CN106256460A - 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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- CN106256460A CN106256460A CN201610846924.2A CN201610846924A CN106256460A CN 106256460 A CN106256460 A CN 106256460A CN 201610846924 A CN201610846924 A CN 201610846924A CN 106256460 A CN106256460 A CN 106256460A
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- tooth
- rolling die
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- rolling
- blank
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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
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- 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 open a kind of involute gear rolling die of the present invention and forming technology, rolling die includes parallel and spaced first rolling die and the second rolling die, and the number of teeth of two moulds is the most identical with modulus；The 0th passage tooth region, the 1st passage tooth region, the 2nd passage tooth region it is sequentially provided with ... N passage tooth region on first rolling die；Flute profile in every a time tooth region is identical；First rolling die and the second rolling die structure are identical, and profile of tooth all uses involute；Arranging on the first rolling die clockwise to N passage tooth region in 0th passage tooth region, arranges clockwise on the second rolling die.Blank is carried out pinpointing rolling by the present invention, and the centre-to-centre spacing between rolling die fixes, and in forming process, rolling die is without radial feed, and blank stress equalization, accurate positioning, inhomogeneous deformation are few；Use speed forced synchronism rolling mode, it is achieved the dynamic indexing of profile of tooth in forming process, eliminate the total cumulative pitch error that free indexing rolling causes.
Description
Technical field
The present invention relates to gear machining technology field, be specifically related to a kind of involute gear rolling die and forming technology.
Background technology
Gear rolling shaping generally refers to blank and produces continuous plasticity under the effect of a pair homodromal profile of tooth mould
Deformation obtains the plastic forming process of required gear forgings or forging stock.Adopt the technology that at present cylindrical blank is placed in right
Claiming between the rolling die of two band external tooths of installation, in roll-forming process, mould synchronizes, synchronized, rotating Vortex, and along base
Material radial feed, drives blank to rotate under the effect of moment of friction, and mould profile of tooth is pressed into blank top layer continuously simultaneously, makes top layer
Metal material generation plastic deformation, tooth depth is continuously increased and shapes gear.
Existing shaping rolling method, when being to complete with rolling, the profile of tooth of mould is entered by mould with the engagement of gear
Row design, the most only considers the pitch on mould basic circle, or the pitch on pitch circle, considers that tooth top pitch is (the most adjacent the most especially
Pitch between the tooth crest of tooth) design mould, when there is every time rolling, the tooth of mould and absorption surface position are in work
The shortcoming of variation on part circumferencial direction, the position of the teeth groove i.e. formed on workpiece in the starting stage shaping rolling process is not
Stable.Adopt the mould designed in this way, in addition to shaping the inappropriate teeth groove of shape, and due to workpiece
Unnecessary plastic deformation, causes the precision of the gear shaped and mechanical performance to decline.
Summary of the invention
It is an object of the invention to provide a kind of involute gear rolling die and forming technology, to overcome in prior art
The overproof problem with hydraulic performance decline of profile accuracy that unidirectional rolling time-division tooth inequality causes；In the present invention, blank stress equalization, fixed
Level is true, inhomogeneous deformation is few.
In order to achieve the above object, the technical scheme that the present invention takes is:
A kind of involute gear rolling die, including the first rolling die and the second rolling die, the first rolling die, the
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 is parallel and
Every setting；The 0th passage tooth region, the 1st passage tooth region, the 2nd passage tooth region it is sequentially provided with ... N on first rolling die
Passage tooth region；Flute profile in every a time tooth region is identical；First rolling die and the second rolling die structure are identical, profile of tooth
All use involute；Arrange on the first rolling die clockwise to N passage tooth region in 0th passage tooth region, in the second rolling
Roll and arrange clockwise on mould.
Further, the tooth depth of the tooth in the 0th passage tooth region is h0, at the first rolling die and the second rolling die
Breach is formed, it is simple to blank is put between tool；Tooth in 0th passage tooth region is respectively positioned in reference circle.
Further, the tooth depth of the tooth in the 1st passage tooth region is h1；Tooth in 1st passage tooth region reference circle with
Interior profile of tooth has the initial pressure angle α bigger than target profile of tooth pressure angle α1, and the profile of tooth beyond reference circle has and compares target
Initial pressure angle α little for profile of tooth pressure angle α1'；
The tooth depth of the tooth in the 2nd passage tooth region is h2；The tooth in 2nd passage tooth region profile of tooth within reference circle is gathered around
There is the initial pressure angle α bigger than target profile of tooth pressure angle α2, and the profile of tooth beyond reference circle has than target profile of tooth pressure angle α
Little initial pressure angle α2' ... the tooth depth of the tooth in N passage tooth region is hN；Tooth in N passage tooth region is at reference circle
Within the initial pressure angle α that has of profile of toothNEqual to target profile of tooth pressure angle α, and at the beginning of the profile of tooth beyond reference circle has
Beginning pressure angle αN' equal to target profile of tooth pressure angle α, wherein, h0<h1<h2<……<hN=h, α1>α2……>αN=α, α1'<
α2'……<αN'=α；H is the tooth depth of the target gear obtained after blank rolls, 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 the modulus of the target gear obtained after the second rolling die rolling are Z2, m；Except the 0th passage and N passage tooth region
Outward, 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 tooth region, in remaining passage tooth region
Each tooth nips side outside pitch line length higher than receding side outside pitch line length.
Further, the differential seat angle between the tooth that the tooth on the first rolling die is corresponding with on the second rolling die is A degree；
Tooth on first rolling die nip moment of blank tooth corresponding with on the second rolling die nip blank moment between
Time difference is T；The anglec of rotation of the first rolling die corresponding to time difference T is B degree, A=180-B.
A kind of involute gear Roll-forming processes, comprises the following steps:
1) cylinder blank is placed in a pair the 0th passage tooth regions formation of the first rolling die and the second rolling die
In breach, blank passes through gripper mechanism grips；
2) the first rolling die and the second rolling die is synchronized, rotating in same direction, forces to drive blank by drive system
Clamping device and blank rotate, and make the rotating speed of blank and the rotating ratio of rolling die meet predetermined rotating ratio: Z1/Z2；
3), during the first rolling die and the second rolling die rotate, the rolling of the 1st passage, the first rolling die are entered
Have and contact with blank with first tooth in a pair the 1st passage tooth regions of the second rolling die and nip in blank；First rolling
Roll mould and the second rolling die is rotated further, until all teeth are nipped in blank and depart from the 1st passage tooth region, complete the
The rolling of 1 passage；
4) it is rotated further along with the first rolling die and the second rolling die, enters the rolling of the 2nd passage, the first rolling die
Have and contact with blank with first tooth in a pair the 2nd passage tooth regions of the second rolling die and nip in blank；First rolling
Roll mould and the second rolling die is rotated further, until all teeth are nipped in blank and depart from the 2nd passage tooth region, complete the
The rolling of 2 passages；
5) along with the first rolling die and the further rotation of the second rolling die, until all in N passage tooth region
Tooth is nipped in blank and departs from, and completes the rolling of N passage, returns to initial position, and now blank and rolling die disengage, and take out
Blank, rolling completes.
Relative to prior art, the method have the advantages that
1) blank is carried out pinpointing rolling by the present invention, 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；Use speed forced synchronism rolling mode, it is achieved
In forming process, the dynamic indexing of profile of tooth, eliminates the total cumulative pitch error that free indexing rolling causes.
2) rolling die uses the involute splined shaft multi-pass rollforming becoming profile of tooth, becoming drafts, controls rolling die
Tool contacts and the flowing of deformed area metal with blank, it is thus achieved that accurate splined shaft tooth profile, it is to avoid profile of tooth during unidirectional rolling
The overproof formation with lug of precision.
Accompanying drawing explanation
Fig. 1 is the forming technology schematic diagram of the present invention.
Fig. 2 is the 0th passage and the profile of tooth schematic diagram of the 1st passage intersection rolling die.
Fig. 3 is the 1st passage and the profile of tooth schematic diagram of the 2nd passage intersection rolling die；
Fig. 4 is N-1 passage and the profile of tooth schematic diagram of N passage intersection rolling die.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in detail.
Referring to shown in Fig. 1 to Fig. 3, one involute gear rolling die of the present invention, including the first rolling die 1 and
Two rolling dies 3, the number of teeth of first rolling die the 1, second rolling die 3 is identical, is Z1, and modulus is identical, is m；First
And the second rolling die 3 is parallel and interval is arranged for rolling die 1；Be sequentially provided with on first rolling die 1 the 0th passage tooth region,
1st passage tooth region, the 2nd passage tooth region ... N passage tooth region.Blank 2 is by the first rolling die 1 and the second rolling
The number of teeth and the modulus of the target gear obtained after mould 3 rolling are Z2, m.
Flute profile in every a time tooth region is identical.The tooth that tooth on first rolling die is corresponding with on the second rolling die
Between differential seat angle be A degree；Tooth on first rolling die moment of blank tooth corresponding with on the second rolling die of nipping is stung
Time difference between the moment entering blank is T；The anglec of rotation of the first rolling die corresponding to time difference T is B degree, A=
180-B。
Referring to shown in Fig. 2, in the 0th passage tooth region, the tooth depth of tooth 40 is h0, at the first rolling die 1 and second
Breach is formed, it is simple to blank 2 is put between rolling die 3.Tooth 40 is respectively positioned in reference circle 4.
In 1st passage tooth region, the tooth depth of tooth 41 is h1, the tooth 41 profile of tooth 61 within reference circle 4 has ratio target profile of tooth
6 initial pressure angle α big for pressure angle α1, and the profile of tooth 51 beyond reference circle has less than target profile of tooth 5 pressure angle α initial
Pressure angle α1' so that on blank, form bigger profile of tooth groove during pre-rolling；
Referring to shown in Fig. 3 and Fig. 4, in the 2nd passage tooth region, the tooth depth of tooth 42 is h2, tooth 42 is within reference circle 4
Profile of tooth 62 has the initial pressure angle α bigger than target profile of tooth 6 pressure angle α2, and the profile of tooth 52 beyond reference circle has and compares target
Initial pressure angle α little for profile of tooth 5 pressure angle α2' ... in N passage tooth region, the tooth depth of tooth 4N is hN, tooth 4N reference circle 4 with
The initial pressure angle α that interior profile of tooth 6N hasNEqual to target profile of tooth 6 pressure angle α, and what profile of tooth 5N beyond reference circle had
Initial pressure angle αN' equal to target profile of tooth 5 pressure angle α, wherein, h0<h1<h2<……<hN-1<hN=h, α1>α2……>αN=α,
α1'<α2'……<αN'=α；H is the tooth depth of the target gear obtained after blank rolls, and α is the pressure angle of target gear.
First rolling die 1 is identical with the second rolling die 3 structure, and profile of tooth all uses involute；0th passage tooth region is extremely
Arranging on the first rolling die 1 clockwise in N passage tooth region, arranges clockwise at the second rolling die 3；During work, the
One rolling die 1 and the second rolling die 3 synchronizes, synchronized, rotating Vortex.In addition to the 0th passage and N passage tooth 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 tooth region, each tooth in remaining passage tooth region nips side outside pitch line length higher than receding side outside pitch line length；The present invention
In each region in tooth depth h of tooth0、h1、h2、……hNMaximum tooth height for this tooth.
Refer to shown in Fig. 1 to Fig. 3, one involute gear Roll-forming processes of the present invention, comprise the following steps:
1) cylinder blank 2 is placed in a pair the 0th passage tooth region shapes of the first rolling die 1 and the second rolling die 3
In the breach become, blank 2 passes through gripper mechanism grips.
2) the first rolling die 1 and the second rolling die 3 is synchronized, rotating in same direction, forces to drive blank 2 by drive system
Clamping device and blank 2 rotate, make the rotating speed of blank 2 and the rotating ratio of rolling die meet predetermined rotating ratio: Z1/Z2；
3), during the first rolling die 1 and the second rolling die 3 rotate, the rolling of the 1st passage, the first rolling are entered
Mould 1 and first tooth 41 in a pair the 1st passage tooth regions of the second rolling die 3 contact with blank 2 and nip blank 2
In；First rolling die 1 and the second rolling die 3 are rotated further, until all teeth are nipped in blank 2 in the 1st passage tooth region
And depart from, complete the rolling of the 1st passage；
4) it is rotated further along with the first rolling die 1 and the second rolling die 3, enters the rolling of the 2nd passage, the first rolling
Mould 1 and first tooth 42 in a pair the 2nd passage tooth regions of the second rolling die 3 contact with blank 2 and nip blank 2
In；First rolling die 1 and the second rolling die 3 are rotated further, until all teeth are nipped in blank 2 in the 2nd passage tooth region
And depart from, complete the rolling of the 2nd passage；
5) along with the first rolling die 1 and the further rotation of the second rolling die 3, until institute in N passage tooth region
Having tooth nip in blank 2 and depart from, complete the rolling of N passage, return to initial position, now blank 2 and rolling die disengage,
Taking out blank 2, rolling completes.
Claims (8)
1. an involute gear rolling die, it is characterised in that include the first rolling die (1) and the second rolling die (3),
First rolling die (1), the second rolling die (3) the number of teeth identical, be Z1, modulus is identical, is m；First rolling die
(1) and the second rolling die (3) is parallel and interval is arranged；
The 0th passage tooth region, the 1st passage tooth region, the 2nd passage tooth region it is sequentially provided with ... N on first rolling die (1)
Passage tooth region；Flute profile in every a time tooth region is identical；N is positive integer；
First rolling die (1) is identical with the second rolling die (3) structure, and profile of tooth all uses involute；0th passage tooth region is extremely
N passage tooth region is in the upper arrangement clockwise of the first rolling die (1), in the upper arrangement clockwise of the second rolling die (3).
A kind of involute gear rolling die the most according to claim 1, it is characterised in that in the 0th passage tooth region
The tooth depth of tooth is h0, for forming breach between the first rolling die (1) and the second rolling die (3), it is simple to blank (2) is put
Enter；Tooth in 0th passage tooth region is respectively positioned in reference circle (4).
A kind of involute gear rolling die the most according to claim 1, it is characterised in that in the 1st passage tooth region
The tooth depth of tooth is h1；The tooth in 1st passage tooth region profile of tooth within reference circle (4) has bigger than target profile of tooth pressure angle α
Initial pressure angle α1, and the profile of tooth beyond reference circle has the initial pressure angle α less than target profile of tooth pressure angle α1'；
The tooth depth of the tooth in the 2nd passage tooth region is h2；The tooth in 2nd passage tooth region profile of tooth within reference circle (4) has
The initial pressure angle α bigger than target profile of tooth pressure angle α2, and the profile of tooth beyond reference circle has less than target profile of tooth pressure angle α
Initial pressure angle α2' ... the tooth depth of the tooth in N passage tooth region is hN；Tooth in N passage tooth region is at reference circle
(4) the initial pressure angle α that the profile of tooth within hasNEqual to target profile of tooth pressure angle α, and what the profile of tooth beyond reference circle had
Initial pressure angle αN' equal to target profile of tooth pressure angle α, wherein, h0<h1<h2<……<hN=h, α1>α2……>αN=α, α1'<
α2'……<αN'=α；H is the tooth depth of the target gear obtained after blank rolls, and α is the pressure angle of target gear.
A kind of involute gear rolling die the most according to claim 1, it is characterised in that the first rolling die (1) and
Second rolling die (3) synchronizes, synchronized, rotating Vortex.
A kind of involute gear rolling die the most according to claim 1, it is characterised in that blank (2) is positioned over first
Between rolling die (1) and the second rolling die (3), by obtaining after the first rolling die (1) and the second rolling die (3) rolling
The number of teeth and the modulus of the target gear obtained are Z2, m；In addition to the 0th passage and N passage tooth 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.
A kind of involute gear rolling die the most according to claim 1, it is characterised in that except the 0th passage and N passage
Outside tooth region, each tooth in remaining passage tooth region nips side outside pitch line length higher than receding side outside pitch line length.
A kind of involute gear rolling die the most according to claim 1, it is characterised in that on the first rolling die (1)
Tooth and the second rolling die (3) the most corresponding upper tooth between differential seat angle be A degree；Tooth on first rolling die (1) is nipped base
Moment and second rolling die (3) of material go up the most corresponding tooth nip blank moment between time difference be T；Time difference T institute is right
The anglec of rotation of the first rolling die (1) answered is B degree, A=180-B.
8. an involute gear Roll-forming processes, it is characterised in that based on according to any one of claim 1 to 7
Plant involute gear rolling die, comprise the following steps:
1) cylinder blank (2) is placed in a pair the 0th passage tooth regions of the first rolling die (1) and the second rolling die (3)
In the breach formed, blank (2) passes through gripper mechanism grips；
2) the first rolling die (1) and the second rolling die (3) is synchronized, rotating in same direction, forces to drive blank by drive system
(2) clamping device and blank (2) rotate, and make the rotating speed of blank (2) and the rotating ratio of rolling die meet predetermined rotating ratio:
Z1/Z2；
3), during the first rolling die (1) and the second rolling die (3) rotate, the rolling of (1st) passage, the first rolling are entered
Roll mould (1) contact with first tooth in a pair the 1st passage tooth regions of the second rolling die (3) with blank (2) and nip
In blank (2)；First rolling die (1) and the second rolling die (3) are rotated further, until all teeth in the 1st passage tooth region
Nip in blank (2) and depart from, completing the rolling of the 1st passage；
4) it is rotated further along with the first rolling die (1) and the second rolling die (3), enters the rolling of the 2nd passage, the first rolling
Mould (1) and first tooth in a pair the 2nd passage tooth regions of the second rolling die (3) contact with blank (2) and nip base
In material (2)；First rolling die (1) and the second rolling die (3) are rotated further, until all teeth are stung in the 2nd passage tooth region
Enter in blank (2) and depart from, completing the rolling of (2nd) passage；
5) along with the first rolling die (1) and the further rotation of the second rolling die (3), until institute in N passage tooth region
There is tooth nip in blank (2) and depart from, complete the rolling of N passage, return to initial position, now blank (2) and rolling die
Disengaging, take out blank (2), rolling completes.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
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| CN106256460A true CN106256460A (en) | 2016-12-28 |
| CN106256460B CN106256460B (en) | 2018-06-12 |
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| CN201610846924.2A Active CN106256460B (en) | 2016-09-23 | 2016-09-23 | A kind of involute gear rolling die and forming technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107626863A (en) * | 2017-09-21 | 2018-01-26 | 重庆大学 | A kind of rolling of gear axial direction becomes transverse tooth thickness mould |
| TWI820243B (en) * | 2018-11-15 | 2023-11-01 | 瑞士商恩斯特格羅布公司 | Apparatus and method for profiling workpieces by cold forming |
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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 |
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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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107626863A (en) * | 2017-09-21 | 2018-01-26 | 重庆大学 | A kind of rolling of gear axial direction becomes transverse tooth thickness mould |
| CN107626863B (en) * | 2017-09-21 | 2019-01-15 | 重庆大学 | A kind of gear axial direction rolling change transverse tooth thickness mold |
| TWI820243B (en) * | 2018-11-15 | 2023-11-01 | 瑞士商恩斯特格羅布公司 | Apparatus and method for profiling workpieces by cold forming |
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| Publication number | Publication date |
|---|---|
| CN106256460B (en) | 2018-06-12 |
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