【正文】 電動機的型號 31 選擇驅(qū)動電動機的型號 31 確定最大靜轉(zhuǎn)矩 32 驗算慣量匹配 32第5章 機械系統(tǒng)的動態(tài)分析 34 計算絲杠—工作臺縱向振動系統(tǒng)最低固有頻率 34 計算扭轉(zhuǎn)振動系統(tǒng)的最低固有頻率 34 計算機械傳動系統(tǒng)的反向死區(qū) 35 機械傳動系統(tǒng)由綜合拉壓剛度變化引起定位誤差 35 計算滾珠絲杠因扭轉(zhuǎn)變形產(chǎn)生的誤差 36 扭矩引起的滾珠絲杠螺母副的變形量的計算 36結(jié)論 37致謝 38參考文獻 39CONTENTSAbstract I Chapter 1 Introduction 1 Topics significance 1 CNC system development history 1 Domestic NC State Analysis 2 CNC system development trend 2 Ordinary machine tool CNC transformation of the need 3Chapter 2 The overall program design 4 Calculate parameters and technical requirements 4 Overall planning 4 Feed motor servo system reconstruction design 5 Couplings 5 The size parameter 6 The motion parameters 7 The dynamic parameters 8 Calculate the motor power 8 Calculate the speed 9Chapter 3 Calculate of the feed system 10 Traverse to the design of drive chain 10 The calculation of the main cutting force 10 Calculate the cutting force 10 The rail friction calculation 11 Calculate the coordinates of rail friction in cutting state 11 Axis without cutting state rail friction calculation 12 Alculate the ball screw pair of axial load force 12 The maximum axial load force calculation 12 The minimum axial load power calculation 13 Determine the feed drive chain gear ratio and transmission series 13 The ball screw estimates 14 Estimate the ball screw expected dynamic load rating 14 Estimate allows the ball screw axial deformation 16 The precision to determine the smallest thread of the ball screw allow bottom diamete 16 The preliminary to determine the accuracy class of the ball screw nut 17 Determine the specification model of the ball screw nut 18 The vertical feed system design and calculation 19 Dall screws for bearing capacity check 19 The ball screw nut critical pression load calibration 19 The critical speed of the ball screw nut checksum 20 Dall screw pair rated life Check 21 Calculate the mechanical transmission system of stiffness 22 Calculate the mechanical transmission system of stiffness 22 Calculate the stiffness of the ball screw nut supporting bearing 23 Calculate the contact stiffness of the ball and the raceway 24 Calculate the feed drive system integrated tension and pression stiffness 25 Calculate the torsional stiffness of the ball screw nut 25Chapter 4 drive motor selection and calculation 27 The calculation of muted to the motor shaft load moment of inertia 27 A single rotary part of the moment of inertia calculation 27 The moment of inertia of moving parts, converted to motor shaft 27 Increase the total load on the motor rotation inertia calculation 28 Calculate the load torque converted to motor shaft 28 Converted to a motor shaft of the cutting load torque calculation 28 Converted motor shaft friction load torque calculation 29 Generated by the ball screw preload and calculation of load torque converted to motor shaft 29 Converted to motor shaft load moment of calculation 30 Calculation of converted to electric on the shaft of the accelerating torque 30 Select the model of the drive motor 31 Select the model of the drive motor 31 Determine the maximum static torque 32 Checking the inertia match 32Chapter 5 Mechanical system dynamic analysis 34 Calculation of the lowest natural frequency of the screw Longitudinal vibration system 34 Calculation of the lowest natural frequency of torsional vibration system 34 Calculate the mechanical transmission of the reverse dead zone 35 The mechanical transmission system by the integrated pressive and tensile stiffness changes caused by positioning error 35 The calculation of ball screw error to reverse the deformation 36 The calculation of the amount of deformation of the Torque caused by the ball screw pair 36Conclusion 37Thanks 38References 3940 / 48第1章 緒論 選題的意義我國近幾年數(shù)控機床雖然發(fā)展較快，但與國際先進水平還存在一定的差距，主要表現(xiàn)在：可靠性差，外觀質(zhì)量差，產(chǎn)品開發(fā)周期長，應(yīng)變能力差[1]。通過確定基本系數(shù)、運動參數(shù)和動力參數(shù)，選擇了滾珠絲杠和聯(lián)軸器。改造后的機床成本低，提高了加工精度、具有可觀的經(jīng)濟效益。因此，現(xiàn)在國內(nèi)的主要先進的數(shù)控機床都是進口的，即使自己做的車床中的精密部件如精密絲杠都是靠進口的，價格昂貴，沒法靠自己的技術(shù)來制造。近半個世紀以來，數(shù)控系統(tǒng)經(jīng)歷了五代的發(fā)展。 第四代數(shù)控： 從1970年開始采用大規(guī)模集成電