CA6140车床进给箱的设计.doc

CA6140型车床进给箱设计 The Feed Box Design Of CA6140 Horizontal Lathe 摘要 CA6140型卧式车床是普通精度级的万能机床，它的特有功能是车削一定范围内的各种螺纹，包括切削公制螺纹、英制螺纹、模数螺纹和径节螺纹的功能，要求进给传动链的变速机构能严格准确地按照标准螺距数列来变化。CA6140型卧式车床进给箱固定在床身左前面，内有进给运动的变换装置及操纵机构，其功能是改变被加工螺纹的螺距或机动进给的进给量。变换装置包括移换机构，用来实现倒数关系及特殊因子；基本螺距机构，用来实现车削出导程值按等差数列排列的螺纹；倍增机构，用来实现车削螺纹的导程值成倍数关系变化的螺纹。 当U倍 =1时发现一条新的传动链，可以提高部分公制及模数螺纹的切削精度，并使传动路线大大缩短。 关键词：进给箱；变换装置；移换机构；基本螺距机构；倍增机构 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 目录 第一章 绪论-----------------------------------------------------------------1 第二章 CA6140进给箱传动方案设计----------------------------------4 2.1 CA6140普通车床简介-------------------------------------------------------------------------4 2.2 进给箱的传动机构-----------------------------------------------------------------------------5 2.3 进给箱切螺纹机构设计--------------------------------------------------------