Ultrasonic puncture welding head and welding structure

Abstract

The utility model provides an ultrasonic puncture welding head and a welding structure, and belongs to the technical field of ultrasonic puncture welding. The problem that a plate with the wall thickness smaller than 3.5 mm and another plate cannot be connected together through existing ultrasonic puncture welding is solved. The ultrasonic puncture welding head comprises a welding column, a tooth head and a groove. According to the utility model, the ultrasonic tooth head is adopted to melt the bulge, so that the tooth head can be prevented from extending into the outer plate, the situation that the outer plate is penetrated by the tooth head in a welding manner or the surface of the outer plate is melted and deformed due to the fact that the tooth head extends into the outer plate is avoided, and in addition, when people manufacture the outer plate, the thickness of the outer plate can be reduced, namely, the thickness of the outer plate is reduced. By means of the welding structure, the outer plate and the inner plate which are small in thickness can be connected together, and the manufacturing cost of the outer plate can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultrasonic puncture welding and relates to an ultrasonic puncture welding head and a welding structure. Background Art

[0002] At present, the common ultrasonic piercing welding technology on the market is to pass the welding head through the first plate and then extend it into the second plate. In this process, the welding discharge generated by the welding head extending into the second plate and the second plate being acted upon by ultrasonic waves will melt and flow between the second plate and the first plate, thereby achieving a connection between the first plate and the second plate. The use of this ultrasonic piercing welding technology requires the use of a second plate with a wall thickness of more than 3.5 mm. Otherwise, the surface of the second plate will have welding marks due to the ultrasonic effect on the welding head. As a result, the ultrasonic piercing welding technology will not be suitable for a second plate with a wall thickness of less than 3.5 mm. Summary of the invention

[0003] The utility model aims to solve the above problems in the prior art and proposes an ultrasonic puncture welding head and a welding structure which can connect a plate with a wall thickness of less than 3.5 mm with another plate.

[0004] The purpose of the utility model can be achieved through the following technical solutions: an ultrasonic puncture welding head, comprising:

[0005] A welding column, wherein a plurality of tooth heads are arranged at one end of the welding column, and an end surface of each tooth head is inwardly recessed to form a groove.

[0006] In the above-mentioned ultrasonic puncture welding head, each of the tooth heads is integrally formed with the welding column.

[0007] In the above-mentioned ultrasonic puncture welding head, there is a gap between two adjacent tooth heads.

[0008] In the above-mentioned ultrasonic puncture welding head, the end surfaces of each tooth head away from the welding column are flush with each other.

[0009] A welding structure comprises: an inner plate, an outer plate and the tooth head and groove of the ultrasonic puncture welding head. The inner plate and the outer plate are stacked and arranged, and the tooth head can extend into the inner plate. A plurality of protrusions corresponding to the grooves are arranged on one side of the inner plate facing the outer plate.

[0010] In the above-mentioned welding structure, a welding groove for accommodating the protrusion is provided on the side surface of the inner plate facing the outer plate.

[0011] In the above-mentioned welding structure, the groove is located directly above the corresponding protrusion.

[0012] In the above-mentioned welding structure, the cross-sectional shape of the groove is an arc shape.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. In the present invention, ultrasonic tooth heads are used to melt the protrusions, which can prevent the tooth heads from extending into the outer plate, so as to prevent the outer plate from being welded through by the tooth heads or the surface of the outer plate from melting and deforming due to the tooth heads extending into the outer plate. In addition, when making the outer plate, the thickness of the outer plate can be reduced, that is, the welding structure can connect the outer plate with a smaller thickness to the inner plate, which can also reduce the production cost of the outer plate.

[0015] 2. When the welding head extends into the inner plate and the tooth head generates ultrasonic waves, since a groove with an arc-shaped cross-section is provided at the end face of the tooth head, the groove will be located just above the protrusion, thereby increasing the area of ​​the end face of the tooth head. In other words, the area of ​​the tooth head located directly above the protrusion is increased, thereby increasing the ultrasonic waves at the tooth head located at the groove, and then improving the melting efficiency of the protrusion, so that the melted material of the protrusion can quickly and smoothly fill the gap, so that the outer plate and the inner plate can be smoothly bonded together. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an ultrasonic puncture welding head.

[0017] Figure 2 yes Figure 1 Section view at AA.

[0018] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0019] Figure 4 It is a structural schematic diagram of the welding structure in the second embodiment.

[0020] Figure 5 yes Figure 4 Cross-sectional view at CC.

[0021] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure at D in the middle.

[0022] Figure 7 It is a schematic diagram of the structure in which the tooth head extends into the inner plate. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] Embodiment 1

[0025] like Figure 1 — Figure 3 As shown, an ultrasonic puncture welding head of the utility model includes a welding column 100, a tooth head 110 and a groove 111.

[0026] A plurality of tooth heads 110 are provided at one end of the welding column 100. Specifically, the plurality of tooth heads 110 in the utility model are arranged in two rows of tooth head groups, each row of tooth head groups has a plurality of tooth heads 110, and the end surface of each of the tooth heads 110 is recessed inward to form a groove 111, and each of the tooth heads 110 is integrally formed with the welding column 100. In this way, the ultrasonic welding of the welding head to the object can be effectively accelerated. There is a gap 120 between two adjacent tooth heads 110, and the end surfaces of each of the tooth heads 110 away from the welding column 100 are flush with each other. Therefore, when one end of the welding head having the tooth heads 110 contacts a planar object, each of the tooth heads 110 can touch the object at the same time, thereby ensuring that the welding head can work stably.

[0027] Embodiment 2

[0028] like Figure 4 — Figure 7 As shown, this embodiment applies the ultrasonic puncture welding head in the first embodiment to the welding of the inner plate 200 and the outer plate 300 .

[0029] Specifically, a welding structure includes: an inner plate 200, an outer plate 300, and the tooth head 110 and the groove 111 of the ultrasonic puncture welding head. The inner plate 200 and the outer plate 300 are stacked and arranged, and the tooth head 110 can extend into the inner plate 200. A plurality of protrusions 210 corresponding to the grooves 111 are provided on one side of the inner plate 200 facing the outer plate 300, and a welding groove 220 for accommodating the protrusions is provided on one side of the inner plate facing the outer plate, and the groove 111 is located directly above the corresponding protrusion 210. Before welding the inner plate 200 and the outer plate 300, the outer plate 300 and the inner plate 200 need to be placed on a tooling (not marked in the figure) suitable for the welding structure to achieve the positioning and installation of the outer plate 300 and the inner plate 200. After that, the mobile device (such as a robot) used to connect the welding head is programmed so that the mobile device moves each tooth head 110 of the welding head to the top of the corresponding protrusion 210, and then the lower end face of the tooth head 110 is pressed against the side face of the inner plate 200 away from the outer plate 300. During operation, ultrasonic waves are generated on one end face of the tooth head 110 having the groove 111. During this process, the mobile device drives the tooth head 110 and the welding column 100 to descend until the tooth head 110 is inserted into the inner plate 200 to a predetermined depth and stays for a certain period of time. After that, the mobile device pulls out the welding head and transfers it to the next station. During this process, the ultrasonic waves generated by the tooth head 110 will also act on the protrusion 210. Since the end face of the tooth head 110 is provided with a groove 111 with a circular arc cross-section, the groove 11 1 will also be located just above the protrusion 210, thereby increasing the area of ​​the end face of the tooth head 110. Further, the area of ​​the tooth head 110 located just above the protrusion 210 is increased, thereby increasing the ultrasonic wave of the tooth head 110 located at the groove 111, thereby improving the melting efficiency of the protrusion 210, and allowing the melted material of the protrusion 210 to flow quickly and smoothly around the protrusion, thereby increasing the contact area between the melted protrusion and the outer panel, ensuring that the outer panel 300 and the inner panel 200 can be smoothly bonded together.

[0030] Furthermore, by using an ultrasonic tooth head 110 to melt the protrusion 210, it is possible to prevent the tooth head 110 from extending into the outer panel 300, thereby preventing the outer panel 300 from being welded through by the tooth head 110 or causing the surface of the outer panel 300 to melt and deform due to the tooth head 110 extending into the outer panel 300. In addition, when manufacturing the outer panel 300, the thickness of the outer panel 300 can be reduced, that is, the welding structure can connect the outer panel 300 with a wall thickness of less than 3.5 mm to the inner panel 200, which can also reduce the manufacturing cost of the outer panel 300.

[0031] As a further optimization of the present invention, the tooling selected for the present invention can be a tooling plate (not marked in the figure) fixed on a horizontal plane, the top surface shape of the tooling plate is the same as the shape of the side surface of the outer panel away from the inner panel, so that the tooling plate can fit with the outer panel, and a plurality of offset rods (not marked in the figure) are provided on the tooling plate, which can surround the outer panel and the inner panel to prevent the inner panel and the outer panel from being dislocated and moving on the tooling plate.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An ultrasonic puncture welding head, characterized in that: include: A welding column, wherein a plurality of tooth heads are arranged at one end of the welding column, and an end surface of each tooth head is inwardly recessed to form a groove.

2. The ultrasonic puncture welding head according to claim 1, characterized in that: Each of the tooth heads is integrally formed with the welding column.

3. The ultrasonic puncture welding head according to claim 1, characterized in that: There is a gap between two adjacent tooth heads.

4. The ultrasonic puncture welding head according to claim 1, characterized in that: The end surfaces of the tooth heads away from the welding column are flush with each other.

5. A welding structure, characterized in that: include: The inner plate, the outer plate and the tooth head and the groove of the ultrasonic puncture welding head according to any one of claims 1 to 4, the inner plate and the outer plate are stacked, the tooth head can extend into the inner plate, and the inner plate is provided with a plurality of protrusions corresponding to the grooves on one side facing the outer plate.

6. A welding structure according to claim 5, characterized in that: A welding groove for accommodating the protrusion is provided on one side of the inner plate facing the outer plate.

7. A welding structure according to claim 6, characterized in that: The groove is located directly above the corresponding protrusion.

8. A welding structure according to claim 5, characterized in that: The cross-sectional shape of the groove is an arc shape.

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