CN210099211U

CN210099211U - Welding head and ultrasonic welding device

Info

Publication number: CN210099211U
Application number: CN201920729438.1U
Authority: CN
Inventors: 刘小荣; 徐慧晖; 王磊
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-02-21
Anticipated expiration: 2029-05-21

Abstract

The utility model relates to a soldered connection and ultrasonic welding device, this soldered connection includes: a body portion having at least one welding surface; the first welding teeth are arranged on the welding surface and distributed in rows and columns along a first direction and a second direction which are intersected, wherein the first direction and the welding moving direction of the welding head form a preset angle theta, and the preset angle theta is 45 degrees +/-15 degrees. The welding head can enable flash generated by plastic deformation of a workpiece in the welding process to be blocked by the first welding teeth in the welding moving direction parallel to and/or perpendicular to the welding head, so that the flash is prevented from overflowing a welding surface to influence the final size of the workpiece, the welding quality and the welding efficiency of the workpiece under high-frequency and high-pressure working conditions are improved, and the later-stage finishing cost is saved.

Description

Welding head and ultrasonic welding device

Technical Field

The utility model relates to the field of welding technique, especially, relate to a soldered connection and ultrasonic welding device.

Background

In recent years, ultrasonic welding technology for metal materials is rapidly developed, and particularly joint welding of copper and aluminum metal materials is performed. Because copper and aluminum materials are easy to generate brittle phases in the fusion welding process, the reliability of a connecting joint formed after welding is low, and the solid phase connection of ultrasonic welding is reliable, so that the method becomes a preferred technology for connecting dissimilar metal materials such as copper and aluminum.

However, the welding head for ultrasonic welding of metal materials is sensitive to the thickness of the materials, is not easy to control, and is easy to generate plastic deformation of the welding materials particularly under high frequency and high pressure, so that flash is generated on the periphery of the welding head, the final size of the welding materials is influenced, and the welding quality and the welding efficiency are reduced only by later finishing.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a soldered connection and ultrasonic welding device, this soldered connection can improve welding quality and welding efficiency of work piece under high frequency, high-pressure operating mode.

In a first aspect, the utility model provides a soldered connection, it includes: a body portion having at least one welding surface; the first welding teeth are arranged on the welding surface and distributed in rows and columns along a first direction and a second direction which are intersected, wherein the first direction and the welding moving direction of the welding head form a preset angle theta, and the preset angle theta is 45 degrees +/-15 degrees.

According to the utility model discloses an aspect, the first tooth that welds is the toper structure, and the first one end that welds the tooth and be close to the face of weld is first root, is formed with first clearance d1 between the first root of two adjacent first welding teeth, and first clearance d1 satisfies the following condition: d1 is (0.05-0.2) × W1, where W1 is the smaller cross-sectional width dimension of the first root portion in the first and second directions.

According to the utility model discloses an aspect, the one end that the face of weld was kept away from to first welding tooth is formed with the first tangent plane that is on a parallel with the face of weld, and the cross sectional area C1 of first tangent plane and the cross sectional area D1 of first root satisfy following condition: c1<0.1 × D1.

According to the utility model discloses an aspect, soldered connection still includes the second and welds the tooth, and the second welds the tooth and sets up in the edge of face of weld, and the second welds the tooth and be the toper structure, and the second welds the one end that the tooth is close to the face of weld and be the second root, and the first cross sectional area D1 who welds the first root of tooth is greater than the cross sectional area D2 that the second welded the second root of tooth.

According to an aspect of the embodiment of the utility model, the height dimension H1 of first welding tooth and the height dimension H2 of second welding tooth satisfy the following condition: h2 is (0.25-0.75) multiplied by H1.

According to the utility model discloses an aspect, the one end that the face of weld was kept away from to the second welding tooth is formed with the second tangent plane that is on a parallel with the face of weld, and the cross sectional area C2 of second tangent plane and the cross sectional area D2 of second root satisfy following condition: c2<0.1 × D2.

According to the utility model discloses an aspect, the first tooth that welds and the crisscross setting in the edge of face of weld of second welding tooth.

According to an aspect of the embodiment of the present invention, a second gap d3 is formed between the first root of the first welding tooth and the second root of the adjacent second welding tooth, and the width dimension of the second gap d3 is equal to the width dimension of the first gap d 1.

According to the utility model discloses an aspect, the outside edge of face of weld is provided with the fillet, and the radius size R of fillet satisfies following condition: r is more than or equal to 0.5 xW 2, wherein W2 is the smaller cross-sectional width dimension of the second root of the second welding tooth in the first direction and the second direction.

On the other hand, the utility model also provides an ultrasonic welding device, it includes: an ultrasonic oscillator that generates ultrasonic waves; the welding head of any of the welding heads described above is connected to an ultrasonic oscillator.

The embodiment of the utility model provides a pair of soldered connection and ultrasonic welding device, be a plurality of first welding teeth that ranks was arranged along crossing first direction and second direction through setting up on at least one face of weld of soldered connection, and the predetermined angle setting of the welding moving direction slope of first direction and soldered connection, make the work piece take place the flash that plastic deformation produced in welding process and receive blockking of first welding tooth on the welding moving direction that is on a parallel with and/or perpendicular to soldered connection, thereby prevent that the flash from spilling over the face of weld and influencing the final size of work piece, the work piece has been improved at the high frequency, welding quality and welding efficiency under the high-pressure operating mode, the later stage cost of finishing has been saved.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of an ultrasonic welding apparatus according to an embodiment of the present invention;

FIG. 2 is a perspective view of a bonding head of the ultrasonic bonding apparatus shown in FIG. 1;

FIG. 3 is an enlarged schematic view of area B of the weld head of FIG. 2;

fig. 4 is a partial structural view of the welding head shown in fig. 2.

Wherein:

1-first welding tooth, 11-first root, 12-first tangent plane, 13-first conical inclined plane, theta-preset angle, α -first inclination angle, 2-second welding tooth, 21-second root, 22-second tangent plane, 23-second conical inclined plane, β -second inclination angle, 3-main body part, 3 a-welding surface, 3 b-round angle, 4-coupling part and 5-fixing part;

100-a welding head; 200-an ultrasonic oscillator; m1-first workpiece; m2-second workpiece.

In the drawings, like parts are designated with like reference numerals, and the drawings are not drawn to scale.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The directional terms appearing in the following description are directions shown in the drawings, and do not limit the specific structure of the welding head of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

For better understanding of the present invention, the welding head and the ultrasonic welding device provided by the embodiments of the present invention are described in detail below with reference to fig. 1 to 4.

Referring to fig. 1, an embodiment of the present invention provides an ultrasonic welding apparatus, which includes a welding head 100 and an ultrasonic oscillator 200, wherein the ultrasonic oscillator 200 is used for generating ultrasonic waves, and the welding head 100 is connected to the ultrasonic oscillator 200.

As shown in fig. 1, after the welding head 100 is electrically connected to the ultrasonic oscillator 200, the ultrasonic oscillator converts, for example, a 60HZ alternating current into a high frequency current of 20kHZ or more, converts electric energy into an ultrasonic wave as mechanical energy, amplifies the ultrasonic wave and transmits the ultrasonic wave to the welding head 100, and the welding head 100 collects a certain amplitude and energy to weld the first workpiece M1 and the second workpiece M2.

Specifically, when the ultrasonic wave generated by the ultrasonic oscillator 200 is applied to the first workpiece M1 and the second workpiece M2 through the welding head 100, high-frequency vibration of a certain amplitude is generated several ten thousand times per second, and ultrasonic energy is transmitted to the welding area through the first workpiece M1, and since the acoustic resistance of the welding area, that is, the interface between the first workpiece M1 and the second workpiece M2 is large, local high temperature is generated and concentrated in the welding area, so that the contact surfaces of the first workpiece M1 and the second workpiece M2 are rapidly melted, and are fused into a whole after a certain pressure is applied.

The welding process neither supplies current to the first workpiece M1 or the second workpiece M2 nor applies a high temperature heat source to the workpieces, but converts the vibration energy of the ultrasonic oscillator into frictional work, deformation energy and limited temperature rise among the workpieces under static pressure. After the ultrasonic wave stops acting, the pressure is kept for several seconds to solidify and form, so that a firm molecular chain is formed, and the welding strength can be close to the strength of the raw material.

The ultrasonic welding device can be used for welding plastic workpieces, and can also be used for performing single-point welding, multi-point welding and short-strip welding on filaments or sheet materials of nonferrous metals such as copper, silver, aluminum, nickel and the like, and is widely applied to welding of silicon controlled rectifier leads, fuse pieces, electric appliance leads, lithium battery pole pieces and pole lugs.

The specific structure of the welding head 100 according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 2 and fig. 3 together, an embodiment of the present invention provides a welding head 100, which includes a main body 3 and a plurality of first welding teeth 1 disposed on the main body 3.

The main body portion 3 has at least one welding surface 3a, and optionally, the main body portion 3 is provided as a columnar structure, such as a square column or a cylinder, and the at least one welding surface 3a is provided in the circumferential direction of one end of the main body portion 3.

The plurality of first welding teeth 1 are arranged on the welding surface 3a and are distributed in rows and columns along a first direction X and a second direction Y which are intersected with each other, wherein the first direction X and a welding moving direction V of the welding head form a preset angle theta, and the preset angle theta is 45 degrees +/-15 degrees. Optionally, the first direction X and the second direction Y are perpendicular to each other, facilitating machining of the welding head.

The first welding tooth 1 is used for friction contact with workpieces, two workpieces are welded in a solid state under the condition that the workpieces are not melted, and the workpieces can be made of the same or different metal materials, such as copper, silver, aluminum, nickel and the like.

The workpiece can be plastically deformed during the welding process of the first welding tooth 1 to generate flash, and the flash is blocked by the first welding tooth 1 in the direction parallel and/or perpendicular to the welding moving direction V of the welding head, so that the flash can be prevented from overflowing the welding surface to influence the final size of the workpiece and even interfere with other components.

In addition, the welding head 100 further includes a coupling portion 4 connected to the main body portion 3, and one end of the coupling portion 4 may be connected to, for example, an ultrasonic oscillator, and the other end may be detachably connected, for example, screwed, to the main body portion 3 via a fixing portion 5, so that the welding head 100 may be easily replaced.

The embodiment of the utility model provides a soldered connection 100, through a plurality of first welding teeth 1 that are ranks and arrange along crossing first direction X and second direction Y setting on at least one face of weld, and first direction X is inclination setting with the welding moving direction of soldered connection, make the work piece take place the flash that plastic deformation produced in welding process and receive stopping of first welding teeth 1 on the welding moving direction that is on a parallel with and/or perpendicular to soldered connection, thereby prevent that the flash from spilling over face of weld 3a and influencing the final size of work piece, the work piece has been improved at the high frequency, welding quality and welding efficiency under the high-pressure operating mode, the later stage cost of repairing has been saved.

The specific structure of the welding head is described in further detail below with reference to the accompanying drawings.

Referring again to fig. 3, the first welding tooth 1 is a cone-shaped structure, such as but not limited to a cone, a quadrangular pyramid, or a hexagonal pyramid. One end of each first welding tooth 1 close to the welding surface 3a is a first root 11, a first gap d1 is formed between the first roots 11 of two adjacent first welding teeth 1, and the first gap d1 satisfies the following conditions: d1 is (0.05 to 0.2) × W1, where W1 is the smaller cross-sectional width dimension of the first root 11 in the first direction X and the second direction Y.

Alternatively, the first root 11 of the first tooth 1 has equal cross-sectional width dimensions in the first direction X and in the second direction Y. The first gap d1 prevents the frictionally heated material of the workpiece from adhering to the surface of the first tooth 1 during welding and affecting the welding operation.

The end of the first tooth 1 away from the welding surface 3a is formed with a first tangent plane 12 parallel to the welding surface 3a, and the cross-sectional area C1 of the first tangent plane 12 and the cross-sectional area D1 of the first root 11 satisfy the following condition: c1<0.1 × D1. Generally, the contact depth of the first welding tooth 1 and the welding area surface of the metal workpiece can be 0.5mm-0.6mm, and the first tangent plane 12 can prevent the first welding tooth 1 from penetrating the workpiece, thereby improving the welding stability.

In addition, a first tapered inclined surface 13 is formed between the first root 11 and the first cut surface 12 of the first welding tooth 1, and a first inclination angle α of the first tapered inclined surface 13 relative to the welding surface 3a is 45 ° ± 15 °, so that the workpieces can achieve better plastic deformation and frictional heat generation during welding.

Due to the arrangement of the plurality of first welding teeth 1 in the first direction X and the second direction at the predetermined angle θ to the welding movement direction V of the welding head, the height of the first welding tooth 1 at the edge of the welding face 3a may be slightly lower than the first welding tooth 1 in the middle, or the cross-sectional area D1 of the first root 11 of the first welding tooth 1 may be incomplete, or there may be an area not covered by the first welding tooth 1.

Further, the welding head 100 further comprises a second welding tooth 2, and the second welding tooth 2 is disposed at the edge of the welding surface 3 a. In order to prevent flash produced during the welding of workpieces from clogging up to areas not covered by the first tooth 1 and being difficult to clean, the second tooth 2 is optionally filled up to the edge of the welding surface 3a and to areas not covered by the first tooth 1.

The second welding tooth 2 is a conical structure, such as but not limited to a pyramid like a cone, a quadrangular pyramid, or a hexagonal pyramid, the second welding tooth 2 is a conical structure, one end of the second welding tooth 2 close to the welding surface 3a is a second root 21, and the cross-sectional area D1 of the first root 11 of the first welding tooth 1 is larger than the cross-sectional area D2 of the second root 21 of the second welding tooth 2.

Flash generated by plastic deformation of the plurality of first welding teeth 1 during welding of the workpieces is discharged to the edge of the welding surface 3a through the first gap d 1. In order to prevent the flash from cooling and solidifying into flash particles with a certain height to affect the final size of the workpiece, the flash can be trimmed in time by the second welding tooth 2, so that the height dimension H1 of the first welding tooth 1 and the height dimension H2 of the second welding tooth 2 satisfy the following conditions: h2 is (0.25-0.75) multiplied by H1.

Further, the height of the first tooth 1 at the edge of the soldering surface 3a is still higher than the second tooth 2. Because the height of the second welding tooth 2 is relatively low, and the section area D2 of the second root part 21 is small, the flash generated by the workpiece in the welding process of the first welding tooth 1 is extruded to the space between the second welding tooth 2 and the welding area contact surface of the workpiece, the flash generated by one first welding tooth 1 in the welding process of the workpiece can be timely and quickly trimmed through more than two second welding teeth 2, and the trimming efficiency and the aesthetic degree are improved. The second welding teeth 2 can enable the flash to be evenly flattened and attached to the surface of the workpiece due to friction work before the flash is cooled and solidified into flash particles with a certain height, so that the final size of the welded workpiece can meet the use requirement and cannot interfere with other parts.

Referring to fig. 4, an end of the second tooth 2 away from the welding surface 3a is formed with a second cut surface 22 parallel to the welding surface 3a, and a cross-sectional area C2 of the second cut surface 22 and a cross-sectional area D2 of the second root portion 21 satisfy the following condition: c2<0.1 × D2. The second cut surface 22 can prevent the second welding tooth 2 from penetrating the workpiece, and improve the welding stability.

When the first cut surface 12 of the first tooth 1 is in deep contact with the land surface of the workpiece, the second cut surface 22 of the second tooth 2 may also contact the land surface of the workpiece, and in order to prevent the second tooth 2 from penetrating the workpiece and improve the welding stability, the contact depth of the second tooth 2 with the land surface of the metal workpiece may be 0.3 mm.

In addition, a second tapered inclined surface 23 is formed between the second root portion 21 and the second tangent plane 22 of the second welding tooth 2, and a second inclination angle β of the second tapered inclined surface 23 relative to the welding surface 3a is 45 ° ± 15 °, so that the workpieces can be better plastically deformed and generate heat by friction during welding.

The welding surfaces 3a may be arranged in a square or circular shape. For example, the welding surface 3a is square, a plurality of first welding teeth 1 are distributed on the welding surface 3a in rows and columns along a first direction X and a second direction Y which are intersected, and when a preset angle theta between the first direction X and a welding moving direction V of the welding head is 45 degrees, the first welding teeth 1 and the second welding teeth 2 are arranged at the edge of the welding surface in a staggered mode.

Thus, a second gap d2 is formed between the first root 11 of the first tooth 1 and the second root 21 of the adjacent second tooth 2, and the width dimension of the second gap d2 is equal to the width dimension of the first gap d 1. Thereby, the burr generated in the welding process of the work can be discharged out of the welding face 3a along the second gap d 2.

Further, the outer edge of the welding surface 3a is provided with a fillet 3b, and the radius dimension R of the fillet 3b satisfies the following condition: r is more than or equal to 0.5 xW 2, wherein W2 is the smaller cross-sectional width dimension of the second root 21 of the second welding tooth 2 in the first direction X and the second direction Y. The rounded corners 3b allow the flash to be discharged from the soldering surface 3a more smoothly.

In addition, the main body part 3 can have more than two welding surfaces 3a, and the sizes of the first welding tooth 1 and the second welding tooth 2 on each welding surface 3a can be different, so that the same welding head can weld metal workpieces with different specifications, and the universality of the welding head is improved. The welding head 100 is not limited to being used in the ultrasonic welding process, but may be used in other welding processes, such as fusion welding, and the like, and will not be described again.

It is understood that the first welding tooth 1 and the second welding tooth 2 may be both pyramids, one of them may be pyramids, the other may be cones, or both may be cones, etc. For workpieces of different materials, such as plastic workpieces, the structure, shape, arrangement, and contact depth of the first welding tooth 1 and the second welding tooth 2 with the workpiece may also be different, depending on the specific application.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A welding head (100), comprising:

a main body (3) having at least one welding surface (3 a);

the welding device comprises a plurality of first welding teeth (1) which are arranged on the welding surface (3a) and distributed in rows and columns along a first direction (X) and a second direction (Y) which are intersected with each other, wherein the first direction (X) and a welding moving direction (V) of the welding head form a preset angle theta, and the preset angle theta is 45 degrees +/-15 degrees.

2. The welding head (100) according to claim 1, wherein the first welding tooth (1) is a conical structure, one end of the first welding tooth (1) close to the welding face (3a) is a first root (11), a first gap d1 is formed between the first root (11) of two adjacent first welding teeth (1), and the first gap d1 satisfies the following condition: d1 is (0.05 to 0.2) × W1, where W1 is a smaller cross-sectional width dimension of the first root portion (11) in the first direction (X) and the second direction (Y).

3. The welding head (100) according to claim 2, characterized in that the end of the first tooth (1) remote from the welding face (3a) is formed with a first chamfer (12) parallel to the welding face (3a), and the cross-sectional area C1 of the first chamfer (12) and the cross-sectional area D1 of the first root (11) satisfy the following condition: c1<0.1 × D1.

4. The welding head (100) according to claim 2, characterized in that the welding head (100) further comprises a second welding tooth (2), the second welding tooth (2) being arranged at the edge of the welding face (3a), the second welding tooth (2) being a conical structure, the end of the second welding tooth (2) near the welding face (3a) being a second root (21), the cross-sectional area D1 of the first root (11) of the first welding tooth (1) being larger than the cross-sectional area D2 of the second root (21) of the second welding tooth (2).

5. The welding head (100) according to claim 4, characterized in that the height dimension H1 of the first welding tooth (1) and the height dimension H2 of the second welding tooth (2) satisfy the following condition: h2 is (0.25-0.75) multiplied by H1.

6. The welding head (100) according to claim 4, characterized in that the end of the second tooth (2) remote from the welding face (3a) is formed with a second chamfer (22) parallel to the welding face (3a), and the cross-sectional area C2 of the second chamfer (22) and the cross-sectional area D2 of the second root (21) satisfy the following condition: c2<0.1 × D2.

7. Welding head (100) according to claim 4, characterized in that the first welding tooth (1) and the second welding tooth (2) are staggered at the edge of the welding face (3 a).

8. Welding head (100) according to claim 7, characterized in that a second gap d2 is formed between the first root (11) of the first tooth (1) and the second root (21) of the adjacent second tooth (2), the width dimension of the second gap d2 being equal to the width dimension of the first gap d 1.

9. Welding head (100) according to claim 4, characterized in that the outer edge of the welding face (3a) is provided with a fillet (3b), the radius dimension R of the fillet (3b) satisfying the following condition: r is more than or equal to 0.5 xW 2, wherein W2 is the smaller cross-sectional width dimension of the second root (21) of the second welding tooth (2) in the first direction (X) and the second direction (Y).

10. An ultrasonic welding apparatus, comprising:

an ultrasonic oscillator (200) that generates ultrasonic waves;

the welding head (100) of any of the claims 1 to 9, said welding head (100) being connected to said ultrasonic oscillator (200).