CN108176464A - The breaking method and breaker of NdFeB magnetic powder aggregate - Google Patents
The breaking method and breaker of NdFeB magnetic powder aggregate Download PDFInfo
- Publication number
- CN108176464A CN108176464A CN201810152379.6A CN201810152379A CN108176464A CN 108176464 A CN108176464 A CN 108176464A CN 201810152379 A CN201810152379 A CN 201810152379A CN 108176464 A CN108176464 A CN 108176464A
- Authority
- CN
- China
- Prior art keywords
- magnetic powder
- ndfeb magnetic
- powder aggregate
- breaker
- damping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 38
- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 239000004744 fabric Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 238000013016 damping Methods 0.000 claims description 24
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 7
- 244000035744 Hura crepitans Species 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 208000002925 dental caries Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/20—Disintegrating members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/16—Mills provided with vibrators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses a kind of breaking method and breaker of NdFeB magnetic powder aggregate, described device includes：Vibromill mechanism, middle part are equipped with vibration cavity driven, vibration grinding media are equipped in the vibration cavity body, top is equipped with the feed inlet being connected with the vibration cavity, bottom end is equipped with the discharge gate being connected with the vibration cavity；Blimp, is arranged on the outside of vibromill, and side wall is equipped with the discharge port being connected with the discharge gate；Collecting mechanism, the cloth bag that is flexible coupling including charging basket and for material being transferred to from discharge port charging basket.The present invention has the advantages of crushing efficiency is high, noise-reducing and dustproof.
Description
Technical field
The present invention relates to aggregate crushing technology field, more particularly to a kind of breaking method of NdFeB magnetic powder aggregate
And breaker.
Background technology
In recent years, due to its excellent magnet homogeneity, high plasticity, NdFeB Bonded Magnets are in aerospace, vapour
The fields such as vehicle, nuclear industry are widely used.Agglutinate neodymium-iron-boron magnet is that magnetic powder particle is bonded in one by binding agent
It acts what is formed, in large-scale industrial production, to ensure that magnetic powder particle surface uniformly wraps binding agent, generally glues solid-like
Liquid adhesive is thoroughly mixed by knot agent dissolving with magnetic powder in mixing machine in organic solvent or directly.It is stirred
During will appear the short grained aggregate of a diameter of Centimeter Level, bonded permanent magnet generally requires micron-sized magnetic when being molded
Powder, it is therefore desirable to these larger Centimeter Level aggregates be crushed, the magnetic powder met the requirements.
It is existing to be broken for the broken general use jaw crusher (level-one crushes) of NdFeB magnetic powder aggregate and two pairs of rollers
Broken machine (two-stage crushing) combines repeatedly broken, and shattering process is complicated, and labor intensity is big, since aggregate contains binding agent, breaks
The fragment of sheet is susceptible to when broken, operator need to adjust two roller spacing repeatedly, to realize to the completely broken of aggregate, lead
Cause crushing efficiency is relatively low, operator's operation intensity is big.
Invention content
The purpose of the present invention is being directed to the problem of shattering process in the prior art is cumbersome, labor intensity is big, and carry
For a kind of breaking method of NdFeB magnetic powder aggregate；
It is a further object to provide a kind of breakers of NdFeB magnetic powder aggregate, and aggregate can be carried out
Fully broken, crushing efficiency is high.
The technical solution adopted to achieve the purpose of the present invention is：
A kind of breaking method of NdFeB magnetic powder aggregate of the present invention, includes the following steps：
Step 1, NdFeB magnetic powder aggregate is added in a vibration cavity body containing vibration grinding media, vibrates grinding media
NdFeB magnetic powder aggregate is crushed under vibration；
Step 2, after fully crushing, NdFeB magnetic powder is discharged via the cloth bag that is flexible coupling.
A kind of breaker of NdFeB magnetic powder aggregate of the present invention, including：
Vibromill mechanism, middle part are equipped with vibration cavity driven, vibration grinding media, top are equipped in the vibration cavity body
Equipped with the feed inlet being connected with the vibration cavity, bottom end is equipped with and the discharge gate that is connected of vibration cavity；
Blimp, is arranged on the outside of vibromill, and side wall is equipped with the discharge port being connected with the discharge gate；
Collecting mechanism, the cloth bag that is flexible coupling including charging basket and for material being transferred to from discharge port charging basket.
In the above-mentioned technical solutions, the blimp is equipped with door.
In the above-mentioned technical solutions, blimp is stainless steel casing, liner sound-proof material, for reducing vibromill shattering process
Influence of the middle noise to surrounding reduces noise hazard.
In the above-mentioned technical solutions, the feed inlet is horn-like.Ensure the smooth downslide of material.
In the above-mentioned technical solutions, the inlet port and outlet port are respectively positioned on the outside of the blimp.
In the above-mentioned technical solutions, the filler ratio of the vibromill is 0.6~0.8, preferably 0.7.
In the above-mentioned technical solutions, the vibration grinding media include 14~18 a diameter of 15mm rod iron and 5~9 it is straight
Diameter is the rod iron of 25mm.
In the above-mentioned technical solutions, damping is equipped between the vibromill and stationary plane.
In the above-mentioned technical solutions, the damping is damping sandbox, and the damping sandbox includes babinet and is contained in
Sand in the babinet, sand can absorb mechanical shock, play cushioning effect.
In the above-mentioned technical solutions, the damping is beam.
In the above-mentioned technical solutions, it is equipped in the beam in matrix distribution, the damping cavity being vertically arranged, it is described to subtract
The damping spring set in the same direction is equipped in shake cavity.
The breaking method of the breaker of above-mentioned NdFeB magnetic powder aggregate, includes the following steps：
Step 1, blimp is opened, vibration grinding media is placed in the vibration cavity body of vibromill；
Step 2, discharge port connects the cloth bag that is flexible coupling, and after closing blimp, powder aggregate to be broken is passed through charging
Mouth is reached in vibration cavity body；The motor of Vibration on Start-up mill, vibromill are started to work；Powder is completed broken during vibration；
Step 3, discharge：Material after crushing enters material via discharge gate and discharge port from the dust-proof cloth bag that is flexible coupling
In bucket 1.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, it is of the invention by realizing the broken of NdFeB magnetic powder aggregate for the vibromill of rod iron by medium, by using
Rational job parameter is satisfied the magnetic powder of granularity requirements, realizes the efficiency crushing of NdFeB magnetic powder aggregate, reduces
The labor intensity of operator.
2nd, the presence of blimp reduces the noise of operation process, reduces the harm to human body.
3rd, be flexible coupling the setting of cloth bag, has the function of dust-proof, prevents magnetic powder from generating dust pollution, green ring when exporting
It protects.
4th, the setting of cushioning effect, it may have the effect of noise reduction extends the service life of the present apparatus.
Description of the drawings
Fig. 1 show the structure diagram of the embodiment of the present invention 1.
Fig. 2 show the structure diagram of the embodiment of the present invention 3.
Wherein：1- charging baskets, 2- are flexible coupling cloth bag, 3- discharge ports, 4- feed inlets, 5- vibration cavitys, 6- blimps, 7- vibrations
Grinding media, 8- vibromills mechanism, 9- discharge gates, 10- beams, 11- damping cavitys, 12- damping springs.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
Embodiment 1
As shown in Figure 1, a kind of breaker of NdFeB magnetic powder aggregate of the present invention, including：
Vibromill mechanism 8, middle part are equipped with the interior vibration cavity 5 for setting vibration grinding media 7, and top is equipped with and the vibration cavity
5 feed inlets 4 being connected, bottom end are equipped with the discharge gate 9 being connected with the vibration cavity 5；
Blimp 6, is arranged on the outside of vibromill mechanism 8, and side wall is equipped with the discharge port being connected with the discharge gate 9
3；
Gather materials portion, the cloth bag 2 that is flexible coupling including charging basket 1 and for material being transferred to from discharge port 3 charging basket 1.
It is preferred that the blimp 6 is equipped with door.
Working method：
In use, after placing suitable vibration grinding media 7 in the vibration cavity 5 of vibromill mechanism 8, discharge port 3 connects soft
After connecting the correct closing of cloth bag 2, blimp 6, powder aggregate to be broken is reached by feed inlet 4 in vibration cavity 5；It opens
The motor of dynamic vibromill mechanism 8, vibromill mechanism 8 starts to work；Powder is completed to crush, from feed inlet 4 during vibration
Move to discharge gate 9, then to discharge port 3；The powder of broken completion is obtained from the dust-proof cloth bag 2 that is flexible coupling.
Easy airborne dust when magnetic powder discharges, therefore the breaker discharge port 3 installs the dust-proof cloth bag 2 that is flexible coupling additional, prevents out
The dust harzard of material process.
Since vibromill mechanism 8 uses the high-frequency vibration of oscillator, collision to realize and crushed to powder, noise in operation process
It is larger, the additional dress blimp 6 of vibromill mechanism.
It is preferred that the vibromill mechanism 8 is commercially available vibromill.
It is preferred that blimp 6 is stainless steel casing, liner sound-proof material, crushed for reducing vibromill mechanism
Influence of the noise to surrounding in journey reduces noise hazard.
It is preferred that the feed inlet 4 is horn-like.Ensure the smooth downslide of material.
It is preferred that the feed inlet 4 and discharge port 3 are respectively positioned on the outside of the blimp 6.
Embodiment 2
The present embodiment is improved on the basis of embodiment 1, and the filler ratio of the vibromill mechanism 8 is 0.6~0.8,
Preferably 0.7.
Preferably, the vibration grinding media 7 includes the rod iron and 5~9 a diameter of 25mm of 14~18 a diameter of 15mm
Rod iron.
The amplitude 9mm of the vibromill mechanism 8, the job parameter of frequency 1200r/min concentrate broken rear powder particles
Between the mesh of 100 mesh~500, requirement to granularity of magnet powder is suppressed to meet Agglutinate neodymium-iron-boron magnet.
Each inventory cannot be excessive during operation, should be less than the 10% of vibromill mechanism vibration cavity body volume, to ensure to shake
Son has enough oscillation spaces.
Embodiment 3
As shown in Fig. 2, the present embodiment is improved on the basis of embodiment 1 or 2, the vibromill mechanism 8 is with fixing
Damping is equipped between face.
It is preferred that the damping is damping sandbox, the damping sandbox includes babinet and is contained in described
Sand in babinet, sand can absorb mechanical shock, play cushioning effect.
It is preferred that the damping is beam 10.
It is preferred that be equipped in the beam 10 in matrix distribution, the damping cavity 11 being vertically arranged, it is described to subtract
The damping spring 12 set in the same direction is equipped in shake cavity 11.
The above is only the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (12)
1. the breaking method of NdFeB magnetic powder aggregate, which is characterized in that include the following steps：
Step 1, NdFeB magnetic powder aggregate is added in a vibration cavity body containing vibration grinding media, vibration grinding media is shaking
NdFeB magnetic powder aggregate is crushed under rotating ring border；
Step 2, after fully crushing, NdFeB magnetic powder is discharged via the cloth bag that is flexible coupling.
2. the breaking method of NdFeB magnetic powder aggregate as described in claim 1, which is characterized in that the vibration cavity setting
In blimp.
3. it can realize the breaker of the NdFeB magnetic powder aggregate of breaking method as described in claim 1, which is characterized in that packet
It includes：
Vibromill mechanism, middle part are equipped with vibration cavity driven, vibration grinding media are equipped in the vibration cavity body, top is equipped with
Feed inlet, the discharge gate that bottom end is equipped with and the vibration cavity is connected that cavity is connected are vibrated with described；
Blimp, is arranged on the outside of vibromill, and side wall is equipped with the discharge port being connected with the discharge gate；
Collecting mechanism, the cloth bag that is flexible coupling including charging basket and for material being transferred to from discharge port charging basket.
4. the breaker of NdFeB magnetic powder aggregate as claimed in claim 3, which is characterized in that the blimp is equipped with
Door.
5. the breaker of NdFeB magnetic powder aggregate as claimed in claim 3, which is characterized in that blimp includes stainless steel
Shell and the interior sound-proof material being lining in stainless steel casing.
6. the breaker of NdFeB magnetic powder aggregate as claimed in claim 3, which is characterized in that the feed inlet is loudspeaker
Shape.
7. the breaker of NdFeB magnetic powder aggregate as claimed in claim 3, which is characterized in that the feed inlet and discharging
Mouth is respectively positioned on the outside of the blimp.
8. the breaker of NdFeB magnetic powder aggregate as claimed in claim 3, which is characterized in that the vibromill mechanism
Filler ratio is 0.6~0.8.
9. the breaker of NdFeB magnetic powder aggregate as claimed in claim 3, which is characterized in that the vibration grinding media packet
Include the rod iron of 14~18 a diameter of 15mm and the rod iron of 5~9 a diameter of 25mm.
10. the breaker of NdFeB magnetic powder aggregate as claimed in claim 3, which is characterized in that the vibromill mechanism
Damping is equipped between stationary plane.
11. the breaker of NdFeB magnetic powder aggregate as claimed in claim 10, which is characterized in that the damping is
Damping sandbox, the damping sandbox include babinet and the sand being contained in the babinet.
12. the breaker of NdFeB magnetic powder aggregate as claimed in claim 10, which is characterized in that the damping is
Beam, the beam is interior to be equipped in matrix distribution, the damping cavity being vertically arranged, and interior be equipped with of the damping cavity sets in the same direction
The damping spring put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810152379.6A CN108176464A (en) | 2018-02-14 | 2018-02-14 | The breaking method and breaker of NdFeB magnetic powder aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810152379.6A CN108176464A (en) | 2018-02-14 | 2018-02-14 | The breaking method and breaker of NdFeB magnetic powder aggregate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108176464A true CN108176464A (en) | 2018-06-19 |
Family
ID=62552747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810152379.6A Pending CN108176464A (en) | 2018-02-14 | 2018-02-14 | The breaking method and breaker of NdFeB magnetic powder aggregate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108176464A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4316301A1 (en) * | 1992-06-20 | 1993-12-23 | Karl Neuhart | Grinding mill for dispersed metal oxide agglomerate - has numerous milling members on several stacked dispersion permeable separating floors in housing |
| JPH0645167A (en) * | 1992-07-22 | 1994-02-18 | Hitachi Powdered Metals Co Ltd | Manufacture of isotropic bond magnet |
| CN1087744A (en) * | 1992-06-01 | 1994-06-08 | 三菱麻铁里亚尔株式会社 | Be used to produce the solid resin coating magnetic and the manufacture method thereof of anisotropic bonded magnet |
| JPH06295805A (en) * | 1993-04-07 | 1994-10-21 | Asahi Chem Ind Co Ltd | Bond magnet forming material |
| JPH10256016A (en) * | 1997-03-06 | 1998-09-25 | Sumitomo Metal Mining Co Ltd | Resin-bonded magnet composition and resin-bonded magnet using the same |
| CN101480629A (en) * | 2009-02-10 | 2009-07-15 | 南京工程学院 | Vibrating motor direct drive type double-mass monotubular vibrating grinding mill |
| CN102982992A (en) * | 2012-08-02 | 2013-03-20 | 横店集团东磁股份有限公司 | Manufacturing method of room temperature wet pressing molding anisotropic bonding NdFeB magnet |
| CN206064523U (en) * | 2016-09-18 | 2017-04-05 | 四川园香园味业有限公司 | Grain grinding equipment |
| CN107096613A (en) * | 2017-07-03 | 2017-08-29 | 南京工程学院 | Simultaneously coil spring is not ground pitches with hybrid density medium bitubular double-mass vibrating |
| CN208098248U (en) * | 2018-02-14 | 2018-11-16 | 中核(天津)科技发展有限公司 | A kind of crushing device of NdFeB magnetic powder aggregate |
-
2018
- 2018-02-14 CN CN201810152379.6A patent/CN108176464A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087744A (en) * | 1992-06-01 | 1994-06-08 | 三菱麻铁里亚尔株式会社 | Be used to produce the solid resin coating magnetic and the manufacture method thereof of anisotropic bonded magnet |
| DE4316301A1 (en) * | 1992-06-20 | 1993-12-23 | Karl Neuhart | Grinding mill for dispersed metal oxide agglomerate - has numerous milling members on several stacked dispersion permeable separating floors in housing |
| JPH0645167A (en) * | 1992-07-22 | 1994-02-18 | Hitachi Powdered Metals Co Ltd | Manufacture of isotropic bond magnet |
| JPH06295805A (en) * | 1993-04-07 | 1994-10-21 | Asahi Chem Ind Co Ltd | Bond magnet forming material |
| JPH10256016A (en) * | 1997-03-06 | 1998-09-25 | Sumitomo Metal Mining Co Ltd | Resin-bonded magnet composition and resin-bonded magnet using the same |
| CN101480629A (en) * | 2009-02-10 | 2009-07-15 | 南京工程学院 | Vibrating motor direct drive type double-mass monotubular vibrating grinding mill |
| CN102982992A (en) * | 2012-08-02 | 2013-03-20 | 横店集团东磁股份有限公司 | Manufacturing method of room temperature wet pressing molding anisotropic bonding NdFeB magnet |
| CN206064523U (en) * | 2016-09-18 | 2017-04-05 | 四川园香园味业有限公司 | Grain grinding equipment |
| CN107096613A (en) * | 2017-07-03 | 2017-08-29 | 南京工程学院 | Simultaneously coil spring is not ground pitches with hybrid density medium bitubular double-mass vibrating |
| CN208098248U (en) * | 2018-02-14 | 2018-11-16 | 中核(天津)科技发展有限公司 | A kind of crushing device of NdFeB magnetic powder aggregate |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180619 |