CN113996740A - Train bearing saddle forging forming method - Google Patents
Train bearing saddle forging forming method Download PDFInfo
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- CN113996740A CN113996740A CN202111302247.5A CN202111302247A CN113996740A CN 113996740 A CN113996740 A CN 113996740A CN 202111302247 A CN202111302247 A CN 202111302247A CN 113996740 A CN113996740 A CN 113996740A
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- China
- Prior art keywords
- forging
- heat preservation
- temperature
- blank
- preservation time
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/04—Shaping in the rough solely by forging or pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention relates to a forging forming method, in particular to a train bearing saddle forging forming method. The technical scheme of the invention is as follows: the method comprises two procedures of pre-forging and finish forging. The specific process comprises the following steps: (1) designing the shape and size of the blank; (2) preheating the blank; (3) and forging the blank. The invention provides a forging forming method of a train bearing saddle, which adopts two procedures of pre-forging and final forging to produce the bearing saddle forging, can ensure the quality of the bearing saddle forging, reduce the production period of the bearing saddle, prolong the service life of bearing saddle parts and save the production cost.
Description
Technical Field
The invention relates to a forging forming method, in particular to a forging forming method of a train carrying saddle.
Background
The train bearing saddle is an important part for ensuring the stable running of a train, bears the alternating load effects of tension, compression, impact, bending and the like in the running process of the train, and has very bad working environment.
The current processing mode of the train bearing saddle still mainly adopts casting, but the limitation of casting process and artificial reasons result in that the forming precision of the cast bearing saddle is low, the production period is long, and the subsequent processing is complicated.
At present, the forging production of the bearing adapter can be realized, but the shape and the size of the blank are reasonably designed, so that the production period is shortened, and the forming quality of a forged piece is ensured.
Disclosure of Invention
The invention mainly provides a method for forging and forming a train bearing saddle, which adopts two procedures of pre-forging and final forging to produce a bearing saddle forging, can shorten the production period of the forging and reduce the production cost, and adopts the following technical scheme.
A forging forming method of a train carrying saddle comprises two procedures of pre-forging and finish forging, wherein the pre-forging procedure comprises the following steps:
designing the shape and size of the blank: according to the shape and the size of a train carrying saddle, determining to adopt a cuboid blank, wherein the specific size is 150mm multiplied by 180 mm;
polishing the blank: removing the surface defects of the blank and ensuring that the polishing width-depth ratio is more than or equal to 10;
preheating and insulating blanks: preheating the blank by using a box type resistance furnace, wherein the heating temperature is 1220 +/-20 ℃, and the total heating time is not less than 1.2 h; heating the resistance furnace to a specified temperature, then loading the heated blank into the resistance furnace, calculating the heat preservation time after the furnace temperature is heated to the specified temperature, wherein the heat preservation time of the forge piece at the forging temperature can be prolonged under some abnormal conditions, and the longest heat preservation time cannot exceed 2 hours; when the steel billet reaches the maximum heat preservation time at the forging temperature and can not be taken out of the furnace for forging due to the maximum heat preservation time, the furnace temperature can be reduced to 1050 ℃ for heat preservation within 6h, and the heat preservation time when the steel billet is heated to the forging temperature can be reduced by half;
forging a blank: the preforging process forges the square blank into a preforging piece which is in accordance with the shape of the finish forging part;
and after the pre-forging process, performing a finish forging process to forge a finished product of the train bearing saddle.
The train carrying saddle forging forming method comprises the following steps of:
air cooling the forged piece forged in the pre-forging process, and performing shot blasting on the surface of the forged piece;
polishing the forged piece forged in the pre-forging process, removing the surface defects of the pre-forged piece and ensuring that the polishing width-depth ratio is more than or equal to 10;
the box type resistance furnace is adopted to preheat the pre-forged piece again, the heating temperature is 1220 +/-20 ℃, the total heating time is not less than 0.8h, the resistance furnace is filled with a blank after being heated to the specified temperature, the heat preservation time is calculated after the furnace temperature is raised to the specified temperature, the heat preservation time of the forged piece at the forging temperature can be prolonged under certain abnormal conditions, and the longest heat preservation time cannot exceed 1 h; when the steel billet reaches the maximum heat preservation time at the forging temperature and can not be taken out of the furnace for forging due to the maximum heat preservation time, the furnace temperature can be reduced to 1050 ℃ for heat preservation within 6h, and the heat preservation time when the steel billet is heated to the forging temperature can be reduced by half;
performing finish forging operation on the pre-forged piece to forge a qualified bearing saddle forged piece, wherein the lowest temperature of a forming part is 750 ℃;
and air-cooling the forged piece after finish forging to room temperature, then carrying out shot blasting treatment on the forged piece, and marking the forged piece.
Drawings
Fig. 1 is a front view of a blank.
Fig. 2 is a top view of the blank.
Fig. 3 is an isometric view of a blank.
FIG. 4 is a top view of a pre-forging.
FIG. 5 is an isometric view of a pre-forging.
FIG. 6 is a top view of the final forging.
FIG. 7 is an isometric view of a final forging.
FIG. 8 is a schematic diagram of the preheating curve of the pre-forging process.
FIG. 9 is a schematic view showing a preheating curve in the finish forging step.
Detailed Description
As shown in fig. 1-7, a train carrying saddle forging shaping method comprises two procedures of pre-forging and finish forging, wherein the pre-forging procedure comprises the following steps:
according to the shape and the size of a train carrying saddle, the shape and the size of a blank are designed, and a cuboid blank with the length, the width and the height of 150mm multiplied by 180mm is selected;
the integral bearing saddle part is U-shaped, and firstly, a cuboid blank is forged into a pre-forged piece which is in accordance with the shape of a finish forged piece through a pre-forging procedure;
before the pre-forging process, a resistance furnace is adopted to preheat the blank, the heating temperature is 1220 +/-20 ℃, and the heating time is not less than 1.2 h;
heating to a specified temperature, then preserving heat for the blank, wherein the longest heat preservation time is 2h, if the steel billet reaches the maximum heat preservation time at the forging temperature and can not be taken out of the furnace for forging, reducing the furnace temperature to 1050 ℃ for heat preservation within 6h, and reducing the heat preservation time by half when the steel billet is heated to the forging temperature;
and (3) the lowest temperature of the forming part of the forged piece forged in the pre-forging process is 750 ℃, and the forged piece is cooled to room temperature in air.
The finish forging process comprises the following steps:
performing shot blasting and polishing treatment on the pre-forged piece, removing surface defects of the pre-forged piece, and ensuring that the polishing ratio is more than or equal to 10;
preheating the pre-forging piece again, wherein the heating temperature is 1220 +/-20 ℃, and the heating time is more than or equal to 0.8 h;
heating the resistance furnace to a specified temperature, then loading the heated blank into the resistance furnace, calculating the heat preservation time after the furnace temperature is heated to the specified temperature, wherein the heat preservation time of the forge piece at the forging temperature can be prolonged under some abnormal conditions, and the longest heat preservation time cannot exceed 1 h; when the steel billet reaches the maximum heat preservation time at the forging temperature and can not be taken out of the furnace for forging due to the maximum heat preservation time, the furnace temperature can be reduced to 1050 ℃ for heat preservation within 6h, and the heat preservation time when the steel billet is heated to the forging temperature can be reduced by half;
forging the heated pre-forging piece, and forging a qualified bearing saddle forging piece through a finish forging process, wherein the lowest temperature of a forming part is 750 ℃;
and air-cooling the forged piece after finish forging to room temperature, then carrying out shot blasting treatment on the forged piece, and marking the forged piece.
Claims (8)
1. A train carrying saddle forging shaping method is characterized by comprising two procedures of pre-forging and finish forging, wherein the pre-forging procedure comprises the following steps:
designing the shape and size of a blank, and determining to adopt a cuboid blank according to the shape and size of a train carrying saddle, wherein the specific size is 150mm multiplied by 180 mm;
and (3) polishing the blank, removing the surface defects of the blank and ensuring that the polishing width-depth ratio is more than or equal to 10.
2. Preheating and heat-preserving the blank, and preheating the blank by adopting a box-type resistance furnace at the heating temperature of 1220 +/-20 ℃ for not less than 1.2 h; the circuit is heated to a specified temperature and then is filled into a blank, the furnace temperature is raised to the specified temperature, then the heat preservation time is calculated, the heat preservation time of the forge piece at the forging temperature can be prolonged under certain abnormal conditions, and the longest heat preservation time cannot exceed 2 hours; when the steel billet reaches the maximum heat preservation time at the forging temperature and can not be taken out of the furnace for forging due to the maximum heat preservation time, the furnace temperature can be reduced to 1000-1050 ℃ for heat preservation within 6h, and the heat preservation time when the steel billet is heated to the forging temperature can be reduced by half.
3. Forging a blank, wherein the preforging process forges the rectangular blank into a preforging piece in the shape of a composite finish-forged part;
and air cooling the forged piece forged in the pre-forging process, and performing shot blasting treatment on the surface of the forged piece.
4. The method of forging the train adapter according to claim 1 wherein the finish forging operation includes the following steps.
5. And (3) polishing the forged piece forged in the pre-forging process, removing the surface defects of the pre-forged piece and ensuring that the polishing width-depth ratio is more than or equal to 10.
6. The box type resistance furnace is adopted to preheat the pre-forged piece again, the heating temperature is 1220 +/-20 ℃, the total heating time is not less than 0.8h, the resistance furnace is filled with a blank after being heated to the specified temperature, the heat preservation time is calculated after the furnace temperature is raised to the specified temperature, the heat preservation time of the forged piece at the forging temperature can be prolonged under certain abnormal conditions, and the longest heat preservation time cannot exceed 1 h; when the steel billet reaches the maximum heat preservation time at the forging temperature and can not be taken out of the furnace for forging due to the maximum heat preservation time, the furnace temperature can be reduced to 1000-1050 ℃ for heat preservation within 6h, and the heat preservation time when the steel billet is heated to the forging temperature can be reduced by half.
7. Forging the pre-forging piece to obtain a qualified bearing saddle forging piece;
and air-cooling the forged piece after the finish forging process to room temperature, then performing shot blasting treatment on the forged piece, and marking the forged piece.
8. The method of forging the train bearing saddle according to claim 1 or 2, wherein the forging is of 35 gauge steel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111302247.5A CN113996740A (en) | 2021-11-04 | 2021-11-04 | Train bearing saddle forging forming method |
| CN202210838381.5A CN116078966A (en) | 2021-11-04 | 2022-07-18 | Multidirectional die forging forming method for bearing saddle forging piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111302247.5A CN113996740A (en) | 2021-11-04 | 2021-11-04 | Train bearing saddle forging forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113996740A true CN113996740A (en) | 2022-02-01 |
Family
ID=79927583
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111302247.5A Withdrawn CN113996740A (en) | 2021-11-04 | 2021-11-04 | Train bearing saddle forging forming method |
| CN202210838381.5A Pending CN116078966A (en) | 2021-11-04 | 2022-07-18 | Multidirectional die forging forming method for bearing saddle forging piece |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210838381.5A Pending CN116078966A (en) | 2021-11-04 | 2022-07-18 | Multidirectional die forging forming method for bearing saddle forging piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN113996740A (en) |
-
2021
- 2021-11-04 CN CN202111302247.5A patent/CN113996740A/en not_active Withdrawn
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2022
- 2022-07-18 CN CN202210838381.5A patent/CN116078966A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN116078966A (en) | 2023-05-09 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20220201 |