CN111672730A - Transducer, assembling method thereof and ultrasonic welding device - Google Patents
Transducer, assembling method thereof and ultrasonic welding device Download PDFInfo
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- CN111672730A CN111672730A CN202010422040.0A CN202010422040A CN111672730A CN 111672730 A CN111672730 A CN 111672730A CN 202010422040 A CN202010422040 A CN 202010422040A CN 111672730 A CN111672730 A CN 111672730A
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- 238000003466 welding Methods 0.000 title claims abstract description 40
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Classifications
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- 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
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
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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
Abstract
The invention relates to the technical field of ultrasonic processing equipment, and discloses a transducer, an assembling method thereof and an ultrasonic welding device, wherein the transducer comprises: a front cover plate; the front end of the screw is connected with the front cover plate; the piezoelectric vibrator is sleeved outside the screw rod and is positioned at the rear end of the front cover plate; the rear cover plate is sleeved outside the screw rod and is positioned at the rear end of the piezoelectric vibrator; the piezoelectric vibrator is pressed between the front cover plate and the rear cover plate, and a Teflon insulating sleeve is arranged at the position, corresponding to the piezoelectric vibrator, of the periphery of the screw rod, so that the screw rod and the piezoelectric vibrator are insulated. The invention has the beneficial effects that: the piezoelectric vibrator and the screw are effectively ensured to be insulated from each other, so that electric leakage caused by high-voltage breakdown is prevented, and the sparking probability between electrode plates is reduced.
Description
Technical Field
The invention relates to the technical field of ultrasonic processing equipment, in particular to a transducer, an assembling method thereof and an ultrasonic welding device comprising the transducer.
Background
The ultrasonic welding system is suitable for welding procedures of welding full-plastic nose bridge strips of masks and medical protective clothing, welding after folding edges, welding breather valves, multi-layer roll welding, welding ear bands and the like, and is also suitable for welding procedures of paper diapers, packaging bags or metal materials. The ultrasonic welding system comprises an ultrasonic generator, a transducer, an amplitude transformer and a welding head, and the general working principle is as follows: ultrasonic generator turns into the high frequency alternating current with the low frequency alternating current, turn into high-frequency vibration's mechanical energy with the electric energy through the transducer, the soldered connection produces the high-frequency vibration of several tens of thousands of times per second when acting on thermoplastic's contact surface, high-frequency vibration conveys ultrasonic energy to the weld zone through last weldment, this regional last weldment and lower weldment produce the friction, produce local high temperature, after the ultrasonic action, pressure lasts for a few seconds, make it solidify the shaping, form firm molecular chain, realize ultrasonic bonding. When the ultrasonic welding system is used for welding and processing the mask, the paper diaper, the packaging bag or the metal material, a solvent, an adhesive or other auxiliary substances are not needed, the safety and the environmental protection are realized, the pollution is avoided, the traditional manual welding is replaced, the production efficiency can be improved, and the cost can be effectively reduced.
The transducer generally comprises a screw rod and a piezoelectric vibrator sleeved outside the screw rod, and in order to keep the piezoelectric vibrator and the screw rod insulated from each other, a heat-shrinkable tube is sleeved between the screw rod and the piezoelectric vibrator in the prior art; when the transducer is adopted, particularly when the transducer is applied to ultrasonic welding, the following problems exist: the transducer can produce high temperature (for example be higher than 90 ℃ of high temperature) at the during operation, high temperature can lead to pyrocondensation insulating tube to continue to contract, and the easy external screw thread outside the screw rod of being worn out in shrink process, make high pressure on the electrode slice can puncture the air and produce electric arc with the screw rod, the transmission for the bonding tool such as rethread amplitude transformer, and produce the electric leakage, the bonding tool directly utilizes ultrasonic high-frequency vibration to weld the gauze mask, the gauze mask that the welding tool of event electric leakage can lead to ultrasonic bonding to process produces quality defect on face guard and earlap or face guard body.
In the transducer, the electrode sheet is used to conduct the positive electrode or the negative electrode of the piezoelectric ceramic. In the prior art, pins on electrode plates are generally level with a plate surface and are flat, when each piezoelectric ceramic and each electrode plate are pressed on a transducer, before wires are welded, the distance between two adjacent electrode plates is reasonable, but after the wires are welded on each electrode plate, solder (for example, tin soldering) is molten and flows along the axial direction of the transducer, so that the distance between two adjacent electrode plates is reduced, and when the transducer works, a high-pressure ignition phenomenon may occur between the adjacent positive electrode plate and the negative electrode plate.
Disclosure of Invention
An object of the present application is to provide a transducer which can prevent an electric leakage phenomenon due to an arc generated between electrode plates of the transducer and a screw rod during a working process, and reduce a firing probability between the electrode plates.
The purpose of the application is realized by the following technical scheme:
a transducer, comprising:
a front cover plate;
the front end of the screw is connected with the front cover plate;
the piezoelectric vibrator is sleeved outside the screw rod and is positioned at the rear end of the front cover plate;
the rear cover plate is sleeved outside the screw rod and is positioned at the rear end of the piezoelectric vibrator;
the piezoelectric vibrator is pressed between the front cover plate and the rear cover plate, and a Teflon insulating sleeve is arranged at the position, corresponding to the piezoelectric vibrator, of the periphery of the screw rod, so that the screw rod and the piezoelectric vibrator are insulated;
the piezoelectric vibrator includes a plurality of piezoelectric ceramics and a plurality of electrode pieces arranged in a stacked configuration, each of the electrode pieces is connected with a wire, and the electrode pieces include:
the electrode plate body is sleeved outside the screw rod; and
the pin is arranged on the outer edge of the electrode plate body and comprises at least one crimping plate, and the crimping plate is limited by bending to form a wire groove;
one end of each wire penetrates through the wire slot and is electrically connected with the electrode plate, and the outer surface of the connecting position of each wire and the electrode plate is coated with insulating glue.
In the transducer, optionally, a length of the teflon insulating sleeve in the axial direction is greater than a length of the piezoelectric vibrator in the axial direction.
In the transducer, optionally, the thickness of the teflon insulating sleeve is 0.5 mm to 1 mm.
In the transducer, optionally, the pin includes at least two crimping plates arranged side by side, and two adjacent crimping plates are bent towards opposite directions; the wire grooves of the crimping plates are correspondingly communicated.
In the transducer, optionally, the part of the wire located in the wire slot is welded to the crimp plate.
An ultrasonic welding device, comprising:
a transducer as claimed in any one of the above;
the rear end of the amplitude transformer is connected with the front end of the front cover plate; and
and the welding head is arranged at the front end of the amplitude transformer.
A method of assembling a transducer, comprising the steps of:
one end of a screw is arranged on the front cover plate;
a Teflon insulating sleeve is sleeved at the position, located at the rear end of the front cover plate, of the periphery of the screw;
the electrode plate comprises an electrode plate body and pins arranged on the outer edge of the electrode plate body, the pins are bent to form at least one crimping plate, and the crimping plate is limited to form a wire groove;
sequentially stacking and sleeving a plurality of piezoelectric ceramics and a plurality of electrode plates limited with wire grooves on the outer part of the screw rod at the position of the Teflon insulating sleeve to construct a piezoelectric vibrator;
sleeving a rear cover plate outside the screw rod and located at the rear end of the piezoelectric vibrator so as to tightly press the piezoelectric vibrator between the front cover plate and the rear cover plate;
and respectively penetrating a lead in the wire slot of each electrode plate to electrically connect the lead with the electrode plate, and coating insulating glue on the outer surface of the joint of the lead and the electrode plate.
In the assembling method of the transducer, optionally, the method further includes the steps of:
and detecting whether the insulation resistance between the screw and the piezoelectric vibrator meets a preset condition.
In the assembly method of the transducer, optionally, the detecting whether the insulation resistance between the screw and the piezoelectric vibrator meets a preset condition includes:
and applying 2000-3000V voltage between the screw and the piezoelectric vibrator, wherein if the insulation resistance between the screw and the piezoelectric vibrator is more than 450M omega, the preset condition is met.
In the assembling method of the transducer, optionally, the method further includes the steps of:
and coating three-proofing paint on the peripheral wall of the piezoelectric vibrator.
In the assembling method of the transducer, optionally, the method further includes the steps of:
and detecting whether the frequency, the impedance and the capacitance of the piezoelectric vibrator meet preset conditions.
In the assembly method of the transducer, optionally, the coating of the conformal coating on the outer circumferential wall of the piezoelectric vibrator specifically includes:
drying the transducer for 20-40 min at 55-65 ℃, and coating the conformal coating on the outer peripheral wall of the piezoelectric vibrator in an environment with humidity lower than 50%.
In the assembling method of the transducer, optionally, the method further includes the steps of:
and welding the part of the wire positioned in the wire slot to the crimping plate.
According to the transducer, the assembling method and the ultrasonic welding device, the Teflon insulating sleeve is arranged between the piezoelectric vibrator and the screw rod, so that the piezoelectric vibrator and the screw rod can be insulated from each other, high voltage generated when the transducer works is prevented from puncturing air and the Teflon insulating sleeve, electric arcs are avoided, and electric leakage is effectively prevented; in addition, the pins of the electrode plates are formed by bending at least one bending plate, and the wire grooves through which wires can pass are limited in the bending plate after the bending plate is bent, so that the fixed distance between two adjacent electrode plates can be kept, and compared with the traditional pure welding connection, the electrode plates are prevented from being reduced due to the fact that the distance between the adjacent electrode plates is reduced when welding flux is melted at high temperature, and the ignition probability between the adjacent electrode plates is effectively reduced.
Drawings
The present application is described in further detail below in connection with preferred and compliant embodiments, but those skilled in the art will appreciate that the figures are drawn for purposes of illustrating the preferred embodiments only, and therefore should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the described objects and may contain exaggerated displays and are not necessarily drawn to scale.
FIG. 1 is a perspective view of one embodiment of a transducer of the present application;
FIG. 2 is a longitudinal cross-sectional view of the embodiment shown in FIG. 1;
FIG. 3 is a schematic structural view of an electrode patch of an embodiment of the transducer of the present application;
FIG. 4 is a partial schematic view of an embodiment of a transducer of the present application in relation to the connection of electrode pads to wires;
FIG. 5 is a perspective view of one embodiment of an ultrasonic welding device of the present application;
FIG. 6 is a schematic flow chart diagram of one embodiment of a method of assembling a transducer of the present application.
In the figure, 10, a transducer; 1. a front cover plate; 2. a screw; 3. a piezoelectric vibrator; 31. piezoelectric ceramics; 32. an electrode sheet; 321. an electrode plate body; 322. a pin; 3221. a curl plate; 3222. a wire slot; 323. a positive electrode plate; 324. a negative electrode plate; 4. a rear cover plate; 5. a Teflon insulating sleeve; 6. a wire; 7. a nut; 20. an amplitude transformer; 30. a horn.
Detailed Description
Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.
First, it should be noted that the "front end" and "back end" referred to herein respectively refer to: the proximal machining end is the "front end" and the distal machining end is the "rear end" during machining, which are relative concepts and can therefore vary depending on the different positions in which they are located and the different conditions of use. These and other orientations, therefore, should not be used in a limiting sense.
It should be noted that the term "comprising" does not exclude other elements or steps and the "a" or "an" does not exclude a plurality.
Furthermore, it should be further noted that any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the figures, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present application not directly mentioned herein.
It will be further understood that the terms "first," "second," and the like, are used herein to describe various information and should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present application.
It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.
In the face of new crown epidemic situation, the invention is improved as follows in order to improve the production quality of the mask and the medical protective equipment.
As shown in fig. 1-4, a first aspect of embodiments of the present invention provides a transducer 10 comprising: front shroud 1, screw rod 2, piezoelectric vibrator 3 and back shroud 4, the front end of screw rod 2 links to each other with front shroud 1, and the outside of screw rod 2 is located and is located the rear end of front shroud 1 to the piezoelectric vibrator 3 cover, and the outside of screw rod 2 is located and is located the rear end of piezoelectric vibrator 3 to the back shroud 4 cover. The piezoelectric vibrator 3 is pressed between the front cover plate 1 and the rear cover plate 4, and a Teflon insulating sleeve 5 is arranged at the position of the periphery of the screw rod 2 relative to the piezoelectric vibrator 3, so that the screw rod 2 and the piezoelectric vibrator 3 are insulated from each other.
Based on the technical scheme, the Teflon insulating sleeve 5 is arranged between the screw rod 2 and the piezoelectric vibrator 3, and the Teflon material has high temperature resistance, mechanical wear resistance and excellent electrical insulating property, so that under the condition that the transducer 10 works and generates high temperature, the piezoelectric vibrator 3 and the screw rod 2 can still be ensured to be insulated from each other, and the piezoelectric vibrator 3 is prevented from puncturing air and the Teflon insulating sleeve 5 during work to cause electric arc leakage of the screw rod 2; when the transducer 10 is applied to an ultrasonic welding device, the welding head can be further prevented from electric leakage, and the production quality of the mask and the medical protective equipment is further improved.
Illustratively, as shown in fig. 2, the rear end of the screw rod 2 in the present embodiment passes through the rear end surface of the rear cover plate 4, and a nut 7 is tightened on the rear end surface of the screw rod 2, and tightening the nut 7 can compress the piezoelectric vibrator 3. Alternatively, the rear end of the screw rod 2 may be configured to be nut-shaped, that is, the screw rod 2 is in a screw structure, and the piezoelectric vibrator 3 can be pressed by directly tightening the rear end of the screw rod 2, which is not specifically shown in the drawings.
In order to further ensure good insulation performance between the piezoelectric vibrators 3 and the screw 2, the length of the Teflon insulating sleeve 5 along the axial direction is greater than that of each piezoelectric vibrator 3 along the axial direction; specifically, the teflon sleeve 5 extends rearward in the axial direction from the rear end face of the front cover plate 1 and extends beyond the total height of the piezoelectric vibrator 3.
Specifically, in the embodiment, the thickness of the teflon insulating sleeve 5 is 0.5 mm to 1 mm, so that the good insulating performance can be ensured, and the mounting is convenient; preferably, the thickness of the teflon insulating sleeve 5 is about 0.75 mm.
Referring back to fig. 1 and 2, the piezoelectric vibrator 3 includes a plurality of piezoelectric ceramics 31 and a plurality of electrode pieces 32 arranged in a stacked configuration, wherein each electrode piece 32 is used to conduct each piezoelectric ceramics 31; each electrode plate 32 is connected with a lead 6 (see fig. 4), the lead 6 is electrically connected with the electrode plate 32, and the outer surface of the connection position of the lead 6 and the electrode plate 32 is coated with an insulating glue (not specifically shown in the drawing) for isolating the lead 6 and the electrode plate 32 from the outside to realize insulation; specifically, the electrode tab 32 that connects the positive electrode surface of the piezoelectric ceramic 31 is the positive electrode tab 323, the electrode tab 32 that connects the negative electrode surface of the piezoelectric ceramic 31 is the negative electrode tab 324, and the insulating adhesive is disposed on the outer surface of the connection position between the lead 6 and the electrode tab 32, so that the sparking probability between the adjacent positive electrode tab 323 and the negative electrode tab 324 can be effectively reduced.
In this embodiment, the polarities of the surfaces of the two adjacent piezoelectric ceramics 31 facing each other are the same, so that the positive electrode surface or the negative electrode surface of the two adjacent piezoelectric ceramics 31 can be electrically connected through one electrode sheet 32. Specifically, the piezoelectric vibrator 3 includes four piezoelectric ceramics 31 and four electrode pieces 32, and the four electrode pieces 32 are, in order from front to back: a positive electrode tab 323, a negative electrode tab 324, a positive electrode tab 323, and a negative electrode tab 324.
In the conventional transducer, a reasonable distance is usually reserved between the two adjacent electrode tabs 32 before the lead wire 6 is connected, but when the lead wire is welded, the distance between the two adjacent electrode tabs 32 is reduced because the solder (e.g., soldering) is melted and then extends in the axial direction by a certain width, so that the probability of sparking between the positive electrode tab 323 and the negative electrode tab 324 is increased.
In order to overcome the technical problem, in the embodiment, referring to fig. 3 and 4, the electrode plate 32 includes an electrode plate body 321 and a pin 322, the electrode plate body 321 is sleeved outside the screw rod 2, the pin 322 is disposed at an outer edge of the electrode plate body 321, the pin 322 includes at least one crimping plate 3221, and the crimping plate 3221 is bent by using a nipper during installation to form a semi-arc shape, so that a wire groove 3222 is reserved between the crimping plates 3221, and one end of a wire 3226 is inserted into the wire groove 3222, which is specifically referred to as shown in fig. 4. Through bending the formation wire casing 3222 with curl plate 3221 to wear to locate wire 6 in wire casing 3222, consequently, the interval between two adjacent electrode pieces 32 is fixed, can not lead to the interval along with subsequent soldering tin process and reduce, can avoid the problem that the interval that leads to after the solder high temperature melting reduces, can effectively guarantee the interval between two adjacent electrode pieces 32, reduce the probability of striking sparks.
Further, in this embodiment, the pin 322 includes at least two curling plates 3221 arranged side by side, in order to make the connection more reliable, two adjacent curling plates 3221 are bent toward opposite directions, and the wire grooves 3222 of the curling plates 3221 are correspondingly communicated; fig. 3 and 4 only show an embodiment in which the pin 322 includes three curling plates 3221, and the curling plates 3221 at two sides are bent toward the inner side, and the curling plate 3222 at the middle is bent toward the outer side.
Note that, each of the curl plates 3221 may be similarly bent in the same direction.
Further, in order to reinforce each wire 6, the portion of the wire 6 located in the wire groove 3222 is welded to the curl plate 3221; because the space that the wire casing formed is less, consequently only need adopt a small amount of solder can, hold in wire casing 3221 after a small amount of solder melts, not only can not lead to the fact because the welding to reduce the interval between adjacent electrode slice 32, the solder is with wire and electrode slice zonulae occludens moreover, can further guarantee the electric conductive property between wire and the electrode slice. The lead wire 6 and the electrode sheet 32 in this embodiment are connected by soldering, for example.
A second aspect of the embodiment of the present invention provides an ultrasonic welding apparatus, as shown in fig. 5 in particular, which includes a horn 20, a horn 30, and the transducer 10 according to any one of the first aspect, wherein the rear end of the horn 20 is connected to the front end of the front cover plate 1, and the horn 30 is mounted to the front end of the horn 20.
The ultrasonic welding apparatus in this embodiment includes the transducer according to any one of the first aspect, so that the ultrasonic welding apparatus has all the advantages of the transducer, which are not described herein again.
A third aspect of the embodiments of the present invention provides a method for assembling a transducer, as shown in fig. 6, including the following steps:
s1, mounting one end of the screw on the front cover plate;
s2, sleeving a Teflon insulating sleeve at the position, located at the rear end of the front cover plate, of the periphery of the screw;
s3, the electrode plate comprises an electrode plate body and pins arranged on the outer edge of the electrode plate body, the pins are bent to form at least one crimping plate, and the crimping plate is limited to form a wire groove;
s4, sequentially stacking and sleeving a plurality of piezoelectric ceramics and a plurality of electrode plates outside the screw rod at the position of the Teflon insulating sleeve to form a piezoelectric vibrator;
s5, sleeving a rear cover plate on the outer portion of the screw rod and locating at the rear end of the piezoelectric vibrator, so that the piezoelectric vibrator is pressed between the front cover plate and the rear cover plate;
and S6, respectively penetrating a lead in the wire slot of each electrode plate to electrically connect the lead with the electrode plate, and coating insulating glue on the outer surface of the joint of the lead and the electrode plate.
Based on the technical scheme, the Teflon insulating sleeve is arranged between the piezoelectric vibrator and the screw rod, so that the piezoelectric vibrator and the screw rod can be well insulated in the working process of the transducer, and electric leakage is prevented; in addition, because the pin with the electrode slice sets to the form of buckling by the curling plate, through wearing to establish the wire in the wire casing that the curling plate is buckled and is injectd formation, realize the electricity between wire and the electrode slice and coating insulating cement at the surface of the junction of wire and electrode slice, it is continuous for traditional pure welding, because the interval between two adjacent electrode slices is fixed, can not lead to the interval along with subsequent soldering tin process and reduce, can avoid the problem that the interval that leads to after the melting of solder high temperature reduces, can effectively reduce the probability of striking sparks.
Further, the method of assembling a transducer in the present embodiment further includes the steps of: and detecting whether the insulation resistance between the screw and the piezoelectric vibrator meets a preset condition.
When the insulation resistance between the screw rod and the piezoelectric vibrator meets the preset condition, the insulation performance of the transducer can be ensured, and electric leakage is effectively prevented.
Specifically, whether the insulation resistance between the screw and the piezoelectric vibrator meets a preset condition is detected by the following method: and applying 2000-3000V voltage between the screw and the piezoelectric vibrator, wherein if the insulation resistance between the screw and the piezoelectric vibrator is more than 450M omega, the preset condition is met. Illustratively, according to the practical working condition of the transducer, when the insulation resistance is detected, 2500V voltage is applied between the screw rod and the piezoelectric vibrator, and if the insulation resistance between the screw rod and the piezoelectric vibrator is greater than 500M omega, the insulation requirement is met.
In addition, in order to reduce the probability of high-pressure sparking when the transducer works in a high-humidity environment, the method further comprises a step S7, wherein in the step S7, a three-proofing paint is coated on the outer peripheral wall of the piezoelectric vibrator, and the three-proofing paint mainly plays a role in isolation.
Specifically, the three-proofing paint is coated by the following method: drying the transducer for 20-40 min at 55-65 ℃, and coating the conformal coating on the outer peripheral wall of the piezoelectric vibrator in an environment with humidity lower than 50%. Illustratively, the transducer is baked at a temperature of 60 ℃ for 30 min.
Further, in order to reinforce each lead, the connecting lead on the electrode plate further comprises: and welding the part of the wire positioned in the wire slot to the crimping plate. Because the space that the wire casing formed is less, consequently only need adopt a small amount of solder can, hold in wire casing 3221 after a small amount of solder melts, not only can not lead to the fact because the welding to reduce the interval between adjacent electrode slice 32, the solder is with wire and electrode slice zonulae occludens moreover, can further guarantee the electric conductive property between wire and the electrode slice. Illustratively, soldering is used to weld the lead wires to the electrode pads.
In summary, in the transducer, the assembling method thereof and the ultrasonic welding apparatus in the embodiment, the teflon insulating sleeve is arranged between the piezoelectric vibrator and the screw rod, so that the piezoelectric vibrator and the screw rod can be ensured to be insulated from each other, and high voltage generated when the transducer works is prevented from puncturing air and the teflon insulating sleeve, thereby avoiding electric arc generation and effectively preventing electric leakage; in addition, because the pin of electrode slice sets to the form of being buckled by the curl plate, through wearing to establish the wire in the curl plate is buckled and is injectd the wire casing that forms, realizes the electricity between wire and the electrode slice and is connected for traditional pure welding, because the interval between two adjacent electrode slices 32 is fixed, can not lead to the interval along with subsequent soldering tin process and reduce, can avoid the problem that the interval that leads to after the high temperature melting of solder reduces, can effectively reduce the probability of striking sparks.
This written description discloses the application with reference to the drawings, and also enables one skilled in the art to practice the application, including making and using any devices or systems, using suitable materials, and using any incorporated methods. The scope of the present application is defined by the claims and includes other examples that occur to those skilled in the art. Such other examples are to be considered within the scope of the claims as long as they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.
Claims (13)
1. A transducer, comprising:
a front cover plate;
the front end of the screw is connected with the front cover plate;
the piezoelectric vibrator is sleeved outside the screw rod and is positioned at the rear end of the front cover plate;
the rear cover plate is sleeved outside the screw rod and is positioned at the rear end of the piezoelectric vibrator;
the piezoelectric vibrator is pressed between the front cover plate and the rear cover plate, and a Teflon insulating sleeve is arranged at the position, corresponding to the piezoelectric vibrator, of the periphery of the screw rod, so that the screw rod and the piezoelectric vibrator are insulated;
the piezoelectric vibrator includes a plurality of piezoelectric ceramics and a plurality of electrode pieces arranged in a stacked configuration, each of the electrode pieces is connected with a wire, and the electrode pieces include:
the electrode plate body is sleeved outside the screw rod; and
the pin is arranged on the outer edge of the electrode plate body and comprises at least one crimping plate, and the crimping plate is limited by bending to form a wire groove;
one end of each wire penetrates through the wire slot and is electrically connected with the electrode plate, and the outer surface of the connecting position of each wire and the electrode plate is coated with insulating glue.
2. The transducer of claim 1, wherein the length of the teflon insulating sleeve in the axial direction is greater than the length of the piezoelectric vibrator in the axial direction.
3. The transducer of claim 1, wherein the teflon insulating sleeve has a thickness of 0.5 mm to 1 mm.
4. The transducer of claim 1, wherein the pins comprise at least two of the crimping plates arranged side by side, adjacent two of the crimping plates being bent in opposite directions; the wire grooves of the crimping plates are correspondingly communicated.
5. The transducer of any of claims 1-4, wherein the portion of the wire within the wire slot is soldered to the crimp plate.
6. An ultrasonic welding apparatus, comprising:
the transducer of any of claims 1-5;
the rear end of the amplitude transformer is connected with the front end of the front cover plate; and
and the welding head is arranged at the front end of the amplitude transformer.
7. A method of assembling a transducer, comprising the steps of:
one end of a screw is arranged on the front cover plate;
a Teflon insulating sleeve is sleeved at the position, located at the rear end of the front cover plate, of the periphery of the screw;
the electrode plate comprises an electrode plate body and pins arranged on the outer edge of the electrode plate body, the pins are bent to form at least one crimping plate, and the crimping plate is limited to form a wire groove;
sequentially stacking and sleeving a plurality of piezoelectric ceramics and a plurality of electrode plates limited with wire grooves on the outer part of the screw rod at the position of the Teflon insulating sleeve to construct a piezoelectric vibrator;
sleeving a rear cover plate outside the screw rod and located at the rear end of the piezoelectric vibrator so as to tightly press the piezoelectric vibrator between the front cover plate and the rear cover plate;
and respectively penetrating a lead in the wire slot of each electrode plate to electrically connect the lead with the electrode plate, and coating insulating glue on the outer surface of the joint of the lead and the electrode plate.
8. The method of assembling a transducer according to claim 7, further comprising the steps of:
and detecting whether the insulation resistance between the screw and the piezoelectric vibrator meets a preset condition.
9. The method of assembling a transducer according to claim 8, wherein the detecting whether the insulation resistance between the screw and the piezoelectric vibrator satisfies a preset condition includes:
and applying 2000-3000V voltage between the screw and the piezoelectric vibrator, wherein if the insulation resistance between the screw and the piezoelectric vibrator is more than 450M omega, the preset condition is met.
10. The method of assembling a transducer according to claim 7, further comprising the steps of:
and coating three-proofing paint on the peripheral wall of the piezoelectric vibrator.
11. The method of assembling a transducer according to claim 7, further comprising the steps of:
and detecting whether the frequency, the impedance and the capacitance of the piezoelectric vibrator meet preset conditions.
12. The method of assembling a transducer according to claim 10, wherein coating the outer peripheral wall of the piezoelectric vibrator with a three-proofing paint specifically comprises:
drying the transducer for 20-40 min at 55-65 ℃, and coating the conformal coating on the outer peripheral wall of the piezoelectric vibrator in an environment with humidity lower than 50%.
13. The method of assembling a transducer according to any of claims 7-12, further comprising the steps of:
and welding the part of the wire positioned in the wire slot to the crimping plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010422040.0A CN111672730B (en) | 2020-05-18 | 2020-05-18 | Transducer, assembling method thereof and ultrasonic welding device |
| PCT/CN2020/139977 WO2021232795A1 (en) | 2020-05-18 | 2020-12-28 | Transducer and assembling method therefor, and ultrasonic welding device |
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| CN202010422040.0A CN111672730B (en) | 2020-05-18 | 2020-05-18 | Transducer, assembling method thereof and ultrasonic welding device |
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| CN111672730B CN111672730B (en) | 2021-03-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232795A1 (en) * | 2020-05-18 | 2021-11-25 | 汇专科技集团股份有限公司 | Transducer and assembling method therefor, and ultrasonic welding device |
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| EP0749900A1 (en) * | 1995-06-19 | 1996-12-27 | Tetra Laval Holdings & Finance SA | An arrangement in a drive unit for an ultrasound sealing unit |
| CN205199874U (en) * | 2015-12-30 | 2016-05-04 | 玉环震浪超音波震动子有限公司 | Ultrasonic transducer |
| CN207126776U (en) * | 2017-06-01 | 2018-03-23 | 苏州嘉辉超声波科技有限公司 | A kind of ultrasonic transducer |
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| JPH10156286A (en) * | 1996-12-03 | 1998-06-16 | Daishinku Co | Bolt tightening langevin type oscillator and ultrasonic cleaning apparatus |
| JP3655462B2 (en) * | 1998-02-23 | 2005-06-02 | 日本特殊陶業株式会社 | Langevin type ultrasonic transducer |
| CN208261186U (en) * | 2018-05-21 | 2018-12-21 | 广州汇专工具有限公司 | Ultrasonic transducer |
| CN110523606A (en) * | 2019-05-30 | 2019-12-03 | 哈尔滨工业大学（深圳） | The hot ultrasonic transducer of direction vibration and bonding method for microelectronics Packaging |
| CN210449770U (en) * | 2019-06-24 | 2020-05-05 | 佛山市顺德区美的电热电器制造有限公司 | Electrode sheet for ultrasonic vibrator device, and cooking utensil |
| CN111672730B (en) * | 2020-05-18 | 2021-03-05 | 科益展智能装备有限公司 | Transducer, assembling method thereof and ultrasonic welding device |
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- 2020-05-18 CN CN202010422040.0A patent/CN111672730B/en active Active
- 2020-12-28 WO PCT/CN2020/139977 patent/WO2021232795A1/en active Application Filing
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| EP0749900A1 (en) * | 1995-06-19 | 1996-12-27 | Tetra Laval Holdings & Finance SA | An arrangement in a drive unit for an ultrasound sealing unit |
| CN205199874U (en) * | 2015-12-30 | 2016-05-04 | 玉环震浪超音波震动子有限公司 | Ultrasonic transducer |
| CN207126776U (en) * | 2017-06-01 | 2018-03-23 | 苏州嘉辉超声波科技有限公司 | A kind of ultrasonic transducer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021232795A1 (en) * | 2020-05-18 | 2021-11-25 | 汇专科技集团股份有限公司 | Transducer and assembling method therefor, and ultrasonic welding device |
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| CN111672730B (en) | 2021-03-05 |
| WO2021232795A1 (en) | 2021-11-25 |
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