Ultrasonic boring tool head and ultrasonic boring device

Abstract

The utility model relates to an ultrasonic boring tool head and an ultrasonic boring device. The ultrasonic boring tool head comprises a fixing part, a boring part and a guiding part which are sequentially arranged in the axial direction. The fixing part is provided with an end face used for being fixedly connected with an ultrasonic amplitude-change pole. The boring part is used for stretching into a to-be-bored workpiece for boring; the guide part comprises a first guide side surface and a second guide side surface; the first guide side surface is an integrated extension of the side surface of the boring part; the second guide side face is gradually inclined towards the first guide side face from the boring part in the direction away from the boring part. According to the utility model, the workpiece to be bored can be bored and repaired by utilizing ultrasonic energy.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic welding, in particular to an ultrasonic boring tool head and an ultrasonic boring device for boring holes before welding. Background Art

[0002] At present, with the widespread application of ultrasonic welding technology in various industries, ultrasonic tool heads of various shapes and wavelengths have also emerged, but they still encounter various limitations in actual production applications. For example, for the spot bottom welding of cylindrical battery cells, the welding tool head needs to be inserted from the center hole of the cylindrical battery cell into the bottom of the battery cell for welding, but in actual operation, since the center hole of the battery cell is usually small and almost becomes an ellipse or irregular shape after winding, it is difficult for the welding tool head to insert into the bottom of the battery cell and accurately complete the welding.

[0003] Therefore, before ultrasonic welding is performed on a workpiece such as a cylindrical battery cell that requires spot bottom welding, it is necessary to provide a technical solution that can process and repair the holes of the workpiece. Utility Model Content

[0004] The purpose of the utility model is to disclose an ultrasonic boring tool head, which can at least be used to bore and repair a workpiece to be bored, so that the welding tool head in the subsequent welding process can smoothly extend into the interior of the workpiece to be bored and accurately complete the welding; at the same time, the utility model correspondingly discloses an ultrasonic boring device.

[0005] In order to achieve the above objectives, the utility model is implemented through the following technical solutions:

[0006] An ultrasonic boring tool head comprises a fixing portion, a boring portion and a guide portion which are arranged in sequence along the axial direction; wherein the fixing portion has an end face for fixedly connecting to an ultrasonic horn so as to input ultrasonic energy transmitted along the axial direction; the boring portion is used to extend into a workpiece to be bored and perform boring using the radial vibration energy of ultrasonic waves; the guide portion comprises a first guide side surface and a second guide side surface, the first guide side surface being an integral extension of the side surface of the boring portion; the second guide side surface is arranged from the boring portion along a direction away from the boring portion, gradually tilted toward the first guide side surface.

[0007] As a preferred solution, the second guiding side surface is wedge-shaped.

[0008] As a preferred solution, the end of the first guide side surface is arc-shaped.

[0009] As a preferred solution, a positioning boss is provided on the end face of the fixing portion, a threaded hole extending to the inside of the fixing portion is axially provided inside the positioning boss, and the threaded hole is used for fixed connection with the ultrasonic horn via a screw.

[0010] As a preferred solution, the fixing portion is cylindrical as a whole, and the positioning boss is annular as a whole.

[0011] As a preferred solution, a positioning groove for clamping by an installation tool is provided on the outer peripheral side surface of the fixing portion.

[0012] As a preferred solution, it also includes a transition portion axially arranged between the fixing portion and the boring portion; the transition portion and the fixing portion are connected by a circular arc transition, and the transition portion and the boring portion are connected by a circular arc transition.

[0013] As a preferred solution, the workpiece to be bored is a cylindrical battery core; and the boring portion is overall in the shape of an elongated cylinder.

[0014] The utility model discloses an ultrasonic boring device, which comprises an ultrasonic generator, an ultrasonic transducer, an ultrasonic amplitude transformer, and an ultrasonic boring tool head as described in any one of the above schemes, and the four are connected in sequence.

[0015] As a preferred solution, a fixing flange for connecting to the outside is installed on the outer peripheral side wall of the ultrasonic horn.

[0016] The beneficial effects of the utility model include at least: the fixing part can input ultrasonic energy transmitted along the axial direction by connecting with the ultrasonic horn, and the boring part can extend into the workpiece to be bored, and use the radial vibration energy of the ultrasonic wave to bore; thereby realizing the boring processing and repair of the workpiece to be bored, such as the center hole of a cylindrical battery cell, so that the center hole is enlarged and rounded, so that the welding tool head in the subsequent welding process can smoothly extend into the bottom of the battery cell and accurately complete the welding. Among them, the second guide side surface of the guide part is gradually inclined toward the first guide side surface, which can make the boring part more smoothly extend into the center hole of the battery cell; the first guide side surface of the guide part is an integrated extension of the side surface of the boring part, which can ensure that the boring effect of the center hole remains integrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1It is a schematic diagram of the planar structure of an ultrasonic boring tool head disclosed in an embodiment.

[0019] Figure 2 It is a three-dimensional structural schematic diagram of an ultrasonic boring tool head disclosed in an embodiment.

[0020] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0021] Figure 4 It is a structural schematic diagram of an ultrasonic boring device disclosed in an embodiment.

[0022] Figure identification: 100-ultrasonic boring tool head, 110-fixing part, 111-end face of the fixing part, 112-positioning boss, 113-threaded hole, 114-positioning groove, 120-transition part, 130-boring part, 140-guide part, 141-first guide side, 142-second guide side; 200-ultrasonic amplitude transformer, 300-ultrasonic transducer, 400-ultrasonic generator, 500-fixing flange. DETAILED DESCRIPTION

[0023] In order to make the purpose, features and advantages of the invention of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model. Obviously, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] Unless otherwise clearly specified and limited, the terms "connection", "fixation" and "setting" 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, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features, unless otherwise clearly and specifically defined.

[0027] See also Figures 1 to 3 The present embodiment discloses an ultrasonic boring tool head 100, comprising a fixing portion 110, a boring portion 130 and a guide portion 140 which are sequentially arranged along the axial direction; wherein the fixing portion 110 has an end surface 111 for fixedly connecting with the ultrasonic horn 200 to input ultrasonic energy transmitted along the axial direction; the boring portion 130 is used to extend into a workpiece to be bored (not shown) and perform boring by using the radial vibration energy of ultrasonic waves; the guide portion 140 comprises a first guide side surface 141 and a second guide side surface 142, wherein the first guide side surface 141 is an integral extension of the side surface of the boring portion 130; the second guide side surface 142 is inclined from the boring portion 130 along a direction away from the boring portion 130, gradually toward the first guide side surface 141.

[0028] The present embodiment preferably uses ultrasonic waves with a frequency range of 20KHz-60KHz. When the ultrasonic waves are transmitted along the axial direction of the boring tool head 100, a vibration energy that causes the amplitude to change alternately (refer to the amplitude of a sine wave) is provided along the radial direction of the boring tool head 100, so that the diameter of the boring tool head 100 alternately increases and decreases when vibrating, thereby enabling the boring part 130 to process or repair the hole of the workpiece to be bored.

[0029] To facilitate the introduction of the application and advantages of this embodiment, the workpiece to be bored is introduced by taking a cylindrical battery cell as an example, but in other implementation examples, it may not be limited to a cylindrical battery cell.

[0030] Therefore, in this embodiment, the fixing part 110 can input ultrasonic energy transmitted in the axial direction through the connection with the ultrasonic horn 200, and the boring part 130 can extend into the center hole of the cylindrical battery cell, and use the radial vibration energy of the ultrasonic wave to bore the hole, so that the center hole is enlarged and rounded, so that the welding tool head in the subsequent welding process can smoothly extend into the bottom of the battery cell and accurately complete the welding. Among them, the second guide side surface 142 of the guide part 140 is gradually inclined toward the first guide side surface 141, so that the boring part 130 can smoothly extend into the center hole; the first guide side surface 141 of the guide part 140 is an integrated extension of the side surface of the boring part 130, which can ensure that the boring effect of the center hole remains integrated, that is, the center hole remains the same width and coordinated from top to bottom.

[0031] In this embodiment, the second guide side surface 142 is specifically wedge-shaped, which can facilitate the boring portion 130 to extend into the center hole of the battery cell.

[0032] As an optimized design, in this embodiment, the end of the first guide side surface 141 is arc-shaped, which can prevent the end from piercing the edge foil.

[0033] In this embodiment, a positioning boss 112 is provided on the end surface of the fixing portion 110, and a threaded hole 113 extending to the inside of the fixing portion 110 is provided axially inside the positioning boss 112, and the threaded hole 113 is used to be fixedly connected with the ultrasonic horn 200 by a screw. The positioning boss 112 makes it more convenient and efficient to connect the fixing portion 110 with the ultrasonic horn by a screw.

[0034] In this embodiment, the fixing portion 110 is cylindrical in shape, the positioning boss 112 is annular in shape, and the boring portion 130 is elongated cylindrical in shape, so as to be suitable for boring, processing and repairing the center hole of a cylindrical battery cell.

[0035] To facilitate installation, in this embodiment, a positioning groove 114 for clamping by an installation tool is provided on the outer peripheral side of the fixing portion 110 , wherein the installation tool may be a clamping tool such as a wrench.

[0036] In addition, the present embodiment further includes a transition portion 120 disposed axially between the fixing portion 140 and the boring portion 130; the transition portion 120 and the fixing portion 110 are connected by a circular arc transition, and the transition portion 120 and the boring portion 130 are also connected by a circular arc transition. By designing the circular arc transition connection, the ultrasonic wave can be smoothly transmitted from the fixing portion 140 to the boring portion 130, avoiding stress concentration and lower rigidity due to the rapid change of the node surface, and also having the function of ultrasonic energy focusing.

[0037] See also Figure 4 The present embodiment also discloses an ultrasonic boring device, which includes an ultrasonic generator 400, an ultrasonic transducer 300, an ultrasonic amplitude transformer 200, and an ultrasonic boring tool head 100 of any of the above schemes, which are connected in sequence.

[0038] By using the ultrasonic boring device, the radial vibration energy of the ultrasonic wave can be used for boring, so that the center hole of the cylindrical battery cell can be enlarged and rounded, so that the welding tool head in the subsequent welding process can smoothly extend into the bottom of the battery cell and accurately complete the welding.

[0039] At the same time, a fixing flange 500 for connecting to the outside is installed on the outer peripheral side wall of the ultrasonic horn 200, so as to facilitate the fixing of the ultrasonic transducer 300, the ultrasonic horn 200 and the ultrasonic boring tool head 100 as a whole.

[0040] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An ultrasonic boring tool head, characterized in that: It comprises a fixing portion, a boring portion and a guiding portion which are sequentially arranged along the axial direction; wherein the fixing portion has an end face for fixedly connecting with an ultrasonic horn so as to input ultrasonic energy transmitted along the axial direction; the boring portion is used to extend into a workpiece to be bored and perform boring using the radial vibration energy of ultrasonic waves; the guiding portion comprises a first guiding side surface and a second guiding side surface, wherein the first guiding side surface is an integral extension of the side surface of the boring portion; and the second guiding side surface is gradually inclined from the boring portion in a direction away from the boring portion toward the first guiding side surface.

2. The ultrasonic boring tool head according to claim 1, characterized in that: The second guiding side surface is wedge-shaped.

3. The ultrasonic boring tool head according to claim 1, characterized in that: The end of the first guide side surface is in an arc shape.

4. The ultrasonic boring tool head according to claim 1, characterized in that: The end surface of the fixing portion is provided with a positioning boss, and the interior of the positioning boss is provided with a threaded hole extending to the interior of the fixing portion along the axial direction, and the threaded hole is used for fixed connection with the ultrasonic horn via a screw.

5. The ultrasonic boring tool head according to claim 4, characterized in that: The fixing portion is cylindrical in shape as a whole, and the positioning boss is annular in shape as a whole.

6. The ultrasonic boring tool head according to claim 4, characterized in that: The outer peripheral side surface of the fixing portion is provided with a positioning groove for clamping by an installation tool.

7. The ultrasonic boring tool head according to any one of claims 1 to 6, characterized in that: It also includes a transition portion axially arranged between the fixing portion and the boring portion; the transition portion is connected to the fixing portion by a circular arc transition, and the transition portion is connected to the boring portion by a circular arc transition.

8. The ultrasonic boring tool head according to claim 7, characterized in that: The workpiece to be bored is a cylindrical battery core; the boring portion is in the shape of an elongated cylinder as a whole.

9. An ultrasonic boring device, characterized in that: It comprises an ultrasonic generator, an ultrasonic transducer and an ultrasonic amplitude transformer, and an ultrasonic boring tool head as described in any one of claims 1 to 8, which are connected in sequence.

10. The ultrasonic boring device according to claim 9, characterized in that: A fixing flange for connecting with the outside is installed on the outer peripheral side wall of the ultrasonic horn.

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