【正文】
運(yùn)行結(jié)果為 ( C ) 。 3. 近一、二十年,機(jī)械工業(yè)取得巨大進(jìn)步的特點(diǎn)是采用了 ( D )。 CNC系統(tǒng)組成中 ,核心部分為 ( C )。 11. CIMS所研究的對(duì)象是 ( D )。 A. x C. z D. (yz) 15.決策樹(shù)又叫判定樹(shù),它不包括 ( B )。 A.零件的材料 B.特征矩陣 C.典型工藝 D.零件的種類(lèi) 19.在 CIMS中,物料需求計(jì)劃簡(jiǎn)稱為( A )。 A.線性表 B.樹(shù) C.二叉樹(shù) D.圖 ,按鈕構(gòu)件為( B )。 系統(tǒng)一般分為 檢索式 、派生式和 創(chuàng)成式 3 種系統(tǒng)。 三 、 名詞解釋 1. 計(jì)算機(jī)輔助工藝過(guò)程設(shè)計(jì) (CAPP) 2. 數(shù)字控制( NC) 3. 零件程序 4. 后置處理程序 5. 數(shù)控技術(shù) 6. LISP 7. 計(jì)算機(jī)數(shù)控系統(tǒng)( CNC 系統(tǒng)) 答案參考 三 、 名詞解釋 題 1. 計(jì)算機(jī)輔助工藝過(guò)程設(shè)計(jì) (CAPP):是通過(guò)向計(jì)算機(jī)輸入被加工零件的幾何信息和加工工藝信息,由計(jì)算機(jī)自動(dòng)輸出零件的工藝路線及工序內(nèi)容等工藝文件的過(guò)程。 5. 數(shù)控技術(shù):是 用數(shù)字化信息對(duì)機(jī)床的運(yùn)動(dòng)及其加工過(guò)程進(jìn)行控制的一種技術(shù)。手工編程使用一般的計(jì)算工具,以各種數(shù)學(xué)方法人工進(jìn)行運(yùn)算和編制指令, 速度慢。 答:數(shù)據(jù)是描述客觀事物的數(shù)字、字符 及所有能輸入到計(jì)算機(jī)并可被計(jì)算機(jī)接受和處理的各種符號(hào)的集合。 答:數(shù)控機(jī)床具有對(duì)加工對(duì)象適應(yīng)性強(qiáng)、自動(dòng)化程度高、加工精度高且加工質(zhì)量穩(wěn)定、生產(chǎn)效率高、易于建立計(jì)算機(jī)通訊網(wǎng)絡(luò)等特點(diǎn)。 創(chuàng)成法是由計(jì)算機(jī)軟件系統(tǒng),根據(jù)輸入的或直接從 cad 系統(tǒng)獲得的零件信息,依靠系統(tǒng)中的工藝數(shù)據(jù)和各種工藝決策自動(dòng)設(shè)計(jì)出工藝規(guī)程。 7233 機(jī)械 CAD/CAM 第 5 頁(yè) 共 5 頁(yè) Visafree policy brings Chengdu biz, tourism boost. Making national headlines several times, Chengdu39。s ancient indigenous religion, while Du jiang yan is considered to be the oldest functioning watercontrol project in the world. Chengdu ranked third in tourist facilities, management and services among 60 Chinese cities in a customer satisfaction survey released last year. But, Li added that efforts are still needed to develop more tourism products, improve English services and provide accurate translation of traffic signs and scenic billboards. Zhao Yun, chairwoman of British Chamber of Commerce Southwest China, told China Daily that his colleagues found the policy very convenient. A British client once flew here and stayed for just one day to check her ordered goods, she said. Zhao was born in Shanxi province, but she has lived in C