With the continu朋睡ous development of production and scie司現nce and technology, 線雨there are many kinds of 器來metal welding methods. According t上影o the characterist中一ics of welding process of spot w大森elder, it can be divided into thr快從ee categories: fusion welding, pressure農說 welding and brazing. In metal weldin鐘可g, the material to be welded and 西冷the material to be w得林elded are called base metal. In add很刀ition to the base metal, some weldin理離g also needs filler meta道理l and solder. In the processing of gla笑拿sses, the frame, foot wire, hinge 銀筆and so on are all base material務妹s; the solder of spot welding ma說讀chine is easy to melt, wh北懂ich has good strength, plasticity and他謝 wettability.
Basic knowledge of e子妹ye spot welding: fusion wel亮他ding. In the process o舞懂f welding, the base met房少al and filler metal are melted, 視子which are chemical co房用mbination. The fusion welding mainly 近雨includes manual welding, plasma welding這林, laser welding, etc. Press w化區elding. When welding, there is no志筆 need of solder, the 山道connected metal is ch時從emical or physical combination,暗務 the weld is narrow and the influen件熱ce area is small. Pressu些店re welding mainly includes resistance 議著flash welding, friction welding, cold 老章pressure welding, e土對tc. Brazing. It is similar t現兵o fusion welding, but the essential dif吃都ference is that the brazing temperatu路校re is lower than the base metal tempe在請rature. When welding, the b拍爸razing filler met藍兒al melts while the base metal does n員報ot melt, and the two are physica空電lly combined.
Brazing belongs to solid phas師服e connection, which is dif刀照ferent from the f著很usion welding meth草火od. When brazing上窗, the base metal 現男does not melt, an器朋d the filler metal with lower m照東elting temperature than the base metal 我說is used. When the c懂動onnected parts and solder are 雨聽heated to solder melti微們ng, the liquid solder is used to 好爸wet, spread and他頻 dissolve and diffuse with the ba讀一se metal on the surface of the base m關男etal, wet, capillar店你y flow and caulk 還文in the gap between 大他the base metal, and dissolve and diffu女街se with the base metal to realize城校 the connection between parts.
The spot welding in the production o人好f spectacles, whic人師h belongs to the scope of 木雨brazing, is define作廠d in principle. Duri紅遠ng welding, the base metal多作, i.e. the workpiece to be welded and t上男he workpiece to be weld資議ed, such as the frame, 線費foot wire and hinge, w樹土ill not melt; while the 舞都brazing filler metal, 外那i.e. the silver師國 sheet, will melt, and the 愛科base metal will be welded throu醫學gh the melting of the brazing filler m遠線etal. Due to the contact新答 between the welding gun and the base 相男metal during the們少 welding of spot welder, the r關校ange of contact welding and 行雪the welding position are mostly in 還關the form of dots,答拍 so it is called "spot w農年elding".
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