【正文】 本科畢業(yè)設(shè)計說明書（論文）題 目：MJ50數(shù)控車床X軸進給系統(tǒng)結(jié)構(gòu)設(shè)計專 業(yè)： 機械設(shè)計制造及其自動化 畢業(yè)設(shè)計說明書（論文）中文摘要摘要： 本課題對MJ50型數(shù)控車床X軸進給系統(tǒng)結(jié)構(gòu)進行了設(shè)計，數(shù)控車床的進給系統(tǒng)負責(zé)接收數(shù)控系統(tǒng)發(fā)出的脈沖指令，經(jīng)放大和轉(zhuǎn)換后驅(qū)動機床，執(zhí)行預(yù)期的運動。它的靈敏度和傳動精度高，響應(yīng)速度快且工作穩(wěn)定，構(gòu)件剛度高及使用壽命長，故進給系統(tǒng)結(jié)構(gòu)有較高的研究意義。MJ50是一種經(jīng)濟性數(shù)控車床，其X軸的主要結(jié)構(gòu)零件包括伺服電機、滾珠絲杠、同步帶、滾珠絲杠支承軸承、滾動導(dǎo)軌和限位擋塊。采用交流伺服電機，能在整個速度區(qū)內(nèi)可實現(xiàn)平滑控制，幾乎無振蕩；采用低摩擦傳動副，如滾動導(dǎo)軌和滾珠絲杠副，傳動效率高，定位精度和重復(fù)定位精度高且傳動有可逆性；采用同步帶聯(lián)接絲杠和電機，結(jié)構(gòu)簡單、傳動平穩(wěn)，能緩沖吸振，可以在大的軸間距和多軸間傳遞動力，結(jié)構(gòu)緊湊，傳動效率高。 關(guān)鍵詞：進給系統(tǒng) 滾珠絲杠 導(dǎo)軌 南京工程學(xué)院工業(yè)中心畢業(yè)設(shè)計說明書畢業(yè)設(shè)計說明書（論文）英文摘要Title Economical CNC latheAbstractThe subject of MJ50 numerical control lathe X axis feed system structure design, CNC lathe feed system is responsible for receiving CNC system a pulse instruction, after amplification and conversion drive machine, movement is expected to perform. Its sensitivity and transmission accuracy are high, the speed of response and the stability of the work, the stiffness of the ponent and the long service life, so the structure of the feed system has a higher research significance. MJ50 is a kind of economical numerical control lathe, its main structure parts of X axis include servo motor, ball screw, synchronous belt, ball screw bearing, rolling guide and limit stop block.. By AC servo motor, can realize the smooth control in the whole speed region, almost no oscillation。 the low friction transmission pair, such as rolling guideway and ball screw pair, with high transmission efficiency, positioning accuracy and repeatability of positioning accuracy and high transmission is reversible。 lowfriction transmission pair, such as rolling guide and ball screw, high transmission efficiency, high positioning accuracy and repeatability of positioning accuracy and reversible drive sex。 with belt coupling screw and motor, simple structure, smooth transmission, can buffer the vibration absorption can transfer power between the major axis and multiaxis spacing, pact structure, high transmission efficiency. by synchronous belt connected with the screw rod and the motor, has the advantages of simple structure, stable transmission, buffering, vibration absorption, can be in large shaft distance and multiple shaft to transmit power, pact structure, transmission efficiency is high.Keywords axis feed drive system。ball screw。 the guide way目 錄前 言 1第一章 緒 論 2 引言 2 選題背景與意義 3 研究現(xiàn)狀 3 3 4 第二章 總體方案設(shè)計… ………………………………………………………………… 5 傳動類型的選擇……………………………………………………………………5 伺服電機的選擇……………………………………………………………………6 電動機與絲杠連接方式的選擇……………………………………………………6 同步帶的選擇………………………………………………………………………7 支撐方式及支撐軸承的選擇………………………………………………………7 絲杠有以下四種支撐方式……………………………………………………7 支承軸承的選擇………………………………………………………………8 第三章 X 向進給系統(tǒng)結(jié)構(gòu)設(shè)計……………………………………………………………9 已知技術(shù)參數(shù)………………………………………………………………………9 滾珠絲杠的設(shè)計計算及其選型……………………………………………………9 主切削力的確定………………………………………………………………9 滾珠絲杠導(dǎo)程的確定………………………………………………………10 確定絲杠的等效轉(zhuǎn)速………………………………………………10 估算工作臺質(zhì)量以及工作臺的承重………………………………10 確定絲杠的等效負載………………………………………………10 確定最大動載荷……………………………………………………11 絲杠軸向壓力選取絲杠底徑………………………………………12 最大轉(zhuǎn)速限制………………………………………………………12 選擇絲杠直徑………………………………………………………12 選擇滾珠絲杠型號…………………………………………………12 伺服電機的計算…………………………………………………………………13 電動機轉(zhuǎn)速的確定…………………………………………………………13 理論動態(tài)預(yù)緊轉(zhuǎn)矩…………………………………………………………13 最大動態(tài)摩擦力矩…………………………………………………………13 驅(qū)動最大負載所耗轉(zhuǎn)矩……………………………………………………13 支承軸承所需啟動扭矩……………………………………………………13 驅(qū)動滾珠絲杠副所需扭矩…………………………………………………13 電機的額定轉(zhuǎn)矩……………………………………………………………14 同步帶的設(shè)計與計算……………………………………………………………14 確定計算功率………………………………………………………………14 確定帶型，節(jié)距……………………………………………………………14 小帶輪齒數(shù)…………………………………………………………………15 帶輪直徑d1，d2的確定………………………………………………………15 驗算帶速v …………………………………………………………………15 確定中心距a及帶長Lp……………………………………………………15 計算小帶輪的嚙合齒數(shù)Zm ………………………………………………16 …………………………………………………………16 確定帶寬……………………………………………………………………17 計算作用在軸上的載荷……………………………………………………17 帶的工作驗算………………………………………………………………17 . 軸承及軸承座選型………………………………………………………………17 . 校核………………………………………………………………………………18 臨界壓縮負荷………………………………………………………………19 臨界轉(zhuǎn)速……………………………………………………………………19 絲杠拉壓振動與扭轉(zhuǎn)振動的固有頻率……………………………………20 絲杠扭轉(zhuǎn)剛度………………………………………………………………21 傳動精度計算………………………………………………………………21