Storage-tank transverse-seam automatic welding rendering two-sides forming welding method

A technology of double-sided forming and welding method, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of heavy workload, poor working conditions of operators, and carbon powder pollution in gouging, and achieves improved efficiency, High-quality welding technology, saving labor costs

Inactive Publication Date: 2009-04-01
CHINA GASOLINEEUM JILIN CHEM ENG & CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional storage tank installation method adopts horizontal seam submerged arc automatic welding, carbon arc gouging and grinding on the back of the bottom (root) welding, the workload is heavy, and the working conditions of the operators are relatively harsh, and the gouging is polluted by carbon powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Groove processing is processed by a CNC cutting machine at one time, and polished with a grinding wheel to expose the metallic luster; the gap between the pairings is 2.5mm, and the spot welding is manual arc welding, and the spot welding is 40mm every 300mm on the outside of the front tank; along the circumferential direction Four welding manipulators are evenly distributed, in the same direction, welding at the same time, welding parameters should be consistent, welding parameters: voltage 22V, current 380A, walking speed 350mm / min, welding torch angle 15°, and set flux delivery and recovery on the back The device achieves welding protection; the coating on the back is cleaned with an electric hammer, and the unevenly formed part is polished with a grinding wheel.

Embodiment 2

[0017] The groove processing is processed by a CNC cutting machine at one time, and polished with a grinding wheel to expose the metallic luster; the pairing gap is 2.8mm, and the spot welding is manual arc welding, and the spot welding is 50mm every 320mm on the outside of the front tank; along the circumferential direction Four welding manipulators are evenly distributed, in the same direction, welding at the same time, welding parameters should be consistent, welding parameters: voltage 24V, current 400A, walking speed 450mm / min, welding torch angle 18°, and set flux delivery and recovery on the back The device achieves welding protection; the coating on the back is cleaned with an electric hammer, and the unevenly formed part is polished with a grinding wheel.

Embodiment 3

[0019] The groove processing is processed by a CNC cutting machine at one time, and polished with a grinding wheel to expose the metallic luster; the gap between the pairings is 3.7mm, and the spot welding adopts manual arc welding, and the spot welding is 55mm every 330mm on the outside of the front tank; along the circumference Four welding manipulators are evenly distributed in the same direction, welding at the same time, and the welding parameters should be consistent. The welding parameters: voltage is 25V, current is 400A, walking speed is 450mm / min, welding torch angle is 20°, and flux delivery is set on the back The recovery device achieves welding protection; the coating on the back is cleaned with an electric hammer, and at the same time, the unevenly formed part is polished with a grinding wheel.

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PUM

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Abstract

An automatic welding backing double-side shaping welding method for transverse joints of a storage tank comprises edge preparation, assembling and back cleaning, and is characterized in that a welding fluid is used for protecting the back surface when welding is carried out after assembling. The welding method guarantees backing (root) welding back surface shaping (double-side shaping), cancels carbon arc air gouging, and reduces more than 80% of grinding wheel polishing, thereby not only economizing on manpower, reducing the labor intensity of operators, saving 50.6% of labor cost, but also eliminating the inhalation of powdered carbon by carbon arc air gouging workers, reducing the air pollution, and simultaneously saving carbon rods, welding materials filling at air gouging rooting parts and grinding wheel sheets polished by grinding wheels, and guaranteeing the welding quality. The average radiographic inspection first-time qualification rate of transverse joints of two storage tank is 98.2%.

Description

technical field [0001] The invention relates to a welding method for a storage tank transverse seam or a similar transverse seam, in particular to a submerged arc automatic welding method for a storage tank transverse seam. Background technique [0002] In order to avoid the risk of national oil supply shortage or interruption, and to ensure the security of my country's medium and long-term oil supply, the state has increased the construction of crude oil reserves of more than one million tons. The traditional storage tank installation method adopts horizontal seam submerged arc automatic welding, carbon arc gouging on the back after bottom (root) welding, and grinding wheel grinding. . Therefore, it is a new topic to further improve the level of automatic welding technology for horizontal seams of storage tanks to make them more efficient, high-quality, reduce labor intensity, and improve the working environment. Contents of the invention [0003] The technical problem ...

Claims

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Application Information

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IPC IPC(8): B23K9/235B23K9/18B23K9/095
Inventor 张东锡关一卓王茂威郑秋林
Owner CHINA GASOLINEEUM JILIN CHEM ENG & CONSTR
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