高(gao)(gao)溫(wen)(wen)真(zhen)空燒(shao)結(jie)(jie)爐(lu)石墨(mo)(mo)加(jia)(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)(qi)的優點
高(gao)(gao)溫(wen)(wen)真(zhen)空燒(shao)結(jie)(jie)爐(lu)加(jia)(jia)(jia)(jia)熱(re)(re)室(shi)的作(zuo)用(yong)(yong)(yong)(yong)是,承受載(zai)荷(夾具,工(gong)件(jian)(jian)等)、向焊件(jian)(jian)提供熱(re)(re)量。它(ta)(ta)包括加(jia)(jia)(jia)(jia)熱(re)(re)元件(jian)(jian)、輻(fu)(fu)射(she)屏(ping)(ping)、絕熱(re)(re)層,爐(lu)床(chuang)、冷卻(que)管等部件(jian)(jian)。
其(qi)中,輻(fu)(fu)射(she)屏(ping)(ping)用(yong)(yong)(yong)(yong)鑰(yao)板或鑰(yao)板與不(bu)銹鋼板一起(qi)使用(yong)(yong)(yong)(yong)。其(qi)厚(hou)度(du)(du)按爐(lu)子(zi)大小(xiao)可選用(yong)(yong)(yong)(yong)0.3-1.0毫(hao)米。輻(fu)(fu)射(she)屏(ping)(ping)的層數按爐(lu)子(zi)的***高(gao)(gao)加(jia)(jia)(jia)(jia)熱(re)(re)溫(wen)(wen)度(du)(du)而定(ding)。1600°C以下為6~8層,1700°C以上(shang)為8~12層。各(ge)層間距為5?15毫(hao)米。
另外,真(zhen)空燒(shao)結(jie)(jie)爐(lu)石墨(mo)(mo)加(jia)(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)(qi)有(you)棒狀(zhuang)(zhuang)、管狀(zhuang)(zhuang)、筒(tong)狀(zhuang)(zhuang)、板狀(zhuang)(zhuang)和(he)(he)(he)(he)帶狀(zhuang)(zhuang)等多種類(lei)型。
棒狀(zhuang)(zhuang)和(he)(he)(he)(he)管狀(zhuang)(zhuang)電熱(re)(re)元件(jian)(jian),它(ta)(ta)們(men)適應(ying)性強,可在各(ge)類(lei)高(gao)(gao)溫(wen)(wen)真(zhen)空燒(shao)結(jie)(jie)爐(lu)應(ying)用(yong)(yong)(yong)(yong)。筒(tong)狀(zhuang)(zhuang)加(jia)(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)(qi)其(qi)特點是輻(fu)(fu)射(she)面積(ji)(ji)大,加(jia)(jia)(jia)(jia)熱(re)(re)效(xiao)果(guo)好,石墨(mo)(mo)筒(tong)與工(gong)件(jian)(jian)之間溫(wen)(wen)度(du)(du)梯度(du)(du)小(xiao),電接點少(shao),但(dan)受材(cai)料(liao)和(he)(he)(he)(he)加(jia)(jia)(jia)(jia)工(gong)條件(jian)(jian)所限(xian),一般僅(jin)用(yong)(yong)(yong)(yong)于(yu)小(xiao)型。板狀(zhuang)(zhuang)和(he)(he)(he)(he)帶狀(zhuang)(zhuang)加(jia)(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)(qi)。它(ta)(ta)們(men)結(jie)(jie)構簡單,拆裝方便,輻(fu)(fu)射(she)面積(ji)(ji)大,加(jia)(jia)(jia)(jia)熱(re)(re)效(xiao)果(guo)好,有(you)利(li)于(yu)提高(gao)(gao)真(zhen)空燒(shao)結(jie)(jie)爐(lu)均勻度(du)(du),尤其(qi)帶狀(zhuang)(zhuang)加(jia)(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)(qi)應(ying)用(yong)(yong)(yong)(yong)廣泛。帶狀(zhuang)(zhuang)加(jia)(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)(qi)的缺點是不(bu)能用(yong)(yong)(yong)(yong)在有(you)對(dui)流循(xun)環的爐(lu)子(zi)上(shang)。