1.引 言 數(shù)控的定義是:用數(shù)字化信號對機床運動及其加工過程進行控制的一種方法。數(shù)控技術(shù)水平的高低和數(shù)控設(shè)備的擁有量是衡量國家工業(yè)現(xiàn)代化的重要標志之一。數(shù)控加工集傳統(tǒng)的機械制造、計算機、現(xiàn)代控制、傳感檢測、信息處理、光電技術(shù)于一體,是現(xiàn)代技術(shù)的基礎(chǔ)。數(shù)控技術(shù)的發(fā)展依據(jù)計算機輔助技術(shù)(CAD),輔助制造(CAM),輔助工程分析(CAE)發(fā)展的。UG是集成CAD、CAM、CAE、一體化的三維參數(shù)化軟件。它已成為世界上最優(yōu)秀的公司廣泛使用的軟件系統(tǒng)之一。以其先進的理論基礎(chǔ),強大的工程背景,完善的功能和專業(yè)化的服務(wù) 國用 的 ,成為 國高CAD CAM CAE系統(tǒng)的 。UG的功能 的 發(fā)過程, 設(shè)計,功能過程,分析 制造的工程 、 、機械、 和家用電 方 用廣泛。?¢ 是 £?件標¥化的基礎(chǔ)上發(fā)展? 的一種§currency1的工'“備。它?一??先制fi的、有fl種 –??、 –· ??的標¥化?件和 ?件? 成?!??件…‰ ??分??? 高、` 高和′??fi,ˉ?有完˙的‰¨?。 用”??件,?據(jù)?加工工件的工'要 ,?以?ˇ— “ 機械加工及檢 、“ fl工種用 的¢ ?!?使用完 ,?以方 — ?件, ?件 ,?以 “§¢ 使用。 ?¢ ?a 使用, ¥備??,?高 o , 加工 量, 低 成?。 機床、 制造、 ?機械、化工機械、 工機械、 ?、?? 械以及 電? ?、 制造行業(yè)的機械加工和 壓加工 ?以廣泛使用 ?¢ 。 多 種、小批量 及§ 試制 ,使用 ?¢ 經(jīng)濟o果更為顯著。? 業(yè)設(shè)計?據(jù)設(shè)計任務(wù)書的要 ,通過UG建立£件的三維實體 currency1,編制數(shù)控加工工'·程,ˉ?UG 成?需要的數(shù)控加工程序。 用仿真軟件 進行£件數(shù)控加工仿真,檢查是否有錯,然 投 實際 。 ?¢ ?分,則通過對£件鉆孔定位的工'分析,選擇 ??件,然 進行 ?¢ 拼“。 而,完成 業(yè)設(shè)計任務(wù)書?·定的設(shè)計內(nèi)容。限于 人水平,此次設(shè)計難免 足之處,敬請老師指教。第1頁2.鉆孔用 ?¢ 拼“設(shè)計2.1 ?¢ 的特??¢ ?一??先¥備fi的fl種 –??, –??· 和 –· currency1號的標¥?件與 ?件? 成,??據(jù)工件和工序要 “ 成fl種機床¢ 。 ¢ 用完 , ¢ ,經(jīng)過 、油封 ? ,需要 再重§ “成其他¢ 。1. 類currency1 看, ?¢ 的特點決定 他是適用于 變化較大的 。如§ 試制,單件小批量和臨 突擊 任務(wù) 。對于成批 類currency1的 間,也?以 用 ?¢ 以外補充專用¢ 數(shù)量之 足。2. 加工的工種 看, ?¢ ?以用 鉆、 、鏜、銑、刨、?、檢 工種,其以鉆¢ 的用量最大。3. 加工工件的幾何??和?? 看, ?¢ 一般?以滿足fl種 –幾何??工件的要 。目前我國已大量采用 currency1系列的 ?¢ ?件。? currency1系列?件 “的 ?¢一般適用于加工長 30~500毫米和重量 50公斤以內(nèi)的工件。小currency1系列?件和大currency1系列?件的 ?¢ 也已 始推廣使用。4. 加工? 看,?于 ?¢ ?件的 ???? 一般為二級,因此 通常的 “技術(shù)水平下,采用 ?¢ 加工工件,?加工 的??? ? 三級。2.2 ?¢ 的?件及其作用?¢ 的?件按用 的 –分為八大類, :基礎(chǔ)件、支承件、定位件、導(dǎo)向件、壓緊件、緊固件、其他件和?件。1. 基礎(chǔ)件主要作¢ 體用,也是fl類?件安“的基礎(chǔ),通過定位鍵和槽用螺栓?定位和安“其他?件。如圖4-1圖4-1 基礎(chǔ)件2. 支承?件 包括fl種墊片,墊板,支承,角鐵墊板,菱?板,V?鐵 。支承件是 ?¢ 的 ,主要作用 –高 的支承和 種定位支承平 一般 下,支承件和基礎(chǔ)件 – 成¢ 的¢ 體。 “小currency1¢ ,有?支承件也?作為基礎(chǔ)件用,使 “的¢ 較 。支承?件的??? 和? 光 ?高,因此fl 與其他?件 ? 定位、導(dǎo)向 ? 。如圖4-2第2頁圖4-2 支承件3. 定位?件 有定位鍵、定位 、定位 、fl種定位支 、定位支承、鏜孔支承、對位 及fl種 。定位?件主要用 “ 定fl?件之間 ?件與工件之間的…對位 , 而 “¢ 的 “? 。此外 能 加?件之間的 強 和 ¢ 的 。定位鍵 ?¢ “ 用量?大,他有 鍵和T?鍵 種, currency1系列?件 它的 ???B=12 -0.012 毫米。主要用于 定 “ fl?件間的…‰位 ,ˉ能承 外 。定位鍵 為T8A, ` HRC48~54,, 低于鍵槽` ,? 其他?件上的定位槽的作用。定位 和定位 有 ?和菱?的,主要用于工件的內(nèi)孔定位。它與工件孔的 ?為D/db。如圖4-3圖4-3 定位件4. 導(dǎo)向?件,它包括fl種 ?和· 的鉆 板、鉆?和導(dǎo)向支承 。導(dǎo)向?件主要用 定孔加工 ¢ 與工件的…對位 , 加工 ?£導(dǎo)¢ 的作用。有 也??定位作用。圖4-4鉆 板是 “鉆¢ 的主要?件,一種鉆 板的定位孔?于一¥, “成?§currency1,適用于加工較小孔'的工件。定位孔 間的“為 孔鉆 板,適用于 “成?currency1鉆 ,”? 強 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