CN101186007B - Production process of large scale gear for big gear ring of excavator - Google Patents
Production process of large scale gear for big gear ring of excavator Download PDFInfo
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- CN101186007B CN101186007B CN2007100098809A CN200710009880A CN101186007B CN 101186007 B CN101186007 B CN 101186007B CN 2007100098809 A CN2007100098809 A CN 2007100098809A CN 200710009880 A CN200710009880 A CN 200710009880A CN 101186007 B CN101186007 B CN 101186007B
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Abstract
The invention discloses a big-size gear manufacturing method. The manufacturing method includes the following steps: a certain quantity of steel is cut and heated to 1100 to 1300 DEG C, and then the steel is stamped into cake-shaped structure; a through hole with the diameter of 50 to 100 mm is punched at the middle part of the cake-shaped steel; the steel is placed on a ring-rolling machine for hole rolling and enlarging to lead the cake-shaped steel to be a ring-shaped billet with the internal diameter of 550 to 580 mm; the ring-shaped billet is placed between an upper mould and a lower mould of a punching die machine for mould-combing and die to get a wheel blank; the wheel blank is shaped in a temperature of 200 to 500 DEG C after overlaps and burrs are removed; the wheel blank is treated in the temperature of 830 to 880 DEG C to lead the hardness to reach HRC 30 to 38; a medium quenching is carried out after the quality is regulated to lead the hardness to reach HRC 50 to 58 and the depth of a quenching layer is 6 to 12 mm; a final processing can be carried out in the end to get a finished gear. The gear has equal strength distribution and long service life.
Description
Technical field
The present invention relates to a kind of gear production process, particularly a kind of production method that is used for the large scale gear of excavator bull gear.
Background technology
Known large scale gear generally adopts forging type to make, because the wheel teeth size on the gear is less and quantity is more, crystallization time, temperature, the pressure of molten steel each gear teeth in cast are distinguished to some extent like this, the intensity of whole gear is inhomogeneous, is easy to when large scale gear turns round under heavy duty like this damage.It as the notification number of on April 7th, 2004 bulletin disclosed a kind of excavator in the Chinese patent of CN2609972, it comprises the digging mechanism of being located on the workbench, workbench connects with the walking mechanism chassis, workbench is installed on the walking mechanism chassis by pivoting support, the hydraulic pressure rotating mechanism is installed between workbench and the chassis, and workbench is provided with control valve and driver's seat.Be provided with the pinion that connects with hydraulic motor below the workbench, be fixed with the bull gear with pinion on the chassis, hydraulic motor connects with control valve by oil circuit, and driver's seat is a rotary seat.In this excavator, just be easy to damage with the bull gear of described pinion, and change this bull gear at every turn and will take a lot of engineering times.
Summary of the invention
The object of the present invention is to provide a kind of production method that is used for the large scale gear of excavator bull gear, the big spoke of prepared service life of gear improves.
The technical solution adopted in the present invention is such: a kind of production method that is used for the large scale gear of excavator bull gear comprises the steps:
1), gets the raw materials ready: cut a certain amount of steel and be placed on and be heated to 1100 ℃～1300 ℃ in the heating furnace, and strike out the pie structure;
2), make base: after step 1), dash the through hole that diameter is 50mm～100mm at pie steel middle part, by this through hole the pie steel are placed then and carry out the spreading reaming on the Ring Rolling Machine, make the pie steel form the annulus steel billet that internal diameter is 550mm～580mm;
3), punch die: continue step 2) after, surplus temperature is inserted at the annulus steel billet more than 1100 ℃ between the patrix and counterdie of punch die machine, patrix and counterdie are carried out the matched moulds punch die make wheel blank;
4), overlap: wheel blank radial outside wall and radially inner side wall that step 3) is made carry out the deburring processing;
5), shaping: the wheel blank behind the overlap is carried out shaping handle under 200 ℃～500 ℃;
6), modifier treatment: carry out tempering after the wheel blank after the shaping is heated to 830 ℃～880 ℃, making its hardness is HRC30～38;
7), heat treatment: the wheel blank after modified is carried out mid frequency induction hardening, and the wheel blank hardness after the quenching is HRC50～58, and depth of hardening is 6mm～12mm;
8), post processing: wheel blank is holed or machined makes the finished product gear at last according to different use occasions.
Aforementioned a kind of production method that is used for the large scale gear of excavator bull gear, described steel are 50Mn, 40Mn
2, a kind of among the 40MnB.
Aforementioned a kind of production method that is used for the large scale gear of excavator bull gear, shaping methods in the described step 5) is that described wheel blank is placed the shaping tooth mould suitable with the finished product gear size, with a drift punching press is carried out in the upper surface of wheel blank and makes wheel blank meet the tolerance of finished product gear.
By adopting the aforementioned techniques scheme, the invention has the beneficial effects as follows: the structure organization of the large scale gear each several part that is used for the excavator bull gear that makes with this process is evenly distributed, and the intensity height reaches more than 3 times of known casting gear service life.
The specific embodiment
Embodiment discloses a kind of production method that is used for the large scale gear of excavator bull gear, comprises the steps:
1), get the raw materials ready: cut the 50MN type round steel of 55Kg, the diameter of round steel is 200mm, places heating furnace to be heated to about 1200 ℃ in this round steel, with pneumatic hammer or die hammer this round steel is beaten into a pie structure then;
2), make base: and then dash the through hole that diameter is 80mm at described pie steel middle part after the step 1), by this through hole the pie steel are placed then and carry out the spreading reaming on the Ring Rolling Machine, make the pie steel form the annulus steel billet that internal diameter is 580mm;
3), punch die: step 2 and then) insert surplus temperature between the patrix and counterdie of punch die machine at the annulus steel billet more than 1100 ℃ afterwards, described patrix and counterdie are respectively equipped with and corresponding upper cavity of finished product gear structure and lower mode cavity, patrix and counterdie are carried out the matched moulds punch die make wheel blank;
4), overlap: the wheel blank that step 3) is made places on the workbench, with one with the suitable overlap foreign steamer of finished product gear shape to the radial outside wall of wheel blank the deburring of swiping handle; Then with one with the suitable overlap axle of finished product gear internal diameter to the deburring processing of swiping of the radially inner side wall of wheel blank;
5), shaping: the wheel blank after the overlap processing is placed the shaping tooth mould suitable with the finished product gear size, with a drift punching press being carried out in the upper surface of wheel blank makes wheel blank meet depth of parallelism, circularity, axiality of the tolerance of finished product gear such as axial two sides etc., the gear temperature is controlled in 200 ℃～500 ℃ scopes during shaping, unsuitable too high, otherwise cause gear tooth deformation easily;
6), modifier treatment: insulation was carried out tempering two hours at 560 ℃ after the wheel blank after the shaping was heated to 870 ℃, and making its hardness is HRC30～38;
7), heat treatment: the wheel blank after modified is carried out mid frequency induction hardening, and the wheel blank hardness after the quenching is HRC58, and depth of hardening is 7mm;
8), post processing: after drilling through fixing hole on the wheel blank, make the finished product gear.
The excavator bull gear that the prepared gear of embodiment can be used as various different models uses or other need adopt the occasion of large scale gear.The steel that are suitable for production method of the present invention in addition also have
40Mn
2, steel such as 40MnB.The technological parameter of each step such as temperature range are more satisfactory scopes for realizing that the object of the invention defined in the specification summary of the invention part, if based on the thinking the same with the present invention, just on individual process parameters, exceed the aforementioned scope that defines, still belong within the scope of institute of the present invention letter lid, the present invention should belong to those skilled in the art according to the confirmable processing technology of corresponding material for treatment process such as some processing step such as modified, mid frequency induction hardening, post processing, overlaps, so will not give unnecessary details.Equipment such as employed pneumatic hammer, die hammer, Ring Rolling Machine, punch die machine belong to the known equipment of this area in above-mentioned technical process, and it can be buied on market easily.
Claims (3)
1. a production method that is used for the large scale gear of excavator bull gear is characterized in that comprising the steps:
1), gets the raw materials ready: cut a certain amount of steel and be placed on and be heated to 1100 ℃～1300 ℃ in the heating furnace, and strike out the pie structure;
2), make base: after step 1), dash the through hole that diameter is 50mm～100mm at pie steel middle part, by this through hole the pie steel are placed then and carry out the spreading reaming on the Ring Rolling Machine, make the pie steel form the annulus steel billet that internal diameter is 550mm～580mm;
3), punch die: continue step 2) after, surplus temperature is inserted at the annulus steel billet more than 1100 ℃ between the patrix and counterdie of punch die machine, patrix and counterdie are carried out the matched moulds punch die make wheel blank;
4), overlap: wheel blank radial outside wall and radially inner side wall that step 3) is made carry out the deburring processing;
5), shaping: the wheel blank behind the overlap is carried out shaping handle under 200 ℃～500 ℃;
6), modifier treatment: carry out tempering after the wheel blank after the shaping is heated to 830 ℃～880 ℃, making its hardness is HRC30～38;
7), heat treatment: the wheel blank after modified is carried out mid frequency induction hardening, and the wheel blank hardness after the quenching is HRC50～58, and depth of hardening is 6mm～12mm;
8), post processing: wheel blank is holed or machined makes the finished product gear at last according to different use occasions.
2. a kind of production method that is used for the large scale gear of excavator bull gear according to claim 1 is characterized in that: described steel are 50Mn, 40Mn
2, a kind of among the 40MnB.
3. a kind of production method that is used for the large scale gear of excavator bull gear according to claim 2, it is characterized in that: the shaping methods in the described step 5) is that described wheel blank is placed the shaping tooth mould suitable with the finished product gear size, with a drift punching press is carried out in the upper surface of wheel blank and makes wheel blank meet the tolerance of finished product gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100098809A CN101186007B (en) | 2007-11-26 | 2007-11-26 | Production process of large scale gear for big gear ring of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100098809A CN101186007B (en) | 2007-11-26 | 2007-11-26 | Production process of large scale gear for big gear ring of excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101186007A CN101186007A (en) | 2008-05-28 |
| CN101186007B true CN101186007B (en) | 2010-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100098809A Active CN101186007B (en) | 2007-11-26 | 2007-11-26 | Production process of large scale gear for big gear ring of excavator |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898297B (en) * | 2010-04-15 | 2011-09-07 | 南通振华重型装备制造有限公司 | Manufacturing method of large-size welding type carburizing and quenching gear |
| CN102357615B (en) * | 2011-08-16 | 2014-02-12 | 东莞精锐电器五金有限公司 | Gear hot-stamping equipment and gear hot-stamping method |
| CN102357784B (en) * | 2011-09-14 | 2013-06-05 | 中信重工机械股份有限公司 | Manufacturing process for high-hardness large-diameter quarter combined big gear ring |
| CN102729017A (en) * | 2012-06-27 | 2012-10-17 | 江苏金源锻造股份有限公司 | Method for producing locomotive gear forgings |
| CN103212959A (en) * | 2013-02-24 | 2013-07-24 | 谢泽波 | Method for forming toothed block |
| CN104690519B (en) * | 2013-12-10 | 2018-03-13 | 全球传动科技股份有限公司 | The manufacture method of screw rod |
| CN110499416A (en) * | 2019-08-29 | 2019-11-26 | 安徽港泰机械制造集团有限公司 | A kind of heat treatment process of wheel |
| CN113814679B (en) * | 2021-09-24 | 2023-06-30 | 江苏裕隆锻造有限公司 | Machining method for overcoming crack defect of 50Mn rotary gear ring |
| CN114871695B (en) * | 2022-04-24 | 2024-02-09 | 中国科学院金属研究所 | M50 steel bearing ring, preparation method thereof and bearing |
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2007
- 2007-11-26 CN CN2007100098809A patent/CN101186007B/en active Active
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| CN101186007A (en) | 2008-05-28 |
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Effective date of registration: 20211221 Address after: 362000 No. 1, Taikang Road, Xiantang community, Changtai street, Licheng District, Quanzhou City, Fujian Province Patentee after: QUANZHOU JIANGXIN MACHINERY Co.,Ltd. Address before: 362000, Licheng District, Fujian City, Quanzhou Province Jiangnan street Xintang Industrial Zone Quanzhou Jiang Xin Machinery Co., Ltd. Patentee before: Chen Zhongming |
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