工作台设计
摘 要：
本课题主要介绍了回转工作台的原理和机械结构的设计，这种回转工作台是一种可以实现圆周进给和分度运动的工作台，它主要由原动力、齿轮传动、蜗杆传动、工作台等部分组成，是一种很实用的加工工具。它常被使用于卧式的镗床和加工中心上，可提高加工效率，完成更多的工艺。
设计夹具一般先对原始资料进行分析，明确设计的要求和意图，然后提出具体的定位、夹紧、对刀方案和夹具体的一般结构。为保证设计的可靠性，还对夹具的夹紧力和精度进行了分析。
关键词：回转工作台；齿轮传动；蜗杆传动；夹具
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The Table Of Four Side Multiple Drill Designing
Abstract：
The principle and mechanical structural designing of the rotary table is introduced in this paper. This rotary table is a circle feed can move in rotary feed and graduate, which is made up of prime power, gear driving, worm gear driving and operating platform and other components, is a very useful tool for processing. It is used in the boring driller and horizontal machining centers, improve processing efficiency, the more complete the process, because of the higher efficiency and multifunction its always used in the driller and machining centers. Designs the tongs to carry on the analysis first generally to the firsthand information, is clear about the design the request and the intention, Then proposes the concrete localization, the clamp, to the knife plan and the fixture body's general structure. For guarantee design reliability, but also has carried on the analysis to fixture's clamping force and the precision.
Key words：Rotary table；Gear drive；Worm drive；Jig
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目录 目 录
绪 论 ............................................................................................................................................. - 1 - 第一章 回转工作台的原理与应用 ............................................................................................... - 1 -
1.1 回转工作台 ..................................................................................................................... - 1 - 1.2 设计准则 ......................................................................................................................... - 1 - 1.3 主要技术参数 ................................................................................................................. - 3 - 1.4 本章小结 ......................................................................................................................... - 3 - 第二章 回转工作台的结构设计 ................................................................................................. - 4 -
2.1 电机的选择 ..................................................................................................................... - 4 - 2.2 电机运动参数的计算 ..................................................................................................... - 4 - 2.3 传动方案的确定 ............................................................................................................. - 5 -
2.3.1 传动方案传动应满足的要求 ............................................................................. - 5 - 2.3.2 传动方案及其分析 ............................................................................................. - 5 - 2.4 齿轮传动的设计 ............................................................................................................. - 6 -
2.4.1 选择齿轮传动的类型 ......................................................................................... - 6 - 2.4.2 选择材料 ............................................................................................................. - 6 - 2.4.3 按齿面接触疲劳强度设计 ................................................................................. - 7 - 2.4.4 确定齿轮的主要参数与主要尺寸 ..................................................................... - 7 - 2.4.5 校核齿根弯曲疲劳强度 ..................................................................................... - 8 - 2.4.6 确定齿轮传动精度 ............................................................................................. - 8 - 2.4.7 齿轮结构设计 ..................................................................................................... - 8 - 2.5 蜗轮及蜗杆的选用与校核 ............................................................................................. - 8 -
2.5.1 选择蜗杆传动类型 ............................................................................................. - 9 - 2.5.2 选择材料 ............................................................................................................. - 9 - 2.5.3 按齿面接触疲劳强度设计 ................................................................................. - 9 - 2.6 蜗杆与蜗轮的主要参数与几何尺寸 ........................................................................... - 10 - 2.6 轴的校核与计算 ........................................................................................................... - 11 - 2.7 弯矩组合图 ................................................................................................................... - 12 - 2.8 根据最大危险截面处的扭矩确定最小轴径 ............................................................... - 12 - 2.9 齿轮上键的选取与校核 ............................................................................................... - 12 - 2.10 轴承的选用 ................................................................................................................. - 12 -
2.10.1 轴承的类型 ..................................................................................................... - 13 - 2.10.2 轴承的游隙及轴上零件的调配 ..................................................................... - 13 - 2.10.3 滚动轴承的配合 ............................................................................................. - 13 - 2.10.4 滚动轴承的润滑 ............................................................................................. - 13 - 2.10.5 滚动轴承的密封装置 ..................................................................................... - 14 - 2.11 本章小结 ..................................................................................................................... - 15 - 第三章 夹具设计 ....................................................................................................................... - 16 -
3.1 夹具的发展趋势 ........................................................................................................... - 16 - 3.2 工件定位的基本原理 ................................................................................................... - 17 - 3.3 应用定位原理几种情况 ............................................................................................... - 18 - 3.4 常用定位元件及选用 ................................................................................................... - 18 - 3.5 定位方案选择 ............................................................................................................... - 20 - 3.6 误差分析 ....................................................................................................................... - 20 -
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目录 3.7 夹紧方案 ....................................................................................................................... - 21 - 3.8 夹紧装置的设计原则 ................................................................................................... - 21 - 3.9 夹紧力三要素 ............................................................................................................... - 21 - 3.10减小夹紧变形的措施 .................................................................................................. - 23 - 第四章 总结 .................................................................................................. 错误！未定义书签。 致 谢 ......................................................................................................................................... - 25 - 参考文献 ....................................................................................................................................... - 26 -
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