Improved steel bar joint air pressure welding method

Abstract

The invention discloses an improved steel bar joint air pressure welding method. The method comprises the following steps that S1, steel bar prepared materials are cut; s2, inspection of welding equipment; s3, steel bar clamps and lengthened steel bars are installed, and a 3-5 mm gap is reserved between the two to-be-welded steel bars in the installation process; s4, heating the steel bar gap until the end of the steel bar is in a molten state, and quickly pressurizing when the end of the steel bar is convex; s5, the clamp is disassembled after natural cooling; and S6, joint welding quality inspection. According to the method, the construction process is simpler, and the welding quality and the welding speed of the steel bars are greatly improved. At present, a novel steel bar air pressure butt welding machine is very stable in performance, and various requirements of modern buildings for steel bar welding are well met.

Description

technical field [0001] The invention belongs to the technical field of construction methods, and in particular relates to an improved gas pressure welding method for steel bar joints. Background technique [0002] The traditional lap joint welding construction cost is high. Taking a sewage treatment plant project as an example, the construction and installation of steel bars amounted to 2,800 tons, including 1,800 tons of steel bars with a diameter of 14mm and above, accounting for more than 64% of the total amount of steel bars. There are about 80,000 steel bar joints, and the construction cost of using traditional lap joint welding is nearly 600,000 yuan. However, in the existing gas pressure welding, the high temperature flame generated by the combustion of oxygen and acetylene is used to heat the joints of the two steel bars to make them reach a basic molten state, and then the pressurizer applies appropriate pressure to weld the two steel bars together. , This technolo...

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Problems solved by technology

[0002] The construction cost of traditional lap joint welding is high. Taking a sewage treatment plant project as an example, the engineering volume of steel bars is 2,800 tons, of which 1,800 tons are steel bars with a diameter of 14mm and above, accounting for more than 64% of the total steel bar engineering volume. There are about 80,000 steel bar joints, and the construction cost of traditional lap joint welding is nearly 600,000 yuan

However, the existing gas pressure welding uses the high-temperature flame produced by the combustion of oxygen and acetylene to heat the joints of the two steel bars to make them reach a basic molten state, and then the pressurizer applies appropriate pressure to weld the two steel bars together. , this technology is easy to cause welding defects due to the uneven technical level of construction personnel

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