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本科畢業(yè)論文-引線片沖裁件沖裁工藝及模具設(shè)計(jì)-免費(fèi)閱讀

  

【正文】 s largest virgin forest, and known for its spring and ecological environment, Arxan is marveled at by many tourists as the purest land on earth. You cannot miss out the Autumn of Arxan. It is definitely the best with brightlycolored scenery full of emotions. Autumn in the northern part of the country es earlier than the South. A September rain followed by the footprints of Autumn brings more colors to the once emerald green mountain and blooming grassland. Shutterbugs flock to see for themselves the marvel of splendid colors around the mountains and waters, many of whom have travel a long distance and even camp here only to capture a moment of the nature wonder. The silver birch turns golden, while the larch is still proudly green. You will find yourself drowned in the intoxicating red of the wild fruits as well as the glamour of flowers in full blown. And your heart will be lingering on the woods as it39。經(jīng)過近三個(gè)月的努力,我相信這次畢業(yè)設(shè)計(jì)一定能為三年的大學(xué)生涯劃上一個(gè)圓滿的句號(hào),為將來走上工作崗位奠定堅(jiān)實(shí)的基礎(chǔ)。也使我學(xué)會(huì)了設(shè)計(jì)過程中對(duì)資料的查詢和運(yùn)用。 4 裝配上模 1) 在已裝好的下模上放等高墊鐵,再在凹模中放入 的紙片,然后將凸模與固定板組合裝入凹模; 2) 預(yù)裝上模座,劃出與凸模固定板相應(yīng)螺孔、銷孔位置并鉆鉸螺孔、銷孔; 3) 用螺釘將固定板組合、墊板 1上模座連在一起,但不要擰緊; 4) 將卸料板套裝在已裝入固定板的凸模上,裝上橡膠和卸料螺釘,并調(diào)節(jié)橡膠的預(yù)壓量,使卸料板高出凸模下端約 1mm; 5) 復(fù)查凸、凹模間隙并調(diào)整合適后,緊固螺釘; 6) 安裝導(dǎo)正銷、承料板; 引線片沖裁件沖裁工藝及模具設(shè)計(jì) 27 7) 切紙檢查,合適后打入銷釘。沖孔廢料和成品件均由漏料孔漏出。 :橡膠所產(chǎn)生的彈性壓力,設(shè)計(jì)時(shí)取大于或等于卸料力 N。 ? 的凸模: 8 11 50 2mm 。 ( 1)模具間隙 由于零件有平面度的要求,這里選用ⅱ類沖裁間隙,有表 320[2]查得 C=( 3~ 7)% t,即minC= =,maxC= = ( 2)落料凹模和沖孔凸模刃口的制造公差 落料凹模和沖孔凸模刃口的制造公差都按 IT7 級(jí) [4]選取,公差值由GB/[6]查得,則尺寸 、 、 、 由沖壓件尺寸公差按 IT14精度查表 38[5]查得偏差值,其具體值見下表 1。 方案三:四導(dǎo)柱模架。 ( 2)出件方式 因采用級(jí)進(jìn)模生產(chǎn),故采用向下落料出件。當(dāng)卸料板只起卸料作用時(shí)與凸模的間隙隨材料厚度的增加而增大,單邊間隙取( ~ ) t。 初選壓力機(jī) 由前述計(jì)算出沖裁工藝力,可得總的沖壓力 F總 F總 =F沖 裁+F卸=+=146194N 則選擇 J2325 開式壓力機(jī),主要參數(shù)如 ??3下 : 公稱壓力: 250000N; 最大閉合高度 :270mm, 最大裝模高度 :220mm; 閉合高度調(diào)節(jié)量 :55mm。 兩者比較得,采用橫截法利用率比較高些。 精度分析 圖示零件未標(biāo)注尺寸公差按 IT14 選取,即普通沖裁可以達(dá)到零件的精度要求。 在設(shè)計(jì)的過程中,雖然有一定的困難,但在指導(dǎo)老師的細(xì)心指導(dǎo)、同學(xué)間的討論和自己的努力下,自信會(huì)完滿的完成畢業(yè)設(shè)計(jì)任務(wù)。在這些工業(yè)部門中,沖壓件所占的比重相當(dāng)大。另?yè)?jù)統(tǒng)計(jì),我國(guó)(不含臺(tái)灣、香港、澳門地區(qū))現(xiàn)有模具生產(chǎn)廠點(diǎn)已超過 20210家,從業(yè)人員有 60萬人,模具年產(chǎn)值在一億以上的企業(yè)已達(dá)十多家。 ,達(dá)到多種綜合能力的培養(yǎng),掌握設(shè)計(jì)和科研的基本過程和基本方法。 Finally has analyzed the characteristic of the products, has advantaged to finite the mold design variable,the design main point and shedder. This design used piercing and blanking progressive die to form the forming principle can be divided to two stages: First, piercing punch and die affect together and pierce two holes of? and two holes of? ,then use the three holes as pinpoint to make the product formed. Key word Piercing and blanking progressive die Piercing punch Press Tonnage 引線片沖裁件沖裁工藝及模具設(shè)計(jì) 5 1 緒 論 目前,我國(guó)沖壓技術(shù)與工業(yè)發(fā)達(dá)國(guó)家相比還相當(dāng)?shù)穆浜?,主要原因是我?guó)在沖壓基礎(chǔ)理論及成形工藝、模具標(biāo)準(zhǔn)化、模具設(shè)計(jì)、模具制造工藝及設(shè)備等方面與工業(yè)發(fā)達(dá)的國(guó)家尚有相當(dāng)大的差距,導(dǎo)致我國(guó)模具在壽命、效率、加工精度、生產(chǎn)周期等方面與工業(yè)發(fā)達(dá)國(guó)家的模具相比差距相當(dāng)大。引線片沖裁件沖裁工藝及模具設(shè)計(jì) 1 目 錄 摘 要 ............................................................................................................................ 3 Abstract ......................................................................................................................... 4 1 、 緒 論 .................................................................................................................. 5 零件工藝性分析 ................................................................................................... 7 零件要求 ......................................................................................................... 7 材料分析 ....................................................................................................... 8 2. 3 結(jié)構(gòu)分析 .................................................................................................... 8 精度分析 ..................................................................................................... 8 工藝方案及工藝計(jì)算 ............................................................................................. 9 工藝方案確定 .................................................................................................. 9 工藝計(jì)算 .......................................................................................................... 9 ( 1)排樣設(shè)計(jì) .............................................................................................. 9 ( 2)沖裁工藝力的計(jì)算 ............................................................................ 11 初選壓力機(jī) .................................................................................................... 12 4 、 模具的總體設(shè)計(jì) ................................................................................................. 13 模具類型的選擇 ......................................................................................... 13 操作方式 ..................................................................................................... 13 卸料、出件方式 ......................................................................................... 13 ( 1)卸料方式 ............................................................................................ 13 ( 2)出件方式 ............................................................................................ 13 確定送料方式 ................................................................................................ 13 確定導(dǎo)向方式 ................................................................................................ 14 5 、 模具零件設(shè)計(jì)及標(biāo)準(zhǔn)件的選擇 ......................................................................... 15 工作零件設(shè)計(jì) ............................................................................................. 15 ( 1)模具間隙 ............................................................................................ 15 ( 2)落料凹模和沖孔凸模刃口的制造公差 ............................................ 15 ( 3)沖孔凸模 ............................................................................................ 16 ( 4)凹模采用整體式結(jié)構(gòu) .........................................
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