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機械數(shù)控機床畢業(yè)設(shè)計93鏜削動力頭及主軸組件設(shè)計-免費閱讀

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【正文】 通過查閱資料了解到了很多平時課堂上沒有學(xué)到的有關(guān)金屬切削機床的一些相關(guān)知識。具體尺寸見《機械設(shè)計課程設(shè)計手冊》P154頁表11—10圖10—1 凸緣式軸承蓋其他軸承端蓋為了防止其他雜物進入,采用毛氈來密封。要保證箱體有足夠的強度,安裝方便,加工容易等特點,對箱體做如下設(shè)計:1)箱體采用HT250,它有較高的強度、減振性良好,鑄造性能良好。采用45鋼。因為:=30000h 所以經(jīng)過上面的校核計算,該軸承在使用期內(nèi),完全能夠滿足工作的需要,使用壽命足夠。 (6—9)公式出處——《材料力學(xué)》P188頁表6—1序號2=根據(jù)《金屬切削機床設(shè)計》P165頁相關(guān)資料建議,許用傾角=。查《機械制造裝備設(shè)計》P65頁表3—3選擇,前軸承的精度等級為P4,后軸承的精度等級為P5。因此主軸與軸IV之間的中心距同樣可以確定出來:              (4—6)公式出處——《機械設(shè)計》即: mm =132mm此處主要是齒輪向主軸傳遞轉(zhuǎn)矩,在次應(yīng)選擇周向固定的平鍵聯(lián)接。故在確定齒輪的寬度時,暫時以此齒輪進行設(shè)計計算。主軸采用45鋼,根據(jù)《機械設(shè)計》,如表3—3表3—3 軸強度計算公式中的系數(shù)C軸的材料Q235,20Q255,Q275,354540Cr,38SiMnMoC12160151482013525125301183511240106451025298由上表C取112。精度也可以很高,但制造困難單油楔軸承一般,多油楔軸承較高可以很高剛 度僅與軸承型號有關(guān),與轉(zhuǎn)速、載荷無關(guān),預(yù)緊后可提高一些隨轉(zhuǎn)速和載荷升高而增大與節(jié)流形式有關(guān),與載荷轉(zhuǎn)速無關(guān)承載能力一般為恒定值,高速時受材料疲勞強度限制隨轉(zhuǎn)速增加而增加,高速時受溫升限制與油腔相對壓差有關(guān),不計動壓效應(yīng)時與速度無關(guān)抗振性能不好,阻尼系數(shù)D=較好,阻尼系數(shù)D=很好,阻尼系數(shù)L=速度性能高速受疲勞強度和離心力限制,低中速性能較好中高速性能較好。主軸的剛度與材料的彈性模量E值有關(guān),剛的E值較大(10牛/厘米左右),所以主軸材料首先考慮用鋼料。查《機械加工工藝手冊》——9:得硬質(zhì)合金鏜刀的切削速度為Vmax=、 Vmin=。選擇通孔鏜刀,得到通孔鏜刀的外形參數(shù)B=12mm,H=12mm,L=12150mm, =60, d =12mm。其主要內(nèi)容包括選擇變速組及其傳動副數(shù),確定各變速組中的齒輪傳動比,以及計算齒輪齒數(shù),以及計算膠帶輪直徑等。ABSTACTThe main axle and its the main axle module, is the aggregatemachinetool core part, is performer which the aggregate machinetoolcarries on the processing, holds the quite important status in theaggregate machinetool developing process. A aggregate machinetoolprocessing precision mainly is decided by the power head and its themain axle module precision. Now, very many power heads basically already standardize, this for theengine bed manufacture, the reequipment has brought very bigconvenient, but in order to increase the precision, the workingefficiency, needed to design the specialpurposer power head part.The design of Boring is the main driving force for the first Boring VF6/7 air pressor on a valve Φby the hole. In the first design, dynamic process, which is mainly Boring processing required when cutting consumption, power sources, power transmission, Spindle assembly design. Finally, checking, checking dynamic design of the first reasonable The first Boring power structure simple and reliable and can be applied to the processing of Φ40200 mm hole, high precision machining, and General Dynamics pared to the first, simple and pact structure, we can better play the power plant capacity greatly improve labor productivity and accuracy. Through actual investigations, at present, the bination machine in a factory has a huge proportion require boring hole machining of parts is also a lot of volume, so Boring power head has plenty of room for development and broad application prospects. It will lower the cost of machine, greatly reducing the labor intensity, it would be easier to achieve automated production. Keywords : portfolio machine。一臺組合機床的加工精度主要取決于動力頭及其主軸組件的精度。通過實際調(diào)查,目前,組合機床在工廠中占有很大的比重,需進行鏜內(nèi)孔加工的零件數(shù)量也很多,所以,鏜削動力頭有很大的發(fā)展空間和廣闊的運用前景。逐漸在金屬切削機床中顯現(xiàn)出它獨有的特色,贏得很多機械制造工廠的青睞。定位基準(zhǔn)為:工件的下底面。 把上面的各個參數(shù)代入式(2—1)可得:n = = 200 r/min根據(jù)已知條件,要求鏜銷加工孔的范圍為Φ40—Φ200 mm。查《機械設(shè)計課程設(shè)計手冊》。故主軸軸承應(yīng)具有:旋轉(zhuǎn)精度高、剛度大、承載能力強、抗振性能高、摩擦功耗小、噪聲低和壽命長等特點。本組合機床的主軸結(jié)構(gòu)應(yīng)保證鏜刀的安裝可靠、定位準(zhǔn)確、連接鋼度高、裝卸方便并能傳遞足夠的轉(zhuǎn)矩;并考慮到該主軸的軸上零件的類型、數(shù)量、位置和安裝定位方法的因素以及加工工藝性和裝配工藝性。====?。剑剑?=====?。剑剑?=====通過對上式進行分析可以看出,傳動比與公比始終有整次方的關(guān)系,同時考慮到機床上各零件加工的方便,在這里我們?nèi)C床上各傳動齒輪的模數(shù)相同。mpa初步計算齒輪的直徑:            (4—3)查《機械設(shè)計》教材 P227  取=
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