數(shù)控技術(shù)外文翻譯-數(shù)控設(shè)計-資料下載頁
2025-05-12 01:27本頁面
【導(dǎo)讀】能由數(shù)字、字符和符號等進(jìn)行控制。這些數(shù)字、字符和符號等北邊麻城按一定格式。定義的指令程序，用于特定的加工或工作。美國標(biāo)準(zhǔn)信息交換代碼。一般來說，ASCII編碼的機(jī)床控制系統(tǒng)不能接受EIA編碼。當(dāng)然，這樣的問題已經(jīng)逐漸得到解決。數(shù)控加工制造目前已經(jīng)。床，電火花或線切割機(jī)床以及焊接機(jī)床，甚至彎管機(jī)也可采用數(shù)控加工技術(shù)。程序指令由一條一條的詳細(xì)指令組成，制造裝備按要求執(zhí)行這些指令。許多更高級的指令還包括主軸速度選擇，道具選擇及其他的一些功。數(shù)控技術(shù)系統(tǒng)主要有兩種類型：點對點數(shù)控系統(tǒng)和輪廓線數(shù)控系統(tǒng)。精確控制盒同步性能是非常重要的。輪廓線數(shù)控系統(tǒng)經(jīng)常應(yīng)用于車床、銑床、磨床、在所有的插補(bǔ)方法中，路徑控制是以刀具的旋轉(zhuǎn)中心為標(biāo)準(zhǔn)，在數(shù)控程序。數(shù)控程序可以由數(shù)控機(jī)床內(nèi)部的程序庫開發(fā)生成，也可以從外面采購獲得。數(shù)控程序包括一系列的指令系統(tǒng)和命令系統(tǒng)。計算機(jī)數(shù)控使用專用的微型計算機(jī)作為加工控制單元。
【正文】 irect connection and in real time. The tape reader is omitted in DNC, thus relieving the system of its least reliable 黃石理工學(xué)院 畢業(yè)設(shè)計（論文）外文文獻(xiàn)翻譯 7 ponent. Instead of using the tape reader, the part program is transmitted to the machine tool directly from the puter memory. In principle, one puter can be used to control more than 100 separate machines. The DNC puter is designed to provide instructions to each machine tool on demand. When the machine needs control mands, they are municated to it immediately. Since the introduction of DNC there have been dramatic advances in puter technology. The physical size and cost of a digital puter has been significantly reduced at the same time that its putational capabilities have been substantially increased. In numerical control, the result of these advances has been that the large hardwired MCUs of conventional NC have been replaced by control units based on the digital puter. Initially, miniputers were utilized in the early 1970s. As further miniaturization occurred in puters, miniputers were replaced by today’s microputers. Computer numerical control is an NC system using dedicated microputer as the machine control unit. Because a digital puter is used in both CNC and DNC, it is appropriate to distinguish between the two types of system. There are three principal differences: (1) DNC puters distribute instructional data to, and collect data form, a large number of machines. CNC puters control only one machine, or a small number of machines. (2) DNC puters occupy a location that is typically remote from the machines under their control. CNC puter are located very near their machine tools. (3) DNC software is developed not only to control individual pieces of production equipment, but also to serve as part of a management information system in the manufacturing sector of the firm. CNC software is developed to augment the capabilities of a particular machine tool.
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