Abstract

The high efficiency, the precision work are one of numerical control engine bed processing most main characteristics. Using the numerical control engine bed processing, its product processing quality uniformity is good, the processing precision and the efficiency outdo compared to the ordinary engine bed very much, especially when outline not rule, complex curve or curved surface, multi-craft recombine processing and high accuracy request product processing, its merit is the traditional engine bed is unable to compare. This topic to the opposite sex body, the complex curve, the multi-craft recombine processing carries on the exploration, designs three practical and feasible technical processes and the craft equipment. In the product processing process, the work piece appears in jig localization and the clamp specially importantly. Must act according to six localizations to carry on the reasonable localization to the product, owes the localization, locates completely crosses the localization all to have to act according to the actual production process decision. The jig covered from has processed clamps the equipment to the assembly nearly all operating process one kind of attire. Because the massive processing operation needs to install clamps, the jig design changes can it be that the constant weight in the manufacture system to want, it affects the processing quality directly, the productivity and the production cost. This article through the analysis support components, the air compressor snifting valve lid as well as the supporting the unique feature and the processing request which wraps, has formulated a set of reasonable jig design, thus for guaranteed this components the processing precision will provide one economical practical craft equipment, will have certain practical value. Through to each kind of localization clamp analysis comparison, chose and combines a set both to be able to satisfy the processing request, and the quite succinct installment, and carried on the numerical control programming to each step working procedure.
Keywords:  numerical control processing  technical process  craft equipment   jig design

目  录

摘  要 II
Abstract III
目  录 IV
第1章 绪论 1
1.1 机械加工工艺概述 1
1.2机械加工工艺流程 1
1.3夹具概述 2
1.4机床夹具的功能 2
1.5机床夹具的发展趋势 2
1.5.1机床夹具的现状 3
1.5.2现代机床夹具的发展方向 3
第2章 数控加工工艺分析 5
2.1零件介绍 5
2.2数控加工工艺的合理性分析 6
2.3 数控加工工艺的特点 6
2.3.1 数控加工的一般特点 6
2.3.2数控加工工艺的特殊要求 7
2.4零件的工艺性分析 7
2.5 毛坯的选择 7
2.6 数控加工工艺分析及工序设计 8
2.5数控加工工艺过程的拟定 10
2.5.1根据前述的工艺措施,制定支座加工主要工艺过程 10
2.5.2工步顺序安排的一般原则 11
2.6进给路线的确定 11
2.6.1确定进给路线的主要原则 11
2.7 工件的装夹 11
2.7.1 定位基准选择的一般原则 11
2.7.2 工件定位方案 12
2.8切削用量的确定 12
2.8.1背吃刀量和侧吃的确定 12
2.8.2主轴转速的确定 12
2.8.3进给速度的确定 12
2.9加工刀具的选择 13
2.9.1选择数控刀具通常应考虑的因素 13
2.9.2面铣刀主要参数的选择 13
2.9.3钻孔刀具及其选择 13
2.9.4镗孔刀具及其选择 14
第3章 夹具设计 15
3.1问题的提出 15
3.2 定位方案及定位元件的选择 15
3.3切削力及夹紧力的计算 16
3.4 误差分析与计算 17
3.5 零、部件的设计与选用 18
3.6 夹具设计及操作的简要说明 19
3.7 本章小结 19
第4章  数控加工编程 20
总 结 35
致 谢 36
参考文献 37

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