CN110732613A - main reduction gear and molding process thereof - Google Patents
main reduction gear and molding process thereof Download PDFInfo
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- CN110732613A CN110732613A CN201910950616.8A CN201910950616A CN110732613A CN 110732613 A CN110732613 A CN 110732613A CN 201910950616 A CN201910950616 A CN 201910950616A CN 110732613 A CN110732613 A CN 110732613A
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- 238000000034 method Methods 0.000 title claims description 24
- 238000000465 moulding Methods 0.000 title claims description 11
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 11
- 238000000137 annealing Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000005422 blasting Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000005097 cold rolling Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000004677 Nylon Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005255 carburizing Methods 0.000 claims description 3
- 239000012459 cleaning agent Substances 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 239000003350 kerosene Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005242 forging Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
- B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
-
- 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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
-
- 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
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
-
- 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
- C21D1/32—Soft annealing, e.g. spheroidising
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses main reduction gears, which comprise a gear body, wherein an opening is formed in the gear body, a boss is formed on the outer part of the gear body, and a groove is formed between the opening and the boss.
Description
Technical Field
The invention belongs to the technical field of new materials, and particularly relates to main reduction gears.
Background
With the rapid development of social economy, the living standard and the living quality of people are continuously improved, and the rhythm of people is continuously accelerated in both production and life, so is the production of enterprises.
Present gear machining beats and to forge through equipment more, however its whole process need consume a large amount of raw and other materials, and because its material is harder, often can cause the damage to press and cutter, improve the manufacturing cost input of enterprise, and present mould leaves the space between last mould, lower mould, just so lead to it still need process once more to it in the later stage, whole process is comparatively complicated, and can cause the waste of raw materials, therefore current forging technology still remains to be improved.
Disclosure of Invention
The invention aims to overcome the defects, the main reduction gears are provided, the structure is simple, the design is reasonable, the structure of the main reduction gears is optimized, the consumption of raw materials is reduced, the material utilization rate is improved, the hitting force of forging equipment is reduced, the load of a press is reduced, and the service life of the press is prolonged.
Technical scheme in order to achieve the purpose, the invention provides main reduction gear molding processes.
The main reduction gear forming processes optimize the structure of the main reduction gear, reduce the consumption of raw materials, improve the utilization rate of the materials, reduce the striking force of forging equipment, reduce the load of a press and prolong the service life of the press.
The gear body is arranged between the upper die and the lower die, the upper die is provided with a lower convex part, the lower convex part is provided with a boss, the boss is provided with an inner groove, the lower die is concave, the middle part of the lower die is provided with an upper convex part, the upper die is matched with the lower die, and a cavity for processing the gear body is arranged between the upper die and the lower die.
According to the invention, the lower die is concave, the side plates are arranged on two sides of the upper convex part, the storage cavity is arranged on the lower part of the upper convex part, the feeding pipelines are arranged on two sides of the storage cavity, and the upper convex part and the side plates form a cavity. The storage cavity is arranged, so that the supply of cavity raw materials can be effectively guaranteed, and the processing quality of products is guaranteed.
The cavity is in a convex shape, the feeding pipeline is communicated with the cavity, and the feeding pipeline is provided with a control valve.
In the invention, the lower convex part is provided with a convex block which is matched with the groove.
The feed inlet of the storage cavity is connected with the raw material box through a pipeline.
The forming process of the main reducing gear comprises the following specific steps:
1) coating layers of mould release agent in the cavity (23) of the mould (2);
2): meanwhile, the metal round steel is subjected to intermediate frequency induction heating to form a blank, heat preservation is carried out, the heat preservation temperature is 1100-;
3): then the blank is sent into the storage cavity (223) through a pipeline and is extruded into the cavity (23), and when the cavity (23) is filled with the blank, the control valve is closed;
4): then, upsetting the blank by using an electro-hydraulic hammer, and pressing an upper die (21) and a lower die (22) to form a gear body (1);
5): cooling the mold (2) to room temperature, and demolding the gear;
6): after demolding, spheroidizing annealing is carried out in a roller-hearth type continuous nitrogen-based protective atmosphere furnace;
7): shot blasting is carried out for 20min by adopting a shot blasting machine, so that an oxide skin layer and an oxide film on the surface are removed, and the surface roughness is improved;
8): and (3) setting a rolling pressure of 8-16 MPa by using a cold rolling machine for cold rolling for 7-10 s, and setting a diameter-adjusting pressure of 8-12 MPa.
After the gear body (1) is processed, the surface of the gear body is cleaned, and the specific cleaning mode is as follows:
the method comprises the following steps of (1) carrying out rotary washing on the heavier garbage on the inner wall of a gear body (1) and the surface of a raceway by adopting an automatic motor nylon brush, and then cleaning the tiny garbage by adopting multi-groove channel type ultrasonic waves with a gear water agent cleaning agent as a cleaning medium at the frequency of 30kHz and the power of 1 kW;
and (5) repeatedly cleaning and rinsing for 2-3 times, and finally drying.
The forming process of the main reducing gear is characterized by comprising the following steps of; the spheroidizing annealing adopts a stepped temperature rise mode to finish the carburizing and spheroidizing annealing of the gear, and specifically comprises the following steps: the furnace temperature is raised to 250 ℃, the furnace temperature is kept at 250 +/-10 ℃, and the heat preservation time is 3 hours; continuously heating to 650 ℃, keeping the furnace temperature at 650 +/-10 ℃ and keeping the temperature for 3 hours; and when the temperature is continuously increased to 890 ℃, dripping 180 drops of methanol and kerosene by two groups of symmetrical drip injectors respectively, wherein 100 drops of methanol are 3.6ml per minute, the dripping is stopped after the dripping time reaches 18 minutes, the furnace temperature is kept at 890 +/-10 ℃, the furnace temperature is kept for 3 hours, the furnace is cooled to 600 ℃, and then the temperature is increased for spheroidization.
The technical scheme shows that the invention has the following beneficial effects: .
1. The main reduction gear forming processes optimize the structure of the main reduction gear, reduce the consumption of raw materials, improve the utilization rate of the materials, reduce the striking force of forging equipment, reduce the load of a press and prolong the service life of the press.
2. The gear body is arranged between the upper die and the lower die, the upper die is provided with a lower convex part, the lower convex part is provided with a boss, the boss is provided with an inner groove, the lower die is concave, the middle part of the lower die is provided with an upper convex part, the upper die is matched with the lower die, and a cavity for processing the gear body is arranged between the upper die and the lower die.
Drawings
FIG. 1 is a schematic structural view of a gear body according to the present invention;
FIG. 2 is a schematic structural view of the mold release in the present invention;
fig. 3 is a schematic diagram of the present invention after further optimization.
Detailed Description
The invention is further illustrated in conjunction with the figures and the detailed description.
Example 1
The main reduction gear molding process comprises a gear body 1, wherein an opening 3 is formed in the gear body 1, a boss 4 is formed outside the gear body 1, and a groove 5 is formed between the opening 3 and the boss 4.
step, still including the mould 2 of processing gear body 1, be equipped with mould 21 and lower mould 22 in the mould 2, gear body 1 locates between mould 21 and the lower mould 22, be equipped with down convex part 211 in going up mould 21, be equipped with boss 212 on the convex part 211 down, be equipped with inner groovy 213 on the boss 212, lower mould 22 is concave type, the middle part of lower mould 22 is equipped with convex part 221, it cooperatees with lower mould 22 to go up mould 21, is equipped with the cavity 23 that is used for processing gear body 1 between the two.
The lower convex part 211 is provided with a convex block 214, and the convex block 214 is matched with the groove 5.
Example 2
The main reduction gear molding process comprises a gear body 1, wherein an opening 3 is formed in the gear body 1, a boss 4 is formed outside the gear body 1, and a groove 5 is formed between the opening 3 and the boss 4.
step, still including the mould 2 of processing gear body 1, be equipped with mould 21 and lower mould 22 in the mould 2, gear body 1 locates between mould 21 and the lower mould 22, be equipped with down convex part 211 in going up mould 21, be equipped with boss 212 on the convex part 211 down, be equipped with inner groovy 213 on the boss 212, lower mould 22 is concave type, the middle part of lower mould 22 is equipped with convex part 221, it cooperatees with lower mould 22 to go up mould 21, is equipped with the cavity 23 that is used for processing gear body 1 between the two.
In step , the lower mold 22 is in a concave shape, side plates 222 are disposed on both sides of the upper protrusion 221, a storage chamber 223 is disposed below the upper protrusion 221, a supply duct 224 is disposed on both sides of the storage chamber 223, and the upper protrusion 221 and the side plates 222 form a cavity 23.
, the cavity 23 is convex, the supply pipe 224 is connected to the cavity 23, and the supply pipe 224 is provided with a control valve.
, the protrusion 211 is provided with a protrusion 214, and the protrusion 214 is engaged with the groove 5.
In step , the inlet of the storage chamber 223 is connected to the raw material box via a pipe.
Example 3
The main reduction gear molding process comprises a gear body 1, wherein an opening 3 is formed in the gear body 1, a boss 4 is formed outside the gear body 1, and a groove 5 is formed between the opening 3 and the boss 4.
step, still including the mould 2 of processing gear body 1, be equipped with mould 21 and lower mould 22 in the mould 2, gear body 1 locates between mould 21 and the lower mould 22, be equipped with down convex part 211 in going up mould 21, be equipped with boss 212 on the convex part 211 down, be equipped with inner groovy 213 on the boss 212, lower mould 22 is concave type, the middle part of lower mould 22 is equipped with convex part 221, it cooperatees with lower mould 22 to go up mould 21, is equipped with the cavity 23 that is used for processing gear body 1 between the two.
In step , the lower mold 22 is in a concave shape, side plates 222 are disposed on both sides of the upper protrusion 221, a storage chamber 223 is disposed below the upper protrusion 221, a supply duct 224 is disposed on both sides of the storage chamber 223, and the upper protrusion 221 and the side plates 222 form a cavity 23.
, the cavity 23 is convex, the supply pipe 224 is connected to the cavity 23, and the supply pipe 224 is provided with a control valve.
, the protrusion 211 is provided with a protrusion 214, and the protrusion 214 is engaged with the groove 5.
In step , the inlet of the storage chamber 223 is connected to the raw material box via a pipe.
, the main reduction gear is formed by the following steps:
1) coating layers of mould release agent in the cavity (23) of the mould (2);
2): meanwhile, the metal round steel is subjected to intermediate frequency induction heating to form a blank, heat preservation is carried out, the heat preservation temperature is 1100-;
3): then the blank is sent into the storage cavity (223) through a pipeline and is extruded into the cavity (23), and when the cavity (23) is filled with the blank, the control valve is closed;
4): then, upsetting the blank by using an electro-hydraulic hammer, and pressing an upper die (21) and a lower die (22) to form a gear body (1);
5): cooling the die 2 to room temperature, and demolding the gear;
6): after demolding, spheroidizing annealing is carried out in a roller-hearth type continuous nitrogen-based protective atmosphere furnace;
7): shot blasting is carried out for 20min by adopting a shot blasting machine, so that an oxide skin layer and an oxide film on the surface are removed, and the surface roughness is improved;
8): and (3) setting a rolling pressure of 8-16 MPa by using a cold rolling machine for cold rolling for 7-10 s, and setting a diameter-adjusting pressure of 8-12 MPa.
In the embodiment, after the gear body (1) is processed, the surface of the gear body is cleaned, and the specific cleaning mode is as follows:
the method comprises the following steps of (1) carrying out rotary washing on the heavier garbage on the inner wall of a gear body (1) and the surface of a raceway by adopting an automatic motor nylon brush, and then cleaning the tiny garbage by adopting multi-groove channel type ultrasonic waves with a gear water agent cleaning agent as a cleaning medium at the frequency of 30kHz and the power of 1 kW;
and (5) repeatedly cleaning and rinsing for 2-3 times, and finally drying.
Preferably, the main reduction gear is formed by the forming process; the spheroidizing annealing adopts a stepped temperature rise mode to finish the carburizing and spheroidizing annealing of the gear, and specifically comprises the following steps: the furnace temperature is raised to 250 ℃, the furnace temperature is kept at 250 +/-10 ℃, and the heat preservation time is 3 hours; continuously heating to 650 ℃, keeping the furnace temperature at 650 +/-10 ℃ and keeping the temperature for 3 hours; and when the temperature is continuously increased to 890 ℃, dripping 180 drops of methanol and kerosene by two groups of symmetrical drip injectors respectively, wherein 100 drops of methanol are 3.6ml per minute, the dripping is stopped after the dripping time reaches 18 minutes, the furnace temperature is kept at 890 +/-10 ℃, the furnace temperature is kept for 3 hours, the furnace is cooled to 600 ℃, and then the temperature is increased for spheroidization.
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 (9)
- The molding process of the main reduction gears is characterized by comprising a gear body (1), wherein an opening (3) is formed in the gear body (1), a boss (4) is formed in the gear body, and a groove (5) is formed between the opening (3) and the boss (4).
- 2. The main reduction gear of claim 1, wherein: still including mould (2) of processing gear body (1), be equipped with mould (21) and lower mould (22) in mould (2), gear body (1) is located between mould (21) and lower mould (22), be equipped with down convex part (211) in last mould (21), be equipped with boss (212) down on convex part (211), be equipped with inner groovy (213) on boss (212), lower mould (22) are concave type, the middle part of lower mould (22) is equipped with convex part (221), it cooperatees to go up mould (21) and lower mould (22), is equipped with cavity (23) that are used for processing gear body (1) between the two.
- 3. The main reduction gear of claim 2, wherein: the lower die (22) is in a concave shape, the side plates (222) are arranged on two sides of the upper convex portion (221), the material storage cavity (223) is arranged on the lower portion of the upper convex portion (221), the material supply pipelines (224) are arranged on two sides of the material storage cavity (223), and the upper convex portion (221) and the side plates (222) form a cavity (23).
- 4. The main reduction gear of claim 3, wherein: the cavity (23) is convex, the feeding pipeline (224) is communicated with the cavity (23), and a control valve is arranged on the feeding pipeline (224).
- 5. The main reduction gear of claim 3, wherein: and a lug (214) is arranged on the lower convex part (211), and the lug (214) is matched with the groove (5).
- 6. The main reduction gear of claim 3, wherein: the feed inlet of the storage cavity (223) is connected with the raw material box through a pipeline.
- 7. The process for molding a main reduction gear according to claim 1, wherein: the specific forming process is as follows:1) coating layers of mould release agent in the cavity (23) of the mould (2);2): meanwhile, the metal round steel is subjected to intermediate frequency induction heating to form a blank, heat preservation is carried out, the heat preservation temperature is 1100-;3): then the blank is sent into the storage cavity (223) through a pipeline and is extruded into the cavity (23), and when the cavity (23) is filled with the blank, the control valve is closed;4): then, upsetting the blank by using an electro-hydraulic hammer, and pressing an upper die (21) and a lower die (22) to form a gear body (1);5): cooling the mold (2) to room temperature, and demolding the gear;6): after demolding, spheroidizing annealing is carried out in a roller-hearth type continuous nitrogen-based protective atmosphere furnace;7): shot blasting is carried out for 20min by adopting a shot blasting machine, so that an oxide skin layer and an oxide film on the surface are removed, and the surface roughness is improved;8): and (3) setting a rolling pressure of 8-16 MPa by using a cold rolling machine for cold rolling for 7-10 s, and setting a diameter-adjusting pressure of 8-12 MPa.
- 8. The process of molding a main reduction gear according to claim 7, wherein: the specific forming process is as follows: after the gear body (1) is processed, the surface of the gear body is cleaned, and the specific cleaning mode is as follows:the method comprises the following steps of (1) carrying out rotary washing on the heavier garbage on the inner wall of a gear body (1) and the surface of a raceway by adopting an automatic motor nylon brush, and then cleaning the tiny garbage by adopting multi-groove channel type ultrasonic waves with a gear water agent cleaning agent as a cleaning medium at the frequency of 30kHz and the power of 1 kW;and (5) repeatedly cleaning and rinsing for 2-3 times, and finally drying.
- 9. The process of molding a main reduction gear according to claim 7, wherein: in the above molding process; the spheroidizing annealing adopts a stepped temperature rise mode to finish the carburizing and spheroidizing annealing of the gear, and specifically comprises the following steps: the furnace temperature is raised to 250 ℃, the furnace temperature is kept at 250 +/-10 ℃, and the heat preservation time is 3 hours; continuously heating to 650 ℃, keeping the furnace temperature at 650 +/-10 ℃ and keeping the temperature for 3 hours; and when the temperature is continuously increased to 890 ℃, dripping 180 drops of methanol and kerosene by two groups of symmetrical drip injectors respectively, wherein 100 drops of methanol are 3.6ml per minute, the dripping is stopped after the dripping time reaches 18 minutes, the furnace temperature is kept at 890 +/-10 ℃, the furnace temperature is kept for 3 hours, the furnace is cooled to 600 ℃, and then the temperature is increased for spheroidization.
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| CN201910950616.8A CN110732613A (en) | 2019-10-08 | 2019-10-08 | main reduction gear and molding process thereof |
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| CN201910950616.8A CN110732613A (en) | 2019-10-08 | 2019-10-08 | main reduction gear and molding process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112591603A (en) * | 2020-12-10 | 2021-04-02 | 中广核核电运营有限公司 | Domestic ring-hanging open type gear replacing method for in-service unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5803154A (en) * | 1995-12-14 | 1998-09-08 | Honda Giken Kogyo Kabushiki Kaisha | Thixocasting process |
| CN106399818A (en) * | 2016-06-03 | 2017-02-15 | 江苏保捷锻压有限公司 | Liquid-state die forging process for cam shaft gear for automobile engine |
| CN107470533A (en) * | 2017-08-24 | 2017-12-15 | 山东大为齿轮传动有限公司 | A kind of idle pulley processing method and processing assembling die |
| CN110064743A (en) * | 2019-04-30 | 2019-07-30 | 徐州箱桥机械有限公司 | A kind of processing technology of gear |
| CN110102589A (en) * | 2019-04-23 | 2019-08-09 | 河北科技大学 | The processing method and processing unit (plant) of gear |
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2019
- 2019-10-08 CN CN201910950616.8A patent/CN110732613A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5803154A (en) * | 1995-12-14 | 1998-09-08 | Honda Giken Kogyo Kabushiki Kaisha | Thixocasting process |
| CN106399818A (en) * | 2016-06-03 | 2017-02-15 | 江苏保捷锻压有限公司 | Liquid-state die forging process for cam shaft gear for automobile engine |
| CN107470533A (en) * | 2017-08-24 | 2017-12-15 | 山东大为齿轮传动有限公司 | A kind of idle pulley processing method and processing assembling die |
| CN110102589A (en) * | 2019-04-23 | 2019-08-09 | 河北科技大学 | The processing method and processing unit (plant) of gear |
| CN110064743A (en) * | 2019-04-30 | 2019-07-30 | 徐州箱桥机械有限公司 | A kind of processing technology of gear |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112591603A (en) * | 2020-12-10 | 2021-04-02 | 中广核核电运营有限公司 | Domestic ring-hanging open type gear replacing method for in-service unit |
| CN112591603B (en) * | 2020-12-10 | 2023-01-17 | 中广核核电运营有限公司 | Domestic ring-hanging open type gear replacing method for in-service unit |
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