What should I pay attention to in manual welding?

1, select the standard welding processing technology, the diameter of the decorative design of weathering steel, welding current, welding rate, welding arc length, etc., according to the welding processing process experiment certification.

2, remove the welding joint: before welding, check whether the weld and the assembly gap are in accordance with the regulations, the precise positioning welding is not strong, and there can be no oil stains and rust around the welding.

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3, cake baking weathering steel decoration design to meet the requirements of temperature and time, from the drying box to take the electrode, into the electrode insulation bucket, at any time to use with.

4, welding current: according to the welding parts thickness, welding level, welding rod model specifications, diameter, welder mastery and other factors, select the appropriate welding current.

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5, arc initiation: the takeoff and landing arc point of fillet weld should be at the top of the welding, should be more than 11mm, not at will, after the ignition of the arc should immediately open the electrode from the welding area, so that the electrode and the prefabricated component maintain 2 ~ 4mm gap resulting in electrical isolation. The butt weld is immediately connected and the Angle is welded, and the arc plate and the leading plate are arranged on both sides of the welding, and must be welded to the welding area after the arc is started on the arc plate, and the halfway connection head should be ignited at 15 to 20 mm in front of the welding connection head, and then the corten steel decorative design should be returned to the welding start and end, and the solution pool is covered with the specified thickness.

6, welding speed: uniform welding, to ensure that the welding thickness, the total width of uniform, from the mask to see the molten steel and slag in the tank to maintain equal spacing (2 ~ 5 mm) is appropriate.

7, welding arc length: according to the welding rod model specifications are not the same and clear, the general provisions of the arc length is stable and will not change, acid-alkali wear-resistant wire is generally 3 ~ 4mm, alkali wear-resistant wire is generally 2 ~ 3mm is appropriate.

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8, welding Angle of view: according to the thickness of the two welding parts is clear, the welding Angle has two levels, one is the Angle between the electrode and the correct direction of welding is 60 ~ 75°; Second, there are two conditions between the decorative design of weathering steel and the upper and lower Angle of welding. When the welding part is the same thickness, the Angle between the electrode and the welding part is 45°; When the welding part is not thin or thick, the Angle of intersection between the welding rod and the thicker welding part shall exceed the Angle of intersection between the welding rod and the thinner welding part.

9, arc: each welding to the end of the welding, the arc pit should be covered, the opposite direction of the welding bearing with arc, so that the arc pit left in the weld, to prevent the arc pit bite. At the end of welding, oxygen cutting should be used to remove the arc plate, and grinding smooth, can not be destroyed with a hammer.

10, slag removal: eliminate slag after welding, after the welder self-check (including appearance and welding specifications, etc.) there is no problem, you can migrate the address again welding.