【正文】
5r/min; 軸Ⅱ的計(jì) 算轉(zhuǎn)速為 355r/min;軸Ⅰ的計(jì)算轉(zhuǎn)速為 710r/min。 于是 bi1? 22 / 62, bi2? 42 / 42, 得軸Ⅲ上兩齒輪的齒數(shù)分別為: 6 42。 于 是 ia1? 24 / 48, ia2? 30 / 42, ia3? 36 / 36 茂名職業(yè)技術(shù)學(xué)院 7 可得 軸 Ⅱ上的三聯(lián)齒輪齒數(shù)分別為: 4 4 36。下 面畫出轉(zhuǎn)速圖(電動機(jī)轉(zhuǎn)速與主軸最高轉(zhuǎn)速相近 )。 ③ 確定軸Ⅰ的轉(zhuǎn)速 對于 軸 Ⅰ,其級 指 a i1??? ?2? 1 / 2, a i2? 1/? ? 1/ , a i3? 1/ 1 確定 軸 Ⅰ轉(zhuǎn)速為 710r/min?,F(xiàn)由Ⅳ(主軸)開 始,確定Ⅰ、Ⅱ、Ⅲ軸的轉(zhuǎn)速: ① 先來確定 Ⅲ 軸的轉(zhuǎn)速 茂名職業(yè)技術(shù)學(xué)院 6 傳動組 c 的變速范圍 為 ?6? ? 8 ? Rmax∈ [8,10] 結(jié)合結(jié)構(gòu)式, Ⅲ 軸的轉(zhuǎn)速 只有一和可能 12 180、 250、 35 500、 710r/min。 在五根軸中,除去電動機(jī)軸,其余四軸按傳動順序依次設(shè)為Ⅰ、Ⅱ、Ⅲ、Ⅳ。 ⑵ 配總降速傳動比 總降速傳動比 i ? nmin / nd ? / 1440 ? 又電動機(jī)轉(zhuǎn)速 nd ? 1440r/ min 不符合轉(zhuǎn)速數(shù)列標(biāo)準(zhǔn),因而增加一定比傳動 副 ⑶ 確定傳動軸軸數(shù) 傳動軸軸數(shù) = 變速組數(shù) + 定比傳動副數(shù) + 1 = 3 + 1 + 1 = 5。從而確定結(jié)構(gòu)網(wǎng)如下 : 茂名職業(yè)技術(shù)學(xué)院 5 檢查傳動組的變速范圍時,只檢查最后一個擴(kuò)大組: R2 ? ? X2 ?P2 1??????????????其 中 ? ? , X2 ? 6 , P2 ? 2 所以 R2 ? 6 1 ? ? 8 ~ 10 ,合適。 在 主 傳 動 鏈 任 一 傳 動 組 的 最 大 變 速 范 圍 Rmax=( i min/imax) ≦ 8~10。在降速傳動中,防止齒輪直徑過大而使 徑向尺寸常限制最小傳動比 i min≥ 188。 關(guān)鍵詞 : CA6140機(jī)床 主軸箱 零件 傳動 茂名職業(yè)技術(shù)學(xué)院 2 CA6140 SPINDLE BOX OF MACHINE TOOL DESIGN Abstract As a major turning processing machine, CA6140 machine widely used in mechanical processing industry, the main design for the spindle box CA6140 machine design, main drive system is used to realize thetransmission system of the main machine, it should be a certain speed(speed) and certain speed range, in order to use the tools of differentmaterials, materials, processing of different size, differentrequirements of the workpiece, and can realize the movement easyoff, variable speed, reversing and braking. The main drive system of CNC machine tool mainly prises a motor, transmission system and the main ponents, the main transmission system with generalmachine tools pared in structure is relatively simple, because thetransmission unction of all or most of the stepless speed spindle motor to bear, left to a gear transmission mechanism is plex, to expand the range of stepless speed regulation motor there are only two or three stagegear transmission system. It is fixed at the left end of the machine body, a spindle is arranged on the spindlebox (spindleis hollow, the laying of machining and machine line bar can be used not only for the longer the can also increase the rigidity of spindle),chuck,workpiece clamping fixture. Spindle box function is to support and drive spindle, the spindle drives the workpiece isdetermined according to the rotation