CA6140型車床進給箱設(shè)計

摘要

CA6140型臥式車床是普通精度級的萬能機床，它的特有功能是車削一定范圍內(nèi)的各種螺紋，包括切削公制螺紋、英制螺紋、模數(shù)螺紋和徑節(jié)螺紋的功能，要求進給傳動鏈的變速機構(gòu)能嚴格準確地按照標準螺距數(shù)列來變化。CA6140型臥式車床進給箱固定在床身左前面，內(nèi)有進給運動的變換裝置及操縱機構(gòu)，其功能是改變被加工螺紋的螺距或機動進給的進給量。變換裝置包括移換機構(gòu)，用來實現(xiàn)倒數(shù)關(guān)系及特殊因子；基本螺距機構(gòu)，用來實現(xiàn)車削出導程值按等差數(shù)列排列的螺紋；倍增機構(gòu)，用來實現(xiàn)車削螺紋的導程值成倍數(shù)關(guān)系變化的螺紋。
當U倍 ¬=1時發(fā)現(xiàn)一條新的傳動鏈，可以提高部分公制及模數(shù)螺紋的切削精度，并使傳動路線大大縮短。

關(guān)鍵詞：進給箱；變換裝置；移換機構(gòu)；基本螺距機構(gòu)；倍增機構(gòu)

Abstract

CA6140 horizontal lathe is a universal machine of general precision. The unique function of a normal lathe is to turn, to a certain extent, all kinds of threads, including metric, British, modular and diametrical pitch threads. It requires the speed changing mechanism of the feeding transmission chain can change in accordance with the standard screw-pitch sequence strictly and accurately. The feed box of CA6140 horizontal lathe is fixed on the left front of the lathe, with a feeding speed change mechanism, the feed box can change the amount of feed and threading programs. The transform device includes shift institution, the basic pitch agency and the times agency. The shift institution is used for realizing reciprocal relations and special factors. The basic pitch agency is used for turning threads whose lead value is arranged in arithmetic progression. The times agency is made for changing in double of turning threads’ lead value.
When the times mechanism is 1, there is a new transmission chain. It can increase the precision of some threads, and make the transmission chain much shorter.

Key Words: feed box, shift institution, transfer mechanism, the basic pitch agency, double agency

目錄

第一章 緒論-----------------------------------------------------------------1
第二章 CA6140進給箱傳動方案設(shè)計----------------------------------4
2.1  CA6140普通車床簡介-------------------------------------------------------------------------4
2.2  進給箱的傳動機構(gòu)-----------------------------------------------------------------------------5
2.3  進給箱切螺紋機構(gòu)設(shè)計----------------------------------------------------------------------8
2.4  切螺紋系統(tǒng)及齒數(shù)比的確定---------------------------------------------------------------9
2.5  增倍機構(gòu)設(shè)計以及移換機構(gòu)設(shè)計--------------------------------------------------------10
2.6  車制螺紋的工作過程-------------------------------------------------------------------------12
第三章 主要零件設(shè)計-----------------------------------------------------21
 3.1  齒式離合器的設(shè)計-----------------------------------------------------------------------------21
3.2  各軸及軸上組件的設(shè)計驗算---------------------------------------------------------------21
3.2.1  中心距a的確定----------------------------------------------------------------------------22
3.2.2  XII軸上齒輪的設(shè)計驗算-----------------------------------------------------------------22
3.2.3  XIV軸上齒輪的驗算----------------------------------------------------------------------25
3.2.4  XIV軸的設(shè)計驗算-------------------------------------------------------------------------30
3.2.5  XV軸上齒輪的設(shè)計驗算-----------------------------------------------------------------35
3.2.6  XV軸的設(shè)計驗算--------------------------------------------------------------------------38
3.2.7  XVI軸齒輪的設(shè)計驗算-------------------------------------------------------------------40
第四章 雙聯(lián)滑移齒輪進給箱傳動系統(tǒng)的研究-----------------------44
4.1  新傳動鏈車公制螺紋-------------------------------------------------------------------------44
4.2  新傳動鏈車模數(shù)螺紋-------------------------------------------------------------------------45
4.3  新傳動鏈的特點及適用范圍---------------------------------------------------------------46
結(jié)論---------------------------------------------------------------------------48
致謝---------------------------------------------------------------------------49
參考文獻---------------------------------------------------------------------50