【正文】 ....................... 30 選擇驅(qū)動(dòng)電動(dòng)機(jī)的型號(hào) .................................................... 31 CM6132 型精密車(chē)床進(jìn)給系統(tǒng)的數(shù)控改造 V 選擇驅(qū)動(dòng)電動(dòng)機(jī)的型號(hào) ........................................... 31 確定最大靜轉(zhuǎn)矩 ...................................................... 32 驗(yàn)算慣量匹配 ......................................................... 32 第 5 章 機(jī)械系統(tǒng)的動(dòng)態(tài)分析 ........................................................ 34 計(jì)算絲杠 — 工作臺(tái)縱向振動(dòng)系統(tǒng)最低固有頻率 ............... 34 計(jì)算扭轉(zhuǎn)振動(dòng)系統(tǒng)的最低固有頻率 .................................. 34 計(jì)算機(jī)械傳動(dòng)系統(tǒng)的反向死區(qū) ......................................... 35 機(jī)械傳動(dòng)系統(tǒng)由綜合拉壓剛度變化引起定位誤差 ........... 35 計(jì)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(jì)算 ......... 36 結(jié)論 ................................................................................................. 37 致謝 ................................................................................................. 38 參考文獻(xiàn) ......................................................................................... 39 CM6132 型精密車(chē)床進(jìn)給系統(tǒng)的數(shù)控改造 VI CONTENTS Abstract .............................................................................................I Chapter 1 Introduction .................................................................. 1 Topics significance .............................................................. 1 CNC system development history ........................................ 1 Domestic NC State Analysis ................................................ 2 CNC system development trend ........................................... 2 O rdinary machine tool CNC transformation of the need ....... 3 Chapter 2 The overall program design .......................................... 4 C alculate parameters and technical requirements ................. 4 O verall planning .................................................................. 4 Feed motor servo system reconstruction design .......... 5 Couplings .................................................................. 5 The size parameter .............................................................. 7 The motion parameters ........................................................ 7 The dynamic parameters ...................................................... 8 Calculate the motor power ......................................... 8 Calculate the speed .................................................... 9 Chapter 3 Calculate of the feed syste m ....................................... 10 Traverse to the design of drive chain ................................. 10 The calculation of the main cutting force ................. 10 Calculate the cutting force ....................................... 10 The rail fr iction calculation ............................................... 11 C alculate 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 CM6132 型精密車(chē)床進(jìn)給系統(tǒng)的數(shù)控改造 VII Determine the feed drive chain gear ra tio 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 scre w allow bottom diamete ......................................... 17 The preliminary to determine the accuracy class of the ball screw nut ................................................................................... 18 Determine the specification model of the ball screw nut .... 19 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 C heck ..................................... 21 Calculate the mechanical transmission system of stiffness 22 Calculate the mechanical transmission system of stiffness .............................................................................. 22 C alculate the stiffness of the ball screw nut supportin g bearing ................................................................................ 23 .3 Calculate the contact stiffness of the ball and the raceway............................................................................... 24 C alculate the feed drive system inte grated tension and pression stiffness .......................................................... 25 Calculate the torsional stiffness of the ball screw nut ....... 26 Chapter 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 CM6132 型精密車(chē)床進(jìn)給系統(tǒng)的數(shù)控改造