CN109702068A - A kind of core model applied in aluminium alloy wheel hub spinning process and technique - Google Patents
A kind of core model applied in aluminium alloy wheel hub spinning process and technique Download PDFInfo
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- CN109702068A CN109702068A CN201910137531.8A CN201910137531A CN109702068A CN 109702068 A CN109702068 A CN 109702068A CN 201910137531 A CN201910137531 A CN 201910137531A CN 109702068 A CN109702068 A CN 109702068A
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- spinning
- spinning roller
- retainer
- forming
- inner rim
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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Abstract
The invention discloses the mold core models applied in a kind of aluminium alloy wheel hub spinning process and technique, to solve the problems, such as that mechanical performance is insufficient at aluminum-alloy wheel inner rim under existing spinning process, the 1# forming spinning roller in existing " three spinning rollers, three passage " technique is replaced with into 4# retainer spinning roller first.In spinning process, under the collective effect of retainer spinning roller and forming spinning roller, blank free end material is made free end material generate certain predeformation by certain upset effect of extruding.Wide-angle corner structure unclosed at prior art core mould inner rim is improved to closed pyramidal slip face structure simultaneously, the material mobility status at the position in wheel spinning process can be improved, optimizes deformation uniformity, promotes the performance at inner rim.The present invention can increase the total deformation of material at wheel drip molding inner rim, improve material flow condition in spin-forming procedure and reduce the amount of machining after forming, reach the target for improving wheel drip molding inner rim position performance.
Description
Technical field
The invention belongs to aluminum-alloy wheel manufacturing field, applied in specially a kind of aluminium alloy wheel hub spinning process and technique
Core model.
Background technique
With the development of automotive light weight technology, aluminium alloy using more and more extensive, is especially embodied in aluminium conjunction in automobile industry
The application of golden wheel.Late 1990s, rotary pressure technology start the forming for being applied to casting wheel drop center portion position, that is, take turns
Spoke is shaped by low pressure casting, and wheel rim is shaped by shear spinning.
Low pressure casting+wheel rim hot spinning is safer, economic, efficient method in current wheel hub processing, has been obtained extensively
Using.Low pressure casting meets appearance demand, and wheel rim is shaped by hot spinning, and crystal grain refinement, tissue generates apparent fiber stream
Line, casting flaw such as: loose, shrinkage cavity pass through spinning after disappear, rim strength and elongation percentage are significantly improved, and improve vehicle
The overall performance and corrosion resistance of wheel.
The country generally takes " three spinning rollers, three passage " spinning process at present, and upper mold compression slab when spinning makes slab and core
Mould synchronous rotary, spoke, which mainly serves, to be fixed and supported.Spinning roller carries out part to rim according to the track of Programming and connects
Continuous rotary squeezing is allowed to close with mold shape face paste, and then shapes wheel rim.
Fig. 1 is a kind of existing " three spinning rollers, three passage " spinning process schematic diagram.From figure 1 it appears that blank 3 passes through
Upper mold 1 and the assembly of core model 6 clamp, and can rotate with core model.The distribution of three spinning rollers is as shown in figure 5,2# spinning roller and 3# spinning roller are in
180 ° are arranged symmetrically, and symmetrical centre face is the axial centre face of core model, and the angle between 1# spinning roller and 2#, 3# spinning roller is 90 °.
Tri- spinning roller of 1#, 2#, 3# successively carries out asymmetric stepped spinning according to Roller locus 3,4,5 shown in Fig. 1 respectively.Fig. 6 is three
The structural schematic diagram of a spinning roller.Fig. 7 is each spinning roller machining path and core mold structure partial enlargement diagram.1# spinning roller completes first
Passage spinning, 2# spinning roller complete the second passage spinning, and 3# spinning roller completes third passage spinning.
Since rim axial cross section differs greatly, led in forming process vulnerable to deflection and temperature profile effect
The uneven distribution of microstructure and property is caused, so as to cause Local Property decline.In above-mentioned technique rotary pressing processing, because of inner rim position
Structure is complicated, and spinning roller distributed architecture, machining locus and spinning mold core mold structure prevent inner rim part material from preferable
Mold is unable to fully deformed.And the A356 casting ingot that rotation wheel is selected is cast, since its microstructure form is mainly featheriness
Or coarse acicular structure, and possible casting flaw can make its mechanical property poor and unstable.If being processed in subsequent moulding
Middle deformation is insufficient uniformly, is easy to cause drip molding performance insufficient.Therefore, the casting rotation wheel lubrication groove produced under above-mentioned spinning process
Edge position mechanical performance is much lower compared with wheel rim position, to affect the overall mechanical properties of wheel rim.
Summary of the invention
The purpose of the present invention is to provide a kind of spinning process and technique that can improve mechanical performance at aluminium alloy inner rim
The mold core model of middle application.
This aluminium alloy wheel hub spinning process provided by the invention, is arranged three spinning rollers, one of them is progress preform
Retainer spinning roller, other two is forming spinning roller, and retainer spinning roller and forming spinning roller cooperation make blank free end squeeze upset pre- change
Then shape completes the mould pressing at inner rim position by forming spinning roller, comprising the following steps:
(1) blank is clamped by upper mold and core model, rotates blank can with core model；
(2) two forming spinning rollers are arranged symmetrically about core model axial centre face, retainer spinning roller is arranged in two formings rotation
On the symmetrical centre face of wheel；
(3) the upset predeformation amount of blank is set；
(4) the feeding track, the initial amount of feeding and retainer of three spinning rollers are set separately according to the upset predeformation amount of blank
Spinning roller reaches the residence time of initial amount of feeding position；
(5) rotate core model with blank；
(6) so that retainer spinning roller and two forming spinning rollers is rotated and feed the initial amount of feeding by setting time gap, make
Feeding track of the retainer spinning roller rapidly along its setting is fed to retainer position position, and the time for stopping setting holds blank, makes
The upside of retainer spinning roller is flowed under the spinning squeezing action that blank free end material shapes spinning roller at two forward, shapes spinning roller
Continue to feed, until blank reaches the upset predeformation amount of setting；
(7) make the rapid withdrawing of retainer spinning roller；
(8) two forming spinning rollers is made to continue the mould pressing for completing inner rim part by the feeding track of setting.
In a kind of embodiment of above-mentioned technical proposal, the shape face structure at the retainer spinning roller retainer includes upper and lower circle
Intermediate incline between cambered surface and two arc surfaces.
This core model suitable for above-mentioned technique provided by the invention, it corresponds to the shape face knot of wheel rim inner rim shaping
Structure includes the sunken arcs face successively postponed from top to bottom, inclined-plane and upwarps arc surface, and it is horizontal flat for upwarping the outside of arc surface
Table top makes wheel rim inner rim mould pressing region form enclosed pyramidal slip face structure.
In a kind of embodiment of above-mentioned technical proposal, the corresponding height in the levelling bench face is lower than the inclined-plane upper end
Corresponding height.
The present invention is arranged one and carries out preformed retainer spinning roller, two forming spinning rollers totally three spinning rollers, to aluminium alloy vehicle
It takes turns wheel rim and carries out mould pressing, it is different from there is essence in the prior art " three spinning rollers, three passage " technique.In spin-forming procedure,
First by the common squeezing action of retainer spinning roller and forming spinning roller, it is extruded the free end material of blank upset, to make
Free end material generates certain predeformation；Then being spun at wheel rim inner rim is completed under the action of shaping spinning roller for two
Shape.Upset predeformation can not only effectively eliminate casting flaw, can also play the role of certain expanding, increase deformation to blank
Amount, keeps tissue more fine and close, reinforcing fiber streamline；The deformation heat that the big plastic deformation generated during upset generates makes to deform
Area generates temperature-rise effect, and certain temperature increases so that obtain certain temperature-compensating when at mould pressing inner rim, reduces material
Expect resistance of deformation.In order to improve the mechanical performance at wheel rim inner rim position, spinning mold core model is corresponded to the shape at inner rim position
Face structure is improved to sunken arcs face, inclined-plane and upwarps arc surface, while the outside for upwarping arc surface is levelling bench face, makes to take turns
Rim inner rim mould pressing region forms enclosed pyramidal slip face structure.Enclosed pyramidal slip face structure can make spinning at inner rim
Frictional flow resistance reduces when forming, while the part material can be made to form corresponding three-dimensional compressive stress when flowing and squeeze section,
Make material shape shape face with core model to fit closely, optimization deformation uniformity, the total deformation of material at increase inner rim, in promotion
Mechanical performance at wheel rim, moreover it is possible to the amount of machining after reducing forming.
Detailed description of the invention
Fig. 1 is the schematic diagram (non-cross-hatching) of existing " three spinning rollers, three passage " spinning process.
Fig. 2 is the structural schematic diagram of Fig. 1 core mould.
Fig. 3 is the portion the B enlarged diagram in Fig. 2.
Fig. 4 is the portion the A enlarged diagram in Fig. 1.
Fig. 5 is the three spinning roller distribution schematic diagrams of this prior art.
Fig. 6 is the structural schematic diagram of each spinning roller in Fig. 5.
Fig. 7 is the feeding track of each spinning roller and core model partial enlargement diagram in this prior art.
Fig. 8 is the spinning schematic diagram (non-cross-hatching) of one embodiment of the invention.
Fig. 9 is the structural schematic diagram of Fig. 8 core mould.
Figure 10 is the portion the D enlarged diagram in Fig. 9.
Figure 11 is the portion the C enlarged diagram in Fig. 8.
Figure 12 is the three spinning roller distribution schematic diagrams of the present embodiment.
Figure 13 is the structural schematic diagram of each spinning roller in Figure 12.
Figure 14 is the feeding track of each spinning roller and core model partial enlargement diagram in the present embodiment.
Serial number in figure:
1- upper mold, 2- blank, 3-1# spinning roller motion profile,
4-2# spinning roller motion profile, 5-3# spinning roller motion profile, 6- core model.
Specific embodiment
The present embodiment is improved for Fig. 1 to the prior art shown in Fig. 7 " three spinning rollers, three passage " spinning process.
It mainly includes two aspects that the equipment of the present embodiment, which is improved,.
The 4# in Figure 12 and Figure 13 is replaced on one side for 1# shown in the prior art Fig. 5 and Fig. 6 is shaped spinning roller
Retainer spinning roller, the shape face structure at retainer spinning roller retainer include the intermediate incline between upper and lower arc surface and two arc surfaces.Simultaneously
2# spinning roller motion profile in Figure 12 is changed to the 1# spinning roller motion profile in Fig. 7, keeps 3# spinning roller motion profile constant.By 4#
Retainer spinning roller motion profile is changed to No. 3 trajectory lines in Figure 14 (a).
On the other hand to improve to the core model in Fig. 1, Fig. 1 core mould is specially corresponded into aluminium alloy wheel rim
The open type wide-angle of shaping turns angled face structure and is improved to enclosed pyramidal slip face structure.
From Fig. 1 to Fig. 4 as can be seen that this spinning mold core model of the prior art corresponds to wheel rim inner rim shaping
Shape face structure is more curved surfaces that successively outside is postponed down.That is the position open type wide-angle corner structure.
The open type wide-angle corner structure of core model make at inner rim material flows in spin-forming procedure frictional resistance compared with
Greatly, it is unfavorable for the flowing of inner rim part material, has forming dead angle, and position material can not be fitted closely with mold shape face, institute
Not enough with material deformation at inner rim, so that the mechanical performance at inner rim position is insufficient.
It can be seen that the present embodiment in conjunction with Fig. 8 to Figure 11 and correspond to the shape face structure of wheel rim inner rim shaping from upper past
Under successively postpone sunken arcs face, inclined-plane and upwarp arc surface, the outside for upwarping arc surface is levelling bench face, and inclined-plane
Gradient is smaller, makes the corresponding height in levelling bench face lower than the corresponding height in the inclined-plane upper end.That is this improvement core model position
Shape face structure be enclosed pyramidal slip face structure.
The radius in the preferred sunken arcs face of the present embodiment be 8.1mm, preferably 59 ° of central angle, the preferred 17.4mm of chamfer length,
And preferably 28 ° of its angle between core model bottom surface, it upwarps arc surface and is synthesized using both ends, first to connect with inclined-plane upwarps section
It is preferred that radius is 6.9mm, preferably 52 ° of central angle, it is 9.6mm, the center of circle that second to connect with level table, which upwarps the preferred radius of section,
Preferably 50 ° of angle, meanwhile, second upwarps between section and levelling bench face through small arc surface transition.
The shape face structure of this core model inner rim shaping can make at inner rim what material in spin-forming procedure flowed to rub
It wipes resistance to reduce, forming situation improves, and eliminates forming dead angle, while the part material can be made to form corresponding three-dimensional pressure when flowing
Stress squeezes section, is bonded material completely with the forming shape face at the core model position, increases material material plastic deformation Dislocations and becomes
The ratio of shape is conducive to the formation of tissue streamline, increases the total deformation of material, so as to improve the mechanicalness at inner rim position
Energy.
Fig. 4 is the inner rim shape after existing mold mould pressing, and Figure 11 is after the present embodiment improves mold mould pressing
Inner rim shape.It is obvious that the mechanical performance of inner rim shape shown in Figure 11 can be better than the machinery of inner rim shape shown in Fig. 4
Performance.
Specific step is as follows for wheel rim mould pressing:
(1) blank 2 is clamped by upper mold 1 and core model 6, rotates blank can with core model；
(2) 2# and 3# forming spinning roller is arranged symmetrically about core model axial centre face, 4# retainer spinning roller is arranged in twenty percent
On the symmetrical centre face of shape spinning roller；
(3) the upset predeformation amount of blank is set；
(4) motion profile, the initial amount of feeding and retainer of three spinning rollers are set separately according to the upset predeformation amount of blank
Spinning roller reaches the residence time of initial amount of feeding position；
(5) rotate core model with blank；
(6) so that retainer spinning roller and two forming spinning rollers is rotated and feed the initial amount of feeding by setting time gap, make
4# retainer spinning roller rapidly No. 3 trajectory lines shown in Figure 14 a be fed to diagram retainer position (apart from blank lower end 35mm, away from
Centre of gyration 500mm), and the time for stopping setting holds blank, and blank free end material is made to shape the spinning of spinning roller at two
The upside of 4# retainer spinning roller is flowed under squeezing action forward, forming spinning roller continues to feed, until blank reaches the upset of setting
Predeformation amount；
(7) make the rapid withdrawing of 4# retainer spinning roller；
(8) two forming spinning rollers is made to continue the mould pressing for completing inner rim position by the motion profile of setting.
In conclusion the 1# forming spinning roller in existing " three spinning rollers, three passage " technique is replaced with 4# retainer first by the present invention
Spinning roller.In spinning process, under the collective effect of retainer spinning roller and forming spinning roller, free end material is by certain extruding pier
Thick effect, makes free end material generate certain predeformation；Then wheel rim inner rim is completed under the action of two forming spinning rollers
The mould pressing at place.
Upset predeformation can not only effectively eliminate casting flaw, can also play the role of certain expanding, increasing to blank
Add deflection, keeps tissue more fine and close, reinforcing fiber streamline；The deformation heat that the big plastic deformation generated during upset generates
Deformed area is set to generate temperature-rise effect, certain temperature increases so that obtain certain temperature-compensating when at mould pressing inner rim,
Reduce material resistance of deformation.
In order to improve the mechanical performance at wheel rim inner rim position, the present invention by prior art core mould inner rim forming not
Closed wide-angle turns angled face structure and is improved to sunken arcs face, inclined-plane and upwarps arc surface, while upwarping the outer of arc surface
Side is levelling bench face, and wheel rim inner rim mould pressing region is made to form enclosed pyramidal slip face structure.Enclosed pyramidal slip face
Structure can be such that frictional flow resistance when mould pressing at inner rim reduces, while it is corresponding that the part material can be made to be formed when flowing
Three-dimensional compressive stress squeezes section, optimizes deformation uniformity, increases the total deformation of material at inner rim, promotes the machine at inner rim
Tool performance, moreover it is possible to which the amount of machining after reducing forming reaches the target for improving wheel drip molding inner rim position performance.
Claims (4)
1. three spinning rollers are arranged in a kind of aluminium alloy wheel hub spinning process, one of them is carries out preformed retainer spinning roller, in addition
Two are forming spinning roller, and retainer spinning roller and forming spinning roller cooperation make blank free end squeeze upset predeformation, then pass through forming
The mould pressing at spinning roller completion inner rim position, comprising the following steps:
(1) blank is clamped by upper mold and core model, rotates blank can with core model；
(2) two forming spinning rollers are arranged symmetrically about core model axial centre face, retainer spinning roller is arranged in two forming spinning rollers
On symmetrical centre face；
(3) the upset predeformation amount of blank is set；
(4) the feeding track, the initial amount of feeding and retainer spinning roller of three spinning rollers are set separately according to the upset predeformation amount of blank
Reach the residence time of initial amount of feeding position；
(5) rotate core model with blank；
(6) so that retainer spinning roller and two forming spinning rollers is rotated and feed the initial amount of feeding by setting time gap, make retainer
Feeding track of the spinning roller rapidly along its setting is fed to retainer position, and the time for stopping setting holds blank, keeps blank free
Flow to the upside of retainer spinning roller under the spinning squeezing action that end material shapes spinning roller at two forward, forming spinning roller continue into
It gives, until blank reaches the upset predeformation amount of setting；
(7) make the rapid withdrawing of retainer spinning roller；
(8) two forming spinning rollers is made to continue the mould pressing for completing inner rim part by the feeding track of setting.
2. aluminium alloy wheel hub spinning process as described in claim 1, it is characterised in that: the shape face at the retainer spinning roller retainer
Structure includes the intermediate incline between upper and lower arc surface and two arc surfaces.
3. a kind of core model suitable for technique described in claim 1, it is characterised in that: it corresponds to wheel rim inner rim shaping
Shape face structure includes the sunken arcs face successively postponed from top to bottom, inclined-plane and upwarps arc surface, and the outside for upwarping arc surface is
Levelling bench face makes wheel rim inner rim mould pressing region form enclosed pyramidal slip face structure.
4. core model as claimed in claim 3, it is characterised in that: the corresponding height in the levelling bench face is lower than on the inclined-plane
Hold corresponding height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137531.8A CN109702068B (en) | 2019-02-25 | 2019-02-25 | Aluminum alloy hub spinning process and mandrel applied to process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137531.8A CN109702068B (en) | 2019-02-25 | 2019-02-25 | Aluminum alloy hub spinning process and mandrel applied to process |
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| Publication Number | Publication Date |
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| CN109702068A true CN109702068A (en) | 2019-05-03 |
| CN109702068B CN109702068B (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910137531.8A Active CN109702068B (en) | 2019-02-25 | 2019-02-25 | Aluminum alloy hub spinning process and mandrel applied to process |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004306062A (en) * | 2003-04-04 | 2004-11-04 | Topy Ind Ltd | Method of machining vehicle wheel |
| US20080086886A1 (en) * | 2006-09-30 | 2008-04-17 | Shunkichi Kamiya | Cast aluminum wheel manufacturing and products |
| CN102078895A (en) * | 2010-11-11 | 2011-06-01 | 西北工业大学 | Method for forming large complex thin-wall shell with circumferential inner ribs |
| CN204035521U (en) * | 2014-08-27 | 2014-12-24 | 天津戴卡轮毂制造有限公司 | Low pressure casting spinning structure |
| CN107895057A (en) * | 2017-05-26 | 2018-04-10 | 宝沃汽车（中国）有限公司 | The numerical analysis method and system of rotary press modelling |
| CN109175053A (en) * | 2018-09-04 | 2019-01-11 | 安徽耀强精轮机械有限公司 | A kind of wheel hub folding and spinning forming technology |
| CN209647328U (en) * | 2019-02-25 | 2019-11-19 | 中南大学 | A kind of lower die of aluminium alloy wheel hub spinning mold |
-
2019
- 2019-02-25 CN CN201910137531.8A patent/CN109702068B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004306062A (en) * | 2003-04-04 | 2004-11-04 | Topy Ind Ltd | Method of machining vehicle wheel |
| US20080086886A1 (en) * | 2006-09-30 | 2008-04-17 | Shunkichi Kamiya | Cast aluminum wheel manufacturing and products |
| CN102078895A (en) * | 2010-11-11 | 2011-06-01 | 西北工业大学 | Method for forming large complex thin-wall shell with circumferential inner ribs |
| CN204035521U (en) * | 2014-08-27 | 2014-12-24 | 天津戴卡轮毂制造有限公司 | Low pressure casting spinning structure |
| CN107895057A (en) * | 2017-05-26 | 2018-04-10 | 宝沃汽车（中国）有限公司 | The numerical analysis method and system of rotary press modelling |
| CN109175053A (en) * | 2018-09-04 | 2019-01-11 | 安徽耀强精轮机械有限公司 | A kind of wheel hub folding and spinning forming technology |
| CN209647328U (en) * | 2019-02-25 | 2019-11-19 | 中南大学 | A kind of lower die of aluminium alloy wheel hub spinning mold |
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| CN109702068B (en) | 2023-07-14 |
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