CN1584068A - Local softening process for active umbrella gearing of heavy vehicle - Google Patents
Local softening process for active umbrella gearing of heavy vehicle Download PDFInfo
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- CN1584068A CN1584068A CN 200410024132 CN200410024132A CN1584068A CN 1584068 A CN1584068 A CN 1584068A CN 200410024132 CN200410024132 CN 200410024132 CN 200410024132 A CN200410024132 A CN 200410024132A CN 1584068 A CN1584068 A CN 1584068A
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- bevel gear
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Abstract
A local softening process for active bevel gear of heavy vehicle includes: a. inducing heating for screw end transient arc; b. inducing heating for screw part; c. stopping heating, work pieces returning to starting state and finishing a heating circulation; d. N-time pulsing circulating heating for work pieces and stopping; e. cooling work pieces in air. It achieves simple operation, high-efficient and good controllability.
Description
(1) technical field
The present invention relates to the processing method of heavy-duty car back axle driving bevel gear local softening, belong to metallic substance heat treatment technics field.
(2) background technology
Driving bevel gear on the heavy-duty car back axle is the tape spool conical gear, axial region has connecting thread, shaft shoulder place has transition arc, this screw connection point bears bigger reversing and impact fatigue during motor live time, for improving bending resistance, torsional strength and the impelling strength of whole work-piece, brittle rupture when preventing that screw thread and transition arc are in vehicle operating, require this position that rational strength and toughness coupling will be arranged, will double thread and transition arc place local softening after the driving bevel gear complete heat treatment.At present, smear permeability-reducing admixture at the local softening position before the domestic common employing whole workpiece carburizing and quenching, lead bath furnace low-temperature annealing, salt bath furnace low-temperature annealing or high intermediate frequency induction heating and annealing are taked in carburizing and quenching post softening position, or the combination of this several method.These method inefficiencies, poor working environment or surface hardness poisonous, the workpiece heat affected zone are difficult to control, unstable product quality, are prone to the fracture failure phenomenon.
(3) summary of the invention
The present invention is directed to the deficiencies in the prior art, provide that a kind of efficient height, controllability are strong, easy and simple to handle, the heavy-duty car driving bevel gear local softening novel process of stable and reliable product quality.
The solution that the present invention adopts may further comprise the steps:
A, transition arc district, double thread end induction heating;
B, double thread position scanning induction heating;
C, stop the heating, the workpiece dry running is back to the starting position of thread head transition arc district induction heating, finishes a heating cycle;
D, workpiece is carried out stopping after N the pulsation circulation heating according to above-mentioned steps;
E, workpiece is cooled off in air.
N pulsation circulation adds that to pine for N be 19-21.
The present invention quenches at this workpiece carbonization and adopts this method of pulsation circulation induction heating when the back spot anneling is softening to be handled, key is through repeatedly continuous pulsation circulation heating and heat conduction have promoted the softening position of workpiece temperature rapidly, reach and make its diathermanous and uniform purpose of temperature, reduced heat affecting simultaneously to the workpiece heat affected zone, the surface hardness that obtains softening position and workpiece heat affected zone behind the air cooling all meets the product technology requirement, and softening position reaches intensity, flexible optimization cooperates.Efficient height of the present invention, strong, easy and simple to handle, the stable and reliable product quality of controllability.
(4) description of drawings
Fig. 1 is the structural representation of the medium and heavy automobile driving bevel gear of background technology of the present invention.
Fig. 2 is the relative position synoptic diagram of inductor block and workpiece during induction heating among the present invention.
Wherein: 1, edge joint screw thread, 2, transition arc, 3, the transition arc district, 4, the workpiece heat affected zone, 5, the workpiece heat affected zone, 6, driving bevel gear, 7, inductor block
(5) embodiment
Embodiment: Fig. 1 has provided the structural representation of heavy-duty car driving bevel gear.This conical gear 7 is the tape spool conical gear, and axial region has connecting thread 1, and shaft shoulder place has transition arc 2, and its material is 20CrNi3, and the surface hardness behind carburizing and quenching is HRC57-63.Each region surface hardness after softening requires: transition arc district 3 HRC30-45 of place, workpiece heat affected zone 4 HRC38-48 of place, 5 places, workpiece heat affected zone are for being not less than HRC52, and length is respectively beyond 48mm, 18mm and the 66mm everywhere.Use equipment is that a CYP100/35 ultrasonic frequency power supply is joined a vertical quenching machine of GCT10120A with PLC control kinetic energy.This quenching machine possesses the function of induction heating parameter setting and control.What frock adopted is a kind of loop inductor.The relative position (at transition arc 2 places) of inductor block 7 and driving bevel gear 6 is adjusted quenching machine during according to induction heating shown in Figure 2, with driving bevel gear 7 clampings on quenching machine.On quenching machine PLC, configure cycle index N (for 19-21 time), transition arc 2 places once (fixed position) t heat-up time (for 5.5-6s), workpiece scanning rate of heating V1 (for 3-4mm/s) and retum speed V2 (for 2-3mm/s).When pressing the program loop button, processing begins, and equipment can carry out automatically according to the following steps according to setting program: a, transition arc district, double thread end 3 induction heating (workpiece heat affected zone 4 and 5 relies on the thermal conduction heating simultaneously); B, double thread position scanning induction heating; C, stop the heating, the workpiece dry running is back to the starting position of thread head transition arc district induction heating, finishes a heating cycle; D, workpiece is carried out stopping after 19-21 the pulsation circulation heating according to above-mentioned steps; E takes off the workpiece air cooling, gets final product.
Claims (2)
1. heavy-duty car driving bevel gear local softening novel process is characterized in that: may further comprise the steps:
A, transition arc district, double thread end induction heating;
B, double thread position scanning induction heating;
C, stop the heating, the workpiece dry running is back to the starting position of thread head transition arc district induction heating, finishes a heating cycle;
D, workpiece is carried out stopping after N the pulsation circulation heating according to above-mentioned steps;
E, workpiece is cooled off in air.
2. heavy-duty car driving bevel gear local softening novel process according to claim 1 is characterized in that: described N pulsation circulation adds that to pine for N be 19-21.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024132 CN1257989C (en) | 2004-05-21 | 2004-05-21 | Local softening process for active umbrella gearing of heavy vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024132 CN1257989C (en) | 2004-05-21 | 2004-05-21 | Local softening process for active umbrella gearing of heavy vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1584068A true CN1584068A (en) | 2005-02-23 |
| CN1257989C CN1257989C (en) | 2006-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410024132 Expired - Fee Related CN1257989C (en) | 2004-05-21 | 2004-05-21 | Local softening process for active umbrella gearing of heavy vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1257989C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168164A (en) * | 2011-05-30 | 2011-08-31 | 常熟市异型钢管有限公司 | Quenching method and quenching device for abnormal drill stem with outer arc |
| CN102808076A (en) * | 2012-08-21 | 2012-12-05 | 青岛德盛机械制造有限公司 | Annealing device |
| CN104357622A (en) * | 2014-11-10 | 2015-02-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Local softening method of high-strength alloy steel carburized parts |
| CN105420480A (en) * | 2015-11-28 | 2016-03-23 | 重庆市首业机械制造有限公司 | Basin angle gear annealing process |
| CN106702104A (en) * | 2015-11-18 | 2017-05-24 | 江苏明进汽车模具有限公司 | Softening treatment method for part of hot-punching high-strength panel |
| CN106755911A (en) * | 2016-12-23 | 2017-05-31 | 郑州华威齿轮有限公司 | A kind of driving gear axle thread and R angles Technology for Heating Processing and equipment |
| CN106755887A (en) * | 2016-11-23 | 2017-05-31 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of method for preventing flange crackle after locking pin carburizing |
| CN106868282A (en) * | 2015-12-11 | 2017-06-20 | 中国航空工业集团公司北京航空制造工程研究所 | A kind of local softening method of titanium alloy self-plugging rivet |
| CN107177726A (en) * | 2017-04-12 | 2017-09-19 | 万向钱潮传动轴有限公司 | A kind of carburizing means of defence |
| CN111719109A (en) * | 2020-06-30 | 2020-09-29 | 东科克诺尔商用车制动技术有限公司 | Method for solving breakage of optical axis and threads of rocker shaft of steering gear |
-
2004
- 2004-05-21 CN CN 200410024132 patent/CN1257989C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168164A (en) * | 2011-05-30 | 2011-08-31 | 常熟市异型钢管有限公司 | Quenching method and quenching device for abnormal drill stem with outer arc |
| CN102168164B (en) * | 2011-05-30 | 2012-09-19 | 常熟市异型钢管有限公司 | Quenching method and quenching device for abnormal drill stem with outer arc |
| CN102808076A (en) * | 2012-08-21 | 2012-12-05 | 青岛德盛机械制造有限公司 | Annealing device |
| CN104357622A (en) * | 2014-11-10 | 2015-02-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Local softening method of high-strength alloy steel carburized parts |
| CN106702104A (en) * | 2015-11-18 | 2017-05-24 | 江苏明进汽车模具有限公司 | Softening treatment method for part of hot-punching high-strength panel |
| CN105420480A (en) * | 2015-11-28 | 2016-03-23 | 重庆市首业机械制造有限公司 | Basin angle gear annealing process |
| CN106868282A (en) * | 2015-12-11 | 2017-06-20 | 中国航空工业集团公司北京航空制造工程研究所 | A kind of local softening method of titanium alloy self-plugging rivet |
| CN106755887A (en) * | 2016-11-23 | 2017-05-31 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of method for preventing flange crackle after locking pin carburizing |
| CN106755911A (en) * | 2016-12-23 | 2017-05-31 | 郑州华威齿轮有限公司 | A kind of driving gear axle thread and R angles Technology for Heating Processing and equipment |
| CN106755911B (en) * | 2016-12-23 | 2018-05-29 | 郑州华威齿轮有限公司 | A kind of driving gear axle thread and R angles heat treatment process and equipment |
| CN107177726A (en) * | 2017-04-12 | 2017-09-19 | 万向钱潮传动轴有限公司 | A kind of carburizing means of defence |
| CN111719109A (en) * | 2020-06-30 | 2020-09-29 | 东科克诺尔商用车制动技术有限公司 | Method for solving breakage of optical axis and threads of rocker shaft of steering gear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1257989C (en) | 2006-05-31 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Owner name: CHINA NATIONAL HEAVY DUTY TRUCK GROUP CORP., LTD. Free format text: FORMER OWNER: CHINA HEAVY AUTOMOBILE GROUP CO., LTD. Effective date: 20061013 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20061013 Address after: 250116, Shandong province Ji'nan City Central Party home town head Patentee after: China heavy duty automobile group Ji'nan bridge box Co., Ltd. Address before: Shadowless Hill Road, Ji'nan city of Shandong province in 250002 District No. 53 Patentee before: China Heavy-Duty Car Group Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060531 Termination date: 20150521 |
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| EXPY | Termination of patent right or utility model |