某火工品桥带点焊专用焊接定位工装夹具的设计.doc

某火工品桥带点焊专用焊接定位工装夹具的设计

 
摘    要

本文根据某航天火工品的电发火元件，在将“桥带”焊接于4根“导柱”顶部时，由于4根“导柱”在封装时难以确保其相互位置精度，存在较大的分散性，使其难以准确找到焊接位置,因此专门设计了一种具有记忆功能的焊接定位工装夹具。该夹具通过在焊前分别调节好4根导柱的位置，使上电极分别对中4根导柱的中心并记忆住，焊接时则依次使4根导柱再现“记忆”位置，确保了焊接质量。此外，对该夹具结构及原理进行了重点分析，绘制出该夹具系统的结构总装图和拆出零件图，并对一些比较重要的局部机构进行了原理分析和动作的实现过程。

关键词：火工品桥带点焊，焊接夹具，定位

ABSTRACT

According to electric igniter in aerospace initiating explosive device, when ‘bridge bands’ are welding with the top of four ‘guide pillar’, it is difficult to find the welding position when the four ‘guide pillar’ are packaging because it is hard to ensure the accuracy or their mutual location and exist much more dispersion, so it specially design a fixture with the function of memory. The fixture adjustment the position of four ‘guide pillar’, then the upper electrodes are aligned to four ‘guide pillar’ and memory the position before welding, then it reappearance when welding. These steps ensure the quality of welding. Another, it mainly analyze the structure and principle of fixture, protract the assembly drawing and part drawing, some of the more important part structures were analyzed how to achieve the process.

Key words：initiating explosive devices bridge-belt spot welding, welding fixture, positioning 
 

目   录

中文摘要 Ⅰ
ABSTRACT Ⅱ
1绪论 1
  1.1 焊接夹具应用的背景 1
    1.1.1焊接夹具的定义 1
1.1.2焊接夹具的种类 1
1.1.3焊接夹具设计的基础理论 1
1.1.4焊接夹具设计的方法与步骤 2
1.1.5焊接工装夹具的作用 3
  1.2 焊接工装夹具在火工品应用中的发展与现状 3
  1.3某航天火工品结构分析及其定位方案确认 4
    1.3.1结构分析  4
1.3.2设计方案比较 4
1.3.3方案的选定 5
 2 某火工品桥带点焊专用焊接定位工装夹具结构及其原理 7
 2.1 桥带点焊机组成原理 7
 2.2 所焊焊件俯视图 7
 3  主要单元结构原理及设计 12
  3.1 凸轮图 12
 3.2 弹簧滚球式分度盘 14
 3.3 导向滑道 16
 3.4 螺旋夹紧机构 17
 3.5 弹簧夹紧机构 18
 3.6 中心轴结构分析及其轴承选择 18
    3.6.1 轴强度分析 19
    3.6.2 套筒 19
     3.6.3滚动轴承的选择 19
结论 20
致谢 21
参考文献 22
附录A 23