CN104070334B - A kind of manufacturing process of bevel gear - Google Patents
A kind of manufacturing process of bevel gear Download PDFInfo
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- CN104070334B CN104070334B CN201410300148.7A CN201410300148A CN104070334B CN 104070334 B CN104070334 B CN 104070334B CN 201410300148 A CN201410300148 A CN 201410300148A CN 104070334 B CN104070334 B CN 104070334B
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- well formula
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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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- Mechanical Engineering (AREA)
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- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The present invention relates to the manufacturing process of a kind of bevel gear, including following step: step one, forging and stamping blank；Step 2, conditioning treatment；Step 3, cutting；Step 4, heat treatment；Step 5, the polish of installation connecting portion；Step 6, gear lapping；Step 7, phosphatization；Step 8, pairing.The gear that the manufacturing process of bevel gear of the present invention obtains, at end surface measurement, is originally 450 ~ 480HV；Tissue committee martensite containing nitrogen；Case depth is 0.2 ~ 0.5mm, meets design requirement comprehensively.
Description
Technical field
The present invention relates to the manufacturing process of bevel gear.
Background technology
The processing of bevel gear is more complicated in Gear Processing, is mainly manifested in cutting operation.
Traditional bevel gear processing technique is such that the polish gear lapping pairing of the coarse-fine processing cutting Q-tempering installation connecting portion of the selection forging and stamping rough turn wheel blank of blank normalizing and installation connecting portion；Above processing technique can obtain the product of good quality to a certain extent, but, it is the thickest to there is interiors of products crystal grain in existing processing technique, deforms relatively big after heat treatment, the most high deficiency of precision, thus greatly have impact on the service life of bevel gear.
Summary of the invention
The technical problem to be solved is to provide the manufacturing process of a kind of bevel gear, and technique is simple, and case hardness is 450 ~ 480HV；Martensite containing nitrogen in tissue；Case depth is 0.2 ~ 0.5mm, meets design requirement comprehensively.
The present invention uses following scheme: the manufacturing process of bevel gear, including following step:
Step one, forging and stamping blank；
Step 2, conditioning treatment；
Step 3, cutting；
Step 4, heat treatment；
Step 5, the polish of installation connecting portion；
Step 6, gear lapping；
Step 7, phosphatization；
Step 8, pairing.
Described conditioning treatment is modulation treatment: specifically 830 ~ 850 DEG C of heating in common moderate box-type furnace, oil quenchinng after thoroughly burning；610 ~ 630 DEG C of heating in low hot-well formula resistance furnace, water-cooled after thoroughly burning；
Described heat treatment: in 560 ~ 580 DEG C in well formula nitriding furnace, logical ammonia and instillation methanol carry out nitrocarburizing, directly oil quenchinng after insulation 4h；Then it is tempered in low hot-well formula resistance furnace: 180 ~ 200 DEG C of heating, air cooling after insulation 1h.
Also including the austenite carbo-nitriding of gear: in 770 ~ 790 DEG C in well formula nitriding furnace, logical ammonia and instillation methanol carry out nitrocarburizing, directly oil quenchinng after insulation 4h；Then it is tempered in low hot-well formula resistance furnace: 380 ~ 450 DEG C of heating, air cooling after insulation 2h.
Beneficial effects of the present invention:
At end surface measurement, case hardness is 450 ~ 480HV；Martensite containing nitrogen in tissue；Case depth is 0.2 ~ 0.5mm, meets design requirement comprehensively.
Detailed description of the invention
The present invention will be described in further detail below.
Embodiment one,
The manufacturing process route of 20CrMo and 20Cr steel gear: comprise the following steps:
Step one, blanking；
Step 2, rough turn；
Step 3, normalizing；
Step 4, carbo-nitriding；
Step 5, quenching；
Step 6, tempering；
Step 7, it is ground to finished product.
Described conditioning treatment: utilize residual forging heat to carry out normalized treatment.Hardness is 156 ~ 214HBW, and to improve mechanical processing technique, its gross decarburization layer must not exceed the 1/3 of reserved processing capacity.
Described heat treatment: 820 ~ 860 DEG C of heating in pit carburizing furnace, instills methanol and acetone carries out carbo-nitriding, and direct quenching cooling in the deep fat of 80 DEG C；Then it is tempered in low hot-well formula resistance furnace, 350 ~ 420 DEG C of heating, air cooling after thoroughly burning.
Also including the austenite carbo-nitriding of gear: in 770 ~ 790 DEG C in well formula nitriding furnace, logical ammonia and instillation methanol carry out nitrocarburizing, directly oil quenchinng after insulation 4h；Then it is tempered in low hot-well formula resistance furnace: 380 ~ 450 DEG C of heating, air cooling after insulation 2h.
Result: at end surface measurement, case hardness is 450 ~ 480HV；Martensite containing nitrogen in tissue；Case depth is 0.2 ~ 0.5mm, meets design requirement comprehensively.
Embodiment two,
The manufacturing process of 40Cr steel gear, including following step:
Step one, blanking；
Step 2, rough turn；
Step 3, modulation treatment；
Step 4, polish；
Step 5, mill teeth；
Step 6, nitrocarburizing；
Step 7, it is ground to finished product.
Described conditioning treatment is modulation treatment: specifically 830 ~ 850 DEG C of heating in common moderate box-type furnace, oil quenchinng after thoroughly burning；610 ~ 630 DEG C of heating in low hot-well formula resistance furnace, water-cooled after thoroughly burning.
Described heat treatment: in 560 ~ 580 DEG C in well formula nitriding furnace, logical ammonia and instillation methanol carry out nitrocarburizing, directly oil quenchinng after insulation 4h；Then it is tempered in low hot-well formula resistance furnace: 180 ~ 200 DEG C of heating, air cooling after insulation 1h.
Also including the austenite carbo-nitriding of gear: in 770 ~ 790 DEG C in well formula nitriding furnace, logical ammonia and instillation methanol carry out nitrocarburizing, directly oil quenchinng after insulation 4h；Then it is tempered in low hot-well formula resistance furnace: 380 ~ 450 DEG C of heating, air cooling after insulation 2h.
Result: at end surface measurement, case hardness is 450 ~ 480HV；Martensite containing nitrogen in tissue；Case depth is 0.2 ~ 0.5mm, meets design requirement comprehensively.
Claims (1)
1. the manufacturing process of a bevel gear, it is characterised in that include following step:
Step one, forging and stamping blank；Step 2, conditioning treatment；Step 3, cutting；Step 4, heat treatment；Step 5, the polish of installation connecting portion；Step 6, gear lapping；Step 7, phosphatization；Step 8, pairing；
Described conditioning treatment is modulation treatment: specifically 830 ~ 850 DEG C of heating in common moderate box-type furnace, oil quenchinng after thoroughly burning；610 ~ 630 DEG C of heating in low hot-well formula resistance furnace, water-cooled after thoroughly burning；
Described heat treatment: in 560 ~ 580 DEG C in well formula nitriding furnace, logical ammonia and instillation methanol carry out nitrocarburizing, directly oil quenchinng after insulation 4h；Then it is tempered in low hot-well formula resistance furnace: 180 ~ 200 DEG C of heating, air cooling after insulation 1h；
Also including the austenite carbo-nitriding of gear: in 770 ~ 790 DEG C in well formula nitriding furnace, logical ammonia and instillation methanol carry out nitrocarburizing, directly oil quenchinng after insulation 4h；Then it is tempered in low hot-well formula resistance furnace: 380 ~ 450 DEG C of heating, air cooling after insulation 2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410300148.7A CN104070334B (en) | 2014-06-30 | 2014-06-30 | A kind of manufacturing process of bevel gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410300148.7A CN104070334B (en) | 2014-06-30 | 2014-06-30 | A kind of manufacturing process of bevel gear |
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| Publication Number | Publication Date |
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| CN104070334A CN104070334A (en) | 2014-10-01 |
| CN104070334B true CN104070334B (en) | 2016-08-24 |
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| CN201410300148.7A Active CN104070334B (en) | 2014-06-30 | 2014-06-30 | A kind of manufacturing process of bevel gear |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439992A (en) * | 2014-11-19 | 2015-03-25 | 柳州科尔特锻造机械有限公司 | Drive bevel gear machining method |
| CN104723046B (en) * | 2015-03-26 | 2017-04-12 | 西安北方光电科技防务有限公司 | Method for improving nitriding bevel gear wheel part machining precision |
| CN109483184A (en) * | 2017-09-13 | 2019-03-19 | 南京美克斯精密机械有限公司 | A kind of bevel gear machining method |
| CN108942125A (en) * | 2018-08-06 | 2018-12-07 | 合肥银泉铸造有限责任公司 | A kind of diclinic Gearmaking Technology |
| CN108747238A (en) * | 2018-08-06 | 2018-11-06 | 合肥银泉铸造有限责任公司 | A kind of Machining Spiral Bevel Gear technique |
| CN110030362A (en) * | 2018-12-24 | 2019-07-19 | 南京儒一航空机械装备有限公司 | A kind of straight bevel gear and manufacturing process |
| CN112935737A (en) * | 2021-03-25 | 2021-06-11 | 上齿集团有限公司 | Novel spiral bevel gear dry cutting method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05320746A (en) * | 1992-05-25 | 1993-12-03 | Mitsubishi Motors Corp | Manufacture of gear made of austemper ductile cast iron |
| CN1094409C (en) * | 1998-03-13 | 2002-11-20 | 张元增 | Method for making speed changer gear |
| CN1234903C (en) * | 2003-10-28 | 2006-01-04 | 昆明理工大学 | Method for eliminating structure of internal oxidation in gas carbonitriding heat treatment for gear wheels |
| US7188420B2 (en) * | 2004-03-15 | 2007-03-13 | Torque—Traction Technologies, Inc. | Method for manufacturing bevel gears |
| JP2011105998A (en) * | 2009-11-19 | 2011-06-02 | Ud Trucks Corp | Treatment method for steel |
| CN103831599A (en) * | 2014-03-20 | 2014-06-04 | 重庆市坤津机械厂 | Machining method for hardened face gear |
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| CN104070334A (en) | 2014-10-01 |
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