CN102814434A - Method for axially feeding, extruding, rolling and forming spline shaft by medium-frequency and high-frequency sensing heating - Google Patents
Method for axially feeding, extruding, rolling and forming spline shaft by medium-frequency and high-frequency sensing heating Download PDFInfo
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- CN102814434A CN102814434A CN2012103035732A CN201210303573A CN102814434A CN 102814434 A CN102814434 A CN 102814434A CN 2012103035732 A CN2012103035732 A CN 2012103035732A CN 201210303573 A CN201210303573 A CN 201210303573A CN 102814434 A CN102814434 A CN 102814434A
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Abstract
The invention discloses a method for axially feeding, extruding, rolling and forming a spline shaft by medium-frequency and high-frequency sensing heating; firstly, a work piece is clamped; the surface of an end area of a spline section which is formed on the work piece is heated; an extrusion rolling forming mould extrudes, rolls and forms a section to be heated; the section to be heated enters a forming area of a medium-frequency and high-frequency sensing heater to be continuously heated under axial feeding motion; the extrusion rolling mould completes the extrusion rolling formation to splines on the work piece; the medium-frequency and high-frequency sensing heater is arranged between the extrusion rolling forming mould and a work piece clamping position; the medium-frequency and high-frequency sensing heater only heats the local area of a surface to have plastic deformation in the forming area of a part to have extrusion rolling deformation; and the method for axially feeding, extruding, rolling and forming the spline shaft by medium-frequency and high-frequency sensing heating has the advantages of small spline forming force, little heat loss, energy saving, capability of processing spline parts with large material deformation resistance, capability of processing slender shafts and large modulus, high formation precision and surface quality, high production efficiency, wide processing scope and the like.
Description
Technical field
The invention belongs to advanced material forming technique field, be specifically related to a kind of method of medium-high frequency eddy-current heating axial feed extruding rollforming splined shaft.
Background technology
Spline is to be used for the vital part of transmission power and moment of torsion in the mechanical system, and splined is used very extensive in automobile and various vehicle and equipment manufacture as a kind of linking intensity height, compact conformation, connecting mode that reliability is high.
Along with rapid development of automobile industry, the demand of high strength high accuracy spline, particularly long splined shaft increases day by day and instructions for use improves constantly, and the processing technology and the equipment of conventional spline has been proposed new challenge.The processing technology of spline mainly is divided into traditional cut and Plastic Forming processing; Shortcomings such as traditional spline cutting technology exists that cut intensity is high, productivity ratio is low, mechanical performance and surface quality difference; And spline rollforming technology ELEMENTARY INTRODUCTION TO NON category; Have high, the plurality of advantages such as shaping load is little, workpiece size stable accuracy, good product performance of production efficiency height, stock utilization, in the involute spline processing and manufacturing, be used widely.Yet splined shaft is to producing plastic deformation with the roller contact fully; Shaping load is high; Be difficult to be applicable to the processing of long splined shaft; High strength steel resistance of deformation under the room temperature is big in addition, makes big, the material flow difficulties of high strength steel spline cold rolling shaping load, and former transmission system and integral rigidity also face great challenge.
Warm working has been concentrated the advantage of cold forming and heat forming technology, not only can effectively reduce resistance of deformation, improves the metal material plastic forming ability; And avoided the hot forming energy consumption big, be prone to have produced overheated, oxidation, decarburization, and shortcoming such as allowance is big; Can obtain better products surface quality and high dimension precision.At present; Because the plurality of advantages of warm working; Numerous scholars have carried out extensive studies to this technology; Be applied to a lot of effects that a merging has obtained satisfaction of producing, for example warm drawing and forming, warm-extrusion forming, warm forging precision form etc., but also Warm Forming Technology is not applied in the plastic working technique of axial feed extruding rollforming spline.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art; The object of the present invention is to provide a kind of method of medium-high frequency eddy-current heating axial feed extruding rollforming splined shaft; The spline shaping load is little; Material flowability can be good, and can the rapidoprint resistance of deformation big, thin and long shafts and big modulus spline class part have forming accuracy and surface quality height, production efficiency is high, the range of work is wide, the advantage of highly versatile.
A kind of method of medium-high frequency eddy-current heating axial feed extruding rollforming splined shaft comprises the steps:
2.1, workpiece 2 is to the 5 direction feedings of extruding rollforming mould; The shaping spline segment gets in the medium-high frequency induction heater 4 on the workpiece 2; Medium-high frequency induction heater 4 is configured between extruding rollforming mould 5 and workpiece 2 clamping positions; The shaping spline segment aligns near extruding rollforming mould 5 one ends with medium-high frequency induction heater 4 near extruding rollforming mould 5 one ends on the workpiece 2
Hot zone length is that the length of medium-high frequency induction heater 4 bringing-up section a is L
a, medium-high frequency induction heater 4 is L near extruding rollforming mould 5 one ends with the length of pushing space section b between rollforming mould 5 end faces
b, the length of extruding rollforming mould 5 extruding rolling basil section c is L
c, length L
a, L
bAnd L
cSatisfy formula L
a=L
b>=L
c(1);
2.2, medium-high frequency induction heater 4 starts working, the surperficial zone of heating depth delta of shaping spline segment in bringing-up section a should satisfy formula Δ=r on the workpiece 2
Z-r
f+ (1.5 ~ 2.0) h;
In the formula: r
ZBe blank radius before the zone rolling of blank spline; r
fBe shaping spline tooth root radius; H is a shaping spline tooth overall height;
2.3, the temperature in the bringing-up section a in the surperficial zone of heating depth delta of workpiece reaches predetermined forming temperature T, be t its heat time heating time,
Forming temperature T is more than deformable material blue shortness district temperature, fully carries out the following warm working temperature of temperature of crystallization again; Or the hot forming temperature more than the temperature of fully carrying out crystallization again; Heat time heating time, t confirmed that the method for the shortest heat time heating time confirms that wherein workpiece centre temperature and surface layer temperatures difference Δ T select in the bringing-up section a in 200 ℃ ~ (T-50 ℃) scope when adopting electromagnetic induction heating in forge producing;
After the shaping spline segment all broke away from medium-high frequency induction heater 4 on the workpiece 2, medium-high frequency induction heater 4 quit work; Workpiece 2 by preceding top 1 and mould spline integrated top 3 carry out axial feed when clamping; Three extruding rollforming moulds 5 are along 120 ° of equidistant arrays of workpiece 2 circumferencial directions; Three extruding rollforming moulds 5 rotate synchronously in the same way; Extruding rollforming mould 5 radially is pressed into basil section c by increment and a rolling correction section d forms; Increment radially is pressed into the extruding rolling that basil section c carries out spline earlier, proofreaies and correct section d by rolling again and carries out the rolling correction;
Surperficial zone of heating depth delta in the bringing-up section a should satisfy formula Δ=r
Z-r
f+ (1.5 ~ 2.0) h; Workpiece 2 axial feed velocity v should satisfy formula
It is 6 ° ~ 9 ° that increment radially is pressed into basil angular range; The transmission that is meshing with each other of spline segment e on the mould spline integrated top 3 and extruding rollforming mould 5; Realize that shaping initial stage workpiece 2 extruding rollformings have with extruding rollforming mould 5 corresponding rotating speeds, the range of speeds of extruding rollforming mould 5 is 20RPM ~ 60RPM; Spline segment e on the mould spline integrated top 3 has identical dimensional structure with the spline that will be shaped, and the length of the spline segment e on the mould spline integrated top 3 is L
e, length L
eSatisfy formula L
e>L
b+ L
c
The present invention organically combines medium-high frequency eddy-current heating and axial feed extruding rollforming spline, realizes that the axial feed squeezing roll rolls into the long splined shaft of form height strength steel; The medium-high frequency induction heater only heats the partially-formed zone that is about to begin to push the rolling distortion between extruding rollforming mould and clamping workpiece position; The shaped region that axial feed motion gets into the medium-high frequency induction heater down heats continuously; The surface local zone heating of plastic deformation only to taking place in the medium-high frequency induction heater; Reduce thermal loss, save the energy; Can reduce the material deformation drag, improve the metal plastic deformation ability; The machinable material resistance of deformation is big, thin and long shafts and big modulus spline class part.
Description of drawings
Fig. 1 is a flow chart of the present invention.
Fig. 2 connects sketch map for equipment therefor of the present invention.
Fig. 3 is the axonometric drawing in medium-high frequency induction heater 4 of the present invention and extruding rollforming mould 5 zones.
Fig. 4 is the front view in medium-high frequency induction heater 4 of the present invention and extruding rollforming mould 5 zones.
Fig. 5 is workpiece 2 of the present invention and extruding rollforming mould 5 layouts and motion signal.
Fig. 6 pushes rollforming mould 5 axonometric drawings for the present invention.
Fig. 7 pushes rollforming mould 5 front views for the present invention.
Fig. 8 is integrated top 3 sketch mapes of mould spline of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done detailed description.
It is the 42CrMo high strength steel that present embodiment adopts the material of workpiece 2, and three extruding rollforming moulds 5 rotate synchronously in the same way.
With reference to Fig. 1, a kind of method of medium-high frequency eddy-current heating axial feed extruding rollforming splined shaft comprises the steps:
2.1, workpiece 2 is to the 5 direction feedings of extruding rollforming mould; The shaping spline segment gets in the medium-high frequency induction heater 4 on the workpiece 2; With reference to Fig. 2, medium-high frequency induction heater 4 is configured between extruding rollforming mould 5 and workpiece 2 clamping positions, and the shaping spline segment aligns near extruding rollforming mould 5 one ends with medium-high frequency induction heater 4 near extruding rollforming mould 5 one ends on the workpiece 2; With reference to Fig. 3
With reference to Fig. 4, hot zone length is that the length of medium-high frequency induction heater 4 bringing-up section a is L
a, medium-high frequency induction heater 4 is L near extruding rollforming mould 5 one ends with the length of pushing space section b between rollforming mould 5 end faces
b, the length of extruding rollforming mould 5 extruding rolling basil section c is L
c, length L
a, L
bAnd L
cSatisfy formula L
a=L
b>=L
c
2.2, medium-high frequency induction heater 4 starts working, the surperficial zone of heating depth delta of shaping spline segment in bringing-up section a should satisfy formula Δ=r on the workpiece 2
Z-r
f+ (1.5 ~ 2.0) h;
In the formula: r
ZBe blank radius before the zone rolling of blank spline; r
fBe shaping spline tooth root radius; H is a shaping spline tooth overall height;
2.3, the temperature in the bringing-up section a in the surperficial zone of heating depth delta of workpiece reaches predetermined forming temperature T, be t its heat time heating time,
Forming temperature T is more than deformable material blue shortness district temperature, fully carries out the following warm working temperature of temperature of crystallization again, is specially 700 ℃; Heat time heating time, t confirmed that the method for the shortest heat time heating time confirms that wherein workpiece centre temperature and surface layer temperatures difference Δ T select in the bringing-up section a in 201 ℃ ~ 650 ℃ scopes when adopting electromagnetic induction heating in forge producing;
After the shaping spline segment all broke away from medium-high frequency induction heater 4 on the workpiece 2, medium-high frequency induction heater 4 quit work; Workpiece 2 by preceding top 1 and mould spline integrated top 3 carry out axial feed when clamping; Three extruding rollforming moulds 5 along 120 ° of equidistant arrays of workpiece 2 circumferencial directions rotate synchronously in the same way; With reference to Fig. 5; Extruding rollforming mould 5 radially is pressed into basil section c by increment and a rolling correction section d forms; With reference to Fig. 6, increment radially is pressed into the extruding rolling that basil section c carries out spline earlier, proofreaies and correct section d by rolling again and carries out the rolling correction;
Surperficial zone of heating depth delta in the bringing-up section a should satisfy formula Δ=r
Z-r
f+ (1.5 ~ 2.0) h; Workpiece 2 axial feed velocity v should satisfy formula
It is 6 ° ~ 9 ° that increment radially is pressed into basil angular range, with reference to Fig. 7, in the present embodiment is 7 °; Spline segment e on the mould spline integrated top 3; With reference to Fig. 8; The transmission that is meshing with each other of spline segment e and extruding rollforming mould 5 realizes that shaping initial stage workpiece 2 extruding rollformings have with extruding rollforming mould 5 corresponding rotating speeds, and the rotating speed of extruding rollforming mould 5 is 30RPM; Spline segment e on the mould spline integrated top 3 has identical dimensional structure with the spline that will be shaped, and the length of the spline segment e on the mould spline integrated top 3 is L
e, length L
eSatisfy formula L
e>L
b+ L
c
Claims (1)
1. the method for a medium-high frequency eddy-current heating axial feed extruding rollforming splined shaft is characterized in that, comprises the steps:
Step 1, clamping workpiece (2), workpiece (2) is clamped by preceding top (1) and mould spline integrated top (3), makes the theoretical reference circle of workpiece (2) tangent with the reference circle of extruding rollforming mould (5);
Step 2, workpiece (2) go up the heating of shaping spline segment end regions surface local,
2.1, workpiece (2) is to extruding rollforming mould (5) direction feeding; Workpiece (2) is gone up the shaping spline segment and is got in the medium-high frequency induction heater (4); Medium-high frequency induction heater (4) is configured between extruding rollforming mould (5) and workpiece (2) clamping position; Workpiece (2) is gone up the shaping spline segment and is alignd near extruding rollforming mould (5) one ends with medium-high frequency induction heater (4) near extruding rollforming mould (5) one ends
Hot zone length is that the length of medium-high frequency induction heater (4) bringing-up section a is L
a, medium-high frequency induction heater (4) is L near extruding rollforming mould (5) one ends with the length of pushing space section b between rollforming mould (5) end face
b, the length of extruding rollforming mould (5) extruding rolling basil section c is L
c, length L
a, L
bAnd L
cSatisfy formula L
a=L
b>=L
c
2.2, medium-high frequency induction heater (4) starts working, workpiece (2) is gone up the surperficial zone of heating depth delta of shaping spline segment in bringing-up section a should satisfy formula Δ=r
Z-r
f+ (1.5 ~ 2.0) h;
In the formula: r
ZBe blank radius before the zone rolling of blank spline; r
fBe shaping spline tooth root radius; H is a shaping spline tooth overall height;
2.3, the temperature in the bringing-up section a in the surperficial zone of heating depth delta of workpiece reaches predetermined forming temperature T, be t its heat time heating time,
Forming temperature T is more than deformable material blue shortness district temperature, fully carries out the following warm working temperature of temperature of crystallization again; Or the hot forming temperature more than the temperature of fully carrying out crystallization again; Heat time heating time, t confirmed that the method for the shortest heat time heating time confirms that wherein workpiece centre temperature and surface layer temperatures difference Δ T select in the bringing-up section a in 200 ℃ ~ (T-50 ℃) scope when adopting electromagnetic induction heating in forge producing;
Step 3, continuous medium-high frequency eddy-current heating and axial feed, by the extruding rollforming of extruding rollforming mould (5) completion workpiece (2) upper spline,
After shaping spline segment on the workpiece () 2 all broke away from medium-high frequency induction heater (4), medium-high frequency induction heater (4) quit work; Workpiece (2) carries out axial feed when being clamped by preceding top (1) and mould spline integrated top (3); Three extruding rollforming moulds (5) are along 120 ° of equidistant arrays of workpiece (2) circumferencial direction; Three extruding rollforming moulds (5) rotate synchronously in the same way; Extruding rollforming mould (5) radially is pressed into basil section c by increment and a rolling correction section d forms; Increment radially is pressed into the extruding rolling that basil section c carries out spline earlier, proofreaies and correct section d by rolling again and carries out the rolling correction;
Surperficial zone of heating depth delta in the bringing-up section a should satisfy formula Δ=r
Z-r
f+ (1.5 ~ 2.0) h; Workpiece (2) axial feed velocity v should satisfy formula
It is 6 ° ~ 9 ° that increment radially is pressed into basil angular range; Spline segment e on the mould spline integrated top (3) and extruding rollforming mould (5) transmission that is meshing with each other; Realize that shaping initial stage workpiece (2) extruding rollforming has with the corresponding rotating speed of extruding rollforming mould (5), the range of speeds of extruding rollforming mould (5) is 20RPM ~ 60RPM; Spline segment e on the mould spline integrated top (3) has identical dimensional structure with the spline that will be shaped, and the length of the spline segment e on the mould spline integrated top (3) is L
e, length L
eSatisfy formula L
e>L
b+ L
c
Step 4, workpiece (2) are clamped by preceding top (1) and mould spline integrated top (3) and oppositely withdraw from discharging simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210303573.2A CN102814434B (en) | 2012-08-24 | 2012-08-24 | Method for axially feeding, extruding, rolling and forming spline shaft by medium-frequency and high-frequency sensing heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210303573.2A CN102814434B (en) | 2012-08-24 | 2012-08-24 | Method for axially feeding, extruding, rolling and forming spline shaft by medium-frequency and high-frequency sensing heating |
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| Publication Number | Publication Date |
|---|---|
| CN102814434A true CN102814434A (en) | 2012-12-12 |
| CN102814434B CN102814434B (en) | 2014-04-23 |
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|---|---|---|---|
| CN201210303573.2A Active CN102814434B (en) | 2012-08-24 | 2012-08-24 | Method for axially feeding, extruding, rolling and forming spline shaft by medium-frequency and high-frequency sensing heating |
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Cited By (5)
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|---|---|---|---|---|
| CN103191964A (en) * | 2013-03-14 | 2013-07-10 | 西安交通大学 | Servo direct-drive type incremental rolling forming process for cylindrical piece with teeth inside and outside |
| CN103230990A (en) * | 2013-03-14 | 2013-08-07 | 西安交通大学 | Multidirectional composite vibration incremental type rolling and forming device and technology thereof |
| CN103752741A (en) * | 2014-01-10 | 2014-04-30 | 西安交通大学 | Method from a driving rotating shaft to feeding three die to roll to form screw element |
| CN113579138A (en) * | 2021-06-11 | 2021-11-02 | 福建恒劲科技有限公司 | Insulated Gate Bipolar Transistor (IGBT) electric heating spline warm extrusion forming complete equipment and forming process |
| CN113996874A (en) * | 2021-12-03 | 2022-02-01 | 中机生产力促进中心 | RPV main bolt external thread three-axis rolling processing parameter obtaining method |
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| EP1538227A1 (en) * | 2003-12-03 | 2005-06-08 | Daido Tokushuko Kabushiki Kaisha | Mechanical structural shaft component and method of manufacturing the same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103191964A (en) * | 2013-03-14 | 2013-07-10 | 西安交通大学 | Servo direct-drive type incremental rolling forming process for cylindrical piece with teeth inside and outside |
| CN103230990A (en) * | 2013-03-14 | 2013-08-07 | 西安交通大学 | Multidirectional composite vibration incremental type rolling and forming device and technology thereof |
| CN103752741A (en) * | 2014-01-10 | 2014-04-30 | 西安交通大学 | Method from a driving rotating shaft to feeding three die to roll to form screw element |
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| CN113579138A (en) * | 2021-06-11 | 2021-11-02 | 福建恒劲科技有限公司 | Insulated Gate Bipolar Transistor (IGBT) electric heating spline warm extrusion forming complete equipment and forming process |
| CN113579138B (en) * | 2021-06-11 | 2023-02-28 | 福建恒劲科技有限公司 | Insulated Gate Bipolar Transistor (IGBT) electric heating spline warm extrusion forming complete equipment and forming process |
| CN113996874A (en) * | 2021-12-03 | 2022-02-01 | 中机生产力促进中心 | RPV main bolt external thread three-axis rolling processing parameter obtaining method |
| CN113996874B (en) * | 2021-12-03 | 2022-09-06 | 中机生产力促进中心有限公司 | RPV main bolt external thread three-axis rolling processing parameter obtaining method |
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Effective date of registration: 20221014 Address after: 710115 Room 1035, 1st Floor, Jugou Hongde Building, No. 20, West China Innovation Port, Fengxi New Town, Xixian New District, Xi'an, Shaanxi Patentee after: Shaanxi Gezhi Jingcheng Intelligent Manufacturing Co.,Ltd. Address before: Beilin District Xianning West Road 710049, Shaanxi city of Xi'an province No. 28 Patentee before: XI'AN JIAOTONG University |