The utility model discloses a high frequency welding device for small diameter thick-walled pipes, including a high frequency welding machine, which is composed of a high frequency generator and a feeding device. The feeding device comprises an induction coil and an impedance device. The impedance device is located above the welding seam of the thick-walled pipes to be welded. The impedance device includes a water catchment box, and an induction conductor is arranged at the bottom of the water catchment box. The bottom of the water catchment box is provided with a magnetic conducting body with magnetic concentrating effect, and a cooling medium for cooling the magnetic conducting body is arranged in the water catchment box. The utility model has reasonable structure design and can effectively weld steel pipes with thickness-diameter ratio greater than 10% without magnetic rods in the pipe, which has great significance in the application of filling materials in the welded pipe, especially for the core-wrapped wire used for welding ladle refining, which increases the depth of the core-wrapped wire feeding into the molten iron in the furnace, greatly improves the material yield, reduces the production cost and reduces the ring. Environmentally polluted; no air will enter the core wire, which ensures the activity of active substances.
【技术实现步骤摘要】
一种用于小直径厚壁管的高频焊接装置
本技术涉及一种焊接设备,尤其是一种用于小直径厚壁管的高频焊接装置。
技术介绍
普通钢管的现有高频焊接方法有感应焊接和接触焊接两种方法。感应焊接是在经机械轧制即将闭合的管子圆周外缠绕通水铜制感应圈。感应圈中通以交变的高频电流。在管壁的内外侧会感应高频交变电流,该电流会使钢管整体发热,属无效电流。另一个感应电流的流动路径是经感应圈对应的钢管外壁流经V型闭合角。由于高频电流的临近效应,越靠近V型顶点,电流越集中。因此V型顶点迅速被加热至融化温度,在挤压辊的压合下焊接在一起。这一电流路径是有效路径。在生产中为了尽量减小无效路径的电流,增大有效路径的电流,我们在管内放置了相对感应圈位置固定的磁棒。可以起到阻止部分无效路径电流,增大有效路径电流的作用。这在薄壁管子的焊接中可能效果小一点,在焊接大厚径比的管子时,比如厚径比达到10%以上时。磁棒的有无可能决定焊接的成败。接触焊接是把电极直接安放在即将闭合的两个管壁边缘,电流经V型开口角形成闭合回路。接触焊接具有效率高的特点。但通常应用在管径大于25mm的大管径的焊接。在小管径的焊接时由于机构的 ...
【技术保护点】
1.一种用于小直径厚壁管的高频焊接装置,包括高频焊接机,所述高频焊接机由高频发生器和馈电装置组成,所述馈电装置包括感应圈和阻抗器,其特征在于:所述阻抗器位于待焊接厚壁管焊缝的上方。
【技术特征摘要】
1.一种用于小直径厚壁管的高频焊接装置,包括高频焊接机,所述高频焊接机由高频发生器和馈电装置组成,所述馈电装置包括感应圈和阻抗器,其特征在于:所述阻抗器位于待焊接厚壁管焊缝的上方。2.根据权利要求1所述的用于小直径厚壁管的高频焊接装置,其特征在于:所述阻抗器包括集水盒,在所述集水盒的底面设有施感导体,在所述集水盒的底部设有聚磁作用的导磁体,所述集水盒中装有冷却导磁体的冷却介质。3.根据权利要求2所述的用于小直径厚壁管的高频焊接装置,其特征在于:所述施感导体为紫铜管,其外径为4.0mm—8.0mm,壁厚为0.3mm—...
【专利技术属性】
技术研发人员:耿开博,于庆,蔡士忠,
申请(专利权)人:山东汉尚新型材料有限公司,
类型:新型
国别省市:山东,37
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。