火工品電容儲能多脈沖點焊電源的設計

摘    要

 本文分析了小型及微型零件特別是某航天火工品電阻點焊的工藝特點及其對焊接設備的要求，討論了某航天火工品的焊接現(xiàn)狀，提出了當前某航天火工品電阻點焊的主要問題是焊接飛濺和焊點強度之間的矛盾。針對導柱和橋帶材料的熔點、導熱系數(shù)、電阻率等物理性能相差較大的焊件，設計一種專用電容儲能多脈沖逆變式點焊電源，提供高頻率多脈沖焊接電流用于航天火工品的焊接，以減弱或根本解決焊點強度和焊接飛濺這對矛盾。為解決某航天火工品點焊飛濺大這一問題提供了一個新思路，具有一定的理論價值和實用意義。
本文提出了將儲能點焊和逆變技術相結合的設計思想，設計出了“電容儲能多脈沖點焊電源”給出了主要的結構原理和主要的電路設計計算，為確保焊接質量和整機運行可靠性，本畢業(yè)設計擬采用穩(wěn)壓電源為儲能電容充電，確保每一焊點獲得相同的儲能電容，逆變主回路擬采用雙單端正激結構，以適應橋帶點焊工作時間短的特點，防止逆變主回路顛覆，保證其工作可靠性，而且為了防止焊接過程中儲能電容充電的過載，將設計逆變主回路和充電回路的協(xié)調控電路，并完成設計計算，達到畢業(yè)設計的要求。
 

關鍵詞：，電阻點焊，逆變技術，電容儲能，PWM控制，參數(shù)設計

ABSTRACT

This paper analyses the small and minitype components of a particular space for the fire resistance spot welding process characteristics and the requirements of welding equipment, discussed the space of a fire-product of welding the status quo, to a certain space of the current fire resistance spot welding of the goods The main problem is welding spatter and the conflict between the solder joint strength. column for the bridge with materials and the melting point, thermal conductivity and resistivity, and other physical properties of the large difference welding pieces, the design of a dedicated multi-capacitor discharge pulse power inverter spot welding, high frequency welding current for Multi-Pulse Space fire workers for the welding, to weaken or simply solder joint strength and resolve this contradiction welding spatter. To address the fire of a space for spot welding spatter big this issue provide a new idea, has a theoretical value and practical significance.
    In this paper, energy storage will be spot-welding technology and inverter combination of design ideas, to design a "multi-pulse energy storage capacitors spot welding power" is the main principle and structure of the main circuit design, to ensure the quality of welding and operation reliability, graduated from the power supply design to be adopted for energy storage capacitors charge to ensure that each spot given the same energy storage capacitors, inverter main circuit to be a dual single-ended forward structure to adapt to the bridge with spot welding The characteristics of short working hours to prevent the inverter main circuit subversion, and ensure the reliability of its work, and in order to prevent the welding process in the energy storage capacitors charge of the overload, will design the main circuit inverter circuits charge of the coordination and control circuits, and complete the design and calculation , to design the graduation requirements.

Key words：cap energy storage ,resistance spot welding, inversion technology ，PWM control, parameter design

目   錄

摘    要 I
ABSTRACT II
1 緒論 1
1.1前言 1
1.2電阻點焊電源的特點及發(fā)展概況 1
1.3本文研究的內容和意義 3
2. 多脈沖電容儲能逆變式電阻點焊電源結構原理 5
3主要模塊功能分析 8
3.1逆變主回路 8
3.2儲能電容穩(wěn)壓及其充電主回路 10
3.3時序控制電路 12
3.4逆變控制電路 16
4 設計計算 20
4.1儲能電容充電回路 20
4.1.1儲能充電電容計算 20
4.1.2限流電阻計算 21
4.1.3 整流橋計算選擇 22
4.2時序控制電路的計算 22
4.2.1各定時器的計算 22
4.3逆變控制電路的計算 22
5結論 24
致謝 25
參考文獻 26
附錄A：多脈沖逆變式電容儲能點焊電源A3圖 27