CN201519765U - Powder metallurgy high-speed pressing press based on mechanical spring energy storage - Google Patents
Powder metallurgy high-speed pressing press based on mechanical spring energy storage Download PDFInfo
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- CN201519765U CN201519765U CN2009202382289U CN200920238228U CN201519765U CN 201519765 U CN201519765 U CN 201519765U CN 2009202382289 U CN2009202382289 U CN 2009202382289U CN 200920238228 U CN200920238228 U CN 200920238228U CN 201519765 U CN201519765 U CN 201519765U
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Abstract
The utility model discloses a powder metallurgy high-speed pressing press based on mechanical spring energy storage. The press comprises a frame, a heavy hammer lifting mechanism, a heavy hammer impacting mechanism, a hammer handle locking and releasing mechanism, a mechanical spring, a suspension part, a spring sleeve, a fastener, an upper die-punching support platform and a power mechanism; the heavy hammer lifting mechanism, the hammer handle locking and releasing mechanism, the heavy hammer impacting mechanism and the upper die-punching support platform sliding linearly are sequentially connected on a guide rod in series; in the direction vertical to the guide rod, two ends of a shaft pin-type sensor pass through and are clamped in the through hole of the frame of the lifting part, and the middle part of the shaft pin-type sensor passes through and is clamped in the lug through hole. The powder metallurgy high-speed press is applicable to producing the power metallurgy high-speed pressing parts with small volume, has small volume, light weight, simple structure, simple and convenient assembly, reliable performance, overcomes the problems that the existing hydraulic high-speed pressing equipment has complex structure and expensive manufacturing cost, and is easy to be popularized and applied to the powder metallurgy industries.
Description
Technical field
The utility model relates to a kind of powder metallurgy high velocity compacted equipment, specifically is meant a kind of press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy.
Background technology
Powder metallurgy high velocity compacted technology (high velocity compaction is called for short HVC) is a Sweden metallurgical powder manufacturer
AB and the equipment Hydropulsor AB of manufacturer are in a kind of powder metallurgy new technology and the new technology of calendar year 2001 joint research exploitation.Be exactly to utilize the weight high speed impact to produce powerful shock wave energy in 0.02s, will be undertaken densified specifically by the metal dust that pressing mold passes in the mould, the additional one by one shock wave of 0.3s can improve constantly density at interval, thereby make material property excellent more, with traditional powder compaction technology (temperature and pressure for example, Deng static pressure) compare, this technology is particularly suitable for suppressing the powdered metal parts of separate unit terrace, formed product is given birth to embryo density, mechanical performance such as tensile strength and yield strength is improved significantly, and produce more economically and change, possess the ability of the device fabrication super large part littler than the tradition compacting.
The whole world has only Sweden Hydropulsor AB company and cooperative venture (for example domestic Nanjing Xidun Dongbu Precise Machines Co., Ltd.) thereof to be used for the equipment of powder metallurgy high velocity compacted in production at present.Calendar year 2001, the said firm produced the hydraulic shock machine of original creation, had solved the plant issue that limits HVC skilled industry application for a long time, and this technology is popularized in an all-round way.At present, the said firm has successfully developed four generation HVC press, be HYP3522 (100 * 103kg), HYP3527 (350 * 103kg), HYP35218 (900 * 103kg) and HYP35240 (2000 * 103kg) swaging machines, wherein the HYP3522 swaging machine manufactures and designs for laboratory specially.The new range press can not only be finished the high velocity compacted technical process, also integrated finishing process on same set of equipment.
The said equipment that swedish company is made; adopt unique hydraulic shock structure; and employing hyperpressure hydraulic oil; be equipped with and improve and high-grade hydraulic pressure and pneumatic system; high-volume hydraulic valve control system wherein; the protection that all patented of devices such as hydraulic hammer locking and technology; but because hydraulic shock system requirements harshness causes the pipeline complexity; parts are numerous to cause bulky complex structure; each parts machining accuracy and installation accuracy are all had relatively high expectations and are caused complete machine to involve great expense, and make it be difficult to extensively be promoted in the powder metallurgy industry at home.
Summary of the invention
The purpose of this utility model is to overcome existing hydraulic High-speed press device technical sophistication and costliness, and the problem of extensively promoting in the difficult powder metallurgy industry at home provides a kind of powder metallurgy high-speed blanking press based on the mechanical spring accumulation of energy.
The purpose of this utility model is to be achieved through the following technical solutions:
A kind of press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy comprises that fuselage ring, weight hoisting mechanism, tension weight churning mechanism, hammer handle locking relieving mechanism, mechanical spring and suspender, spring spool and securing member thereof, upper punch saddle and actuating unit form; Weight hoisting mechanism, hammer handle locking relieving mechanism, tension weight churning mechanism and upper punch saddle along linear slide are connected on the guide rod successively; On perpendicular to the guide rod direction, axial pin type sensor passes the through hole of the hangers of through hole that is embedded with sensor sleeve that the lifting member framework central authorities of weight hoisting mechanism offer and hammer handle locking relieving mechanism, and through hole, the axial pin type sensor middle part that the two ends of axial pin type sensor snap in the sensor sleeve of lifting member framework snapped in the hangers through hole; One end of mechanical spring hangs upside down and is fixed in the upper beam of fuselage ring by the spring suspender, the mechanical spring stage casing is installed with spring spool, spring spool is fixed on the weight hoisting mechanism by the spring spool securing member, and the other end of mechanical spring freely contacts with the awl tube of tension weight churning mechanism.
Described weight hoisting mechanism is that the power original paper of spring spool and spring spool securing member, symmetric arrangement and the direction of motion and guide rod shaft line parallel is formed by the sensor sleeve in lifting member framework that has through hole and the embedding through hole thereof; Their connecting relation is as follows: spring spool is fixed on the hoisting frame framework by the spring spool securing member, and the power original paper is connected with lifting member framework two ends.
Described power original paper is selected hydraulic piston cylinder for use.
The paired clamp that described hammer handle locking relieving mechanism is driven by the bar group, locking release member framework, hangers are formed; Their connecting relation is as follows: the clamp that connects with the bar group by pin is fixed in the locking release member framework, and hangers is fixed on locking release member frame roof.
Described tension weight churning mechanism by the impulse member framework, impact tup, the awl tube is formed; Their connecting relation is as follows: impact tup and pass impulse member framework center through hole and fixing, the awl tube is fixed in the upper surface of impulse member framework.
Described upper punch saddle is made up of upper punch saddle spare framework, upper punch sleeve; Their connecting relation is as follows: the upper punch sleeve passes upper punch saddle spare framework center through hole and fixing.
Described lifting member framework, locking release member framework, impulse member framework and upper punch saddle spare framework all are being equipped with guide pin bushing by the guide rod place of passing.
Described fuselage ring is made up of pedestal, upper beam, column, guide rod, ditch screw, clamp nut, and their connecting relation is as follows: an end of column and guide rod is separately fixed on the pedestal, and the other end is fastened on upper beam after passing the through hole of upper beam respectively.
Described fuselage ring is vertical or horizontal.
Above-mentioned press for high-speed pressing of powder metallurgy be with pneumatic, hydraulic pressure or the savings of other actuating unit energy in mechanical spring, to compress the mechanical potential abrupt release of spring by a hammer handle locking relieving mechanism, drive to impact tup and reach above high-speed of 10m/s, reach of the requirement of HVC technology in the tension weight churning speed of compacting during moment, and shock wave passed to metal powder granulates by upper punch, make it the utmost point fine and close shaping in the short time.
The utility model compared with prior art has following outstanding advantage:
1, the utility model provides a kind of powder metallurgy high-speed blanking press based on the mechanical spring accumulation of energy, be applicable to and produce the less powder metallurgy high velocity compacted part of volume, volume is little, in light weight, simple in structure, simple and convenient assembly, and dependable performance has overcome the baroque problem of existing hydraulic High-speed press device.
2, the utility model complete machine amount of parts is few, uses the power source of national standard mechanical spring as driving weight again, and the standard spring is cheap, has further cut down cost; Each parts is made in addition and assembly precision is less demanding, and manufacturing cost also can further reduce.Compare with the hydraulic shock machine that uses the complicated hydraulic loop and to be lowered into the complete equipment cost effectively, manufacturing cost only is 1/10th of existing hydraulic High-speed press device.Overcome the problem of existing hydraulic High-speed press device costliness.
3, the utility model can be adjusted the length of spring according to the volume size of processing parts and the needs of impact energy, even replaces the spring of different size, in the protection mould, has also enlarged the range of application of this forcing press.
4, the utility model unclamps at the clamp of locking relieving mechanism and discharges jump bit end to end after the portion, and whole tension weight churning mechanism can free move downward the bump upper punch along guide rod without any being rigidly connected.The slow problem of impact velocity that the advantage of this design has been to avoid common hoisting mechanism and beater mechanism integrated design to cause has also reduced the requirement to complete machine rigidity and intensity.
5, the clamped end of hammer handle of the present utility model locking relieving mechanism and jump bit end to end the stressed place of portion's groove be that face contacts, contact locking mode compares and improves lifting surface area greatly with many steel balls multiple spot that other retaining mechanisms adopt, avoided stress surface to concentrate the plastic deformation that causes, improved impact tup and locking relieving mechanism service life because of the long-term contact point stress that uses.
6, advantage in sum, this press for high-speed pressing will be easy to wide popularization and application in the powder metallurgy industry.
Description of drawings
Fig. 1 is a kind of overall structure schematic diagram of the press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy;
Fig. 2 is a kind of core component assembling schematic diagram of the press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy;
Fig. 3 is a kind of axial pin type sensor scheme of installation of the press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy;
Fig. 4 is a kind of working state schematic representation of the press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy.
1 upper beam, 2 lifting member frameworks, 3 locking release member frameworks, 4 columns, 5 mechanical springs, 6 impulse member frameworks, 7 guide rods, 8 pedestals, 9 anchoring bolts, 10 clamp nuts, 11 spring spools, 12 axial pin type sensors, 13 spring spool securing members, 14 impact tup, 15 hydraulic piston cylinders, 16 upper punch, 17 upper punch saddle spare frameworks, 18 moulds, 19 hangers, 20 clamps, 21 awl tubes, 22 upper punch sleeves, 23 spring suspenders, 24 sensor sleeve among the figure.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, Fig. 1～Figure 3 shows that concrete enforcement structure of the present utility model, but the utility model embodiment is not limited only to this.
Shown in Fig. 1,2,3, present embodiment is the metallurgical press for high-speed pressing of vertical powder, comprises that fuselage ring, weight hoisting mechanism, tension weight churning mechanism, hammer handle locking relieving mechanism, mechanical spring 5 and suspender, spring spool 11 and securing member 13 thereof, upper punch saddle and actuating unit hydraulic piston cylinder 15 form.Wherein, the fuselage ring of press for high-speed pressing of powder metallurgy is made up of pedestal 8, upper beam 1, column 4, guide rod 7, ditch screw 9, clamp nut 10, their connecting relation is as follows: column 4 and guide rod 7 all have step surface and screw thread at two ends, one end is fixed on the pedestal 8, the other end pass put the beams in place 1 through hole and by clamp nut 10 by being threaded.
The weight hoisting mechanism is by the lifting member framework 2 that has through hole and embed four spring spools 11 of sensor sleeve 24 in the through hole, symmetric arrangement and hydraulic piston cylinder 15 that spring spool securing member 13, symmetry and direction of motion axis are arranged in parallel is formed; Their connecting relation is as follows: spring spool 11 is fixed on the hoisting frame framework 2 by spring spool securing member 13, and the two ends of the piston rod of symmetric arrangement hydraulic piston cylinder 15 and lifting member framework 2 are fixed by screw thread; Described lifting member framework 2 is welded by two parallel rectangular square plate and the floors in front and back, and central space can be held the hangers 19 of hammer handle locking relieving mechanism.Sensor sleeve 24 is according to the specification and the size customization of axial pin type sensor 12.
Hammer handle locking relieving mechanism is made up of parts such as locking release member framework 3, a pair of clamp 20, hangers 19; Their connecting relation is as follows: the clamp 20 of symmetric arrangement is fixed on locking release member framework 3 inside by pin, is connected by pin by bar group driving rotation and with the bar group end.Hangers 19 is by being bolted to locking release member frame roof.
Tension weight churning mechanism is made up of four awl tubes 21 of impulse member framework 6, impact tup 14, symmetric arrangement; Their connecting relation is as follows: impact tup 14 and pass the through hole of impulse member framework 6 central authorities and fix with high-strength bolt, four awl tubes of symmetric arrangement 21 are fixed in impulse member framework 6 upper surfaces by thread connection.The size of awl tube 21 and shape are according to the size and the specification customization of mechanical spring 5.
The upper punch saddle is made up of upper punch saddle spare framework 17 and upper punch sleeve 22.17 central authorities are provided with through hole and embed upper punch sleeve 22 at upper punch saddle spare framework.Upper punch 16 inserts in the upper punch sleeve 22.Upper punch 16 passes the upper punch sleeve 22 back other ends and inserts in mould 18 die cavitys.Upper punch sleeve 22 customizes according to upper punch 16 diameters.
As shown in Figure 2, two guide rods 7 parallel to each other pass the lifting member framework 2 of weight hoisting mechanism, the locking release member framework 3 of hammer handle locking relieving mechanism, the impulse member framework 6 and the upper punch saddle spare framework 17 of tension weight churning mechanism successively.Pass above-mentioned four framework parts at guide rod 7 and all installed and the supporting guide pin bushing of guide rod 7 diameters, make four frameworks do rectilinear motion along guide rod 7.Hangers 19 through-bore axis, axial pin type sensor 12 axis, three deads in line of lifting member framework 2 through-bore axis among Fig. 2 on the release member of the statement locking for convenience framework 3, shift out and break away from guide rod 7 so specially will lock relieving mechanism, but the locking relieving mechanism is connected on the guide rod 7 during practical set.
The upper beam 1 of fuselage ring is hung upside down and is fixed in the upper end of four mechanical springs 5 of symmetric arrangement by spring suspender 23, the spring stage casing is installed with spring spool 11, spring spool 11 is fixed on the weight hoisting mechanism by spring spool securing member 13, and the lower end of mechanical spring 5 freely contacts with the awl tube 21 of tension weight churning mechanism.
Shown in Fig. 2,3, on perpendicular to guide rod 7 directions, axial pin type sensor 12 passes the through hole of the hangers 19 of through hole that is embedded with sensor sleeve 24 that lifting member framework 2 central authorities of weight hoisting mechanism offer and hammer handle locking relieving mechanism, and through hole, axial pin type sensor 12 middle parts that the two ends of axial pin type sensor 12 snap in the sensor sleeve 24 of lifting member framework 2 are snapped in hangers 19 through holes.When mounted, can earlier hammer handle be locked in the hangers 19 incision lifting member frameworks 2 of relieving mechanism, and hangers 19 through holes are alignd with the through hole axle center of the sensor sleeve 24 of lifting member framework 2, and again axial pin type sensor 12 is inserted, string weight hoisting mechanism and hammer handle locking relieving mechanism.
Axial pin type sensor 12 can output to the curve of displacement and power in the outer computer after measuring the power that is produced by the spring compression, calculates the mechanical potential that mechanical spring 5 stores, and calculates impact energy by this.
More than She Ji press for high-speed pressing of powder metallurgy operation logic is as follows:
That the utility model can adopt is pneumatic, hydraulic pressure or other actuating units, energy is saved in mechanical spring, to compress the mechanical potential abrupt release of spring by a hammer handle locking relieving mechanism, drive to impact tup and reach above high-speed of 10m/s, reach of the requirement of HVC technology in the tension weight churning speed of compacting during moment, and shock wave passed to metal powder granulates by upper punch, make it the utmost point fine and close shaping in the short time.
The concrete course of work of press for high-speed pressing of powder metallurgy is as follows:
After hammer handle locking relieving mechanism locking tension weight churning mechanism impacted tup 14 afterbodys, hydraulic piston cylinder 15 oil-feeds and driving weight hoisting mechanism rose, and drive hammer handle locking relieving mechanism and tension weight churning mechanism simultaneously.At lifting process middle conical tube 21 contact mechanical spring 5 end faces and compressor mechanical springs 5, when the conical outer surface of awl tube 21 contacts with mechanical spring 5 spring wire inner ring helicoids, can adjust four mechanical springs 5 end face home position separately, make each mechanical spring 5 axis parallel with guide rod 7 axis.In compression spring process, lateral thrust can take place in spring stress, and spring spool 11 and securing member 13 thereof can effectively reduce perverted degree, and guarantees the stability of spring.After hammer handle locking relieving mechanism had discharged impact tup 14, spring drove impulse member framework 6 and drives the impact tup 14 bump upper punch of fixing on it 16, made bump moment upper punch 16 smoothly impact energy be passed to metal dust in the die cavity of mould 18.Upper punch saddle spare framework 17 and upper punch sleeve 22 all are to be used to set upright upper punch 16, and upper punch 16 is inserted in the mould 18.
Fig. 4 is four kinds of working state schematic representations of press for high-speed pressing of powder metallurgy.For convenience of description, specially cut locking releasing device open and hidden part front end parts.A, B, C and D are respectively the initial station behind the dress powder in the mould 18, locking station, promote station and impact station among the figure.
Initial station:
Fill metal dust in equipment mould 18 die cavitys, the impact tup 14 of tension weight churning mechanism freely is pressed on the upper punch 16.
The locking station:
This moment hydraulic piston cylinder 15 drainings, the weight hoisting mechanism descends, impact tup 14 afterbodys of tension weight churning mechanism close up clamping impact tup 14 afterbodys by the clamp 20 that the bar group drives locking release member framework 3 inside, and clamp 20 terminal outstanding shapes just contract go into to impact tup 14 afterbody grooves.
Promote station:
Impact station:
After the weight hoisting mechanism will impact tup 14 and give rise to assigned address, driving hammer handle locking relieving mechanism by external force unclamps clamp 20, awl tube 21 under the elastic force of mechanical spring 5 orders about on the impulse member framework 6 disengages the mechanical spring end face, tension weight churning mechanism impacts downwards at a high speed, drive the impact tup 14 violent bump upper punch 16 of impulse member framework 6, shock wave is passed to metal dust in mould 18 die cavitys, make it to finish the high velocity compacted process one time in the utmost point fine and close shaping in the short time.
Fuselage ring of the present utility model can also be for horizontal.
Claims (9)
1. press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy is characterized in that: this press for high-speed pressing of powder metallurgy comprises that fuselage ring, weight hoisting mechanism, tension weight churning mechanism, hammer handle locking relieving mechanism, mechanical spring and suspender, spring spool and securing member thereof, upper punch saddle and actuating unit form; Weight hoisting mechanism, hammer handle locking relieving mechanism, tension weight churning mechanism and upper punch saddle along linear slide are connected on the guide rod (7) successively; On perpendicular to guide rod (7) direction, axial pin type sensor (12) passes the through hole of the hangers (19) of through hole that is embedded with sensor sleeve (24) that lifting member framework (2) central authorities of weight hoisting mechanism offer and hammer handle locking relieving mechanism, and through hole, axial pin type sensor (12) middle part that the two ends of axial pin type sensor (12) snap in the sensor sleeve (24) of lifting member framework (2) snapped in the hangers through hole; One end of mechanical spring (5) hangs upside down and is fixed in the upper beam (1) of fuselage ring by spring suspender (23), mechanical spring (5) stage casing is installed with spring spool (11), spring spool (11) is fixed on the weight hoisting mechanism by spring spool securing member (13), and the other end of mechanical spring (5) freely contacts with the awl tube (21) of tension weight churning mechanism.
2. a kind of press for high-speed pressing of powder metallurgy according to claim 1 based on the mechanical spring accumulation of energy, it is characterized in that: described weight hoisting mechanism is by the lifting member framework (2) that has through hole and embeds the interior sensor sleeve (24) of through hole that spring spool (11) and spring spool securing member (13), symmetric arrangement and the direction of motion power original paper parallel with guide rod (7) axis formed; Their connecting relation is as follows: spring spool (11) is fixed on the hoisting frame framework (2) by spring spool securing member (13), and the power original paper is connected with lifting member framework (2) two ends.
3. a kind of press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy according to claim 2 is characterized in that: described power original paper is selected hydraulic piston cylinder (15) for use.
4. a kind of press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy according to claim 1 is characterized in that: paired clamp (20), locking release member framework (3), hangers (19) that described hammer handle locking relieving mechanism is driven by the bar group are formed; Their connecting relation is as follows: the clamp (20) that connects with the bar group by pin is fixed in the locking release member framework (3), and hangers (19) is fixed on locking release member framework (3) top.
5. a kind of press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy according to claim 1 is characterized in that: described tension weight churning mechanism by impulse member framework (6), impact tup (14), awl tube (21) is formed; Their connecting relation is as follows: impact tup (14) and pass impulse member framework (6) center through hole and fixing, awl tube (21) is fixed in the upper surface of impulse member framework (6).
6. a kind of press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy according to claim 1 is characterized in that: described upper punch saddle is made up of upper punch saddle spare framework (17), upper punch sleeve (22); Their connecting relation is as follows: upper punch sleeve (22) passes upper punch saddle spare framework (17) center through hole and fixing.
7. according to claim 1 or 2 or 4 or 5 or 6 described a kind of press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy, it is characterized in that: described lifting member framework (2), locking release member framework (3), impulse member framework (6) and upper punch saddle spare framework (17) all are being equipped with guide pin bushing by guide rod (7) place of passing.
8. a kind of press for high-speed pressing of powder metallurgy according to claim 1 based on the mechanical spring accumulation of energy, it is characterized in that: described fuselage ring is made up of pedestal (8), put the beams in place (1), column (4), guide rod (7), ditch screw (9), clamp nut (10), their connecting relation is as follows: an end of column (4) and guide rod (7) is separately fixed on the pedestal (8), and the other end is fastened on upper beam (1) after passing the through hole of upper beam (1) respectively.
9. a kind of according to claim 1 or 5 press for high-speed pressing of powder metallurgy based on the mechanical spring accumulation of energy is characterized in that: described fuselage ring is vertical or horizontal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202382289U CN201519765U (en) | 2009-10-30 | 2009-10-30 | Powder metallurgy high-speed pressing press based on mechanical spring energy storage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202382289U CN201519765U (en) | 2009-10-30 | 2009-10-30 | Powder metallurgy high-speed pressing press based on mechanical spring energy storage |
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| CN201519765U true CN201519765U (en) | 2010-07-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708550B (en) * | 2009-10-30 | 2011-07-06 | 华南理工大学 | Press for high-speed pressing of powder metallurgy on basis of mechanical spring energy storage |
| CN103240903A (en) * | 2013-05-19 | 2013-08-14 | 陈少梅 | Punching device for electromagnetic punching machine |
| CN103817331A (en) * | 2014-02-27 | 2014-05-28 | 华南理工大学 | Device and method for achieving powder metallurgy sintering material surface compacting through rolling |
| CN112976424A (en) * | 2021-04-02 | 2021-06-18 | 宁波顺兴开浩精工机械有限公司 | Matched die hammering device of matched die machine |
-
2009
- 2009-10-30 CN CN2009202382289U patent/CN201519765U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708550B (en) * | 2009-10-30 | 2011-07-06 | 华南理工大学 | Press for high-speed pressing of powder metallurgy on basis of mechanical spring energy storage |
| CN103240903A (en) * | 2013-05-19 | 2013-08-14 | 陈少梅 | Punching device for electromagnetic punching machine |
| CN103817331A (en) * | 2014-02-27 | 2014-05-28 | 华南理工大学 | Device and method for achieving powder metallurgy sintering material surface compacting through rolling |
| CN103817331B (en) * | 2014-02-27 | 2016-09-21 | 华南理工大学 | The device and method of powder metallurgy sintered material surface densification is realized by rolling |
| CN112976424A (en) * | 2021-04-02 | 2021-06-18 | 宁波顺兴开浩精工机械有限公司 | Matched die hammering device of matched die machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100707 Effective date of abandoning: 20091030 |