火工品橋帶點(diǎn)焊專用加壓機(jī)構(gòu)的設(shè)計(jì)

摘    要

電阻焊的焊點(diǎn)形成的影響因素有如下三個(gè)參數(shù)：熱量，時(shí)間和壓力。在電阻點(diǎn)焊過程中如果焊接壓力控制的比較合適，將得到比母材本身強(qiáng)度更高的焊接接頭。此外，正確地施加焊接壓力還可以消除焊接時(shí)的飛濺，并減少電扳的磨損和鐓粗，甚至對(duì)鍍鋅鋼板的焊接，也不會(huì)產(chǎn)生在多數(shù)不正常的電阻焊系統(tǒng)中常見的火花四濺的現(xiàn)象，可獲得表面光潔、強(qiáng)度很高的焊點(diǎn)。這一切都說明焊接壓力是焊接過程中的一個(gè)很重要的參數(shù)。因此，點(diǎn)焊機(jī)加壓機(jī)構(gòu)的重要性就不言而喻了。
本文首先介紹了國內(nèi)外電阻點(diǎn)焊及其加壓機(jī)構(gòu)的研究現(xiàn)狀，闡明了本課題研究的目的、意義。針對(duì)橋帶點(diǎn)焊的特殊情況，以及現(xiàn)有腳踏式彈簧杠桿加壓機(jī)構(gòu)上電極行程過短，僅20mm，不能適應(yīng)20mm以上深孔結(jié)構(gòu)火工品的焊接；上電極導(dǎo)向精度過低，難以保證上電極精確對(duì)中導(dǎo)柱頂部中心位置的要求的問題，擬設(shè)計(jì)一種手動(dòng)凸輪杠桿式加壓機(jī)構(gòu)，來解決以上問題。該機(jī)構(gòu)通過操作手動(dòng)凸輪和砝碼來實(shí)現(xiàn)電極壓力的大小調(diào)節(jié)及維持，可以保證上電極有足夠的行程及導(dǎo)向精度。然后本文重點(diǎn)分析了手動(dòng)凸輪杠桿式加壓機(jī)構(gòu)的具體工作原理，以及各個(gè)性能的實(shí)現(xiàn)方法。

關(guān)鍵詞： 電阻點(diǎn)焊，加壓機(jī)構(gòu)，凸輪杠桿式
 

ABSTRACT

There are three factors: heat、time、pressure, which seriously influence the quality of welding spot in resistance welding. If the pressure can be suitably controlled in the welding process, the joint which is much stronger than primary material can be gained. In addition, when jointing, if the pressure is suitably controlled, it can reduce the splash in welding process, can reduce the abrasion of the electrode. Even when we joint the plating armor plate, there will not be much splash,  and the welding spot will be very slick and strong. All of this just wants to tell us that that welding pressure is very important in joint process. Therefore, the importance of the pressure machine does not need to say much.
The thesis first introduces actuality of resistance spot welding in-country and abroad, clarifies the aim and significance of this thesis. Be dead against the particularity of spot welding, along with some problem of spring lever pressure machine, for example: the track of the top electrode is too short, only 20mm;it can not be used when the hole is longer than 20mm. Also, the top electrode directional precision is too low, it can not make sure that the up electrode contacts exactly and correctly to the centre of the column top surface. That needs to design a new pressure machine to solve these problems. This is the manual cam lever style pressure machine. The machine use cam and poise to adjust and keep the welding pressure. The top electrode has a track which is long enough and it’s directional precision is also high. Then, this paper explains the work theory of the machine and how to achieve some function of the pressure machine.

Keywords: resistance spot welding, pressure machine, cam lever style
 

目     錄
摘    要 I
ABSTRACT II
1緒論 1
1.1電阻點(diǎn)焊技術(shù)介紹 1
1.1.1概述 1
1.1.2點(diǎn)焊的原則 2
1.1.3點(diǎn)焊循環(huán) 2
1.1.4點(diǎn)焊焊接參數(shù)及相互關(guān)系 3
1.2關(guān)于點(diǎn)焊加壓機(jī)構(gòu)的研究現(xiàn)狀 5
1.3橋帶點(diǎn)焊專用加壓機(jī)構(gòu) 5
2手動(dòng)凸輪杠桿式加壓機(jī)構(gòu)的結(jié)構(gòu)原理 7
3各結(jié)構(gòu)單元的分析與設(shè)計(jì) 9
3.1加壓杠桿 9
3.2電極壓力與砝碼重量的確定 11
3.2.1當(dāng)電極壓力為0Kg時(shí)： 12
3.2.2當(dāng)電極壓力為0.5Kg時(shí)： 14
3.2.3當(dāng)電極壓力為1Kg時(shí)： 15
3.2.4當(dāng)電極壓力為1.5Kg時(shí)： 15
3.2.5電極壓力與砝碼到轉(zhuǎn)軸01的距離的關(guān)系表 16
3.3凸輪和限位撐桿的分析與設(shè)計(jì) 16
3.3.1凸輪的分析與設(shè)計(jì) 16
3.3.2限位桿和限位撐桿的分析 21
3.4軸的分析與設(shè)計(jì) 22
3.4.1軸1的分析與設(shè)計(jì) 22
3.4.2軸2的分析與設(shè)計(jì) 23
3.4.3軸3的分析與設(shè)計(jì) 23
3.4.4座軸的分析與設(shè)計(jì) 23
總   結(jié) 24
致    謝 25
參 考 文 獻(xiàn) 26