一种新型组合式钟罩气体标准装置的研制

针对钟罩式气体标准装置使用过程中的不足之处,设计出一种新型组合式钟罩气体标准装置;从装置的三点创新性核心阐述了该装置的优越性;给出了新型组合式钟罩装置,以及传统正吹法、反吹法的实验数据,可印证该装置的准确性,给出新型组合式钟罩装置的连接图,对与现有技术相比较得出的不同处进行了剖析,为高效、可靠地开展气体流量计检定工作打...     

新型组合式支吊架在建筑安装工程中的应用

本文通过与传统支吊架的对比，介绍了新型组合式支吊架的优点，以及国内新型组合式支吊架的应用和生产情况，并且结合我国建筑业发展趋势和前景展望了新型组合式支吊架的应用前景和市场潜力。     

笔记本电脑纸浆模塑衬垫的对比试验

以HP V3172 TU笔记本电脑为例,设计制作了组合式和单层纸浆模塑缓冲衬垫,并进行了初步的对比试验.结果表明,由于具有双层结构,整体缓冲面积增大,组合式衬垫的最大响应加速度是单层衬垫的80%,因而组合式衬垫的缓冲效果优于单层衬垫.     

组合式空调装置CAD

阐述了利用ActiveX自动化二次开发方法在AutoCAD下对组合式空调装置进行计算机辅助设计的方法，组合式空调装置CAD系统可根据用户的要求进行设计计算，并还能给出满足设计要求的各个功能段体的图形及最终的装配图。     

某空投装备在不同缓冲装置下的冲击响应分析

为给空投装备提供理想的缓冲装置,在利用相关等效理论对不同缓冲装置进行合理等效的基础上,应用ABAQUS软件建立了某空投装备的有限元模型,分析了该空投装备在不同缓冲装置下的着陆冲击响应。根据破损边界理论,对比分析了不同缓冲装置的缓冲性能。根据分析结果提出了组合式缓冲装置的构想,并对其进行了仿真分析。仿真结果表明:组合式缓冲装置较其余2种缓冲装置具有较好的缓冲性能。     

组合式煤层浅孔注水封孔器连接装置改造技术

采煤作业是一个产尘的过程，为解决煤尘带来的危害，我矿采取的措施是对煤层进行浅孔注水。但是以往煤层浅孔注水都是单人操作单个注水胶囊（附图一），存在着注水效率低、用工多、需频繁操作等弊端。为此我们采用钢丝编织液压胶管总成、三通、注液阀、“u”卡、球形截止阀等材料制作了组合式煤层浅孔注水封孔器连接装置（附图二）。     

工业用组合式距离和表面轮廊测量系统—欧洲计划

工业用组合式距离和表面轮廊测量系统—欧洲计划ＦＤＯＣＣｈｉＯ等一、前言本文概述本实验室开发的组合式电一光装置的实验结果。它属于欧洲计划“自动生产过程计量”范畴，由欧共体通过欧共体标准局（ＢＣＲ）提供基金。本文涉及以下几个课题的设计、研制、特性表征和集...     

基于可视化的组合式空调机组运行仿真系统

为达到方便分析、检验组合式空调机组设计的准确、安全及合理性,节省样机制作和运行实验费用,缩短设计周期,修改和完善产品设计的目的,文章从系统结构设计及主要功能、仿真模型的建立、建立开放型数据库和图形库、系统运行仿真可视化等方面,介绍在微机上基于可视化的组合式空调机组运行仿真系统的研究成果,并通过一个实例验证了软件系统应用的有效性。     

焦化加热炉空气预热器振动及减振

焦化装置组合式空气预热器试运行时产生强烈振动，对组合式空气预热器产生振动的原因进行分析，卡门涡流是预热器产生振动的主要原因。提出合理的消振方案，通过改造，该预热器消除了振动，恢复了正常的运行。     

组合式U型锅体振幅运动机构的设计

组合式U型锅体主要用于饮品和药材的成型和干燥,其运动形式直接影响被加工物料的条索、含水量和味道,现有的组合式U型锅体大多采用偏心轮驱动滑块带动锅体往复运动.利用SIMPACK和Matlab软件仿真计算和模拟试验,基于运动学和运动轨迹分析,设计了一种新型优化的U型锅体装置--摆动振幅机构,这种机构能够更好地实现锅体对物料的整形加工.     

Optimising part feeding in the automotive assembly industry: deciding between kitting and line stocking

In a synchronous and fast-paced assembly line operation, it is crucial that the right parts are being supplied at the right time and at the right place. In automotive assembly, the need for efficient material handling part delivery is particularly great because of extensive product customisation and the lack of space to stock all the required parts at the assembly line. This paper introduces a mathematical cost model for evaluating the assignment of parts to one of two possible material supply systems: kitting or line stocking. Case data from an automotive company in Belgium is used to test the model. The results demonstrate that hybrid policies, where some parts will be kitted while others will be stocked in bulk at the line, are preferred to the exclusive use of either material delivery system. The factors influencing the preferred delivery method for individual parts are explored. Numerical results are presented.     

A Monte Carlo simulation based heuristic procedure for solving dynamic line layout problems for facilities using conventional material handling devices

A simple procedure is proposed to identify line layout solutions when a production facility with work centres of unequal size uses conventional material handling devices and operates under stochastic demand scenarios. The procedure uses Monte Carlo simulation (MCS) to empirically search for robust solutions defined as those that simultaneously meet minimum material handling cost performance levels across all demand scenarios. The results reported in this study suggest that ‘robust’ line layout solutions can be identified using a modest volume of random sampling. The procedure and results are demonstrated through a series of sample problems.     

船舶内部物流转运系统仿真

由于船舶内部物流转运系统输送路径复杂,物料分拆的环节多,很难建立数学模型对整个物流系统进行全面的描述或者对物流系统中运动的货物进行实时的跟踪,本文采用系统仿真技术验证船舶内部转运系统设计方案,通过系统仿真确定系统的瓶颈和转运能力.基于仿真分析结果,优化局部转运传输策略,改进了船舶内部转运系统的配置方案,提高了系统的整体转运能力.     

Development of a simulation-based optimisation for controlling operation allocation and material handling equipment selection in FMS

Flexible manufacturing system (FMS) is described as a set of computerised numerical controlled machines, input–output buffers interconnected by automated material handling devices. This paper develops a bi-objective operation allocation and material handling equipment selection problem in FMS with the aim of minimising the machine operation, material handling and machine setup costs and maximising the machine utilisation. The proposed model is solved by a modified chaotic ant swarm simulation based optimisation (CAS²O) while applying pre-selection and discrete recombination operators is surveyed a capable method to simulate different experiments of FMS problems. A test problem is selected from the literature to evaluate the performance of the proposed approach. The results validate the effectiveness of the proposed method to solve the FMS scheduling problem.     

典型无机非金属材料增材制造研究与应用现状

增材制造是基于离散堆积思想实现原型或产品零件的快速制造。作为三大材料之一的无机非金属材料在医疗、航天航空、汽车、建筑、工艺品等众多领域都具有无可比拟的巨大应用前景,为了能够快速制造形状任意复杂的器件,无机非金属材料的增材制造成为当下研究的热点。从增材制造技术类型、材料等方面详细阐述国内外无机非金属材料增材制造研究水平与发展状况,对比几种常用的无机非金属材料,重点是针对几种常见的陶瓷材料以及用于砂型铸造材料等成形特点及面临问题进行阐述,阐明了目前无机非金属材料增材制造存在的迫切需要解决的关键性问题,并深入分析了材料处理工艺、3DP/SLS/SLM三维成形工艺、后处理工艺对成形件的质量和性能的影响作用,最后对宝玉石材料的增材制造提出一些展望。     

周转量在物流运输成本分析中的应用

引入运输周转量叠加累计的方法,将物流运输成本量化运用于总图方案比较中。通过换算后的平均运输距离来分析高阶段总平面布置方案的合理性,继而调整整体布局和运输距离,优化方案,实现总图与运输的完美统一;同时,也增强方案实施的可行性,赢得市场。     

Research of Dynamic Material Handling in an Automobile General Assembly Line Based on Real-time Information

The status of material delivery of an automobile general assembly line is analyzed,and the technique to achieve the real-time tracking of assembly statas information is proposed based on RFID( Radio Frequency Identification) . Thus the consumption of line-side buffer is obtained dynamically,then the type and quantity of needed material are fed back to the subsystem of material handling; the algorithm for determining the best time departure time of delivery driver based on minimizing of total time penalty function is proposed. This approach makes the ma- terial amount of a single delivery trip maximized and improves the efficiency of delivery drivers significantly in the case of does not affect the assembly line normal throughput. Additionally,although this dynamic material handling method is developed for the automobile assembly plant,it should be pointed out that this method is also applicable to other mixed model assembly plants such as electronics,semiconductor and aerospace industry.     

基于损失函数的随机设施布局优化分析

现有的随机设施布局问题的优化方法或是优化总物料处理成本的均值以获得最鲁棒的布局,或是优化其方差以获得最稳定的布局,但两者均只优化了总物料处理成本随机特征中的一个方面.通过引入田口损失函数的概念,建立了新的随机设施布局优化模型,对总物料处理成本的均值和方差同时进行优化求解,相比于现有的优化方法,新方法得到的布局形式能够使系统同时获得较好的鲁棒性和稳定性.     

Effective material flow at an assembly facility

Effective material flow in an assembly facility leads to reduced material handling costs and increased productivity. This research focuses on improving the flow of materials for an assembly facility that receives supplied parts through receiving docks and transfers the parts to material storage locations and then to part usage locations. The locations of the receiving docks, storage locations, and line locations are predetermined, but the assignment of parts to dock locations and storage locations and the material flow paths through the facility are decision variables. Furthermore, design decisions such as the dock strategy employed and the configuration of the storage areas lead to additional decision variables. The goal is to reduce overall material handling costs by effectively receiving, storing and transferring the material from loading docks to line locations. The contribution of this research is in applying multi-commodity network flow models that integrate many of the sub-problems that are assumed to be solved a priori in many existing models. This integrated approach was used to evaluate configuration changes for a collaborating facility. One of the scenarios analysed showed an improvement in the material handling costs of nearly 10% as compared to current practices.     

A performance analytical model of automated material handling system for semiconductor wafer fabrication system

To effectively analyse and evaluate the performances of closed-loop automated material handling system (AMHS) with shortcut and blocking in semiconductor wafer fabrication system, a modified Markov chain model (MMCM) has been proposed. The system characteristics, such as vehicle blockage and system’s shortcut configuration, are well considered in the MMCM. The state space explosion problem and computational challenge due to the increase of AMHS scale can be effectively eliminated. With production data from Interbay material handling system of a 300-mm semiconductor wafer fabrication line, the proposed MMCM is compared with simulation analysis model. The results demonstrate that the proposed MMCM is an effective modelling methodology for AMHS’s performance analysis at system design stage.