【正文】 n modern mechanical manufacture, precision, small batch, changing parts of the processing problems, and stable product quality, dramatically increasing productivity. But look on the current business situation, due to more expensive CNC machine tool, onetime investment large enterprises the flesh is weak. As the machine power in China, has a large number of mon machine tools. Therefore, ordinary numerical control transformation of machine tool is a good choice. And choose the continuous transformation of control system of CNC lathe with positioning, linear interpolation, circular interpolation, pause, loop processing, thread processing and other functions. Taking into account the economical numerical control machine tool accuracy is not high, in order to simplify the structure, reducing costs, using openloop stepper motor control systems, machinefriendly and efficient, universal. Keywords: Mechanicalelectrical integration ； Openloop control length feed system design ； Ball screw nut pair； stepper motor 某某學院畢業(yè)設計（論文） 目 錄 第一章 緒論 ..................................................................................................................... 1 設計的目的 ........................................................................................................ 1 設計的內(nèi)容 ........................................................................................................ 1 微機數(shù)控系統(tǒng)總體設方案的擬定 ................................................................. 1 進給伺服系統(tǒng)機械部分設計計算 ................................................................ 2 微機控制系統(tǒng)的設計 .................................................................................. 2 數(shù)控加工程序的編制 .................................................................................. 2 設計任務 ............................................................................................................ 3 題目 .......................................................................................................... 3 .................................................................................................... 3 給定條件 ................................................................................................... 3 設計要求 ................................................................................................... 3 第二章 微型數(shù)控系統(tǒng)總體設計方案的擬定 ........................................................................ 4 總體方案的確定 .................................................................................................. 4 、系統(tǒng)的運動方式與伺服系統(tǒng)的選擇 ........................................................... 4 、計算機系統(tǒng) .............................................................................................. 4 、機床傳動方式 .......................................................................................... 4 第三章 機床進給伺服系統(tǒng)機械部分設計計算 .................................................................... 5 系統(tǒng)脈沖當量及切削力的確定 ............................................................................ 5 切削力的計算 ..................................................................................................... 5 滾珠絲杠螺母副的 設計、計算和選型 .................................................................. 5 第四章 進給伺服系統(tǒng)傳動計算 ..................................................................................... 10 齒輪傳動比計算 (縱向進給齒輪箱傳動比計算 ).................................................... 10 齒輪齒數(shù)及技 術參數(shù) ......................................................................................... 10 步進電機的計算和選用 ..................................................................................... 11 、初選步進電機 ........................................................................................ 11 、根據(jù)草圖校核步進電機轉矩 ................................................................. 12 等效轉動慣量計算 ............................................................................................ 14 某某學院畢業(yè)設計（論文） 電機力矩計算 ................................................................................................... 15 計算步進電動機空載起動頻率和切削時的工作頻率 ............................................ 17 第五章 微機數(shù)控系統(tǒng)硬件電路設計 .............................................................................. 19 單片機數(shù)控系統(tǒng)硬件電路設計內(nèi)容 ................................................................... 19 、繪制系統(tǒng)電器控制的結構框圖 ................................................................ 19 在微機應用系統(tǒng)中， CPU 的選擇應考慮以下因素 ...................................... 19 存儲器擴展電路設計 ................................................................................ 19 、 I/O 口接口電路設計 ............................................................................... 20 MCS— 51系列單片機的選用 ........................................................................... 20 存儲器擴展電路設計 ......................................................................................... 23 、程序存儲器的擴展 ................................................................................. 24 數(shù)據(jù)存儲器的擴展 ................................................................................... 27 譯碼電路設計 .......................................................................................... 27 I/O 接口電路及輔助電路設計 ........................................................................... 28 第六章 數(shù)控機床的加工程序編制 ................................................................................... 31 經(jīng)濟型數(shù)控車床數(shù)控系統(tǒng)的程序編制說明 .......................................................... 31 加工說明及工藝路線設計 .................................................................................. 31 零件加工工序 .....................................................................