JP7054912B2 - Joining method by ultrasonic vibration or sonic vibration - Google Patents

Description

In the present invention, the shape of the tip that presses the joining object of the joining resonator is devised, and a plurality of thermoplastic synthetic resin films and a plurality of metal foils are alternately placed one above the other by ultrasonic vibration or sonic vibration. The present invention relates to a joining method by ultrasonic vibration or sonic vibration, in which multi-layered portions to be stacked are collectively and conductively joined onto a plate-shaped metal portion.

The metal joint disclosed in Non-Patent Document 1 will be described with reference to FIGS. 5 and 6. In the metal bonding shown in FIG. 5, the bonding target body 52 composed of a plurality of superposed metal members 51 is weighted by the resonator 53 and the anvil 54, and lateral ultrasonic vibration is applied by the resonator 53 to the bonding target body 52. By giving to, friction is generated at the boundary surface between the plurality of overlapped metal members 51, the movement of the metal atom becomes active due to the heating by the friction heat, the movement of the metal atom is generated by the diffusion, and the metal atom is generated. The attractive force generated between the metal atoms binds the metal atoms to each other, and the plurality of overlapped metal members 51 are joined to each other. As shown in FIG. 6, the tip portion 55 for pressing the metal member 51 of the resonator 53 and the tip portion 56 for pressing the metal member 51 of the anvil 54 are gradually thinned in a direction protruding from the side of the resonator 53 or the anvil 54. It is configured as a pyramid-shaped or anvil-shaped pyramid-shaped grip portion, and grips the joining target body 52 shown in FIG.

In recent years, in lithium ion batteries and the like, the thickness of each metal foil has become thinner, and the number of metal foils bonded has tended to increase. When the thickness of the metal foil is thin and the number of sheets to be joined is large in this way, the tip portions 55 and 56, which are the protrusions of the square pyramid shape or the square cone shape, are pierced into the metal foil and the tip portions 55 and the tip portion 55 and 56 are inserted. At 56, corners were formed at the intersecting edges of adjacent surfaces, and the metal leaf may be broken.

It is disclosed in paragraphs [0027] to paragraphs [0030] and FIG. 5 of Patent Document 1 in order to prevent the metal leaf from being broken by the tip portions 55 and 56 having the pyramid-shaped or pyramidal-shaped protrusions. It is conceivable to utilize the invention of joining the metal foil with ultrasonic vibration.

A case where a plurality of metal foils 61 are joined by ultrasonic vibration will be described with reference to FIG. 7 by using the inventions disclosed in paragraphs [0027] to paragraphs [0030] and FIG. 5 of Patent Document 1. As shown in FIG. 7, a plurality of stacked metal foils 61 are sandwiched from above and below by protective members 62 and 63 made of metal plates, and the protective members 62 and 63 are sandwiched between the tip portion 55 of the resonator 53 and the tip of the anvil 54. It is sandwiched between the parts 56 from above and below, and a weight and ultrasonic vibration are applied to the metal foil 61 and the protective members 62 and 63 by the resonator 53, and the tip portions 55 and 56 destroy the protective members 62 and 63 and the metal foil 61. The metal leaf 61 and the protective members 62 and 63 are joined to each other by ultrasonic vibration.

However, the metal joint shown in FIG. 7 is difficult to adopt suddenly because the number of steps for protecting a plurality of stacked metal foils 61 with the protective members 62 and 63 increases.

WO2014 / 81802A

Principle of ultrasonic metal welding (Technical explanation) Cosmo System Co., Ltd., [Search on September 7, 2016, Internet <URL: http://www.cosmo-stm.com/usmetal/a bout-us-metal -welding.html>]]

The present invention has been made in view of the above background technique, and devises the shape of the tip portion for pressing the joining target of the joining resonator, and at least protects the metal foil from the tip portion with a protective member. Instead, a multi-layered portion made by alternately stacking a plurality of thermoplastic synthetic resin films and a plurality of metal foils one above the other by ultrasonic vibration or sonic vibration is collectively and conductively joined onto the plate-shaped metal portion. It is an object of the present invention to provide a joining method by ultrasonic vibration or sonic vibration.

In the present invention, a plurality of protrusions having a front end on the side of a resonator to be joined and having an angular sharp edge on the outer surface are opposed to the tip and a receiving jig provided below the tip. The structure is such that the protrusions on the side of the object to be joined are made smaller than the protrusions on the side of the resonator by stacking them in two or more stages in the direction of the vibration, and a plurality of thermoplastic synthetic resin films and a plurality of sheets are formed. A joining object having a structure in which a multi-layered portion formed by alternately stacking the metal foils of the above and above is stacked on the metal portion is arranged between the tip portion and the receiving jig and pressed from the vertical direction. The tip portion resonates with the sonic vibration or ultrasonic vibration transmitted from the vibrator attached to one end of the resonator and vibrates in the lateral direction orthogonal to the pressurized direction in the joining object. It is characterized in that a plurality of metal foils of a multi-layered portion and a metal portion are collectively and conductively joined.

In the present invention, the tip of the resonator has a plurality of protrusions having an angular sharp edge on the outer surface in a direction opposite to the tip and the receiving jig provided below the tip. Since the protrusions on the side of the object to be joined are smaller than the protrusions on the side of the resonator, in the process of joining the objects to be joined, first, sonic vibration or ultrasonic vibration The energy of is concentrated on the small protrusion on the side of the object to be joined as the first stage to trigger the displacement, and the large protrusion on the side of the resonator as the second stage is on the side of the object to be joined. The part existing around the small-shaped protrusion can be smoothly joined. Therefore, the vibration energy is concentrated on the tip of the resonator, and the joining target portion of the joining target body can be collectively and conductively joined so as to become one mass of metal, and the periphery of the joining target portion of the joining target body. The thermoplastic synthetic resin film in the above does not melt in a wide range. Further, by efficiently concentrating the vibration energy on the tip of the resonator, the free movement of the atom of the metal foil and the atom of the metal part due to the vibration is suppressed, and the metal as a contamination generated from the metal foil and the metal part is suppressed. The generation and diffusion of powder is suppressed. Further, in the present invention, if the root portion of the protrusion on the side of the joining object is a concave arc-shaped surface portion recessed from the outside toward the joining resonator side or the joining receiving jig side, the above-mentioned There are no cracks in the root of the protrusion on the side of the receiving jig for joining, and the finish of the joint is a beautiful shape that reflects the concave arcuate surface of the base of the protrusion on the side of the receiving jig for joining. Can be shown to. Further, in the present invention, the root portion of the protrusion on the side of the joining resonator or the side of the joining receiving jig is recessed from the outside to the side of the joining resonator or the side of the joining receiving jig. If it is a concave arc-shaped surface portion, cracks do not occur in the root portion of the protrusion on the side of the resonator for joining or the side of the receiving jig for joining, and the finish of the joining is the concave arc-shaped surface portion of the root portion. It can be made to look like a beautiful shape that reflects the above.

The joining method according to the embodiment for carrying out the invention is shown, FIG. A is a side view of a state before joining in which the joining object is mounted on a receiving jig, and FIG. In the state of being pressurized from above and below, the tip of the resonator resonates with sonic vibration or ultrasonic vibration and vibrates laterally to collectively join the metal foil of the joining target and the joining target part in the metal part. The schematic diagram of the inside which is joined so as to be conductive, and the figure C is a schematic diagram of the joined inside where the resonator rises and the part to be joined is joined. The front view which showed the joining apparatus which concerns on embodiment for carrying out an invention. The tip of the junction resonator according to the embodiment for carrying out the invention is shown, FIG. A is a bottom view, FIG. B is a sectional view taken along line BB of FIG. A, and FIG. C is a sectional view taken along line CC of FIG. .. The structure of the tip of the junction resonator according to the embodiment of the invention is different from that of FIG. 2, FIG. A is a bottom view, FIG. B is a sectional view taken along line BB of FIG. CC line sectional view. The schematic diagram which showed the metal bonding disclosed in Non-Patent Document 1. The perspective view which showed the protrusion of the anvil pyramid shape as the tip part which presses the joint object of the conventional resonator and anvil. The schematic diagram which showed the metal bonding using the invention disclosed in Patent Document 1.

A joining method according to a mode for carrying out the invention will be described with reference to FIG. In the joining method shown in FIG. 1, as shown in FIG. A of FIG. 1, a space into which the joining target body 41 can be inserted is formed between the tip portion 6 of the resonator 1 and the receiving jig 40, and resonance occurs. The joining object 41 is mounted on the receiving jig 40 in a state where the tip portion 6 of the vessel 1 and the receiving jig 40 face each other in the vertical direction. The joining object 41 mounted on the receiving jig 40 has a multi-layered portion 44 made of a plate-shaped metal in which a plurality of thermoplastic synthetic resin films 42 and a plurality of metal foils 43 are alternately stacked one above the other. It has a structure stacked on the portion 45. When the joining object 41 is mounted on the receiving jig 40, the plate-shaped metal portion 45 in the joining object 41 is in contact with the receiving jig 40. A grip portion 47 composed of a large number of chevron-shaped irregularities is provided on the upper surface of the receiving jig 41 on the side of the joining target body 41, but the upper surface of the receiving jig 41 on the joining target body 41 side is a grip portion 47. It is also applicable to a flat surface without a jig. The thickness of the metal portion 45 is such that the grip portion 47 does not penetrate the metal portion 45 in the vertical direction at the time of joining.

The tip portion 6 is a portion of the resonator 1 located on the side of the joining target body 41 and is pressed against the joining target body 41 at the time of joining, and receives a plurality of protrusions 7 and 8 as the resonator 1. It is configured to be stacked in two stages in the vertical direction as the direction facing the jig 40, and the protrusion 8 on the side of the joining object 41 is smaller than the protrusion 7 on the side of the resonator 1. The protrusions 7 and 8 are formed in a hemispherical shape or a semi-cylindrical shape. The hemispherical or semi-cylindrical shape constituting the protrusions 7 and 8 is a shape having no sharp edge angular on the outer surface.

Since the protrusion 8 on the side of the object to be joined 41 has a smaller shape than the protrusion 7 on the side of the resonator 1, in this specification, the protrusion 7 on the side of the resonator 1 is referred to as the large protrusion 7. It is expressed, and the protrusion 8 on the side of the joining object 41 is expressed as a small protrusion 8. Further, the small protrusion 8 protrudes from the large protrusion 7 toward the joining target 41 so that the small protrusion 8 comes into contact with the joining target 41 before the large protrusion 7 at the time of joining. As a result, the tip portion 6 does not destroy the metal foil 43 at the time of joining. The number of the tip portions 6 including the large protrusions 7 and the small protrusions 8 may be one or a plurality. When there are a plurality of tip portions 6, each tip portion 6 may have a different size or the same size.

Next, as shown in FIG. 1B, as the resonator 1 descends as shown by the arrow 10, the joining target 41, the resonator 1, and the receiving jig 40 come into contact with each other in the vertical direction. The bonding object 41 is pressed from above and below by the tip 6 of the resonator 1 and the receiving jig 40, and the tip 6 of the resonator 1 is transmitted from the vibrator 38. Resonating with vibration or ultrasonic vibration, it vibrates in the lateral direction indicated by the arrow 9, and the joint target portion 46 between the metal foil 43 and the metal portion 45 of the joint target body 41 receives pressure from the tip portion 6 and vibration energy. Receive and join in a batch and make it conductive.

In the step of joining the joining target body 41, the thermoplastic synthetic resin film 42 around the tip portion 6 evaporates due to the pressure and vibration energy from the tip portion 6 of the joining target body 41, and the tip portion 6 is joined. The metal particles of the metal foil 43 and the metal particles of the metal portion 45 around the metal foil 43 are transformed into ingots, and free motion is generated in the atoms of the metal foil 43 and the atoms of the metal portion 45, which are the ingots, and finally the metal foil. The atoms of 43 and the atoms of the metal portion 45 are excited and diffused to form a single mass of metal as the bonding target site 46. That is, the metal foil 43 and the metal portion 45 are joined together and conductively so that the joining target portion 46 becomes one block of metal. At the joining target portion 46, the metal foil 43 and the metal portion 45 penetrate the thermoplastic synthetic resin film 42 in the vertical direction and are joined as a single block of metal, except for the joining target portion 46 around the joining target portion 46. In the portion, the thermoplastic synthetic resin film 42 of the multilayer portion 44 can insulate each metal foil 43 from each other and can insulate the metal foil 43 and the metal portion 45 from each other.

A plurality of protrusions having no sharp edges, which are angular on the outer surface where the tip portion 6 is a large protrusion 7 and a small protrusion 8, are stacked in two or more stages in the opposite directions of the resonator 1 and the receiving jig 40. Since the small protrusion 8 on the side of the object to be joined 41 has a smaller shape than the large protrusion 7 on the side of the resonator 1, in the step of joining the object to be joined 41, first, sonic vibration or super The energy of the sound wave vibration is concentrated on the small protrusion 8 as the first stage to trigger the displacement, and the subsequent large protrusion 7 as the second stage smoothly joins the portion existing around the small protrusion 8. Can be done. Therefore, the vibration energy is concentrated on the tip portion 6, and the joining target portion 46 can be collectively and conductively joined as one lump of metal, and the thermoplastic synthetic resin film 42 around the joining target portion 46 is widely used. Does not dissolve in. Further, by efficiently concentrating the vibration energy on the tip portion 6, the free movement of the atoms of the metal foil 43 and the atoms of the metal portion 45 due to the vibration is suppressed, and as a contamination generated from the metal foil 43 and the metal portion 45. The generation and diffusion of metal powder is suppressed. For joining, it is advantageous to be fixed at a certain frequency in the range of 20 KHz or less, and the above effect is expected when the tabs are bundled and joined when joining the electrodes of a lithium ion battery or the like. can.

After that, as shown in FIG. C of FIG. 1, as the resonator 1 rises, the tip portion 6 separates from the joining target body 41, and the joining target body 41 is left on the receiving jig 40. Then, the joining target body 41 is taken out from the receiving jig 40, and one joining operation with respect to the joining target body 41 is completed.

The joining device 31 used in the joining method according to the embodiment for carrying out the invention will be described with reference to FIG. The resonator 1 used in the joining device 31 shown in FIG. 2 is composed of an aluminum alloy, a titanium alloy, an iron alloy, or the like, depending on the purpose of joining, and has a resonance main portion 2, a support portion 3, and a joining tool portion 4. Be prepared. The surface 5 on the work side of the joining tool portion 4 becomes a surface facing the joining target body 41 at the time of joining, and constitutes a horizontal plane orthogonal to the center line extending in the vertical direction of the joining tool portion 4. A tip portion 6 is provided on the surface 5 on the work side. The number of the tip portions 6 may be one or a plurality with respect to the surface 5 on the work side.

From the outer surface of the resonance main part 2 of the joining tool part 4 to the lower side so as to form the maximum vibration amplitude point where the surface 5 on the work side and the tip part 6 vibrate with the maximum vibration amplitude in the lateral direction indicated by the arrow 9. The protruding dimensions are set. The length from one end to the other end in the lateral direction of the resonance main unit 2 may be at least half a wavelength of the resonance frequency of the ultrasonic vibration or the sound wave vibration transmitted from the vibrator 38, but is one wavelength. An example of the length of. The resonance main unit 2 may have a round bar shape or a square bar shape. The maximum vibration amplitude points are located at both ends and the center of the resonance main unit 2 in the length direction.

At the position of the maximum vibration amplitude point in the central portion in the length direction of the resonance main portion 2, the joining tool portion 4 is provided so as to project downward from the outer surface of the resonance main portion 2. When the dimension of the joining tool portion 4 protruding downward from the outer surface of the resonance main portion 2 is small, the joining tool portion 4 also protrudes from the outer surface of the resonance main portion 2 to at least one side of the upper side, the front side, or the rear side. It may be provided.

A support portion 3 is provided so as to project outward from the outer surface of the resonance main body portion 2 at the position of the minimum vibration amplitude point between the central portion and both end portions in the length direction of the resonance main body portion 2. The minimum vibration amplitude point is also called a nodal point. The mode in which the support portion 3 projects outward from the outer surface of the resonance main portion 2 will be clarified with reference to paragraph [0013] and FIG. 2 of Japanese Patent No. 4564548.

When the resonance main portion 2 has a round bar shape, the support portion 3 may surround the resonance main portion 2 in the circumferential direction. The mode in which the support portion 3 surrounds the resonance main portion 2 in the circumferential direction becomes clear with reference to FIG. 5 or FIG. 18 of Japanese Patent No. 291394.

Although the structure of the resonance main part 2 is complicated, the structure may be such that the central part having the joining tool part 4 and both ends having the support part 3 are coaxially connected by a connecting tool such as a headless screw or a screw rod. good. The central portion of the resonance main portion 2 having the joining tool portion 4 is expressed as a horn, and both ends of the resonance main portion 2 having the support portion 3 are expressed as boosters.

Even if the joining tool portion 4 has a structure integrally provided with the resonance main portion 2, a separate body from the resonance main portion 2 is connected to the resonance main portion 2 with a connector such as a headless screw or a screw rod. It may be a structure. In the case of a structure in which the joining tool portion 4 is connected to the resonance main portion 2, the joining tool portion 4 is attached to the resonance main portion 2 like a brazing material without using a connecting tool such as a headless screw or a screw rod. It may be bonded with a bonding agent. As the overall shape of the joining tool portion 4, a shape such as a round bar shape or a square bar shape can be applied.

The joining device 31 shown in FIG. 2 is provided with a pressurizing mechanism 33 on the upper portion of the device frame 32, and a holding tool 35 is provided on the output member 34 of the pressurizing mechanism 33. The holder 35 is provided with holding portions 37 on both sides of the space portion 36 penetrating front and back and downward in the lateral direction as a left-right direction. In the holder 35, the length direction of the resonator 1 is directed to the lateral direction indicated by the arrow 9, and the space portion 36 and the holder are prevented so that parts other than the support portion 3 of the resonator 1 do not come into contact with the holder 35. A joining resonator 1 is arranged outside the 35, the support portion 3 is supported by the holding portion 37, and the joining resonator 1 for joining the joining target body 41 by using ultrasonic vibration or sonic vibration is installed in the holder 35. As a result, the resonator 1 having the oscillator 38 at one end is horizontally mounted on both sides of the holder 35 which can be raised and lowered.

The output end 39 of the vibrator 38 is coaxially connected to one end of the resonator 1 in the lateral direction by a connector such as a headless screw or a screw rod, and the resonator 1 is a sound wave transmitted from the vibrator 38. Resonates with vibration or ultrasonic vibration. At the lower part of the device frame 32, a receiving jig 40 as an anvil is provided so as to be located directly under the joining tool portion 4. Since the receiving jig 40 used in the joining device 31 shown in FIG. 2 constitutes a joining receiving jig 40 for joining the joining target body 41 by using ultrasonic vibration or sonic vibration, it is joined in this specification. Receiving jig 40 is expressed as receiving jig 40. As the resonator 1, both support types having support portions 3 on both sides in the lateral direction from the joining tool portion 4 are shown, but one-sided support type having support portions on one side in the lateral direction from the joining tool portion 4 is shown. But it may be. However, as the resonator 1, the double-supported type has no bias in the weight applied to the bonded target body when the bonded object is loaded by the bonding tool portion 4 as compared with the single-supported type.

When the joining target body 41 is joined by the joining device 31 shown in FIG. 2, a space into which the joining target body 41 can be inserted is formed between the tip portion 6 of the resonator 1 and the receiving jig 40, and resonance occurs. In a state where the tip portion 6 of the vessel 1 and the receiving jig 40 face each other in the vertical direction, the joining object 41 receives the plate-shaped metal portion 45 in the joining object 41 so as to come into contact with the receiving jig 40. It is mounted on the jig 40.

Next, as the pressurizing mechanism 33 is driven and the output member 34 is lowered, the joining object 41 is sandwiched between the tip portion 6 of the resonator 1 and the receiving jig 40 from above and below and pressurized. The resonator 1 resonates with the sonic vibration or the ultrasonic vibration transmitted from the vibrator 38, the tip portion 6 of the resonator 1 vibrates in the lateral direction indicated by the arrow 9, and the joining target portion of the joining target body 41 is the tip. It is joined by receiving the pressurization from the part 6 and the vibration energy.

The output end of the resonator 1 and the oscillator 38 between the central portion of the resonator 1 having the junction tool portion 4 and both ends having the support portion 3, or between the resonator 1 and the junction tool portion 4. An intermediate booster (not shown) may be integrally coupled to the portion 39 in a laterally coaxial state by a connector made of a headless screw or a screw rod. The intermediate booster is for adjusting the amplitude of the resonator 1. By changing the magnification (shape) of the intermediate booster, the amplitude of the resonator 1 can be increased or decreased. When the intermediate booster is not used, the amplitude of the resonator 1 is the same as, that is, 1 times the amplitude of the oscillator 38. However, there are cases where a 1x intermediate booster is used.

As the joining device 31, the joining device in which the resonator disclosed in Japanese Patent No. 291395 is arranged in a vertical position can also be applied.

Peripheral protrusions (not shown) may be provided around the tip portion 6 composed of the large protrusion 7 and the small protrusion 8 on the surface 5 on the work side shown in FIG. The dimension protruding from the work-side surface 5 of the peripheral protrusion not shown is smaller than the dimension protruding from the work-side surface 5 of the tip portion 6, and the peripheral protrusion omitted from the illustration at the time of joining is smaller than the dimension protruding from the work-side surface 5. The joining target body 41 can be pressed down and joined without being destroyed.

Further, FIG. 2 illustrates a case where the tip portion 6 of the resonator 1 has the protrusions 7 and 8 stacked in two stages in the direction facing the resonator 1 and the receiving jig 40. The same applies to a structure in which the protrusions of the above are stacked in three or more stages in the direction facing the resonator 1 and the receiving jig 40. For example, in a structure in which a plurality of protrusions are stacked in three stages in the opposite direction of the resonator 1 and the receiving jig 40, the protrusion closest to the side of the joining object 41 has the smallest shape. The protrusion closest to the resonator 1 side has the largest shape, and the protrusion located between the protrusion closest to the side of the object to be joined 41 and the protrusion closest to the side of the resonator 1 is. The shape is larger than the smallest protrusion closest to the side of the object to be joined 41 and smaller than the largest protrusion closest to the resonator 1. In such a structure in which a plurality of protrusions are stacked in three stages or three or more stages in the direction facing the resonator 1 and the receiving jig 40, the shape of each of the plurality of protrusions is the shape of the resonator 1. The shape becomes smaller from the side toward the side of the joining object 41. Further, a plurality of tip portions 6 formed by stacking a plurality of protrusions in two or three or more stages may be provided on one work-side surface 5 of the resonator 1.

FIG. 3 will explain a structure in which the tip portion 6 of the resonator 1 according to the embodiment for carrying out the invention is composed of a large protrusion 7 and a small protrusion 8 in two stages. As shown in FIG. A of FIG. 3, when the tip portion 6 is viewed from the bottom surface, the large protrusion portion 7 has a semi-cylindrical shape, but may be circular. The outer surfaces of both ends of the Kamaboko-shaped large protrusion 7 in the longitudinal direction are configured as the convex arcuate surface portion 71. The convex arcuate surface portion 71 has a mode in which the large protrusion 7 is half-circulated in a horizontal plane orthogonal to the center line extending in the longitudinal direction of the outer surface of the large protrusion 7 with the center line extending in the longitudinal direction of the outer surface of the large protrusion 7 as the center. A smooth convex arc is drawn from the side of the center line extending in the longitudinal direction of the outer surface of the large protrusion 7 to both sides in the direction orthogonal to the center line extending in the longitudinal direction of the outer surface of the large protrusion 7. Externally attached to both ends of the portion 7 in the lateral direction.

The small protrusion 8 has a similar-shaped semi-cylindrical shape that is smaller than the large protrusion 7, but may be circular. The outer surfaces of both ends of the small protrusions 8 in the longitudinal direction are configured as convex arcuate surface portions 81. The convex arcuate surface portion 81 has a mode in which the small protrusion 8 is half-circulated in a horizontal plane orthogonal to the center line extending in the longitudinal direction of the outer surface of the small protrusion 8 with the center line extending in the longitudinal direction of the outer surface of the small protrusion 8 as the center. , A smooth convex arc is drawn from the side of the center line extending in the longitudinal direction of the outer surface of the small protrusion 8 to both sides in the direction orthogonal to the center line extending in the longitudinal direction of the outer surface of the small protrusion 8. Externally attached to both ends of the portion 8 in the lateral direction. In FIG. 3A, the small protrusions 8 may be divided into a plurality of parts in the longitudinal direction, that is, a plurality of small protrusions 8 may be provided on one large protrusion 7.

As shown in FIG. 3B, the convex arcuate surface portion 71 is a center extending in the vertical direction of the outer surface on both ends of the large protrusion 7 with the center line extending in the vertical direction of the outer surface of the large protrusion 7 as the center. A smooth convex arc is drawn from the surface 5 on the work side toward the center of the outer surface of the large protrusion 7 in a mode of making a 1/4 circumference of the large protrusion 7 in the vertical plane on the line. Smoothly continuous with the convex arcuate surface portion 72 as the outer surface of the portion 7 in the lateral direction without a step, and reaches the surface 5 on the work side. That is, the outer surfaces of both ends of the large protrusion 7 in the longitudinal direction are convex to the outside from the side of the resonator 1 without the presence of angular sharp edges due to the convex arcuate surface portion 71 shown in FIG. 3B. Consists of the arc plane of. The vertical position of the central portion of the convex arcuate surface portion 71 on which the convex arcuate surface is drawn may be either the same position as the surface 5 on the work side or a different position.

Further, the convex arcuate surface portion 81 is a small protrusion portion in a vertical plane on a center line extending in the vertical direction of the outer surface on both ends of the small protrusion 8 with the center line extending in the vertical direction of the outer surface of the small protrusion 8 as the center. A smooth convex arc is drawn from the surface 5 on the work side toward the center of the outer surface of the small protrusion 8 in a manner of rotating 1/4 of the 8 as the outer surface of the small protrusion 8 in the lateral direction. Smoothly continuous with the convex arcuate surface portion 82 without a step, and reaches the convex arcuate surface portion 72. That is, the outer surfaces of both ends of the small protrusions 8 in the longitudinal direction are convex to the outside from the side of the resonator 1 without the presence of angular sharp edges due to the convex arcuate surface portion 81 shown in FIG. 3B. Consists of the arc plane of. The vertical position of the central portion of the convex arcuate surface portion 81 on which the convex arcuate surface is drawn may be either the same position as or different from the convex arcuate surface portion 72.

As shown in FIG. 3C, the outer surface of the large protrusion 7 in the lateral direction is configured as the convex arcuate surface portion 72. The convex arcuate surface portion 72 has the large protrusion 7 in the vertical plane on the center line extending in the vertical direction of the outer surface on the side of the middle portion of the large protrusion 7 with the center line extending in the vertical direction of the outer surface of the large protrusion 7 as the center. A smooth convex arc is drawn from the surface 5 on the work side toward the center of the outer surface of the large protrusion 7 in a half-circumferential manner, and reaches the surface 5 on the work side. That is, the outer surface of the large protrusion 7 is a surface on the work side where there is no angular sharp edge because the convex arcuate surface portions 71 and 72 shown in FIGS. B and C are smoothly continuous with each other without a step. It constitutes a convex arcuate surface protruding downward from 5. Further, the outer surface of the small protrusion 8 in the lateral direction is configured as a convex arcuate surface portion 82. The convex arcuate surface portion 82 has the small protrusions 8 in the vertical plane on the center line extending in the vertical direction of the outer surface on the side of the intermediate portion of the small protrusions 8 with the center line extending in the vertical direction of the outer surface of the small protrusions 8 as the center. A smooth convex arc is drawn from the side of the large protrusion 7 toward the center of the outer surface of the small protrusion 8 in a half-circumferential manner, and reaches the convex arc-shaped surface portion 72. That is, on the outer surface of the small protrusion 8, the convex arc-shaped surface portions 81 and 82 shown in FIGS. B and C are smoothly continuous with each other without a step, so that the large protrusion 7 does not have an angular sharp edge. It constitutes a convex arcuate surface protruding downward from.

Using FIG. 4, the shape of the root portion on the side of the resonator 1 in the large protrusion 7 according to the embodiment for carrying out the invention is different from that in FIG. 2, and the root portion on the side of the large protrusion 21 in the small protrusion 8 is used. A shape different from that of FIG. 2 will be described. As shown in FIG. 4B, the root portion on the longitudinal side of the large protrusion 7 is configured as the concave arcuate surface portion 73. The concave arcuate surface portion 73 draws a smooth concave arc from the side of the large protrusion 7 toward the surface 5 on the work side, and circumscribes the convex arcuate surface portion 71 and the surface 5 on the work side. That is, the root portion of the large protrusion 7 is formed by the concave arcuate surface portion 73, which is a concave arcuate surface recessed from the outside toward the resonator 1 without the presence of angular sharp edges. Further, the root portion on the longitudinal side of the small protrusion portion 8 is configured as a concave arcuate surface portion 83. The concave arcuate surface portion 83 draws a smooth concave arc from the side of the small protrusion portion 8 to the side of the large protrusion portion 7, and circumscribes the convex arcuate surface portion 81 and the convex arcuate surface portion 72. That is, the root portion on the longitudinal side of the small protrusion 11 forms a concave arc surface recessed from the outside toward the resonator 1 by the concave arcuate surface portion 83 without the presence of angular sharp edges.

As shown in FIG. C of FIG. 4, the root portion of the large protrusion 7 in the lateral direction is configured as the concave arcuate surface portion 74. The concave arcuate surface portion 74 draws a smooth concave arc from the side of the large protrusion 7 toward the surface 5 on the work side, and circumscribes the surface 5 on the work side and the convex arcuate surface portion 71. That is, in the root portion of the large protrusion 7, the concave arc-shaped surface portions 73 and 74 shown in FIGS. B and C are smoothly continuous with each other, so that the resonator 1 from the outside does not have an angular sharp edge. It constitutes a concave arcuate surface that is recessed on the side of. Therefore, cracks due to ultrasonic vibration or sonic vibration during joining do not occur at the root of the large protrusion 7. Further, the root portion of the small protrusion 8 in the lateral direction is configured as a concave arcuate surface portion 84. The concave arcuate surface portion 84 draws a smooth concave arc from the side of the small protrusion portion 8 toward the side of the large protrusion portion 7, and circumscribes the convex arcuate surface portions 71 and 82. That is, the root portion of the small protrusion 8 has the concave arc-shaped surface portions 83 and 84 shown in FIGS. It constitutes a concave arcuate surface that is recessed on the side of. Therefore, cracks due to ultrasonic vibration or sonic vibration during joining do not occur at the root of the small protrusion 8.

1 Resonator 2 Resonant main part 3 Support part 4 Joining tool part 5 Work side surface 6 Tip part that presses the joining target body 41 of the resonator 3 Large protrusion 8 Small protrusion 9 Lateral arrow 10 Pressurization Arrow 31 indicating the direction 31 Joining device 32 Device frame 33 Pressurizing mechanism 34 Output member of pressurizing mechanism 33 35 Holder 36 Space part of holder 35 Holding part of holder 35 38 Transducer 39 Output end of oscillator 38 Part 40 Receiving jig 41 Joining object 42 Thermoplastic synthetic resin film 43 Metal foil 44 Multilayer part 45 Metal part 46 Joining target part 47 Clip part 71 Convex arc-shaped surface part 72 as the outer surface of both ends of the large protrusion 7 in the longitudinal direction Convex arcuate surface as the outer surface of the large protrusion 7 in the lateral direction 73 Concave arcuate surface as the roots of both ends of the large protrusion 7 in the longitudinal direction 74 As the roots of both ends of the large protrusion 7 in the lateral direction Concave arcuate surface portion 81 Convex arcuate surface portion as the outer surface of both ends of the small protrusion 8 in the longitudinal direction 82 Convex arcuate surface portion as the outer surface of the small protrusion 8 in the lateral direction 83 Concave arcuate surface portion as the root portion Concave arcuate surface portion 84 as the root portion of both ends of the small protrusion 8 in the lateral direction

Claims (2)

The tip of the resonator on the side of the object to be joined has a plurality of protrusions having an angular sharp edge on the outer surface in the direction opposite to the tip and the receiving jig provided below the tip. The structure is such that the protrusions on the side of the object to be joined are stacked in more than one step and the protrusions on the side of the resonator are smaller than the protrusions on the side of the resonator. A joining object having a structure in which multi-layered portions that are alternately stacked vertically is arranged between the tip portion and the receiving jig and is pressurized from the vertical direction, and the tip portion is pressed. A plurality of multi-layered portions in the junction object that resonate with the sonic vibration or ultrasonic vibration transmitted from the vibrator attached to one end of the resonator and vibrate in the lateral direction orthogonal to the pressurized direction. A joining method by ultrasonic vibration or sonic vibration, which comprises joining a sheet of metal foil and a metal part collectively and in a conductive manner. The method for joining by ultrasonic vibration or sonic vibration according to claim 1, wherein the root portion of the protrusion on the side of the resonator becomes a concave arcuate surface portion recessed from the outside toward the resonator.

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