可逆轧机底板、牌坊安装调整方

本文结合天津轧一冷轧薄板工程可逆式冷轧机组的安装,阐述了可逆轧机底板、牌坊的安装技术。采用了灌浆法施工垫板,底板和牌坊采用斜垫板、千斤顶调整,钢线、打摆工具、千分尺配合测量,进行可逆轧机底板、牌坊的调整。     

铝箔轧机工作辊轴承抱死原因分析及其对策

对于铝箔生产厂家来说,如何减少轧机非正常停机时间一直是设备维护部门最关心的问题。在生产过程中铝箔轧机工作辊轴承抱死事故的发生一直严重影响着设备的正常生产运行。工作辊轴承抱死不仅增加铝箔轧机非正常停机时间,而且损伤轧辊、加快轧辊的磨损、缩短轧辊的使用寿命,严重时甚至引发火灾。因此,如何有效防止工作辊轴承抱死是设备维护部门长期探索的一项重要课题。     

辊类零件埋弧堆焊修复质量提高策略探究

一概述数以万计的辊类原件的过度消耗造成的资源浪费，让人们开始思考新的技术。近几十年来，辊类零件的埋弧堆焊修复工艺开始异军突起，成为国内外钢铁行业和冶金行业关注的焦点。上世纪70年代，埋弧堆焊的技术开始大量应用，堆焊在高强度、高韧性的低合金、中碳合金钢辊芯表面制造耐磨层，辊类零件埋弧堆焊修复技术开始迅猛发展。目前辊类零件包括连铸辊、夹送辊、助卷辊、开坯辊、辊道辊、热轧支承辊、半钢轧辊等各种辊，大部分都能采用埋弧堆焊技术修复。我国现在的堆焊材料的质量种类、技术水平以及修复工艺都有了很好地提升。     

浅谈冷轧风机的常见机械故障与保养维护

冷轧风机是冷轧生产中极为常用和较为重要的生产辅助设备,在轧辊轧制时为辊面提供风冷降温,避免辊面温度过高,可以有效减少辊体热应力,降低辊面磨损消耗,保证产品质量,以及延长轧辊使用寿命。在冷轧设备中,冷轧风机的工作环境是比较恶劣的,工作环境中金属粉尘颗粒多,存在酸性气体并且设备运转时间长。因此,轧辊风机属于比较重要,而且机械磨损较大、故障多发的设备,而冷轧风机的保养与维护工作也一直是冷轧生产设备保养维修维护工作中的重要内容。本文主要对冷轧风机工作环境和机械故障情况进行了分析,对冷轧风机的维修维护与保养措施进行了探讨。     

开坯轧机牌坊精密加工关键技术探讨

文章介绍了开坯轧机牌坊的主要技术参数内容,详细分析了加工制造工艺流程以及关键工序质量控制方法;对于关键工序加工的方法进行适当的质量控制,有利于提高加工精度,满足生产要求。     

二辊周期式冷轧管机在铜合金管材生产中的应用与发展

对于铜合金管材生产而言,二辊周期轧机是关键工艺装备,随着大长度管坯连续化生产工艺的发展,长行程、高速度、高效率、自动化已成为二辊周期冷轧管机轧机发展的必然趋势。文章详细介绍了二辊周期冷轧管轧机的应用特点、发展现状及技术关键,高速度、高效率是未来我国周期式冷轧管机的发展方向。     

浅谈轧机出口夹送辊电气控制

<正>一前言邯钢新区冷轧厂采用德国SMS集团最新设计的连续酸洗五架串列式六辊轧机冷轧机组,电气控制采用德国Siemens自动化公司S7-400以及SIMATIC TDC控制器,轧机出口的夹送辊在剪切过程中需要保持5号机架与卷取机之间的张力,控制过程及方式比较复杂,本文将简单介绍轧机出口夹送辊的电气控制。二夹送辊的作用及结构夹送辊位于板型仪和滚筒剪之间,主要作用有以下几点:1.穿带过程中,传送带头到卷取机。2.板钢切断后,保持轧机出口张力。     

应用价值工程 优化支承辊热加工工艺

Ｄ２８１０冷热轧支承辊是我公司开发并批量生产的备件产品。辊身直径为１２５０～１６５０ｍｍ、２５～５５ｔ,其技术要求高,生产环节多、制造难度大,生产周期长而成本高。为了降低能耗和生产成本,缩短生产周期,提高经济效益,我们应用价值工程对支承辊热加工工艺进行分析研究和优化,取得了良好效果。一、对象选择支承辊属典型的大型锻钢件。从投料到产品出厂,热加工工作量占产品生产总加工量７０%以上,加工成本约占总加工成本的８０%。热加工周期长,占用相关设备多。所以选为开展价值工程活动对象可获得较好经济效益。支承辊热加工生产工艺…     

堆焊技术在立式磨磨辊制造中的应用浅析

立式磨磨辊的磨损问题直接影响其工作质量和效率,通过分析磨辊的工况和磨损情况,综合考虑磨辊的几种制造方式,明确采用堆焊技术、制定合理的焊接工艺进行磨辊制造可有效地提高磨辊的耐磨性和使用寿命,优势显著。     

轧机液压弯辊控制技术的研究现状

<正>四辊轧机是现代轧钢行业中最常用的精锐轧机,它多用来生产箔带、极薄至中厚规格板带,应用范围极为广泛。四辊轧机能够有效地对板带的凸度加以控制,对板形的调节迅速而有效,可消除板带边缘的不良接触,同时板宽以外的接触压力对工作辊形成的有害弯矩也可以加以避免。分析弯辊缸压力波动的根源与机理,针对液压弯辊控制系统,采取合理有效的措施削弱其所受压力冲击,对提高设备运行稳定性、减少生产事故、改善板形质量具有重要意义。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

The Creation of the Office for National Statistics

A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.     

What helps? Women engineers' accounts of staying on

We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.     

论现代物流企业的发展观

物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。     

浅谈大体积混凝土裂缝的控制

大体积混凝土的裂缝问题是实际工程中长期困扰工程技术人员的问题,其控制技术的研究是混凝土结构研究的热点问题,具有重大的学术价值和潜伏的工程背景。     

Supply Chain Strategies in the UK Fashion Industry—The Rhetoric of Partnership and Realities of Power

This paper focuses on the fashion industry, one characterised by issues such as dramatic shifts in the scale and power of major retail buyers in the market, the advent of retailer own brands, and the nature of sourcing and supply chain decisions, issues that are increasingly global in nature. The aim of this research is to explore the nature of relationships between UK high street multiple fashion retailers and their contracted suppliers, many of whom are entrepreneurial firms by most definitions of the term. Four core themes emerge from the literature and provide a framework for the research, namely, power, process, partnership, and people. The research approach was qualitative, and conducted over a period of twelve months. The paper ends with an agenda for future research.