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Forging process for forming manhole cylinder

A barrel and process technology, which is applied in the forging process field of manhole barrel forming, can solve the problems of manhole barrel deformation, fracture, and waste, and achieve the goals of reducing waste, avoiding fracture and deformation, and improving hardness and toughness Effect

Pending Publication Date: 2022-07-22
WUXI PAIKE HEAVY CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a forging process for forming the manhole cylinder, so as to solve the problem of the large amount of waste generated during processing and the frequent deformation of the manhole cylinder during use in the prior art. or broken problems

Method used

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  • Forging process for forming manhole cylinder
  • Forging process for forming manhole cylinder
  • Forging process for forming manhole cylinder

Examples

Experimental program
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Effect test

no. 1 example

[0091] like figure 1 As shown, the forging process for forming the manhole cylinder in this embodiment includes the following steps:

[0092] The billet processing step: casting and cooling the raw material to form a steel ingot, cutting and sawing the riser; forging the steel ingot repeatedly, upsetting and drawing, and then punching to form a billet;

[0093] Forging material processing steps: Roughly process the billet to form a ring piece after rolling the ring; saw the ring piece into several arc-shaped forging materials, and machine through holes on the forging material;

[0094] In the billet processing step, the ingot forging processing step includes:

[0095] The first forging process: forging and heating the steel ingot; the subsequent steel ingot is upsetting, lengthening and pause upsetting in sequence; initial forging temperature: 1230 °C; final forging temperature: 850 °C;

[0096] The second forging process: forging and heating the ingot; post-ingot punching; ...

no. 2 example

[0113] like figure 1 As shown, the forging process for forming the manhole cylinder in this embodiment includes the following steps:

[0114] The billet processing step: casting and cooling the raw material to form a steel ingot, cutting and sawing the riser; forging the steel ingot repeatedly, upsetting and drawing, and then punching to form a billet;

[0115] Forging material processing steps: Roughly process the billet to form a ring piece after rolling the ring; saw the ring piece into several arc-shaped forging materials, and machine through holes on the forging material;

[0116] In the billet processing step, the ingot forging processing step includes:

[0117] The first forging process: forging and heating the steel ingot; the subsequent steel ingot is upsetting, lengthening and pause upsetting in sequence; initial forging temperature: 1250 °C; final forging temperature: 870 °C;

[0118] The second forging process: forging and heating the steel ingot; post-ingot punc...

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Abstract

The invention relates to a forging process for forming a manhole cylinder. The forging process is characterized by comprising the following steps: a blank treatment step; casting and cooling the raw materials to form steel ingots, and sawing risers; the steel ingot is forged, upset and drawn out repeatedly and then punched to form a blank; forging material treatment: performing ring rolling on the blank, and performing rough machining to form a ring piece; sawing the ring piece into a plurality of circular-arc-shaped forging materials, and machining through holes in the forging materials; the forging material is heated and then placed in a first bottom die, a first pressing die extrudes the forging material, and a semi-finished product is formed through flanging of the first bottom die; the semi-finished product is heated and then placed in a second bottom die, a second pressing die extrudes the semi-finished product for shaping, and a finished product is obtained after slow cooling. The problems that in an existing scheme, a large amount of waste materials are generated in machining, and a manhole cylinder body is deformed or fractured in the using process are solved.

Description

technical field [0001] The invention relates to the field of forging technology, in particular to a forging technology for forming a manhole cylinder. Background technique [0002] The manhole is an opening structure that is convenient for personnel to enter and exit for installation, maintenance and safety inspection. Manholes are often used in closed containers, pipeline construction and other fields. The traditional manhole cylinder processing process is to punch out a through hole on a cylindrical steel column, and then process the finished product through steps such as forging, stamping, and turning. Such a processing method results in a long processing time of the manhole cylinder, a large amount of waste generated during processing, and the manhole cylinder is often deformed or broken during subsequent use. How to solve this problem becomes crucial. SUMMARY OF THE INVENTION [0003] Aiming at the shortcomings of the above-mentioned prior art, the purpose of the p...

Claims

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Application Information

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IPC IPC(8): B23P15/00B21J5/00
CPCB23P15/00B21J5/002
Inventor 陆秦旭魏航郭亮蒋鑫
Owner WUXI PAIKE HEAVY CASTING & FORGING