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Old 05-13-2011, 11:45 AM   #1
qdsk90vfxl
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Default |清大圣科气化炉反骗子.|手工电弧焊工艺操作方法、中

焊条的保管:各类焊条必须分类、分牌号存放,避免混乱,同时应存放在干燥、通风良好的仓库内,并要放置在离 地面及墙壁不少于300mm处,以防受潮变质××清大圣科×清大圣科 电焊条×清大圣科电焊条设备×清大金桥×清大金桥电焊条设备&tim es;清大圣科气化炉×www.qhsk.cn×清大圣科科技有限公司&time s;×

操作:将工件结合后,先点焊牢固,开始焊接,焊缝的宽深比为2~3,焊缝宽一般为1.5~2倍&times ;×清大圣科×清大圣科电焊条×清大圣科电焊条设备×清 大金桥×清大金桥电焊条设备×清大圣科气化炉×www.qhsk.c n×清大圣科科技有限公司××
接头由于受焊条长度的限制,有时不能用一根焊条完成一条焊缝,要求先焊的焊缝起头处略低一些,接头时在先焊 焊缝的起头稍前处引弧,并稍微拉长电弧将电弧引向起头处,并覆盖前焊缝的端头处,待起头处焊缝焊平后再沿焊 接方向移动××清大圣科×清大圣科电焊条×清大圣科电焊 条设备×清大金桥×清大金桥电焊条设备×清大圣科气化炉&times ;www.qhsk.cn×清大圣科科技有限公司××

由于药皮容易受潮,受潮后的焊条工艺性能变坏,而且水分中的氢容易使焊缝产生气孔和裂纹,故焊条使用前必须 烘干,以降低焊条的含氢量,一般采用350~450º,保温1~2小时,烘干×&t imes;清大圣科×清大圣科电焊条×清大圣科电焊条设备×清大金桥 ×清大金桥电焊条设备×清大圣科气化炉×www.qhsk.cn&t imes;清大圣科科技有限公司××

焊缝宽的一般用锯齿形或月牙形运条法,这种方法焊出的焊缝加强高较高,金属熔化良好,有较长的保温时间,易 使气体析出和熔渣浮到表面上来,对提高焊缝质量有好处××清大圣科× 清大圣科电焊条×清大圣科电焊条设备×清大金桥×清大金桥电焊条设备 ×清大圣科气化炉×www.qhsk.cn×清大圣科科技有限公司& times;×

焊缝收尾是指一条焊缝焊完时,应把收尾处的弧坑填满,如果收尾时立即拉断电弧,会形成低于焊件表面的弧坑, 过深使焊缝收尾处强度减弱,导致产生裂纹××清大圣科×清大圣科电焊 条×清大圣科电焊条设备×清大金桥×清大金桥电焊条设备&times ;清大圣科气化炉×www.qhsk.cn×清大圣科科技有限公司× × 因此在收尾时不允许有弧坑存在,应将弧坑填满为止××清大圣科×清大 圣科电焊条×清大圣科电焊条设备×清大金桥×清大金桥电焊条设备&t imes;清大圣科气化炉×www.qhsk.cn×清大圣科科技有限公司&ti mes;×

起头焊缝是指刚开始焊接的部分,应该在引弧后先将电弧稍拉长,对焊缝端头进行必要的预热,然后适当缩短弧长 进行正常焊接××清大圣科×清大圣科电焊条×清大圣科电 焊条设备×清大金桥×清大金桥电焊条设备×清大圣科气化炉&time s;www.qhsk.cn×清大圣科科技有限公司××
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