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說說回流焊和波峰焊有什么區別

波峰焊與回流焊是兩種比較常見的焊接辦法,下面我們就來談一下波峰焊與回流焊的差異。 外表安裝技術,簡稱SMT,作為新一代電子裝聯技術現已滲透到各個領域,SMT產品具有結構緊湊、體積小、耐振動、抗沖擊,高頻特性好、出產功率高等長處。SMT在電路板裝聯工藝中已占有了領先地位。 

典型的(de)外表(biao)貼裝(zhuang)工藝(yi)分為三(san)步:施加(jia)焊(han)錫(xi)膏----貼裝(zhuang)元器件-----回(hui)流焊(han)接

第一步:施加焊錫膏 其意圖是將適量的焊膏均勻的施加在PCB的焊盤上,以確保貼片元器件與PCB相對應的焊盤在回流焊接時,到達良好的電器銜接,并具有滿足的機械強度。 焊膏是由合金粉末、糊狀焊劑和一些添加劑混合而成的具有必定黏性和良好觸便特性的膏狀體。常溫下,由于焊膏具有必定的黏性,可將電子元器件粘貼在PCB的焊盤上,在歪斜視點不是太大,也沒有外力磕碰的狀況下,一般元件是不會移動的,當焊膏加熱到必定溫度時,焊膏中的合金粉末熔融再活動,液體焊料滋潤元器件的焊端與PCB焊盤,冷卻后元器件的焊端與焊盤被焊料互聯在一起,構成電氣與機械相銜接的焊點。 焊膏是由專用設備施加在焊盤上,其設備有: 全自動印刷機(LF-2000)、半自動印刷機(LTCL-3088)、手動印刷臺、半自動焊膏分配器,錫膏攪拌機(LF-180A)輔佐設備等。 施加辦法 適用狀況 優 點 缺 點 機器印刷 :半自動(LTCL-3088錫膏印刷機)批量較大或精度高,靈活性高,供貨周期較緊,批量出產、出產功率 全自動:精度 0.2mm范圍內印刷,大批量,但出資本錢高! 手動印刷 小批量出產,精度不高產品研制 、本錢較低 定位簡略、無法進行大批量出產 ,只適用于焊盤距離在0.5mm以上元件印刷 手動滴涂 一般線路板的研制,修補焊盤焊膏 無須輔佐設備,即可研制出產 只適用于焊盤距離在0.6mm以上元件滴涂 


第二步:貼(tie)(tie)(tie)裝元器(qi)(qi)件(jian) 本工(gong)(gong)序(xu)是用(yong)(yong)貼(tie)(tie)(tie)裝機或手藝將(jiang)片式(shi)元器(qi)(qi)件(jian)準確的(de)貼(tie)(tie)(tie)裝到(dao)印好焊膏或貼(tie)(tie)(tie)片膠的(de)PCB外表相應(ying)的(de)位置。 貼(tie)(tie)(tie)裝辦法(fa)有二種(zhong),其(qi)對比如下: 施加(jia)辦法(fa) 適用(yong)(yong)狀(zhuang)況 優 點 缺 點 機器(qi)(qi)貼(tie)(tie)(tie)裝 批(pi)(pi)量(liang)較(jiao)大(da),供貨周(zhou)期緊 適合大(da)批(pi)(pi)量(liang)出(chu)(chu)產(chan)(chan),質量(liang)提高,但(dan)出(chu)(chu)資較(jiao)大(da) 手動(dong)貼(tie)(tie)(tie)裝 小批(pi)(pi)量(liang)出(chu)(chu)產(chan)(chan),簡略(lve)產(chan)(chan)品研(yan)制(zhi) 操作簡潔(jie),本錢較(jiao)低 出(chu)(chu)產(chan)(chan)功率須依操作的(de)人員的(de)熟練程度 人工(gong)(gong)手動(dong)貼(tie)(tie)(tie)裝首要(yao)工(gong)(gong)具(ju):真空(kong)吸筆、料架、鑷(nie)子、IC吸放(fang)對準器(qi)(qi)、低倍體視(shi)顯微(wei)鏡或放(fang)大(da)鏡等。 

第三(san)步:回流焊(han)(han)(han)(han)接(jie)(jie) 回流焊(han)(han)(han)(han)是英文(wen)ReflowSoldring的(de)直譯,是通(tong)過從頭熔化(hua)預先分配到(dao)印制(zhi)板焊(han)(han)(han)(han)盤(pan)(pan)上的(de)膏(gao)(gao)(gao)(gao)裝(zhuang)軟釬焊(han)(han)(han)(han)料(liao),完成(cheng)外表拼裝(zhuang)元(yuan)器(qi)(qi)件(jian)焊(han)(han)(han)(han)端(duan)或引腳(jiao)與印制(zhi)板焊(han)(han)(han)(han)盤(pan)(pan)之間機械與電氣(qi)(qi)銜接(jie)(jie)的(de)軟釬焊(han)(han)(han)(han)。 從SMT溫(wen)(wen)度(du)特性曲(qu)線(xian)(見(jian)圖(tu))分析回流焊(han)(han)(han)(han)的(de)原理。首先PCB進入(ru)(ru)140℃~160℃的(de)預熱(re)(re)溫(wen)(wen)區時,焊(han)(han)(han)(han)膏(gao)(gao)(gao)(gao)中的(de)溶劑、氣(qi)(qi)體蒸發(fa)掉(diao),一起,焊(han)(han)(han)(han)膏(gao)(gao)(gao)(gao)中的(de)助焊(han)(han)(han)(han)劑潮(chao)濕焊(han)(han)(han)(han)盤(pan)(pan)、元(yuan)器(qi)(qi)件(jian)焊(han)(han)(han)(han)端(duan)和(he)引腳(jiao),焊(han)(han)(han)(han)膏(gao)(gao)(gao)(gao)軟化(hua)、塌落(luo),覆(fu)蓋了焊(han)(han)(han)(han)盤(pan)(pan),將(jiang)焊(han)(han)(han)(han)盤(pan)(pan)、元(yuan)器(qi)(qi)件(jian)引腳(jiao)與氧氣(qi)(qi)隔離;并使(shi)(shi)表貼(tie)元(yuan)件(jian)得到(dao)充沛(pei)的(de)預熱(re)(re),接(jie)(jie)著進入(ru)(ru)焊(han)(han)(han)(han)接(jie)(jie)區時,溫(wen)(wen)度(du)以每(mei)秒(miao)2-3℃國(guo)際標準升(sheng)溫(wen)(wen)速率敏捷(jie)上升(sheng)使(shi)(shi)焊(han)(han)(han)(han)膏(gao)(gao)(gao)(gao)到(dao)達熔化(hua)狀況,液態焊(han)(han)(han)(han)錫在PCB的(de)焊(han)(han)(han)(han)盤(pan)(pan)、元(yuan)器(qi)(qi)件(jian)焊(han)(han)(han)(han)端(duan)和(he)引腳(jiao)潮(chao)濕、分散(san)、漫流和(he)回流混合(he)(he)在焊(han)(han)(han)(han)接(jie)(jie)界面上生成(cheng)金屬化(hua)合(he)(he)物,構成(cheng)焊(han)(han)(han)(han)錫接(jie)(jie)點;最終PCB進入(ru)(ru)冷卻區使(shi)(shi)焊(han)(han)(han)(han)點凝固。 

回(hui)(hui)流焊(han)(han)(han)(han)(han)(han)辦(ban)法介(jie)紹: 機(ji)器(qi)種(zhong)類(lei) 加(jia)(jia)熱(re)(re)辦(ban)法 長(chang)處(chu) 缺點 (力鋒(feng)S系(xi)列(lie) M系(xi)列(lie) MCR系(xi)列(lie) ROHS系(xi)列(lie)產(chan)品) 全(quan)紅外(wai)(wai)回(hui)(hui)流焊(han)(han)(han)(han)(han)(han):輻射傳導熱(re)(re)功率高(gao)(gao),溫(wen)(wen)(wen)度(du)(du)陡度(du)(du)大(da),易(yi)(yi)操控溫(wen)(wen)(wen)度(du)(du)曲線,雙(shuang)面焊(han)(han)(han)(han)(han)(han)時(shi)PCB上(shang)下溫(wen)(wen)(wen)度(du)(du)易(yi)(yi)操控。有陰(yin)影(ying)效(xiao)(xiao)應(ying)(ying),溫(wen)(wen)(wen)度(du)(du)不(bu)均勻、容(rong)易(yi)(yi)造成元件或(huo)PCB局(ju)部(bu)燒壞 熱(re)(re)風回(hui)(hui)流焊(han)(han)(han)(han)(han)(han): 對流傳導 溫(wen)(wen)(wen)度(du)(du)均勻、焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)質(zhi)量(liang)(liang)(liang)(liang)好。 溫(wen)(wen)(wen)度(du)(du)梯度(du)(du)不(bu)易(yi)(yi)操控 強(qiang)制(zhi)熱(re)(re)風回(hui)(hui)流焊(han)(han)(han)(han)(han)(han): 紅外(wai)(wai)熱(re)(re)風混合(he)加(jia)(jia)熱(re)(re) 結合(he)紅外(wai)(wai)和熱(re)(re)風爐的(de)(de)(de)(de)(de)長(chang)處(chu),在產(chan)品焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)時(shi),可(ke)得到優秀的(de)(de)(de)(de)(de)焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)效(xiao)(xiao)果(guo)   由于回(hui)(hui)流焊(han)(han)(han)(han)(han)(han)工藝(yi)有"再(zai)(zai)活(huo)動"及"自(zi)(zi)(zi)定位效(xiao)(xiao)應(ying)(ying)"的(de)(de)(de)(de)(de)特色,使(shi)回(hui)(hui)流焊(han)(han)(han)(han)(han)(han)工藝(yi)對貼裝(zhuang)精度(du)(du)要(yao)(yao)求(qiu)比較(jiao)寬松(song),比較(jiao)容(rong)易(yi)(yi)完(wan)成焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)的(de)(de)(de)(de)(de)高(gao)(gao)度(du)(du)自(zi)(zi)(zi)動化與高(gao)(gao)速度(du)(du)。一起也正因為再(zai)(zai)活(huo)動及自(zi)(zi)(zi)定位效(xiao)(xiao)應(ying)(ying)的(de)(de)(de)(de)(de)特色,回(hui)(hui)流焊(han)(han)(han)(han)(han)(han)工藝(yi)對焊(han)(han)(han)(han)(han)(han)盤(pan)規劃、元器(qi)件標準化、元器(qi)件端頭與印(yin)制(zhi)板質(zhi)量(liang)(liang)(liang)(liang)、焊(han)(han)(han)(han)(han)(han)料質(zhi)量(liang)(liang)(liang)(liang)以及工藝(yi)參數的(de)(de)(de)(de)(de)設置有更嚴格的(de)(de)(de)(de)(de)要(yao)(yao)求(qiu)。 清洗(xi)(xi)是(shi)使(shi)用物(wu)理(li)效(xiao)(xiao)果(guo)、化學(xue)反(fan)應(ying)(ying)去(qu)除被清洗(xi)(xi)物(wu)外(wai)(wai)表(biao)的(de)(de)(de)(de)(de)污染物(wu)、雜質(zhi)的(de)(de)(de)(de)(de)進程。無論是(shi)采用溶劑清洗(xi)(xi)或(huo)水(shui)清洗(xi)(xi),都(dou)要(yao)(yao)通過外(wai)(wai)表(biao)潮(chao)濕(shi)、溶解、乳化效(xiao)(xiao)果(guo)、皂化效(xiao)(xiao)果(guo)等,并通過施加(jia)(jia)不(bu)同辦(ban)法的(de)(de)(de)(de)(de)機(ji)械力將污物(wu)從外(wai)(wai)表(biao)拼裝(zhuang)板外(wai)(wai)表(biao)剝(bo)離(li)下來,然(ran)后漂洗(xi)(xi)或(huo)沖刷干凈(jing),最終吹干、烘干或(huo)自(zi)(zi)(zi)然(ran)枯燥。 回(hui)(hui)流焊(han)(han)(han)(han)(han)(han)作為SMT出產(chan)中的(de)(de)(de)(de)(de)要(yao)(yao)害(hai)工序,合(he)理(li)的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)度(du)(du)曲線設置是(shi)確(que)保回(hui)(hui)流焊(han)(han)(han)(han)(han)(han)質(zhi)量(liang)(liang)(liang)(liang)的(de)(de)(de)(de)(de)要(yao)(yao)害(hai)。不(bu)恰當的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)度(du)(du)曲線會使(shi)PCB板出現焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)不(bu)全(quan)、虛焊(han)(han)(han)(han)(han)(han)、元件翹(qiao)立、焊(han)(han)(han)(han)(han)(han)錫球過多等焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)缺點,影(ying)響產(chan)質(zhi)量(liang)(liang)(liang)(liang)量(liang)(liang)(liang)(liang)。

 SMT是(shi)(shi)一(yi)項綜(zong)合的(de)(de)(de)體系(xi)工(gong)(gong)程(cheng)技術(shu),其(qi)(qi)涉及范圍包括基(ji)板(ban)、規劃、設備、元(yuan)(yuan)器(qi)(qi)件(jian)(jian)(jian)(jian)、拼(pin)裝工(gong)(gong)藝、出產輔料(liao)(liao)(liao)和(he)辦(ban)理等(deng)。SMT設備和(he)SMT工(gong)(gong)藝對(dui)操作現場要(yao)(yao)(yao)(yao)(yao)(yao)求電(dian)(dian)(dian)壓(ya)要(yao)(yao)(yao)(yao)(yao)(yao)安穩,要(yao)(yao)(yao)(yao)(yao)(yao)防(fang)止(zhi)電(dian)(dian)(dian)磁攪(jiao)擾,要(yao)(yao)(yao)(yao)(yao)(yao)防(fang)靜電(dian)(dian)(dian),要(yao)(yao)(yao)(yao)(yao)(yao)有(you)(you)良(liang)好的(de)(de)(de)照明和(he)廢氣(qi)排放設備,對(dui)操作環境(jing)的(de)(de)(de)溫(wen)(wen)度(du)(du)、濕度(du)(du)、空氣(qi)清潔度(du)(du)等(deng)都有(you)(you)專(zhuan)門要(yao)(yao)(yao)(yao)(yao)(yao)求,操作人(ren)員也應(ying)通(tong)(tong)(tong)(tong)過(guo)(guo)(guo)(guo)專(zhuan)業(ye)技術(shu)培訓(xun)。 波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)是(shi)(shi)指將熔(rong)化的(de)(de)(de)軟釬焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)料(liao)(liao)(liao)(鉛錫(xi)(xi)(xi)(xi)合金),經電(dian)(dian)(dian)動(dong)泵(beng)或(huo)電(dian)(dian)(dian)磁泵(beng)噴(pen)流(liu)(liu)(liu)(liu)(liu)成(cheng)(cheng)規劃要(yao)(yao)(yao)(yao)(yao)(yao)求的(de)(de)(de)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)料(liao)(liao)(liao)波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng),亦可通(tong)(tong)(tong)(tong)過(guo)(guo)(guo)(guo)向(xiang)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)料(liao)(liao)(liao)池(chi)注入(ru)氮氣(qi)來構(gou)成(cheng)(cheng),使(shi)預(yu)先裝有(you)(you)元(yuan)(yuan)器(qi)(qi)件(jian)(jian)(jian)(jian)的(de)(de)(de)印(yin)制(zhi)板(ban)通(tong)(tong)(tong)(tong)過(guo)(guo)(guo)(guo)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)料(liao)(liao)(liao)波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng),完(wan)成(cheng)(cheng)元(yuan)(yuan)器(qi)(qi)件(jian)(jian)(jian)(jian)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)端(duan)或(huo)引腳(jiao)(jiao)(jiao)與(yu)(yu)(yu)印(yin)制(zhi)板(ban)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)盤(pan)(pan)之間機(ji)(ji)(ji)械(xie)與(yu)(yu)(yu)電(dian)(dian)(dian)氣(qi)銜接(jie)(jie)(jie)的(de)(de)(de)軟釬焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)。依據(ju)機(ji)(ji)(ji)器(qi)(qi)所使(shi)用(yong)(yong)不同(tong)(tong)幾(ji)何形狀的(de)(de)(de)波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng),波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)體系(xi)可分許多種。 波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)流(liu)(liu)(liu)(liu)(liu)程(cheng):將元(yuan)(yuan)件(jian)(jian)(jian)(jian)插入(ru)相應(ying)的(de)(de)(de)元(yuan)(yuan)件(jian)(jian)(jian)(jian)孔中 →預(yu)涂助焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)劑(ji)→預(yu)烘(溫(wen)(wen)度(du)(du)90-100度(du)(du),長度(du)(du)0.8-2.0m)→波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(220-2400C)→ 切除(chu)剩余插件(jian)(jian)(jian)(jian)腳(jiao)(jiao)(jiao) → 檢查。 回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)工(gong)(gong)藝是(shi)(shi)通(tong)(tong)(tong)(tong)過(guo)(guo)(guo)(guo)從頭(tou)熔(rong)化預(yu)先分配(pei)到印(yin)制(zhi)板(ban)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)盤(pan)(pan)上的(de)(de)(de)膏(gao)狀軟釬焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)料(liao)(liao)(liao),完(wan)成(cheng)(cheng)外(wai)(wai)表(biao)(biao)(biao)(biao)拼(pin)裝元(yuan)(yuan)器(qi)(qi)件(jian)(jian)(jian)(jian)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)端(duan)或(huo)引腳(jiao)(jiao)(jiao)與(yu)(yu)(yu)印(yin)制(zhi)板(ban)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)盤(pan)(pan)之間機(ji)(ji)(ji)械(xie)與(yu)(yu)(yu)電(dian)(dian)(dian)氣(qi)銜接(jie)(jie)(jie)的(de)(de)(de)軟釬焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)。 波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)跟著人(ren)們對(dui)環境(jing)保護意識(shi)的(de)(de)(de)增強有(you)(you)了(le)(le)新的(de)(de)(de)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)工(gong)(gong)藝。以前(qian)的(de)(de)(de)是(shi)(shi)采用(yong)(yong)錫(xi)(xi)(xi)(xi)鉛合金,但是(shi)(shi)鉛是(shi)(shi)重(zhong)金屬(shu)對(dui)人(ren)體有(you)(you)很大的(de)(de)(de)損傷。所以現在(zai)(zai)(zai)(zai)有(you)(you)了(le)(le)無鉛工(gong)(gong)藝的(de)(de)(de)發生。它采用(yong)(yong)了(le)(le)*錫(xi)(xi)(xi)(xi)銀銅合金*和(he)特(te)殊(shu)的(de)(de)(de)助焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)劑(ji)且(qie)(qie)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)接(jie)(jie)(jie)溫(wen)(wen)度(du)(du)的(de)(de)(de)要(yao)(yao)(yao)(yao)(yao)(yao)求更高(gao)更高(gao)的(de)(de)(de)預(yu)熱(re)(re)(re)(re)(re)溫(wen)(wen)度(du)(du)還要(yao)(yao)(yao)(yao)(yao)(yao)說(shuo)一(yi)點在(zai)(zai)(zai)(zai)PCB板(ban)過(guo)(guo)(guo)(guo)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)區(qu)(qu)(qu)(qu)后(hou)(hou)(hou)要(yao)(yao)(yao)(yao)(yao)(yao)建立(li)一(yi)個冷(leng)卻(que)(que)(que)區(qu)(qu)(qu)(qu)工(gong)(gong)作站.這一(yi)方(fang)面是(shi)(shi)為(wei)了(le)(le)防(fang)止(zhi)熱(re)(re)(re)(re)(re)沖擊另一(yi)方(fang)面如果有(you)(you)ICT的(de)(de)(de)話會(hui)對(dui)檢測有(you)(you)影(ying)響. 波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)根本能夠里(li)(li)解為(wei),它對(dui)稍大相對(dui)小元(yuan)(yuan)件(jian)(jian)(jian)(jian)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)錫(xi)(xi)(xi)(xi),他跟回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)不同(tong)(tong)之處就在(zai)(zai)(zai)(zai)這,而(er)回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)它對(dui)板(ban)子(zi)(zi)與(yu)(yu)(yu)元(yuan)(yuan)件(jian)(jian)(jian)(jian)加(jia)(jia)溫(wen)(wen),其(qi)(qi)實就是(shi)(shi)把(ba)(ba)原來刷(shua)上去的(de)(de)(de)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)膏(gao)給(gei)液(ye)化了(le)(le),以到達把(ba)(ba)元(yuan)(yuan)件(jian)(jian)(jian)(jian)與(yu)(yu)(yu)板(ban)子(zi)(zi)相接(jie)(jie)(jie)的(de)(de)(de)目地.1.波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)工(gong)(gong)作辦(ban)法:板(ban)子(zi)(zi)進(jin)入(ru)機(ji)(ji)(ji)器(qi)(qi)口-感應(ying)器(qi)(qi)感應(ying)到后(hou)(hou)(hou)-噴(pen)FLUX(助焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)劑(ji))-預(yu)熱(re)(re)(re)(re)(re)區(qu)(qu)(qu)(qu)開端(duan)預(yu)熱(re)(re)(re)(re)(re)-噴(pen)錫(xi)(xi)(xi)(xi)處開端(duan)噴(pen)錫(xi)(xi)(xi)(xi)-降(jiang)溫(wen)(wen).2.回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)工(gong)(gong)作辦(ban)法:幾(ji)個溫(wen)(wen)區(qu)(qu)(qu)(qu)加(jia)(jia)熱(re)(re)(re)(re)(re)-錫(xi)(xi)(xi)(xi)液(ye)化-降(jiang)溫(wen)(wen). 波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han):熔(rong)融的(de)(de)(de)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)錫(xi)(xi)(xi)(xi)構(gou)成(cheng)(cheng)波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)對(dui)元(yuan)(yuan)件(jian)(jian)(jian)(jian)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie); 回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han):高(gao)溫(wen)(wen)熱(re)(re)(re)(re)(re)風構(gou)成(cheng)(cheng)回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)對(dui)元(yuan)(yuan)件(jian)(jian)(jian)(jian)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)。 回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)是(shi)(shi)在(zai)(zai)(zai)(zai)爐前(qian)現已有(you)(you)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)料(liao)(liao)(liao),在(zai)(zai)(zai)(zai)爐子(zi)(zi)里(li)(li)僅僅把(ba)(ba)錫(xi)(xi)(xi)(xi)膏(gao)消融而(er)構(gou)成(cheng)(cheng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)點, 波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)是(shi)(shi)在(zai)(zai)(zai)(zai)爐前(qian)沒有(you)(you)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)料(liao)(liao)(liao),在(zai)(zai)(zai)(zai)爐子(zi)(zi)里(li)(li)通(tong)(tong)(tong)(tong)過(guo)(guo)(guo)(guo)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)料(liao)(liao)(liao)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie). 回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)是(shi)(shi)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)貼片元(yuan)(yuan)件(jian)(jian)(jian)(jian)的(de)(de)(de),波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)插腳(jiao)(jiao)(jiao)元(yuan)(yuan)件(jian)(jian)(jian)(jian) 現在(zai)(zai)(zai)(zai)來講很多板(ban)是(shi)(shi)二者兼用(yong)(yong)的(de)(de)(de),一(yi)般都是(shi)(shi)先貼片(無腳(jiao)(jiao)(jiao),外(wai)(wai)表(biao)(biao)(biao)(biao)貼裝)過(guo)(guo)(guo)(guo)完(wan)回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)再(zai)插件(jian)(jian)(jian)(jian)(有(you)(you)腳(jiao)(jiao)(jiao))然后(hou)(hou)(hou)再(zai)過(guo)(guo)(guo)(guo)波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)機(ji)(ji)(ji)。 回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)是(shi)(shi)先在(zai)(zai)(zai)(zai)表(biao)(biao)(biao)(biao)貼焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)盤(pan)(pan)上面涂錫(xi)(xi)(xi)(xi)膏(gao),然后(hou)(hou)(hou)將表(biao)(biao)(biao)(biao)貼器(qi)(qi)件(jian)(jian)(jian)(jian)固(gu)定在(zai)(zai)(zai)(zai)上面,加(jia)(jia)熱(re)(re)(re)(re)(re)溶(rong)(rong)化的(de)(de)(de)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)辦(ban)法。 波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)是(shi)(shi)波(bo)(bo)(bo)(bo)(bo)濤(tao)滾動(dong)的(de)(de)(de)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)錫(xi)(xi)(xi)(xi)給(gei)元(yuan)(yuan)器(qi)(qi)件(jian)(jian)(jian)(jian)引腳(jiao)(jiao)(jiao)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)錫(xi)(xi)(xi)(xi)。 故回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)只(zhi)能焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)貼片元(yuan)(yuan)器(qi)(qi)件(jian)(jian)(jian)(jian),波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)能夠焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)插件(jian)(jian)(jian)(jian)元(yuan)(yuan)器(qi)(qi)件(jian)(jian)(jian)(jian)和(he)簡略(lve)封閉(bi)的(de)(de)(de)外(wai)(wai)表(biao)(biao)(biao)(biao)貼片元(yuan)(yuan)器(qi)(qi)件(jian)(jian)(jian)(jian)。 波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)與(yu)(yu)(yu)回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)差異 1、回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)通(tong)(tong)(tong)(tong)過(guo)(guo)(guo)(guo)預(yu)熱(re)(re)(re)(re)(re)區(qu)(qu)(qu)(qu),回(hui)(hui)(hui)(hui)(hui)流(liu)(liu)(liu)(liu)(liu)區(qu)(qu)(qu)(qu),冷(leng)卻(que)(que)(que)區(qu)(qu)(qu)(qu)。別的(de)(de)(de),波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)適(shi)用(yong)(yong)于手插板(ban)和(he)點膠板(ban),而(er)且(qie)(qie)要(yao)(yao)(yao)(yao)(yao)(yao)求所有(you)(you)元(yuan)(yuan)件(jian)(jian)(jian)(jian)要(yao)(yao)(yao)(yao)(yao)(yao)耐熱(re)(re)(re)(re)(re),過(guo)(guo)(guo)(guo)波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)外(wai)(wai)表(biao)(biao)(biao)(biao)不能夠有(you)(you)從前(qian)SMT錫(xi)(xi)(xi)(xi)膏(gao)的(de)(de)(de)元(yuan)(yuan)件(jian)(jian)(jian)(jian),SMT錫(xi)(xi)(xi)(xi)膏(gao)的(de)(de)(de)板(ban)子(zi)(zi)就只(zhi)能夠過(guo)(guo)(guo)(guo)再(zai)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han),不能夠用(yong)(yong)波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)。 2、波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)是(shi)(shi)通(tong)(tong)(tong)(tong)過(guo)(guo)(guo)(guo)錫(xi)(xi)(xi)(xi)槽將錫(xi)(xi)(xi)(xi)條溶(rong)(rong)成(cheng)(cheng)液(ye)態,使(shi)用(yong)(yong)電(dian)(dian)(dian)機(ji)(ji)(ji)攪(jiao)動(dong)構(gou)成(cheng)(cheng)波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng),讓(rang)PCB與(yu)(yu)(yu)部品焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)起來,一(yi)般用(yong)(yong)在(zai)(zai)(zai)(zai)手插件(jian)(jian)(jian)(jian)的(de)(de)(de)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)和(he)smt的(de)(de)(de)膠水板(ban)。再(zai)流(liu)(liu)(liu)(liu)(liu)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)首要(yao)(yao)(yao)(yao)(yao)(yao)用(yong)(yong)在(zai)(zai)(zai)(zai)SMT職業(ye),它通(tong)(tong)(tong)(tong)過(guo)(guo)(guo)(guo)熱(re)(re)(re)(re)(re)風或(huo)其(qi)(qi)他熱(re)(re)(re)(re)(re)輻(fu)射傳(chuan)導,將印(yin)刷(shua)在(zai)(zai)(zai)(zai)PCB上的(de)(de)(de)錫(xi)(xi)(xi)(xi)膏(gao)熔(rong)化與(yu)(yu)(yu)部品焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)起來。 3、工(gong)(gong)藝不同(tong)(tong):波(bo)(bo)(bo)(bo)(bo)峰(feng)(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)要(yao)(yao)(yao)(yao)(yao)(yao)先噴(pen)助焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)劑(ji),再(zai)通(tong)(tong)(tong)(tong)過(guo)(guo)(guo)(guo)預(yu)熱(re)(re)(re)(re)(re),焊(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie),冷(leng)卻(que)(que)(que)區(qu)(qu)(qu)(qu)。
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