火工品電容儲能點(diǎn)焊電源及其時序控制電路的設(shè)計

摘    要

本文分析了某航天火工品的焊接現(xiàn)狀，提出了當(dāng)前某航天火工品電阻點(diǎn)焊的主要問題是焊接強(qiáng)度和飛濺難以調(diào)合。為了解決該航天火工品的焊接問題，本文提出了采用電容儲能的專用點(diǎn)焊電源，有效的解決了航天火工品橋帶點(diǎn)焊焊接強(qiáng)度和飛濺之間的矛盾，達(dá)到了少飛濺和無飛濺的要求。為精密的薄小器件的焊接提供了一種有效的方法，為進(jìn)一步提高我國航天火工品焊接質(zhì)量作出了有力的嘗試，具有一定的理論意義和實(shí)用價值。
本文采取儲能電容作為焊接的直接電源，并根據(jù)導(dǎo)柱和橋帶材料的物理特性，設(shè)計出該儲能焊電源的電路圖，包括壓控充電回路，可控硅（SCR）控制的精密電容RLC放電回路、儲能電容放電電流的變換回路以及整機(jī)的時序控制電路。并根據(jù)電源的原理和工作要求，計算出了部分主要參數(shù)并選擇部件型號。

關(guān)鍵詞：儲能電容，點(diǎn)焊，時序控制，火工品

ABSTRACT

This paper analyses the welding status of a Pyrotechnics , and raises that the main problem of the Pyrotechnics resistance spot welding is the difficulty that how to reconcile the weld strength and splash blending. In order to solve the spacecraft Pyrotechnics workers for the welding problems, the paper proposed the dedicated spot welding power of energy storage.It effectively solves the contradictions between the spot welding spatter welding strength and the contradiction of space for the bridge with Pyrotechnics, and gets no flying and flying requirements. It provides an effective way for the precision of the welding thin and small device ,also make a strong attempt to further improve the space Pyrotechnics welding quality of the goods , moreover it has a theoretical and practical value.
   In this paper, energy storage capacitors is taken by the direct welding power, and according to the physical properties of materials between the bridge-zone and wire, designs out the circuit of storage welding power. it includes the charging voltage control loop, the circuit of the precision capacitance RLC capacitor controled by SCR  precision control, the transform circuit of the energy storage capacitors discharge current and the timing control circuit of all the machines. and in accordance with the principle of supply and work requirements, it’s easy to calculate the main parameters of the models and select the components.

Keywords：Energy storage capacitors,Spot welding, Timing control, Pyrotechnics
 

目 錄

摘    要 I
ABSTRACT II
1 緒論 1
1.1 點(diǎn)焊的基本原理及其應(yīng)用 1
1.2 典型電阻點(diǎn)焊機(jī)介紹 3
1.2.1 工頻電阻點(diǎn)焊機(jī) 3
1.2.2 電容儲能電阻點(diǎn)焊機(jī) 3
1.3 某航天火工品電阻點(diǎn)焊現(xiàn)狀和問題 5
2 總體設(shè)計方案 7
3 單元電路原理及其設(shè)計 10
3.1 RLC型電容儲能焊放電主回路 10
3.2 儲能電容充電電路原理 11
3.3 時序控制電路 13
3.3.1 結(jié)構(gòu)原理 13
3.3.2 555定時電路介紹 17
3.4 SCR驅(qū)動控制電路 20
3.5 555延時電路和壓電蜂鳴電路 22
4 設(shè)計計算 23
4.1 RLC型放電主回路參數(shù)設(shè)計 23
4.1.1 RLC型放電回路的等效電路 23
4.1.2 儲能焊機(jī)參數(shù)分析..........................................................................................................24
4.1.3放電回路的計算……………………………………………………………………...…25
4.2 儲能充電回路計算 27
4.2.1 控制管T4的選擇 27
4.2.2 電阻和穩(wěn)壓管的選擇 27
4.3 555時序控制回路的計算 29
5 結(jié)論 30
6 致謝 31
參考文獻(xiàn) 32
附錄A: 火工品電容儲能電阻點(diǎn)焊機(jī)整機(jī)原理圖...........................................................................33