CN202427951U - Semisolid metal powder forming device for double-action pressing - Google Patents
Semisolid metal powder forming device for double-action pressing Download PDFInfo
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- CN202427951U CN202427951U CN2012200180689U CN201220018068U CN202427951U CN 202427951 U CN202427951 U CN 202427951U CN 2012200180689 U CN2012200180689 U CN 2012200180689U CN 201220018068 U CN201220018068 U CN 201220018068U CN 202427951 U CN202427951 U CN 202427951U
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- 239000000843 powder Substances 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 title claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 17
- 238000003825 pressing Methods 0.000 title abstract 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000011324 bead Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 22
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 9
- 238000007493 shaping process Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000010099 solid forming Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000002305 electric material Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
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Abstract
The utility model discloses a semisolid metal powder forming device for double-action pressing. A covering plate is arranged on a tank body; a gear driving mechanism is arranged on a base plate in the tank body; a gear is connected with a support plate on the covering plate through racks; two double-sided inner side racks penetrate through a central hole of the covering plate and then are connected with a lower punch side groove; the upper ends of push rods are embedded into cushion block holes; the lower ends of the push rods are fixedly connected; the lower ends of two lower pull rods penetrate through the covering plate and then are respectively fixed at two ends of a push plate; the upper ends of the two lower pull rods are respectively embedded into respective upper pull rod holes to form sliding fit; a female die is sleeved at the outer side of a lower punch and is fixed in a covering plate groove; and a heating furnace is sleeved at the outer side of the female die and is fixed on the covering plate. According to the semisolid metal powder forming device disclosed by the utility model, a powder forming technology and a semisolid forming technology are combined, so that the near net shaping is realized, subsequent treatment processes are reduced and the manufacturing cost is reduced. The semisolid metal powder forming device has the functions of double-action pressing forming and automatic demoulding; and the uniformity of density distribution of a pressed compact is improved and the performances of parts and the production efficiency are improved.
Description
Technical field
The utility model relates to a kind of powder forming device, especially relates to a kind of semi-solid-state metal powder forming device that is used for two-way compacting.
Background technology
Powder metallurgy is as raw material, through the technical process of goods such as shaping and sintering manufacturing metal material, composite and functional material with metal dust (the perhaps mixture of metal dust and non-metal powder).The product range of application that powder metallurgic method is made is very extensive, from the standard machinery to the precision instrument, from the hardware & tools to the big machinery; From electronics industry to the motor manufacturing; From the civilian industry to the war industry, from the general technology to the sophisticated technology, all can see the figure of powder forming technology.The powder metallurgical technique process mainly comprises processes such as dress powder, compacting, sintering and post processing; Its characteristics mainly contain: can produce the material with property that can't produce with common smelting process, like magnetic material, electric material, superconductor, thermoelectric material, hydrogen storage material and catalyst material etc.; Performance of products is generally superior than common smelting process; Can realize near-net-shape and automatic batch production, practice thrift metal material, thereby reduce resource and the cost of producing effectively.But traditional powder forming also has weak point, for example needs compacting earlier in this technical process, and then sintering, and this will increase operation and corresponding working time, and pressed compact possibly damaged in handling process, finally influences the quality of formation of parts.
Semi-solid state forming technique is a kind of technical process between casting and forging of rising in recent years, is to be directed against the semi-molten of solid, liquid attitude coexistence or the general name of the process that semi-solid metal forms processing.Shortcomings such as splash when the semi-solid metal forming technology can be avoided liquid casting forming, turbulent flow and volume gas are forged with solid simultaneously and are compared, and are easier to form fine characteristic, and deformation force is little, is beneficial to the saving energy.Therefore; Compare with traditional forming technology; Semi-Solid Metals Forming has a series of outstanding advantages: forming temperature is low; The drip molding mechanical property is good, combines the advantage of solid metallic die forging and liquid casting forming preferably, can produce complex-shaped, high-performance and high-precision miniature parts in batches.
The semisolid powder forming can be thought a kind of new manufacture that the prior powder metallurgy method is combined with semi-solid-state shaping, compares with the prior powder metallurgy method, and the semisolid powder forming can obviously reduce subsequent treatment process, reduces manufacturing cost; Energy-conservation, simplify technology, improve the advantage that has more on the microstructure, and can carry out careful control, thereby in the manufacturing of nano composite structure and function gradient structure, have great potential material properties.At present, the research about powder forming device and semisolid state forming device both at home and abroad has much, and still, the device of relevant semisolid powder forming but rarely has report.
Summary of the invention
The purpose of the utility model is to provide a kind of semi-solid-state metal powder forming device that is used for two-way compacting; This device combines powder forming and semi-solid state forming technique, has can realize near-net-shape, reduce subsequent treatment process and reduce manufacture cost and other advantages; This device has two-way press forming and automatic demoulding functions, can improve uniformity, the performance that improves institute's manufactured parts and shortening production time that green density distributes.
The technical scheme that the utility model adopts is:
On the casing of the utility model overlay is installed; Base plate both sides in the casing; Two pack supports are housed respectively; The two ends of first, second outboard shafts are bearing in respectively separately in one group the bracket bearing hole; On first, second outboard shafts respectively symmetry first outside gear wheel, the first inboard pinion, the second inboard pinion and second outside gear wheel are housed, the first inboard pinion on first, second outboard shafts, the base plate both sides in the casing between the second inboard pinion are equipped with other two pack supports respectively; The two ends of first, second inner shafts are bearing in respectively in the other separately one group bracket bearing hole, and the 3rd inboard pinion and the 4th inboard pinion are housed respectively on first, second inner shafts; First, second outside gear wheel of symmetry on first, second outboard shafts is meshed through two-sided outboard rack separately; The first inboard pinion, the second inboard pinion of symmetry are meshed with the 3rd inboard pinion and the 4th inboard pinion on first inner shafts on first outboard shafts; The first inboard pinion of the symmetry on second outboard shafts, the second inboard pinion are meshed with the 3rd inboard pinion and the 4th inboard pinion on second inner shafts, and the 3rd inboard pinion on first, second inner shafts and the 4th inboard pinion are meshed with separately two-sided inboard tooth bar respectively; After two two-sided inboard tooth bars passed the overlay centre bore, its upper end was connected with the bottom punch lateral groove, and the push rod upper end embeds in the cushion block hole; Again push rod is passed the centre bore of bottom punch from top to bottom; Two inboard tooth bars are passed in push pedal, and are fixedly connected with the lower end of push rod, after overlay is passed in the lower end of two lower links; Be separately fixed at the push pedal two ends; The upper end of two lower links embeds respectively to form in the upper connecting rod hole separately and is slidingly matched, and two two-sided outboard rack are passed overlay respectively, and its upper end is fixedly connected with the lower end of connecting rod separately respectively; Former is enclosed within the outside of bottom punch, and is fixed in the overlay groove, heating furnace is enclosed within the outside of former, and is fixed on the overlay; The upper end of two connecting rods and two upper connecting rods is installed in respectively above the gripper shoe, and upper punch passes gripper shoe, and its circular bead surface is fixedly connected with gripper shoe.
Described two outboard gears and two inboard gears are the diagonal-cut rack engagement with separately two-sided tooth bar.
Described inside heating furnace is provided with thermocouple and is evenly equipped with many heating handfuls.
The beneficial effect that the utlity model has is:
1) powder forming and semi-solid state forming technique are combined, have and to realize near-net-shape, reduce subsequent treatment process and reduce manufacture cost and other advantages;
2) this device has two-way press forming and automatic demoulding functions, can improve uniformity, the performance that improves institute's manufactured parts and shortening production time that green density distributes.
Description of drawings
Fig. 1 is the overall assembly structure schematic diagram of the utility model.
Fig. 2 is the mounted inside structure principle chart of the utility model.
Fig. 3 is the former appearance assumption diagram.
Fig. 4 is the cushion block structure chart.
Fig. 5 is a former mounted inside structure chart.
Fig. 6 is the upper connecting rod structure chart.
Fig. 7 is the lower link structure chart.
Fig. 8 is the formation system sketch map of the utility model.
Among the figure: 1. upper punch, 2. gripper shoe, 3. upper connecting rod, 4. lower link, 5. connecting rod, 6. overlay, 7. casing; 8. heating furnace, 9. thermocouple, 10. heating rod, 11. formers, 12. cushion blocks, 13. bottom punches, 14. push rods; 15. push pedal, 16. supports, 17. bearings, 18. outside gear wheels, 19. inboard pinions, 20. inboard tooth bars, 21. outboard rack; 22. outboard shafts, 23. inner shafts, 24. forcing presses, 25. entablatures, 26. controllers, 27. displays.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Like Fig. 1, shown in Figure 2; Overlay 6 is installed on the casing 7; Base plate both sides in the casing 7; Two pack supports 16 are housed respectively; The two ends of first outboard shafts 22 and second outboard shafts 22 are bearing in respectively separately in one group the hole of bracket bearing 17; On first outboard shafts 22 and second outboard shafts 22 respectively symmetry first outside gear wheel, 18, first inboard pinion 19, the second inboard pinion 19 and second outside gear wheel 18 is housed, the base plate both sides in the casing 7 between first inboard pinion 19, the second inboard pinion 19 on first, second outboard shafts 22 are equipped with other two pack supports 16 respectively; The two ends of first inner shafts 23 and second inner shafts 23 are bearing in respectively in the hole of other separately one group bracket bearing 17, and the 3rd inboard pinion 19 and the 4th inboard pinion 19 are housed respectively on first inner shafts 23 and second inner shafts 23; First outside gear wheel 18 of the symmetry on first outboard shafts 22 and second outboard shafts 22 and second outside gear wheel 18 are meshed through two-sided outboard rack 21 separately; On first outboard shafts 22 on first inboard pinion 19, the second inboard pinion 19 and first inner shafts of symmetry 23 the 3rd inboard pinion 19 and the 4th inboard pinion 19 be meshed; First inboard pinion 19, the second inboard pinion 19 of the symmetry on second outboard shafts 22 is meshed with the 3rd inboard pinion 19 and the 4th inboard pinion 19 on second inner shafts 23, and the 3rd inboard pinion 19 on first, second inner shafts 23 and the 4th inboard pinion 19 are meshed with separately two-sided inboard tooth bar 20 respectively; Like Fig. 2, shown in Figure 5, after two two-sided inboard tooth bars 20 passed the centre bore of overlay 6, its upper end was connected with bottom punch 13 lateral grooves; Cushion block 12 as shown in Figure 4, its lower end is processed with stepped hole, and the upper end of push rod 14 embeds in the stepped hole of cushion block 12; Make push rod 14 can drive cushion block 12 and move together that push rod 14 is passed the centre bore of bottom punch 13 from top to bottom, two inboard tooth bars 20 are passed in push pedal 15 again; And be fixedly connected with the lower end of push rod 14, as shown in Figure 6, upper connecting rod 3 inside are step-like through hole; There is external screw thread its upper end, and as shown in Figure 7, lower link 4 is the multidiameter shape; After overlay 6 is passed in the lower end of two lower links 4, be separately fixed at the two ends of push pedal 15, the upper end of two lower links 4 embeds respectively to form in the hole of upper connecting rod as shown in Figure 63 separately and is slidingly matched; Two two-sided outboard rack 21 are passed overlay 6 respectively, and its upper end is fixedly connected with the lower end of connecting rod 5 separately respectively; As shown in Figure 3, former 11 outsides are the multidiameter shape, are evenly equipped with through hole on its shoulder; Former 11 machined have through hole, and former 11 is enclosed within the outside of bottom punch 13, and are fixed in the groove of overlay 6; Heating furnace 8 is enclosed within the outside of former 11, and is fixed on the overlay 6; The upper end of two connecting rods 5 and two upper connecting rods 3 is installed in respectively above the gripper shoe 2, and upper punch 1 passes gripper shoe 2, and its circular bead surface is fixedly connected with gripper shoe 2.
Described two outboard gears 18 and two inboard gears 19 are the diagonal-cut rack engagement with separately two-sided outboard rack 21 with two-sided inboard tooth bar 20.
Described heating furnace 8 inside are provided with thermocouple 8 and are evenly equipped with many heating handfuls 10, and heating furnace 8 can be chosen on market.
The practical implementation process of this device is following:
As shown in Figure 1; With several screws eight measure-alike supports 16 are installed on the base plate in casing 7; Per two supports 16 are symmetrical distribution, and the middle part of two pairs of supports 16 near casing 7 arranged, and other two pairs of supports 16 are away from the middle part of casing 7; The installation of will staggering of every pair of support 16 is not on same straight line; A measure-alike bearing 17 is installed in the hole of each support 16; Identical inboard gear of number 19 and outboard gears 18 are installed on each root outboard shafts 22 from inside to outside successively, and the installation site of inboard gear 19 and outboard gears 18 is symmetry respectively, and this outboard shafts 22 is packed in the endoporus of two support 16 upper bearing (metal)s 17 of symmetry; Pair of inside gear 19 is installed on each root inner shafts 23; In the endoporus of packing this inner shafts 23 into two support 16 upper bearing (metal)s 17 symmetrical; It is circumferentially fixing all to adopt key to carry out between each gear and the axle; Carry out axial restraint with sleeve between the adjacent gear, all gears all adopt the manufacturing of mechanical performance excellent material with parts such as axles.
Like Fig. 2 and shown in Figure 5; Pair of inside tooth bar 20 is installed in respectively in the groove of bottom punch 13 bottoms, adopts screw bolt and nut to connect, push rod 14 embeds the inside of cushion block 12 as shown in Figure 4; Again push rod 14 is passed the interior bone of bottom punch 13 from top to bottom; Inboard tooth bar 20 is passed in push pedal 15 from the bottom to top, and be fixedly connected with nut, the inboard tooth bar 20 in this structure is meshed with inboard gear 19 respectively with the lower end of push rod 14; The lower end of pair of outside tooth bar 21 is meshed with corresponding outboard gears 18 respectively, and the upper end of each root outboard rack 21 is passed overlay 6 successively, and is connected with connecting rod 5 respectively; The lower end of every lower link 4 as shown in Figure 7 is passed the endoporus and the overlay 6 of every upper connecting rod 3 as shown in Figure 6 successively, and install and fix with push pedal 15 usefulness nuts respectively.
As shown in Figure 1; With screw overlay 6 and casing 7 are installed; It is inner that former as shown in Figure 3 11 adopts screws to be fixed on overlay 6 corresponding groove, and former 11 and all inner parts thereof all adopt the made with performance such as high temperature resistant, wear-resistant.
As shown in Figure 1, heating furnace 8 is enclosed within the outside of former 11, and is fixed on the overlay, place a thermocouple 9 and three heating rods 10 respectively in inside heating furnace; The upper end of every connecting rod 5 and upper connecting rod 3 is installed in respectively above the gripper shoe 2, upper punch 1 pass gripper shoe 2 and with its fixed installation.
As shown in Figure 8, whole building mortion is installed in above the forcing press 24, the upper punch 1 of building mortion is connected with the entablature 25 of forcing press 24; Before the work, controller 26 is regulated entablature 25, drives upper punch 1 and is positioned at rational position; Earlier in former 11, be coated with corresponding lubricant, a certain amount of powder be layered in the hole of former 11, close the door of heating furnace 8; Give heating rod 10 energisings, control heating furnace 8 installation procedures heat up, and the thermocouple 9 in the heating furnace 8 can be measured temperature in the stove in real time; And on display 27, show, when temperature in the stove finally reaches in the semi-solid temperature interval of dusty material, be incubated; At this moment; Sill 25 moves down; Drive upper punch 1 and get in the former 11, and connecting rod 5 promotes outboard rack 21 and move downward, drive bottom punches 13 through the drive mechanisms in the casing 7 and move upward; The final cushion block 12 that promotes moves upward, and the dusty material of upper punch 1 and 12 pairs of semi-solid state of cushion block carries out press forming; Control heating furnace 8 interior temperature then and slowly reduce,, open fire door until room temperature; Controller 26 control entablatures 25 returns, it is up to drive upper punch 1, and gripper shoe 2 is up through upper connecting rod 3 drive lower links 4 simultaneously; Push pedal 15 drives push rod 14 and moves upward, and last push rod 14 promotes the cushion block motion, and the part that is shaped is released former 11; Take out part; Accomplish knockout course, last building mortion is provided with playback according to program, prepares to be shaped processing next time; In whole forming process, some measured physical quantitys can show on display 27 and preserve.
Claims (3)
1. semi-solid-state metal powder forming device that is used for two-way compacting; It is characterized in that: casing (7) is gone up overlay (6) is installed; Base plate both sides in the casing (7); Two pack supports are housed respectively, and the two ends of first, second outboard shafts are bearing in respectively separately in one group the bracket bearing hole, on first, second outboard shafts respectively symmetry first outside gear wheel, the first inboard pinion, the second inboard pinion and second outside gear wheel are housed; The first inboard pinion on first, second outboard shafts, the base plate both sides in the casing (7) between the second inboard pinion; Other two pack supports (16) are housed respectively, and the two ends of first, second inner shafts are bearing in respectively in the other separately one group bracket bearing hole, and the 3rd inboard pinion and the 4th inboard pinion are housed respectively on first, second inner shafts; First, second outside gear wheel of symmetry on first, second outboard shafts is meshed through two-sided outboard rack separately; The first inboard pinion, the second inboard pinion of symmetry are meshed with the 3rd inboard pinion and the 4th inboard pinion on first inner shafts on first outboard shafts; The first inboard pinion of the symmetry on second outboard shafts, the second inboard pinion are meshed with the 3rd inboard pinion and the 4th inboard pinion on second inner shafts, and the 3rd inboard pinion on first, second inner shafts and the 4th inboard pinion are meshed with separately two-sided inboard tooth bar respectively; After two two-sided inboard tooth bars passed overlay (6) centre bore, its upper end was connected with bottom punch (13) lateral groove, and push rod (14) upper end embeds in cushion block (12) hole; Again push rod (14) is passed the centre bore of bottom punch (13) from top to bottom; Two inboard tooth bars are passed in push pedal (15), and are fixedly connected with the lower end of push rod (14), after overlay (6) is passed in the lower end of two lower links (4); Be separately fixed at the push pedal two ends; The upper end of two lower links (4) embeds respectively to form in upper connecting rod (3) hole separately and is slidingly matched, and two two-sided outboard rack are passed overlay respectively, and its upper end is fixedly connected with the lower end of connecting rod separately respectively; Former (11) is enclosed within the outside of bottom punch, and is fixed in overlay (6) groove, and heating furnace (8) is enclosed within the outside of former (11), and is fixed on the overlay (6); The upper end of two connecting rods and two upper connecting rods (3) is installed in respectively above the gripper shoe (2), and upper punch (1) passes gripper shoe (2), and its circular bead surface is fixedly connected with gripper shoe (2).
2. a kind of semi-solid-state metal powder forming device that is used for two-way compacting according to claim 1 is characterized in that: described two outboard gears and two inboard gears are the diagonal-cut rack engagement with separately two-sided tooth bar.
3. a kind of semi-solid-state metal powder forming device that is used for two-way compacting according to claim 1 is characterized in that: described heating furnace (8) inside is provided with thermocouple and is evenly equipped with many heating handfuls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200180689U CN202427951U (en) | 2012-01-16 | 2012-01-16 | Semisolid metal powder forming device for double-action pressing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200180689U CN202427951U (en) | 2012-01-16 | 2012-01-16 | Semisolid metal powder forming device for double-action pressing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202427951U true CN202427951U (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200180689U Expired - Lifetime CN202427951U (en) | 2012-01-16 | 2012-01-16 | Semisolid metal powder forming device for double-action pressing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202427951U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528031A (en) * | 2012-01-16 | 2012-07-04 | 浙江大学 | Semisolid metal powder forming device for double-action pressing |
| CN103962554A (en) * | 2014-05-07 | 2014-08-06 | 赵咪咪 | Powder processing convex block setting machine disk |
| TWI665035B (en) * | 2013-10-09 | 2019-07-11 | 國立大學法人東北大學 | Semi-solidified casting and forging device and method, and casting and forging products |
| CN112453404A (en) * | 2020-11-06 | 2021-03-09 | 燕山大学 | Finish rolling system for semi-solid metal powder blooming strip |
-
2012
- 2012-01-16 CN CN2012200180689U patent/CN202427951U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528031A (en) * | 2012-01-16 | 2012-07-04 | 浙江大学 | Semisolid metal powder forming device for double-action pressing |
| CN102528031B (en) * | 2012-01-16 | 2013-10-23 | 浙江大学 | Semisolid metal powder forming device for double-action pressing |
| TWI665035B (en) * | 2013-10-09 | 2019-07-11 | 國立大學法人東北大學 | Semi-solidified casting and forging device and method, and casting and forging products |
| CN103962554A (en) * | 2014-05-07 | 2014-08-06 | 赵咪咪 | Powder processing convex block setting machine disk |
| CN103962554B (en) * | 2014-05-07 | 2016-01-27 | 谢娟 | A kind of powder processing projection forming machine dish |
| CN112453404A (en) * | 2020-11-06 | 2021-03-09 | 燕山大学 | Finish rolling system for semi-solid metal powder blooming strip |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120912 Effective date of abandoning: 20131023 |
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| RGAV | Abandon patent right to avoid regrant |