CN112475790A - Novel flange production process - Google Patents
Novel flange production process Download PDFInfo
- Publication number
- CN112475790A CN112475790A CN202011196362.4A CN202011196362A CN112475790A CN 112475790 A CN112475790 A CN 112475790A CN 202011196362 A CN202011196362 A CN 202011196362A CN 112475790 A CN112475790 A CN 112475790A
- Authority
- CN
- China
- Prior art keywords
- flange
- vod
- primary smelting
- laying
- steel ladle
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000003723 Smelting Methods 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000005242 forging Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000007664 blowing Methods 0.000 claims abstract description 9
- 229910052786 argon Inorganic materials 0.000 claims abstract description 5
- 238000003698 laser cutting Methods 0.000 claims abstract description 5
- 238000005498 polishing Methods 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 238000005261 decarburization Methods 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 238000009659 non-destructive testing Methods 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 9
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
Abstract
The invention relates to a novel flange production process, which comprises the steps of (1) sending raw materials into a primary smelting furnace for primary smelting, taking the raw materials out of the furnace after the primary smelting, hoisting a VOD steel ladle into a vacuum chamber, switching on bottom blowing argon to start cover closing and evacuation, adding a deoxidizing agent into the VOD steel ladle under the vacuum condition for deoxidation, and finally hoisting the VOD steel ladle out for pouring; (2) forging the blank; (3) manufacturing the forging material into a plate; (4) cutting the plate by a laser cutting machine to manufacture 1/4 semi-finished flange pieces; (5) laying four 1/4 semi-finished flange sheets on a die of an integrated splicing welding machine, and laying an auxiliary arc plate; (6) starting the integrated splicing welding machine, completing the single-side welding work of the flange, and automatically withdrawing the gun; (7) laying the reverse side of the flange to complete the welding work of the flange, and automatically withdrawing the gun; (8) disassembling the flange, cutting off the auxiliary arc plate, and polishing; (9) and carrying out nondestructive detection on the product. The invention saves working procedures, has less material consumption, saves cost, and is environment-friendly and safe.
Description
Technical Field
The invention belongs to the field of flange manufacturing, and particularly relates to a flange manufacturing process.
Background
The flange is an important pipeline connecting piece and is widely applied. At present, in the manufacturing process of a flange, a round rod is generally blanked and then directly machined (lathe machining, milling machine machining and the like), but the machining method has the disadvantages of long turning and milling time, high labor cost and very serious material loss, and accounts for 40% -50%. Due to long-time deep processing, the residual stress of the product is large, the hardness of the material is high, and the mechanical property and the service performance of the material are directly influenced.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to overcome the defects in the prior art and provide a novel flange production process which is less in working procedure, less in material consumption, cost-saving, environment-friendly and safe.
The technical scheme is as follows: in order to solve the technical problems, the novel flange production process comprises the following steps,
(1) sending the raw materials into a primary smelting furnace for primary smelting, wherein the primary smelting temperature is 1150 ℃ plus, the primary smelting is 60min, lifting a VOD steel ladle into a vacuum chamber after the primary smelting, switching on bottom argon blowing to start cover closing and vacuumizing, when the vacuum degree reaches 20-25kPa, carrying out oxygen blowing decarburization, adjusting the vacuum degree to be 125 plus 150Pa, adding a deoxidizer into the VOD steel ladle under the vacuum condition for deoxidation, finally lifting out the VOD steel ladle for casting, wherein the casting temperature is 1200 plus 1350 ℃, the casting speed is 20-30kg/s, and the casting time is 20s, so as to obtain a blank;
(2) forging the blank, controlling the initial forging temperature at 1100-;
(3) manufacturing the forging material into a plate;
(4) cutting a plate by using a laser cutting machine to manufacture 1/4 semi-finished flange pieces, so that 1/4 semi-finished flange pieces have open holes and smooth inner and outer circles;
(5) laying four 1/4 semi-finished flange sheets on a die of an integrated splicing welding machine, and laying an auxiliary arc plate;
(6) starting the integrated splicing welding machine, completing the single-side welding work of the flange, and automatically withdrawing the gun;
(7) laying the reverse side of the flange to complete the welding work of the flange, and automatically withdrawing the gun;
(8) disassembling the flange, cutting off the auxiliary arc plate, and polishing the excircle bulge of the flange;
(9) and carrying out nondestructive testing on the product, carrying out rust prevention treatment after the product is qualified, obtaining the required qualified product, and then packaging and warehousing the product.
Further, in the step (1), CaO is used as the deoxidizer.
Further, in the step (2), the mold comprises an annular base, and positioning pins are uniformly arranged on the upper part of the annular base.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the invention adopts a VOD smelting process for smelting, because the content of carbon and gas in the molten steel is easily reduced to a very low level under the vacuum condition, the quality of a finished product is ensured, the four-piece welding is adopted, the material yield of raw materials is greatly improved, the cost is saved, the accuracy of the position and the quantity of screw holes can be ensured to be 100 percent by adopting a flange group die, the processes of marking, positioning and the like of the prior flange are saved, the integral precision is effectively improved, the die comprises a full-circle flange, a base and a positioning pin, the manufacture is simple, the size is adjustable, the invention has safe and reliable operation and wide application range.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The novel flange production process comprises the following steps,
(1) sending the raw materials into a primary smelting furnace for primary smelting, wherein the primary smelting temperature is 1110 ℃, the primary smelting is 60min, taking out the raw materials after the primary smelting, hoisting a VOD steel ladle into a vacuum chamber, switching on bottom argon blowing, starting cover closing and vacuumizing, when the vacuum degree reaches 23kPa, carrying out oxygen blowing and decarburization, adjusting the vacuum degree to 140Pa, adding a deoxidizer into the VOD steel ladle for deoxidation under the vacuum condition, finally hoisting the VOD steel ladle out for casting, wherein the casting temperature is 1300 ℃, the casting speed is 29kg/s, and the casting time is 20s, thus obtaining a blank;
(2) forging the blank, controlling the initial forging temperature to be 1130 ℃, controlling the final forging temperature to be 780 ℃, cooling the forged blank to 570 ℃ by air, then placing the forged blank into a heating furnace to heat to 915 ℃, cooling to 450 ℃ by air, and finally cooling to room temperature by water;
(3) manufacturing the forging material into a plate;
(4) cutting a plate by using a laser cutting machine to manufacture 1/4 semi-finished flange pieces, so that 1/4 semi-finished flange pieces have open holes and smooth inner and outer circles;
(5) laying four 1/4 semi-finished flange sheets on a die of an integrated splicing welding machine, and laying an auxiliary arc plate;
(6) starting the integrated splicing welding machine, completing the single-side welding work of the flange, and automatically withdrawing the gun;
(7) laying the reverse side of the flange to complete the welding work of the flange, and automatically withdrawing the gun;
(8) disassembling the flange, cutting off the auxiliary arc plate, and polishing the excircle bulge of the flange;
(9) and carrying out nondestructive testing on the product, carrying out rust prevention treatment after the product is qualified, obtaining the required qualified product, and then packaging and warehousing the product.
In the step (1), CaO is used as the deoxidizer.
In the step (2), the die comprises an annular base, and positioning pins are uniformly arranged on the upper part of the annular base.
Example 2
The novel flange production process comprises the following steps,
(1) sending the raw materials into a primary smelting furnace for primary smelting, wherein the primary smelting temperature is 1050 ℃, the primary smelting is 60min, taking out the raw materials after the primary smelting, hoisting a VOD steel ladle into a vacuum chamber, switching on bottom argon blowing, starting cover closing and vacuumizing, when the vacuum degree reaches 22kPa, carrying out oxygen blowing and decarburization, adjusting the vacuum degree to 130Pa, adding a deoxidizer into the VOD steel ladle for deoxidation under the vacuum condition, finally hoisting the VOD steel ladle out for casting, wherein the casting temperature is 1250 ℃, the casting speed is 24kg/s, and the casting time is 20s, thus obtaining a blank;
(2) forging the blank, controlling the initial forging temperature at 1110 ℃ and the final forging temperature at 760 ℃, air-cooling the forged blank to 540 ℃, then placing the forged blank into a heating furnace to heat to 905 ℃, then air-cooling to 440 ℃, and finally water-cooling to room temperature;
(3) manufacturing the forging material into a plate;
(4) cutting a plate by using a laser cutting machine to manufacture 1/4 semi-finished flange pieces, so that 1/4 semi-finished flange pieces have open holes and smooth inner and outer circles;
(5) laying four 1/4 semi-finished flange sheets on a die of an integrated splicing welding machine, and laying an auxiliary arc plate;
(6) starting the integrated splicing welding machine, completing the single-side welding work of the flange, and automatically withdrawing the gun;
(7) laying the reverse side of the flange to complete the welding work of the flange, and automatically withdrawing the gun;
(8) disassembling the flange, cutting off the auxiliary arc plate, and polishing the excircle bulge of the flange;
(9) and carrying out nondestructive testing on the product, carrying out rust prevention treatment after the product is qualified, obtaining the required qualified product, and then packaging and warehousing the product.
In the step (1), CaO is used as the deoxidizer.
In the step (2), the die comprises an annular base, and positioning pins are uniformly arranged on the upper part of the annular base.
The invention adopts a VOD smelting process for smelting, because the content of carbon and gas in the molten steel is easily reduced to a very low level under the vacuum condition, the quality of a finished product is ensured, the four-piece welding is adopted, the material yield of raw materials is greatly improved, the cost is saved, the accuracy of the position and the quantity of screw holes can be ensured to be 100 percent by adopting a flange group die, the processes of marking, positioning and the like of the prior flange are saved, the integral precision is effectively improved, the die comprises a full-circle flange, a base and a positioning pin, the manufacture is simple, the size is adjustable, the invention has safe and reliable operation and wide application range.
The present invention provides a thought and a method, and a method and a way for implementing the technical scheme are many, the above is only a preferred embodiment of the present invention, it should be noted that, for a person skilled in the art, a plurality of improvements and modifications can be made without departing from the principle of the present invention, and the improvements and modifications should be regarded as the protection scope of the present invention, and each component not explicitly described in the embodiment can be implemented by the prior art.
Claims (3)
1. A novel flange production process is characterized in that: which comprises the following steps of,
(1) sending the raw materials into a primary smelting furnace for primary smelting, wherein the primary smelting temperature is 1150 ℃ plus, the primary smelting is 60min, lifting a VOD steel ladle into a vacuum chamber after the primary smelting, switching on bottom argon blowing to start cover closing and vacuumizing, when the vacuum degree reaches 20-25kPa, carrying out oxygen blowing decarburization, adjusting the vacuum degree to be 125 plus 150Pa, adding a deoxidizer into the VOD steel ladle under the vacuum condition for deoxidation, finally lifting out the VOD steel ladle for casting, wherein the casting temperature is 1200 plus 1350 ℃, the casting speed is 20-30kg/s, and the casting time is 20s, so as to obtain a blank;
(2) forging the blank, controlling the initial forging temperature at 1100-;
(3) manufacturing the forging material into a plate;
(4) cutting a plate by using a laser cutting machine to manufacture 1/4 semi-finished flange pieces, so that 1/4 semi-finished flange pieces have open holes and smooth inner and outer circles;
(5) laying four 1/4 semi-finished flange sheets on a die of an integrated splicing welding machine, and laying an auxiliary arc plate;
(6) starting the integrated splicing welding machine, completing the single-side welding work of the flange, and automatically withdrawing the gun;
(7) laying the reverse side of the flange to complete the welding work of the flange, and automatically withdrawing the gun;
(8) disassembling the flange, cutting off the auxiliary arc plate, and polishing the excircle bulge of the flange;
(9) and carrying out nondestructive testing on the product, carrying out rust prevention treatment after the product is qualified, obtaining the required qualified product, and then packaging and warehousing the product.
2. A novel flange production process according to claim 1, characterized in that: in the step (1), CaO is used as the deoxidizer.
3. A novel flange production process according to claim 1, characterized in that: in the step (2), the die comprises an annular base, and positioning pins are uniformly arranged on the upper part of the annular base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011196362.4A CN112475790A (en) | 2020-10-31 | 2020-10-31 | Novel flange production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011196362.4A CN112475790A (en) | 2020-10-31 | 2020-10-31 | Novel flange production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112475790A true CN112475790A (en) | 2021-03-12 |
Family
ID=74927981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011196362.4A Pending CN112475790A (en) | 2020-10-31 | 2020-10-31 | Novel flange production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112475790A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014030819A1 (en) * | 2012-08-23 | 2014-02-27 | Lee Chun-Hong | Method for manufacturing long-neck flange |
| KR20140116768A (en) * | 2013-03-25 | 2014-10-06 | 이용붕 | The Pipe Type Flange |
| CN104862615A (en) * | 2015-03-31 | 2015-08-26 | 无锡市华尔泰机械制造有限公司 | S31803 duplex stainless steel flange and production process thereof |
| CN105331901A (en) * | 2015-11-27 | 2016-02-17 | 无锡市华尔泰机械制造有限公司 | S22253 duplex stainless steel material flange and production process thereof |
| CN106271446A (en) * | 2016-08-30 | 2017-01-04 | 江苏协合新能源科技有限公司 | A kind of welding production technology of wind-power tower base flange |
| CN109483157A (en) * | 2017-09-13 | 2019-03-19 | 南京美克斯精密机械有限公司 | A kind of flange processing technology |
| CN110202327A (en) * | 2019-07-01 | 2019-09-06 | 宝成重工有限公司 | A kind of flange fabrication technology |
| CN110497158A (en) * | 2019-09-04 | 2019-11-26 | 南通泰胜蓝岛海洋工程有限公司 | A kind of manufacture craft of fragment pylon |
-
2020
- 2020-10-31 CN CN202011196362.4A patent/CN112475790A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014030819A1 (en) * | 2012-08-23 | 2014-02-27 | Lee Chun-Hong | Method for manufacturing long-neck flange |
| KR20140116768A (en) * | 2013-03-25 | 2014-10-06 | 이용붕 | The Pipe Type Flange |
| CN104862615A (en) * | 2015-03-31 | 2015-08-26 | 无锡市华尔泰机械制造有限公司 | S31803 duplex stainless steel flange and production process thereof |
| CN105331901A (en) * | 2015-11-27 | 2016-02-17 | 无锡市华尔泰机械制造有限公司 | S22253 duplex stainless steel material flange and production process thereof |
| CN106271446A (en) * | 2016-08-30 | 2017-01-04 | 江苏协合新能源科技有限公司 | A kind of welding production technology of wind-power tower base flange |
| CN109483157A (en) * | 2017-09-13 | 2019-03-19 | 南京美克斯精密机械有限公司 | A kind of flange processing technology |
| CN110202327A (en) * | 2019-07-01 | 2019-09-06 | 宝成重工有限公司 | A kind of flange fabrication technology |
| CN110497158A (en) * | 2019-09-04 | 2019-11-26 | 南通泰胜蓝岛海洋工程有限公司 | A kind of manufacture craft of fragment pylon |
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