外文文獻(xiàn)及翻譯--發(fā)動機(jī)零件及其工作原理和模具設(shè)計與制造-模具設(shè)計-資料下載頁
2025-05-12 12:20本頁面
【導(dǎo)讀】汽車要始終根據(jù)使用者的要求進(jìn)行設(shè)計。汽車上使用的發(fā)動機(jī)必須要重量輕并且燃。料損耗少，這是工程師設(shè)計各種類型發(fā)動機(jī)時主要考慮的兩個因素。汽車發(fā)動機(jī)可以是單缸的，單缸發(fā)動機(jī)只有一個氣缸，而多缸發(fā)動機(jī)有多個氣缸，單缸——?dú)飧卓赡苤绷幸部赡芩?；如今大多?shù)的汽車使用火花點(diǎn)火、四沖程、往復(fù)式汽油發(fā)動機(jī)。往復(fù)式汽油發(fā)動機(jī)每個氣缸內(nèi)都有一個圓形的活塞、一個連桿和一個曲軸。氣和燃油非常易燃，當(dāng)活塞到達(dá)它行程的頂端時燃油混合氣被點(diǎn)燃。脹氣體向下推，它又推動連桿使得曲軸旋轉(zhuǎn)，曲軸回轉(zhuǎn)產(chǎn)生能量推動汽車。往復(fù)式發(fā)動機(jī)的原因。氣口和排氣口，進(jìn)氣口允許空氣燃油混合氣流入氣缸，排氣口允許燃燒后的廢氣排出，CAD和CAM廣泛用于模具的設(shè)計和制造中。而CAM，從另一方面來說，能夠控制制造質(zhì)量。在選擇工藝順序時CAD數(shù)據(jù)將發(fā)揮關(guān)鍵的作用。而CAD系統(tǒng)的軟件部分由允許其完成設(shè)計和畫圖功能的程序組成。生多種特征時，CAM系統(tǒng)會為你構(gòu)建一個工藝規(guī)劃。
【正文】 One way to reduce the cost of manufacturing and reduce leadtime is by setting up a manufacturing system that uses equipment and personnel to their fullest potential. The foundation for this type of manufacturing system is the use of CAD data to help in making key process decisions that ultimately improve machining precision and reduce nonproductive time. This is called as puteraided manufacturing (CAM). [3] The objective of CAM is to produce, if possible, sections of a mould without intermediate steps by initiating machining operations from the puter workstation. With a good CAM system, automation does not just occur within individual features. Automation of machining processes also occurs between all of the features that make up a part, resulting in toolpath optimization. As you create features, the CAM system constructs a process plan for you. Operations are ordered based on a system analysis to reduce tool changes and the number of tools used. On the CAM side, the trend is toward newer technologies and processes such as micro milling to support the manufacturing of highprecision injection moulds with 共 9 頁 第 8 頁 plex 3D structures and high surface qualities. CAM software will continue to add to the depth and breadth of the machining intelligence inherent in the software until the CNC programming process bees pletely automatic. This is especially true for advanced multifunction machine tools that require a more flexible bination of machining operations. CAM software will continue to automate more and more of manufacturing’s redundant work that can be handled faster and more accurately by puters, while retaining the control that machinists need. With the emphasis in the mould making industry today on producing moulds in the most efficient manner while still maintaining quality, mouldmakers need to keep up with the latest software technologiespackages that will allow them to program and cut plex moulds quickly so that mould production time can be reduced. In a nutshell, the industry is moving toward improving the quality of data exchange between CAD and CAM as well as CAM to the CNC, and CAM software is being more “ intelligent” as it relates to machining processes— resulting in reduction in both cycle time and overall machining time. Fiveaxis machining also is emerging as a“ musthave” on the shop floorespecially when dealing with deep cavities. And with the introduction of electronic data processing (EDP) into the mould making industry,new opportunities have arisen in mouldmaking to shorten production time,improve cost efficienciesand achieve higher quality. 共 9 頁 第 9 頁 指 導(dǎo) 教 師 評 語 外文翻譯成績： 指導(dǎo)教師簽字： 年 月 日 注： 1. 指導(dǎo)教師對譯文進(jìn)行評閱時應(yīng)注意以下幾個方面：①翻譯的外文文獻(xiàn)與畢業(yè)設(shè)計（論文）的主題是否高度相關(guān)，并作為外文參考文獻(xiàn)列入畢業(yè)設(shè)計（論文）的參考文獻(xiàn)；②翻譯的外文文獻(xiàn)字?jǐn)?shù)是否達(dá)到規(guī)定數(shù)量（ 3 000 字以上）；③譯文語言是否準(zhǔn)確、通順、具有參考價值。 2. 外文原文應(yīng)以附件的方式置于譯文之后。
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