某火工品橋帶點焊專用焊接定位工裝夾具的設計

 
摘    要

本文根據(jù)某航天火工品的電發(fā)火元件，在將“橋帶”焊接于4根“導柱”頂部時，由于4根“導柱”在封裝時難以確保其相互位置精度，存在較大的分散性，使其難以準確找到焊接位置,因此專門設計了一種具有記憶功能的焊接定位工裝夾具。該夾具通過在焊前分別調(diào)節(jié)好4根導柱的位置，使上電極分別對中4根導柱的中心并記憶住，焊接時則依次使4根導柱再現(xiàn)“記憶”位置，確保了焊接質(zhì)量。此外，對該夾具結構及原理進行了重點分析，繪制出該夾具系統(tǒng)的結構總裝圖和拆出零件圖，并對一些比較重要的局部機構進行了原理分析和動作的實現(xiàn)過程。

關鍵詞：火工品橋帶點焊，焊接夾具，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   錄

中文摘要 Ⅰ
ABSTRACT Ⅱ
1緒論 1
  1.1 焊接夾具應用的背景 1
    1.1.1焊接夾具的定義 1
1.1.2焊接夾具的種類 1
1.1.3焊接夾具設計的基礎理論 1
1.1.4焊接夾具設計的方法與步驟 2
1.1.5焊接工裝夾具的作用 3
  1.2 焊接工裝夾具在火工品應用中的發(fā)展與現(xiàn)狀 3
  1.3某航天火工品結構分析及其定位方案確認 4
    1.3.1結構分析  4
1.3.2設計方案比較 4
1.3.3方案的選定 5
 2 某火工品橋帶點焊專用焊接定位工裝夾具結構及其原理 7
 2.1 橋帶點焊機組成原理 7
 2.2 所焊焊件俯視圖 7
 3  主要單元結構原理及設計 12
  3.1 凸輪圖 12
 3.2 彈簧滾球式分度盤 14
 3.3 導向滑道 16
 3.4 螺旋夾緊機構 17
 3.5 彈簧夾緊機構 18
 3.6 中心軸結構分析及其軸承選擇 18
    3.6.1 軸強度分析 19
    3.6.2 套筒 19
     3.6.3滾動軸承的選擇 19
結論 20
致謝 21
參考文獻 22
附錄A 23