CN106827554A - A kind of ultrasonic activation mode conversion method and large scale Ultrasonic Plastic boxing system - Google Patents
A kind of ultrasonic activation mode conversion method and large scale Ultrasonic Plastic boxing system Download PDFInfo
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- CN106827554A CN106827554A CN201611193613.7A CN201611193613A CN106827554A CN 106827554 A CN106827554 A CN 106827554A CN 201611193613 A CN201611193613 A CN 201611193613A CN 106827554 A CN106827554 A CN 106827554A
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- ultrasonic
- soldering tip
- dish type
- metal ring
- large scale
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses a kind of ultrasonic activation mode conversion method, using the mutual transfer principle of mode of oscillation of extensional vibration-flexural vibrations-extensional vibration, comprise the following steps：Step one, the ultrasonic wave that the ultrasonic wave of longitudinal vibration mode is converted to flexural vibration mode；Step 2, metal ring soldering tip is fixed on the vibration wave amplitude position that dish type indulges curved vibratory converter flexural vibration mode, the metal ring soldering tip is worked in longitudinal vibration mode.The invention also discloses a kind of large scale Ultrasonic Plastic boxing system, the system is used to realize the ultrasonic bonding of ultrasonic activation mode conversion and large scale plastic weld.The present invention expands traditional Ultrasonic Plastic Welding systematic difference scope, reduces production cost, improves the operating efficiency of traditional Ultrasonic Plastic Welding system.
Description
Technical field
The invention belongs to Ultrasonic Plastic Welding field, and in particular to a kind of ultrasonic activation mode conversion method and big chi
Very little Ultrasonic Plastic boxing system.
Background technology
Ultrasonic Plastic Welding is the high-tech technology of welding thermoplastic articles, and various thermoplastic cement parts can be used
Ultrasonic fusing treatment, in welding plastic product, should not both add any bonding agent, filler or solvent, also not consume a large amount of
Thermal source, has the advantages that easy to operate, speed of welding is fast, weld strength is high, production efficiency is high.Therefore, ultrasonic welding technique
Applied more and more widely.
Ultrasonic Plastic Welding have been widely used for automobile, electronics, medical treatment, household electrical appliances, without cotton ready made clothings, office appliance, bag
It is filled with and toy industry etc..Such as vehicle body plastic part, arrangements for automotive doors, automobile instrument, car light car mirror, sunshading board, inside gadget, filter
Clear device, Cellphone Accessories, charger, toy stationery, print cartridge, toner cartridge, washing machine, electric iron, dust catcher etc..
Traditional Ultrasonic Plastic Welding system is usually by ultrasonic transducer, ultrasonic amplitude transformer and suitable for difference
The first-class composition of ultrasonic bonding tool of part geometry to be welded, such as Patent No. CN201320437227.3, proprietary term
The referred to as Chinese invention patent of ultrasonic welding machine；Patent No. CN201220185648.7, patent name are bearing for another example
The Chinese invention patent of plastic cage ultrasonic brazing unit.Traditional Ultrasonic Plastic Welding system, its operation principle is
Longitudinal vibration mode based on ultrasonic vibration system, i.e. large-power supersonic transducer produce extensional vibration, are shaken by longitudinal direction
After dynamic ultrasonic transformer carries out vibration displacement amplification, promote soldering appliance head to produce with the ultrasonic activation of frequency, ultrasonic energy is transmitted
To welding zone, because acoustic resistance is big at welding zone, therefore localized hyperthermia can be produced.Again due to plastics poor thermal conductivity, for the moment can't be timely
Distribute, be gathered in welding zone, cause the contact surface of two plastics to melt rapidly, after adding certain pressure, be fused into one it, it is complete
Into the whole process of Ultrasonic Plastic Welding.
Because such ultrasonic vibration system is designed based on traditional one-dimensional longitudinal vibration theory, ordinary circumstance
Under, the lateral dimension of such Ultrasonic Plastic Welding system should be less than a quarter of longitudinal wavelength, therefore, traditional ultrasonic wave
The lateral dimension of Plastic Welding system is restricted, it is impossible to for the ultrasonic bonding of larger physical dimension device.
The content of the invention
In order to the lateral dimension for solving traditional Ultrasonic Plastic Welding system is restricted, it is impossible to for larger dimensioning
The ultrasonic bonding of very little device, the invention provides a kind of ultrasonic activation mode conversion method and large scale Ultrasonic Plastic ring
Weldering system.The technical proposal of the invention is realized in this way：
A kind of ultrasonic activation mode conversion method, the mode of oscillation using extensional vibration-flexural vibrations-extensional vibration is mutual
Transfer principle, comprises the following steps：
Step one, the ultrasonic wave that the ultrasonic wave of longitudinal vibration mode is converted to flexural vibration mode；
Step 2, metal ring soldering tip is fixed on the vibration wave amplitude position that dish type indulges curved vibratory converter flexural vibration mode,
The metal ring soldering tip is set to work in longitudinal vibration mode.
Above-mentioned ultrasonic activation mode conversion method, the step one is to indulge curved vibratory converter with ultrasound by dish type
The connection of ripple ultrasonic transformer, the ultrasonic wave of the longitudinal vibration mode that transducer and ultrasonic variable amplitude bar are produced is converted to flexural vibrations
The ultrasonic wave of mode.
Above-mentioned ultrasonic activation mode conversion method, the transducer, the ultrasonic variable amplitude bar, the dish type indulge curved
Vibratory converter and the metal ring soldering tip are in resonance state.
A kind of large scale Ultrasonic Plastic boxing system, including convert electrical energy into the transducer of mechanical oscillation, for converging
The ultrasonic variable amplitude bar and metal ring soldering tip of poly- ultrasonic wave, ultrasonic wave receiving terminal and the transducing of the ultrasonic variable amplitude bar
The ultrasonic wave output terminal of device is fixedly connected, and also turns including being used to be received from the longitudinal mode ultrasonic wave of the ultrasonic variable amplitude bar
The dish type for being changed to flexural vibration mode ultrasonic wave indulges curved vibratory converter；
The ultrasonic wave output terminal of the ultrasonic variable amplitude bar is fixedly connected the dish type and indulges curved vibratory converter, the metal ring
Soldering tip may be detachably retained at the dish type and indulge on curved vibratory converter, and the dish type is indulged curved vibratory converter and is placed in institute
State between ultrasonic variable amplitude bar and the metal ring soldering tip.
Particularly point out, in order to expand traditional Ultrasonic Plastic Welding systematic difference scope, metal ring of the invention
Soldering tip is preferably large-sized metal ring soldering tip.
Used as a preferred embodiment of the present invention, the dish type indulges the thickness of curved vibratory converter less than the ten of its diameter
/ mono-.
Used as a preferred embodiment of the present invention, the ultrasonic variable amplitude bar is indulged curved vibratory converter and is connect with the dish type
The size of contacting surface indulges 1/10th of curved vibratory converter flexural vibrations wavelength less than the dish type.
Used as a preferred embodiment of the present invention, the metal ring soldering tip indulges curved vibratory converter positioned at the dish type
Flexural vibrations displacement wave amplitude at, and the radial thickness of the metal ring soldering tip indulges curved vibratory converter less than the dish type
/ 10th of flexural vibrations wavelength.
Used as a preferred embodiment of the present invention, the outer wall of the metal ring soldering tip is provided with multiple grooves, and
The groove is communicated with the inner chamber of metal ring soldering tip.
Used as a preferred embodiment of the present invention, the transducer, ultrasonic variable amplitude bar and metal ring soldering tip are vertical
Curved vibratory converter is indulged in the dish type to set.
Used as a preferred embodiment of the present invention, the transducer, ultrasonic variable amplitude bar, dish type indulge curved vibratory converter
And each self-resonant frequency of metal ring soldering tip is identical with the vibration frequency of ultrasonic wave annular plastics welding system.
Beneficial effects of the present invention：
Compared with traditional one-dimensional longitudinal vibration system, present invention utilizes shaking for extensional vibration-flexural vibrations-extensional vibration
The principle that dynamic model state is mutually changed, realizes the large scale output of Ultrasonic Plastic Welding system.Therefore, the present invention expands biography
The Ultrasonic Plastic Welding systematic difference scope of system, reduces production cost, improves traditional Ultrasonic Plastic Welding system
The operating efficiency of system.
The present invention is described in further details below with reference to drawings and Examples.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is the structural representation of bimetallic annulus soldering tip of the present invention.
In figure：1. transducer；2. ultrasonic variable amplitude bar；3. dish type indulges curved vibratory converter；4. metal ring soldering tip；10.
Sandwich piezoelectric ceramic transducer；401. large scale metal ring soldering tips I；402. large scale metal ring soldering tips II.
Specific embodiment
Technological means and effect that predetermined purpose is taken are reached for the present invention is expanded on further, below in conjunction with accompanying drawing and reality
Example is applied to specific embodiment of the invention, architectural feature and its effect, is described in detail as follows.
It should be noted that：Term of the invention " on ", D score, " top surface ", " bottom surface ", " interior ", the side of the instruction such as " outward "
Position or position relationship are, based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and described with simplified,
Rather than indicate imply signified device or element must have specific orientation, with specific azimuth configuration and operation, because
This is not considered as limiting the invention.
Embodiment 1：
The present invention is the principle that make use of the mode of oscillation of extensional vibration-flexural vibrations-extensional vibration mutually to change, and is disclosed
A kind of ultrasonic activation mode conversion method, the method is comprised the following steps：
Step one, the ultrasonic variable amplitude bar 2 in longitudinal vibration mode is indulged curved vibratory converter 3 and contacted with dish type so that disk
Shape is indulged curved vibratory converter 3 and is in flexural vibration mode；
Step 2, the dish type in flexural vibration mode is indulged curved vibratory converter 3 and contacted with metal ring soldering tip 4 so that be golden
Category annulus soldering tip 4 is in longitudinal vibration mode.
Ultrasonic variable amplitude bar 2, dish type in the method indulges curved vibratory converter 3 and metal ring soldering tip 4 is in resonance
Ultrasonic variable amplitude bar 2, dish type in state, and the present embodiment indulges the work of curved vibratory converter 3 and metal ring soldering tip 4 frequently
Rate can according to actual needs carry out specific design, as long as Ultrasonic Plastic Welding work can be completed.
Reference picture 1, the present embodiment emphasis discloses a kind of large scale for realizing ultrasonic activation mode conversion method
Ultrasonic Plastic boxing system, it includes that the other end of transducer 1, ultrasonic variable amplitude bar 2 and ultrasonic variable amplitude bar 2 is fixed and connects
The dish type for connecing indulges curved vibratory converter 3 and metal ring soldering tip 4, and one end of ultrasonic variable amplitude bar 2 is fixedly connected with transducer 1,
Dish type indulges curved vibratory converter 3 positioned at the top of large scale metal ring soldering tip, and dish type indulges curved vibratory converter 3 with large scale gold
Category annulus soldering tip is fixedly connected.Being fixedly connected for the present embodiment preferably uses dismountable mode.
Wherein, large scale metal ring soldering tip is indulged at the flexural vibrations displacement wave amplitude of curved vibratory converter 3 positioned at dish type, excellent
Select large scale metal ring soldering tip to be rigidly secured to dish type to indulge at the flexural vibrations displacement wave amplitude of curved vibratory converter 3.
Wherein, the transducer 1 of the present embodiment, ultrasonic variable amplitude bar 2 and large scale metal ring soldering tip should be strictly perpendicular to
Dish type indulges curved vibratory converter 3.
Wherein, in order to ensure the unicity of the longitudinal vibration mode in large scale loop-shaped ultrasound Plastics jointing tool, it is to avoid shake
Coupling between dynamic model formula, the outer wall of large scale metal ring soldering tip is provided with multiple grooves, groove and large scale metal ring
The inner chamber of soldering tip communicates.It is preferred that in the short transverse processing certain amount of large scale metal ring soldering tip and certain physical dimension
Straight trough.
Wherein, being fixedly connected of the transducer 1 in the present embodiment and ultrasonic variable amplitude bar 2, ultrasonic variable amplitude bar 2 and dish type
Being fixedly connected of vertical curved vibratory converter 3, dish type indulge being fixedly connected for curved vibratory converter 3 and large scale metal ring soldering tip,
Can be using any fixed forms such as welding of the prior art, threaded connection, riveting, clampings, as long as large scale can be met
Ultrasonic Plastic boxing system is rigidly connected.It is preferred that being fixedly connected in the prestressing force using high intensity in the present embodiment
Heart metal bolts are connected, and this fixed form can make the whole system have good stability.
Wherein, ultrasonic variable amplitude bar 2 is made up of the elastic big, metal material that intensity is high, mechanical loss is small, such as titanium alloy,
Alloy aluminum, almag, stainless steel or copper etc..The cross sectional shape of ultrasonic variable amplitude bar 2 can be cone, exponential type, stretched wire
Linear, stepped and its compound shape composition.
Wherein, dish type is indulged curved vibratory converter 3 and is made up of the elastic big, metal material that intensity is high, mechanical loss is small, such as titanium
Alloy, alloy aluminum, almag, stainless steel or copper etc..It is preferred that dish type indulges curved vibratory converter 3 for uiform section disc structure.
Wherein, large scale metal ring soldering tip is made up of the elastic big, metal material that intensity is high, mechanical loss is small, its material
Material can be titanium alloy, aluminium alloy, almag, stainless steel or copper etc..It is preferred that metal ring soldering tip 4 is circular ring with constant cross section structure.
It may be noted that in the present embodiment, to ensure the contact surface of each part of large scale Ultrasonic Plastic boxing system
Between be in close contact, reduce mechanical loss, improve energy transmission efficiency etc., each of large scale Ultrasonic Plastic boxing system connects
Tactile surface should ensure that flatness and finish higher.
It may be noted that the technological requirement in order to meet ultrasonic activation mode conversion, a kind of large scale that the present embodiment is proposed
In Ultrasonic Plastic boxing system, preferably dish type indulges the thickness of curved vibratory converter 3 less than 1/10th of its diameter；It is preferred that super
The size that sound wave ultrasonic transformer 2 indulges the contact surface of curved vibratory converter 3 with dish type indulges the flexural vibrations ripple of curved vibratory converter 3 less than dish type
Long 1/10th；It is preferred that the wall thickness of large scale metal ring soldering tip should be less than dish type indulges the flexural vibrations ripple of curved vibratory converter 3
Long 1/10th.Also, the preferred sandwich piezoelectric ceramic transducer 10 of transducer in the present embodiment, sandwich piezoelectricity
The resonant frequency of ceramic ultrasonic 10, power output and intensity should be determined according to the situation of actual relay part to be welded.
Particularly point out, the transducer 1 of the present embodiment, ultrasonic variable amplitude bar 2, dish type indulge curved vibratory converter 3 and large scale
Each self-resonant frequency of metal ring soldering tip is consistent with the vibration frequency of ultrasonic wave annular plastics welding system.
Compared with traditional one-dimensional longitudinal vibration system, the present embodiment make use of extensional vibration-flexural vibrations-longitudinal direction to shake
The principle that dynamic mode of oscillation is mutually changed, realizes the large scale output of Ultrasonic Plastic Welding system.Therefore, the present embodiment
Traditional Ultrasonic Plastic Welding systematic difference scope is expanded, production cost is reduced, traditional ultrasonic wave modeling is improve
Expect the operating efficiency of welding system.
Embodiment 2：
The difference of the present embodiment and embodiment 1, is metal ring soldering tip 4.
The present embodiment is the flexural vibration mode that curved vibratory transducer is indulged by rationally design dish-type so that large scale ultrasound
Ripple plastics boxing system can simultaneously drive multiple large scale Ultrasonic Plastic annular soldering tips, so as to improve the work of vibrational system
Efficiency.
To ensure the efficient stable work of vibrational system, each annular soldering tip must be positioned at dish type and indulge curved vibratory converter
At 3 flexural vibrations displacement wave amplitude.
Reference picture 2, the annular soldering tip of the present embodiment includes large scale metal ring soldering tip I 401 and large scale metal ring
Soldering tip II 402, the external diameter of the internal diameter more than large scale metal ring soldering tip II 402 of large scale metal ring soldering tip I 401, and
Large scale metal ring soldering tip I 401 and large scale metal ring soldering tip II 402 are respectively positioned on dish type and indulge the curved of curved vibratory converter 3
At bent vibration displacement wave amplitude.
It should be noted that annular soldering tip of the invention is not limited in two, according to actual conditions, using prior art
In formula carry out detailed calculating, the distribution situation of annular soldering tip can be determined.
The present embodiment is improve whole by the fixed multiple metal ring soldering tip in large scale Ultrasonic Plastic boxing system
The operating efficiency of individual boxing system.
Embodiment 3：
It is below 20 KHzs with working frequency, with computing formula of the prior art and every ginseng of accurate Knowing material
Number, setting sandwich piezoelectric ceramic transducer 10, ultrasonic variable amplitude bar 2 are the ultrasonic vibrator of half-wavelength, design placing
Shape indulges curved vibratory converter and the parameter of metal ring soldering tip is as follows：
1. when the material that dish type indulges curved vibratory converter is aluminium alloy, when the material of metal ring soldering tip is aluminium alloy：
Dish type indulges radius R=0.084 meters of curved vibratory converter, and thickness is T=0.015 meters；
External diameter R1=0.084 meters of metal ring soldering tip, internal diameter R2=0.0756 meters, be highly H=0.12 meters.
2. when the material that dish type indulges curved vibratory converter is stainless steel, when the material of metal ring soldering tip is aluminium alloy：
Dish type indulges radius R=0.085 meters of curved vibratory converter, and thickness is T=0.0152 meters；
External diameter R1=0.085 meters of metal ring soldering tip, internal diameter R2=0.0765 meters, be highly H=0.12 meters.
3. when the material that dish type indulges curved vibratory converter is titanium alloy, when the material of metal ring soldering tip is aluminium alloy：
Dish type indulges radius R=0.083 meters of curved vibratory converter, and thickness is T=0.0147 meters；
External diameter R1=0.083 meters of metal ring soldering tip, internal diameter R2=0.0747 meters, be highly H=0.12 meters.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
Specific implementation of the invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should be all considered as belonging to of the invention
Protection domain.
Claims (10)
1. a kind of ultrasonic activation mode conversion method, using the mode of oscillation phase of extensional vibration-flexural vibrations-extensional vibration
Mutual transfer principle, comprises the following steps：
Step one, the ultrasonic wave that the ultrasonic wave of longitudinal vibration mode is converted to flexural vibration mode；
Step 2, by metal ring soldering tip（4）It is fixed on dish type and indulges curved vibratory converter（3）The vibration wave amplitude of flexural vibration mode
Position, makes the metal ring soldering tip（4）Work in longitudinal vibration mode.
2. ultrasonic activation mode conversion method according to claim 1, it is characterised in that：The step one is by disk
Shape indulges curved vibratory converter（3）With ultrasonic variable amplitude bar（2）Connection, by transducer（1）And ultrasonic variable amplitude bar（2）Produce
The ultrasonic wave of longitudinal vibration mode is converted to the ultrasonic wave of flexural vibration mode.
3. ultrasonic activation mode conversion method according to claim 2, it is characterised in that the transducer（1）, it is described
Ultrasonic variable amplitude bar（2）, the dish type indulge curved vibratory converter（3）And the metal ring soldering tip（4）It is in resonance state.
4. a kind of large scale Ultrasonic Plastic boxing system, including the transducer for converting electrical energy into mechanical oscillation（1）, for converging
The ultrasonic variable amplitude bar of poly- ultrasonic wave（2）And metal ring soldering tip（4）, the ultrasonic variable amplitude bar（2）Ultrasonic wave input
With the transducer（1）Ultrasonic wave output terminal be fixedly connected, it is characterised in that：Also include being used to that the ultrasonic wave will be received from
Ultrasonic transformer（2）Longitudinal mode ultrasonic wave be converted to the dish type of flexural vibration mode ultrasonic wave and indulge curved vibratory converter（3）；
The ultrasonic variable amplitude bar（2）Ultrasonic wave output terminal be fixedly connected the dish type and indulge curved vibratory converter（3）, the gold
Category annulus soldering tip（4）May be detachably retained at the dish type and indulge curved vibratory converter（3）On, the vertical bending vibration of the dish type is moved
Converter（3）It is placed in the ultrasonic variable amplitude bar（2）With the metal ring soldering tip（4）Between.
5. large scale Ultrasonic Plastic boxing system according to claim 4, it is characterised in that the vertical bending vibration of the dish type is moved
Converter（3）Thickness less than its diameter 1/10th.
6. large scale Ultrasonic Plastic boxing system according to claim 4, it is characterised in that the ultrasonic variable amplitude bar
（2）Curved vibratory converter is indulged with the dish type（3）The size of contact surface indulges curved vibratory converter less than the dish type（3）Bending is shaken
/ 10th of dynamic wavelength.
7. the large scale Ultrasonic Plastic boxing system according to claim any one of 4-6, it is characterised in that the metal
Annulus soldering tip（4）Curved vibratory converter is indulged positioned at the dish type（3）Flexural vibrations displacement wave amplitude at, and the metal ring
Soldering tip（4）Radial thickness indulge curved vibratory converter less than the dish type（3）/ 10th of flexural vibrations wavelength.
8. the large scale Ultrasonic Plastic boxing system according to claim any one of 4-6, it is characterised in that the metal
Annulus soldering tip（4）Outer wall be provided with multiple grooves, the groove and metal ring soldering tip（4）Inner chamber communicate.
9. the large scale Ultrasonic Plastic boxing system according to claim any one of 4-6, it is characterised in that the transducing
Device（1）, ultrasonic variable amplitude bar（2）And metal ring soldering tip（4）Curved vibratory converter is indulged perpendicular to the dish type（3）Set.
10. the large scale Ultrasonic Plastic boxing system according to claim any one of 4-6, it is characterised in that described to change
Can device（1）, ultrasonic variable amplitude bar（2）, dish type indulge curved vibratory converter（3）And metal ring soldering tip（4）Each self-resonant frequency
Vibration frequency with ultrasonic wave annular plastics welding system is identical.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193613.7A CN106827554B (en) | 2016-12-21 | 2016-12-21 | A kind of large scale Ultrasonic Plastic boxing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193613.7A CN106827554B (en) | 2016-12-21 | 2016-12-21 | A kind of large scale Ultrasonic Plastic boxing system |
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| CN106827554B CN106827554B (en) | 2019-01-01 |
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| CN107825717A (en) * | 2017-11-21 | 2018-03-23 | 成都荡星星进出口贸易有限公司 | Packaging bag production drift and abnormity packaging bag production device |
| CN107901327A (en) * | 2017-12-22 | 2018-04-13 | 上海英汇科技发展有限公司 | A kind of vehicle window frame panel welding method |
| CN109499829A (en) * | 2018-12-31 | 2019-03-22 | 陕西师范大学 | Ultrasonic vibration system and its radial vibration suppressing method based on phonon crystal slot |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107825717A (en) * | 2017-11-21 | 2018-03-23 | 成都荡星星进出口贸易有限公司 | Packaging bag production drift and abnormity packaging bag production device |
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| CN109499829B (en) * | 2018-12-31 | 2021-03-05 | 陕西师范大学 | Ultrasonic vibration system based on phononic crystal groove and radial vibration suppression method thereof |
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