畢業(yè)論文-ca6140車(chē)床的數(shù)控改造—進(jìn)給系統(tǒng)的改造(存儲(chǔ)版)
【正文】 Tq＞T2∑由文獻(xiàn)【1】表3—7可知，Tq／Tjmax＝0．87，則Tq＝0．877．84＝6．82(Nm)，故選用合適。由于絲杠承受袖向載荷，又由于采取了一定的預(yù)緊措施，故滾珠絲杠會(huì)產(chǎn)生摩擦阻力矩。設(shè)減速比為i，則 i＝假設(shè)采用的切削用量范圍：v＝／s；ap＝5mm；f＝，則其主切削力(可根據(jù)切削原理近似公式計(jì)算)Fz＝3000N(垂直向)，取Fx＝ Fz＝1800N(縱向)，F(xiàn)y＝ Fz＝1500N(橫向)(根據(jù)機(jī)床設(shè)計(jì)手冊(cè)在一般車(chē)外因時(shí)只，F(xiàn)x＝(～) Fz，F(xiàn)、＝(～) Fz。沒(méi)有振動(dòng)，提高了工件表面加工質(zhì)量，延長(zhǎng)了刀具使用壽命。普通車(chē)床的進(jìn)給傳動(dòng)多半為齒輪傳動(dòng)，隨著進(jìn)給變換級(jí)數(shù)的增多，齒輪對(duì)數(shù)和操縱機(jī)構(gòu)顯著增加。當(dāng)轉(zhuǎn)位完成,霍爾元件反饋, 控制電機(jī)反轉(zhuǎn),夾緊完成。 圖12 CA6140傳動(dòng)結(jié)構(gòu)圖第二章 總體改造方案根據(jù)實(shí)際工況，CA6140型車(chē)床的數(shù)控化改造方案如下： 1 數(shù)控系統(tǒng)選用南京產(chǎn)J WK 15T 型數(shù)控系統(tǒng) 一般小型機(jī)床的數(shù)控化改造多半采用開(kāi)環(huán)控制方式。此外，還可以車(chē)削大導(dǎo)程、非標(biāo)準(zhǔn)和較精密的螺紋。b中低速傳動(dòng)路線 主軸VI上的滑移齒輪Z50處于右邊位置，且使齒式離合器M2接合，運(yùn)動(dòng)經(jīng)軸IIIIVV間的背輪機(jī)構(gòu)和齒輪副傳給主軸。絲杠與光杠：用以聯(lián)接進(jìn)給箱與溜板箱，并把進(jìn)給箱的運(yùn)動(dòng)和動(dòng)力傳給溜板箱，使溜板箱獲得縱向直線運(yùn)動(dòng)。我國(guó)是一個(gè)發(fā)展中國(guó)家,無(wú)論從數(shù)控技術(shù)水平和機(jī)床的數(shù)控化率都落后于先進(jìn)的西方發(fā)達(dá)國(guó)家,特別是從上個(gè)世紀(jì)后期,國(guó)家采取了積極的財(cái)政政策和擴(kuò)大內(nèi)需的方針后,作為現(xiàn)代基礎(chǔ)機(jī)械的數(shù)控機(jī)床就滿足不了工廠逐年增加的生產(chǎn)需求。我國(guó)是制造業(yè)大國(guó)，但不是強(qiáng)國(guó)。所以采用此方法對(duì)中、小型企業(yè)來(lái)說(shuō)是十分理想的選擇。而普通機(jī)床已不適應(yīng)多品種、小批量生產(chǎn)要求，數(shù)控機(jī)床則綜合了數(shù)控技術(shù)、微電子技術(shù)、自動(dòng)檢測(cè)技術(shù)等先進(jìn)技術(shù)，最適宜加工小批量、高精度、形狀復(fù)雜、生產(chǎn)周期要求短的零件。【關(guān)鍵詞】： CA6140車(chē)床 數(shù)控化改造 進(jìn)給系統(tǒng) 刀架AbstractThe enterprise must be changeable in the current market demand, petes in the intense environment the survival and the development needs rapidly the renewal and the development new goods e into the market the product, by the lowest price, the best quality, the shortest time satisfies the market demand the unceasing change. But the ordinary engine bed unsuitable multi varieties, the small volume production request, the numerical control engine bed synthesized the numerical control technology, the micro electron technology, the automatic detection technology and so on the advanced technology, most is suitable processes the small batch, the high accuracy, the shape is plex, the production cycle requests the short ponents. When change processing object only needs to trade the ponents processing procedure, does not need to make any adjustment to the engine bed, therefore can satisfy the product frequent change well the processing request. If engine bed equipment pletely renewal, not only fund investment is too big, the cost is too high, moreover the original equipment will leave unused creates the enormous waste. Therefore the most economical means are carry on the ordinary engine bed the numerical control transformation. Use the numerical control transformation technology, not only was allowed to cause the transformation of the engine bed to meet the technological development needs, enhanced the productivity and the pro
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