Angle iron welding method
A welding method and technology of angle steel, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as easy crack lamination, delay in construction of power transmission lines, narrow application range of large-scale hot-rolled angle steel, etc., and achieve reduction The effect of welding deformation
Pending Publication Date: 2019-02-19
ZHEJIANG SHENGDA STEEL TOWER
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Problems solved by technology
[0003] At present, the method of producing large-size angle steel is hot-rolling in steel mills. However, due to the narrow application range of large-size hot-rolled angle steel and small market demand, steel mills strictly control the production of large-size angle steel. Steel mills usually The production will only start when the order received reaches a certain amount. For scattered orders, the steel mill will not arrange production immediately, which will affect the construction of the angle steel tower and delay the construction of the transmission line
[0004] Q420 low-alloy high-strength steel plate (hereinafter collectively referred to as "steel plate") is very suitable for welding and making large-scale angle steel due to its wide source of materials, cheap price, and high strength. However, because the steel plate contains carbide-forming elements such as V, Ti, and Nb , so the current welding technology and method (plate splicing welding method) is prone to cracks and lamellar tearing technical problems in the process of welding steel plates to prepare angle steel
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[0036] Attached below figure 1 , the present invention is described in detail.
[0037] The invention provides an angle steel welding method for producing an angle steel with a length of 8000 mm and a model L300×28. Select 28mm Q420B steel, ER55-D2 and H10Mn2 welding wire, and SJ101 flux as raw materials, and open the groove in the form of the attached groove, the order is as follows
[0038] S1: Using multi-gun flame cutting equipment to blank the steel plate, the first steel plate 10 (length 8150mm, width 300mm, thickness 28mm) and the second steel plate 11 (length 8150mm, width 270mm, thickness 28mm) are processed by groove milling machine , and use a grinder to grind the inner and outer sides near the side bevel, so that the metallic luster is exposed within 30mm of the vicinity, and confirm that there are no defects within 30mm of the edge of the side bevel;
[0039] S2: Align the first steel plate 10 and the second steel plate 11 into an L-shape, and form a V-shaped fi...
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Abstract
The invention discloses an angle iron welding method. The angle iron welding method comprises the following steps of forming slope openings in a first steel plate and a second steel plate, and vertically aligning the first steel plate with the second steel plate after the slope openings are formed, wherein the first steel plate and the second steel plate are distributed in an L shape, the slope opening in the first steel plate and the slope opening in the second steel plate form a first groove and a second groove, the first groove and the second groove are respectively located in the inner andouter sides of the right-angle end of the L shape, and the first groove and the second groove form a V shape. The angle iron welding method has the following beneficial effects that the welding seamquality of angle iron obtained by welding is stable, cracks and lamellar tearing cannot occur, and the welding deformation can be greatly reduced.
Description
technical field [0001] The invention relates to the field of iron towers, in particular to an angle steel welding method. Background technique [0002] With the continuous development of the national grid construction, the original transmission tower components can no longer meet the technical requirements of UHV transmission or multi-circuit transmission on the same tower. The use of large-scale high-strength angle steel has become a new trend in tower design. The use of large-scale angle steel in the angle steel tower instead of ordinary double or four-piece angle steel can greatly reduce the amount of tower processing, reduce connecting bolts and filling plates, and improve the efficiency of tower construction. Large-scale high-strength angle steel means that the limb width is not less than 220mm, the limb thickness is more than 20mm, and its strength grade is Q420 and above. [0003] At present, the method of producing large-size angle steel is hot-rolling in steel mill...
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IPC IPC(8): B23K9/16B23K9/18B23K9/235
CPCB23K9/16B23K9/18B23K9/235
Inventor 葛晓峰杨建平戴刚平舒芳郑怀清郑苗赵江涛包乐庆周纬施菁华王华黄亮周锋增何燕林捷
Owner ZHEJIANG SHENGDA STEEL TOWER