焊接與銀釬焊SOLDERING AND SILVER BRAZING

　　務(wù)必記住所推薦的閥門的用途是什么厨杆，并對所應(yīng)用的環(huán)境進(jìn)行分析硅蹦，這樣才能決定選用最適合安裝什么樣的閥門剑鞍。在安裝正確的閥門之前怜浅，為了防止損壞閥門铐然，并保證充分發(fā)揮閥門的工作性能，請閱讀一下安裝指南：Analyze the application to determine which valve is best suited for installations, keeping in mind the service for which the valve is recommended. Before installing the correct valve, review the installation instructions to prevent damage to the valve and to assure its maximum efficiency：

　　先沿著垂直方向切割管道恶座，并修整搀暑、去除毛刺，測量管徑跨琳。Cut tube end square. Ream, burr and size.

　　使用紗布或鋼絲刷清除管道和切割部位自点，使其金屬表面發(fā)光發(fā)亮。建議不要使用鋼絲絨脉让。Use sand cloth or steel wire brush to clean both ends to a bright metal finish. Steel wool is not recommended.

　　在管道的外面和焊接罩的內(nèi)部涂上焊劑桂敛，焊劑必須完全覆蓋焊接表面。請有節(jié)制地使用焊劑溅潜。Apply flux to outside of tube and inside of solder cup. Surfaces to be joined must be completely covered. Use flux sparingly.

　　要確保閥門處于開啟狀態(tài)术唬。先對管道加熱。盡可能多的將熱從管道傳遞到閥門墅瑟。避免延長閥門本身的加熱時(shí)間避扎。Be sure that valve is fully open. Apply heat to tube first. Transfer as much heat as possible through tube into valve. Avoid prolonged heating of valve itself.

　　銀釬焊的方法：對需要進(jìn)行釬焊的部件進(jìn)行組裝。如果允許涂上焊劑的部件處于直立狀態(tài)枪素，那么焊劑中的水分會蒸發(fā)掉咬跷，而干燥的焊劑很容易脫落，致使暴露的金屬表面容易被氧化芹倔。在進(jìn)行連接組裝時(shí)演避，要將管道插入管套直到遇到阻擋為止。組裝是要保證有穩(wěn)固的支撐袁虽，使得整個釬焊操作過程中能夠保持在直線位置旭绝。Silver Brazing Method: Assemble parts to be brazed. If fluxed parts are allowed to stand, the water in the flux will evaporate, and dried flux is liable to flake off, exposing metal surfaces to oxidation. Assemble joint by inserting tube into socket hard against the stop. The assembly should be firmly supported so that it will remain in alignment during the brazing operation.

　　注：對于1英寸或更大公稱通徑的閥門，一次性將連接部件加熱到所需溫度比較困難坠髓。為了在整個大面積上保持正常的溫度桨皂，通常情況下需要兩個焊槍茄码。建議對整個管套區(qū)域進(jìn)行適當(dāng)?shù)念A(yù)熱。建議采用乙炔火焰對連接部件進(jìn)行加熱衰屡。首先從離閥門1英寸的地方開始對管道進(jìn)行加熱构韵，然后圍繞著管道短距離上下交替對管道進(jìn)行火焰烘烤，并以適當(dāng)?shù)慕嵌刃D(zhuǎn)管道趋艘，避免燒穿管道疲恢。火焰要連續(xù)運(yùn)動瓷胧，不允許停留在某一點(diǎn)上显拳。NOTE: On one-inch and larger valves, it is difficult to bring the whole joint up to temperature at one time. It will frequently be found desirable to use a double-tip torch to maintain the proper temperature over the larger area. A mild pre-heating of the whole socket area is recommended. Apply heat to parts to be joined. The preferred method is by oxy-acetylene flame. Heat tube first, beginning one inch from edge of valve. Sweep flame around tube in short strokes up and down at right angles to run of tube. To avoid burning through tube, the flame should be in continuous motion and not allowed to remain on any one point.

　　在閥門的套筒底座用火焰進(jìn)行烘烤。加熱要均勻搓萧，用火焰對閥門及管道進(jìn)行火焰烘烤的過程要延續(xù)到閥門上的焊劑不再發(fā)出聲音杂数。不要對閥門過度加熱。Apply flame to valve at base of socket. Heat uniformly, sweeping flame from valve to tube until flux on valve becomes quiet. Avoid excessive heating of valve.

　　當(dāng)焊劑變成液態(tài)并且在管道和閥門上呈現(xiàn)半透明狀態(tài)時(shí)瘸洛，開始將火焰沿著連接部件的軸線進(jìn)行進(jìn)退烘烤揍移，以保持連接部件、特別是閥門套筒底座部位的熱度反肋。When flux appears liquid and transparent on both tube and valve, start sweeping flame back and forth along axis of joint to maintain heat on parts to be joined, especially toward base of valve socket.

　　使用適量的焊料：如果使用線狀焊料那伐，那么對公稱通徑為3/4英寸的閥門就要采用3/4英寸的焊料，等等石蔗。如果使用的焊料太多披滑，那么有些焊料可能會流過管道阻擋部位，并堵塞密封區(qū)域方较。在安裝連接部件時(shí)窗项，可以看到焊料和釬焊合金繼續(xù)流動Use just enough solder: with wire solder, use 3/4" for a 3/4" valve, etc. If too much solder is used, it may flow past tube stop and clog sealing area. When joint is filled, a continuous run of solder or brazing alloy will be visible.

　　銀釬焊法：將焊線或焊桿點(diǎn)在閥門里的管道套座上粮忍。當(dāng)焊桿或焊線進(jìn)入連接處時(shí)要將火焰從其上面移開衷求。當(dāng)合金流進(jìn)連接處時(shí)，要前后移動火焰肄蓄。達(dá)到適當(dāng)?shù)臏囟群蟾愣剑辖饘⒀杆偃菀椎亓鬟M(jìn)管道外殼和閥門套管之間的空間。連接處被充滿后偷瀑，就會看到焊接合金的邊緣胚搂。Silver Brazing Method: Apply brazing wire or rod at point where tube enters valve socket. Keep flame away from rod or wire as it is fed into the joint. Move flame back and forth as alloy is drawn into joint. When the proper temperature is reached alloy will flow readily into space between tube outer wall and valve socket. When joint is filled, a continuous rim of brazing alloy will be visible.

聲明：本網(wǎng)站所收集的部分公開資料來源于互聯(lián)網(wǎng)，轉(zhuǎn)載的目的在于傳遞更多信息及用于網(wǎng)絡(luò)分享叶皿，并不代表本站贊同其觀點(diǎn)和對其真實(shí)性負(fù)責(zé)脐炼，也不構(gòu)成任何其他建議。本站部分作品是由網(wǎng)友自主投稿和發(fā)布拢掷、編輯整理上傳丁恭，對此類作品本站僅提供交流平臺曹动，不為其版權(quán)負(fù)責(zé)。如果您發(fā)現(xiàn)網(wǎng)站上所用視頻牲览、圖片墓陈、文字如涉及作品版權(quán)問題，請第一時(shí)間告知第献，我們將根據(jù)您提供的證明材料確認(rèn)版權(quán)并按國家標(biāo)準(zhǔn)支付稿酬或立即刪除內(nèi)容贡必，以保證您的權(quán)益！聯(lián)系電話：010-58612588 或 Email:editor@mmsonline.com.cn庸毫。