電大機(jī)械cadcam期末復(fù)習(xí)試題參考小抄(編輯修改稿)
2025-07-09 08:07 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 、易于建立計(jì)算機(jī)通訊網(wǎng)絡(luò)等特點(diǎn)。主要組成有：主機(jī)、 CNC 裝置、驅(qū)動(dòng)裝置、輔助裝置、編程機(jī)及其附屬設(shè)備。 CAPP 系統(tǒng)與創(chuàng)成式 CAPP 系統(tǒng)的工作原理有何不同？ 答：派生法是以對(duì)標(biāo)準(zhǔn)工藝規(guī)程的 檢索和修改為基礎(chǔ)，而標(biāo)準(zhǔn)工藝是由有經(jīng)驗(yàn)的工藝人員制訂的。設(shè)計(jì)新零件工藝規(guī)程時(shí)要對(duì)標(biāo)準(zhǔn)工藝進(jìn)行檢索，并經(jīng)編輯和修改而得到。 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。 CAD/CAM 系統(tǒng)主要硬件配置及其特點(diǎn)。 答： CAD/CAM 系統(tǒng)硬件配置大致有 4 類：主機(jī)系統(tǒng)、成套系統(tǒng)、超級(jí)微型機(jī) CAD 工作站與個(gè)人計(jì)算機(jī)CAD 工作站。其中主機(jī)系統(tǒng)主要用于分析計(jì)算、數(shù)據(jù)處理，而超微型機(jī) CAD 工作站和 PC CAD 則具有較好的交互功能。 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 72hour visafree policy has attracted wide attention from both Chinese and foreign experts and businessmen since it took effect on Sept 1 last year. The program permits citizens from 51 countries and regions including the United States, Australia, Canada and Japan who have valid visas and flight tickets to a third country to spend three days in the city. The capital of Sichuan province is the first city in the western region of China to offer foreign tourists a threeday visa and the fourth nationwide to adopt the policy following Shanghai, Beijing and Guangzhou. Li Zhiyong, deputy dean of the tourism institute at Sichuan University, said the move contributes to a large increase in the number of overseas tourists and raises the city39。s level of internationalization. The poli cy will also bring direct economic revenue, Li said. Chengdu has many cultural legacies and is also a paradise for panda lovers with the world39。s largest breeding and research center. Three days are long enough for foreign visitors to visit those iconic tourist spots, he noted. The city is home to the remains of the Jin sha civilization that dates back more than 3,000 years as well as the Qing cheng Mountains and the Du jiang yan irrigation system. Qing cheng has long been recognized as the birthplace of Taoism, China39。s ancient indig
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