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畢業(yè)設(shè)計汽車儀表盤的逆向設(shè)計-wenkub

2022-09-21 06:42:31 本頁面
 

【正文】 ,裝配容易,拆卸方便,但其缺點是裝 配不是很牢固。 (12) 塑膠產(chǎn)品的裝配形式: ① 超聲線接合裝配法,其特點是模具上容易做到,但裝配工序中需專門的超聲機器,成本增大 ,且不能拆卸。 ( 9) 文字: 塑料產(chǎn)品表面的文字可以是凸字也可以是凹字,凸字在模具上做相應(yīng)的凹腔容易做到,凹字在模具上要做凸型心較困難。當(dāng)塑膠產(chǎn)品設(shè)計有嵌件時,要考慮嵌件在模具內(nèi)必須能完全、準(zhǔn)確、可靠的定位,還要考慮嵌件必須與成型部分連接牢固,當(dāng)包膠太薄時則不容易牢固。當(dāng) BOSS 和柱子(或另一 BOSS)配合時,其配合間隙通常取單邊 的裝配間隙,以便適合各 BOSS 加工時產(chǎn)生的位置誤差。與模具開模方向平行的孔在模具上通常汽車儀表盤的逆向設(shè)計 2 上是用型心(可鑲、可延伸留)或碰穿、插穿成型,與模具開模方向不平行的孔通常要做行位或斜頂,在不影響產(chǎn)品使用和裝配的前提下,產(chǎn)品側(cè)壁的孔在可能的情況下也應(yīng)盡量做成能用碰穿、插穿成型的孔。 ( 4) 圓角( R 角):塑膠產(chǎn)品除特殊要求指定要銳邊的地方外,在棱邊處通常都要做圓角,以便減小應(yīng)力集中、利于塑膠的流動和容易脫模。 ( 3) 脫模斜度:塑料產(chǎn)品都要做脫模斜度,但高度較淺的(如一塊平板)和有特殊要求的除外(但當(dāng)側(cè)壁 較大而又沒出模斜度時需做行位)。而且膠位要盡可能的均勻,在不得已的情況下,局部地方可適當(dāng)?shù)暮褚稽c或薄一點,但需漸變不可突變,要以不縮水和能走滿膠為原則,一般塑 料膠厚小于 時就很難走膠,但軟膠類和橡膠在 的膠厚時也能走滿膠。 reverse design。 關(guān)鍵 詞:汽車儀表盤;信息顯示;發(fā)展趨勢; 逆向設(shè)計; CATIA 汽車儀表盤的逆向設(shè)計 II Abstract Car dashboards, not only to reflect the car39。 同時 CAD/CAE/CAM 技術(shù)的發(fā)展與應(yīng)用,以及塑料模具工藝技術(shù)的改進,新材料的應(yīng)用,這些都對 汽車儀表盤的設(shè)計提出了新的要求。汽車儀表盤的逆向設(shè)計 I 摘 要 汽車儀表盤不僅能反映汽車的造型風(fēng)格,而且還是汽車上重要的信息顯示窗口,能集中、直觀、即時、準(zhǔn)確地提供汽車在行駛過程中的各種動態(tài)狀況,讓駕駛?cè)藛T可以通過汽車儀表不斷反饋的信息,對汽車進行適時有效的控制:汽車儀表是駕駛?cè)藛T與汽車進行信息交流和互動的重要界面。 而其中的逆向設(shè)計,因能縮短設(shè)計周期降低設(shè)計成本,在汽車儀表盤的設(shè)計中得到了越來越廣泛的應(yīng)用。s styling, but also important information in the car window, focused, intuitive, realtime, accurate delivery of the car in the process of moving a variety of dynamic conditions, so that drivers can continue through the car dashboard feedback, timely and effective control of the car: the car dashboard to the driver and vehicle information munication and interaction interface. The pursuit of better things, making the modern instrument panel shape and gradually focus on beauty. Design beautiful lines, smooth surface, very dynamic, stitched together by the free surface of the dashboard has bee the inevitable trend of development of the dashboard. The development and application of CAD / CAE / CAM technology, as well as plastic mold technology improvements, the application of new materials, which are on the car dashboards, design the new requirements. The reverse design, because it can shorten the design cycle to reduce design costs in the design of the car dashboard more widely used. CATIA the reverse design of the software ,because of its strong surface module and reverse modules, much of the designers of all ages. How to better the reverse design of the instrument, as well as more standardized reverse design flow, is the designers to actively explore the research topic. Keywords: car dashboard。 CATIA 汽車儀表盤的逆向設(shè)計 III 目 錄 摘 要 ..................................................................................................................................... I Abstract .................................................................................................................................... II 1緒論 .................................................................................................................................... 1 塑料件成型工藝 ..................................................................................................... 1 塑料件的結(jié)構(gòu)設(shè)計 ................................................................................... 1 塑料件成型方法 .......................................................................................... 3 逆向工程的發(fā)展概述 ............................................................................................. 5 逆向設(shè)計軟件 CATIA ......................................................................................... 7 CATIA 軟件的簡介 .................................................................................. 7 CATIA 的逆向設(shè)計模塊 .......................................................................... 8 本論文研究目的和工作內(nèi)容 ................................................................................. 8 2 汽車儀表盤概述 ............................................................................................................. 10 汽車儀表盤簡介 ................................................................................................ 10 汽車儀表盤定義 ...................................................................................... 10 汽車儀表盤各符號的含義 ..................................................................... 10 汽車的組合儀表及工作原理 ............................................................................... 13 汽車儀表盤的計流程 ........................................................................................... 14 風(fēng)格造型 .................................................................................................. 14 結(jié)構(gòu)及特征設(shè)計 ...................................................................................... 16 零件詳細設(shè)計 ......................................................................................... 16 裝配設(shè)計 .................................................................................................. 17 儀表板總成開發(fā)流程圖 .......................................................................... 17 汽車儀表盤的發(fā)展趨勢 .................................................................................... 18 3 汽車儀表盤的逆向設(shè)計 ................................................................................................. 20 點云的采集 .......................................................................................................... 20 點云的前期處理及三角化 .................................................................................. 21 逆向建模 .............................................................................................................. 23 逆向各曲面 ............................................................................................. 23 帶參倒角 ................................................................................................. 27 實體加厚 ................................................................................................. 29 4 設(shè)計數(shù)模的審查確
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