CN108326215B - Light and thin combined tooth closed forging process - Google Patents
Light and thin combined tooth closed forging process Download PDFInfo
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- CN108326215B CN108326215B CN201711391961.XA CN201711391961A CN108326215B CN 108326215 B CN108326215 B CN 108326215B CN 201711391961 A CN201711391961 A CN 201711391961A CN 108326215 B CN108326215 B CN 108326215B
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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
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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
- B21J13/08—Accessories for handling work or tools
- B21J13/10—Manipulators
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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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
- Forging (AREA)
Abstract
the invention discloses a light and thin combined tooth closed forging process which comprises the following steps: the method comprises the following steps: 1) feeding; 2) pre-forging; 3) expanding the hole, namely expanding the inner diameter of the workpiece to a target size by using a cold ring rolling machine; 4) heating the workpiece; 5) finish forging, namely forging and forming the workpiece through a closed forging die; 6) normalizing by utilizing forging waste heat; 7) carburizing, namely performing surface hardening treatment on the whole workpiece by using a carburizing technology; 8) quenching, namely heating and quenching the whole workpiece; 9) and tempering, namely tempering the whole workpiece at low temperature. The method is suitable for forming light and thin combined teeth, particularly combined teeth with deep inner steps, the utilization rate of materials is improved, and the efficiency of subsequent finishing machining is improved; the forging waste heat is utilized for normalizing treatment, so that the energy consumption is greatly reduced, and the productivity is improved; the carburization treatment improves the surface hardness of the workpiece and prolongs the service life of the gear product.
Description
Technical Field
The invention relates to the technical field of advanced manufacturing and automation, in particular to a light and thin combined tooth closed forging process.
background
the parts of the gearbox bear a very severe working environment all the time, so the performance requirements on the parts of the gearbox are greatly higher than those of common parts all the time. The transmission mainly comprises shaft and gear products, and the forged products are the main production modes of automobile transmission parts with material saving, energy saving, high yield and high performance.
the material utilization rate can be improved by the aid of the grinding and expanding molding, but some products are not suitable for the grinding and expanding molding, such as light and thin combined teeth with deep inner steps, so that a reasonable process procedure is designed for the combined teeth, the processing quality is guaranteed, the material utilization rate can be further improved, and the novel problem to be solved is provided.
disclosure of Invention
the purpose of the invention is as follows: the invention discloses a light and thin combined tooth closed forging process, which has the advantages that the process is simplified and reasonable, the finish forging is carried out after the pre-forging and the hole expanding, the process is suitable for forming light and thin combined teeth especially with deeper inner steps, the utilization rate of materials is improved, the closed die forging does not generate flash material tails, the rejection rate is low, only a small amount of burrs are generated on the materials, the forging efficiency is improved, and the efficiency of subsequent finish machining is improved; the forging waste heat is utilized for normalizing treatment, the heat energy of the workpiece is reasonably utilized, the energy consumption is greatly reduced, and the productivity is improved; the carburization treatment improves the surface hardness of the workpiece and prolongs the service life of the gear product.
The technical scheme is as follows: in order to achieve the purpose, the invention discloses a light and thin combined tooth closed forging process which comprises the following steps: the method comprises the following steps: 1) feeding; 2) pre-forging; 3) expanding the hole, namely expanding the inner diameter of the workpiece to a target size by using a cold ring rolling machine; 4) heating the workpiece; 5) finish forging, namely forging and forming the workpiece through a closed forging die; 6) normalizing by utilizing forging waste heat; 7) carburizing, namely performing surface hardening treatment on the whole workpiece by using a carburizing technology; 8) quenching, namely heating and quenching the whole workpiece; 9) and tempering, namely tempering the whole workpiece at low temperature.
Further, the light and thin combined tooth closed forging process comprises the raw materials of carburizing steel, wherein the raw materials comprise, by mass, 0.25% ~ 0.3.3% of C, 0.15% ~ 0.35.35% of Si, 0.15% ~ 0.5.5% of Cr, 0.3% ~ 1.2.2% of Mn, 2% ~ 3% of Ni, 0.5% ~ 0.75.75% of Mo, 0.05% ~ 0.15.15% of V, 0.8% ~ 1.2.2% of W, 0.035% of Ti, 0.05% ~ 0.05, 0.001% ~ 0.005.005% of B, 0.01% ~ 0.015.015% of Rem, less than or equal to 0.02% of S, less than or equal to 0.02% of P, and the balance Fe.
further, according to the light and thin combined tooth closed forging process, the process further comprises the following steps after tempering: cooling the workpiece to room temperature; and (5) finishing and deburring.
further, according to the light and thin combined tooth closed forging process, the normalizing is isothermal normalizing.
Further, according to the light and thin combined tooth closed forging process, the normalizing, the carburizing, the quenching and the tempering are performed in the heat treatment equipment, the heat treatment equipment is sequentially provided with a normalizing treatment area, a carburizing treatment area, a quenching treatment area and a tempering treatment area, and the heat treatment equipment is further provided with a conveying device penetrating through the normalizing treatment area, the carburizing treatment area, the quenching treatment area and the tempering treatment area.
Further, according to the light and thin combined tooth closed forging process, the normalizing treatment area utilizes forging waste heat of the workpiece to perform normalizing treatment, and the normalizing treatment area performs auxiliary heating.
further, above-mentioned frivolous type combines tooth closed forging technology, the closed forging mould includes that lower mould and lower extreme are equipped with the last mould of convex part, the laminating of the die cavity lateral wall of convex part outer wall and lower mould, the lower mould is equipped with a set of ejector pin.
Further, above-mentioned frivolous type combines tooth closed forging technology, be equipped with fortune material manipulator between closed forging mould and the thermal treatment equipment, fortune material manipulator sets up on the base to rotate with vertical base and be connected, fortune material manipulator is connected with rotation drive arrangement.
The technical scheme shows that the invention has the following beneficial effects:
(1) The light and thin combined tooth closed forging process has the advantages that the process is simple and reasonable, the finish forging is carried out after the pre-forging and the hole expanding, the process is suitable for forming light and thin combined teeth especially with deep inner steps, the utilization rate of materials is improved, the closed die forging does not generate flash material tails, the rejection rate is low, only a small amount of burrs are generated on the materials, the forging efficiency is improved, and meanwhile, the efficiency of subsequent finish machining is improved; the forging waste heat is utilized for normalizing treatment, the heat energy of the workpiece is reasonably utilized, the energy consumption is greatly reduced, and the productivity is improved; the carburization treatment improves the surface hardness of the workpiece and prolongs the service life of the gear product.
(2) According to the light and thin combined tooth closed forging process, the carburized steel with the formula has good hardenability and carburization capacity, the surface of the carburized steel has high hardness and high wear resistance, and the interior of the carburized steel has enough toughness and strength; the reasonable addition of the alloy elements Cr, Mn and Ni can improve the hardenability of the carburizing steel, thereby improving the internal strength and toughness; added Mo, V, W and other elements refine austenite crystals by forming stable carbides and improve the wear resistance of the surface; the reasonable addition of Si improves the tempering softening resistance; the rational addition of the rare earth element Rem, combined in MnS, suppresses the shape elongation by MnS at the time of rolling and hot forging.
(3) According to the light and thin combined tooth closed forging process, uniform and consistent refined structures can be obtained through isothermal normalizing, the performance of materials is improved, the cutting processing performance is improved, and the quenching deformation rule is more stable.
(4) The light and thin combined tooth closed forging process provided by the invention has the advantages that continuous automatic heat treatment equipment and heat treatment process are adopted, the overall normal continuity and temperature control capability are improved, the labor cost is reduced, and the product quality can be improved.
(5) According to the light and thin combined tooth closed forging process, the closed forging die is simple and reliable in structure, no flash scrap is generated, the utilization rate of raw materials is improved, the rejection rate is low, and the subsequent turning efficiency is improved.
(6) according to the light and thin combined tooth closed forging process, the whole automation degree and production continuity are improved through the design of the manipulator, and the production efficiency is improved.
drawings
FIG. 1 is a schematic view of a closed forging die, a robot and a heat treatment apparatus according to the present invention;
FIG. 2 is a detailed schematic diagram of the closed forging die and robot of the present invention;
FIG. 3 is a schematic view of a workpiece according to the present invention;
In the figure: 1-workpiece, 2-closed forging die, 21-lower die, 22-convex part, 23-upper die, 24-ejector rod, 3-heat treatment equipment, 31-normalizing treatment zone, 32-carburizing treatment zone, 33-quenching treatment zone, 34-tempering treatment zone, 35-conveying device, 4-mechanical arm, 41-mechanical arm, 42-clamping jaw and 5-base.
Detailed Description
the following detailed description of embodiments of the invention refers to the accompanying drawings.
Examples
The invention discloses a light and thin combined tooth closed forging process, which comprises the following steps as shown in figures 1 to 3:
1) The raw material is carburizing steel which comprises, by mass, 0.25% ~ 0.3.3% of C, 0.15% ~ 0.35.35% of Si, 0.15% ~ 0.5.5% of Cr, 0.3% ~ 1.2.2% of Mn, 2% ~ 3% of Ni, 0.5% ~ 0.75.75% of Mo, 0.05% ~ 0.15.15% of V, 0.8% ~ 1.2.2% of W, 0.035% ~ 0.05.05% of Ti, 0.001% ~ 0.005.005% of B, 0.01% ~ 0.015.015% of Rem, less than or equal to 0.02% of S, less than or equal to 0.02% of P, and the balance of Fe;
2) pre-forging;
3) Reaming, namely enlarging the inner diameter of the workpiece 1 to a target size by using a cold ring rolling machine;
4) Heating the workpiece 1;
5) Finish forging, namely forging and forming the workpiece 1 through a closed forging die 2;
6) Normalizing by utilizing forging waste heat, wherein the normalizing is isothermal normalizing;
7) Carburizing, namely performing surface hardening treatment on the whole workpiece 1 by using a carburizing technology;
8) Quenching, namely heating and quenching the whole workpiece 1;
9) tempering, namely tempering the whole workpiece 1 at a low temperature;
10) cooling the workpiece 1 to room temperature;
11) And (5) finishing and deburring.
The normalizing, carburizing, quenching and tempering in the present embodiment are performed in a heat treatment apparatus 3, the heat treatment apparatus 3 is provided with a normalizing treatment zone 31, a carburizing treatment zone 32, a quenching treatment zone 33 and a tempering treatment zone 34 in sequence, and the heat treatment apparatus 3 is further provided with a conveying device 35 penetrating through the normalizing treatment zone 31, the carburizing treatment zone 32, the quenching treatment zone 33 and the tempering treatment zone 34. The normalizing treatment area 31 performs normalizing treatment by using forging waste heat of the workpiece 1, and the normalizing treatment area 31 performs auxiliary heating.
In this embodiment the closed forging die 2 includes a lower die 21 and an upper die 23 having a lower end provided with a convex portion 22, the outer wall of the convex portion 22 is attached to the outer side wall of the cavity of the lower die 21, and the lower die 21 is provided with a set of carrier rods 24. Be equipped with fortune material manipulator 4 between closed forging mould 2 and the thermal treatment equipment 3, fortune material manipulator 4 sets up on base 5 to rotate with vertical base 5 and be connected, fortune material manipulator 4 is connected with and rotates drive arrangement. The material conveying manipulator 4 comprises two mechanical arms 41 which are oppositely arranged, and the two mechanical arms 41 are provided with lifting driving devices; the end of the robot arm 41 is provided with a set of gripping jaws 42.
in this embodiment, the specific steps of the material transporting manipulator 4 transporting the workpiece 1 include:
1. the forged workpiece 1 in the closed forging die 2 is clamped by a mechanical arm 41 and a group of clamping jaws 42 on one side of a material conveying mechanical arm 4 close to the closed forging die 2 under the driving of a lifting driving device of the mechanical arm;
2. The material conveying manipulator 4 is driven by a rotation driving device to rotate, the mechanical arm 41 and a group of clamping jaws 42 clamp the workpiece 1, and the workpiece 1 and the clamping jaws rotate together to the conveying device 35 of the heat treatment equipment 3 and are placed on the conveying device 35; the opposite robot arm 41 and the set of gripping jaws 42 are rotated from the previous transfer device 35 to the closed forging mould 2;
3. when the material conveying manipulator 4 conveys the next workpiece 1, the above steps are repeated.
Therefore, the material conveying manipulator can convey one workpiece 1 every time the material conveying manipulator rotates 180 degrees, and the original conveying of one workpiece 1 is changed into the conveying of two workpieces by one rotation, so that the efficiency is improved, and the stroke is saved.
in this example, the following ingredients are preferred:
The raw material carburizing steel comprises, by mass, 0.25% of C, 0.15% of Si, 0.15% of Cr, 0.3% of Mn, 2% of Ni, 0.75% of Mo, 0.05% of V, 0.8% of ~ 1.2.2% of W, 0.05% of Ti, 0.001% of B, 0.01% of Rem, less than or equal to 0.02% of S, less than or equal to 0.02% of P, and the balance of Fe.
the raw material carburizing steel comprises the following components in percentage by mass: c: 0.3%, Si: 0.35%, Cr: 0.5%, Mn: 1.2%, Ni: 3%, Mo: 0.5%, V: 0.15%, W: 1.2%, Ti: 0.035%, B: 0.005%, Rem: 0.015 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P and the balance of Fe.
The raw material carburizing steel comprises the following components in percentage by mass: c: 0.27%, Si: 0.25%, Cr: 0.3%, Mn: 0.8%, Ni: 2.5%, Mo: 0.65%, V: 0.1%, W: 1%, Ti: 0.04%, B: 0.003%, Rem: 0.012 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, and the balance of Fe.
the foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (1)
1. A light and thin combined tooth closed forging process is characterized in that: the method comprises the following steps:
1) feeding the raw materials, namely carburizing steel, wherein the raw materials comprise, by mass, 0.25% ~ 0.3.3% of C, 0.15% ~ 0.35.35% of Si, 0.15% ~ 0.5.5% of Cr, 0.3% ~ 1.2.2% of Mn, 2% ~ 3% of Ni, 0.5% ~ 0.75.75% of Mo, 0.05% ~ 0.15.15% of V, 0.8% ~ 1.2.2% of W, 0.035% ~ 0.05.05% of Ti, 0.001% ~ 0.005.005% of B, 0.01% ~ 0.015.015% of Rem, less than or equal to 0.02% of S, less than or equal to 0.02% of P, and the balance of Fe;
2) pre-forging;
3) Expanding the hole, namely expanding the inner diameter of the workpiece to a target size by using a cold ring rolling machine;
4) Heating the workpiece;
5) Finish forging, namely forging and forming the workpiece through a closed forging die;
6) Isothermal normalizing by using forging waste heat;
7) carburizing, namely performing surface hardening treatment on the whole workpiece by using a carburizing technology;
8) Quenching, namely heating and quenching the whole workpiece;
9) Tempering, namely tempering the whole workpiece at low temperature, and cooling the workpiece to room temperature after tempering; fine trimming and deburring;
according to the light and thin combined tooth closed forging process, the closed forging die comprises a lower die and an upper die, the lower end of the upper die is provided with a convex part, the outer wall of the convex part is attached to the outer side wall of a cavity of the lower die, the lower die is provided with a group of ejector rods, a material conveying manipulator is arranged between the closed forging die and heat treatment equipment, the material conveying manipulator is arranged on a base and is rotationally connected with a vertical base, the material conveying manipulator is connected with a rotation driving device, the material conveying manipulator comprises two mechanical arms which are oppositely arranged, and the two mechanical arms are both provided with a lifting driving device; a group of clamping jaws are arranged at the end part of the mechanical arm;
The specific steps of the material conveying manipulator for conveying the workpiece comprise:
(1) The workpiece which is forged in the closed forging die is clamped by a mechanical arm and a group of clamping jaws which are arranged on one side of the closed forging die and close to the conveying manipulator under the driving of a lifting driving device;
(2) The material conveying mechanical arm is driven by the rotation driving device to rotate, the mechanical arm and the group of clamping jaws clamp the workpiece, and the mechanical arm and the group of clamping jaws rotate to a conveying device of the heat treatment equipment together and are placed on the conveying device; the other opposite mechanical arm and a group of clamping jaws rotate to the closed forging die from the original conveying device;
(3) repeating the steps (1) to (3) when the material conveying manipulator conveys the next workpiece;
The normalizing, carburizing, quenching and tempering are carried out in heat treatment equipment, the heat treatment equipment is sequentially provided with a normalizing treatment area, a carburizing treatment area, a quenching treatment area and a tempering treatment area, and the heat treatment equipment is also provided with a conveying device penetrating through the normalizing treatment area, the carburizing treatment area, the quenching treatment area and the tempering treatment area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711391961.XA CN108326215B (en) | 2017-12-21 | 2017-12-21 | Light and thin combined tooth closed forging process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711391961.XA CN108326215B (en) | 2017-12-21 | 2017-12-21 | Light and thin combined tooth closed forging process |
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| CN108326215B true CN108326215B (en) | 2019-12-10 |
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| CN113843382B (en) * | 2021-07-14 | 2024-04-26 | 攀枝花市仁通钒业有限公司 | Production process of vanadium titanium carbide alloy |
| CN114293136B (en) * | 2021-12-31 | 2024-08-02 | 重庆市星极齿轮有限责任公司 | Workpiece heat treatment system |
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| CN202263881U (en) * | 2011-10-30 | 2012-06-06 | 东风锻造有限公司 | Forging die |
| CN105499941A (en) * | 2015-12-22 | 2016-04-20 | 江苏保捷锻压有限公司 | Forging and pressing technology and steel material for forged pieces of driven gears of main reducers of automobiles |
| CN105908096A (en) * | 2016-06-19 | 2016-08-31 | 贵州高峰石油机械股份有限公司 | Low-carbon multi-element micro-alloyed multipurpose high-strength and high-toughness structural steel |
| CN106111874A (en) * | 2016-07-14 | 2016-11-16 | 江苏保捷精锻有限公司 | A kind of processing method of automobile-use bearing forging |
| CN106111876A (en) * | 2016-07-14 | 2016-11-16 | 江苏保捷精锻有限公司 | A kind of processing method of automobile-use reverse gear forging |
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| CN108326215A (en) | 2018-07-27 |
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