利用滚齿机加工内配水环导叶轴孔

1 引言 内配水环是贯流式水轮机导水机构的一个重要部件,它与外配水环及分布在内、外配水环间的导叶共同组成了导水机构的主体.如图1所示如下.     

卧式机组水轮机导水机构尺寸链的分析

介绍了卧式水轮机导水机构端面间隙的形成及计算,在力求完美设计导水机构端面间隙方面提出了见解,阐述了卧式水轮机导水机构尺寸链的计算。     

高铅青铜摩擦环铸造工艺研究

高铅青铜摩擦环铸造工艺研究哈尔滨电机有限责任公司金权，韩宪荣我厂为国家重点建设工程五强溪电站生产的机组是与德国沃依特公司的合作产品，该机组属于世界级水平的巨型机组．技术难度、生产难度都很大。在该机组导水机构中有一种摩擦环件采用的是德国材质Ｇ—ＣｕＰｂ...     

SolidWorks软件在焦粉集尘设备制造中的应用

在焦粉集尘设备钢结构的制造过程中,经常会遇到像导槽这样的用于连接物料进出口的连通装置。对于像导槽这样的设备来说,考虑到集尘设备的使用环境及缩小集尘设备的占地面积,其形状常带有许多折弯和拼接，而这给我们的生产制造带来了一定的困难。通过借助SolidWorks强大的实体造型和虚拟装配功能，在软件的模拟环境中对设备进行预组装，可以很好地解决这个问题。     

高水头水轮机导叶漏水的处理

在高水头电站的导水机构改造中,通过对导水机构和转轮空蚀情况的分析和对比,同时运用空蚀理论,研究了空蚀产生的原因、危害,进而得出了处理方法。并分析了O型密封圈在导叶轴颈密封中的使用,获取了一些处理导叶漏水的经验。     

起重机智联通讯系统

文中详细介绍了一种起重机智联通讯系统，该系统利用物联网技术在智能制造工厂中构建起重设备与上游系统的云边端通讯网络，包括前端控制机构（与起重机连接，用于获取起重机的全流程作业信息和作业环境信息）、边缘处理机构（与前端控制机构连接，用于对控制机构上传的信息进行处理）、数据管理机构（与边缘处理机构连接，用于基于边缘处理机构上传的信息对起重机作业进行管理）等。该系统可实现起重机工业生产全流程要素的信息通讯，进而实现智能起重机安全、精准、高效的全自动运行。     

装卸机械产品质量的主要特征

介绍了在装卸机械设计与制造工作中产品质量的主要特征。通过合同、设备功能、设备参数、机构及结构可靠性等方面阐述产品质量控制所要注意的若干问题。     

导水机构中剪切力及摩擦力矩仿真试验研究

混流式导水机构中,通过导叶臂与连接板之间的剪断销与摩擦轴承作为导水机构的"保险丝",当机组出现异常时,通过对剪断销"剪断"和摩擦轴衬的摩擦力,来保证导水机构不受到持续损害,文中探讨一种对剪切力和摩擦力的实验方法。     

便捷的网络打印轻松的升级体验--河南环宇设备制造有限公司网络打印升级案例分析

河南环宇设备制造有限公司（下称环字设备制造）是一家以设备制造为主营业务的公司。在过去几年，公司有了长足的发展。随着生意的扩大和业务的拓展，不论是公司的规模，还是公司对IT设备的应用都上升到一个新的阶段。     

变极调速起重机空气开关跳闸机理分析

针对起重机小车机构出现的空气开关跳闸故障,建立了小车机构空气开关跳闸故障树。通过设备排查,发现由于接触器同时导通,导致电动机相间短路,发生跳闸故障。并针对小车机构控制设备及变极调速方式中存在的安全隐患,提出了硬件保护和软件设计完善等措施,以提高起重机的安全可靠性。     

环形脉冲分配器(硬件)的软化法

主要描述在伺服驱动系统中用软件的方法取代环形分配器,实现对步进电动机的环形脉冲的分配。     

An Integrated Maintenance Management System for an Advanced Manufacturing Company

Maintenance costs in advanced manufacturing companies, e.g. electronics manufacturing companies, have been steadily increasing as the companies upgrade their production facilities. Maintenance costs are normally a considerable portion of the product cost. To maintain a competitive place in the market, it is critical for an advanced manufacturing company to have a sound maintenance management system, which can control its maintenance costs at the lowest level and maintain its overall equipment effectiveness at the highest level. This paper reports on an integrated maintenance management system, which has been developed and implemented in an advanced electronics manufacturing company in Hong Kong. The methods and principles of the system are discussed in sections on maintenance performance auditing, cost recording and tracing, reliability centred maintenance planning and control, condition monitoring and on-line feedback control, and integrated maintenance planning and control.     

Genetic algorithm-based integrated production planning considering manufacturing partners

This paper deals with an integrated production planning problem in the presence of manufacturing partners. In this environment, although most of the products and parts are produced in local plants, they can also be purchased from any desirable manufacturing partners at reasonable costs. The objective of this study is to provide efficient integrated production plans for both local plants with finite production capacity and manufacturing partners, while minimizing the total production costs. For solving this problem, we formulated an integrated production planning problem by modifying a multi-level lot-sizing (MLLS) problem, and proposed an efficient genetic-algorithm-based heuristic for minimizing the costs of production, inventory, and subcontracting with manufacturing partners. The proposed heuristic consists of a unique chromosome structure, a chromosome-generation method, and genetic operators. The experimental analysis shows that the proposed heuristic generates quite good solutions at low computational costs, in comparison with a commercial optimization package.     

Evaluating Multiple Feature-Based Machining Methods Using an Activity-Based Cost Analysis Model

For a designed part, if different sets of features are used for machining, the manufacturing costs may vary. In this research, the different manufacturing costs for the different feature-based machining methods are analyzed using an activity-based cost model. First, the activities required for machining a set of features are analyzed. Second, the activity-related cost for each activity is evaluated based on a consistent time scale. The summation of costs of the activities equals the manufacturing cost for producing the part. Finally, the different manufacturing costs corresponding to the multiple feature-based machining methods are evaluated. The set of features that can be machined with the lowest manufacturing cost is considered a good way to produce the part. Example parts are tested and discussed.     

某星载天线配电器结构设计与仿真分析

星载天线配电器是卫星对载荷母线的分配与控制单元,天线配电器开关机控制与放电控制的可靠性对雷达系统设备的可靠运行非常关键.为了实现配电器小型化设计,减少内部大量布线,优化结构与电路布局,文中根据星载天线配电器电路设计及使用的特点,提出了新型的设计方案,改变了常规的设计理念,采用多层叠加组合方式完成配电器的设计,不仅比初始方案减小21%的体积,解决了内部走线困难的问题,而且也方便了配电器的装配、调试与维护,可以实现单层单元的备件互换,提高产品的可靠性.利用ANSYS软件对新型结构设计方案进行了力学与热学仿真分析,优化结构设计,分析结果满足星载环境要求,并在振动及温度循环试验中得到了验证.     

Different approaches for the loop layout problems: a review

In the manufacturing process, loop layout problems (LLPs) are preferred to configurations like single row layout, double row layout, cluster layout, and circular layout for their relative lower initial investment costs because they contain a minimal number of required material links to connect all workstations while providing a high degree of material handling flexibility. The performance of a system is based on the impact of the loop layout. Most of these LLPs are non-polynomial hard. Numerous research works related to loop layout have been published. The literature analysis given here is not restricted to specific considerations about loop layout design. This paper aims to deal with the current and future trends of research on LLPs based on previous research including formulations, solution methodologies. A trend toward bidirectional assumption, large-sized test problems, mixed integer programming, shortcuts instead of additional loop, loading and waiting time for shortcuts, integration of the supply chain management with the data envelopment analysis and also integrate exact, decomposition algorithm with metaheuristics, and developing loop layout using metaheuristics such as scatter search algorithm, improved tabu search, and artificial bees colony algorithm to loop layout is observed. Several research directions are pointed out and discussed.     

基于过程管理的协同质量保证技术研究

在综合分析ISO9000质量保证体系结构、系统运行机制和设计特点的基础上，对建立基于过程管理的协同质量保证系统所涉及的关键支撑平台、仿真技术、体系结构和实现方法进行了研究。说明了基于Petri网的质量保证流程在网络化制造中的一般交互过程，在此基础上开发了原型系统。     

Manufacturing Cost Modeling for Product Design

The process of product design is driven toward achieving design specifications while meeting cost targets. Designers typically have models and tools to aid in functional and performance analysis of the design but few tools and little quantitative information to aid in cost analysis. Estimates of the cost of manufacture often are made through a cost multiplier based on material cost. Manufacturing supplies guidelines to aid in design, but these guidelines often lack the detail needed to make sound design decisions.A need was identified for a quantitative way for modeling manufacturing costs at Motorola. After benchmarking cost modeling efforts around the company, an activity-based costing method was developed to model manufacturing cycle time and cost. Models for 12 key manufacturing steps were developed. The factory operating costs are broken down by time, and cost is allocated to each product according to the processing it requires. The process models were combined into a system-level model, capturing subtle yet realistic operational detail.The framework was implemented in a software program to aid designers in calculating manufacturing costs from limited design information. Since the information tool provides an estimate of manufacturing costs at the design prototype stage, the development engineer can identify and eliminate expensive components and reduce the need for costly manufacturing processing. Using this methodology to make quantitative trade-offs between material and manufacturing costs, significant savings in overall product costs are achieved.     

新型双闭环高精度数控机床

针对制造工业对高精度数控机床的需求,研究开发出新型双闭环高精度数控机床系列产品。其特点是,采用转角—线位移双闭环位置控制和信息化精度创成技术,既具有高档全闭环机床的加工精度,又具有半闭环机床的稳定性和环境适应性,并且其造价与普及型数控机床相当。实际应用证明,双闭环机床在复杂精密零件加工方面具有良好效果