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A production process and flange technology, applied in flange connection, pipe/pipe joint/pipe fitting, through components, etc., can solve the problems of high labor cost, long milling time, material loss, etc., to improve the overall accuracy and use range. The effect of wide and yield improvement
Pending Publication Date: 2021-03-12
宜兴市联丰重工科技有限公司
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Abstract
Description
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Problems solved by technology
At present, in the manufacturing process of the flange, it is usually directly machined (lathe processing, milling machine processing, etc.) Very serious, accounting for 40%-50%
Method used
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Embodiment 1
[0019] A kind of novel flange production technique described in the present invention described in the present invention, it comprises the following steps,
[0020] (1) Send the raw materials into the primary smelting furnace for primary smelting. The initial smelting temperature is 1110°C, and the initial smelting is 60 minutes. When it reaches 23kPa, carry out oxygen blowing decarburization, adjust the vacuum degree to 140Pa, add a deoxidizer to the VOD ladle under vacuum conditions for deoxidation, and finally hang out the VOD ladle for pouring. The pouring temperature is 1300°C and the pouring speed is 29kg / s , the pouring time is 20s, and the billet is obtained;
[0021] (2) Forging the billet, the initial forging temperature is controlled at 1130°C, and the final forging temperature is controlled at 780°C. After forging, the billet is air-cooled to 570°C, then placed in a heating furnace and heated to 915°C, and then air-cooled to 450°C. Finally adopt water to cool to r...
Embodiment 2
[0032] A kind of novel flange production technique described in the present invention described in the present invention, it comprises the following steps,
[0033] (1) Send the raw materials into the primary smelting furnace for primary smelting. The initial smelting temperature is 1050°C, and the initial smelting is 60 minutes. When it reaches 22kPa, carry out oxygen blowing decarburization, adjust the vacuum degree to 130Pa, add a deoxidizer to the VOD ladle under vacuum conditions for deoxidation, and finally hang out the VOD ladle for pouring. The pouring temperature is 1250°C and the pouring speed is 24kg / s , the pouring time is 20s, and the billet is obtained;
[0034] (2) Forging the billet, the initial forging temperature is controlled at 1110°C, and the final forging temperature is controlled at 760°C. After forging, the billet is air-cooled to 540°C, then placed in a heating furnace and heated to 905°C, and then air-cooled to 440°C. Finally adopt water to cool to r...
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Abstract
The invention relates to a novel flange production process. The novel flange production process comprises the following steps of (1) feeding raw materials into a primary smelting furnace for primary smelting, discharging after primary smelting, hoisting a VOD steel ladle into a vacuum chamber, introducing bottom blowing argon, closing a cover, vacuumizing, adding a deoxidizing agent into the VOD steel ladle under a vacuum condition for deoxidizing, and finally hoisting out the VOD steel ladle for pouring; (2) forging a blank; (3) making the forged blank into a plate; (4) cutting the plate by adopting a laser cutting machine to manufacture 1/4 semi-finished flange sheets; (5) laying the four 1/4 semi-finished flange sheets on a mold of an integrated splicing and welding machine, and layingan auxiliary arc plate; (6) starting the integrated splicing and welding machine to complete the single-face welding work of a flange, and automatically withdrawing a gun; (7) laying the flange reversely to complete the welding work of the side, and automatically withdrawing the gun; (8) dismounting the flange, cutting off the auxiliary arc plate, and polishing; and (9) carrying out nondestructivetesting on the product. The novel flange production process has the advantages of process saving, less material consumption, cost saving, environmental friendliness and safety.
Description
technical field [0001] The invention belongs to the field of flange manufacture, and in particular relates to a flange preparation process. Background technique [0002] Flanges are important pipe connections and are widely used. At present, in the manufacturing process of the flange, it is usually directly machined (lathe processing, milling machine processing, etc.) Very serious, accounting for 40%-50%. Due to long-term deep processing, the residual stress of the product is high, and the hardness of the material is high, which directly affects the mechanical properties and performance of the material. Contents of the invention [0003] Purpose of the invention: The purpose of the invention is to overcome the deficiencies in the prior art and provide a new flange production process that saves procedures, uses less materials, saves costs, and is environmentally friendly and safe. [0004] Technical solution: In order to solve the above technical problems, a novel flange...
Claims
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Application Information
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