CA6140型車床進(jìn)給箱設(shè)計(jì)

摘要

CA6140型臥式車床是普通精度級(jí)的萬能機(jī)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(jìn)給傳動(dòng)鏈的變速機(jī)構(gòu)能嚴(yán)格準(zhǔn)確地按照標(biāo)準(zhǔn)螺距數(shù)列來變化。CA6140型臥式車床進(jìn)給箱固定在床身左前面，內(nèi)有進(jìn)給運(yùn)動(dòng)的變換裝置及操縱機(jī)構(gòu)，其功能是改變被加工螺紋的螺距或機(jī)動(dòng)進(jìn)給的進(jìn)給量。變換裝置包括移換機(jī)構(gòu)，用來實(shí)現(xiàn)倒數(shù)關(guān)系及特殊因子；基本螺距機(jī)構(gòu)，用來實(shí)現(xiàn)車削出導(dǎo)程值按等差數(shù)列排列的螺紋；倍增機(jī)構(gòu)，用來實(shí)現(xiàn)車削螺紋的導(dǎo)程值成倍數(shù)關(guān)系變化的螺紋。
當(dāng)U倍 ¬=1時(shí)發(fā)現(xiàn)一條新的傳動(dòng)鏈，可以提高部分公制及模數(shù)螺紋的切削精度，并使傳動(dòng)路線大大縮短。

關(guān)鍵詞：進(jìn)給箱；變換裝置；移換機(jī)構(gòu)；基本螺距機(jī)構(gòu)；倍增機(jī)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(jìn)給箱傳動(dòng)方案設(shè)計(jì)----------------------------------4
2.1  CA6140普通車床簡(jiǎn)介-------------------------------------------------------------------------4
2.2  進(jìn)給箱的傳動(dòng)機(jī)構(gòu)-----------------------------------------------------------------------------5
2.3  進(jìn)給箱切螺紋機(jī)構(gòu)設(shè)計(jì)----------------------------------------------------------------------8
2.4  切螺紋系統(tǒng)及齒數(shù)比的確定---------------------------------------------------------------9
2.5  增倍機(jī)構(gòu)設(shè)計(jì)以及移換機(jī)構(gòu)設(shè)計(jì)--------------------------------------------------------10
2.6  車制螺紋的工作過程-------------------------------------------------------------------------12
第三章 主要零件設(shè)計(jì)-----------------------------------------------------21
 3.1  齒式離合器的設(shè)計(jì)-----------------------------------------------------------------------------21
3.2  各軸及軸上組件的設(shè)計(jì)驗(yàn)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(jì)驗(yàn)算-----------------------------------------------------------------22
3.2.3  XIV軸上齒輪的驗(yàn)算----------------------------------------------------------------------25
3.2.4  XIV軸的設(shè)計(jì)驗(yàn)算-------------------------------------------------------------------------30
3.2.5  XV軸上齒輪的設(shè)計(jì)驗(yàn)算-----------------------------------------------------------------35
3.2.6  XV軸的設(shè)計(jì)驗(yàn)算--------------------------------------------------------------------------38
3.2.7  XVI軸齒輪的設(shè)計(jì)驗(yàn)算-------------------------------------------------------------------40
第四章 雙聯(lián)滑移齒輪進(jìn)給箱傳動(dòng)系統(tǒng)的研究-----------------------44
4.1  新傳動(dòng)鏈車公制螺紋-------------------------------------------------------------------------44
4.2  新傳動(dòng)鏈車模數(shù)螺紋-------------------------------------------------------------------------45
4.3  新傳動(dòng)鏈的特點(diǎn)及適用范圍---------------------------------------------------------------46
結(jié)論---------------------------------------------------------------------------48
致謝---------------------------------------------------------------------------49
參考文獻(xiàn)---------------------------------------------------------------------50