CN106256460B - A kind of involute gear rolling die and forming technology - Google Patents
A kind of involute gear rolling die and forming technology Download PDFInfo
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- CN106256460B CN106256460B CN201610846924.2A CN201610846924A CN106256460B CN 106256460 B CN106256460 B CN 106256460B CN 201610846924 A CN201610846924 A CN 201610846924A CN 106256460 B CN106256460 B CN 106256460B
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- tooth
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H5/00—Making gear wheels, racks, spline shafts or worms
- B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
Abstract
The present invention discloses a kind of involute gear rolling die and forming technology, and rolling die includes being arranged in parallel and at interval the first rolling die and the second rolling die, the number of teeth of two molds and modulus all same；The 0th passage tooth region, the 1st passage tooth region, the 2nd passage tooth region ... N passage teeth region are equipped on first rolling die successively；Flute profile in per a time tooth region is identical；First rolling die and the second rolling die structure are identical, and tooth form uses involute；0th passage tooth region to N passage tooth regions are arranged clockwise on the first rolling die, are arranged clockwise on the second rolling die.The present invention carries out blank fixed point rolling, and the centre-to-centre spacing between rolling die is fixed, and for rolling die without radial feed, blank stress equalization, accurate positioning, inhomogeneous deformation are few in forming process；Using speed forced synchronism rolling mode, realize the dynamic indexing of tooth form during forming, eliminate total cumulative pitch error caused by free indexing rolling.
Description
Technical field
The present invention relates to gear machining technology fields, and in particular to a kind of involute gear rolling die and forming technology.
Background technology
Gear rolling forming generally refers to blank and generates continuous plasticity under the action of the tooth form mold of a pair of of rotating Vortex
Deformation obtains the plastic forming process of required gear forgings or forging stock.It adopts the technology that at present and is placed in cylindrical blank pair
Between two rolling dies with external tooth for claiming installation, in roll-forming process, mold is synchronous, synchronized, rotating Vortex, and along base
Expect radial feed, blank rotation is driven under the action of moment of friction, while mold tooth form is continuously pressed into blank surface layer, makes surface layer
Metal material is plastically deformed, and tooth height is continuously increased and shapes gear.
Existing forming rolling method, be when being completed with rolling the meshing state of mold and gear come to the tooth form of mold into
Row design, i.e., only consider the pitch on mold basic circle or the pitch on pitch circle, does not consider that tooth top pitch is (i.e. adjacent particularly
Pitch between the tooth crest of tooth) design mold, there is mold during every time rolling tooth with workpiece contact position in work
The shortcomings that being changed on part circumferencial direction is not that is, in the position of tooth socket that the starting stage of forming rolling process is formed on workpiece
Stable.The mold designed in this way, other than it can shape the inappropriate tooth socket of shape, and due to workpiece
Unnecessary plastic deformation, the precision and mechanical performance for leading to the gear shaped decline.
Invention content
The purpose of the present invention is to provide a kind of involute gear rolling die and forming technology, to overcome in the prior art
Profile accuracy caused by unidirectional rolling time-division tooth unevenness is overproof and the problem of hydraulic performance decline；In the present invention, blank stress equalization is determined
Level is true, inhomogeneous deformation is few.
In order to achieve the above object, the technical solution taken of the present invention is：
A kind of involute gear rolling die, including the first rolling die and the second rolling die, the first rolling die,
The number of teeth of two rolling dies is identical, is Z1, and modulus is identical, is m；First rolling die and the second rolling die it is parallel and
Every setting；The 0th passage tooth region, the 1st passage tooth region, the 2nd passage tooth region ... N are equipped on first rolling die successively
Passage tooth region；Flute profile in per a time tooth region is identical；First rolling die and the second rolling die structure are identical, tooth form
Use involute；0th passage tooth region to N passage tooth regions are arranged clockwise on the first rolling die, in the second rolling
It rolls and arranges clockwise on mold.
Further, a height of h of tooth of the tooth in the 0th passage tooth region0, in the first rolling die and the second rolling die
Notch is formed between tool, is put into convenient for blank；Tooth in 0th passage tooth region is respectively positioned in reference circle.
Further, a height of h of tooth of the tooth in the 1st passage tooth region1；Tooth in 1st passage tooth region reference circle with
Interior tooth form possesses the initial pressure angle α bigger than target tooth form pressure angle α1, and the tooth form other than reference circle possesses and compares target
Initial pressure angle α small tooth form pressure angle α1'；
The a height of h of tooth of tooth in 2nd passage tooth region2；Tooth form of the tooth within reference circle in 2nd passage tooth region is gathered around
There is the initial pressure angle α bigger than target tooth form pressure angle α2, and the tooth form other than reference circle possesses than target tooth form pressure angle α
Small initial pressure angle α2' ... a height of h of tooth of the tooth in N passage teeth regionN；Tooth in N passage teeth region is in reference circle
Within the initial pressure angle α that possesses of tooth formNEqual to target tooth form pressure angle α, and the tooth form other than reference circle possesses just
Beginning pressure angle αN' it is equal to target tooth form pressure angle α, wherein, h0<h1<h2<……<hN=h, α1>α2……>αN=α, α1'<
α2'……<αN'=α；H is that the tooth of target gear obtained after blank rolls is high, and α is the pressure angle of target gear.
Further, the first rolling die and the synchronization of the second rolling die, synchronized, rotating Vortex.
Further, blank is positioned between the first rolling die and the second rolling die, by the first rolling die and
The number of teeth and modulus of the target gear obtained after second rolling die rolling are Z2, m；Except the 0th passage and N passage teeth region
Outside, the number of teeth in remaining passage tooth region is more than or equal to the half of the tooth number Z 2 of target gear.
Further, along mold rotation direction, in addition to the 0th passage and N passage teeth region, in remaining passage tooth region
Each tooth bites side outside pitch line length higher than receding side outside pitch line length.
Further, the differential seat angle between tooth tooth corresponding on the second rolling die on the first rolling die is A degree；
Between at the time of tooth corresponding on the second rolling die bites blank at the time of tooth on first rolling die bites blank
Time difference is T；The rotation angle of the first rolling die corresponding to time difference T be B degree, A=180-B.
A kind of involute gear Roll-forming processes, include the following steps：
1) cylinder blank is placed in the 0th passage tooth region of a pair formation of the first rolling die and the second rolling die
In notch, blank passes through gripper mechanism grips；
2) the first rolling die and the second rolling die are synchronized, rotate in same direction, and force to drive blank by transmission system
Clamping device and blank rotation, make the rotating speed of blank and the rotating ratio of rolling die meet scheduled rotating ratio：Z1/Z2；
3) during the first rolling die and the second rolling die rotate, into the rolling of the 1st passage, the first rolling die
First tooth and blank in the 1st passage tooth region of a pair of tool and the second rolling die are contacted and are bitten in blank；First rolling
It rolls mold and the second rolling die is rotated further, bite in blank and be detached from until institute is with teeth in the 1st passage tooth region, complete the
The rolling of 1 passage；
4) as the first rolling die and the second rolling die are rotated further, into the rolling of the 2nd passage, the first rolling die
First tooth and blank in the 2nd passage tooth region of a pair of tool and the second rolling die are contacted and are bitten in blank；First rolling
It rolls mold and the second rolling die is rotated further, bite in blank and be detached from until institute is with teeth in the 2nd passage tooth region, complete the
The rolling of 2 passages；
5) with the further rotation of the first rolling die and the second rolling die, until owning in N passage teeth region
Tooth bites in blank and is detached from, and completes the rolling of N passages, returns to initial position, and blank and rolling die disengage at this time, take out
Blank, rolling are completed.
Relative to the prior art, the invention has the advantages that：
1) present invention carries out blank fixed point rolling, and the centre-to-centre spacing between rolling die is fixed, rolling die in forming process
Without radial feed, blank stress equalization, accurate positioning, inhomogeneous deformation are few；Using speed forced synchronism rolling mode, realize
The dynamic indexing of tooth form, eliminates total cumulative pitch error caused by free indexing rolling in forming process.
2) rolling die controls rolling die using the involute splined shaft multi-pass rollforming for becoming tooth form, becoming drafts
Have contact with blank and the flowing of deformed area metal, obtain accurate splined shaft tooth profile, tooth form when avoiding unidirectional rolling
The overproof formation with lug of precision.
Description of the drawings
Fig. 1 is the forming technology schematic diagram of the present invention.
Fig. 2 is the tooth form schematic diagram of the 0th passage and the 1st passage intersection rolling die.
Fig. 3 is the tooth form schematic diagram of the 1st passage and the 2nd passage intersection rolling die；
Fig. 4 is the tooth form schematic diagram of N-1 passages and N passage intersection rolling dies.
Specific embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
Shown in please referring to Fig.1 to Fig.3, a kind of involute gear rolling die of the present invention, including the first rolling die 1 and the
Two rolling dies 3, the first rolling die 1, the number of teeth of the second rolling die 3 are identical, are Z1, and modulus is identical, is m；First
Rolling die 1 and 3 parallel and interval setting of the second rolling die；On first rolling die 1 successively be equipped with the 0th passage tooth region,
1st passage tooth region, the 2nd passage tooth region ... N passage teeth region.Blank 2 passes through the first rolling die 1 and the second rolling
The number of teeth and modulus of the target gear obtained after 3 rolling of mold are Z2, m.
Flute profile in per a time tooth region is identical.Tooth tooth corresponding on the second rolling die on first rolling die
Between differential seat angle be A degree；Tooth corresponding on the second rolling die is stung at the time of tooth on first rolling die bites blank
Time difference between at the time of entering blank is T；The rotation angle of the first rolling die corresponding to time difference T be B degree, A=
180-B。
It please refers to shown in Fig. 2, a height of h of tooth of tooth 40 in the 0th passage tooth region0, in the first rolling die 1 and second
Notch is formed between rolling die 3, is put into convenient for blank 2.Tooth 40 is respectively positioned in reference circle 4.
The a height of h of tooth of tooth 41 in 1st passage tooth region1, tooth form 61 of the tooth 41 within reference circle 4 possess than target tooth form
Initial pressure angle α big 6 pressure angle α1, and the tooth form 51 other than reference circle possess it is smaller than 5 pressure angle α of target tooth form initial
Pressure angle α1' so that larger tooth form groove is formed during pre-rolling on blank；
It please refers to shown in Fig. 3 and Fig. 4, a height of h of tooth of tooth 42 in the 2nd passage tooth region2, tooth 42 is within reference circle 4
Tooth form 62 possesses the initial pressure angle α bigger than 6 pressure angle α of target tooth form2, and the tooth form 52 other than reference circle possesses and compares target
Initial pressure angle α small 5 pressure angle α of tooth form2' ... a height of h of tooth of tooth 4N in N passage teeth regionN, tooth 4N reference circle 4 with
The initial pressure angle α that interior tooth form 6N possessesNEqual to 6 pressure angle α of target tooth form, and what the tooth form 5N other than reference circle possessed
Initial pressure angle αN' it is equal to 5 pressure angle α of target tooth form, wherein, h0<h1<h2<……<hN-1<hN=h, α1>α2……>αN=α,
α1'<α2'……<αN'=α；H is that the tooth of target gear obtained after blank rolls is high, and α is the pressure angle of target gear.
First rolling die 1 is identical with 3 structure of the second rolling die, and tooth form uses involute；0th passage tooth region is extremely
N passage tooth regions are arranged clockwise on the first rolling die 1, in the second arrangement clockwise of rolling die 3；During work, the
One rolling die 1 is 3 synchronous with the second rolling die, at the same speed, rotating Vortex.In addition to the 0th passage and N passage teeth region, remaining
The number of teeth in passage tooth region is more than or equal to the half of the tooth number Z 2 of target gear.Along mold rotation direction, except the 0th passage and
Outside N passage teeth region, each tooth in remaining passage tooth region bites side outside pitch line length higher than receding side outside pitch line length；The present invention
In each region in tooth the high h of tooth0、h1、h2、……hNMaximum tooth height for the tooth.
Shown in please referring to Fig.1 to Fig.3, a kind of involute gear Roll-forming processes of the present invention include the following steps：
1) cylinder blank 2 is placed in the 0th passage tooth region shape of a pair of the first rolling die 1 and the second rolling die 3
Into notch in, blank 2 passes through gripper mechanism grips.
2) the first rolling die 1 and the second rolling die 3 are synchronized, rotate in same direction, and pass through transmission system and force to drive blank 2
Clamping device and blank 2 rotate, the rotating speed of blank 2 and the rotating ratio of rolling die is made to meet scheduled rotating ratio：Z1/Z2；
3) during the first rolling die 1 and the second rolling die 3 rotate, into the rolling of the 1st passage, the first rolling
First tooth 41 and blank 2 in the 1st passage tooth region of a pair of 1 and second rolling die 3 of mold contact and bite blank 2
In；First rolling die 1 and the second rolling die 3 are rotated further, and are bitten in blank 2 until institute is with teeth in the 1st passage tooth region
And be detached from, complete the rolling of the 1st passage；
4) as the first rolling die 1 and the second rolling die 3 are rotated further, into the rolling of the 2nd passage, the first rolling
First tooth 42 and blank 2 in the 2nd passage tooth region of a pair of 1 and second rolling die 3 of mold contact and bite blank 2
In；First rolling die 1 and the second rolling die 3 are rotated further, and are bitten in blank 2 until institute is with teeth in the 2nd passage tooth region
And be detached from, complete the rolling of the 2nd passage；
5) with the further rotation of the first rolling die 1 and the second rolling die 3, until institute in N passage teeth region
It is with teeth to bite in blank 2 and be detached from, the rolling of N passages is completed, returns to initial position, blank 2 and rolling die disengage at this time,
Blank 2 is taken out, rolling is completed.
Claims (6)
1. a kind of involute gear rolling die, which is characterized in that including the first rolling die (1) and the second rolling die (3),
First rolling die (1), the number of teeth of the second rolling die (3) are identical, are Z1, and modulus is identical, is m；First rolling die
(1) parallel with the second rolling die (3) and interval setting；
The 0th passage tooth region, the 1st passage tooth region, the 2nd passage tooth region ... N are equipped on first rolling die (1) successively
Passage tooth region；Flute profile in per a time tooth region is identical；N is positive integer；
First rolling die (1) is identical with the second rolling die (3) structure, and tooth form uses involute；0th passage tooth region is extremely
N passage tooth regions are arranged clockwise on the first rolling die (1), are arranged clockwise on the second rolling die (3)；
The a height of h of tooth of tooth in 0th passage tooth region0, for the shape between the first rolling die (1) and the second rolling die (3)
Into notch, it is put into convenient for blank (2)；Tooth in 0th passage tooth region is respectively positioned in reference circle (4)；
The a height of h of tooth of tooth in 1st passage tooth region1；Tooth form of the tooth within reference circle (4) in 1st passage tooth region possesses
The initial pressure angle α bigger than target tooth form pressure angle α1, and the tooth form other than reference circle possess it is smaller than target tooth form pressure angle α
Initial pressure angle α1'；
The a height of h of tooth of tooth in 2nd passage tooth region2；Tooth form of the tooth within reference circle (4) in 2nd passage tooth region possesses
The initial pressure angle α bigger than target tooth form pressure angle α2, and the tooth form other than reference circle possess it is smaller than target tooth form pressure angle α
Initial pressure angle α2' ... a height of h of tooth of the tooth in N passage teeth regionN；Tooth in N passage teeth region is in reference circle
(4) the initial pressure angle α that the tooth form within possessesNEqual to target tooth form pressure angle α, and what the tooth form other than reference circle possessed
Initial pressure angle αN' it is equal to target tooth form pressure angle α, wherein, h0<h1<h2<……<hN=h, α1>α2……>αN=α, α1'<
α2'……<αN'=α；H is that the tooth of target gear obtained after blank rolls is high, and α is the pressure angle of target gear.
2. a kind of involute gear rolling die according to claim 1, which is characterized in that the first rolling die (1) and
Second rolling die (3) is synchronous, synchronized, rotating Vortex.
3. a kind of involute gear rolling die according to claim 1, which is characterized in that blank (2) is positioned over first
Between rolling die (1) and the second rolling die (3), by being obtained after the first rolling die (1) and the second rolling die (3) rolling
The number of teeth and modulus of the target gear obtained are Z2, m；In addition to the 0th passage and N passage teeth region, in remaining passage tooth region
The number of teeth is more than or equal to the half of the tooth number Z 2 of target gear.
4. a kind of involute gear rolling die according to claim 1, which is characterized in that except the 0th passage and N passages
Outside tooth region, each tooth in remaining passage tooth region bites side outside pitch line length higher than receding side outside pitch line length.
5. a kind of involute gear rolling die according to claim 1, which is characterized in that on the first rolling die (1)
Tooth and corresponding tooth on the second rolling die (3) between differential seat angle be A degree；Tooth on first rolling die (1) bites base
Time difference between at the time of blank is bitten with corresponding tooth on the second rolling die (3) at the time of material is T；Time difference T, institute was right
The rotation angle of the first rolling die (1) answered be B degree, A=180-B.
6. a kind of involute gear Roll-forming processes, which is characterized in that based on one described in any one of claim 1 to 5
Kind involute gear rolling die, includes the following steps：
1) cylinder blank (2) is placed in the 0th passage tooth region of a pair of the first rolling die (1) and the second rolling die (3)
In the notch of formation, blank (2) passes through gripper mechanism grips；
2) the first rolling die (1) and the second rolling die (3) are synchronized, rotate in same direction, and force to drive blank by transmission system
(2) clamping device and blank (2) rotation, make the rotating speed of blank (2) and the rotating ratio of rolling die meet scheduled rotating ratio：
Z1/Z2；
3) during the first rolling die (1) and the second rolling die (3) rotate, into the rolling of the 1st passage, the first rolling
First tooth and blank (2) in the 1st passage tooth region of a pair of mold (1) and the second rolling die (3) contact and bite base
Expect in (2)；First rolling die (1) and the second rolling die (3) are rotated further, and are stung until institute is with teeth in the 1st passage tooth region
Enter in blank (2) and be detached from, complete the rolling of the 1st passage；
4) as the first rolling die (1) and the second rolling die (3) are rotated further, into the rolling of the 2nd passage, the first rolling
First tooth and blank (2) in the 2nd passage tooth region of a pair of mold (1) and the second rolling die (3) contact and bite base
Expect in (2)；First rolling die (1) and the second rolling die (3) are rotated further, and are stung until institute is with teeth in the 2nd passage tooth region
Enter in blank (2) and be detached from, complete the rolling of the 2nd passage；
5) with the further rotation of the first rolling die (1) and the second rolling die (3), until institute in N passage teeth region
It is with teeth to bite in blank (2) and be detached from, the rolling of N passages is completed, returns to initial position, at this time blank (2) and rolling die
It disengages, takes out blank (2), rolling is completed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610846924.2A CN106256460B (en) | 2016-09-23 | 2016-09-23 | A kind of involute gear rolling die and forming technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610846924.2A CN106256460B (en) | 2016-09-23 | 2016-09-23 | A kind of involute gear rolling die and forming technology |
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| CN106256460A CN106256460A (en) | 2016-12-28 |
| CN106256460B true CN106256460B (en) | 2018-06-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107626863B (en) * | 2017-09-21 | 2019-01-15 | 重庆大学 | A kind of gear axial direction rolling change transverse tooth thickness mold |
| CH714772A1 (en) * | 2018-11-15 | 2019-09-13 | Grob Ernst Fa | Device and method for cold forming profiling of workpieces. |
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|---|---|---|---|---|
| JPS62179842A (en) * | 1986-02-04 | 1987-08-07 | Nachi Fujikoshi Corp | Finish thread rolling method for gear |
| CN102294419A (en) * | 2010-06-15 | 2011-12-28 | 爱信精机株式会社 | Form rolling method for involute gear |
| CN102527797A (en) * | 2011-12-16 | 2012-07-04 | 西安交通大学 | Spline incremental type extrusion rolling composite forming machine |
| CN104438993A (en) * | 2014-10-22 | 2015-03-25 | 山东大学 | Gear rolling forming method for overcoming tooth-form lug defect |
| CN105473252A (en) * | 2013-07-23 | 2016-04-06 | 株式会社日精 | Rolling machine and gear rolling method using said rolling machine |
| CN206046960U (en) * | 2016-09-23 | 2017-03-29 | 西安建筑科技大学 | A kind of involute gear rolling die |
-
2016
- 2016-09-23 CN CN201610846924.2A patent/CN106256460B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62179842A (en) * | 1986-02-04 | 1987-08-07 | Nachi Fujikoshi Corp | Finish thread rolling method for gear |
| CN102294419A (en) * | 2010-06-15 | 2011-12-28 | 爱信精机株式会社 | Form rolling method for involute gear |
| CN102527797A (en) * | 2011-12-16 | 2012-07-04 | 西安交通大学 | Spline incremental type extrusion rolling composite forming machine |
| CN105473252A (en) * | 2013-07-23 | 2016-04-06 | 株式会社日精 | Rolling machine and gear rolling method using said rolling machine |
| CN104438993A (en) * | 2014-10-22 | 2015-03-25 | 山东大学 | Gear rolling forming method for overcoming tooth-form lug defect |
| CN206046960U (en) * | 2016-09-23 | 2017-03-29 | 西安建筑科技大学 | A kind of involute gear rolling die |
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| CN106256460A (en) | 2016-12-28 |
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