Ultrasonic sub-welding head

Abstract

This invention proposes an ultrasonic welding head, comprising a female welding head and multiple female welding heads. The top surface of the female welding head has multiple reference grooves. The multiple female welding heads are threaded to the top surface of the female welding head and arranged in an irregular closed curve shape. Each female welding head includes a main body, a clamping part, and a welding head. The main body is cylindrical, and its outer wall has a positioning groove at its bottom. The clamping part connects the main body and the welding head at both ends, and has a flat clamping surface. The top surface of the welding head has an arc-shaped welding surface, with the arc-shaped ends of the welding head extending beyond the edge of the clamping part. The centerline of the welding surface formed by the assembled top surfaces of the multiple female welding heads is a continuous smooth curve. By using the multiple reference grooves on the top surface of the female welding head and the positioning grooves at the bottom of the outer wall of the main body, the positioning grooves of the multiple female welding heads are aligned one-to-one with the multiple reference grooves, enabling one-time welding of complex, irregularly shaped products and improving welding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic welding technology, and in particular to an ultrasonic welding head. Background Technology

[0002] Ultrasonic welding utilizes high-frequency vibration waves transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces rub against each other, causing fusion between molecular layers. To improve welding efficiency, a master-slave welding head has been proposed, which can perform multi-point welding simultaneously, eliminating the need for individual point operations, significantly improving production efficiency and reducing labor costs.

[0003] Existing welding heads can only weld multiple weld points of regular shapes. If a complex structure with an irregular shape is encountered, it cannot be welded in one go. If welding is done in multiple stages, the welding cycle will be long. Utility Model Content

[0004] In view of this, the present invention proposes an ultrasonic welding head to solve the technical problem mentioned in the background art that if an irregularly shaped and complex structure product is encountered, it is impossible to weld it in one go, and if it is welded in multiple times, the welding cycle is long.

[0005] The technical solution of this utility model is implemented as follows: This utility model provides an ultrasonic welding head, comprising a female welding head and multiple female welding heads, wherein: The top surface of the female welding head is provided with multiple reference grooves; Multiple sub-welding heads are threaded to the top surface of the female welding head and arranged in an irregular closed curve shape. Each sub-welding head includes a main body, a clamping part, and a welding head. The main body is cylindrical, and the bottom of the outer wall of the main body is provided with a positioning groove. The positioning grooves of the multiple sub-welding heads are aligned with the multiple reference grooves one by one. The clamping part is connected to the main body and the welding head at both ends, and the clamping part is provided with a flat clamping surface. The top surface of the welding head is provided with an arc-shaped welding surface, and the two ends of the arc of the welding head extend beyond the edge of the clamping part. The center line of the welding surface formed by the top surfaces of the multiple sub-welding heads after assembly is a continuous smooth curve.

[0006] Based on the above technical solutions, preferably, the multiple sub-welding heads have different sizes and are calculated with counterweights to ensure stable welding output amplitude.

[0007] Based on the above technical solutions, preferably, the center line of the welding surface formed by the top surfaces of the assembled multiple sub-welding heads is heart-shaped.

[0008] Based on the above technical solutions, preferably, the female welding head is rectangular, and each of the four sides of the female welding head is provided with a waist-shaped groove, which is arranged along the height direction of the female welding head.

[0009] Based on the above technical solutions, preferably, the ratio of the length of the waist-shaped groove to the height of the female welding head is 0.65~0.75.

[0010] Based on the above technical solutions, preferably, the welding head includes a base and a welding nozzle, the bottom end of the base is connected to the clamping part, the welding nozzle is connected to the top end of the base, and the width of the welding nozzle is smaller than the width of the base.

[0011] Based on the above technical solutions, preferably, a transition surface is provided between the base and the clamping part.

[0012] Based on the above technical solutions, preferably, the arc-shaped welding surface is a single arc surface; or the arc-shaped welding surface is at least two arc surfaces, and the at least two arc surfaces are smoothly connected.

[0013] The ultrasonic welding head of this invention has the following advantages over the prior art: (1) The top surface of the female welding head is provided with multiple reference grooves; multiple female welding heads are threaded to the top surface of the female welding head and arranged in an irregular closed curve shape; the bottom of the outer wall of the main body is provided with positioning grooves, and the positioning grooves of the multiple female welding heads are aligned with the multiple reference grooves one by one, so as to realize the one-time welding of complex structure products with irregular shapes and improve welding efficiency. (2) By using multiple sub-welding heads with different sizes and after weight calculation, the welding output amplitude is stabilized, resonance is reduced, and welding quality is improved; (3) The center line of the welding surface formed by assembling multiple sub-welding heads is heart-shaped, which adapts to the heart shape of the product welding position, and the welding of the product can be completed in one go; (4) The female welding head is rectangular, and each of the four sides of the female welding head is provided with a waist-shaped groove. The waist-shaped groove is set along the height direction of the female welding head, so that the average value of the output amplitude is more uniform and stable. (5) By setting the ratio of the length of the waist-shaped groove to the height of the female welding head to 0.65~0.75, the above parameters ensure that the average value of the output amplitude is more uniform and stable, thereby improving the welding stability and reliability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a perspective view of the ultrasonic welding head in the embodiment of this utility model; Figure 2 This is a top view of the ultrasonic welding head in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of the female welding head in an embodiment of this utility model; Figure 4 This is a schematic diagram of the sub-welding head in an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached diagram: 1-Female welding head, 2-Female welding head; 11-Reference groove, 12-Threaded connection hole, 13-Oval groove; 21-Main body, 211-Positioning groove, 22-Clamping part, 221-Clamping surface, 23-Welding head, 231-Base, 232-Welding nozzle, 2321-Arc-shaped welding surface, 24-Transition curved surface. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0018] Reference Figures 1-4 As shown in the embodiment of this utility model, an ultrasonic welding head is provided, comprising a female welding head 1 and multiple female welding heads 2, wherein: The top surface of the female welding head 1 is provided with a plurality of reference grooves 11; the length direction of the reference grooves 11 is parallel to the top surface of the female welding head 1; the top surface of the female welding head 1 is provided with threaded connection holes 12. Multiple sub-welding heads 2 are threaded to the top surface of the female welding head 1 and arranged in an irregular closed curve shape. The sub-welding heads 2 are connected to the threaded connection hole 12. Each sub-welding head 2 includes a main body 21, a clamping part 22, and a welding head 23. The main body 21 is cylindrical, and the bottom of the outer wall of the main body 21 is provided with a positioning groove 211 of equal width to the reference groove 11. The positioning grooves 211 of the multiple sub-welding heads 2 are aligned one-to-one with the multiple reference grooves 11, and the edges of the positioning grooves 211 and the reference grooves 11 are aligned in the width direction. The clamping part 22 is connected to the main body 21 and the welding head 23 at both ends, and the clamping part 22 is provided with a flat clamping surface 221. The top surface of the welding head 23 is provided with an arc-shaped welding surface 2321, and the two ends of the arc of the welding head 23 extend out of the edge of the clamping part 22. The center line of the welding surface formed by the multiple sub-welding heads 2 after assembly is a continuous smooth curve.

[0019] The ultrasonic welding head proposed in this embodiment has multiple reference grooves 11 on the top surface of the female welding head 1; multiple female welding heads 2 are threaded to the top surface of the female welding head 1 and arranged in an irregular closed curve shape; the bottom of the outer wall of the main body 21 has a positioning groove 211, and the positioning grooves 211 of the multiple female welding heads 2 are aligned one-to-one with the multiple reference grooves 11 to achieve one-time welding of complex structure products with irregular shapes and improve welding efficiency.

[0020] In some embodiments, the multiple sub-welding heads 2 have different sizes and are weighted to ensure stable welding output amplitude. The weighting of the multiple sub-welding heads 2 corrects the vertical and horizontal amplitudes, and the frequency is corrected using specialized instruments, resulting in stable output amplitude and frequency on the welding surface of the welding head, minimal resonance, and guaranteed welding quality.

[0021] In some embodiments, the centerline of the welding surface formed by the top surfaces of the assembled sub-welding heads 2 is heart-shaped. By having the centerline of the welding surface formed by the assembled sub-welding heads 2 be approximately heart-shaped, the heart shape of the welding position on the product is adapted to the heart shape, allowing welding of the product to be completed in one operation. Of course, the centerline of the welding surface can also be other shapes, as long as it matches the shape of the product's welding position.

[0022] In some embodiments, the female welding head 1 is rectangular, and each of its four sides is provided with an oblong groove 13. Two oblong grooves 13 may be provided on each side, and the oblong grooves 13 are arranged along the height direction of the female welding head 1. By providing oblong grooves 13 on all four sides of the female welding head 1, and by arranging the oblong grooves 13 along the height direction of the female welding head 1, the average output amplitude becomes more uniform and stable.

[0023] In some embodiments, the ratio of the length of the waist-shaped groove 13 to the height of the female welding head 1 is 0.65 to 0.75. Finite element analysis revealed that these parameter settings ensure a more uniform and stable average output amplitude, thereby improving welding stability and reliability.

[0024] In some embodiments, the welding head 23 includes a base 231 and a welding nozzle 232. The bottom end of the base 231 is connected to the clamping part 22, and the welding nozzle 232 is connected to the top end of the base 231. The width of the welding nozzle 232 is smaller than the width of the base 231. By connecting the clamping part 22 and the welding nozzle 232 to both ends of the base 231 respectively, and reducing the width at the welding nozzle 232, the base 231 provides better support for the welding nozzle 232, thereby improving the reliability and stability of the device.

[0025] In some embodiments, a transition surface 24 is provided between the base 231 and the clamping part 22. By providing the transition surface 24, stress concentration at the connection between the base 231 and the clamping part 22 is avoided, thereby improving the reliability and stability of the device.

[0026] In some embodiments, the arc-shaped welding surface 2321 is a segment of an arc surface. The arc-shaped welding surface 2321 of the sub-welding head 2 may consist of only one segment of an arc surface, which is used in positions where the angle is small and the transition of the curved surface shape is relatively smooth.

[0027] In other embodiments, the arc-shaped welding surface 2321 consists of at least two arc-shaped segments that are smoothly connected. The arc-shaped welding surface 2321 of the sub-welding head 2 can be formed by at least two arc-shaped segments, the center and diameter of the at least two arc-shaped segments can be different, the at least two arc-shaped segments are smoothly connected, and there is a smooth transition with the arc-shaped welding surface 2321 of the adjacent sub-welding head 2. This method can be applied to positions with larger angles and more complex curved shapes.

[0028] The working principle of the ultrasonic welding head in this embodiment of the present invention is as follows: multiple sub-welding heads 2 are threadedly connected to the female welding head 1. By rotating the sub-welding heads 2, the positioning grooves 211 of the multiple sub-welding heads 2 are aligned one-to-one with the reference grooves 11. The center line of the welding surface formed by the top surface of the multiple sub-welding heads 2 after assembly is a continuous smooth curve, which is adapted to the shape of the welding position of the product, so as to realize the one-time welding of the complex structure of the irregular shape product and improve the welding efficiency.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultrasonic welding head, characterized in that, Includes a female welding head and multiple female welding heads, wherein: The top surface of the female welding head is provided with multiple reference grooves; Multiple sub-welding heads are threaded to the top surface of the female welding head and arranged in an irregular closed curve shape. Each sub-welding head includes a main body, a clamping part, and a welding head. The main body is cylindrical, and the bottom of the outer wall of the main body is provided with a positioning groove. The positioning grooves of the multiple sub-welding heads are aligned with the multiple reference grooves one by one. The clamping part is connected to the main body and the welding head at both ends, and the clamping part is provided with a flat clamping surface. The top surface of the welding head is provided with an arc-shaped welding surface, and the two ends of the arc of the welding head extend beyond the edge of the clamping part. The center line of the welding surface formed by the top surfaces of the multiple sub-welding heads after assembly is a continuous smooth curve.

2. The ultrasonic welding head as described in claim 1, characterized in that, The multiple sub-welding heads are of different sizes and are weighted to ensure stable welding output amplitude.

3. The ultrasonic welding head as described in claim 1, characterized in that, The centerline of the welding surface formed by the assembly of multiple sub-welding heads is heart-shaped.

4. The ultrasonic welding head as described in claim 1, characterized in that, The female welding head is rectangular, and each of the four sides of the female welding head is provided with a waist-shaped groove, which is arranged along the height direction of the female welding head.

5. The ultrasonic welding head as described in claim 4, characterized in that, The ratio of the length of the waist-shaped groove to the height of the female welding head is 0.65 to 0.

75.

6. The ultrasonic welding head as described in claim 1, characterized in that, The welding head includes a base and a welding nozzle. The bottom end of the base is connected to the clamping part, and the welding nozzle is connected to the top end of the base. The width of the welding nozzle is smaller than the width of the base.

7. The ultrasonic welding head as described in claim 6, characterized in that, A transition surface is provided between the base and the clamping part.

8. The ultrasonic welding head as described in any one of claims 1-7, characterized in that, The arc-shaped welding surface is a single arc surface; or the arc-shaped welding surface is at least two arc surfaces, and the at least two arc surfaces are smoothly connected.

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