附录A
Portal power
China’s rapid economic growth in the past decade has resulted in a big increase in freight traffic through the country’s seaports . Old ports are being expanded and new ports built to handle the large growth in container and bulk cargo traffic all along the Chinese coastline.
China’s port expansion programme has provided a strong boost to the domestic port equipment industry, which has enjoyed a strong increase in demand for port cranes of various types, including container cranes and portal cranes along with bulk cargo handling equipment.
State-run China Harbour Engineering (group) Corporation Ltd, established under the ruling State Council, is China’s largest supplier of port cranes and bulk cargo handling equipment. The organization controls both Shanghai Zhenhua Port Machinery Co Ltd (ZPMC),the world’s largest manufacturer of quayside container cranes, and Shanghai Port Machinery Plant (SPMP), which specializes in the manufacturer of portal cranes and other cranes used in ports along with dry bulk cargo handling equipment.
SPMP’s main market is China, although the company is looking to expand its overseas sales. Although less well known than its associate ZPMC, SPMP also operates large manufacturing facilities, and is due to move part of its production shortly to Changxing Island near Shanghai where ZPMC already operates a large container crane fabrication plant.
Portal and other harbour cranes are SPMP’s major production item. During the past two years, the corporation has won contracts for 145 portal cranes from port authorities throughout China, both from new ports under construction and ports undergoing expansion.
In recent years, SPMP has also supplied portal cranes to the United States, Iraq,and Myanmar.The port Rangoon of Myanmar in has purchased a 47m,40t portal
crane while BIW of the United States has purchased three cranes-15t,150t, and 300t portal cranes. Elsewhere, SPMP has supplied 12 portal cranes to several ports in Iraq since the end of the Saddam regime.
In China, SPMP’s recent major orders for portal cranes include eight 40t, 45m radius cranes for Tianjin Overseas Mineral Terminal, while Yan Tai Port Bureau in Guangdong in southern China has purchased six 40t, 45m radius cranes. Other large orders include seven 10t, 25m radius cranes for Zhenjiang Port Group and an order of 1025t, 33m radius cranes from Fangcheng Port Bureau, while the Yingkou Port Group has ordered 1325t,35m radius cranes along with two 40t, 44m radius port cranes.
MANY CRANES BUILT TO ORDER
SPMP also supplies other cranes used in ports and harbours, many of which are built to order for clients. Quayside container cranes have been supplied to a number of foreign clients including Bangkok Port in Thailand, Kaohsiung Port in Taiwan, and Port of Vancouver in Canada. In China, SPMP has supplied quayside container cranes to Shanghai Port, Tianjin Port, Yin Kou Port, Yan Tai Port and others. The company also supplies rubber-tyred container gantry cranes to domestic and overseas clients. Customers for other cranes used in ports include Guangzhou Port in Guangdong, which purchased a 25t floating crane while Zhonggang Port has bought two double trolley 125/63t gantry cranes, along with a700t overhead crane, In 2003 Zhonggang Port awarded a contract to SPMP for a 2,600t floating crane, whichi is the largest crane the company has made in recent years.
Other customers include Zhongyuan Nanytong Shipyard of Jiangsu Province has purchased two 300t goliath cranes for use in its shipyard, while Shanghai Waigaoqiao Shipyard uses two of SPMP’s 600t goliath cranes for its shipbuilding operations. SPMP has two factories. The Shanghai plant employs 2,000 workers while a factory in Jiangsu Province employs 1,500 workers. The combined total of 3,500 workers includes 800 technical and management staff involved in designing, developing, and building portal and other cranes along with dry bulk cargo loading and unloading equipment.
Currently, SPMP is preparing to vacat e its Shanghai factory site as the company’s existing plot of land is part of a riverside area earmarked by the Shanghai Expo in 2010. SPMP’s Shanghai factory will close at the end of 2006, and move to a new site on nearby Changxing Island.
“The new factory will be much bigger than the present plant,” Li said. “Phase 1 will be ready for us when we move at the end of 2006.”
In addition to moving the Shanghai factory to a new site, SPMP expects future business operation with ZPMC.
Officials at China Harbour Engineering (Group) Corporation are understood to have told SPMP of plants for SPMP and ZPMC to co-operate more in bidding for projects in future. Both companies are expected to retain their individual manufacturing capability, however, with precise details of future co-operation still some way from being finalised.
Meanwhile, SPMP associate company ZPMC is strengthening its position as the world’s largest manufacturer of ship-to-shore container cranes, supplying slightly more than half the annual international container crane market. In addition to operating four crane production complexes for its crane manufacturing and other businesses.
ZPMC’s full range of products includes quayside container cranes, rubber-tyred gantry cranes, bulk material ship loaders and unloaders, bucket-wheel stackers and reclaimers, portal cranes, floating cranes, and engineering vessels. The company has also diversified into manufacturing other large steel structures including large steel bridges.
ZPMC EXPANDING PRODUCTION
ZPMC’s c ranes and other products are in use at over 150 shipping terminals in 37 countries and regions worldwide. By the end of December 2005, ZPMC had supplied 705 quayside container cranes, and had orders in hand to deliver another 128 quayside container cranes in 2006. In addition, at the end of 2005 ZPMC had delivered 1,148 rubber-tyred gantry cranes to customers worldwide and had orders in hand to deliver 308 rubber-tyred gantry cranes to customers in 2006.
ZPMC is expanding production facilities in expectation that the volume of orders will grow in future. The company owns four crane production complexes in Shanghai and the surrounding area at Jiangyin, Changzhou, Zhangjiang and Changxing Island. The Changxing production site, which was completed in 2001, covers one million sq m, and has a 3.5km coastline. The facility is capable of manufacturing 160 quayside ship-to-shore container cranes each year along with 300 rubber-tyred gantry cranes and 200,000 metric tons of large steel bridge structures.
Plans call for a futher 3 million sq m of land to be reclaimed at Changxing, which ZPMC will develop to become its largest production centre.
Korea looks inward
In a fragmented global port crane industry, Korean manufacturers are being forced to look for more business in their domestic markets
South Korea’s container crane and port crane equipment manufacturing industry has become more focused on the domestic market in recent years as manufacturers have faced tough price competition from ZPMC of China in major foreign markets. The problem is the same as that faced by other port crane manufacturers around the world, none of which account for more than about an 8% share of the world container crane market.
As well as ZPMC, competition from European and Japanese equipment suppliers is also strong, both for quayside container cranes and for rubber-tyred gantry crane contracts. While South Korean firms-including Hyundai Heavy Industries, Samsung Heavy Industries, Doosan Heavy Industries, and Hanjin Heavy Industries – continue to bid for international contracts, winning large orders has become increasingly rare. Doosan Heavy Industries & Construction Co Ltd is believed to be the only South Korean port crane maker to have won a large container crane contract during the past few years, with most orders booker by Korean manufacturers being for less than
10 crane units.
Doosan recently completed delivery of a 42-unit rubber-tyred gantry crane (RTGC) order to the Port of Singapore Authority PSN that was awarded in 2004. Including a recent contract. Doosan has received orders to supply the Port of Singapore with a total of 120 RTGCs since 1997. The recent batch of RTGCs is designed for increased safety. Esch of the RTGCs is fitted with 16 wheels instead of the usual eight.
“We have supplied container cranes locally and overseas. Most projects are one or two units, but Singapore has been 120 units,” commented a source in Doosan Heavy Industries’ material handling equipment division. “Container cranes ca n lift one or two containers depending on the client, but the twin spreader design is normal now. Our biggest contract before was with Pusan Port for over 10 container cranes.”
BUILDING POWER PLANTS
Doosan Heavy Industries’ major activities include the design and construction of power plants. Apart from supplying protection equipment, Doosan also manufactures turbines and generator sets. Doosan has a large castings and forging division. Other major activities include the construction of desalination plants in the Middle East.
Container port handling equipment is produced by Doosan’s material handling equipment division, which supplies coal handling equipment and bulk cargo handling facilities for other industries.
Port of Singapore Authority is the largest customer for RTGCs. Other recent clients include Southern Gateway Terminals in Colombo, Sri Lanka, and Korea Express in the Port of Pusan.
Doosan also supplies ship to shore container cranes. Recent quayside gantry crane clients include Jakarta Container Terminal in Indonesia, Jawaharlal Nehru Port near Mumbai in India, and Frazer Terminal in Vancouver.
“Prospects for our port crane sales are not bright. ZPMC is dominating the world market due to price,” the source commented. “We are looking for p rojects not invoving ZPMC as they are not concerned with all projects. We got contracts in
Singapore in 2004 and 2005. We had no success anywhere else, but we are still bidding on various tenders.”
Doosan is expected to be one of the bidders for container cranes to be installed in South Korea’s planned Kwangyang Bay Port expansion. The company’s R&D division is involved developing new automated controls that will be required for quayside container cranes installed in the port expansion.
“Container crane s are well developed in technical terms. There is nothing else to develop except for automation,” the source said. “We are developing more automated controls, but the new features are not commercialized yet.
Our government has a plan for Kwangyang Bay 3-2 terminal project, which they announced will be developed as an automated terminal. We have to adapt to this. The tender has been postponed for about six years. We expect the project will be tendered again in 2007 or 2008.”
South Korea’s other container crane manufacturers also are expected to bid for the Kwangyang Bay project, which is likely to be awarded to a local supplier. Hyundal Samho Heavy Industries will be among the bidders having recently commissioned five automated rail mounted gantry cranes (RMGCs) also known as automated transfer cranes at Pusan East Container Terminal (PECT) .
The terminal has become the first terminal in Korea to install automated cranes, which are in service at new berths four and five .
The cranes stack nine-wide between a 28.5m rail gauge, and have dual cantilevers covering two road lanes . Stack height is 1 over 6 by 9ft 6in high and operational speeds are 150m/min for the gantry , 120m/min for the trolley and 75-80m/min for the empty hoist .
Among other recent orders that Hyundai has won is a contract for four quayside container cranes from Hutchison Port Holdings and one for Uam Port. Competition from ZPMC remains the main challenge in winning overseas contracts according to Hyund ai Heavy Industries sales manager Lee Yong Tae : “ We are trying to get more projects , but ZPMC has a very low price . We will try to cut our price but we think it will lead to a bad situation in future . ”
“ if customers think that quality is important then we are ok , but if they just think about price we cannot win the project . We have experience of building cranes to lift one or two containers .We buy the main crane controls system from ABB and then use a Korean fabricator .”
附录B
港口起重机
中国经济在过去的高速增长已经大幅增加了本国港口货流量，以至于不断扩大老港口以及不断修建新的港口以应对快速增长的集装箱业务以及大宗货物的流通。
中国的港口扩展进程对本国港口装备行业的发展产生了强烈的刺激，这一进程强烈需要大量的各种各样的港口起重机的迅猛增加，包括集装箱起重机、桥门式起重机以及其他能够处理散料货物的装卸设备。
由国资委掌控的中国港口工程集团有限公司是中国最大的港口起重机和散
料装卸设备的供应商。该集团包括世界最大的港口集装箱起重机生厂商振华港口机械有限公司（ZPMC）和精于生产用于港口的桥门式起重机以及干散货物的装卸设备的上海港口机械厂（SPMP）。
上海港口机械厂主要市场是中国本地，虽然它在寻求扩大海外销售。尽管它没有同行振华港口机械有限公司出名，上海港口机械厂拥有很多的大型生产设施，它计划不久将一部分生产线转移到上海附近的长兴岛。振华港口机械有限公司已经在那里建立了一个大型集装箱起重机组装厂。
上海港口机械厂主要的生产项目是桥门式起重机和其它用途的港口起重机。在过去的两年里，该公司已经获得了来自全国港务局的的145份桥门式起重机的合同，这其中包括正在建设的新港口和正在扩张的港口。
最近几年，上海港口机械厂已经向美国，伊拉克以及缅甸提供桥门式起重机。缅甸的仰光港口购买了一座跨度为47米，起重量为40吨的桥门式起重机，然而美国的BIW购买了三台起重量分别为15t,150t, 和 300t起重机。另外，上海港口机械厂已向伊拉克的一些港口提供了12台起重机自从萨达姆下台后。
在中国，上海港口机械厂最近的主要订单是桥门式起重机，这其中包括天津海外矿产航运码头的8台起重量为40t，回转半径为45m的起重机，然而，位于中国南部的广东盐田港务局已经购买了6台这样的起重机。其它一些大的订单包括镇江港务集团的7台起重量为10t，回转半径为25m的起重机和防城港务局的10台起重量为25t，回转半径为33m的起重机，而营口港务局已经13台起重量为25t，回转半径为35m和2台起重量为40t，回转半径为44m的桥门机。
许多起重机按照订单在建
上海港口机械厂也提供港口和海湾其它用途的起重机，这些大多数按照客户的要求建造。它已经向许多国外客户提供岸边集装箱起重机，这其中包括泰国的曼谷港，台湾的高雄港和加拿大的温哥华港。在中国国内，该公司已向上海港，天津港，烟台港以及其他的一些港口提供岸边集装箱起重机。该公司也向国内外客户提供轮胎式龙门起重机。
订购其它港口起重机的公司包括广东的广州，它购买了一台25t的浮吊，而中港港口已购买了两台125/63t双小车龙门起重机和一台700t的桥式起重机。2003年，中港港口与上海港口机械厂签订一台2600t的浮吊合同，这是该公司
近些年做的最大吨位的起重机。
其它的一些用户包括江苏省的中原南通造船厂，它已经购买了两台300t用于船坞的戈利亚特起重机，而上海外高桥船厂已将上海港口机械厂的两台600t 戈利亚特起重机用于船舶建造中。上海港口机械厂有两个厂区。在上海的厂区有2000名工人，江苏的厂区有1500名工人。在这3500名工人中，有800名技术人员和管理人员从事于设计，开发，建造港口类和其它类起重机以及大宗干散货物的装卸设备。
目前，该公司正准备迁出它在上海的厂区，因为该区是预留给2010上海世博会的一块滨水区。该公司的上海分厂将于2006年年底关闭，它将迁移到一个在上海附近长兴岛的新厂区。
“新厂区将比现有的厂区大，”李说，“当2006年年底我们迁出时，我们将做好第一阶段的准备工作。”
除了将上海的厂区迁移到新址外，该公司希望将来能与振华在业务上合作。
中国港湾建设（集团）总公司的高层们被人们认为他们已经告诉上海港口机械厂它将与振华在招标项目上有更多合作。两家公司希望保持各自的制造能力，然而，将来合作的精确细节仍没有确定。
另外，上海港口机械厂的合作公司振华正在加强其作为世界最大的船岸集装箱起重机生产商的地位，生产量几近世界集装箱起重机市场年产量的一多半。另外，它还经营着四个起重机生产综合体和一些其他的业务。
振华的产品系列包括集装箱起重机，轮胎式龙门起重机，干散货物船用装卸设备，斗轮堆取料机，门式起重机，浮吊以及工程船只。该公司还扩展到生产包括大型钢桥的大型钢结构。
振华扩大生产
全世界有37个国家和地区超过150个航运码头正在使用振华的起重机和其它的产品。振华已经提交了705台集装箱起重机，按照手头的订单将于2006年交付另外的128台集装箱起重机。除此之外，截止2005年底，振华已经向世界各地的客户交付了1148台轮胎式龙门起重机，按照手头的订单将于2006年交付308台轮胎式龙门起重机。
振华正在扩大生产设施，预计不久订单数将会增加。该公司拥有四个起重机
生产综合体在上海及周边地区，江阴，常州，湛江和长兴岛。
长兴岛生产基地将于2001年完成，占地面积100万平方米，有3.5千米的海岸线。该基地每年能够生产160台船岸集装箱起重机和300台轮胎式龙门起重机以及20，0000吨的大型钢桥结构。
其计划在长兴岛进一步填海3百万平方米，届时它将成为振华最大的生产中心。
韩国看重国内
在一个支离破碎的全球港口起重机行业中，韩国生产商不得不在国内市场寻求更多的商机。
韩国的集装箱起重机和港口起重机设备制造产业近几年越来越依赖国内市场，当该国的制造商面对来自中国振华港机在主要的国际市场的价格竞争。全球的其他制造商也面临着同样的问题，他们中没有那一家在国际集装箱起重机市场上占有超过8%的份额。
除了振华，来自欧洲和日本的生产商在岸边集装箱和轮胎式龙门起重机的竞争也很强烈。而韩国的现代重工，三星重工，斗山重工，大宇重工等仍然参加国际竞标，赢得大批订单的机会越来越少。
业内人士认为斗山重工是唯一一家在过去的几年里赢得集装箱起重机大订单的韩国港口起重工生产商，韩国厂商持有订单的不到10起重机单位。
斗山重工最近完成交付42股橡胶轮胎龙门起重机（ RTGC ）,该订单是新加坡管理局于2004年授予的。包括最近的合同。自1997年以来，斗山重工已收到新加坡总共有120 RTGCs的订单。最近一批RTGCs是专为提高安全性。埃斯克的RTGCs装有16个车轮而不是通常的8 。
“我们向国内和国际提供集装箱起重机。大多数工程都是一两组，但是新加坡已经订购了120组，”一位来自斗山重工材料处理设备部门的人士评论斗山重工，“集装箱起重机能吊起一个还是两个集装箱取决于用户，但是现在双扩张器很常见。之前我们最大的订单就是同釜山港签订的10台集装箱起重机。”
建造发电厂
斗山重工的主要业务包括设计和建造发电厂。除了提供保护设备，它还生产涡轮机和发电机组。它有大的铸件和锻造划分。其它的主要业务还包括在中东建
造海水淡化厂。
集装箱港口装卸设备是由斗山的材料处理设备部生产的，该部门还为其他行业生产煤炭处理设备和散装货物处理设备。
新加坡港口管理局是RTGCs的最大客户。最近的其他用户还有科伦坡的南方航运码头，斯里兰卡以及釜山港的韩国快车公司。
该公司还生产船岸集装箱起重机。最近的龙门起重机用户包括印度尼西亚的雅加达集装箱码头，印度孟买附近的贾瓦哈拉尔尼赫鲁港，以及温哥华的弗雷泽航运码头。
“我们的港口起重机的销售前景不容乐观。由于价格因素，振华港机正在掌控着国际市场，”内部人士透漏，“我们正在寻找不涉及振华业务的工程，因为它并不经营所有的工程。于2004和2005年我们同新加坡签订合同。我们在其他任何方面没有取得成功，但我们仍然会为各种竞标投标。”
斗山希望成为给韩国光阳湾扩建工程的安装集装箱起重机的一名投标人。的集装箱起重机将安装在计划扩建港口。该公司的研发部门参与开发安装在该扩建港口的边集装箱起重机的新的自动化控制装置。
“集装箱起重机也有技术周期。除了自动化，它没有别的发展方向，”该内部人士透漏，“我们正在开发更多的自动控制装置，但是新的功能还没有商业化。”
“我国政府计划的光阳湾码头项目，将于3月2日宣布将其发展成为一个自动化码头。我们必须适应这一点。投标已被推迟了大约6年。我们预计该项目将在2007年或2008年再次招标。”
韩国的其他集装箱起重机生产商也希望参与光阳湾扩建工程的投标，该工程有可能被授予一家韩国公司。在投标的企业中现代重工将被委托设计制造釜山东集装箱码头（ PECT ）的五个自动化轨道式龙门起重机（ RMGCs ），也被称为自动转移起重机在。
该码头已成为韩国第一个安装自动起重机的码头，服务新泊位有4个或5个。
该起重机有双悬臂包括两个行车线。堆叠高度按照1比6的比例为9英尺6寸高，龙门运行速度150m/min的，小车的运行速度为120m/min和空葫芦的运行速度为75-80m/min。
在现代最近获得的订单中，有一份来自和记黄埔港口的四台和Uam港的一台岸边集装箱起重机的订单。
根据现代销售部李经理的话，来自振华的竞争仍然是在赢得海外订单最主要的挑战，“我们正努力获得更多的项目，但振华的价格低廉。我们试图降低成本但是我们认为在将来这将会给我们造成不好的境况。”
“如果顾客认为质量很重要，那么我们是没问题的，但是如果他们认为价钱是重要的，那么我们将不能获得该项目。我们有经验建造能吊起1或2个集装箱的起重机。我们从ABB公司购买起重机的主要控制系统，然后在韩国组装。”
前言 在目前激烈的市场竞争中，产品投入市场的迟早往往是成败的关键。模具是高质量、高效率的产品生产工具，模具开发周期占整个产品开发周期的主要部分。因此客户对模具开发周期要求越来越短，不少客户把模具的交货期放在第一位置，然后才是质量和价格。因此，如何在保证质量、控制成本的前提下加工模具是值得认真考虑的问题。模具加工工艺是一项先进的制造工艺，已成为重要发展方向，在航空航天、汽车、机械等各行业得到越来越广泛的应用。模具加工技术，可以提高制造业的综合效益和竞争力。研究和建立模具工艺数据库，为生产企业提供迫切需要的高速切削加工数据，对推广高速切削加工技术具有非常重要的意义。本文的主要目标就是构建一个冲压模具工艺过程，将模具制造企业在实际生产中结合刀具、工件、机床与企业自身的实际情况积累得高速切削加工实例、工艺参数和经验等数据有选择地存储到高速切削数据库中，不但可以节省大量的人力、物力、财力，而且可以指导高速加工生产实践，达到提高加工效率，降低刀具费用，获得更高的经济效益。 1.冲压的概念、特点及应用 冲压是利用安装在冲压设备（主要是压力机）上的模具对材料施加压力，使其产生分离或塑性变形，从而获得所需零件（俗称冲压或冲压件）的一种压力加工方法。冲压通常是在常温下对材料进行冷变形加工，且主要采用板料来加工成所需零件，所以也叫冷冲压或板料冲压。冲压是材料压力加工或塑性加工的主要方法之一，隶属于材料成型工程术。 冲压所使用的模具称为冲压模具，简称冲模。冲模是将材料（金属或非金属）批量加工成所需冲件的专用工具。冲模在冲压中至关重要，没有符合要求的冲模，批量冲压生产就难以进行；没有先进的冲模，先进的冲压工艺就无法实现。冲压工艺与模具、冲压设备和冲压材料构成冲压加工的三要素，只有它们相互结合才能得出冲压件。 与机械加工及塑性加工的其它方法相比，冲压加工无论在技术方面还是经济方面都具有许多独特的优点，主要表现如下； (1) 冲压加工的生产效率高，且操作方便，易于实现机械化与自动化。这是
机械设计 摘要：机器是由机械装置和其它组件组成的。它是一种用来转换或传递能量的装置，例如：发动机、涡轮机、车辆、起重机、印刷机、洗衣机、照相机和摄影机等。许多原则和设计方法不但适用于机器的设计，也适用于非机器的设计。术语中的“机械装置设计”的含义要比“机械设计”的含义更为广泛一些，机械装置设计包括机械设计。在分析运动及设计结构时，要把产品外型以及以后的保养也要考虑在机械设计中。在机械工程领域中，以及其它工程领域中，所有这些都需要机械设备，比如：开关、凸轮、阀门、船舶以及搅拌机等。 关键词：设计流程设计规则机械设计 设计流程 设计开始之前就要想到机器的实际性，现存的机器需要在耐用性、效率、重量、速度，或者成本上得到改善。新的机器必需具有以前机器所能执行的功能。 在设计的初始阶段，应该允许设计人员充分发挥创造性，不要受到任何约束。即使产生了许多不切实际的想法，也会在设计的早期，即在绘制图纸之前被改正掉。只有这样，才不致于阻断创新的思路。通常,还要提出几套设计方案，然后加以比较。很有可能在这个计划最后决定中,使用了某些不在计划之内的一些设想。 一般的当外型特点和组件部分的尺寸特点分析得透彻时，就可以全面的设计和分析。接着还要客观的分析机器性能的优越性，以及它的安全、重量、耐用性，并且竞争力的成本也要考虑在分析结果之内。每一个至关重要的部分要优化它的比例和尺寸，同时也要保持与其它组成部分相协调。 也要选择原材料和处理原材料的方法。通过力学原理来分析和实现这些重要的特性，如那些静态反应的能量和摩擦力的最佳利用，像动力惯性、加速动力和能量；包括弹性材料的强度、应力和刚度等材料的物理特性，以及流体润滑和驱动器的流体力学。设计的过程是重复和合作的过程，无论是正式或非正式的进行，对设计者来说每个阶段都很重要。 最后，以图样为设计的标准，并建立将来的模型。如果它的测试是符合事先要
附录 科技译文： Numerical Control Numerical Control(NC) is a method of controlling the movements of machineComponents by directly inserting coded instructions in the form of numerical data(numbers and data ) into the system.The system automatically interprets these data and converts to output signals. These signals ,in turn control various machine components ,such as turning spindles on and off ,changing tools,moving the work piece or the tools along specific paths,and turning cutting fluits on and off. In order to appreciate the importer of numerical control of machines ,let’s briefly review how a process such as machining has been carried out traditionally .After studying the working drawing of a part, the operator sets up the appropriate process parameters(such as cutting speed ,feed,depth of cut,cutting fluid ,and so on),determines the sequence of operations to be performed,clamps the work piece in a workholding device such as chuck or collet ,and proceeds to make the part .Depending on part shape and the dimensional accuracy specified ,this approach usually requires skilled
附录一英文科技文献翻译 英文原文： Experimental investigation of laser surface textured parallel thrust bearings Performance enhancements by laser surface texturing (LST) of parallel-thrust bearings is experimentally investigated. Test results are compared with a theoretical model and good correlation is found over the relevant operating conditions. A compari- son of the performance of unidirectional and bi-directional partial-LST bearings with that of a baseline, untextured bearing is presented showing the bene?ts of LST in terms of increased clearance and reduced friction. KEY WORDS: ?uid ?lm bearings, slider bearings, surface texturing 1. Introduction The classical theory of hydrodynamic lubrication yields linear (Couette) velocity distribution with zero pressure gradients between smooth parallel surfaces under steady-state sliding. This results in an unstable hydrodynamic ?lm that would collapse under any external force acting normal to the surfaces. However, experience shows that stable lubricating ?lms can develop between parallel sliding surfaces, generally because of some mechanism that relaxes one or more of the assumptions of the classical theory. A stable ?uid ?lm with su?cient load-carrying capacity in parallel sliding surfaces can be obtained, for example, with macro or micro surface structure of di?erent types. These include waviness [1] and protruding microasperities [2–4]. A good literature review on the subject can be found in Ref. [5]. More recently, laser surface texturing (LST) [6–8], as well as inlet roughening by longitudinal or transverse grooves [9] were suggested to provide load capacity in parallel sliding. The inlet roughness concept of Tonder [9] is based on ??e?ective clearance‘‘ reduction in the sliding direction and in this respect it is identical to the par- tial-LST concept described in ref. [10] for generating hydrostatic e?ect in high-pressure mechanical seals. Very recently Wang et al. [11] demonstrated experimentally a doubling of the load-carrying capacity for the surface- texture design by reactive ion etching of SiC
机械设计理论 机械设计是一门通过设计新产品或者改进老产品来满足人类需求的应用技术科学。它涉及工程技术的各个领域，主要研究产品的尺寸、形状和详细结构的基本构思，还要研究产品在制造、销售和使用等方面的问题。 进行各种机械设计工作的人员通常被称为设计人员或者机械设计工程师。机械设计是一项创造性的工作。设计工程师不仅在工作上要有创造性，还必须在机械制图、运动学、工程材料、材料力学和机械制造工艺学等方面具有深厚的基础知识。如前所诉，机械设计的目的是生产能够满足人类需求的产品。发明、发现和科技知识本身并不一定能给人类带来好处，只有当它们被应用在产品上才能产生效益。因而，应该认识到在一个特定的产品进行设计之前，必须先确定人们是否需要这种产品。 应当把机械设计看成是机械设计人员运用创造性的才能进行产品设计、系统分析和制定产品的制造工艺学的一个良机。掌握工程基础知识要比熟记一些数据和公式更为重要。仅仅使用数据和公式是不足以在一个好的设计中做出所需的全部决定的。另一方面，应该认真精确的进行所有运算。例如，即使将一个小数点的位置放错，也会使正确的设计变成错误的。 一个好的设计人员应该勇于提出新的想法，而且愿意承担一定的风险，当新的方法不适用时，就使用原来的方法。因此，设计人员必须要有耐心，因为所花费的时间和努力并不能保证带来成功。一个全新的设计，要求屏弃许多陈旧的，为人们所熟知的方法。由于许多人墨守成规，这样做并不是一件容易的事。一位机械设计师应该不断地探索改进现有的产品的方法，在此过程中应该认真选择原有的、经过验证的设计原理，将其与未经过验证的新观念结合起来。 新设计本身会有许多缺陷和未能预料的问题发生，只有当这些缺陷和问题被解决之后，才能体现出新产品的优越性。因此，一个性能优越的产品诞生的同时，也伴随着较高的风险。应该强调的是，如果设计本身不要求采用全新的方法，就没有必要仅仅为了变革的目的而采用新方法。 在设计的初始阶段，应该允许设计人员充分发挥创造性，不受各种约束。即使产生了许多不切实际的想法，也会在设计的早期，即绘制图纸之前被改正掉。只有这样，才不致于堵塞创新的思路。通常，要提出几套设计方案，然后加以比较。很有可能在最后选定的方案中，采用了某些未被接受的方案中的一些想法。
外文资料翻译译文 塔式起重机 动臂装在高耸塔身上部的旋转起重机。作业空间大，主要用于房屋建筑施工中物料的垂直和水平输送及建筑构件的安装。由金属结构、工作机构和电气系统三部分组成。金属结构包括塔身、动臂和底座等。工作机构有起升、变幅、回转和行走四部分。电气系统包括电动机、控制器、配电柜、连接线路、信号及照明装置等。 塔式起重机简称塔机，亦称塔吊，起源于西欧。据记载，第一项有关建筑用塔机专利颁发于1900 年。1905 年出现了塔身固定的装有臂架的起重机，1923 年制成了近代塔机的原型样机，同年出现第一台比较完整的近代塔机。1930 年当时德国已开始批量生产塔机，并用于建筑施工。1941 年，有关塔机的德国工业标准DIN8770 公布。该标准规定以吊载(t)和幅度(m)的乘积(tm)一起以重力矩表示塔机的起重能力。 我国的塔机行业于20 世纪50 年代开始起步,相对于中西欧国家由于建筑业疲软造成的塔机业的不景气, 上海波赫驱动系统有限公司我国的塔机业正处于一个迅速的发展时期。 从塔机的技术发展方面来看，虽然新的产品层出不穷，新产品在生产效能、操作简便、保养容易和运行可靠方面均有提高，但是塔机的技术并无根本性的改变。塔机的研究正向着组合式发展。所谓的组合式，就是以塔身结构为核心，按结构和功能特点，将塔身分解成若干部分，并依据系列化和通用化要求，遵循模数制原理再将各部分划分成若干模块。根据参数要求，选用适当模块分别组成具有不同技术性能特征的塔机，以满足施工的具体需求。推行组合式的塔机有助于加快塔机产吕开发进度，节省产品开发费用，并能更好的为客户服务。 塔机分为上回转塔机和下回转塔机两大类。其中前者的承载力要高于后者，在许多的施工现场我们所见到的就是上回转式上顶升加节接高的塔机。按能否移动又分为：走行式和固定式。固定式塔机塔身固定不转，安装在整块混凝土基础上，或装设在条形式X 形混凝土基础上。在房屋的施工中一般采用的是固定式的。 设备特点和安全装置 塔式起重机的动臂形式分水平式和压杆式两种。动臂为水平式时，载重小车沿水平动臂运行变幅，变幅运动平衡，其动臂较长，但动臂自重较大。动臂为压杆式时，变幅机构曳引动臂仰俯变幅，变幅运动不如水平式平稳，但其自重较小。 为了确保安全，塔式起重机具有良好的安全装置，如起重量、幅度、高度和载荷力矩等限制装置，以及行程限位开关、塔顶信号灯、测风仪、防风夹轨器、爬梯护身圈、走道护栏等。司机室要求舒适、操作方便、视野好和有完善的通讯设备。 塔式起重机的检验产要点 1) 检查金属结构情况特别是高强度的螺栓，它的连接表面应清除灰尘、油漆、没迹和锈蚀，并且使用力矩手或专用扳手，按装配技术要求拧紧。 2) 检查各机构传动系统，包括各工作传动机构的轴承间隙是否合适，齿轮啮合是不是良好及制动器是否灵敏。 3) 检查钢丝绳及滑轮的磨损情况，固定是否可靠。 4) 检查电气元件是否良好，名接触点的闭合程度，接续是否正确和可靠。 5) 检查行走轮与轨道接触是否良好，夹轨钳是否可靠。装设附着装置、内爬装置时，各连接螺栓及夹块是否牢固可靠。
附录 INTEGRATION OF MACHINERY （From ELECTRICAL AND MACHINERY INDUSTRY）ABSTRACT Machinery was the modern science and technology development inevitable result, this article has summarized the integration of machinery technology basic outline and the development background .Summarized the domestic and foreign integration of machinery technology present situation, has analyzed the integration of machinery technology trend of development. Key word：integration of machinery ，technology，present situation ，product t，echnique of manufacture ，trend of development 0. Introduction modern science and technology unceasing development, impelled different discipline intersecting enormously with the seepage, has caused the project domain technological revolution and the transformation .In mechanical engineering domain, because the microelectronic technology and the computer technology rapid development and forms to the mechanical industry seepage the integration of machinery, caused the mechanical industry the technical structure, the product organization, the function and the constitution, the production method and the management system has had the huge change, caused the industrial production to enter into “the integration of machinery” by “the machinery electrification” for the characteristic development phase. 1. Integration of machinery outline integration of machinery is refers in the organization new owner function, the power function, in the information processing function and the control function introduces the electronic technology, unifies the system the mechanism and the computerization design and the software which constitutes always to call. The integration of machinery development also has become one to have until now own system new discipline, not only develops along with the science and technology, but also entrusts with the new content .But its basic characteristic may summarize is: The integration of machinery is embarks from the system viewpoint, synthesis community technologies and so on utilization mechanical technology, microelectronic technology, automatic control technology,
本科毕业论文(设计) 外文翻译 学院：机电工程学院 专业：机械工程及自动化 姓名：高峰 指导教师：李延胜 2011年05 月10日 教育部办公厅 Failure Analysis，Dimensional Determination And
Analysis，Applications Of Cams INTRODUCTION It is absolutely essential that a design engineer know how and why parts fail so that reliable machines that require minimum maintenance can be designed．Sometimes a failure can be serious，such as when a tire blows out on an automobile traveling at high speed．On the other hand，a failure may be no more than a nuisance．An example is the loosening of the radiator hose in an automobile cooling system．The consequence of this latter failure is usually the loss of some radiator coolant，a condition that is readily detected and corrected．The type of load a part absorbs is just as significant as the magnitude．Generally speaking，dynamic loads with direction reversals cause greater difficulty than static loads，and therefore，fatigue strength must be considered．Another concern is whether the material is ductile or brittle．For example，brittle materials are considered to be unacceptable where fatigue is involved． Many people mistakingly interpret the word failure to mean the actual breakage of a part．However，a design engineer must consider a broader understanding of what appreciable deformation occurs．A ductile material，however will deform a large amount prior to rupture．Excessive deformation，without fracture，may cause a machine to fail because the deformed part interferes with a moving second part．Therefore，a part fails(even if it has not physically broken)whenever it no longer fulfills its required function．Sometimes failure may be due to abnormal friction or vibration between two mating parts．Failure also may be due to a phenomenon called creep，which is the plastic flow of a material under load at elevated temperatures．In addition，the actual shape of a part may be responsible for failure．For example，stress concentrations due to sudden changes in contour must be taken into account．Evaluation of stress considerations is especially important when there are dynamic loads with direction reversals and the material is not very ductile． In general，the design engineer must consider all possible modes of failure，which include the following． ——Stress ——Deformation ——Wear ——Corrosion ——Vibration ——Environmental damage ——Loosening of fastening devices
机械类外文翻译 塑料注塑模具浇口优化 摘要:用单注塑模具浇口位置的优化方法，本文论述。该闸门优化设计的目的是最大限度地减少注塑件翘曲变形，翘曲，是因为对大多数注塑成型质量问题的关键，而这是受了很大的部分浇口位置。特征翘曲定义为最大位移的功能表面到表面的特征描述零件翘曲预测长度比。结合的优化与数值模拟技术，以找出最佳浇口位置，其中模拟armealing算法用于搜索最优。最后，通过实例讨论的文件，它可以得出结论，该方法是有效的。 注塑模具、浇口位臵、优化、特征翘曲变形关键词: 简介 塑料注射成型是一种广泛使用的，但非常复杂的生产的塑料产品，尤其是具有高生产的要求，严密性，以及大量的各种复杂形状的有效方法。质量ofinjection 成型零件是塑料材料，零件几何形状，模具结构和工艺条件的函数。注塑模具的一个最重要的部分主要是以下三个组件集:蛀牙，盖茨和亚军，和冷却系统。拉米夫定、Seow(2000)、金和拉米夫定(2002) 通过改变部分的尼斯达到平衡的腔壁厚度。在平衡型腔充填过程提供了一种均匀分布压力和透射电镜,可以极大地减少高温的翘曲变形的部分～但仅仅是腔平衡的一个重要影响因素的一部分。cially Espe,部分有其功能上的要求,其厚度通常不应该变化。 pointview注塑模具设计的重点是一门的大小和位臵,以及流道系统的大小和布局。大门的大小和转轮布局通常被认定为常量。相对而言,浇口位臵与水口大小布局也更加灵活,可以根据不同的零件的质量。 李和吉姆(姚开屏,1996a)称利用优化流道和尺寸来平衡多流道系统为multiple 注射系统。转轮平衡被形容为入口压力的差异为一多型腔模具用相同的蛀牙,也存
附录A Portal power China’s rapid economic growth in the past decade has resulted in a big increase in freight traffic through the country’s seaports . Old ports are being expanded and new ports built to handle the large growth in container and bulk cargo traffic all along the Chinese coastline. China’s port expansion programme has provided a strong boost to the domestic port equipment industry, which has enjoyed a strong increase in demand for port cranes of various types, including container cranes and portal cranes along with bulk cargo handling equipment. State-run China Harbour Engineering (group) Corporation Ltd, established under the ruling State Council, is China’s largest supplier of port cranes and bulk cargo handling equipment. The organization controls both Shanghai Zhenhua Port Machinery Co Ltd (ZPMC),the world’s largest manufacturer of quayside container cranes, and Shanghai Port Machinery Plant (SPMP), which specializes in the manufacturer of portal cranes and other cranes used in ports along with dry bulk cargo handling equipment. SPMP’s main market is China, although the company is looking to expand its overseas sales. Although less well known than its associate ZPMC, SPMP also operates large manufacturing facilities, and is due to move part of its production shortly to Changxing Island near Shanghai where ZPMC already operates a large container crane fabrication plant. Portal and other harbour cranes are SPMP’s major production item. During the past two years, the corporation has won contracts for 145 portal cranes from port authorities throughout China, both from new ports under construction and ports undergoing expansion. In recent years, SPMP has also supplied portal cranes to the United States, Iraq,and Myanmar.The port Rangoon of Myanmar in has purchased a 47m,40t portal crane while BIW of the United States has purchased three cranes-15t,150t, and 300t portal
沈阳工业大学工程学院 毕业设计（论文）外文翻译 毕业设计（论文）题目：工具盒盖注塑模具设计 外文题目：Friction , Lubrication of Bearing 译文题目：轴承的摩擦与润滑 系（部）：机械系 专业班级：机械设计制造及其自动化0801 学生姓名：王宝帅 指导教师：魏晓波 2010年10 月15 日
外文文献原文： Friction , Lubrication of Bearing In many of the problem thus far , the student has been asked to disregard or neglect friction . Actually , friction is present to some degree whenever two parts are in contact and move on each other. The term friction refers to the resistance of two or more parts to movement. Friction is harmful or valuable depending upon where it occurs. friction is necessary for fastening devices such as screws and rivets which depend upon friction to hold the fastener and the parts together. Belt drivers, brakes, and tires are additional applications where friction is necessary. The friction of moving parts in a machine is harmful because it reduces the mechanical advantage of the device. The heat produced by friction is lost energy because no work takes place. Also , greater power is required to overcome the increased friction. Heat is destructive in that it causes expansion. Expansion may cause a bearing or sliding surface to fit tighter. If a great enough pressure builds up because made from low temperature materials may melt. There are three types of friction which must be overcome in moving parts: (1)starting, (2)sliding, and(3)rolling. Starting friction is the friction between two solids that tend to resist movement. When two parts are at a state of rest, the surface irregularities of both parts tend to interlock and form a wedging action. To produce motion in these parts, the wedge-shaped peaks and valleys of the stationary surfaces must be made to slide out and over each other. The rougher the two surfaces, the greater is starting friction resulting from their movement . Since there is usually no fixed pattern between the peaks and valleys of two mating parts, the irregularities do not interlock once the parts are in motion but slide over each other. The friction of the two surfaces is known as sliding friction. As shown in figure ,starting friction is always greater than sliding friction . Rolling friction occurs when roller devces are subjected to tremendous stress which cause the parts to change shape or deform. Under these conditions, the material in front of a roller tends to pile up and forces the object to roll slightly uphill. This changing of shape , known as deformation, causes a movement of molecules. As a result ,heat is produced from the added energy required to keep the parts turning and overcome friction. The friction caused by the wedging action of surface irregularities can be overcome
近几年，我厂和英国、西班牙的几个公司有业务往来，外商传真发来的图纸都是英文标注，平时阅看有一定的困难。下面把我们积累的几点看英文图纸的经验与同行们交流。 1标题栏 英文工程图纸的右下边是标题栏（相当于我们的标题栏和部分技术要求），其中有图纸名称（TILE）、设计者（DRAWN）、审查者（CHECKED）、材料（MATERIAL）、日期（DATE）、比例（SCALE）、热处理（HEAT TREATMENT）和其它一些要求，如： 1)TOLERANCES UNLESS OTHERWISE SPECIFIAL 未注公差。 2)DIMS IN mm UNLESS STATED 如不做特殊要求以毫米为单位。 3)ANGULAR TOLERANCE±1°角度公差±1°。 4)DIMS TOLERANCE±0.1未注尺寸公差±0.1。 5)SURFACE FINISH 3.2 UNLESS STATED未注粗糙度3.2。 2常见尺寸的标注及要求 2.1孔（HOLE）如： （1）毛坯孔：3"DIAO+1CORE 芯子3"0+1; （2）加工孔：1"DIA1"; （3）锪孔：锪孔(注C＇BORE=COUNTER BORE锪底面孔); （4）铰孔：1"/4 DIA REAM铰孔1"/4; （5）螺纹孔的标注一般要表示出螺纹的直径，每英寸牙数（螺矩）、螺纹种类、精度等级、钻深、攻深，方向等。如： 例1.6 HOLES EQUI-SPACED ON 5"DIA (6孔均布在5圆周上（EQUI-SPACED=EQUALLY SPACED均布） DRILL 1"DIATHRO＇ 钻1"通孔（THRO＇=THROUGH通） C/SINK22×6DEEP 沉孔22×6 例2.TAP7"/8-14UNF-3BTHRO＇ 攻统一标准细牙螺纹，每英寸14牙，精度等级3B级 （注UNF=UNIFIED FINE THREAD美国标准细牙螺纹） 1"DRILL 1"/4-20 UNC-3 THD7"/8 DEEP 4HOLES NOT BREAK THRO钻 1"孔，攻1"/4美国粗牙螺纹，每英寸20牙，攻深7"/8,4孔不准钻通（UNC=UCIFIED COARSE THREAD 美国标准粗牙螺纹）
毕业设计论文外文资料翻译 附件1：外文资料翻译译文 起重机的工作需要更多的科学技术 起重机的出现大大提高了人们的劳动效率，以前需要许多人花长时间才能搬动的大型物件现在用起重机就能轻易达到效果，尤其是在小范围的搬动过程中起重机的作用是相当明显的。 战后的前几年，世界性的工业诞生了，起重机行业几乎完全停止。然而到这个年代末，起重机的建造变得多元化并传播到世界各地，它的前所未有的蓬勃发展似乎整个工业注入了新能源。轻型起重机投入到工作地点并准备作为主要机械，因为人们意识到了在工作间不用拆除他们的的优点。这些新的设计也不再需要其他起重设备协助操纵——相比以前在安装前要进行繁琐的设计。但是，在这一切之前发生了恐怖的第二次世界大战。到1940年，欧洲完全陷入了战争中。到战争结束后的几十年来，欧洲和世界其他地区发生了巨大的政治，经济和社会变化，将影响整个社会结构，包括建造业和起重机行业。在美国，蒸汽机已开始改为柴油机——到1953年超过百分之五十的机车将使用柴油机。战争期间，挖掘机，铲运机和起重机的大规模生产在继续。例如1940年，看到Thew推出新的'Lorain Motocrane'系列。这其中包括三种起重机，是历史上首次自身安装了底盘的起重机。最小的MC - 2 ，起重量达7.6吨，MC – 2起重量为9.9吨，MC – 3起重量为13.5吨。这些起重机许多被用于军队，有的还安装在港口用作港湾式起重机（在MC - 4型）。当然，这场战争已经削弱了能在起重机行业工作的健壮的男人的数量，并且优秀的起重机司
机严重短缺。在Thew ，一位毕业于美国海军学院的经验丰富的技工A C Burch和L K Jenkins进行了为期两天的起重机业务课程的教授。这两位绅士好比是我们今天所知的―经营者培训‖的创始人。他们实际上已设计了动力起重机，都深深地了解起重机，并很高兴传授这方面的知识。 当日本国家铁路公司致力于采购一种旨在搬动钢轨扣板的原型机，潮流逆转。该设备工作极为出色。iVlasuo Tadano环游日本，用35毫米的电影展示该设备的强大用途。沿路上，他获取了大量订单。同时，他好像成为当今市场营销专家所宠爱的公司影像传播的先驱！ 其他国家也在大力发展起重机。特别是意大利，逐渐发展成为该行业的创新基地。1948年Carlo Raimodi在米兰附近的Legnano，首次建造了回转塔式起重机，一种经典的顶端回转起重机。公司最初成立于1863年，在生产起重机之前，是一间铸造厂并为技工和其他行业生产机械设备。当时全球建筑业空前繁荣，吸引了专业设备制造商的注意。其中许多公司在推广起重机后，推出了混凝土搅拌设备。提供了多种不同组合，例如，Reich， Ibag和Liebherr设计开发了起重机与混凝土搅拌设备一起使用的组合。 桥式起重机小车运行机构设计主要包括起升机构、小车架、小车运行机构、吊具等部分。其中的小车运行机构主要由减速器、主动轮组、从动轮组、传动轴和一些连接件组成。桥式起重机是水电站桥式起重机，安装于丰满水电站扩建工程厂房内，用于水轮发电机组及其附属设备的安装和检修工作。水电站内设备一般都是大中型设备，对桥式起重机的载荷要求较高，所以对减速器性能要求较高。 桥式抓斗起重机是桥架在高架轨道上运行，由起重小车带动抓斗抓取物料的一种桥架型起重机。桥架沿铺设在两侧高架上的轨道纵向运行，起重小车沿铺设在桥架上的轨道横向运行，构成矩形的工作范围，就可以充分利用桥架下面的空间吊运物料，不受地面设备的阻碍。桥式抓斗起重机广泛应用于电厂、煤厂等需要散料装卸的场合，由于该设备笨重，运输安装困难，对其产品质量检测一般需要在现场进行。所以要求控制设备接线方便，体积小便于携带。又由于使用现场条件不动，还要求检测设备有随机手动控制功能，以保证运行时的安全。随着对起重运输机械控制要求的不断提高,控制手段也越来越先进。目前国内的桥式起重机控制系统都需要人在现场进行控制，控制方式都比较落后。在中小型起重机中, 大都采用控制器直接控制大、小车运行, 主、副钩提升、下降重物及调速。