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Production process of steel flange blank

A manufacturing process and flange technology, which is applied in the field of steel flange blank manufacturing process, can solve the problems of low manufacturing efficiency, huge investment, and high noise in the workplace environment, and achieve good organizational structure and low equipment requirements. The effect of high production efficiency

Inactive Publication Date: 2003-08-20
常熟市龙腾汽车弹簧钢板厂
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this manufacturing process also objectively has the following problems: 1. The manufacturing range of flange blanks is limited, that is, only flange blanks of medium and small sizes can be manufactured, and cannot be manufactured such as flanges with a diameter of 500mm and its size above 500mm. Blank, unless it is equipped with forging equipment of considerable specifications, and forging equipment suitable for manufacturing flange blanks of 500mm and above, it is not affordable for small and medium-sized enterprises because of the huge investment; 2. Forged flange blanks are due to Its microstructure is poor, and the comprehensive mechanical strength is difficult to be guaranteed; 3. Because it obtains the flange blank through die forging or sleeve forging, the manufacturing efficiency is low; 4. Because it is die forging or sleeve forging, it determines its The environment of the workplace is very harsh due to the loud noise

Method used

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  • Production process of steel flange blank
  • Production process of steel flange blank
  • Production process of steel flange blank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0017] Take the manufacture of PC500 prestressed pipe pile end plate flange blank as an example, the material is ZG200-400, the thickness obtained through (1) to (5) steps is 40mm, the outer diameter is 345mm, the inner diameter is 200mm, and the temperature is 550°C The casting slab 5 is sent to the conical roller rolling machine of 500 tons of pressure through the raceway, the rolling method and principle are the same as embodiment 1, only a pair of rolling machines 1 and 2 have a rotating speed of 55 rpm, and the rolling time is In 15 seconds, a prestressed pipe pile end plate flange blank 19 with a thickness, outer diameter, and inner diameter of 20mm, 500mm, and 300mm respectively is obtained. Example 3:

Embodiment 3

[0018] Take the manufacture of PC600 prestressed pipe pile end plate flange blank as an example, the material is ZG200-400, the thickness obtained through (1) to (5) steps is 40mm, the outer diameter is 408mm, the inner diameter is 240mm, and the temperature is 700°C The casting slab 5 is sent to the conical roller rolling machine of 350 tons of pressure through the raceway, the rolling method and principle are the same as embodiment 1, only a pair of rolling machines 1 and 2 have a rotating speed of 70 rpm, and the rolling time is In 18 seconds, a prestressed pipe pile end plate flange blank 19 with a thickness, outer diameter, and inner diameter of 20mm, 600mm, and 380mm respectively was obtained. Example 4:

Embodiment 4

[0019] Taking the flat flange blank used for manufacturing pipes as an example, the material is Q235 steel, and the mold is replaced with the mold for manufacturing flat flange blank. Send the slab 5 obtained through steps (1) to (5) with a thickness of 70mm, an outer diameter of 575mm, an inner diameter of 450mm, and a temperature of 1150°C through the raceway to a 200-ton conical roller compactor for rolling. The method and principle are the same as in Example 1, except that a pair of rolling rollers 1 and 2 are 100 rpm, and the rolling time is 20 seconds, thereby obtaining a pipeline with a thickness of 36mm, an external diameter of 860mm, and an internal diameter of 700mm Use flat flange blanks. Example 5:

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Abstract

The production process of steel flange blank includes the following steps: analyzing and blending the material including pig iron, waste steel and leftover and feeding the material into steel-making furnace; heating to 1500-1600 deg.c for 1-1.5 hr to obtain molten steel; pouring molten steel into casting ladle; preheating, painting and stoving cast mold before casting; casting, demolding and cleaning up cast blank; rolling with one pair of rolls in roller and cooling. The said process is suitable for large scale production of flange blank with compact structure and high strength.

Description

technical field [0001] The invention discloses a manufacturing process of a steel flange blank, in particular a manufacturing process of a flat flange, a butt welding flange, and a prestressed pipe pile end plate flange blank. Background technique [0002] As we all know, flanges are indispensable connectors on various pipelines such as water transportation, gas transportation, oil transportation, and chemical industry. In particular, steel flanges are more and more widely used because of their high strength, good weldability, high pressure resistance, impact resistance, and easy installation. The steel flange blanks produced by the prior art are generally made of Q235 steel and No. 20 steel. The process is: directly cut and blank the steel plate or forge the blank after cutting with the round steel, and then perform mechanical processing. Process manufacturing of steel flange blanks, due to low material utilization and long process lines, the cost of flanges is high. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/28
Inventor 季丙元潘瑞中
Owner 常熟市龙腾汽车弹簧钢板厂
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