CN113118709A - Flange machining method capable of improving mechanical performance of flange - Google Patents
Flange machining method capable of improving mechanical performance of flange Download PDFInfo
- Publication number
- CN113118709A CN113118709A CN202110345601.6A CN202110345601A CN113118709A CN 113118709 A CN113118709 A CN 113118709A CN 202110345601 A CN202110345601 A CN 202110345601A CN 113118709 A CN113118709 A CN 113118709A
- Authority
- CN
- China
- Prior art keywords
- flange
- round bar
- bar material
- forging
- along
- 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
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003754 machining Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000005242 forging Methods 0.000 claims abstract description 35
- 238000003672 processing method Methods 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000009713 electroplating Methods 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 13
- 239000002184 metal Substances 0.000 abstract description 13
- 230000007774 longterm Effects 0.000 abstract description 9
- 238000007789 sealing Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 238000009497 press forging Methods 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
Abstract
The invention belongs to the field of flanges, and particularly relates to a flange processing method capable of improving the mechanical property of a flange, which comprises the following steps: (1) selecting a proper round bar material according to the size of the flange, and adding the round bar material into die forging equipment for forging and forming to obtain a flange blank; (2) performing lathe machining and drilling machining on the flange blank obtained in the step (1); in the step (1), the direction of applying pressure to the round bar material in the forging forming process is along the radial direction of the round bar material. In the process of forging the round bar material into the flange blank, the invention applies pressure along the radial direction of the round bar material, but not applies pressure along the axial direction of the round bar in the traditional process, because the metal fibers in the round bar are basically along the axial direction, in the flange obtained by applying pressure to the round bar along the radial direction according to the invention, the metal fibers are basically parallel to the upper surface and the lower surface of the flange, and when the flange is stressed and bent, the metal fibers can play a long-term effective anti-deformation role, thereby ensuring the long-term sealing effect of the flange.
Description
Technical Field
The invention belongs to the field of flanges, and particularly relates to a flange processing method capable of improving the mechanical property of a flange.
Background
The flange connection is a sealing structure, has the advantages of simple structure, low cost, repeated disassembly and the like, and is widely applied to petrochemical equipment and pipelines. The flange is used as a sealing structure, the main failure mode is leakage, media in most devices or containers in the petrochemical industry are inflammable and explosive, safety accidents such as combustion and explosion are easily caused when leakage occurs, and the accidents bring economic loss to enterprises and threaten the life safety of the environment and people.
For the flange with the stepped hole, after the flange is installed on equipment such as a pipeline and the like, sealing is mainly realized by close fit of the step of the stepped hole and the pipeline and the like, so that the phenomenon that the flange is bent and deformed in the long-term use process is avoided, which is an important factor for ensuring the sealing performance, in other words, the deformation resistance of the flange in the long-term use process can be effectively improved by improving the mechanical system energy (mainly bending strength) of the flange, and the long-term sealing effect of the flange is further ensured.
The flange is usually formed by directly forging a round bar material, and then the final flange product is obtained by processes such as lathe processing, driller processing and the like. In the conventional processing method, when a round bar material is forged and formed, a pressure is applied in the axial direction of the round bar to plastically deform the round bar to obtain a desired shape and size. However, since the metal fibers in the round bar material are substantially along the axial direction of the round bar, the metal fibers existing in the flange obtained by press forging along the axial direction of the round bar are substantially distributed along the axial direction of the flange, and the content of the metal fibers distributed along the radial direction is very low, so that the mechanical system energy of the flange processed by the traditional method is relatively low.
Disclosure of Invention
In order to solve the problems, the invention discloses a flange processing method capable of improving the mechanical property of a flange, which is characterized in that in the process of forging a round bar material into a flange blank, the direction of applying pressure to the round bar material is along the radial direction of the round bar material, but not along the axial direction of the round bar in the traditional process, because metal fibers in the round bar material are basically along the axial direction of the round bar, in the flange obtained by performing pressure forging on the round bar along the radial direction (the direction vertical to the axial direction of the round bar), the metal fibers are basically distributed in parallel to the upper surface and the lower surface of the flange, and when the flange is bent under stress, the metal fibers can play a long-term effective anti-deformation effect, so that the long-term sealing effect of the flange is ensured.
In order to achieve the purpose, the invention adopts the following technical scheme:
a flange processing method capable of improving the mechanical property of a flange comprises the following steps:
(1) selecting a proper round bar material according to the size of the flange, and adding the round bar material into die forging equipment for forging and forming to obtain a flange blank;
(2) performing lathe machining and drilling machining on the flange blank obtained in the step (1);
in the step (1), the direction of applying pressure to the round bar material in the forging forming process is along the radial direction of the round bar material.
Preferably, the forging molding in the step (1) is performed by a hot die forging or warm die forging process.
Preferably, the round bar material in the step (1) is a steel material.
Preferably, the round bar material in the step (1) is carbon steel.
Preferably, the method for processing a flange capable of improving the mechanical properties of the flange further comprises the step (3): and (3) carrying out surface electroplating on the flange subjected to lathe machining and drilling machining in the step (2).
The invention has the following beneficial effects:
(1) in the process of forging the round bar material into the flange blank, the direction of applying pressure to the round bar material is along the radial direction of the round bar material, but not along the axial direction of the round bar in the traditional process, because the metal fibers in the round bar material are basically along the axial direction of the round bar, in the flange obtained by applying pressure to the round bar along the radial direction (the direction vertical to the axial direction of the round bar), the metal fibers are basically distributed in parallel to the upper surface and the lower surface of the flange, and when the flange is stressed and bent, the metal fibers can play a long-term effective anti-deformation role, so that the long-term sealing effect of the flange is ensured;
(2) the invention applies pressure to forge along the radial direction of the round bar, can also effectively avoid the occurrence of the situations of short pressing and breaking of metal fibers in the axial forging of the round bar in the traditional process, improves the mechanical property of the flange, and ensures that the flange has intentional deformation resistance;
(3) the bending strength of the flange prepared by the method is improved by more than 30 percent compared with the bending strength of the flange prepared by the traditional method.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a comparison of the forging direction of the present invention and the forging direction of the conventional process.
Detailed Description
The present invention will now be described in further detail with reference to examples.
The flange processing method capable of improving the mechanical property of the flange comprises the following steps:
(1) selecting a proper round bar material according to the size of the flange, and adding the round bar material into die forging equipment for forging and forming to obtain a flange blank;
(2) performing lathe machining and drilling machining on the flange blank obtained in the step (1);
(3) and (3) carrying out surface electroplating on the flange subjected to lathe machining and drilling machining in the step (2).
In the step (1), the direction of applying pressure to the round bar material in the forging forming process is along the radial direction of the round bar material.
The forging molding in the step (1) is carried out by a hot die forging or warm die forging process.
The round bar material in the step (1) is steel.
The round bar material in the step (1) is carbon steel.
Examples
(1) Selecting a 45-steel round bar with the diameter of 100mm and the length of 150mm, adding the round bar into die forging equipment for forging, wherein the initial stage temperature is 850-900 ℃, the terminal temperature is 750 ℃, and forging the round bar in the radial direction until a blank completely fills a die cavity to obtain a flange blank;
(2) placing the flange blank on a numerical control lathe, cutting a step hole, drilling an outer flange hole, and cleaning burrs by using a drill bit;
(3) and carrying out surface electroplating to obtain the finished flange.
Comparative example
(1) Selecting a 45-steel round bar with the diameter of 100mm and the length of 150mm, adding the round bar into die forging equipment for forging, wherein the initial stage temperature is 850-900 ℃, the terminal temperature is 750 ℃, and forging the round bar axially until a blank completely fills a die cavity to obtain a flange blank;
(2) placing the flange blank on a numerical control lathe, cutting a step hole, drilling an outer flange hole, and cleaning burrs by using a drill bit;
(3) and carrying out surface electroplating to obtain the finished flange.
The bending strength of the flange blanks prepared in the step (1) of the examples and the comparative example was measured. The flange blanks obtained in examples and comparative examples were cut perpendicularly to the direction of the flange blank to prepare test specimens having a circular cross section, the test specimens were mounted on a four-point bending test apparatus, a bending force was continuously applied to the test specimens until the test specimens were broken, the maximum bending force was read from a force measuring dial of a testing machine, and the bending strength of the test specimens was calculated according to the formula σ = Fl/2W (where σ is the bending strength, F is the bending force, l is the force arm, and W is the section modulus of the test specimens). The bending strength of the flange blanks of the examples was calculated to be 30% higher than the bending strength of the comparative flange blanks.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. A flange processing method capable of improving mechanical property of a flange is characterized in that: the method comprises the following steps:
(1) selecting a proper round bar material according to the size of the flange, and adding the round bar material into die forging equipment for forging and forming to obtain a flange blank;
(2) performing lathe machining and drilling machining on the flange blank obtained in the step (1);
in the step (1), the direction of applying pressure to the round bar material in the forging forming process is along the radial direction of the round bar material.
2. A flange processing method for improving mechanical properties of a flange according to claim 1, wherein: the forging molding in the step (1) is carried out by a hot die forging or warm die forging process.
3. A flange processing method for improving mechanical properties of a flange according to claim 1, wherein: the round bar material in the step (1) is steel.
4. A flange processing method for improving mechanical properties of a flange according to claim 1, wherein: the round bar material in the step (1) is carbon steel.
5. A flange processing method for improving mechanical properties of a flange according to claim 1, wherein: further comprising the step (3): and (3) carrying out surface electroplating on the flange subjected to lathe machining and drilling machining in the step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110345601.6A CN113118709A (en) | 2021-03-31 | 2021-03-31 | Flange machining method capable of improving mechanical performance of flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110345601.6A CN113118709A (en) | 2021-03-31 | 2021-03-31 | Flange machining method capable of improving mechanical performance of flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113118709A true CN113118709A (en) | 2021-07-16 |
Family
ID=76775063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110345601.6A Pending CN113118709A (en) | 2021-03-31 | 2021-03-31 | Flange machining method capable of improving mechanical performance of flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113118709A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081426A (en) * | 2007-06-14 | 2007-12-05 | 兰鹏光 | Flange of wind power generation tower barrel forging shaping process |
| CN101885028A (en) * | 2010-07-01 | 2010-11-17 | 宁波大学 | Roll forming method for high-neck flange |
| CN102728756A (en) * | 2012-06-27 | 2012-10-17 | 江苏金源锻造股份有限公司 | Wind power spindle flange upsetting process |
| CN104175063A (en) * | 2013-05-28 | 2014-12-03 | 陕西华威锻压有限公司 | All-fiber-texture large-size one-piece flange fan main shaft forging method |
| CN104726809A (en) * | 2015-02-06 | 2015-06-24 | 西安交通大学 | Radial forging type strain-induced semi-solid integral die forging process of blade |
| CN104826968A (en) * | 2015-05-07 | 2015-08-12 | 攀钢集团研究院有限公司 | GH4169 high-temperature alloy round rod finish forging method |
| CN104907475A (en) * | 2015-06-24 | 2015-09-16 | 南车戚墅堰机车车辆工艺研究所有限公司 | Integral forging mold of valve body with flanges, and forging method |
-
2021
- 2021-03-31 CN CN202110345601.6A patent/CN113118709A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081426A (en) * | 2007-06-14 | 2007-12-05 | 兰鹏光 | Flange of wind power generation tower barrel forging shaping process |
| CN101885028A (en) * | 2010-07-01 | 2010-11-17 | 宁波大学 | Roll forming method for high-neck flange |
| CN102728756A (en) * | 2012-06-27 | 2012-10-17 | 江苏金源锻造股份有限公司 | Wind power spindle flange upsetting process |
| CN104175063A (en) * | 2013-05-28 | 2014-12-03 | 陕西华威锻压有限公司 | All-fiber-texture large-size one-piece flange fan main shaft forging method |
| CN104726809A (en) * | 2015-02-06 | 2015-06-24 | 西安交通大学 | Radial forging type strain-induced semi-solid integral die forging process of blade |
| CN104826968A (en) * | 2015-05-07 | 2015-08-12 | 攀钢集团研究院有限公司 | GH4169 high-temperature alloy round rod finish forging method |
| CN104907475A (en) * | 2015-06-24 | 2015-09-16 | 南车戚墅堰机车车辆工艺研究所有限公司 | Integral forging mold of valve body with flanges, and forging method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101581200A (en) | 120 steel grade drill pipe and manufacturing process method thereof | |
| JPS61140694A (en) | Manufacture of pipe and boring-rod-unit used for petroleum industry and natural gas industry | |
| US4472207A (en) | Method for manufacturing blank material suitable for oil drilling non-magnetic stabilizer | |
| CN111054881A (en) | Manufacturing process of Christmas tree body forge piece for deep sea oil production equipment | |
| Decheng et al. | Defects caused in forming process of rotary forged parts and their preventive methods | |
| CN113118709A (en) | Flange machining method capable of improving mechanical performance of flange | |
| US6688148B1 (en) | Manufacturing process for making engine components of high carbon content steel using cold forming techniques | |
| CN101780487B (en) | Cold extrusion forming method of thin-walled inner cone splined hub | |
| KR20090034112A (en) | Manufacturing method of coupling bolt for gas turbine | |
| CN212615119U (en) | High-pressure oil pipe of track internal combustion locomotive | |
| CN114654168A (en) | Processing technology of high-lock nut for aerospace | |
| CN1151900C (en) | Technology for manufacturing elbow pipe with straight segment | |
| Chen et al. | Testing an injection forging process for the production of automotive fasteners | |
| Hu et al. | Process optimization for design of duplex universal joint fork using unequal thickness flash | |
| CN114310156B (en) | Die forging preparation method for titanium alloy drill rod joint | |
| KR100892159B1 (en) | Shank for core drill manufactured by cold forging process and Method thereof | |
| RU2775305C1 (en) | Method for manufacturing axisymmetric alloy steel housings | |
| US20220280991A1 (en) | A Method of Making a Fluid Conduit | |
| CN1210117C (en) | High-strength pear-shaped steel cable lasso | |
| CN216410624U (en) | Novel process test tool | |
| CN111748757A (en) | Process method for improving electrical conductivity and mechanical property of 7075 aluminum alloy | |
| RU2403117C2 (en) | Method of producing bimetal small-diametre adaptor by multi-stage forming | |
| USRE20690E (en) | Process of making dies | |
| Ma et al. | Experimental Investigation on the Pull-Out Strength of Flexibly Expanded Tube-to-Tubesheet Joints | |
| CN116493875A (en) | Processing method of upsetting type titanium alloy drill rod joint and titanium alloy |
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: 20210716 |