自动门
成都自动门:常用弯管方法
发布时间:2012/11/29
成都自动门讯:
    (1)手工弯管。
    1)手工弯曲小直径管子。对于一些小直径的管子弯曲,可以利用简单的弯曲模具,采用手工弯曲的方法进行。
    2)手工装砂热弯。这一工艺方法适用于大直径管子或薄壁小直径管子的弯曲。
    (2)弯管机弯管。

    1)有芯弯管。有芯弯管是在弯管机上利用芯轴沿模具弯曲管子;芯轴的作用就是防止管子在弯曲时产生断面变形。

芯轴在弯管中的位置要选择好,芯轴有一端要固定住。模具要根据弯管的走私专门设计,模具有两个:一个是弯管模;

另一个是压紫导轮。

这了保证弯管的质量,弯管前要设计和选择好适当的芯轴与弯管模具;同时,应仔细清理弯管的内壁并涂油润滑,

或采用喷油芯轴。

    2)无芯弯管。
    a.工作原理。无芯弯管的工作原理是利用反弯刑法来控制管子断面的变形而在弯管机上弯曲的方法。

    b.无芯比有芯弯管的优点:大大减少了弯管前的准备工作,提高了劳动生产率;管内不需要润滑,节约了润滑油和喷油

设备;避免了芯轴的消耗;弯管质量好,不仅能保证弯管的圆度,而且管壁拉薄和内壁起皱情况也有很大的改善;弯曲

无振动,无芯轴与管壁的摩擦,降低了弯管力矩,延长了弯管设备的寿命及提高了使用能力。

    c.无应用芯弯管的应用较为广泛,通常是采用此法,只有直径大、管壁较薄时,才采用有芯弯管法。
    (3)加热弯管。
加热弯管的一般原则如下:
    a.冷弯设备、条件不具备。
    b.管子材质要求必须加热弯曲。
    c.管子形状复杂,无法采用冷弯成形。
    d.弯管属一次性生产且数量较少,制作专用冷弯模具不经济。
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