Ultrasonic composite vibration converter

Abstract

Disclosed is an ultrasonic composite vibration converter capable of more efficiently converting vibration energy generated from a transducer having an ultrasonic vibrator into ultrasonic composite vibration in a booster. The ultrasonic complex vibration converter of the present invention comprises: a booster; a ring coupled to the circumference of the booster at an inclined angle from a vertical tangential direction; and a transducer coupled to the ring. Longitudinal vibration generated by the transducer is converted into a rotational and longitudinal vibration force through the booster.

Description

Ultrasonic composite vibration transducer

[0001] The present invention relates to an ultrasonic composite vibration converter, and more particularly, to an ultrasonic composite vibration converter capable of more efficiently converting vibration energy generated from a transducer having an ultrasonic vibrator into ultrasonic composite vibration by a booster.

[0002]

[0003] In general, ultrasonic welding machines use vibration energy generated by a piezoelectric element to generate frictional heat on the bonding surfaces of the materials to be welded, thereby welding them. This type of ultrasonic welding machine can effectively weld dissimilar metals or non-metals, and is widely used in welding work that can be welded by frictional heat, such as welding separately made plastic molded products and welding wires and terminals.

[0004] The principle of ultrasonic welding is that two parts to be welded maintain a certain pressure, and the oxide film at the welded area is removed by frictional heat generated by ultrasonic vibration, and the welded parts are welded by the fusion of metallic bonds between the molecules of the materials as they melt and diffuse with each other.

[0005] Ultrasonic welding is capable of welding dissimilar metals, enables high-precision welding that is not possible with melting methods, and is superior to other welding methods in terms of electrical properties, welding strength, lifespan, and corrosion resistance.

[0006] Ultrasonic welding methods include linear welding mode, torsional (vertical) welding mode, and torsional (horizontal) welding mode depending on the vibration mode.

[0007] Among these ultrasonic welding methods, the torsional welding mode is used for joining the positive terminal and positive collector plate of a cylindrical secondary battery because it minimizes vibration and reduces the generation of foreign substances.

[0008] Currently, various ultrasonic welding methods are disclosed in international patent applications such as PCT / EP2007 / 063350 and PCT / EP2017 / 056637 of TELSONIC, and in China, various torsional ultrasonic vibration transducers are being developed in China, such as Chinese patents CN 202210201866.3 and CN202310252797.3.

[0009] The applicant has filed a patent application for a "torsional ultrasonic vibration converter" under Republic of Korea Patent Application No. 10-2004-0048839, which includes a cylindrical booster, two or three rings that are vertically connected at equal intervals around the booster and have a connecting hole in the center, two or three transducers that are connected with their upper surfaces in contact with one side of the rings and have screw grooves formed in the center of the upper surfaces, and a bolt that penetrates the rings and screws into the screw grooves of the transducers to integrally connect the transducers and the rings.

[0010] This invention can convert the linear vibration of a transducer into torsional vibration in a booster. However, this invention has the disadvantage that although torsional vibration is generated in the rotational direction, there is no moment of force in the longitudinal direction, so a separate force must be applied in the longitudinal direction to promote fusion.

[0011]

[0012] The present invention has been conceived in consideration of the above-described problems, and its purpose is to provide an ultrasonic composite vibration converter capable of simultaneously transmitting vibration energy generated from a transducer having an ultrasonic vibrator to a booster in the rotational direction and longitudinal vibration force.

[0013] In addition, the present invention provides an ultrasonic composite vibration converter that can efficiently capture and easily remove foreign substances generated by ultrasonic fusion.

[0014] In addition, an ultrasonic composite vibration converter is provided having a hole in the center through which air can pass so as to discharge impurities generated during the fusion process to the outside or to maintain the temperature of the tool horn at a constant level.

[0015]

[0016] The ultrasonic composite vibration converter of the present invention for solving the above problem includes a booster, a ring coupled at an angle inclined from the periphery of the booster and a vertical tangent direction, and a transducer coupled to the ring, and longitudinal vibration generated from the transducer is converted into a force of rotational direction and longitudinal vibration through the booster.

[0017] In the present invention, the ring is coupled to be in contact with the booster.

[0018] In the present invention, the ring is coupled so as to be spaced apart from the booster.

[0019] In the present invention, the transducer includes a longitudinal vibration horn, and a plurality of vibration conversion slots are formed on the outer diameter of the longitudinal vibration horn of the transducer, which extend long at an inclined angle in the longitudinal direction.

[0020] In the present invention, there are a plurality of rings and transducers, and the number of rings is the same as the number of transducers.

[0021] In the present invention, a tool horn coupled to the lower part of the booster is further included.

[0022] In the present invention, the booster has a cylindrical body, and the inside of the cylindrical body is provided with a body hole that is perforated upward and downward.

[0023] In the present invention, a supporter for supporting a supporter on which an ultrasonic composite vibration welding machine is installed is coupled to a cylindrical body of the booster, and the upper outer diameter of the supporter is larger than the lower outer diameter of the supporter.

[0024] In the present invention, the booster has a body hole that is perforated vertically in the center, the tool horn has a tool hole that is perforated vertically in the center, and the tool hole of the tool horn is connected to the body hole of the booster.

[0025] In the present invention, a fusion tip is formed at the end of the tool horn, and a hole communicating with the tool hole is formed at the center of the fusion tip.

[0026]

[0027] According to the present invention having the configuration described above, longitudinal vibration generated from a transducer can be simultaneously converted into rotational and longitudinal vibration power through a booster and transmitted to a material to be fused.

[0028] In addition, a torsional ultrasonic vibration converter and a hole through which air can pass in the center of the tool horn are provided to efficiently capture and easily remove foreign substances generated by ultrasonic welding. Furthermore, in order to prevent the welding performance from deteriorating due to heat generation of the tool horn during long-term repetitive welding, the temperature is maintained constant through the center hole, thereby maintaining the welding strength and performance at a constant level.

[0029]

[0030] FIG. 1 is a perspective view showing an ultrasonic composite vibration transducer according to a first embodiment of the present invention.

[0031] FIG. 2 is a perspective view showing a booster of an ultrasonic composite vibration converter according to a first embodiment of the present invention.

[0032] Fig. 3 is a cross-sectional view showing a booster of an ultrasonic composite vibration converter according to the first embodiment of the present invention.

[0033] FIG. 4 is a perspective view showing a transducer of an ultrasonic composite vibration converter according to a first embodiment of the present invention.

[0034] FIG. 5 is a perspective view showing the coupling between the transducer and the booster of the present invention according to the first embodiment of the present invention.

[0035] Fig. 6 is a perspective view showing a torsional ultrasonic fusion machine using an ultrasonic composite vibration converter according to the first embodiment of the present invention.

[0036] Fig. 7 is a cross-sectional view showing a torsional ultrasonic bonding machine using an ultrasonic composite vibration converter according to the first embodiment of the present invention.

[0037] Fig. 8 is a simulation of the transmission of composite vibration of an ultrasonic composite vibration converter according to the first embodiment of the present invention.

[0038] Fig. 9 is a perspective view showing an ultrasonic composite vibration transducer according to a second embodiment of the present invention.

[0039] FIG. 10 is a drawing showing an example of use of an ultrasonic composite vibration bonding machine according to one embodiment of the present invention.

[0040] Fig. 11 is a drawing showing the shape of an impression of a fused material according to one embodiment of the present invention.

[0041] Fig. 12 is a perspective view showing a booster of an ultrasonic composite vibration converter according to a third embodiment of the present invention.

[0042]

[0043] Hereinafter, an ultrasonic composite vibration transducer according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0044] FIG. 1 is a perspective view showing an ultrasonic composite vibration transducer according to a first embodiment of the present invention.

[0045] Referring to FIG. 1, an ultrasonic composite vibration transducer (100) includes a booster (110), a ring (120) coupled at an angle (a) inclined from the periphery of the booster (110) to a vertical tangent direction, and a transducer (130) coupled to the ring, and longitudinal vibration generated from the transducer (130) is converted into a rotational direction and longitudinal vibration force through the booster (110).

[0046] An ultrasonic composite vibration transducer (100) includes a cylindrical booster (110), two rings (120) that are joined at an angle inclined from a vertical tangent direction at equal intervals around the booster (110) and have a joining hole in the center, two transducers (130) whose upper surfaces are in contact with one side of the ring (120) and whose upper surfaces are joined and have a screw groove formed inside the center of the upper surface, and a bolt (140) that penetrates the ring (120) and screws into the screw groove of the transducer (130) to integrally join the transducer (130) and the ring (120).

[0047] FIG. 2 is a perspective view showing a booster of an ultrasonic composite vibration converter according to a first embodiment of the present invention, and FIG. 3 is a cross-sectional view.

[0048] Referring to FIGS. 2 and 3, the booster (110) has a cylindrical body (111), and a support (112) is coupled to the middle portion of the cylindrical body (111) to support a supporter (not shown) on which an ultrasonic composite vibration transducer is installed. The cylindrical body (111) is provided with a body hole (113) that is perforated vertically, and a fastening groove (114) for coupling with a tool horn is formed at the bottom of the body (111).

[0049] The outer diameter of the upper portion of the above cylindrical body (111) is formed to be larger than the outer diameter of the lower portion of the above support (112), thereby enabling the ultrasonic composite vibration transmitted to the lower portion of the booster (110) to be transmitted more precisely.

[0050] On the upper part of the cylindrical body (111), two rings (120) are closely connected in opposite directions at an angle (a) inclined from the vertical tangent direction. The rings (120) are connected to the body (111) by a connecting portion (124). The rings (120) are connected so as to be spaced apart from the booster (110) by the connecting portion (124).

[0051] The present invention is to convert longitudinal vibration generated from a transducer (130) coupled to the ring (120) into rotational and longitudinal vibration power simultaneously through a booster (110) by closely coupling two rings (120) at an angle (a) inclined from the vertical tangent direction to a cylindrical body (111). The inclined angle (a) can be formed at 10 to 45 degrees. As the inclined angle (a) increases, the longitudinal displacement can increase. As the inclined angle (a) decreases, the longitudinal displacement can also decrease. The inclined angle (a) can be adjusted and used depending on the purpose (welding, cutting, etc.), material, and direction of use.

[0052] The above ring (120) is a ring shape having a centrally open joint hole (121), and both ends are flat, with one flat surface being a vibration receiving surface (122) that the vibration horn of the transducer (130) makes contact with, and the other flat surface being a bolt coupling surface (123) that the head of the bolt (140) makes contact with. The vibration receiving surface (122) and the bolt coupling surface (123) are not predetermined, but can be changed depending on the coupling direction of the transducer (130).

[0053] Here, when the vibration is transmitted from the booster (110) in a downward direction, the transducer (130) is positioned at an angle upward as shown in Fig. 1, so that the vibration receiving surface (122) is the upper surface of the ring (120), and the bolt joint surface (123) is the lower surface of the ring (120).

[0054] On the other hand, when the vibration is transmitted from the booster (110) in an upward direction, the transducer (130) is positioned downwardly and inclined, contrary to Fig. 1, so that the vibration receiving surface (122) is the lower surface of the ring (120), and the bolt joint surface (123) is the upper surface of the ring (120).

[0055] FIG. 4 is a perspective view showing a transducer of an ultrasonic composite vibration converter according to a first embodiment of the present invention.

[0056] Referring to FIG. 4, the transducer (130) transmits ultrasonic vibrations, and includes a transmission body (133) having a vibrator, and a cylindrical longitudinal vibration horn (135) having an outer diameter smaller than the outer diameter of the transmission body (133) is formed at the center of one end of the transmission body (133).

[0057] The upper surface of the longitudinal vibration horn (135) is a plane with a screw groove (131) formed inside, and this plane becomes a vibration transmission surface (132) that comes into contact with the vibration receiving surface (122) of the ring (120).

[0058] The above transducer (130) includes a longitudinal vibration horn (135), and a plurality of vibration conversion slots are formed on the outer diameter of the longitudinal vibration horn (135) of the transducer (130) and extend long at an inclined angle (B) in the longitudinal direction.

[0059] Since the ring (120) to which the transducer (130) of the present invention is coupled is coupled at an angle (a) inclined to the tangent to the circumference of the booster (110), the transducer (130) is also coupled at an angle to the booster (110) as a result. In addition, a plurality of vibration conversion slots (137) are formed on the outer diameter of the longitudinal vibration horn (135) of the transducer of the present invention, which extend in the longitudinal direction of the longitudinal vibration horn (135) at an angle (B). The inclined angle (B) can be formed at 10 to 45 degrees.

[0060] Through such an inclined angle (a, B), longitudinal vibration generated from the transducer (130) can be simultaneously converted into rotational and longitudinal vibration power and transmitted through the booster (110).

[0061] The above ring (120) and the above transducer (130) correspond to a plurality of rings, and the number of rings (120) is the same as the number of transducers (130).

[0062] FIG. 5 is a perspective view showing the coupling between the transducer and the booster of the present invention according to the first embodiment of the present invention.

[0063] Referring to FIGS. 1 and 5, when the vibration transmitting surface (132) of the longitudinal vibration horn (135) and the vibration receiving surface (122) of the ring (120) coupled at an angle (a) inclined to the vertical tangent to the circumference of the booster (110) are in close contact with each other, a bolt (140) is fastened to the screw groove (131) of the longitudinal vibration horn (135) while the screw portion passes through the coupling hole (121) of the ring (120). At this time, the head of the bolt (140) comes into contact with the bolt coupling surface (123) of the ring (120).

[0064] In the present invention, the vibration transmission surface (132) and the vibration reception surface (122) are joined to each other with a surface, the screw groove (131) of the transducer (130) and the joining hole (121) of the ring (120) are filled with the threaded portion of the bolt (140), the ring (120) on which the vibration reception surface (122) is formed is closely attached to the circumference of the booster (110) at an inclined angle (a) to the tangent line, and a plurality of vibration conversion slots (137) are formed on the outer diameter of the longitudinal vibration horn (135) of the transducer (130) so as to extend in a longitudinal direction of the longitudinal vibration horn (135) at an inclined angle (B), so that the vibration transmission efficiency is excellent.

[0065] Furthermore, referring back to FIG. 1, what is coupled to the bolt joint surface (123) of the ring (120) is the head of the bolt (140) which has a very short width, and the outer diameter of the longitudinal vibration horn (135) of the transducer (130) is formed smaller than the outer diameter of the transducer (130) transmission body (133), so that the transducers (130) can be configured at equal intervals in a limited space.

[0066] FIG. 6 is a perspective view showing a torsional ultrasonic bonding machine using an ultrasonic composite vibration converter according to the first embodiment of the present invention, and FIG. 7 is a cross-sectional view.

[0067] Referring to FIGS. 6 and 7, an ultrasonic composite vibration welding machine (400) using a torsional ultrasonic vibration transducer (100) includes a tool horn (150) that is screw-coupled to the lower part of a booster (110).

[0068] In a structure such as the present invention, when each transducer (130) operates, it performs linear vibration (L) in the forward and reverse directions simultaneously, and the linear vibration (L) is converted into a force in the rotational direction (T) and longitudinal vibration (P) in the booster (110). By the force in the rotational direction (T) and longitudinal vibration (P), frictional heat is generated at the joint surface of the welded material (W) located at the lower anvil (AV) of the tool horn (150) connected to the booster (110), so that the welded materials (W) can be fused to each other.

[0069] Referring to Fig. 7, a booster (110) having a central body hole (113) that is perforated vertically is connected to a tool horn (150) directly through a fastening groove (114) or through a fastening component (160) in which a perforation is formed as shown in the drawing.

[0070] A fusion tip (151) is formed at the end of the tool horn (150), and the central portion of the tool horn (150) is penetrated upward and downward to form a tool hole (153). Unlike the drawing, the tool horn (150) and the fusion tip (151) may be formed integrally.

[0071] The tool hole (153) of the above tool horn (150) is connected to the body hole (113) of the booster (110) so that impurities generated during the fusion process can be discharged to the outside. Furthermore, the temperature of the tool horn can be maintained at a constant level through the body hole (113) and the tool hole (153), thereby maintaining the fusion strength and performance at a constant level.

[0072] Fig. 8 is a simulation of the composite vibration transmission of an ultrasonic composite vibration converter according to the first embodiment of the present invention.

[0073] Referring to Fig. 8, a transducer (130) having a vibrator such as a piezoelectric element has a natural frequency in an assembled form and has a unique shape that moves while generating displacement when voltage is applied to the piezoelectric element. The desired resonant frequency and natural frequency can be obtained depending on the mechanical properties and shape of the material.

[0074] Again, the ultrasonic composite vibration transducer is structured to transmit power in the rotational direction and longitudinal vibration simultaneously by having a transducer (130) assembled at an angle (a) inclined to the vertical tangent around the booster (110) and having a vibration conversion slot (137) formed at an angle (B) inclined to the longitudinal direction of the longitudinal vibration horn (135).

[0075] Fig. 9 is a perspective view showing an ultrasonic composite vibration transducer according to a second embodiment of the present invention.

[0076] Referring to FIG. 9, an ultrasonic composite vibration transducer (200) includes a cylindrical booster (210), three rings (220) that are joined at an angle inclined from a vertical tangent direction at equal intervals around the booster (210) and have a joining hole in the center, three transducers (230) that are joined while their upper surfaces are in contact with one side of the ring (220) and have a screw groove formed inside the center of the upper surface, and a bolt (240) that penetrates the ring (220) and screw-joins with the screw groove of the transducer (230) to integrally join the transducer (230) and the ring (220).

[0077] The second embodiment has three symmetrical transducers, whereas the first embodiment has two. Since the operation of the second embodiment is identical to that of the first embodiment, a description thereof is omitted.

[0078] The present invention can be used for ultrasonic welding in various fields, and in particular, it can be used for welding a positive plate and a disk of a jelly roll type secondary battery by forming the welding tip of the tool horn thin and long.

[0079] FIG. 10 is a drawing showing an example of use of an ultrasonic fusion device according to one embodiment of the present invention.

[0080] Referring to Fig. 10, it is shown that the welding tip (151) of the ultrasonic composite vibration welding machine can ultrasonically weld the positive electrode plate and the disk, which are the welding objects, by penetrating the central penetration part of the jelly roll type electrode assembly (300).

[0081] At this time, impurities such as particles may be generated around the fusion joint, which may cause poor fusion. The present invention provides a body hole (113) and a tool hole (153) at the center of the booster (110) and the tool horn (150), respectively, to discharge such impurities to the outside, thereby reducing poor fusion. (See Fig. 7)

[0082] In addition, the end of the fusion tip (151) where fusion of the present invention is performed has a grid shape, so that the material to be fused can be fused more efficiently.

[0083] Fig. 11 is a drawing showing the shape of an impression of a fused material according to one embodiment of the present invention.

[0084] Referring to Fig. 11, the upper fusion material has a grid pattern due to the grid-shaped fusion tip, and the center has a circular indentation shape due to the hole formed at the end of the fusion tip.

[0085] Fig. 12 is a perspective view showing a booster of an ultrasonic composite vibration converter according to a third embodiment. Two rings (120) are closely coupled to the upper portion of the cylindrical body (111) at an angle (a) inclined from the vertical tangent direction in opposite directions. The rings (120) are coupled so as to be in contact with the booster (110). The rings (120) are directly connected to the body (111).

[0086] The present invention is to ensure that two rings (120) are closely coupled to a cylindrical body (111) at an angle (a) inclined from the vertical tangent direction, so that longitudinal vibration generated from a transducer (130) coupled to the rings (120) is simultaneously converted into rotational and longitudinal vibration power through a booster (110).

[0087] The present invention described above is not limited to the above-described drawings and detailed description, and it is to be understood that various modifications and changes made by those skilled in the art within the scope of the invention as set forth in the claims below are also included within the scope of the invention.

Claims

1. Booster; A ring that is joined at an angle inclined from the perimeter of the booster and the vertical tangent direction, and A transducer coupled to the above ring Including, An ultrasonic composite vibration converter in which longitudinal vibration generated from the above transducer is converted into rotational and longitudinal vibration power through the above booster.

2. In paragraph 1, An ultrasonic composite vibration transducer, wherein the above ring is coupled to be in contact with the above booster.

3. In paragraph 1, An ultrasonic composite vibration transducer, wherein the above ring is coupled to be spaced apart from the above booster.

4. In paragraph 1, The above transducer comprises a longitudinal vibration horn, An ultrasonic composite vibration transducer, wherein a plurality of vibration conversion slots extending at an inclined angle in the longitudinal direction are formed on the outer diameter of the longitudinal vibration horn of the above transducer.

5. In paragraph 1, The above ring and the above transducer correspond to a plurality of numbers, An ultrasonic composite vibration transducer, wherein the number of the above rings is the same as the number of the above transducers.

6. In paragraph 1, Tool horn that is attached to the lower part of the above booster An ultrasonic composite vibration transducer further comprising:

7. In paragraph 6, The above booster has a cylindrical body, An ultrasonic composite vibration transducer having a body hole formed vertically and horizontally inside the cylindrical body.

8. In paragraph 7, A supporter is attached to the cylindrical body of the above booster to support the supporter on which the ultrasonic composite vibration welder is installed. An ultrasonic composite vibration transducer, wherein the upper outer diameter of the support is larger than the lower outer diameter of the support.

9. In paragraph 8, The center of the above booster has a body hole that is perforated vertically, The center of the above tool horn has a tool hole that is perforated vertically. The tool hole of the above tool horn is connected to the body hole of the booster, which is an ultrasonic composite vibration transducer.

10. In paragraph 9, A fusion tip is formed at the end of the above tool horn, An ultrasonic composite vibration transducer in which a hole communicating with a tool hole is formed in the center of the above-mentioned fusion tip.

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