Ultrasonic welding tooth structure

Abstract

The utility model discloses an ultrasonic welding tooth structure which comprises an ultrasonic welding head and a plurality of welding teeth arranged on the surface of a welding head body, an installation block is arranged on the surface of the side, away from the welding teeth, of the welding head body, the ultrasonic welding head comprises a horizontal part and a vertical part, and installation grooves are formed in the upper end face and the lower end face of the vertical part respectively. Two sets of hole grooves are formed in the surface of the front side of the mounting block, first inserting holes are formed in the inner bottom walls of the hole grooves, first screw holes are formed in the inner bottom walls of the mounting grooves, first gaskets sleeve the threaded parts of the first bolts, an L-shaped connecting plate is arranged on the surface of the mounting block, the L-shaped connecting plate comprises a vertical plate and a transverse plate, and clamping groove openings are formed in groove openings of the mounting grooves. A second inserting hole is formed in the transverse plate in a penetrating mode, a second screw hole is formed in the outer side surface of the vertical part, and the threaded part of the second bolt is sleeved with a second gasket. According to the device, the mounting blocks, the first bolts, the L-shaped connecting plates and the second bolts are arranged, so that the welding teeth are detachable, maintenance and replacement are convenient, and the connecting tightness is high.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic welding, in particular to an ultrasonic welding tooth structure. Background Art

[0002] The working principle of the ultrasonic metal welding machine is to use a transducer to convert electrical energy into high-frequency mechanical vibration energy. Under pressure, the two metal sheets (ear tab foils) to be welded are clamped between the welding head and the bottom mold. After the high-frequency vibration wave is transmitted to the surface of the upper metal sheet along the welding head, the welding head drives the upper metal sheet to vibrate at a high frequency, and the bottom mold fixes the lower metal sheet, thereby generating high-frequency friction between the two metal sheets. The molecules at the junction of the metal sheets penetrate each other and combine together to form a tight connection. At present, the traditional welding method of power batteries generally adopts the welding method of "ultrasonic pre-welding + ultrasonic final welding". The main purpose of ultrasonic pre-welding is to ensure that the welding ear tab foil is gathered and fixed without being scattered, and to prepare for the final welding after the battery cell is assembled. The requirements are relatively low, and the welding area is small, and large welding parameters are not required to meet the welding requirements. The main purpose of ultrasonic final welding is to connect the battery cell package ear foil and the positive and negative cover plates. The charging and discharging of the power battery has a large flow rate, and the required welding area will become larger. The residual tensile force detected after welding has high requirements.

[0003] In the existing device, the welding teeth at the bottom of the welding head are integrally formed, which is not convenient to disassemble and replace. The connection between the detachable welding teeth and the welding head is prone to loosening and the tightness is not high. The machine will be damaged during use, affecting the working process, increasing the maintenance cost, and the welding quality is poor. Therefore, we designed an ultrasonic welding tooth structure to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide an ultrasonic welding tooth structure to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An ultrasonic welding tooth structure, comprising an ultrasonic welding head and a plurality of welding teeth arranged on the surface of a welding head body, a mounting block is fixedly arranged on the surface of the welding head body on one side away from the welding teeth, the ultrasonic welding head comprises a horizontal part and a vertical part, one end of the horizontal part away from the vertical part is connected to a horn, the other end of the horn is connected to an ultrasonic generator, upper and lower end surfaces of the vertical part are respectively provided with mounting grooves for the mounting block to be embedded, the front side surface of the mounting block is provided with two groups of hole grooves, the bottom wall of the hole groove is provided with a first plug hole for a first bolt to pass through, and the bottom wall of the mounting groove is provided with a hole hole for the first bolt to pass through. A first screw hole is matched, and a first washer is sleeved on the outside of the threaded part of the first bolt. Two groups of L-shaped connecting plates are symmetrically provided at the front ends of the upper and lower side surfaces of the mounting block, and the number of each group of L-shaped connecting plates is two. The L-shaped connecting plate includes an integrally formed vertical plate and a horizontal plate. The vertical plate is connected to the outer surface of the mounting block. A card slot is provided at the notch of the mounting groove for the vertical plate to be embedded. A second insertion hole for the second bolt to pass through is penetrated on the horizontal plate. A second screw hole matching the second bolt is provided on the outer surface of the vertical part, and a second washer is sleeved on the outside of the threaded part of the second bolt.

[0007] As a preferred solution of the utility model: a plurality of the welding teeth are distributed on the surface of the welding head body in a rectangular array structure, and the welding teeth include a truncated cone-shaped base and a hemispherical portion, the larger end of the base is connected to the welding head body, and the smaller end of the base is connected to the hemispherical portion.

[0008] As a further preferred solution of the utility model: a connecting screw hole is provided at one end of the horizontal portion away from the vertical portion.

[0009] As a further preferred solution of the utility model: the four edges of the working surface of the welding head body are respectively provided with rounded transition surfaces.

[0010] As a further preferred solution of the utility model: two groups of holes are symmetrically distributed on the left and right sides of the welding head body, the number of holes in each group is two, and the size of the holes is equal to the size of the first bolt head.

[0011] As a further preferred solution of the present invention: the size of the mounting block is larger than the size of the welding head body.

[0012] As a further preferred solution of the present invention: the outer diameter of the first gasket is equal to the inner diameter of the hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The device is provided with a mounting block, a first bolt, an L-shaped connecting plate and a second bolt, so that the welding teeth are detachable for easy maintenance and replacement, and the welding teeth and the welding head are connected by the above-mentioned at least eight bolts to ensure the tightness of the connection. At the same time, each location is provided with a corresponding gasket for use, which can prevent the surface of the connected object from being scratched on the one hand, and prevent loosening on the other hand, further improve the tightness and improve the practicality of the device.

[0015] 2. This device sets the base of the welding tooth to be truncated cone-shaped and matched with a hemispherical part, which not only ensures the ability to penetrate the weldment, but also because the top is a hemispherical part, it is not easy to damage the surface welding; the welding print area is composed of multiple welding teeth, ensuring that the pressure and amplitude of each welding tooth are uniform and stable, and a single welding tooth will not be damaged due to local wear, thereby improving the service life and ensuring the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded view of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model from another viewing angle;

[0018] Figure 3 for Figure 1 The enlarged view of point A in the middle;

[0019] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0020] Figure 5 for Figure 3 Enlarged view of point C in the middle.

[0021] Wherein: 1-ultrasonic welding head, 2-horizontal part, 3-connecting screw hole, 4-vertical part, 6-second plug hole, 7-second screw hole, 8-second washer, 9-second bolt, 10-first screw hole, 11-L-shaped connecting plate, 12-mounting block, 13-rounded transition surface, 14-first bolt, 15-first washer, 16-welding head body, 17-mounting groove, 18-slot mouth, 19-first plug hole, 20-hole groove, 21-base, 22-hemispherical part, 23-welding teeth. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figure 1-5 In an embodiment of the utility model, an ultrasonic welding tooth structure includes an ultrasonic welding head 1 and a plurality of welding teeth 23 arranged on the surface of a welding head body 16. A mounting block 12 is fixedly provided on the surface of the welding head body 16 away from the welding teeth 23. The ultrasonic welding head 1 includes a horizontal portion 2 and a vertical portion 4. One end of the horizontal portion 2 away from the vertical portion 4 is connected to a horn, and the other end of the horn is connected to an ultrasonic generator. The welding device causes the foil and the composite current collector to rub against each other and fuse together through ultrasonic vibration. The horn can amplify the particle displacement or velocity of the mechanical vibration and concentrate the ultrasonic energy on a smaller area to achieve energy concentration. The horn and the ultrasonic generator are both conventional equipment in the field and are related to the present application, but are not the innovative points of the present application, so they are not explained in detail and are not shown in the figure.

[0024] A connecting screw hole 3 is formed at one end of the horizontal portion 2 away from the vertical portion 4 , and the connecting screw hole 3 is used for threaded connection with the horn.

[0025] The upper and lower end surfaces of the vertical portion 4 are respectively provided with mounting grooves 17 for the mounting block 12 to be embedded. The size of the mounting block 12 is larger than the size of the welding head body 16. The front side surface of the mounting block 12 is provided with two groups of hole grooves 20. The inner bottom wall of the hole groove 20 is provided with a first insertion hole 19 for the first bolt 14 to pass through. The inner bottom wall of the mounting groove 17 is provided with a first screw hole 10 that matches the first bolt 14. The two groups of hole grooves 20 are symmetrically distributed on the left and right sides of the welding head body 16. The number of each group of hole grooves 20 is two, and the size of the hole groove 20 is equal to the size of the head of the first bolt 14. When in use, when the first bolt 14 is screwed into the corresponding first screw hole 10, the head of the first bolt 14 completely enters the corresponding hole groove 20. In addition, the first washer 15 is sleeved on the outside of the threaded portion of the first bolt 14, and the outer diameter of the first washer 15 is equal to the inner diameter of the hole groove 20.

[0026] Two groups of L-shaped connecting plates 11 are symmetrically provided at the front ends of the upper and lower side surfaces of the mounting block 12, and the number of each group of L-shaped connecting plates 11 is two. The L-shaped connecting plates 11 include an integrally formed vertical plate and a horizontal plate. The vertical plate is connected to the outer surface of the mounting block 12. A card slot 18 for the vertical plate to be embedded is provided at the notch of the mounting groove 17. A second insertion hole 6 for the second bolt 9 to pass through is provided on the horizontal plate. A second screw hole 7 matching the second bolt 9 is provided on the outer surface of the vertical portion 4, and a second washer 8 is sleeved on the outside of the threaded portion of the second bolt 9.

[0027] The four edges of the working surface of the welding head body 16 are respectively provided with rounded transition surfaces 13. The device adds rounded transitions in the welding print area and the non-welding print area, with small deformation, ensuring that the welding surface is free of damage and cracks, and improving the welding quality.

[0028] A plurality of welding teeth 23 are distributed on the surface of the welding head body 16 in a rectangular array structure. The welding teeth 23 include a truncated cone-shaped base 21 and a hemispherical portion 22. The larger end of the base 21 is connected to the welding head body 16, and the smaller end of the base 21 is connected to the hemispherical portion 22. The device sets the base 21 of the welding tooth 23 to be truncated cone-shaped and matched with the hemispherical portion 22, which not only ensures the ability to penetrate the weldment, but also does not easily damage the surface welding because the top is the hemispherical portion 22. The welding print area is composed of a plurality of welding teeth 23, which ensures that the pressure and amplitude of each welding tooth 23 are uniform and stable, and a single welding tooth 23 will not be damaged due to local wear, thereby improving the service life and ensuring the welding quality.

[0029] In addition, the device is provided with a mounting block 12, a first bolt 14, an L-shaped connecting plate 11 and a second bolt 9, so that the welding tooth is detachable for easy maintenance and replacement, and the welding tooth and the welding head are connected by the above-mentioned at least eight bolts to ensure the tightness of the connection. At the same time, each location is provided with a corresponding gasket for use, which can prevent the surface of the connected object from being scratched on the one hand, and prevent loosening on the other hand, thereby further improving the tightness and improving the practicality of the device.

[0030] It should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An ultrasonic welding tooth structure, comprising an ultrasonic welding head (1) and a plurality of welding teeth (23) arranged on the surface of a welding head body (16); characterized in that: A mounting block (12) is fixedly provided on the surface of the welding head body (16) on the side away from the welding teeth (23); the ultrasonic welding head (1) comprises a horizontal portion (2) and a vertical portion (4); one end of the horizontal portion (2) away from the vertical portion (4) is connected to the amplitude change rod; the other end of the amplitude change rod is connected to the ultrasonic generator; the upper and lower end surfaces of the vertical portion (4) are respectively provided with mounting grooves (17) for the mounting block (12) to be embedded; the front side surface of the mounting block (12) is provided with two groups of hole grooves (20); the inner bottom wall of the hole groove (20) is provided with a first insertion hole (19) for the first bolt (14) to pass through; the inner bottom wall of the mounting groove (17) is provided with a first screw hole (10) matched with the first bolt (14); The threaded portion of the first bolt (14) is sleeved with a first washer (15). Two groups of L-shaped connecting plates (11) are symmetrically arranged at the front ends of the upper and lower surfaces of the mounting block (12). The number of each group of L-shaped connecting plates (11) is two. The L-shaped connecting plates (11) include an integrally formed vertical plate and a horizontal plate. The vertical plate is connected to the outer surface of the mounting block (12). A slot (18) for the vertical plate to be embedded is provided at the notch of the mounting groove (17). A second insertion hole (6) for the second bolt (9) to pass through is provided on the horizontal plate. A second screw hole (7) for matching with the second bolt (9) is provided on the outer surface of the vertical portion (4). A second washer (8) is sleeved with the threaded portion of the second bolt (9).

2. The ultrasonic welding tooth structure according to claim 1, characterized in that: The plurality of welding teeth (23) are distributed on the surface of the welding head body (16) in a rectangular array structure, and the welding teeth (23) include a truncated cone-shaped base (21) and a hemispherical portion (22), wherein the larger end of the base (21) is connected to the welding head body (16), and the smaller end of the base (21) is connected to the hemispherical portion (22).

3. The ultrasonic welding tooth structure according to claim 2, characterized in that: A connecting screw hole (3) is provided at one end of the horizontal portion (2) away from the vertical portion (4).

4. The ultrasonic welding tooth structure according to claim 3, characterized in that: Four edges of the working surface of the welding head body (16) are respectively provided with rounded transition surfaces (13).

5. The ultrasonic welding tooth structure according to claim 4, characterized in that: The two groups of holes (20) are symmetrically distributed on the left and right sides of the welding head body (16), and the number of holes (20) in each group is two. The size of the holes (20) is equal to the size of the head of the first bolt (14).

6. The ultrasonic welding tooth structure according to claim 1, characterized in that: The size of the mounting block (12) is larger than the size of the welding head body (16).

7. An ultrasonic welding tooth structure according to claim 6, characterized in that: The outer diameter of the first gasket (15) is equal to the inner diameter of the hole groove (20).

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