CN108747225A - A kind of moulding process of welding neck flange - Google Patents
A kind of moulding process of welding neck flange Download PDFInfo
- Publication number
- CN108747225A CN108747225A CN201810689071.5A CN201810689071A CN108747225A CN 108747225 A CN108747225 A CN 108747225A CN 201810689071 A CN201810689071 A CN 201810689071A CN 108747225 A CN108747225 A CN 108747225A
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- CN
- China
- Prior art keywords
- flange
- steel pipe
- welding neck
- size
- product
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The present invention relates to a kind of moulding process of welding neck flange, and using long straight steel pipe as blank, the length of steel pipe is more than the length of straight pipe of welding neck flange product, and the caliber of steel pipe is consistent with the straight tube caliber of welding neck flange product；By steel pipe, from steel pipe both ends, extrusion forming goes out flange directly on cold-forming machine, and the size of the flange is not less than the flange size of welding neck flange product；Blank is heat-treated, being machined out to flange after cooling makes to reach target flange size.Flange and steel tubing portions are overall structure, avoid welding neck flange and the defects of excessively collect in the intermediate location stress of flange and straight tube, so as to improve bonding strength of the flange in engineer application, extend service life.
Description
Technical field
The invention belongs to steel pipe processing technique field more particularly to the moulding process of welding neck flange.
Background technology
Welding neck flange is mainly used for the continuous laying of large diameter pipeline, and the manufacture of existing welding neck flange mainly gives birth to casting
The flange flanging welded of production is to the both ends of pipeline, and this method is related to the production technology of flange complexity itself, due to flange and tube body
It is to be welded to connect relationship, welding edge turning is more sharp, and stress abnormality is concentrated, and product service life is short.
Invention content
The technical problem to be solved by the present invention is to provide a kind of moulding process of welding neck flange for the above-mentioned prior art,
It is directly integrally formed, flange is integrated with pipe, and welding process significantly extends the service life of welding neck flange.
Technical solution is used by the present invention solves the above problems：A kind of moulding process of welding neck flange, with the straight steel of length
For pipe as blank, the length of steel pipe is more than the length of straight pipe of welding neck flange product, and the caliber of steel pipe is straight with welding neck flange product
Pipe caliber is consistent；By steel pipe, from steel pipe both ends, extrusion forming goes out flange directly on cold-forming machine, and the size of the flange is not small
In the flange size of welding neck flange product；Blank is heat-treated, being machined out to flange after cooling makes to reach goal method
Blue size.
Specifically, the operation of the heat treatment is to be heated melt admittedly, carry out just steel alloy steel pipe to stainless-steel pipe
Fire and tempering are tempered carbon steel pipes.Quenched, elimination residual stress is carried out to the steel pipe of unlike material by heat treatment,
Change hardness, improves the toughness and processing performance of product.
The application includes cutting and polishing to the machining of flange, and flange is mainly grinding into the flange of predetermined size.
Compared with the prior art, the advantages of the present invention are as follows：A kind of moulding process of welding neck flange is provided, with long straight tube
For blank, flange at cold moudling eliminates the stress that cold moudling is formed by heat treatment, and improves toughness and the processing of blank
Performance, improves the obdurability of product, and makes flange and steel tubing portions performance uniform, avoids welding neck flange in the mistake of flange and straight tube
It crosses position stress excessively to concentrate, so as to improve bonding strength of the flange in engineer application.
Description of the drawings
Fig. 1 is the axial sectional view of welding neck flange in the embodiment of the present invention.
Specific implementation mode
Present invention is further described in detail with reference to embodiments.
Embodiment 1
Using long straight steel pipe as blank, the length of steel pipe is 180cm, and caliber (diameter) is 40cm, and material is 304 stainless
Steel, by steel pipe, from steel pipe both ends, extrusion forming goes out flange, the most short radius of flange to steel pipe central shaft directly on cold-forming machine
For 22cm, greatest radius 24cm；Blank is heat-treated, blank is sent into heat-treatment furnace, 10- is kept the temperature in 1050 DEG C
18min comes out of the stove and is air-cooled to room temperature, and being machined out to flange makes to reach target flange size, and the corresponding radius of flange is 20cm.
Embodiment 2
Using long straight steel pipe as blank, the length of steel pipe is 160cm, and caliber (diameter) is 50cm, and material is closed for 42CrMo
Jin Gang, by steel pipe, from steel pipe both ends, extrusion forming goes out flange directly on cold-forming machine, flange to steel pipe central shaft it is most short by half
Diameter is 24cm, greatest radius 25.8cm；Blank is heat-treated, blank is sent into heat-treatment furnace, at normalizing and tempering
Reason, normalizing temperature are 840-860 DEG C, are come out of the stove air-cooled, and temperature is 460-510 DEG C, comes out of the stove and is air-cooled to room temperature, are carried out to flange
Machining makes to reach target flange size, and the corresponding radius of flange is 24cm.
Embodiment 2
Using long straight steel pipe as blank, the length of steel pipe is 200cm, and caliber (diameter) is 50cm, and material is No. 45 steel (carbon
Steel), by steel pipe, from steel pipe both ends, extrusion forming goes out flange directly on cold-forming machine, and the radius of flange to steel pipe central shaft is
25-26cm；Blank is heat-treated, blank is sent into heat-treatment furnace, tempered processing, 600 DEG C of temperature, soaking time
30min eliminates stress, suitably reduces hardness, come out of the stove and be air-cooled to room temperature, being machined out to flange makes to reach target flange ruler
Very little, the corresponding radius of flange is 24cm.
The application devises the integrated molding welding neck flange of a welding, significantly shortens the production work of welding neck flange
Skill.Compared to welded type flanged pipe, the internal stress of gained welding neck flange product is low, and the service life is longer.
In addition to the implementation, all to use equivalent transformation or equivalent replacement the invention also includes there is an other embodiment
The technical solution that mode is formed should all be fallen within the scope of the hereto appended claims.
Claims (3)
1. a kind of moulding process of welding neck flange, it is characterised in that：Using long straight steel pipe as blank, the length of steel pipe is more than long-neck
The caliber of the length of straight pipe of flange product, steel pipe is consistent with the straight tube caliber of welding neck flange product；By steel pipe directly in cold forming
From steel pipe both ends, extrusion forming goes out flange on machine, and the size of the flange is not less than the flange size of welding neck flange product；To base
Material is heat-treated, and being machined out to flange after cooling makes to reach target flange size.
2. the moulding process of welding neck flange according to claim 1, it is characterised in that：The operation of the heat treatment is, right
Stainless-steel pipe is heated to be melted admittedly, is carried out normalizing and tempering to steel alloy steel pipe, is tempered to carbon steel pipes.
3. the moulding process of welding neck flange according to claim 1, it is characterised in that：The machining includes cutting and beats
Mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810689071.5A CN108747225A (en) | 2018-06-28 | 2018-06-28 | A kind of moulding process of welding neck flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810689071.5A CN108747225A (en) | 2018-06-28 | 2018-06-28 | A kind of moulding process of welding neck flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108747225A true CN108747225A (en) | 2018-11-06 |
Family
ID=63974531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810689071.5A Pending CN108747225A (en) | 2018-06-28 | 2018-06-28 | A kind of moulding process of welding neck flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108747225A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202327A (en) * | 2019-07-01 | 2019-09-06 | 宝成重工有限公司 | A kind of flange fabrication technology |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101011717A (en) * | 2006-11-30 | 2007-08-08 | 上海吴泾化工有限公司 | Flanging process of saddle type lining and die |
| CN101885028A (en) * | 2010-07-01 | 2010-11-17 | 宁波大学 | Roll forming method for high-neck flange |
| CN103998176A (en) * | 2012-08-23 | 2014-08-20 | 李春洪 | Method for manufacturing long-neck flange |
| CN104001752A (en) * | 2014-04-23 | 2014-08-27 | 浙江固的管业有限公司 | Production process for steel pipe fittings |
| CN104889681A (en) * | 2015-05-19 | 2015-09-09 | 宁波大学 | Method for processing welding neck flange |
| CN104862615B (en) * | 2015-03-31 | 2017-03-15 | 无锡市华尔泰机械制造有限公司 | A kind of production technology of S31803 two-phase stainless steel flange |
-
2018
- 2018-06-28 CN CN201810689071.5A patent/CN108747225A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101011717A (en) * | 2006-11-30 | 2007-08-08 | 上海吴泾化工有限公司 | Flanging process of saddle type lining and die |
| CN101885028A (en) * | 2010-07-01 | 2010-11-17 | 宁波大学 | Roll forming method for high-neck flange |
| CN103998176A (en) * | 2012-08-23 | 2014-08-20 | 李春洪 | Method for manufacturing long-neck flange |
| CN104001752A (en) * | 2014-04-23 | 2014-08-27 | 浙江固的管业有限公司 | Production process for steel pipe fittings |
| CN104862615B (en) * | 2015-03-31 | 2017-03-15 | 无锡市华尔泰机械制造有限公司 | A kind of production technology of S31803 two-phase stainless steel flange |
| CN104889681A (en) * | 2015-05-19 | 2015-09-09 | 宁波大学 | Method for processing welding neck flange |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202327A (en) * | 2019-07-01 | 2019-09-06 | 宝成重工有限公司 | A kind of flange fabrication technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181106 |
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| RJ01 | Rejection of invention patent application after publication |