CN112276500A - Method for processing small-modulus sector worm gear - Google Patents
Method for processing small-modulus sector worm gear Download PDFInfo
- Publication number
- CN112276500A CN112276500A CN202011121531.8A CN202011121531A CN112276500A CN 112276500 A CN112276500 A CN 112276500A CN 202011121531 A CN202011121531 A CN 202011121531A CN 112276500 A CN112276500 A CN 112276500A
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- CN
- China
- Prior art keywords
- worm gear
- gear
- furnace
- tempering
- blank
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000005496 tempering Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000005121 nitriding Methods 0.000 claims abstract description 14
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 13
- 238000004321 preservation Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000010791 quenching Methods 0.000 claims abstract description 11
- 230000000171 quenching effect Effects 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000007670 refining Methods 0.000 claims abstract description 5
- 239000004519 grease Substances 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000035882 stress Effects 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 238000007689 inspection Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a method for processing a small-modulus fan-shaped worm gear, which comprises the following process steps: preparing materials, quenching and tempering, refining a gear blank, aging treatment, gear making, soft nitriding treatment, inspection and warehousing. The soft nitriding treatment is to clean the surface of the worm gear, clean grease on the surface processed in the previous working procedure, put the worm gear into a nitriding furnace, heat the worm gear to 550 +/-10 ℃, preserve heat for 140 +/-20 min, and introduce ammonia gas and decompose the ammonia gas in the heat preservation process; and after the heat preservation is finished, stopping heating, cooling along with the furnace to 400-380 ℃, and opening the furnace to carry out oil cooling to the room temperature. The invention adopts alloy steel to replace copper material used by the conventional worm gear, and simultaneously improves the wear resistance of the worm gear by a surface heat treatment method, thereby achieving the purposes of reducing the cost, lightening the weight of the worm gear and improving the wear resistance of the worm gear.
Description
Technical Field
The invention relates to a method for processing a small-modulus fan-shaped worm gear, and belongs to the technical field of machining.
Background
The worm gear and worm transmission is used for transmitting the motion between two shafts which are staggered in space, and is widely used in the fields of household appliances, automobiles, aerospace and the like. With the continuous expansion of the application field, the deflection transmission mechanisms are frequently used, and the deflection mechanisms have the characteristics that the worm wheel does not perform full circular motion and only rotates forwards and backwards on a specific section of circular arc, so that the heavy requirements on the weight of products are met in the application fields of aerospace, unmanned aerial vehicles and the like, mechanical parts are reduced as much as possible on the premise of not influencing the performance, and the small-modulus fan-shaped worm wheel with a compact structure is frequently used.
In the transmission of worm gear, the sliding speed is higher, and the wearing failure easily appears, for avoiding this kind of condition, often adopt the bronze that the wearability is good as the worm wheel material. Although copper worm gears are wear resistant, the density of the material is high and the requirement for lubricating oil is also high, resulting in higher cost.
Disclosure of Invention
The invention aims to: the machining method of the small-modulus sector worm gear is provided to meet the requirements of light weight and excellent wear resistance of the small-modulus sector worm gear and reduce the manufacturing cost of the worm gear.
The invention relates to a method for processing a small-modulus fan-shaped worm gear, which comprises the following steps of:
1) making an alloy steel consumption quota according to requirements, and preparing materials;
2) quenching and tempering: quenching and tempering alloy steel to ensure that the alloy steel used by the worm gear meets the mechanical performance requirement; the quenching and tempering heat treatment is that the parts are heated to 850 +/-20 ℃, the temperature is kept for 150 +/-20 min, then the parts are immersed into oil with the temperature below 100 ℃ for rapid cooling, then the parts are put into a tempering furnace with the temperature of 530 +/-25 ℃ for heat preservation tempering, the heat preservation time is kept for 150 +/-20 min, and finally the parts are cooled;
3) refining the gear blank: performing finish machining on the blank subjected to heat treatment to obtain a fan-shaped tooth blank required by design, and ensuring the reference precision required by tooth profile machining;
4) aging treatment: carrying out aging treatment on the gear blank to eliminate machining stress;
5) tooth manufacturing: processing a tooth part of a gear blank formed by the worm gear, ensuring the precision of the tooth part, and removing burrs generated by the processing of the tooth part;
6) carrying out soft nitriding treatment: carrying out surface soft nitriding treatment on the processed worm wheel, namely: cleaning the surface of a worm gear, cleaning grease on the surface processed in the previous process, putting the worm gear into a nitriding furnace, heating to 550 +/-10 ℃, keeping the temperature for 140 +/-20 min, and introducing ammonia gas and decomposing in the heat preservation process; after the heat preservation is finished, stopping heating, cooling along with the furnace to 400-380 ℃, and opening the furnace to carry out oil cooling to room temperature;
7) and detecting and warehousing according to requirements.
In the method, the alloy steel is 40CrNiMoA or 18Cr2Ni4WA
In the method, the surface hardness of the blank after quenching and tempering heat treatment is controlled to be 28-35 HRC, so that the alloy steel meets the mechanical property required by a worm gear.
In the method, the surface hardness of the tooth part of the worm gear after the soft nitriding treatment is greater than 450HV, and the penetration depth is 0.05-0.2 mm.
Due to the adoption of the technical scheme, the invention has the advantages that: the invention adopts alloy steel to replace copper material used by the conventional worm gear, and simultaneously improves the wear resistance of the worm gear by a surface heat treatment method, thereby achieving the purposes of reducing the cost, lightening the weight of the worm gear and improving the wear resistance of the worm gear.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following examples.
Examples
In this embodiment, the material of the sector worm wheel is 18Cr2Ni4WA, and the parameters of the worm wheel tooth part are as follows: the modulus Mn is 0.6, the tooth number Z is 40 (sector full tooth number 15), the pressure angle is 20 °, and the helix angle is 4 ° (right-hand).
The specific processing method comprises the following steps:
1) setting a material consumption quota according to requirements, and preparing materials;
2) thermal refining: quenching and tempering the material to ensure that the material used by the worm gear meets the mechanical performance requirement, wherein the quenching and tempering heat treatment is to heat the part to 850 +/-20 ℃, preserve heat for 150 +/-20 min, then immerse the part in oil at the temperature of below 100 ℃ for rapid cooling, then put the part in a tempering furnace at the temperature of 530 +/-25 ℃ for heat preservation and tempering, preserve heat for 150 +/-20 min, and finally cool the part, wherein the surface hardness of the blank is controlled at 28-35 HRC to ensure that the material meets the mechanical performance required by the worm gear;
3) refining the gear blank: carrying out finish machining on the blank subjected to heat treatment, processing the blank into a fan-shaped tooth blank required by design through methods such as numerical control turning, milling and the like, and ensuring the reference precision required by tooth profile processing;
4) aging treatment: carrying out aging treatment on the gear blank to eliminate machining stress;
5) tooth manufacturing: processing a tooth part of a gear blank formed by the worm gear, ensuring the precision of the tooth part, and removing burrs generated by the processing of the tooth part;
6) carrying out soft nitriding treatment: and performing surface soft nitriding treatment on the processed worm gear, namely cleaning the surface of the worm gear, cleaning grease on the surface processed in the previous process, putting the worm gear into a nitriding furnace, heating to 550 +/-10 ℃, keeping the temperature for 140 +/-20 min, and introducing ammonia gas and decomposing in the heat preservation process. After the heat preservation is finished, stopping heating, cooling along with the furnace to 400-380 ℃, opening the furnace, and carrying out oil cooling to room temperature until the surface hardness of the tooth part is more than 450HV and the depth of a penetrated layer is 0.05-0.2 mm;
7) and detecting and warehousing according to requirements.
In conclusion, the alloy steel is adopted to replace the copper material used by the conventional worm gear, and the wear resistance of the worm gear is improved by a surface heat treatment method, so that the aims of reducing the cost, lightening the weight of the worm gear and improving the wear resistance of the worm gear are fulfilled.
Claims (4)
1. A method for processing a small-modulus fan-shaped worm gear is characterized by comprising the following steps:
1) making an alloy steel consumption quota according to requirements, and preparing materials;
2) quenching and tempering: quenching and tempering alloy steel to ensure that the alloy steel used by the worm gear meets the mechanical performance requirement; the quenching and tempering heat treatment is that the parts are heated to 850 +/-20 ℃, the temperature is kept for 150 +/-20 min, then the parts are immersed into oil with the temperature below 100 ℃ for rapid cooling, then the parts are put into a tempering furnace with the temperature of 530 +/-25 ℃ for heat preservation tempering, the heat preservation time is kept for 150 +/-20 min, and finally the parts are cooled;
3) refining the gear blank: performing finish machining on the blank subjected to heat treatment to obtain a fan-shaped tooth blank required by design, and ensuring the reference precision required by tooth profile machining;
4) aging treatment: carrying out aging treatment on the gear blank to eliminate machining stress;
5) tooth manufacturing: processing a tooth part of a gear blank formed by the worm gear, ensuring the precision of the tooth part, and removing burrs generated by the processing of the tooth part;
6) carrying out soft nitriding treatment: carrying out surface soft nitriding treatment on the processed worm wheel, namely: cleaning the surface of a worm gear, cleaning grease on the surface processed in the previous process, putting the worm gear into a nitriding furnace, heating to 550 +/-10 ℃, keeping the temperature for 140 +/-20 min, and introducing ammonia gas and decomposing in the heat preservation process; after the heat preservation is finished, stopping heating, cooling along with the furnace to 400-380 ℃, and opening the furnace to carry out oil cooling to room temperature;
7) and detecting and warehousing according to requirements.
2. The method as claimed in claim 1, wherein the method comprises the following steps: the alloy steel is 40CrNiMoA or 18Cr2Ni4 WA.
3. The method as claimed in claim 1, wherein the method comprises the following steps: the surface hardness of the blank after quenching and tempering heat treatment is controlled to be 28-35 HRC, so that the alloy steel meets the mechanical property required by the worm gear.
4. The method as claimed in claim 1, wherein the method comprises the following steps: the surface hardness of the tooth part of the worm wheel after the soft nitriding treatment is larger than 450HV, and the penetration depth is 0.05-0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011121531.8A CN112276500A (en) | 2020-10-20 | 2020-10-20 | Method for processing small-modulus sector worm gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011121531.8A CN112276500A (en) | 2020-10-20 | 2020-10-20 | Method for processing small-modulus sector worm gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112276500A true CN112276500A (en) | 2021-01-29 |
Family
ID=74497846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011121531.8A Pending CN112276500A (en) | 2020-10-20 | 2020-10-20 | Method for processing small-modulus sector worm gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112276500A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101333663A (en) * | 2007-06-26 | 2008-12-31 | 贵州群建齿轮有限公司 | Technological process for reducing deformation of gear in process of nitridation heat treatment |
| US20090314389A1 (en) * | 2005-08-05 | 2009-12-24 | Honda Motor Co., Ltd. | Ion Nitriding Method |
| CN101844306A (en) * | 2010-06-17 | 2010-09-29 | 株洲齿轮有限责任公司 | Processing method of annular gear of thin-wall member |
| CN102950433A (en) * | 2012-10-27 | 2013-03-06 | 富莱茵汽车部件有限公司 | Gear processing technology for gear pump |
| CN105171364A (en) * | 2015-09-16 | 2015-12-23 | 贵州群建精密机械有限公司 | Machining method of timing gear of heavy truck automobile engine |
| CN105624691A (en) * | 2014-11-26 | 2016-06-01 | 重庆市巴南区永兴机械厂 | Carburizing and quenching process for 20Cr2Ni4A steel gear |
| CN105714240A (en) * | 2014-12-04 | 2016-06-29 | 重庆旭新悦数控机械有限公司 | Nitridation process for worm gear |
| CN106756769A (en) * | 2016-12-09 | 2017-05-31 | 贵州群建精密机械有限公司 | A kind of antifatigue nitriding method of engine of heavy-duty car timing gears |
| CN109023224A (en) * | 2018-09-11 | 2018-12-18 | 贵州群建精密机械有限公司 | A kind of flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear |
-
2020
- 2020-10-20 CN CN202011121531.8A patent/CN112276500A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090314389A1 (en) * | 2005-08-05 | 2009-12-24 | Honda Motor Co., Ltd. | Ion Nitriding Method |
| CN101333663A (en) * | 2007-06-26 | 2008-12-31 | 贵州群建齿轮有限公司 | Technological process for reducing deformation of gear in process of nitridation heat treatment |
| CN101844306A (en) * | 2010-06-17 | 2010-09-29 | 株洲齿轮有限责任公司 | Processing method of annular gear of thin-wall member |
| CN102950433A (en) * | 2012-10-27 | 2013-03-06 | 富莱茵汽车部件有限公司 | Gear processing technology for gear pump |
| CN105624691A (en) * | 2014-11-26 | 2016-06-01 | 重庆市巴南区永兴机械厂 | Carburizing and quenching process for 20Cr2Ni4A steel gear |
| CN105714240A (en) * | 2014-12-04 | 2016-06-29 | 重庆旭新悦数控机械有限公司 | Nitridation process for worm gear |
| CN105171364A (en) * | 2015-09-16 | 2015-12-23 | 贵州群建精密机械有限公司 | Machining method of timing gear of heavy truck automobile engine |
| CN106756769A (en) * | 2016-12-09 | 2017-05-31 | 贵州群建精密机械有限公司 | A kind of antifatigue nitriding method of engine of heavy-duty car timing gears |
| CN109023224A (en) * | 2018-09-11 | 2018-12-18 | 贵州群建精密机械有限公司 | A kind of flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210129 |
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| RJ01 | Rejection of invention patent application after publication |