摘 要
DNC（Direct Numerical Control/Distributed Numerical Control）即直接數(shù)字控制/分布式數(shù)字控制系統(tǒng)，是指數(shù)臺或多臺數(shù)控機(jī)床由一臺計(jì)算機(jī)統(tǒng)一分配控制程序和進(jìn)行管理。它是針對車間的生產(chǎn)計(jì)劃，技術(shù)準(zhǔn)備，加工操作等基本作業(yè)的集中監(jiān)控與分散控制相結(jié)合的車間生產(chǎn)控制系統(tǒng)。
本文實(shí)現(xiàn)了數(shù)控機(jī)床與DNC主機(jī)服務(wù)器，個(gè)人計(jì)算機(jī)（即PC機(jī)之間）與主機(jī)服務(wù)器以及數(shù)控機(jī)床與個(gè)人計(jì)算機(jī)之間的數(shù)據(jù)的通信問題。
本文實(shí)現(xiàn)的系統(tǒng)硬件部分是以高性能通用微機(jī)為主體，針對具有DNC接口的數(shù)控機(jī)床，實(shí)現(xiàn)了數(shù)控機(jī)床與DNC主機(jī)服務(wù)器，個(gè)人計(jì)算機(jī)（即PC機(jī)之間）與主機(jī)服務(wù)器以及數(shù)控機(jī)床與個(gè)人計(jì)算機(jī)之間的數(shù)據(jù)的通信。
系統(tǒng)操作軟件從輔助數(shù)控編程、數(shù)據(jù)庫管理、實(shí)時(shí)通訊三個(gè)方面加以實(shí)現(xiàn)。該軟件以Windows XP為操作平臺，以卡福制造車間信息化集成平臺為例對數(shù)控聯(lián)網(wǎng)設(shè)計(jì)進(jìn)行說明。
本文建立了任務(wù)訂單系統(tǒng)總流程圖、下傳NC程序流程圖和對試運(yùn)行生產(chǎn)過程作簡要地說明。得出就車間內(nèi)部的數(shù)據(jù)的傳遞的實(shí)現(xiàn)方法和實(shí)現(xiàn)過程。實(shí)現(xiàn)操作員在DNC客戶機(jī)上編寫程序，然后將程序傳送到數(shù)空機(jī)床上然后加工，首件合格后經(jīng)程序檢查員確認(rèn)，機(jī)床操作員將將此程序發(fā)送至DNC服務(wù)器的數(shù)據(jù)庫內(nèi),技術(shù)主管在客戶機(jī)上對此程序進(jìn)行批準(zhǔn)，完成歸檔管理。正式加工零件時(shí)利用遠(yuǎn)程調(diào)用功能直接在機(jī)床控制面板上從服務(wù)器內(nèi)下載。實(shí)現(xiàn)了對車間管理者、在線操作工人和NC程序編制者之間的實(shí)時(shí)的和可靠的數(shù)據(jù)傳遞從而提高車間級的生產(chǎn)力和生產(chǎn)效率。


關(guān)鍵詞:DNC系統(tǒng)，機(jī)床聯(lián)網(wǎng)，實(shí)時(shí)通訊，CAN現(xiàn)場總線








ABSTRACT

DNC (Direct Numerical Control/Distributed Numerical Control) is a system that using a computer to manage several or many Computer Numerical machine tools and distribute control program uniformly. It was a plant production control system that aimed at the plant's base tasks such as production planning, technology preparative process operations etc. In this passage we will discuss how to realize the communication between control panel and sever, between personal computer and the server and between control panel and personal computer.
The main system hardware are advanced universal computer, Computer controlled machine with DNC interface which realize the communication between control panel and sever, between personal computer and the server and between control panel and personal computer.
The main system soft wares are computer aided programming software, database manage software and real-time communication software. Those software are based on Windows XP manage system and information integrated platform of Carfour manufacturing shop floor which described the design of DNC sistem.
In this text, we has designed a order system flow chart，flow chart of NC program from server to client and briefly described running-in manufacture. From the passage we can realize the process of the communication of database between shop floors. Realize that the manipulators can write programmes at the DNC client. After that the NC programme can be delivered to numerical controlled machine and machining the part. After the first piece being put out, the programmer will check this piece. Then manipulators send the programmes to the database of DNC sever. The technical director approval the programme at the sever finishing the file management. When you machine the parts, you can make use of the remote using function which enable the control panel download the data from sever. The function realizes the reliable data communication among shop floor manager, online manipulator stuff and NC programmer which will improve shop floor productivity and efficiency.


Key words： DNC System, Network of Machine Tool, Real Time Communication, Field Bus technology
目 錄

中文摘要 Ⅲ
ABSTRACT Ⅳ
1緒論 1
1.1 數(shù)控機(jī)床DNC聯(lián)網(wǎng)的必要性 1
1.2 數(shù)控機(jī)床DNC聯(lián)網(wǎng)技術(shù)現(xiàn)狀及發(fā)展趨勢分析 1
1.2.1數(shù)控機(jī)床DNC聯(lián)網(wǎng)技術(shù)現(xiàn)狀及分析 1
1.2.2 數(shù)控機(jī)床DNC聯(lián)網(wǎng)及發(fā)展趨勢分析 2
1.3 課題研究的意義 3
1.4 小結(jié) 3
2 數(shù)控機(jī)床DNC聯(lián)網(wǎng)方案及關(guān)鍵技術(shù) 4
2.1 概述 4
2.2 數(shù)控機(jī)床聯(lián)網(wǎng)通訊方案 4
2.2.1 DNC點(diǎn)對點(diǎn)聯(lián)網(wǎng)方式-串行通訊技術(shù) 5
2.2.2 DNC局域網(wǎng)聯(lián)網(wǎng)方式-局域網(wǎng)通訊技術(shù) 5
2.2.3 DNC總線型聯(lián)網(wǎng)方式-總線型通訊技術(shù) 6
2.3 數(shù)控程序傳輸及接口技術(shù) 7
2.3.1 程序再開技術(shù) 8
2.3.2 實(shí)斷點(diǎn)、需斷點(diǎn)及再開點(diǎn)含義 8
2.3.3 DNC系統(tǒng)的CAD客戶機(jī)單元 8
3 DNC集成系統(tǒng)軟件的應(yīng)用 11
3.1 DNC系統(tǒng)軟件架構(gòu) 11
3.2 DNC 軟件功能應(yīng)用 11
3.2.1 DNC系統(tǒng)任務(wù)工單的生成與下發(fā) 11
3.2.2 DNC系統(tǒng)的CAPP單元 12
3.2.3 DNC系統(tǒng)的CAD客戶單元 12
3.2.4 DNC系統(tǒng)的程序的編制、上傳與下載 13
3.2.5 首件試加工與檢驗(yàn) 13
4 應(yīng)用案例分析 15
5 結(jié)論 32
致謝 32
參考文獻(xiàn) 32