All-position MAG mechanical welding process and application of pipeline fixing port
A technology for pipe fixing and welding process, applied in the application, welding medium, welding equipment and other directions, can solve the problems of high construction cost, heavy maintenance workload, complex submerged arc welding equipment, etc., to improve welding quality and efficiency, welding High first pass rate, stable and reliable welding quality
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[0026] Example 1
[0027] like figure 1 As shown, this embodiment provides an all-position MAG motorized welding process for a fixed port of a pipeline, including the following steps:
[0028] Step 1. Set the output welding pulse current and voltage value on the welding power source;
[0029] Step 2, delivering the pulse current and voltage to the solid wire;
[0030] Step 3, the solid core welding wire sends the solid core welding wire on the solid core welding wire reel to the arc burning place through the wire feeding wheel;
[0031] Step 4, the arc burns on the pipeline to form a weld;
[0032] Step 5, continue the welding of the next weld.
[0033] In step 2, the power supply voltage output by the welding power source is 18-20V. In step 3, the groove of the welded part of the pipeline is a double V-shaped groove, and the groove angle is 56-80°. The welding material of the solid wire is adapted to the material of the pipe to be welded, and the diameter of the solid w...
Example Embodiment
[0034] Example 2
[0035] This embodiment provides an application of the all-position MAG motorized welding welding process of the fixed port of the pipeline in the welding of the A106Gr.B pipeline. The specific welding steps are the same as those in the embodiment 1, and the differences are as follows:
[0036] In step 1, the pulse current is 140-150A, and the voltage is 18-20V.
[0037] During the welding process, the welding current actually refers to the wire feeding speed. The magnitude of the welding current depends on the speed of the wire feeding. If the welding current is too large, the wire energy will burn the alloy components in the welding material excessively, which will make the welding seam less stable. The overall performance deteriorates. In the process of filling the hot welding layer, it is easy to break down the bottom welding seam, the welding seam is oxidized, and a large splash will cause the end of the contact tip to be blocked, the molten pool will b...
Example Embodiment
[0053] Example 3
[0054] The present embodiment provides an application of the all-position MAG motorized welding welding process of the fixed port of the pipeline in the welding of heat-resistant steel 335-P11 and 335-P11 pipelines. The specific welding steps are the same as those in the embodiment 1, and the differences are as follows:
[0055] In step 1, the pulse current is 130-140A, and the voltage is 18-20V.
[0056] During the welding process, the welding current actually refers to the wire feeding speed. The magnitude of the welding current depends on the speed of the wire feeding. If the welding current is too large, the wire energy will burn the alloy components in the welding material excessively, which will make the welding seam less stable. The overall performance deteriorates. In the process of filling the hot welding layer, it is easy to break down the underlying weld, the weld is oxidized, and a large splash will cause the end of the contact tip to be blocked...
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