CN113787316B - High-strength impact-resistant integrally-formed bevel gear and positioning processing method - Google Patents
High-strength impact-resistant integrally-formed bevel gear and positioning processing method Download PDFInfo
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- CN113787316B CN113787316B CN202111154188.1A CN202111154188A CN113787316B CN 113787316 B CN113787316 B CN 113787316B CN 202111154188 A CN202111154188 A CN 202111154188A CN 113787316 B CN113787316 B CN 113787316B
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- bevel gear
- temperature
- processing method
- positioning
- strength impact
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- 238000003672 processing method Methods 0.000 title claims description 11
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 3
- 238000005728 strengthening Methods 0.000 claims description 21
- 238000005507 spraying Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000005422 blasting Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000005255 carburizing Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005480 shot peening Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
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- 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
- F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Gears, Cams (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to machining, in particular to a high-strength impact-resistant integrally-formed bevel gear and a positioning machining method. The invention adopts the modes of raising the temperature and then cooling down, raising the temperature and then cooling down again, and can enhance the density of the blank, and in addition, the gear shaft surface, the bevel gear surface and the round chamfer angle are correspondingly treated, so that the mechanical strength of the integrally formed bevel gear is improved.
Description
Technical Field
The invention relates to machining, in particular to a high-strength impact-resistant integrally-formed bevel gear and a positioning machining method.
Background
Bevel gears are used to transfer motion and power between two intersecting axes, and in a typical machine, the angle of intersection between two axes of a bevel gear is equal to 90 degrees, or may be different from 90 degrees. Like a cylindrical gear, bevel gears have an indexing cone, an addendum cone, a dedendum cone, and a base cone. The cone has a large end and a small end, and the circles corresponding to the large end are respectively called a reference circle, a tooth top circle, a tooth root circle and a base circle. The existing bevel gears can be processed in a split mode, and are also integrally formed, namely the gear shaft and the bevel gear are integrally formed, but the integral size of the integrally formed gear shaft and the integrated bevel gear is large, the mechanical property requirement is high, and particularly the joint of the gear shaft and the bevel gear needs strengthening treatment.
Disclosure of Invention
The invention aims to provide a high-strength impact-resistant integrally-formed bevel gear and a positioning machining side, so as to solve the problem that the strength of the existing integrally-formed bevel gear needs to be improved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a positioning and processing method of a high-strength impact-resistant integrally-formed bevel gear comprises the following steps:
s1, blank processing: normalizing the blank material to be heated to more than 900 ℃, preserving heat in protective gas for 3 hours, cooling to room temperature, heating to 500-600 ℃, preserving heat in protective gas for 3 hours, and cooling to room temperature;
s2, rough turning: the blank skip is subjected to rough shape of a gear shaft and a bevel gear, is subjected to normalizing and heating to 950 ℃, is kept at the temperature for 3 hours, is cooled to room temperature, is heated to 650 ℃, is kept at the temperature for 3 hours, and is cooled to the room temperature;
s3, finish turning: rough turning, fine turning to the size of a finished product, and turning round chamfers on two sides of the joint of the bevel gear and the gear shaft;
s4, strengthening treatment: spraying strengthening powder containing C, cr, ce and Fe elements on the surface of the gear shaft; performing shot blasting treatment on the surface of the bevel gear by adopting iron sand; and an anti-carburizing layer is arranged at the round chamfer for strengthening.
Preferably, the radius of the round chamfer at the two sides of the joint of the bevel gear and the gear shaft is 1/6 of the length of the bevel gear.
Preferably, in the step of S4 strengthening treatment, the ratio of C, cr to Ce element is 1:20:5.
Preferably, in the step of S4 strengthening treatment, strengthening powder is sprayed on the surface of the gear shaft under the conditions of voltage of 30V, current of 220A, spraying distance of 80-100mm, spraying temperature of 650-700 ℃ and compressed air pressure of 0.8 MPa.
Preferably, the shot peening temperature is 550 to 600 ℃.
Preferably, in the reinforcement treatment of the carburized layer, the temperature is maintained at 900 to 950 ℃ and the temperature is kept for 8 hours or more.
Preferably, in the step of S4 strengthening treatment, an anti-carburized layer is first set for strengthening treatment, and then the surface of the gear shaft is sprayed; and then the round chamfer is provided with an anti-carburization layer for strengthening.
The high-strength impact-resistant integrated bevel gear is formed by adopting the positioning processing method of any one of the high-strength impact-resistant integrated bevel gears.
Compared with the prior art, the invention has at least one of the following beneficial effects:
the invention adopts the modes of raising the temperature and then cooling down, raising the temperature and then cooling down again, and can enhance the density of the blank, and in addition, the gear shaft surface, the bevel gear surface and the round chamfer angle are correspondingly treated, so that the mechanical strength of the integrally formed bevel gear is improved.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The following examples are illustrative of several embodiments.
Example 1:
a positioning and processing method of a high-strength impact-resistant integrally-formed bevel gear comprises the following steps:
s1, blank processing: normalizing the blank material to be heated to more than 900 ℃, preserving heat in protective gas for 3 hours, cooling to room temperature, heating to 500-600 ℃, preserving heat in protective gas for 3 hours, and cooling to room temperature; the blank density can be improved in the step, so that the hardness is improved, air is stopped, and the hardness of the bevel gear produced by the treatment in the protective gas can be improved by about 8-12% compared with that produced by the bevel gear produced by the treatment in the air.
S2, rough turning: the blank skip is subjected to rough shape of a gear shaft and a bevel gear, is subjected to normalizing and heating to 950 ℃, is kept at the temperature for 3 hours, is cooled to room temperature, is heated to 650 ℃, is kept at the temperature for 3 hours, and is cooled to the room temperature; normalizing is carried out after rough turning, so that the density of the material is more uniform.
S3, finish turning: rough turning and finish turning to the size of a finished product, turning round chamfers on two sides of the joint of the bevel gear and the gear shaft, wherein the radius of the round chamfers on two sides of the joint of the bevel gear and the gear shaft is 1/6 of the length of the bevel gear, so that the stress of the bevel gear can be reduced, and the strength of the bevel gear is further enhanced through chamfering;
s4, strengthening treatment: and (3) spraying strengthening powder containing C, cr, ce and Fe on the surface of the gear shaft, wherein the proportion of C, cr to Ce is 1:20:5, and in the link, specifically, spraying the strengthening powder on the surface of the gear shaft under the conditions of voltage of 30V, current of 220A, spraying distance of 80-100mm, spraying temperature of 650-700 ℃ and compressed air pressure of 0.8 MPa. C. Cr and Ce elements can eliminate cracks in the gear shaft, refine the structure and improve the strength. Performing shot blasting treatment on the surface of the bevel gear by adopting iron sand, wherein the shot blasting treatment temperature is 550-600 ℃; an anti-carburizing layer is arranged at the round chamfer, the strengthening temperature is kept at 900-950 ℃ and the temperature is kept for more than 8 hours. In the step, the reinforcement treatment of the anti-carburized layer is preferably performed firstly, then the surface of the gear shaft is sprayed, and the reinforcement of the anti-carburized layer is performed at the round chamfer angle, because the temperature adopted in the three steps is from high to low, the reinforcement layer formed by each link cannot be modified by the proceeding of the next link. Finally, the high-strength impact-resistant integrally-formed bevel gear is manufactured.
Reference in the specification to a number of illustrative embodiments means that a particular structure described in connection with the embodiments is included in at least one embodiment described generally herein. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, while a structure is described in connection with any one embodiment, it is intended that such a structure be implemented in connection with other embodiments within the scope of the invention.
Claims (5)
1. A positioning and processing method for a high-strength impact-resistant integrated bevel gear is characterized by comprising the following steps of: the method comprises the following steps:
s1, blank processing: normalizing the blank material to be heated to more than 900 ℃, preserving heat in protective gas for 3 hours, cooling to room temperature, heating to 500-600 ℃, preserving heat in protective gas for 3 hours, and cooling to room temperature;
s2, rough turning: the blank skip is subjected to rough shape of a gear shaft and a bevel gear, is subjected to normalizing and heating to 950 ℃, is kept at the temperature for 3 hours, is cooled to room temperature, is heated to 650 ℃, is kept at the temperature for 3 hours, and is cooled to the room temperature;
s3, finish turning: rough turning, fine turning to the size of a finished product, and turning round chamfers on two sides of the joint of the bevel gear and the gear shaft;
s4, strengthening treatment: spraying strengthening powder containing C, cr, ce and Fe elements on the surface of the gear shaft; c. The ratio of Cr to Ce is 1:20:5; spraying the strengthening powder on the surface of the gear shaft under the conditions of voltage 30V, current 220A, spraying distance 80-100mm, spraying temperature 650-700 ℃ and compressed air pressure 0.8 MPa; performing shot blasting treatment on the surface of the bevel gear by adopting iron sand; and (3) setting an anti-carburizing layer at the round chamfer for strengthening, keeping the temperature at 900-950 ℃ and preserving heat for more than 8 hours.
2. The positioning and processing method for the high-strength impact-resistant integrated bevel gear, which is characterized by comprising the following steps of: the radius of the round chamfer at the two sides of the joint of the bevel gear and the gear shaft is 1/6 of the length of the bevel gear.
3. The positioning and processing method for the high-strength impact-resistant integrated bevel gear, which is characterized by comprising the following steps of: the temperature of the shot blasting treatment is 550-600 ℃.
4. The positioning and processing method for the high-strength impact-resistant integrated bevel gear according to claim 3, wherein the positioning and processing method is characterized by comprising the following steps of: in the step of S4 strengthening treatment, an anti-carburization layer is firstly arranged for strengthening treatment, and then the surface of the gear shaft is sprayed; and then the round chamfer is provided with an anti-carburization layer for strengthening.
5. A high-strength impact-resistant integrally formed bevel gear manufactured by the positioning processing method of the high-strength impact-resistant integrally formed bevel gear according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111154188.1A CN113787316B (en) | 2021-09-29 | 2021-09-29 | High-strength impact-resistant integrally-formed bevel gear and positioning processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111154188.1A CN113787316B (en) | 2021-09-29 | 2021-09-29 | High-strength impact-resistant integrally-formed bevel gear and positioning processing method |
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| Publication Number | Publication Date |
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| CN113787316A CN113787316A (en) | 2021-12-14 |
| CN113787316B true CN113787316B (en) | 2024-01-09 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804548B (en) * | 2010-04-15 | 2011-05-04 | 南通振华重型装备制造有限公司 | Manufacturing method of integral herringbone gear shaft |
| CN105081713B (en) * | 2014-05-15 | 2017-10-17 | 重庆智展齿轮传动有限公司 | The processing method of integral type bevel gear |
| CN107052728B (en) * | 2017-02-13 | 2018-10-30 | 江苏亿鑫齿轮制造有限公司 | A kind of manufacturing process applied to bevel gear shaft |
| CN106623934B (en) * | 2017-03-03 | 2019-11-05 | 大族激光科技产业集团股份有限公司 | SLM shaping steel die has the post-processing approach of blank and the preparation method of SLM shaping steel die tool |
-
2021
- 2021-09-29 CN CN202111154188.1A patent/CN113787316B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| 彭成红.《机械工程材料综合实验》.华南理工大学出版社,2017,第68-69页. * |
| 袁晓静，查柏林.《特种润滑涂层构建理论与技术》.国防工业出版社,2021,第131-132页. * |
| 西安公路学院.齿轮的热处理.《汽车零件制配工艺学》.1962, * |
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Effective date of registration: 20231214 Address after: No. 1 Dongfeng Village, Jiangbei District, Chongqing, 400000 Applicant after: Chongqing Zhengfenghui Machinery Manufacturing Co.,Ltd. Address before: 312400 xiashitou, Sanjie Town, Shengzhou City, Shaoxing City, Zhejiang Province (next to the traffic police team) Applicant before: Shengzhou Boyi Machinery Co.,Ltd. |
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