CN108994248A - A kind of gear forging technique - Google Patents
A kind of gear forging technique Download PDFInfo
- Publication number
- CN108994248A CN108994248A CN201811078674.8A CN201811078674A CN108994248A CN 108994248 A CN108994248 A CN 108994248A CN 201811078674 A CN201811078674 A CN 201811078674A CN 108994248 A CN108994248 A CN 108994248A
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- CN
- China
- Prior art keywords
- blank
- degrees celsius
- forging
- heated
- jumping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
Abstract
Present invention mainly discloses a kind of gear forging technique, technical solutions: the following steps are included: (1) material selects；(2) pre-processing；(3) it forges for the first time；(4) blanking；(5) One-time forgings, including jumping-up, pulling and jumping-up again；(6) second fire forgings, including octagonal, smooth, round as a ball, punching, reaming, Qing Jiao；(7) annealing, finishing；(8) detection storage.Process flow of the invention is easy to operate, high production efficiency, and the equipment tonnage of investment is small, and raw material waste is few, and cost reduces, and gear structure obtained is close, stablizes, and quality is good, long service life.
Description
Technical field
The present invention relates to gear forging technical field, especially a kind of gear forging technique.
Background technique
Prior art middle gear is very widely used, applies structural stability and size so as to gear on a large scale
Accuracy requires very high.The mode of existing forging gear generallys use traditional forging technology, manufactures from blank to finished product
Process it is many and diverse, low efficiency, waste is big, and utilization rate of raw materials is low, and equipment tonnage is larger, investment it is at high cost, and make
The gear hardness obtained is bad, short texture, low precision, and service life is low.
Summary of the invention
In view of the deficienciess of the prior art, the present invention provides a kind of gear forging technique, raw material waste is few, cost
It reduces, gear structure obtained is close, and quality is good, long service life.
In order to achieve the above object, the present invention is achieved through the following technical solutions:
A kind of gear forging technique, comprising the following steps:
(1) material selects: selecting vacuum outgas+refining steel ingot as raw material, guarantees harden ability, degree of purity and the crystalline substance of steel
Grain refinement；
(2) pre-processing: the surface of steel ingot being polished, is polished, tumbling, oil removal treatment, and the surface for removing steel ingot lacks
It falls into；
(3) it forges for the first time: the steel ingot of removal surface defect in step (2) is subjected to axial pulling forging using Single arm
It makes, entire steel ingot is drawn into specified blank specification, the blank after then forging first time is placed in nitrogen atmosphere protection
First time heat treatment is carried out in the heating furnace of non-oxidation, heating temperature is 1100~1200 degrees Celsius, and heating time is 3~4
Minute, room temperature is naturally cooled to later；
(4) blank for obtaining step (3) is according to technique weight sawing；
(5) One-time forgings:
A) certain specification and the blank of weight are heated uniformly to using three sections of heatings not less than 1100 degrees Celsius, and protected
Temperature 3~4 hours；Then the blank after heating is placed in defined heading die, blank is subjected to preliminary upsetting using Single arm
Slightly, blank is depressed into section and is square by reduction ratio 20%, reduces blank height, increases blank sectional area, and upset ratio is
0.4~0.6；
B) then the blank after jumping-up is heated again, is heated to 1160~1230 degrees Celsius, keep the temperature 3~4 hours, wide anvil
Flat pulling is walked, forms the square section that area reduces, and increase charge length, pulling is than being 1.2~1.4；
C) blank after pulling is subjected to jumping-up using Single arm again, each volume under pressure is 15%, and blank revolves after stopping forging
Turn 90 °, then push in the same way, form square section, reduces blank height, while increasing blank sectional area, upsetting
Thick ratio is 0.4~0.6；
D) blank of jumping-up is carried out round as a ball, then blank is put into heating furnace and melts down heating, it is heated to 1200~
1300 degrees Celsius, heat preservation took out blank after 2~5 hours；
(6) second fire forgings:
A) blank is fallen using Single arm octagonal；
B) blank obtained to a) step carries out finish forge again, is heated to 1110~1150 degrees Celsius, controls total forging ratio
> 5, then flat blank section, removes Burr removal and clout, then round as a ball；
C) it is punched out processing using center of the formed punch to blank, punching goes out to run through the axis hole of entire blank, then utilize
Reamer carries out expanding treatment to the hole gone out；
D) clear angle；
(7) above-mentioned blank is placed in annealing furnace and is made annealing treatment, then finishing tooth form；
(8) ultrasonic examination inspection, Mechanics Performance Testing, end product storage.
The present invention is further arranged to: in the material selection process of step (1), forging is not more than with Ca content in steel
10ppm does not allow to carry out Ca deoxidation treatment.
The present invention is further arranged to: the grinding depth in step (2) is no more than the 1.5% of effective dimensions, and polishing is deep
Degree is wide than being less than 1:6.
The present invention is further arranged to: in the step c of step (6), when reaming and punching are handled, being all made of 0.6 megapascal
Fresh breeze preformed body is cleared up by blower, remove the scrap generated in punching and reaming procedure.
The present invention is further arranged to: in step (7), annealing process is that blank is put into annealing furnace to take the photograph according to 30
Family name's degree/hour speed heats, until being heated to 900 degrees Celsius, 2 hours is kept the temperature, then according to 30 degrees Celsius/hour
Speed is cooling, is cooled to 400~450 degrees Celsius.
The present invention is further arranged to: the type of cooling be it is air-cooled, using air blower, air quantity 12000m3~14000m3, wind
Fan revolving speed is 1400r/min~1600r/min.
The present invention is further arranged to: finishing temperature is not less than 780 degrees Celsius in step (7).
The present invention is further arranged to: the Single arm used when forging is 4/8t Single arm.
The present invention has the beneficial effect that
Process flow of the invention is easy to operate, high production efficiency, and the equipment tonnage of investment is small, and raw material waste is few,
Cost reduces, and gear structure obtained is close, stablizes, and quality is good, long service life.
Specific embodiment
A kind of gear forging technique, comprising the following steps:
(1) material selects: selecting vacuum outgas+refining steel ingot as raw material, guarantees harden ability, degree of purity and the crystalline substance of steel
Grain refinement；Ca content is not more than 10ppm in forging steel, does not allow to carry out Ca deoxidation treatment.
(2) pre-processing: the surface of steel ingot being polished using grinding wheel, is polished, using roller burnishing knife carry out rolling processing,
The surface treatment such as oil removing is carried out using degreaser, removes the surface defect of steel ingot；Grinding depth is no more than effective dimensions
1.5%, grinding depth is wide than being less than 1:6.
(3) it forges for the first time: the steel ingot of removal surface defect in step (2) is subjected to axial pulling using 4/8t Single arm
Entire steel ingot, is drawn into specified blank specification by forging, and material specification is 650mm* wide 650mm* high 988mm, then by the
Blank after primary forging is placed in the heating furnace of the non-oxidation of nitrogen atmosphere protection and carries out first time heat treatment, heating temperature
It is 1100~1200 degrees Celsius, heating time is 3~4 minutes, naturally cools to room temperature later；
(4) blank for obtaining step (3) is according to technique weight sawing；
(5) One-time forgings:
A) certain specification and the blank of weight are heated uniformly to using three sections of heatings not less than 1100 degrees Celsius, and protected
Temperature 3~4 hours；Then the blank after heating is placed in defined heading die, blank is subjected to preliminary upsetting using Single arm
Slightly, blank is depressed into the square that section is 870mm*870mm, is highly 550mm, reduces blank height by reduction ratio 20%,
Increase blank sectional area, upset ratio is 0.4~0.6；B) then the blank after jumping-up is heated again, is heated to 1160~1230
Degree Celsius, 3~4 hours are kept the temperature, wide anvil walks flat pulling, and Formation cross-section area is the square section of 770mm*770mm, and increases
Add charge length, length 700mm, pulling is than being 1.2~1.4；
C) blank after pulling is subjected to jumping-up using Single arm again, each volume under pressure is 15%, and blank revolves after stopping forging
Turn 90 °, then push in the same way, form the square section of 1000mm*1000mm, be highly 400mm, reduces blank
Highly, while increasing blank sectional area, upset ratio is 0.4~0.6；It is pulled out in time when discovery folds in upsetting process after putting down again
Upsetting.
D) blank of jumping-up is carried out round as a ball, then blank is put into heating furnace and melts down heating, it is heated to 1200~
1300 degrees Celsius, heat preservation took out blank after 2~5 hours；
(6) second fire forgings:
A) blank is fallen into the illiciumverum of 1120mm using Single arm, is highly 400mm；
B) blank obtained to a) step carries out finish forge again, is heated to 1110~1150 degrees Celsius, controls total forging ratio
> 5, then flat blank section, removes Burr removal and clout, then round as a ball；
C) it is punched out processing using center of the formed punch to blank, punching goes out to run through the axis hole of entire blank, then utilize
Reamer carries out expanding treatment to the hole gone out；When reaming and punching are handled, the fresh breeze for being all made of 0.6 megapascal passes through blower pair
Preformed body is cleared up, and the scrap generated in punching and reaming procedure is removed.
D) clear angle；
(7) above-mentioned blank is placed in annealing furnace and is made annealing treatment, added according to the speed of 30 degrees Celsius/hour
Heat keeps the temperature 2 hours until being heated to 900 degrees Celsius, then cooling according to the speed of 30 degrees Celsius/hour, it is cooled to 400~
450 degrees Celsius；The type of cooling be it is air-cooled, using air blower, air quantity 12000m3~14000m3, rotation speed of the fan 1400r/min
~1600r/min；Then finishing tooth form, temperature are not less than 780 degrees Celsius.
(8) ultrasonic examination inspection, Mechanics Performance Testing, end product storage.
In the present solution, selecting cutting stock weight for 3275kg, core material weight 35kg, technique feed consumption 110kg, obtained forging are cut off
Part weight is 3130kg.Process flow of the invention is easy to operate, high production efficiency, and the equipment tonnage of investment is small, raw material damage
Consumption is few, and cost reduces, and gear structure obtained is close, stablizes, and quality is good, precision is high, long service life.
Above-described embodiment is only used for illustrating inventive concept of the invention, rather than the restriction to rights protection of the present invention,
It is all to be made a non-material change to the present invention using this design, protection scope of the present invention should all be fallen into.
Claims (8)
1. a kind of gear forging technique, it is characterised in that: the following steps are included:
(1) material selects: selecting vacuum outgas+refining steel ingot as raw material, guarantees that harden ability, degree of purity and the crystal grain of steel are thin
Change；
(2) pre-processing: the surface of steel ingot is polished, is polished, tumbling, oil removal treatment, removes the surface defect of steel ingot；
(3) it forges for the first time: the steel ingot of removal surface defect in step (2) is subjected to axial pulling forging using Single arm, it will
Entire steel ingot is drawn into specified blank specification, and the blank after then forging first time is placed in the non-oxidation of nitrogen atmosphere protection
Heating furnace in carry out first time heat treatment, heating temperature be 1100~1200 degrees Celsius, heating time be 3~4 minutes, it
After naturally cool to room temperature；
(4) blank for obtaining step (3) is according to technique weight sawing；
(5) One-time forgings:
A) certain specification and the blank of weight are heated uniformly to using three sections of heatings not less than 1100 degrees Celsius, and keep the temperature 3
~4 hours；Then the blank after heating is placed in defined heading die, blank is subjected to preliminary jumping-up using Single arm,
Reduction ratio is 20%, and blank is depressed into section and is square, reduce blank height, increase blank sectional area, upset ratio be 0.4~
0.6；
B) then the blank after jumping-up is heated again, is heated to 1160~1230 degrees Celsius, keep the temperature 3~4 hours, wide anvil is walked flat
Side's pulling forms the square section that area reduces, and increases charge length, and pulling is than being 1.2~1.4；
C) blank after pulling is subjected to jumping-up using Single arm again, each volume under pressure is 15%, and blank rotates after stopping forging
90 °, then push in the same way, square section is formed, reduces blank height, while increasing blank sectional area, jumping-up
Than being 0.4~0.6；
D) the blank progress of jumping-up is round as a ball, then blank is put into heating furnace and melts down heating, is heated to 1200~1300
Degree Celsius, heat preservation took out blank after 2~5 hours；
(6) second fire forgings:
A) blank is fallen using Single arm octagonal；
B) blank obtained to a) step carries out finish forge again, is heated to 1110~1150 degrees Celsius, controls total forging ratio > 5,
Then Burr removal and clout are removed in flat blank section, then round as a ball；
C) it is punched out processing using center of the formed punch to blank, punching goes out to run through the axis hole of entire blank, then utilizes reaming
It bores and expanding treatment is carried out to the hole gone out；
D) clear angle；
(7) above-mentioned blank is placed in annealing furnace and is made annealing treatment, then finishing tooth form；
(8) ultrasonic examination inspection, Mechanics Performance Testing, end product storage.
2. a kind of gear forging technique according to claim 1, it is characterised in that: the material selection process in step (1)
In, Ca content is not more than 10ppm in forging steel, does not allow to carry out Ca deoxidation treatment.
3. a kind of gear forging technique according to claim 1, it is characterised in that: the grinding depth in step (2) is not
More than the 1.5% of effective dimensions, grinding depth is wide than being less than 1:6.
4. a kind of gear forging technique according to claim 1, it is characterised in that: in the step c of step (6), reaming
When with punching processing, the fresh breeze for being all made of 0.6 megapascal clears up preformed body by blower, removes punching and reaming procedure
The scrap of middle generation.
5. a kind of gear forging technique according to claim 1, it is characterised in that: in step (7), annealing process is will
Blank is put into annealing furnace and is heated according to the speed of 30 degrees Celsius/hour, until being heated to 900 degrees Celsius, heat preservation 2 is small
When, it is then cooling according to the speed of 30 degrees Celsius/hour, it is cooled to 400~450 degrees Celsius.
6. a kind of gear forging technique according to claim 5, it is characterised in that: the type of cooling be it is air-cooled, using air blast
Machine, air quantity 12000m3~14000m3, rotation speed of the fan is 1400r/min~1600r/min.
7. a kind of gear forging technique according to claim 1, it is characterised in that: finishing temperature is not small in step (7)
In 780 degrees Celsius.
8. a kind of gear forging technique according to claim 1, it is characterised in that: the Single arm used when forging is 4/8t
Single arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811078674.8A CN108994248A (en) | 2018-09-17 | 2018-09-17 | A kind of gear forging technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811078674.8A CN108994248A (en) | 2018-09-17 | 2018-09-17 | A kind of gear forging technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108994248A true CN108994248A (en) | 2018-12-14 |
Family
ID=64592525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811078674.8A Pending CN108994248A (en) | 2018-09-17 | 2018-09-17 | A kind of gear forging technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108994248A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449544A (en) * | 2019-08-16 | 2019-11-15 | 建龙北满特殊钢有限责任公司 | A kind of flat cogging improves the method for quality control inside forging material |
| CN111496155A (en) * | 2020-04-28 | 2020-08-07 | 河南中原特钢装备制造有限公司 | Forging method for enhancing compaction effect of 42CrMo continuous casting billet |
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|---|---|---|---|---|
| CN101780515A (en) * | 2009-12-23 | 2010-07-21 | 青岛三星精锻齿轮有限公司 | Process for precisely forging triple gear of dual-drive tandem |
| CN104668433A (en) * | 2015-02-03 | 2015-06-03 | 江苏金源锻造股份有限公司 | Big gear forging process |
| CN104826980A (en) * | 2015-02-03 | 2015-08-12 | 江苏金源锻造股份有限公司 | Forging process of gear ring |
| CN104923708A (en) * | 2015-06-09 | 2015-09-23 | 柳州科尔特锻造机械有限公司 | Method for forging and producing gear ring |
| CN106040955A (en) * | 2016-08-24 | 2016-10-26 | 江苏金源高端装备股份有限公司 | Forging process of gear shaft |
| CN106541064A (en) * | 2015-09-22 | 2017-03-29 | 首都航天机械公司 | A kind of hammer cogging process of super large-scale aluminium alloy ingot casting |
-
2018
- 2018-09-17 CN CN201811078674.8A patent/CN108994248A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780515A (en) * | 2009-12-23 | 2010-07-21 | 青岛三星精锻齿轮有限公司 | Process for precisely forging triple gear of dual-drive tandem |
| CN104668433A (en) * | 2015-02-03 | 2015-06-03 | 江苏金源锻造股份有限公司 | Big gear forging process |
| CN104826980A (en) * | 2015-02-03 | 2015-08-12 | 江苏金源锻造股份有限公司 | Forging process of gear ring |
| CN104923708A (en) * | 2015-06-09 | 2015-09-23 | 柳州科尔特锻造机械有限公司 | Method for forging and producing gear ring |
| CN106541064A (en) * | 2015-09-22 | 2017-03-29 | 首都航天机械公司 | A kind of hammer cogging process of super large-scale aluminium alloy ingot casting |
| CN106040955A (en) * | 2016-08-24 | 2016-10-26 | 江苏金源高端装备股份有限公司 | Forging process of gear shaft |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449544A (en) * | 2019-08-16 | 2019-11-15 | 建龙北满特殊钢有限责任公司 | A kind of flat cogging improves the method for quality control inside forging material |
| CN111496155A (en) * | 2020-04-28 | 2020-08-07 | 河南中原特钢装备制造有限公司 | Forging method for enhancing compaction effect of 42CrMo continuous casting billet |
| CN111496155B (en) * | 2020-04-28 | 2022-01-07 | 河南中原特钢装备制造有限公司 | Forging method for enhancing compaction effect of 42CrMo continuous casting billet |
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Application publication date: 20181214 |