一种新的制造技术──无夹具制造

提出了无夹具制造的概念和“固定一寻位一加工”的制造模式。给出了实现无夹具制造的信息流模式。控制方法以及系统实现中关键问题的方案。介绍了试验系统及试验结果。理论分析与试验结果表明，所提出的无夹具制造技术是可行的。     

智能寻位加工技术中一种新的寻位方法

智能寻位加工中的关键技术是工件寻位。文章对现有的工件寻位方法进行了分析,指出了它们的优缺点,并在此基础上提出了一种适合常规工件寻位的新方法,实验证明这种方法简洁实用,能够应用到寻位加工系统中去,实现常规工件的敏感制造。     

解析表面零件的寻位算法

阐述解析表面零件的寻位加工问题的一种新寻位方法。该方法根据传感装置获取的工件特征信息建立零件表面方程 ,然后以递阶方式快速求取旋转变换矩阵和平移变换矩阵 ,最后通过集成求解出工件的实际状态 ,并据此实现对工件的位姿自适应加工。实际加工结果表明 ,所提出的方法具有良好效果。     

无基准工件封装夹具的发展与应用

夹具的发展与制造系统的发展是同步进行的。介绍了无基准工件封装夹具的基本概念，方法和应用，进一步分析了该封装技术的优点和局限性，讨论了一种基于通用寻位元件的主动寻位方法及其工件安装技术，介绍了快速寻位和状态记忆爱用夹具的研制情况，实践表明，这种夹具的有效地解决了任意形状工件，在通用夹具中的定位，刀具自由进入工件定位表面进行切削加工的填料浇注时的毛坯漂移等问题。     

快速寻位与状态记忆的工件安装技术与新型夹具系统

介绍国内外关于基于状态变化的工件安装技术的研究动态,提出并研制了快速寻位与状态记忆的通用夹具系统,阐述该来具系统的基本原理、主要组成和工作流程及用于生产实际的关键技术,给出了部分工程应用的结果。     

自由曲面零件的寻位自适应检测方法研究

针对复杂曲面零件检测过程中难以准确定位和测量效率低的问题，提出自由曲面零件的寻位自适应检测这一新的方法。对该方法所涉及的曲面零件的自动寻位、测的自适应生成和基于寻位信息的位姿自适应检测控制等关键问题给出了可行的解决办法。在此基础上开发了曲面零件寻位自适应检测软件并进行了仿真验证。理论分析与实验结果表明，所提出的方法是可行的，为复杂自由曲面零件的无定位检测开辟了一条新的有效途径。     

大范围工件寻位问题的递阶求解方法

为解决大范围工件寻位这一难题,研究出宏微观相结合的递阶寻位方法。该方法利用先进智能传感技术,以无接触方式快速获取工件宏观位姿信息,并以此引导微观精确测量过程获取工件关键特征的精确信息,最后通过基于现代数学理论的快速算法准确求解出工件的实际状态,实验结果表明,所提出的方法具有良好的应用效果。     

快速高效加工半圆形工件的夹具

在车床上加工完整的圆柱体是常见的,但要在车床上加工半圆形工件就比较困难。如图1所示的摩托车零件——刹车蹄块,此件尺寸φ200(?)mm及φ14(?)mm都是半圆形,这样的工     

车制方形工件内孔的通用夹具

车床加工方形工件内孔,一般都用4爪单动卡盘调正中心,这种方法对于批量生产和精度要求较高的工件很不合适。我公司是液压阀主要生产供应商之一,其中阀体零件绝大多数是方形,以往一直采用专用夹具加工。近年来,新产品开发更新快,如果再采用一种规格一副夹具,夹具数量多,给生产和管理带来诸多不便。为此,我们根据成组理论设计制作了一种通用夹具。目前,     

非传统工件安装技术与通用夹具系统的研究

介绍了传统安装技术研究的状况,提出并设计了一种基于材料状态变化的通用夹具－主动寻位与状态记忆－ＩＬ＆ＳＭ（Ｉｎｉｔｉｌ Ｌｏｃａｔｉｏｎ ＆ Ｓｓｔａｔｅ Ｍｅｍｏｒｙ）夹具系统。讨论了夹具的基本原理、主要组成,研究了ＩＬ＆ＳＭ夹具工业化的关键技术并以典型工件为对象,进行了工程验证。     

面向知识经济时代现代制造模式的比较研究

分析制造业面临的新环境,对各种现代制造模式从多方面进行分析与比较,探讨面向知识经济时代现代制造模式的发展趋势,提出了我国制造业的发展策略。     

Configuration Selection for Reconfigurable Manufacturing Systems by Means of Characteristic State Space

The configuration selection for reconfigurable manufacturing systems(RMS) have been tackled in a number of studies by using analytical or simulation models. The simulation models are usually based on fewer assumptions than the analytical models and therefore are more wildly used in modeling complex RMS. But in the absence of an efficient gradient analysis method of the objective function, it is time-consuming in solving large-scale problems by using a simulation model coupled with a meta-heuristics algorithm. In this paper, a new approach by means of characteristic state space is presented to improve the efficiency of the configuration selection for an RMS. First, a characteristic state equation is set up to represent the input and the output resources of each basic activity in an RMS. A production process model in terms of matrix equations is established by iterating the equations of basic activities according to the resource flows. This model introduces the production process into a characteristic state space for further analysis. Second, the properties of the characteristic state space are presented. On the basis of these properties, the configuration selection in an RMS is considered as a path-planning problem, and the gradient of the objective function is computed. Modified simulated annealing(SA) is also presented, in which neighborhood generation is guided by the gradient to accelerate convergence and reduce the run time of the optimization procedure. Finally, several case studies on the configuration selection for some actual reconfigurable assembly job-shops are presented and compared to the classical SA. The comparison shows relatively positive results. This study provides a more efficient configuration selection approach by using the gradient of the objective function and presents the relevant theories on which it is based.     

Holonic Concept Based Methodology for Part Routeing on Flexible Manufacturing Systems

A flexible manufacturing system (FMS) is designed to achieve good productivity and low cost. The success of an FMS depends largely on effective production scheduling and control. However, it has been found that current manufacturing scheduling and control algorithms lack the flexibility to handle interruptions or resource breakdowns; hence, system performance drops dramatically and abruptly when interruptions occur. This research develops a computer-simulation-based framework of FMS scheduling and control system using the holonic concept. This framework can maintain stability and flexibility while accommodating system disturbance, increase throughput, reduce part flow-time and work-in-process inventory, and balance workload among identical workstations. The significance of this research is the investigation of an innovative approach to revolutionary advances of control technologies for advanced manufacturing systems, and to the revitalisation of control and scheduling algorithms used by existing FMSs. A case study has been provided to substantiate the effectiveness of this proposed framework.     

一种可重构制造系统的生产计划方法

虚拟企业是实现敏捷制造的有效途径，是一种可重构的制造系统。系统在重构过程中，各合作伙伴给出完成各自任务的时间段，制造系统则基于这些信息编排出生产计划。本文建立了这一生产计划问题的数学模型，基于该模型，提出了一个有效算法，并给出了一个简单算例。结果表明，所提出的算法可以决定解的存在性，如果解存在，则求出有效解；如果解不存在或解不可以接受，盟主可与合作伙伴协商解决问题。     

A New Approach to Fuzzy Part-Family Formation in Cellular Manufacturing Systems

Group technology (GT) is one of the major issues in successful implementation of cellular manufacturing systems. The success of GT implementation depends only on an effective formation of part-families. The effective formation of part-families depends mainly on an effective formation of a similarity coefficient measure. Many similarity coefficients have been produced over the past three decades, but better similarity coefficient measures are required. The decision-making process in a manufacturing system often involves uncertainties and ambiguities. Under such circumstances, fuzzy methodologies have proved to be effective tools for taking fuzziness into consideration. In this paper, we use fuzzy cluster analysis to form part-families and assign parts to existing part-families. We have established a new approach to convert a fuzzy clustering matrix into a zero-one incidence matrix. We have also developed a new similarity coefficient measure and this coefficient measure is used to form a part-family. A mathemat-ical model that uses this similarity coefficient for solving optimally the part-family formation problems in cellular manufacturing is developed. Finally, it is compared with other models by giving an illustration with a numerical example.     

A framework for capacity planning and machine configuration in flexible assembly systems

We consider the problem of simultaneously determining the number of machines (and/or workers), the assignment of tasks (and related tools and components) to these machines, and the number of jobs circulating in a flexible assembly system (FAS), to satisfy steady-state throughput requirements for a family of similar products at minimum cost. We focus on situations where there are precedence relations among the various tasks, as is common in assembly systems. We present a framework for solving this problem based on a heuristic decomposition approach which involves the solution of only a few types of sub-problems. We demonstrate the efficiency and effectiveness of the overall procedure using a number of example problems.     

叶片类零件的计算机辅助工装设计系统

针对叶片类零件的特点及需求 ,开发了航空发动机典型零件—叶片的计算机辅助工装设计系统。分析表明 ,叶片类零件虽然形状复杂 ,但其分类明确 ,同类零件间有较大的相似性 ,可以在成组技术的基础上进行工装的修改设计 ,缩短设计周期。为提高出图效率、避免重复绘制、便于参数化设计 ,建立了用户可自行扩充的标准件和通用件库。为便于检索查询和图纸文档的统一管理 ,开发了基于 PDM产品的工装图纸文档管理系统     

叶片类零件的it算机辅助工装设计系统

针对叶片类零件的特点及需求,开发了航空发动机典型零件-叶片的计算机辅助工装设计系统。分析表明,叶片类零件虽然形状复杂,但其分类明确,同类零件间有较大的相似性,可以在成组技术的基础上进行工装的修改设计,缩短设计周期。为提高出图效率、避免重复绘制、便于参数化设计,建立了用户可自行扩充的标准件和通用件库。为便于检索查询和图纸文档的统一管理,开发了基于PDM产品的工装图纸文档管理系统。     

中小型制造企业信息化现状调研与发展对策

介绍了浙江省中小型制造企业信息化建设的调研情况，在比较国内外应用情况后，指出了存在的问题，提出了公共信息资源体系、投融资环境、社会培训咨询体系、基于ASP的公共应用平台、信息化示范工程、政策法规、企业信息化应用、中小企业信息化人才队伍等方面的对策建议。     

SMT产品组装生产系统的组成与控制

介绍了印制板级电子电路模块表面组装生产系统的组成与控制技术,并对其技术的研究现状和发展动态进行了阐述。