CN101108406A - Material returning device of spin-forging machine - Google Patents
Material returning device of spin-forging machine Download PDFInfo
- Publication number
- CN101108406A CN101108406A CNA2007100497777A CN200710049777A CN101108406A CN 101108406 A CN101108406 A CN 101108406A CN A2007100497777 A CNA2007100497777 A CN A2007100497777A CN 200710049777 A CN200710049777 A CN 200710049777A CN 101108406 A CN101108406 A CN 101108406A
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- material returned
- retracting
- workpiece
- ring
- nut
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Abstract
The invention discloses a material-retracting device for a flow forming machine, which comprises a hydraulic device, a material-retracting board and a material-retracting ring. The material-retracting force provided by the hydraulic device acts on the material-retracting board, which transfers the material-retracting force to the material-retracting ring, which transfers the material-retracting force to a workpiece to finish the material retracting. The invention is characterized in that the invention also comprises a reset nut and a material retracting nut; the material-retracting nut and the material-retracting ring are connected by threads and are locked fixedly with a taper-end set screw; between the material-retracting ring and the work piece, a tapered-surface connection structure in small angle is employed; between the material-retracting board and the material-retracting nut, a tapered-surface connection structure is used. The tapered-surface connection structure can enlarge the contact area effectively, hence increase the friction force, improve the driving moment transmission during the backward spinning process and reduce the tangential slip between the workpiece, a mandrel and the spinning wheel during the spinning process, this improves obviously the surface quality and the dimensional accuracy of the product, and prolongs the service life of the fixtures.
Description
Technical field
The present invention relates to a kind of power spinning machine, relate in particular to a kind of discharging device of power spinning machine.
Background technology
Shear spinning technology is applicable to a kind of pressure processing method of shaping thin-walled hollow revolving parts, it is by spinning roller the workpiece of doing gyration with main shaft to be done feed motion, and pointwise is exerted pressure and made it produce continuous plastic deformation and become the processing method of required hollow revolving parts to workpiece.And shear spinning is by spinning roller direction of feed different dextrorotation, two kinds of spinning modes of derotation of being divided into the flow direction of fur material.In the shear spinning course of work, the final part of spinning is because influence of various factors such as rotary pressure process parameters, the mould phenomenon (work piece inner surface and core gap are too small) of embracing is arranged during workpiece, the discharging device of part is most important under this kind state, if material returned power can not overcome embrace mould power or act on the circumferential material returned power of part inhomogeneous as easy as rolling off a log cause can not discharging, part axial distortion, scratch the generation of phenomenons such as core.And under the derotation duty, workpiece head and material returned loop contacts, workpiece produces plastic deformation during the spinning roller contact workpiece, the workpiece deformation point is subjected to the three-dimensional stress state of radial compressive stress, circumferential tension, axial compression stress, and circumferentially tension produces the moment of torsion opposite with the workpiece direction of rotation, moment of torsion is passed on the material returned ring that contacts with workpiece along workpiece, there is moment of torsion in the contact-making surface of material returned ring and workpiece, therefore, the frictional force between workpiece and the unloading mechanism enough greatly just can make workpiece not produce tangential sliding phenomenon with core in spinning process.If the discharging device design is unreasonable, the generation that easily produces above-mentioned situation.
Tradition shear spinning equipment discharging device parts such as is grabbed by zigzag material returned ring, discharging and is formed, discharging grab install with the spinning roller frame on, material returned power is provided by spinning roller frame driving oil cylinder.Material returned ring has very high hardness through quenching, material returned ring is that multiple spot contacts with workpiece under the duty, can not provide and overcome the moment of torsion that produces by spinning roller and workpiece, thereby the friction of material returned ring and workpiece is converted to dynamic friction by static friction, workpiece is the easily tangential slippage between generation and mandrel, the spinning roller in spinning process, cause to produce serial defective in the part spinning process, cause the spinning part to be scrapped easily.On the other hand because material returned trepan tooth has higher hardness, in spinning process if having impurity to be bonded at that mandrel surface easily causes mandrel surface to produce scratching, cause part inner surface poor surface smoothness, core is reprocessed even scrap.Once more, the mould power of embracing that produces as workpiece and core is crossed conference and is caused discharging to be grabbed or material returned ring opening, causes discharging to be grabbed or material returned ring is scrapped and do not reached material returned purpose.
Summary of the invention
Purpose of the present invention is exactly that a kind of improved material returning device of spin-forging machine is provided in order to address the above problem, this discharging device can effectively improve the driving moment transmission in the derotation technical process, reduces workpiece in spinning process and the tangential slippage between the mandrel, spinning roller.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes hydraulic means, stripper and material returned ring, the material returned masterpiece that hydraulic means provides is used for stripper, and stripper passes to material returned ring with material returned power, and material returned ring passes to workpiece with material returned power again, finish material returned task, the present invention also comprises reduction nut and material returned nut; Adopt spiral marking connection between material returned nut and the material returned ring and hold out against screw locked, adopt low-angle conical surface connecting structure between material returned ring and the workpiece, employing conical surface connecting structure between stripper and the material returned nut with the awl end.
As a further improvement on the present invention, described hydraulic means is: side mounting material returned oil cylinder outside main spindle box, material returned oil cylinder is connected with stripper by hydraulic tube.
Described material returned oil cylinder is two, hangs on the both sides of main spindle box symmetrically.
Beneficial effect of the present invention is:
(1) adopts conical surface connecting structure between stripper and the material returned nut, adopt low-angle conical surface connecting structure between material returned ring and the workpiece, change the face contact into by traditional some contact, the frictional force of material returned ring and workpiece obviously increases, effectively improved the driving moment transmission in the derotation technical process, reduce workpiece in spinning process and the tangential slippage between the mandrel, spinning roller, remarkable to improving surface quality of products and prolonging the effect in service life of frock.
(2) adopt low-angle conical surface connecting structure between material returned ring and the workpiece, material returned ring inner conical surface provides the workpiece end radial constraint in spinning, the material returned process, has effectively improved the spinning dimensional accuracy of products.
(3) material returned power is provided by main spindle box outside material returned oil cylinder, and material returned power is big and put forth effort equilibrium, so can overcome frictional force between workpiece and the core (promptly embracing mould power).
Description of drawings
Fig. 1 is an axial sectional structure chart of the present invention;
Fig. 2 is the axial sectional structure chart of the present invention when user mode.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described in detail:
As shown in Figure 1, the present invention includes hydraulic means, reduction nut 1, stripper 2, material returned nut 3 and material returned ring 6, adopt spiral marking connection between material returned nut 3 and the material returned ring 6 and hold with awl that to hold out against screw 5 locked, adopt low-angle conical surface connecting structure between material returned ring 6 and the workpiece 9, adopt conical surface connecting structure between stripper 2 and the material returned nut 3.
Described hydraulic means is: side mounting material returned oil cylinder outside main spindle box, material returned oil cylinder is connected with stripper by hydraulic tube.This structure does not have embodiment in the drawings, all is to make according to a conventional method.
Described material returned oil cylinder is two, hangs on the both sides of main spindle box symmetrically.
As shown in Figure 2, the present invention in use, power spinning machine derotation processes workpiece 9, workpiece 9 is enclosed within the outside of mandrel 8, workpiece 9 is pressed direction of arrow rotation among the figure under the drive of main shaft, spinning roller 10 pushes workpiece 9 to mandrel 8 under hydraulic action, move axially by the direction of arrow among the figure simultaneously, at this moment the deformation point of workpiece 9 is subjected to radial compressive stress, circumferential tension, the pressure of these three directions of axial compression stress, wherein, circumferentially tension produces the moment of torsion opposite with the direction of rotation of workpiece 9, moment of torsion is passed on the material returned ring 6 that contacts with workpiece 9 along workpiece 9, there is moment of torsion in material returned ring 6 with the contact-making surface of workpiece 9, owing to adopt conical surface connecting structure between stripper 2 and the material returned nut 3, adopt low-angle conical surface connecting structure between material returned ring 6 and the workpiece 9, change the face contact into by traditional some contact, material returned ring 6 obviously increases with the frictional force of workpiece 9, so can overcome above-mentioned moment of torsion on the one hand, reduce workpiece in spinning process with mandrel, tangential slippage between the spinning roller, effectively improved the transmission of driving moment on the other hand, can overcome frictional force between workpiece and the core (promptly embracing mould power), improved surface quality of products, dimensional accuracy has prolonged the service life of frock.
Claims (3)
1. material returning device of spin-forging machine, comprise hydraulic means, stripper and material returned ring, the material returned masterpiece that hydraulic means provides is used for stripper, stripper passes to material returned ring with material returned power, material returned ring passes to workpiece with material returned power again, finish material returned task, it is characterized in that: also comprise reduction nut and material returned nut; Adopt spiral marking connection between material returned nut and the material returned ring and hold out against screw locked, adopt low-angle conical surface connecting structure between material returned ring and the workpiece, employing conical surface connecting structure between stripper and the material returned nut with the awl end.
2. material returning device of spin-forging machine according to claim 1 is characterized in that: described hydraulic means is: side mounting material returned oil cylinder outside main spindle box, material returned oil cylinder is connected with stripper by hydraulic tube.
3. material returning device of spin-forging machine according to claim 1 is characterized in that: described material returned oil cylinder is two, hangs on the both sides of main spindle box symmetrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100497777A CN101108406A (en) | 2007-08-17 | 2007-08-17 | Material returning device of spin-forging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100497777A CN101108406A (en) | 2007-08-17 | 2007-08-17 | Material returning device of spin-forging machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101108406A true CN101108406A (en) | 2008-01-23 |
Family
ID=39040779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100497777A Pending CN101108406A (en) | 2007-08-17 | 2007-08-17 | Material returning device of spin-forging machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101108406A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972821A (en) * | 2010-11-03 | 2011-02-16 | 中信戴卡轮毂制造股份有限公司 | Aluminium wheel spinning mould ejector |
| CN101658887B (en) * | 2008-08-25 | 2011-07-20 | 西安航天动力机械厂 | Discharge ring for spinning machine |
| CN102266888A (en) * | 2011-07-24 | 2011-12-07 | 哈尔滨工程大学 | Ball spinning forming fixture device and reverse ball spinning forming method thereof |
| CN104550394A (en) * | 2014-12-30 | 2015-04-29 | 北京有色金属研究总院 | Powerful spinning withdrawing device |
| CN107737828A (en) * | 2017-10-16 | 2018-02-27 | 航天材料及工艺研究所 | A kind of fast quick-mounting/demoulding tooling of the high magnesium-rare earth cylindrical member of large scale and dress/release method |
| CN113118285A (en) * | 2021-04-08 | 2021-07-16 | 内蒙古航天红岗机械有限公司 | Engine housing derotation blank positioning tool |
-
2007
- 2007-08-17 CN CNA2007100497777A patent/CN101108406A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101658887B (en) * | 2008-08-25 | 2011-07-20 | 西安航天动力机械厂 | Discharge ring for spinning machine |
| CN101972821A (en) * | 2010-11-03 | 2011-02-16 | 中信戴卡轮毂制造股份有限公司 | Aluminium wheel spinning mould ejector |
| CN102266888A (en) * | 2011-07-24 | 2011-12-07 | 哈尔滨工程大学 | Ball spinning forming fixture device and reverse ball spinning forming method thereof |
| CN104550394A (en) * | 2014-12-30 | 2015-04-29 | 北京有色金属研究总院 | Powerful spinning withdrawing device |
| CN104550394B (en) * | 2014-12-30 | 2016-07-06 | 北京有色金属研究总院 | A kind of shear spinning discharging device |
| CN107737828A (en) * | 2017-10-16 | 2018-02-27 | 航天材料及工艺研究所 | A kind of fast quick-mounting/demoulding tooling of the high magnesium-rare earth cylindrical member of large scale and dress/release method |
| CN113118285A (en) * | 2021-04-08 | 2021-07-16 | 内蒙古航天红岗机械有限公司 | Engine housing derotation blank positioning tool |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |