CN112846059A - Free forging process of bearing seat - Google Patents
Free forging process of bearing seat Download PDFInfo
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- CN112846059A CN112846059A CN202011608870.9A CN202011608870A CN112846059A CN 112846059 A CN112846059 A CN 112846059A CN 202011608870 A CN202011608870 A CN 202011608870A CN 112846059 A CN112846059 A CN 112846059A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/26—Making machine elements housings or supporting parts, e.g. axle housings, engine mountings
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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
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- 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
-
- 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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
-
- 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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K29/00—Arrangements for heating or cooling during processing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a free forging process of a bearing seat, which comprises the steps of preparing materials, selecting a material 45# of a forging piece according to the process requirement of a trunnion body during forging, and forging; preheating a forging piece: blanking 200 square steel, heating by a natural gas heating furnace, keeping the temperature at the initial forging temperature for 3-5h, and then discharging from the furnace for forging; upsetting and drawing the forging piece: after the blank is discharged from the furnace, the blank is heavily impacted, upset and drawn out to be long, and the forging ratio is ensured to be more than or equal to 3.0 and is up to 200 multiplied by 350; stamping a forged piece: placing the groove pressing core mold at the half-hole position of the square billet, hammering the groove pressing core mold to the half position of the core mold, taking out the core mold, and returning the billet to the furnace; molding: returning the blank to the furnace, keeping the temperature for 3-5 hours, discharging the blank from the furnace, forging and forming by using two fire, placing a shaping die at the concave position of the blank, shaping the blank and the forging into a forging drawing together, taking out the shaping die, and finishing the forging; the invention ensures that the forging has uniform deformation, high qualification rate, high forging quality, small customer machining allowance, greatly reduced machining cost and high production efficiency.
Description
Technical Field
The invention relates to the technical field of forging, in particular to a free forging process of a bearing seat.
Background
The bearing seat is an important supporting element, is mainly used for supporting a bearing and is widely applied in the mechanical field, the blank is freely forged in the traditional process, and die forging forming is carried out on a forging hammer, but the forging mode can cause that the blank manufacturing is not accurate enough, folding cracks can appear on a forged piece, defects exist due to incomplete punching, the rejection rate of products is high, and the market economic pressure is increased day by day, the free forging technology is forced to be updated in real time, the shape is forged, and the machining allowance is forced to be reduced.
Disclosure of Invention
The present invention is directed to a free forging process for a bearing seat to solve the above problems.
In order to achieve the purpose, the invention is realized by the following technical means:
a free forging process of a bearing seat comprises the following steps:
preparing materials, namely selecting a material 45# of a forge piece according to the technological requirements of a trunnion body during forging, and forging;
preheating a forged piece: blanking 200 square steel, heating by a natural gas heating furnace, keeping the temperature at the initial forging temperature for 3-5h, and then discharging from the furnace for forging;
upsetting and drawing the forging piece: after the blank is discharged from the furnace, the blank is heavily impacted, upset and drawn out to be long, and the forging ratio is ensured to be more than or equal to 3.0 and is up to 200 multiplied by 350;
stamping the forged piece: placing the groove pressing core mold at the half-hole position of the square billet, hammering the groove pressing core mold to the half position of the core mold, taking out the core mold, and returning the billet to the furnace;
and (5) forming: and (4) after the blank is returned to the furnace and is kept warm for 3-5 hours, discharging the blank and forging and forming by two fire, placing the sizing die at the concave position of the blank, sizing the blank and the forging to the forging drawing together, taking out the sizing die, and finishing the forging.
Further, in the step (2), 200 square steel is adopted for blanking, and is heated by a natural gas heating furnace, when the temperature reaches 500-.
Further, in the step (2), the initial forging temperature is set at 1200-.
Further, in the step (5), the blank is returned to the furnace and heated to 1200-1250 ℃, and is discharged from the furnace for two-fire forging and forming after heat preservation for 3 hours.
Further, in the step (4), the groove pressing core mold is preheated to 350-420 ℃, so that the uniform deformation of the forging can be ensured, and the machining cutting amount is small.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts the simple die to finish the free forging forming of the bearing seat forging, and the concave gear is extruded by the simple die, so that the phenomenon that the common free forging cannot be forged is avoided, the uniform deformation of the forging is ensured, the yield is high, the quality of the forging is high, the machining allowance of a customer is small, the machining cost is greatly reduced, and the production efficiency is high.
Description of the drawings:
FIG. 1 is a schematic view of the process of the present invention;
FIG. 2 is a schematic structural diagram of a product prepared by the invention;
FIG. 3 is a schematic view of a groove mandrel structure used in the process of the present invention;
FIG. 4 is a schematic view of the structure of a sizing die used in the process of the present invention.
The specific implementation mode is as follows:
in order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention is further described below with reference to the following examples:
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The invention relates to a method for preparing a composite material, which comprises the following steps: see the drawings.
In this embodiment, a free forging process for a bearing seat includes the following steps:
preparing materials, namely selecting a material 45# of a forge piece according to the technological requirements of a trunnion body during forging, and forging;
preheating a forged piece: blanking 200 square steel, heating by a natural gas heating furnace, keeping the temperature at the initial forging temperature for 3-5h, and then discharging from the furnace for forging;
upsetting and drawing the forging piece: after the blank is discharged from the furnace, the blank is heavily impacted, upset and drawn out to be long, and the forging ratio is ensured to be more than or equal to 3.0 and is up to 200 multiplied by 350;
stamping the forged piece: placing the groove pressing core mold at the half-hole position of the square billet, hammering the groove pressing core mold to the half position of the core mold, taking out the core mold, and returning the billet to the furnace;
and (5) forming: and (4) after the blank is returned to the furnace and is kept warm for 3-5 hours, discharging the blank and forging and forming by two fire, placing the sizing die at the concave position of the blank, sizing the blank and the forging to the forging drawing together, taking out the sizing die, and finishing the forging.
Further, in the step (2), 200 square steel is adopted for blanking, and is heated by a natural gas heating furnace, when the temperature reaches 500-.
Further, in the step (2), the initial forging temperature is set at 1200-.
Further, in the step (5), the blank is returned to the furnace and heated to 1200-1250 ℃, and is discharged from the furnace for two-fire forging and forming after heat preservation for 3 hours.
Further, in the step (4), the groove pressing core mold is preheated to 350-420 ℃, so that the uniform deformation of the forging can be ensured, and the machining cutting amount is small.
Example 1
A free forging process of a bearing seat comprises the following steps:
preparing materials, namely selecting a material 45# of a forge piece according to the technological requirements of a trunnion body during forging, and forging;
preheating a forged piece: blanking 200 square steel, heating by a natural gas heating furnace, preserving heat for 0.6h when the temperature reaches 540 ℃, then heating to 910 ℃, preserving heat for 0.6h, setting the initial forging temperature at 1240 ℃, preserving heat for 3.5h at the initial forging temperature, and then discharging from the furnace for forging;
upsetting and drawing the forging piece: after the blank is discharged from the furnace, the blank is heavily impacted, upset and drawn out to be long, and the forging ratio is ensured to be 4 to 200 multiplied by 350 square;
stamping the forged piece: preheating a groove pressing core mold to 400 ℃, placing the groove pressing core mold at the half-hole position of the square billet, hammering the groove pressing core mold to the half position of the core mold, taking out the core mold, and returning the billet to the furnace;
and (5) forming: and (3) returning the blank to the furnace and heating to 1240 ℃, keeping the temperature for 3 hours, discharging the blank from the furnace, forging and forming by using two fire, placing the sizing die at the concave position of the blank, sizing the blank together to a forge piece drawing, taking out the sizing die, and finishing forging.
Example 2
A free forging process of a bearing seat comprises the following steps:
preparing materials, namely selecting a material 45# of a forge piece according to the technological requirements of a trunnion body during forging, and forging;
preheating a forged piece: blanking 200 square steel, heating by a natural gas heating furnace, preserving heat for 0.8h when the temperature reaches 520 ℃, then heating to 890 ℃, preserving heat for 0.8h, setting the initial forging temperature at 1220 ℃, preserving heat for 4h at the initial forging temperature, and then discharging from the furnace for forging;
upsetting and drawing the forging piece: after the blank is discharged from the furnace, the blank is heavily impacted, upset and drawn out to be long, and the forging ratio is ensured to be 5 to 200 multiplied by 350 square;
stamping the forged piece: preheating a groove pressing core mold to 380 ℃, placing the groove pressing core mold at the half-hole position of the square billet, hammering the groove pressing core mold to the half position of the core mold, taking out the core mold, and returning the billet to the furnace;
and (5) forming: returning the blank to the furnace and heating to 1220 ℃, keeping the temperature for 3 hours, discharging the blank from the furnace and forging and forming by two fire, placing a sizing die at the concave position of the blank, sizing the blank and the blank to a forge piece drawing together, taking out the sizing die, and finishing forging
Experiments prove that the process for preparing the forged piece has the advantages of uniform deformation, high qualification rate, high forged piece quality, small customer machining allowance, greatly reduced machining cost and high production efficiency.
The embodiments disclosed in the present invention are within the scope of the claims, and the specific embodiments are only for describing the specific embodiments of the present invention, and the scope of the present invention is not limited to the specific embodiments, and the specific embodiments should not be construed as limiting the scope of the claims.
The product structure connection relation falling within the protection scope of the invention falls within the protection content of the invention; it is within the spirit of the present invention that conventional technical modifications to the structure of product parts, such as those made in the specific embodiments of the present invention, may be made without departing from the spirit of the present invention.
While certain exemplary embodiments of the invention have been described above by way of illustration only, it will be apparent to those skilled in the art that the described embodiments may be modified in various different ways without departing from the scope of the invention. Accordingly, the foregoing description is illustrative in nature and is not to be construed as limiting the scope of the invention as claimed.
Unless defined otherwise, all academic and scientific terms used herein have the same meaning as is understood by one of ordinary skill in the art to which this invention belongs.
In case of conflict, the present specification, including definitions, will control.
All percentages, parts, ratios, etc., are by weight unless otherwise indicated.
When a value or range of values, preferred range or list of lower preferable values and upper preferable values is given, it should be understood that it specifically discloses any range formed by any pair of values of any lower range limit or preferred value and any upper range limit or preferred value, regardless of whether ranges are separately disclosed. Where a range of numerical values is described herein, unless otherwise stated, the range is intended to include the endpoints of the range and all integers and fractions within the range.
When the term "about" or "approximately" is used to describe a numerical value or an end of a range, the disclosure should be interpreted to include the specific numerical value or end points referred to.
The use of "a" and "an" are merely for convenience and to provide a general context for the invention. Unless expressly stated otherwise, this description should be read to include one or at least one.
Claims (5)
1. The free forging process of the bearing seat is characterized by comprising the following steps: the method comprises the following steps:
preparing materials, namely selecting a material 45# of a forge piece according to the technological requirements of a trunnion body during forging, and forging;
preheating a forged piece: blanking 200 square steel, heating by a natural gas heating furnace, keeping the temperature at the initial forging temperature for 3-5h, and then discharging from the furnace for forging;
upsetting and drawing the forging piece: after the blank is discharged from the furnace, the blank is heavily impacted, upset and drawn out to be long, and the forging ratio is ensured to be more than or equal to 3.0 and is up to 200 multiplied by 350;
stamping the forged piece: placing the groove pressing core mold at the half-hole position of the square billet, hammering the groove pressing core mold to the half position of the core mold, taking out the core mold, and returning the billet to the furnace;
and (5) forming: and (4) after the blank is returned to the furnace and is kept warm for 3-5 hours, discharging the blank and forging and forming by two fire, placing the sizing die at the concave position of the blank, sizing the blank and the forging to the forging drawing together, taking out the sizing die, and finishing the forging.
2. The free forging process of a bearing housing according to claim 1, wherein: in the step (2), 200 square steel is adopted for blanking, and the steel is heated by a natural gas heating furnace, when the temperature reaches 500-550 ℃, the heat is preserved for 0.5-1h, then the temperature is raised to 880-920 ℃, the heat is preserved for 0.5-1h, and the steel is taken out of the furnace and forged after the heat is preserved for 4h at the initial forging temperature.
3. The free forging process of a bearing housing according to claim 1, wherein: in the step (2), the initial forging temperature is set at 1200-1250 ℃, and the forging is taken out of the furnace and forged after the initial forging temperature is kept for 4 hours.
4. The free forging process of a bearing housing according to claim 1, wherein: in the step (5), the blank is returned to the furnace and heated to 1200-1250 ℃, and is discharged from the furnace for two-fire forging and forming after heat preservation for 3 hours.
5. The free forging process of a bearing seat as claimed in claim 1, wherein in the step (4), the groove pressing core mold is preheated to 350-420 ℃, so as to ensure uniform deformation of the forging and small machining cutting amount.
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| CN202011608870.9A CN112846059A (en) | 2020-12-30 | 2020-12-30 | Free forging process of bearing seat |
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| CN202011608870.9A CN112846059A (en) | 2020-12-30 | 2020-12-30 | Free forging process of bearing seat |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114082873A (en) * | 2021-09-18 | 2022-02-25 | 中国航发北京航空材料研究院 | Superplastic isothermal forging forming method |
| CN116984537A (en) * | 2023-09-26 | 2023-11-03 | 定襄县国强锻压有限公司 | Free forging manufacturing method for shaft forge piece |
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