system are the motor currents and the feedrates of x and y-axis servo motors, and output variable is the cutting force of each axis. A series of experimental works on the circular interpolated contour milling process with the path of a complete circle has been performed. It is concluded that by comparing the Kalman filter disturbance observer and the ANN system with a dynamometer measuring cutting force directly, the ANN system has a better performance.     

基于BP神经网络L M优化算法的喷液式线切割工艺参数优化

为了解决大能量切割时常因放电极间供液不足而出现干切和断丝的现象,提出在工作液高压浇注供液方式的基础上,增添跟踪喷液辅助系统。该系统可减少或消除供液喷嘴与切割表面间的喷液流失,提高工作液的极间进入量和极间平均流动速度,进而改善极间放电条件。在搭建的喷液系统上进行了正交优化试验,研究了功放管数、脉冲间隔、切割厚度、脉冲宽度、运丝速度等因素对切割效率的影响,确定了线切割优化工艺参数,获得了200 mm~2/min以上切割效率。借助L-M优化算法的BP神经网络搭立了线切割加工工艺网络预测模型,预测精度较高,为跟踪喷液式高速走丝线切割机的高效切割提供了可靠的工艺参数预测模型,满足实际加工需要。