CN113172392A - Open type processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange - Google Patents
Open type processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange Download PDFInfo
- Publication number
- CN113172392A CN113172392A CN202110297445.0A CN202110297445A CN113172392A CN 113172392 A CN113172392 A CN 113172392A CN 202110297445 A CN202110297445 A CN 202110297445A CN 113172392 A CN113172392 A CN 113172392A
- Authority
- CN
- China
- Prior art keywords
- flange
- forging
- blank
- die cavity
- die
- 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
- 229910000570 Cupronickel Inorganic materials 0.000 title claims abstract description 27
- 239000000956 alloy Substances 0.000 title claims abstract description 26
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 25
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 238000005242 forging Methods 0.000 claims abstract description 54
- 238000003754 machining Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 7
- 239000003345 natural gas Substances 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 10
- 238000004080 punching Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005275 alloying Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
An open processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange comprises the following steps: step one, mounting a mould, namely selecting a matched open flange mould to be horizontally placed on an air forging hammer equipment operating platform, wherein the open flange mould is provided with a through hole type mould cavity; step two, preparing before forming to obtain a blank; step three, die forging forming; step four, performing heat treatment after forging; and step five, machining. The original processing mode of the copper-nickel alloy BFe30-1-1 flange is changed, an open flange forming die is designed, the utilization rate of raw materials of the copper-nickel alloy BFe30-1-1 flange product is greatly improved, and the material cost is reduced.
Description
Technical Field
The invention relates to the technical field of processing and manufacturing methods, in particular to an open processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange.
Background
The copper-nickel alloy has excellent corrosion resistance, marine organism pollution damage resistance and other comprehensive properties, and is widely adopted in chemical industry and ocean engineering in shipbuilding industry at home and abroad, wherein BFe30-1-1 is widely used for manufacturing pipeline accessories such as flange joints and the like as a high-alloying copper-nickel alloy material.
The invention patent CN201410613167.5 'die forging forming processing method for a high-neck flange', introduces a precision die forging processing method for a stainless steel flange, which reduces the labor intensity and forging efficiency of a forging worker by using a forging machine and an industrial robot. However, the patent refers to the forming method and the forming die for the marine copper-nickel alloy BFe30-1-1 flange with medium and small specifications and special purposes. At present, the flange of the BFe30-1-1 with the medium and small specification in China mostly adopts a machining process after forging, and the specific process is to forge a flange bar blank with the corresponding specification according to the external dimension of the flange and then machine the flange bar blank; the flange is formed by machining the bar blank, the material utilization rate is low, and the production cost is high. In order to meet the production requirements, an advanced forming method is urgently needed to improve the production efficiency and reduce the cost.
Disclosure of Invention
In order to solve the technical problems, the invention provides an open type processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange, changes the original processing mode of the copper-nickel alloy BFe30-1-1 flange, designs an open type flange forming die, greatly improves the utilization rate of the raw materials of the copper-nickel alloy BFe30-1-1 flange product, and reduces the material cost.
In order to realize the technical purpose, the adopted technical scheme is as follows: an open processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange comprises the following steps:
step one, installing a die
According to the net size of the flange and the machining allowance, selecting a matched open flange die to be horizontally placed on an air forging hammer device operation platform, wherein the open flange die is provided with a through hole type die cavity, the die cavity consists of an upper die cavity and a lower die cavity which are communicated, the upper die cavity and the lower die cavity are both annular, and the size of the upper die cavity is larger than that of the lower die cavity;
step two, preparation before forming
Adding machining allowance according to the net size of the flange to convert the volume of a required material section, selecting a copper-nickel alloy BFe30-1-1 round ingot or bar, cutting the corresponding material section on a sawing machine according to the length and weight corresponding to the volume of the required material section, and heating the material section at 980 +/-10 ℃ to obtain a blank;
step three, die forging forming
Forging the heated blank into a round cake shape matched with the upper die cavity in a free forging mode, then placing the round cake shape into an open die cavity, performing die forging by using an air forging hammer, and forging the blank into a lower die cavity, wherein the forging ratio is not less than 3; after the die forging is finished, turning over the die on an air forging hammer to punch a hole by using a punch, turning over the die again, blanking on the air forging hammer by using the punch, leveling the upper plane and the lower plane on the air forging hammer by using a hammer head after the blank is punched and blanked, and withdrawing the flange blank from the die cavity by turning over on a press by using special tools after the leveling is finished;
step four, heat treatment after forging
Carrying out heat treatment on the forged blank, wherein the heating annealing temperature of an electric furnace or a natural gas furnace is 650 +/-10 ℃, keeping the temperature for 1-2 hours, then discharging the blank out of the furnace and air cooling the blank;
step five, machining
And machining the blank subjected to the heat treatment according to the technical requirements on size and surface roughness to obtain the flange pipe fitting.
Heating in an electric furnace or a natural gas furnace, or charging in a warm state or heating along with the furnace, wherein when the charging in the warm state is adopted, the heat preservation time of the blank is not less than 1 hour; when the temperature is raised along with the furnace, the blank heat preservation time is 30-45 minutes.
The invention has the beneficial effects that:
by adopting the open type copper-nickel alloy BFe30-1-1 flange forming method, the flange is machined after die forging forming instead of bar blank machining, and due to the limiting effect of a die cavity of a forging die, the die forging formed flange is beneficial to regular filling and flowing of the flange blank in the die cavity and more reasonable distribution of the microstructure of a forge piece formed by a forging flow line; meanwhile, the flange produced by adopting open die forging has high dimensional precision and small machining allowance.
According to the open type copper-nickel alloy BFe30-1-1 flange forming method, machining of a flange is changed from rod blank machining into die forging forming in an open type die and then machining is carried out, the used raw materials are greatly reduced, the flange is manufactured by DN 20-DN 125 flange in Q/725-1123-2000-doped standard, the single piece blanking specification is reduced, and the utilization rate of the raw materials is improved to 45-52%.
Drawings
FIG. 1 is a schematic structural diagram of a copper-nickel alloy BFe30-1-1 flange product
FIG. 2 is a schematic structural view of an open flange mold of the present invention;
FIG. 3 is a schematic view of the punch of the present invention;
FIG. 4 is a schematic view of the placement of the blank into the cavity of the present invention;
FIG. 5 is a schematic view of an open die forging blank according to the present invention;
FIG. 6 is a schematic view of an open die punch of the present invention;
FIG. 7 is a schematic view of the open die punching and blanking of the present invention;
fig. 8 is a schematic diagram of the reshaping according to the present invention.
In the figure: 1. an upper die cavity, 2 and a lower die cavity.
Detailed Description
The schematic diagram of the copper-nickel alloy BFe30-1-1 flange product is shown in figure 1.
The invention is suitable for processing and manufacturing BFe30-1-1 flanges with specifications of DN 20-DN 125. The open flange forming die designed by the invention is shown in figures 2-3.
The molding method of the open type copper-nickel alloy BFe30-1-1 flange molding die is as follows:
(1) die mounting
According to the net size of a flange to be manufactured and machining allowance, a matched open flange die is selected to be horizontally placed on an operation platform of the air forging hammer device, the open flange die is provided with a through hole type die cavity, the die cavity is composed of an upper die cavity and a lower die cavity which are communicated, the upper die cavity and the lower die cavity are both annular, and the size of the upper die cavity is larger than that of the lower die cavity.
The total depth of the die cavity is the total height of the flange plus the machining allowance, the diameter of the upper die cavity is the outer diameter of the flange plus the machining allowance, the diameter of the lower die cavity is the diameter of the neck of the flange plus the machining allowance, the depth of the upper die cavity is larger than the thickness of the flange plate, and the depth of the lower die cavity is larger than the thickness of the neck of the flange plate.
(2) Preparation before forming
The method comprises the steps of converting the volume of a required material section according to the net size of a flange to be manufactured and machining allowance, selecting a copper-nickel alloy BFe30-1-1 round ingot or bar, cutting the corresponding material section on a sawing machine according to the length and the weight corresponding to the volume of the required material section, wherein flanges of various specifications correspond to a certain size and weight to be used as blanks of a formed copper-nickel alloy BFe30-1-1 flange pipe fitting, the specifications of the flanges which can be manufactured by the method are DN 20-DN 125, and the corresponding relation between the sizes of the blanks and the formed flanges is shown in Table 1. Heating the lower blank by an electric furnace or a natural gas furnace at 980 +/-10 ℃. The blank can be charged into the furnace at a warm temperature or heated along with the furnace, and when the blank is charged into the furnace at the warm temperature, the heat preservation time of the blank is not less than 1 hour; when the temperature is raised along with the furnace, the blank heat preservation time is 30-45 minutes.
TABLE 1 comparison table of blank size and flange nominal size
(3) Die forging forming
The heated flange blank is forged into a round cake shape matched with the size of the die cavity on the open die in a free forging mode, and then the round cake shape is placed into the die cavity of the open die, and the die forging process is shown in figures 4 to 7.
After the billet is placed in the open die, the die forging is performed by hammering with an air hammer, and after several hammering, the die forging is performed as shown in fig. 5. And in the forming process, the worker operates according to experience under the condition of ensuring that the forging ratio is not less than 3 according to the size of the blank and the size of the forging die.
After swaging is completed, the die is turned over on an air hammer to punch holes with a punch, as shown in fig. 6.
The die is again inverted and the blank is dropped on the air hammer using the punch as shown in fig. 7.
After the blank is punched and blanked, the upper and lower planes are flattened on an air hammer by means of a hammer head, as shown in fig. 8. The sizes of the flange punching core rods with different specifications are different, and the requirement that after a punch punches, the inner diameter of a blank is the inner diameter of the flange minus the machining allowance, the diameter of the large end of a punching head for punching II-type DN80 is phi 85, and the diameter of the small end of the punching head for punching the II-type DN80 is phi 78 and the height of the punching head is 65 is met.
(4) Heat treatment after forging
And (3) carrying out heat treatment on the forged blank, wherein the heating annealing temperature of an electric furnace or a natural gas furnace is 650 +/-10 ℃, keeping the temperature for 1-2 hours, then discharging the blank from the furnace and carrying out air cooling, and the optimal heat preservation time is 1.5 hours.
(5) And machining
And machining the die forging formed blank according to the size and the surface roughness of the technical requirement to form the flange pipe fitting meeting the requirement.
Example 1
The invention is applied to the II-type DN80 copper-nickel alloy BFe30-1-1 flange in Q/725-1123-2000. The die forging forming is carried out by adopting an open flange forming die, the blanking specification of a single flange is changed from phi 200 x 46mm to phi 100 x 122mm, the weight of the single flange is reduced from 12.86kg to 8.5kg, and the utilization rate of raw materials is improved to 46.2% from the previous 30.5%.
Example 2
The invention is applied to the III-type DN100 copper-nickel alloy BFe30-1-1 flange in Q/725-1123-2000.
The copper-nickel alloy BFe30-1-1 flange is formed by die forging through an open flange forming die, the blanking specification of a single piece is changed from phi 255 x 47mm to phi 100 x 172mm, the weight of the single piece is reduced from 21.35kg to 12.02kg, the blanking weight is reduced by 43.7%, and the utilization rate of raw materials is improved to 50% from the previous 28.1%.
Claims (2)
1. An open processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange is characterized by comprising the following steps:
step one, installing a die
According to the net size of a flange to be manufactured and machining allowance, selecting a matched open flange die to be horizontally placed on an air forging hammer device operation platform, wherein the open flange die is provided with a through hole type die cavity, the die cavity consists of an upper die cavity and a lower die cavity which are communicated, the upper die cavity and the lower die cavity are both annular, and the size of the upper die cavity is larger than that of the lower die cavity;
step two, preparation before forming
Converting the volume of a required material section according to the net size of a flange to be manufactured and machining allowance, selecting a copper-nickel alloy BFe30-1-1 round ingot or bar, cutting a corresponding material section on a sawing machine according to the length and weight corresponding to the volume of the required material section, and heating the material section at 980 +/-10 ℃ to obtain a blank;
step three, die forging forming
Forging the heated blank into a round cake shape matched with the upper die cavity in a free forging mode, then placing the round cake shape into an open die cavity, performing die forging by using an air forging hammer, and forging the blank into a lower die cavity, wherein the forging ratio is not less than 3; after the die forging is finished, turning over the die on an air forging hammer to punch a hole by using a punch, turning over the die again, blanking on the air forging hammer by using the punch, leveling the upper plane and the lower plane on the air forging hammer by using a hammer head after the blank is punched and blanked, and withdrawing the flange blank from the die cavity by turning over on a press by using special tools after the leveling is finished;
step four, heat treatment after forging
Carrying out heat treatment on the forged blank, wherein the heating annealing temperature of an electric furnace or a natural gas furnace is 650 +/-10 ℃, keeping the temperature for 1-2 hours, then discharging the blank out of the furnace and air cooling the blank;
step five, machining
And machining the blank subjected to the heat treatment according to the technical requirements on size and surface roughness to obtain the flange pipe fitting.
2. The open processing method of DN 20-DN 125 cupronickel BFe30-1-1 flange as claimed in claim 1, characterized in that: heating in an electric furnace or a natural gas furnace, or charging in a warm state or heating along with the furnace, wherein when the charging in the warm state is adopted, the heat preservation time of the blank is not less than 1 hour; when the temperature is raised along with the furnace, the blank heat preservation time is 30-45 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110297445.0A CN113172392A (en) | 2021-03-19 | 2021-03-19 | Open type processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110297445.0A CN113172392A (en) | 2021-03-19 | 2021-03-19 | Open type processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113172392A true CN113172392A (en) | 2021-07-27 |
Family
ID=76922157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110297445.0A Pending CN113172392A (en) | 2021-03-19 | 2021-03-19 | Open type processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113172392A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114589280A (en) * | 2022-04-19 | 2022-06-07 | 无锡派克新材料科技股份有限公司 | High-temperature antioxidant alloy die forging die and die forging method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009039750A (en) * | 2007-08-09 | 2009-02-26 | Okita Tekkosho:Kk | Method for forging short cylindrical part with flange or the like |
| KR101243436B1 (en) * | 2012-11-19 | 2013-03-13 | 삼양금속공업 주식회사 | Cuni 90/10 flange and its production method using forge |
| CN104550595A (en) * | 2015-01-14 | 2015-04-29 | 重庆焱炼重型机械设备股份有限公司 | Bush forging technology |
| CN104786021A (en) * | 2015-04-09 | 2015-07-22 | 无锡易通精密机械股份有限公司 | Bearing ring forging technology |
| CN105499928A (en) * | 2015-12-29 | 2016-04-20 | 江阴市恒润环锻有限公司 | Flange machining method |
| CN110355311A (en) * | 2019-06-27 | 2019-10-22 | 中信重工机械股份有限公司 | A kind of thin-walled band step flange open die forging forming method |
| CN111069519A (en) * | 2019-12-27 | 2020-04-28 | 安徽宝泰特种材料有限公司 | Method for manufacturing nickel and nickel alloy welding neck flange |
| CN111618529A (en) * | 2020-04-23 | 2020-09-04 | 陕西斯瑞新材料股份有限公司 | Manufacturing method of CuNi90/10 alloy socket welding flange |
| CN112475203A (en) * | 2020-10-26 | 2021-03-12 | 伊莱特能源装备股份有限公司 | Process for forging and forming welding neck flange for pipeline connection |
-
2021
- 2021-03-19 CN CN202110297445.0A patent/CN113172392A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009039750A (en) * | 2007-08-09 | 2009-02-26 | Okita Tekkosho:Kk | Method for forging short cylindrical part with flange or the like |
| KR101243436B1 (en) * | 2012-11-19 | 2013-03-13 | 삼양금속공업 주식회사 | Cuni 90/10 flange and its production method using forge |
| CN104550595A (en) * | 2015-01-14 | 2015-04-29 | 重庆焱炼重型机械设备股份有限公司 | Bush forging technology |
| CN104786021A (en) * | 2015-04-09 | 2015-07-22 | 无锡易通精密机械股份有限公司 | Bearing ring forging technology |
| CN105499928A (en) * | 2015-12-29 | 2016-04-20 | 江阴市恒润环锻有限公司 | Flange machining method |
| CN110355311A (en) * | 2019-06-27 | 2019-10-22 | 中信重工机械股份有限公司 | A kind of thin-walled band step flange open die forging forming method |
| CN111069519A (en) * | 2019-12-27 | 2020-04-28 | 安徽宝泰特种材料有限公司 | Method for manufacturing nickel and nickel alloy welding neck flange |
| CN111618529A (en) * | 2020-04-23 | 2020-09-04 | 陕西斯瑞新材料股份有限公司 | Manufacturing method of CuNi90/10 alloy socket welding flange |
| CN112475203A (en) * | 2020-10-26 | 2021-03-12 | 伊莱特能源装备股份有限公司 | Process for forging and forming welding neck flange for pipeline connection |
Non-Patent Citations (1)
| Title |
|---|
| 杨文魁: "单凸肩有孔法兰类锻件合理锻造方法", 《锻压机械》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114589280A (en) * | 2022-04-19 | 2022-06-07 | 无锡派克新材料科技股份有限公司 | High-temperature antioxidant alloy die forging die and die forging method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102350615B (en) | Shunt blocking forming method for star-shaped sleeve | |
| CN101695739B (en) | Forging process of large tee and large skew tee | |
| CN107252866B (en) | The multiple protrusion ozzle large-sized end enclosure forging integral forging and forming methods of nuclear reactor band | |
| CN105252230B (en) | Machining process for inclined tee | |
| CN108421951B (en) | EMU driving device wheel hub forging production technique | |
| CN107186139A (en) | The H profile steel manufacture method of nuclear fusion stack magnet support | |
| CN113172392A (en) | Open type processing method of DN 20-DN 125 copper-nickel alloy BFe30-1-1 flange | |
| CN104907472A (en) | Forging forming method for high temperature alloy frame-shaped piece | |
| CN111069519A (en) | Method for manufacturing nickel and nickel alloy welding neck flange | |
| CN210387405U (en) | Tool die for hot forging and cold forging composite distribution plastic forming | |
| CN110773691B (en) | Processing method of thin-wall aluminum alloy forging | |
| CN109663875B (en) | Forging process for die pressing groove of groove ring | |
| CN113182470A (en) | Near-net forming manufacturing process for hundred-ton-grade special-shaped cross-section ring forging | |
| CN101862949A (en) | Backward extrusion forging method | |
| CN109570432B (en) | Aluminum alloy forged ring manufacturing method based on shearing die for punching | |
| CN115351222A (en) | Integral forging forming method of large aluminum alloy thick-wall square ring forging | |
| CN110814245B (en) | Forging method of aluminum alloy forging | |
| CN111673022B (en) | Copper-nickel alloy flange rolling forming method | |
| CN109807574B (en) | Manufacturing process of combined die | |
| CN210817239U (en) | Corrugated ring forming die for nuclear power reactor internals | |
| CN114043166A (en) | Manufacturing method of nickel-based superalloy asymmetric special-shaped ring forging | |
| CN210547758U (en) | Special forging and pressing mould for cylinder barrel in coal mine hydraulic support | |
| CN108971400B (en) | Method for producing titanium alloy special-shaped forge piece by using free forging equipment | |
| CN112719791A (en) | Method for manufacturing titanium and titanium alloy flange | |
| CN101745557A (en) | Extrusion manufacturing technology of large-caliber reducing joint high-pressure pipe fitting with high steel grade |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210727 |