CN109551614B - Ultrasonic device for powder compression molding - Google Patents
Ultrasonic device for powder compression molding Download PDFInfo
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- CN109551614B CN109551614B CN201811182200.8A CN201811182200A CN109551614B CN 109551614 B CN109551614 B CN 109551614B CN 201811182200 A CN201811182200 A CN 201811182200A CN 109551614 B CN109551614 B CN 109551614B
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- die
- ultrasonic
- vibration generator
- female die
- ultrasonic vibration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/022—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form combined with vibrating or jolting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/04—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with one ram per mould
Abstract
The invention relates to an ultrasonic device for powder pressing and forming, which comprises a die holder, a female die arranged on the die holder, and a male die arranged opposite to the female die, wherein the male die is matched with the female die and jointly forms a cavity for powder pressing; the method is characterized in that: be provided with at least one ultrasonic vibration generator in the die holder, the vibration output part of ultrasonic vibration generator faces the die sets up, wherein the die with be provided with at least one striking piece between the vibration output part of ultrasonic vibration generator, just the ultrasonic vibration generator can drive striking piece comes right the die strikes. According to the invention, the ultrasonic vibration generator is used for driving the impact piece to impact the female die, so that the ultrasonic device generates large vibration energy and high frequency to the powder material when working, and further, the product obtained by compression molding of the ultrasonic device has high compactness and good mechanical property.
Description
Technical Field
The invention belongs to the technical field related to powder pressing, and particularly relates to an ultrasonic device for powder pressing forming.
Background
Powder compaction is the process used to make loose powders into semi-finished or finished products of predetermined geometry, size, density and strength.
The ceramic powder forming technology is characterized in that zirconia powder, zirconia powder and a forming agent are mixed to serve as raw materials, and the raw materials are manufactured through dry pressing forming and sintering processes.
At present, ceramic is pressed and formed, specifically, powder is pressed into a required shape under the static pressure of a press machine and a die and the pressure of 15-600MPa, and because the zirconia material is hard and brittle and has irregular edges and corners in a microcosmic view, after the powder is pressed and formed under the action of the static pressure, a plurality of gaps exist among particles and air holes can be formed, so that the compactness of the formed material is low, and the mechanical properties of the ceramic panel, such as hardness, strength, wear resistance, high temperature resistance and corrosion resistance, can be influenced.
Specifically, a powder press molding apparatus (application number: 2017107076452) disclosed in the chinese patent specifically discloses that vibration generated by air flow of inlet and outlet air drives a film layer to shake, thereby uniformly mixing powder and filling gaps between powder.
However, when the powder compression molding device works, because the energy generated by adopting the membrane vibration is low, the frequency is small, the transmission range is limited, only slight movement close to the surface material of the membrane can be caused, and the whole component material is not dense enough, so that the mechanical property of a product after compression molding can be influenced; moreover, this effect is not present after pressing, which does not solve the problem of the disorganization of the powder arrangement during pressing.
Disclosure of Invention
In view of the above, it is necessary to provide an ultrasonic device for powder press molding, which solves the technical problems in the prior art.
The ultrasonic device for powder pressing forming comprises a die holder, a female die arranged on the die holder, and a male die arranged opposite to the female die, wherein the male die is matched with the female die and jointly forms a cavity for powder pressing; the method is characterized in that: be provided with at least one ultrasonic vibration generator in the die holder, the vibration output part of ultrasonic vibration generator faces the die sets up, wherein the die with be provided with at least one striking piece between the vibration output part of ultrasonic vibration generator, just the ultrasonic vibration generator can drive striking piece comes right the die strikes.
As a preferable scheme of the invention, the ultrasonic vibration generator comprises an ultrasonic transducer and an amplitude transformer arranged on the ultrasonic transducer; one end of the amplitude transformer is fixedly connected with the ultrasonic transducer, the other end of the amplitude transformer is arranged facing the female die, and the impact piece is placed on the end face, facing the female die, of one side of the amplitude transformer and is in butt fit with the female die.
As a preferable mode of the present invention, the ultrasonic vibration generator further includes a guide sleeve that is sleeved on the horn and slides relative to the horn.
As a preferable aspect of the present invention, the ultrasonic vibration generator further includes an elastic support member for supporting the ultrasonic transducer, and the elastic support member is capable of elastically adjusting the support of the ultrasonic transducer.
As a preferable scheme of the present invention, the elastic support is a spring, and two ends of the spring respectively stop against the ultrasonic transducer and the die holder.
As a preferable scheme of the invention, the impact piece is a steel ball, and a plurality of steel balls are arranged between the amplitude transformer and the female die.
As a preferable scheme of the invention, a sheath is fixed at one end of the amplitude transformer facing the female die, and a plurality of steel balls are arranged on the sheath and are in butt fit with the female die.
As a preferable aspect of the present invention, the ultrasonic apparatus further includes a cooling system for cooling the ultrasonic vibration generator.
As a preferable aspect of the present invention, the cooling system includes an air pipe joint, the air pipe joint is disposed on a die holder cover plate of the die holder, and is configured to introduce cold air into the die holder, and the cold air can pass through the ultrasonic vibration generator and be discharged from an assembly gap between the female die and the die holder.
As a preferable scheme of the present invention, a plurality of ultrasonic vibration generators are provided in the die holder.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the ultrasonic device for powder press forming, in the powder press forming process, the ultrasonic vibration generator is used for driving the impact piece to impact the female die, so that the ultrasonic device generates large vibration energy and high frequency to powder materials when working, and further, a product obtained by the ultrasonic device through press forming is high in compactness and has good mechanical properties.
Drawings
Fig. 1 is a sectional view of an ultrasonic apparatus for powder press molding according to the present invention.
FIG. 2 is a schematic structural view of the female mold of the present invention.
Wherein, 10, the die holder; 11. an intermediate die; 12. an assembly hole; 13. a die holder cover plate; 14. a convex column; 20. a female die; 21. a diversion trench; 30. a male die; 40. an ultrasonic vibration generator; 41. an ultrasonic transducer; 42. an amplitude transformer; 43. an elastic support member; 44. a stud; 45. a guide sleeve; 50. a striker; 61. a gas pipe joint; 230. a chamber; 421. a sheath.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
The ultrasonic device for powder press forming is used for adding ultrasonic vibration in the powder press forming process, so that low-frequency impact and high-frequency ultrasonic vibration are transmitted in each powder, the powder is filled in gaps generated by sharp corners, and self-adaptive coordination positions are disordered, so that the compactness of a product formed by the ultrasonic device on a powder material in a press forming mode is improved.
Referring to fig. 1, the ultrasonic device for powder press forming according to the present invention includes a die holder 10, a female die 20 disposed on the die holder 10, a male die 30 disposed opposite to the female die 20, and an ultrasonic vibration generator 40 disposed in the die holder 10 for generating ultrasonic vibration. Wherein the female die 20 is engaged with the male die 30 and together forms a chamber 230 for powder pressing. The vibration output part of the ultrasonic vibration generator 40 is arranged facing the female die 20, and at least one striking piece 50 is arranged between the two parts, so that the ultrasonic vibration generator 40 can drive the striking piece 50 to strike the female die 20.
The die holder 10 is a supporting structural member of the ultrasonic device and is used for supporting the female die 20 placed thereon, so that the male die 30 is driven by the press to press and be matched with the female die 20.
In this embodiment, the die holder 10 includes an intermediate die 11, the intermediate die 11 is disposed between the die holder 10 and the concave die 20 and is respectively and fixedly connected to the die holder 10 and the concave groove 20, and specifically, the intermediate die 11 and the die holder 10, and the intermediate die 11 and the concave die 20 can be respectively and fixedly connected by a cylindrical pin 101 and a screw 102, so as to ensure the assembling accuracy between the die holder 10 and the intermediate die 11, and between the intermediate die 11 and the concave die 20. The die holder 10 and the intermediate die 11 are respectively provided with an assembling hole 12 for assembling the ultrasonic vibration generator 40.
It can be understood that the split structure of the die holder 10 and the intermediate die 11 of the present embodiment facilitates the opening of the assembling hole 12 for assembling the ultrasonic vibration generator 40 during the production and preparation of the die holder 10, that is, facilitates the production and preparation of the die holder 10.
The ultrasonic vibration generator 40 is configured to generate ultrasonic vibration, and drive the striking member 50 to strike the female die 20 in an ultrasonic vibration manner. In this embodiment, a plurality of ultrasonic vibration generators 40 are disposed in the die holder 10, and the number of the ultrasonic vibration generators 40 can be specifically set according to the requirement of the cavity 230 between the female die 20 and the male die 30 for pressing powder.
Specifically, the ultrasonic vibration generator 40 includes an ultrasonic transducer 41, an amplitude transformer 42 provided on the ultrasonic transducer 41, and an elastic support 43; one end of the amplitude transformer 42 is fixedly connected with the ultrasonic transducer 41, and specifically can be fixedly connected with a stud 44; the other end of the amplitude transformer 42 faces the groove 20, and the striking piece 50 is placed on the end face of one side of the amplitude transformer 42 facing the female die 20 and is in butt fit with the female die 20. That is, the end surface of the horn 42 facing the die 20 in the present embodiment is the vibration output portion of the ultrasonic vibration generator 40. And when the ultrasonic vibration generator 40 works, the transducer 41 can generate ultrasonic high-frequency vibration after being powered on, the amplitude transformer 42 amplifies the high-frequency vibration generated when the transducer 41 works, and ultrasonic energy is concentrated on the impact piece 50 arranged on the amplitude transformer 42 to drive the high-frequency vibration.
The elastic supporting member 43 is used for supporting the ultrasonic transducer 41, and the elastic supporting member 43 can elastically adjust the support of the ultrasonic transducer 41, so that the elastic supporting member 43 can provide a reaction force for the vibration generated when the ultrasonic transducer 41 works, so that the ultrasonic transducer 41 drives the striker 50 through the amplitude transformer 42 by high-frequency vibration.
Specifically, the elastic support 43 is a spring, and two ends of the spring respectively abut against the ultrasonic transducer 41 and the die holder 10. Wherein the spring is preferably a compression spring. Furthermore, two ends of the spring are respectively sleeved on the ultrasonic transducer 41 and the convex column 14 of the die holder 10 upper die holder cover plate 13 to limit the spring, so that deviation is prevented when the spring provides a counterforce of vibration of the ultrasonic transducer 41.
In this embodiment, the ultrasonic vibration generator 40 further includes a guide sleeve 45, and the guide sleeve 45 is sleeved on the horn 42 and is slidably connected with respect to the horn 42. So that the amplitude transformer 42 is limited and guided by the guide sleeve 45. Wherein the uide bushing 45 sets up in the pilot hole 12 of die holder 10, and with pilot hole 12 clearance fit for uide bushing 45 is in reciprocating up and down slides can carry out in the die holder 10.
The striking member 50 is driven by the horn 42 to strike the female die 20 to perform a vibratory drive on the powder in the chamber 230 between the female die 20 and the male die 30.
In this embodiment, the striking members 50 are steel balls, and a plurality of steel balls are disposed between each horn 42 and the die 20, and preferably two steel balls are disposed between each horn 42 and the die 20.
It can be understood that, this embodiment is the structural setting of striking piece 50 through the steel ball, the conduction problem of ultrasonic vibration energy in heavy high-pressure structural component has been solved, make amplitude transformer 42's high-frequency vibration, when the steel ball conduction gives die 20, become the steel ball to die 20's low frequency impact and high-frequency vibration's compound motion, and then make die 20 conduct arrange die 20 and the vibration of the powder in the cavity 230 between the terrace die 30 also be low frequency impact and high-frequency vibration's compound motion, make vibration distribution more even, and the effect is better.
Further, a sheath 421 is fixed to one end of the horn 42 facing the female die 20, and the plurality of steel balls are disposed on the sheath 421 and are in abutting engagement with the female die 20. When the amplitude transformer 42 drives the steel ball to vibrate at high frequency, the sheath 421 is in direct contact with the steel ball, so that the amplitude transformer 42 is protected, and the service life of the amplitude transformer 42 is prolonged.
As a preferred embodiment of the present invention, the ultrasonic apparatus of the present invention further includes a cooling system for cooling the ultrasonic vibration generator 40, specifically for cooling the ultrasonic transducer 41 on the ultrasonic vibration generator 40.
Specifically, the cooling system includes an air pipe joint 61, the air pipe joint 61 is disposed on the die holder cover plate 13 of the die holder 10, and is configured to introduce cold air into the die holder 10, and the cold air can pass through the ultrasonic vibration generator 40 and is discharged from an assembly gap between the die 20 and the die holder 10, so as to cool the ultrasonic vibration generator 40. That is, when the ultrasonic vibration generator 40 is fitted in the fitting hole 12 of the die holder 10, a certain gap is left between the ultrasonic vibration generator and the fitting hole 12 of the die holder 10 to serve as a flow passage for cold air. Referring to fig. 2, the die 20 has a plurality of flow guiding grooves 21 formed on an end surface of a side facing the die holder 10 for guiding the outflow of cold air.
In summary, in the powder compression molding process, the ultrasonic vibration generator is used for driving the impact piece to impact the female die, so that the ultrasonic device generates large vibration energy and high frequency to the powder material during working, and further the product obtained by compression molding through the ultrasonic device has high compactness and good mechanical property.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An ultrasonic device for powder pressing forming comprises a die holder, a female die arranged on the die holder, and a male die arranged opposite to the female die, wherein the male die is matched with the female die and jointly forms a cavity for powder pressing; the method is characterized in that: at least one ultrasonic vibration generator is arranged in the die holder, a vibration output part of the ultrasonic vibration generator faces the female die, at least one impact piece is arranged between the female die and the vibration output part of the ultrasonic vibration generator, and the ultrasonic vibration generator can drive the impact piece to impact the female die;
the impact piece is a steel ball.
2. The ultrasonic device for powder press forming according to claim 1, wherein: the ultrasonic vibration generator comprises an ultrasonic transducer and an amplitude transformer arranged on the ultrasonic transducer; one end of the amplitude transformer is fixedly connected with the ultrasonic transducer, the other end of the amplitude transformer is arranged facing the female die, and the impact piece is placed on the end face, facing the female die, of one side of the amplitude transformer and is in butt fit with the female die.
3. The ultrasonic device for powder press forming according to claim 2, wherein: the ultrasonic vibration generator also comprises a guide sleeve which is sleeved on the amplitude transformer and can slide relative to the amplitude transformer.
4. The ultrasonic device for powder press forming according to claim 2, wherein: the ultrasonic vibration generator further comprises an elastic supporting piece, the elastic supporting piece is used for supporting the ultrasonic transducer, and the elastic supporting piece can elastically adjust the support of the ultrasonic transducer.
5. The ultrasonic device for powder press forming according to claim 4, wherein: the elastic supporting piece is a spring, and two ends of the spring are respectively abutted against the ultrasonic transducer and the die holder.
6. The ultrasonic device for powder press forming according to claim 2, wherein: and a plurality of steel balls are arranged between the amplitude transformer and the female die.
7. The ultrasonic device for powder press forming according to claim 6, wherein: and a sheath is fixed at one end of the amplitude transformer facing the female die, and a plurality of steel balls are arranged on the sheath and are in butt fit with the female die.
8. The ultrasonic device for powder press forming according to claim 1, wherein: the ultrasonic device further comprises a cooling system for cooling the ultrasonic vibration generator.
9. The ultrasonic device for powder press forming according to claim 8, wherein: the cooling system comprises an air pipe connector, the air pipe connector is arranged on a die holder cover plate of the die holder and used for guiding cold air into the die holder, and the cold air can pass through the ultrasonic vibration generator and is discharged from an assembly gap between the die and the die holder.
10. The ultrasonic device for powder press forming according to claim 1, wherein: a plurality of ultrasonic vibration generators are arranged in the die holder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811182200.8A CN109551614B (en) | 2018-10-11 | 2018-10-11 | Ultrasonic device for powder compression molding |
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| CN201811182200.8A CN109551614B (en) | 2018-10-11 | 2018-10-11 | Ultrasonic device for powder compression molding |
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| CN109551614B true CN109551614B (en) | 2021-04-20 |
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| CN110341231B (en) * | 2019-06-20 | 2021-08-03 | 南京理工大学 | Axial ultrasonic auxiliary pressing device and pressing method |
| CN111483034B (en) * | 2020-05-25 | 2021-08-20 | 南通华兴磁性材料有限公司 | Forming method of flat ultra-thin manganese-zinc ferrite magnetic core |
| CN114619029B (en) * | 2022-01-31 | 2022-11-29 | 江苏海曼特电气有限公司 | Compacting die for powder metallurgy production |
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