CN105171364A - Machining method of timing gear of heavy truck automobile engine - Google Patents
Machining method of timing gear of heavy truck automobile engine Download PDFInfo
- Publication number
- CN105171364A CN105171364A CN201510588020.XA CN201510588020A CN105171364A CN 105171364 A CN105171364 A CN 105171364A CN 201510588020 A CN201510588020 A CN 201510588020A CN 105171364 A CN105171364 A CN 105171364A
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- Prior art keywords
- gear
- automobile engine
- nitrogen treatment
- temperature
- ofr
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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
-
- 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
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a machining method of a timing gear of a heavy truck automobile engine. The machining method includes the following steps of fine die forging of gear blanks, quenching and tempering, lathing, hobbing, gear shaving, nitrogen treatment and storage. The machining process is simple, the tooth part and tooth surface contact fatigue strength and the tooth root endurance bending strength can be increased through the nitrogen treatment conducted after quenching and tempering are conducted, and therefore the service life of the gear is prolonged. In addition, the gear is preferentially made of high-quality alloy steel structural steel 42CrMo, quenching and tempering are conducted after die forging, the hardness reaches 229-285 HB, tooth surface nitrogen treatment is conducted after tooth profile machining is completed, the glow ionic nitriding manner is adopted, and the tooth surface hardness requirement reaches that HV0.5 is larger than 600, the depth of a whole tooth profile (comprising tooth root fillets) diffusion layer is larger than 0.3 mm, the compound layer is larger than 0.007 mm, the fragility is at the 1-2 grade and looseness is at the 1-2 grade.
Description
Technical field
The present invention relates to a kind of processing method of heavy card timing gear ofr automobile engine, belong to Machining Technology field.
Background technology
Generally, heavily card timing gear ofr automobile engine often adopts the low-carbon steel materials such as 20CrMo or 20CrMnTi, and after carburizing and quenching, grinding fine finishining ensures precision, and grinding efficiency is lower, causes its processing technology complexity, and cost is higher.In addition, gear, in real work, requires high to temperature environment, works for a long time, easily produce annealing under the environment more than 200 DEG C, and case hardness declines, and the flank of tooth can produce spot corrosion, has influence on the service life of product.
Summary of the invention
The object of the invention is: provide that a kind of technique is simple, cost is low, the processing method of the heavily card timing gear ofr automobile engine of long service life, the method can increase teeth portion tooth face contact fatigue strength and tooth root bending-fatigue strength, thus improve the life-span of gear, meet the instructions for use of heavily card timing gear ofr automobile engine.
Technical scheme of the present invention: a kind of processing method of heavy card timing gear ofr automobile engine, comprises the following steps:
(1) smart forging dies: adopt smart forging dies gear blank;
(2) modifier treatment: gear is put into stove and be warming up to 850 ~ 880 DEG C with stove, temperature retention time 110 ~ 140min, adopts the direct quenching of oil quenching mode, be chilled to 120 ~ 200 DEG C, reheat 610 ~ 650 DEG C again, be incubated 130 ~ 150min at this temperature, put into water and be cooled to room temperature;
(3) turning: by all dimensioned of gear except the gear teeth to figure paper size;
(4) gear hobbing: adopt hobbing processes by the gear teeth machine-shaping of gear, and be the follow-up reserved 0.5 ~ 0.1mm grinding allowance of Shaving Process;
(5) shaving: adopt shaving technique that the gear teeth of gear are machined to figure paper size;
(6) nitrogen treatment: be placed on ionic nitriding equipment by gear, utilizes the mode of Heated by Glow Discharge that gear is heated to 520 ~ 540 DEG C, and at this temperature, air pressure keeps 260 ~ 300Pa, and according to depth of penetration determination temperature retention time;
(7) inspection and warehouse-in: the gear be up to the standards is carried out warehouse-in process.
In preceding method, 120# aviation gasoline before nitrogen treatment, is adopted to be cleaned up by gear surface.
In preceding method, the air pressure control procedure of nitrogen treatment adopts air gauge to measure, air pressure departure ± 5Pa.
In preceding method, during nitrogen treatment, adopt the non-nitriding position of fixture or frock protection gear.
In preceding method, the temperature control process of nitrogen treatment or modifier treatment adopts thermocouple measuring temperature, and adopt automatic recording instrument writing time, temperature uniformity requires as ± 10 DEG C.
In preceding method, gear material is 42CrMo, and after this material carries out modifier treatment, hardness reaches 29 ~ 285HB, and heterogeneous microstructure is tempered sorbite tissue, and this kind of tissue is according to there being good mechanical performance.Gear after modifier treatment carries out nitrogen treatment, and its surface forms nitride, has higher hardness, high-wearing feature, also has certain corrosion resistance simultaneously.Through the gear of ion Plasma Nitriding Treatment, not only contact fatigue improves, and when profile is even, reduce gear, in engagement process, initial failure occurs, flexural fatigue also improves a lot simultaneously.
Owing to have employed technique scheme, the invention has the advantages that: gear material of the present invention selects superior alloy steel structural steel 42CrMo, modifier treatment after forging part, hardness reaches 229 ~ 285HB, after tooth Profile Machining completes, carry out flank of tooth nitrogen treatment, adopt the mode of glow discharge nitriding, tooth face hardness requires to reach HV0.5 > 600, full-depth tooth exterior feature (comprising root fillet) diffusion layer depth > 0.3mm, compound layer > 0.007mm, fragility 1 ~ 2 grade, loose 1 ~ 2 grade.Therefore, the present invention not only processing technology is simple, quick, and production cost is low, and shaping service life of gear is long, can meet different working conditions, applied range.
Detailed description of the invention
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with embodiment, the present invention is described in further detail.
Embodiments of the invention: the present invention selects 42CrMo as gear material, and adopt following steps to process:
(1) smart forging dies: adopt smart forging dies gear blank;
(2) modifier treatment: gear is put into stove and be warming up to 850 ~ 880 DEG C with stove, temperature retention time 110 ~ 140min, adopts the direct quenching of oil quenching mode, be chilled to 120 ~ 200 DEG C, reheat 610 ~ 650 DEG C again, be incubated 130 ~ 150min at this temperature, put into water and be cooled to room temperature; In addition, the temperature control process of modifier treatment adopts thermocouple measuring temperature, and adopt automatic recording instrument writing time, temperature uniformity requires as ± 10 DEG C;
(3) turning: by all dimensioned of gear except the gear teeth to figure paper size;
(4) gear hobbing: adopt hobbing processes by the gear teeth machine-shaping of gear, and be the follow-up reserved 0.5 ~ 0.1mm grinding allowance of Shaving Process;
(5) shaving: adopt shaving technique that the gear teeth of gear are machined to figure paper size;
(6) nitrogen treatment: adopt 120# aviation gasoline to be cleaned up by gear surface before nitrogen treatment, adopt the non-nitriding position of fixture or frock protection gear, then gear is being placed on ionic nitriding equipment, utilize the mode of Heated by Glow Discharge that gear is heated to 520 ~ 540 DEG C, at this temperature, air pressure keeps 260 ~ 300Pa, and according to depth of penetration determination temperature retention time, air pressure control procedure adopts air gauge to measure, air pressure departure ± 5Pa; In addition, the temperature control process of nitrogen treatment adopts thermocouple measuring temperature, and adopt automatic recording instrument writing time, temperature uniformity requires as ± 10 DEG C.
(7) inspection and warehouse-in: the gear be up to the standards is carried out warehouse-in process.
Claims (6)
1. a processing method for heavy card timing gear ofr automobile engine, is characterized in that comprising the following steps:
(1) smart forging dies: adopt smart forging dies gear blank;
(2) modifier treatment: gear is put into stove and be warming up to 850 ~ 880 DEG C with stove, temperature retention time 110 ~ 140min, adopts the direct quenching of oil quenching mode, be chilled to 120 ~ 200 DEG C, reheat 610 ~ 650 DEG C again, be incubated 130 ~ 150min at this temperature, put into water and be cooled to room temperature;
(3) turning: by all dimensioned of gear except the gear teeth to figure paper size;
(4) gear hobbing: adopt hobbing processes by the gear teeth machine-shaping of gear, and be the follow-up reserved 0.5 ~ 0.1mm grinding allowance of Shaving Process;
(5) shaving: adopt shaving technique that the gear teeth of gear are machined to figure paper size;
(6) nitrogen treatment: be placed on ionic nitriding equipment by gear, utilizes the mode of Heated by Glow Discharge that gear is heated to 520 ~ 540 DEG C, and at this temperature, air pressure keeps 260 ~ 300Pa, and according to depth of penetration determination temperature retention time;
(7) inspection and warehouse-in: the gear be up to the standards is carried out warehouse-in process.
2. the processing method of heavy card timing gear ofr automobile engine according to claim 1, is characterized in that: adopt 120# aviation gasoline to be cleaned up by gear surface before described nitrogen treatment.
3. the processing method of heavy card timing gear ofr automobile engine according to claim 2, is characterized in that: the air pressure control procedure of described nitrogen treatment adopts air gauge to measure, air pressure departure ± 5Pa.
4. the processing method of heavy card timing gear ofr automobile engine according to claim 3, is characterized in that: the non-nitriding position adopting fixture or frock protection gear during described nitrogen treatment.
5. the processing method of heavy card timing gear ofr automobile engine according to claim 1, it is characterized in that: the temperature control process of described nitrogen treatment or modifier treatment adopts thermocouple measuring temperature, adopt automatic recording instrument writing time, temperature uniformity requires as ± 10 DEG C.
6. the processing method of heavy card timing gear ofr automobile engine according to claim 1, is characterized in that: described gear material is 42CrMo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510588020.XA CN105171364A (en) | 2015-09-16 | 2015-09-16 | Machining method of timing gear of heavy truck automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510588020.XA CN105171364A (en) | 2015-09-16 | 2015-09-16 | Machining method of timing gear of heavy truck automobile engine |
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| CN105171364A true CN105171364A (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510588020.XA Pending CN105171364A (en) | 2015-09-16 | 2015-09-16 | Machining method of timing gear of heavy truck automobile engine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105624371A (en) * | 2015-12-30 | 2016-06-01 | 平高集团有限公司 | Manufacturing method for switching-closing half shaft of high-voltage vacuum circuit breaker and switching-closing half shaft of high-voltage vacuum circuit breaker |
| CN106514165A (en) * | 2016-12-15 | 2017-03-22 | 贵州群建精密机械有限公司 | Glow-ion nitriding treatment method for gear made of 05Cr17Ni4Cu4Nb material |
| 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 |
| CN111037243A (en) * | 2018-10-11 | 2020-04-21 | 上海汽车变速器有限公司 | Manufacturing method of parking gear of gearbox |
| CN112276500A (en) * | 2020-10-20 | 2021-01-29 | 贵州群建精密机械有限公司 | Method for processing small-modulus sector worm gear |
| CN113930716A (en) * | 2021-08-31 | 2022-01-14 | 北京卫星制造厂有限公司 | Ion nitriding method for ultrahigh-strength stainless steel gear |
| CN114248071A (en) * | 2021-12-20 | 2022-03-29 | 上海炽星新材料科技有限公司 | Method for manufacturing automobile clutch disc hub |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0691441A (en) * | 1992-09-17 | 1994-04-05 | Nippon Steel Corp | Manufacture of high contact fatigue strength gear |
| US20030070297A1 (en) * | 2001-09-13 | 2003-04-17 | Masataka Nakaoka | Method for fabricating external-tooth gears |
| CN104439994A (en) * | 2014-12-03 | 2015-03-25 | 江西科技学院 | Manufacturing method for automobile transmission gear |
| CN104439988A (en) * | 2013-09-17 | 2015-03-25 | 贵州群建精密机械有限公司 | Machining technology for gear made of 9Cr18 material |
| CN103223577B (en) * | 2013-05-03 | 2015-05-20 | 天津市天瑞硬化工程有限公司 | Anti-fatigue manufacturing method of spiral bevel gear |
| CN104723046A (en) * | 2015-03-26 | 2015-06-24 | 西安北方光电科技防务有限公司 | Method for improving nitriding bevel gear wheel part machining precision |
-
2015
- 2015-09-16 CN CN201510588020.XA patent/CN105171364A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0691441A (en) * | 1992-09-17 | 1994-04-05 | Nippon Steel Corp | Manufacture of high contact fatigue strength gear |
| US20030070297A1 (en) * | 2001-09-13 | 2003-04-17 | Masataka Nakaoka | Method for fabricating external-tooth gears |
| CN103223577B (en) * | 2013-05-03 | 2015-05-20 | 天津市天瑞硬化工程有限公司 | Anti-fatigue manufacturing method of spiral bevel gear |
| CN104439988A (en) * | 2013-09-17 | 2015-03-25 | 贵州群建精密机械有限公司 | Machining technology for gear made of 9Cr18 material |
| CN104439994A (en) * | 2014-12-03 | 2015-03-25 | 江西科技学院 | Manufacturing method for automobile transmission gear |
| CN104723046A (en) * | 2015-03-26 | 2015-06-24 | 西安北方光电科技防务有限公司 | Method for improving nitriding bevel gear wheel part machining precision |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105624371A (en) * | 2015-12-30 | 2016-06-01 | 平高集团有限公司 | Manufacturing method for switching-closing half shaft of high-voltage vacuum circuit breaker and switching-closing half shaft of high-voltage vacuum circuit breaker |
| 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 |
| CN106514165A (en) * | 2016-12-15 | 2017-03-22 | 贵州群建精密机械有限公司 | Glow-ion nitriding treatment method for gear made of 05Cr17Ni4Cu4Nb material |
| CN111037243A (en) * | 2018-10-11 | 2020-04-21 | 上海汽车变速器有限公司 | Manufacturing method of parking gear of gearbox |
| CN111037243B (en) * | 2018-10-11 | 2021-06-11 | 上海汽车变速器有限公司 | Manufacturing method of parking gear of gearbox |
| CN112276500A (en) * | 2020-10-20 | 2021-01-29 | 贵州群建精密机械有限公司 | Method for processing small-modulus sector worm gear |
| CN113930716A (en) * | 2021-08-31 | 2022-01-14 | 北京卫星制造厂有限公司 | Ion nitriding method for ultrahigh-strength stainless steel gear |
| CN114248071A (en) * | 2021-12-20 | 2022-03-29 | 上海炽星新材料科技有限公司 | Method for manufacturing automobile clutch disc hub |
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Application publication date: 20151223 |