Welding head structure and welding apparatus

Abstract

The application discloses a welding head structure and a welding device, and relates to the technical field of welding head structures, and aims to improve the stability of the welding head structure during welding by simplifying the connection relationship between the structures of the welding head, reducing the space occupation, and reducing the vibration mode.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic welding technology, and in particular to a welding head structure and a welding device using the welding head structure. Background Technology

[0002] Ultrasonic wire bonding machines are used in semiconductor packaging. The bonding head of the ultrasonic wire bonding machine is equipped with a wedge. Ultrasonic wire bonding technology is a method of bonding metal wires under the wedge to the chip and substrate through the combined action of ultrasonic mechanical vibration and mechanical pressure on the wedge.

[0003] The rectangular linkage mechanism on the welding head of the ultrasonic wire bonding machine is a key component. The function of transmitting ultrasonic mechanical vibration and welding pressure by the welding head needs to be realized through the rectangular linkage mechanism.

[0004] Existing rectangular linkage mechanisms typically have a connecting plate, which connects them to other components. This not only makes the rectangular linkage mechanism complex and space-consuming, but also results in various vibration modes for the ultrasonic mechanical vibration mechanism and pressure mechanism connected to the rectangular linkage mechanism, thus making the stability of the cutting tool poor during welding. Summary of the Invention

[0005] The main objective of this invention is to provide a welding head structure and welding equipment, which aims to reduce space occupation and vibration patterns by simplifying the connection relationships between the various structures of the welding head, while improving the stability of the welding head structure during welding.

[0006] To achieve the above objectives, the present invention proposes a welding head structure, the welding head structure comprising:

[0007] Welding head holder;

[0008] A rectangular linkage mechanism, comprising a movable block and a fixed block, wherein the fixed block is connected to the welding head seat, and the movable block is elastically connected to the fixed block;

[0009] An ultrasonic mechanism, comprising a transducer and a transducer base, wherein the transducer is disposed on the transducer base and the transducer base is connected to the movable block;

[0010] A cleaver connected to the transducer, the cleaver being used for mechanical vibration welding via ultrasonic waves;

[0011] A pressure mechanism is provided on the welding head seat and connected to the movable block, and the pressure mechanism is used to apply pressure to the chopping blade;

[0012] A wire feeding mechanism, connected to the transducer base and disposed adjacent to the chopping blade, is used to feed a metal wire to the chopping blade; and

[0013] A cutting mechanism is provided on the welding head seat and adjacent to the cleaver, and the cutting mechanism is used to cut the metal wire.

[0014] In one embodiment, the rectangular linkage mechanism further includes an elastic plate, the fixed block has a first mounting surface, the movable block has a second mounting surface, one end of the elastic plate is connected to the first mounting surface, and the other end of the elastic plate is connected to the second mounting surface, so that the fixed block and the movable block are elastically connected.

[0015] In one embodiment, the rectangular linkage mechanism includes a plurality of the elastic plates;

[0016] The fixed block has multiple spaced first mounting surfaces, and the movable block has multiple second mounting surfaces corresponding to the multiple first mounting surfaces. The two ends of each elastic piece are connected to one first mounting surface and one second mounting surface, so that the multiple elastic pieces are opposite to each other and spaced apart.

[0017] In one embodiment, the rectangular linkage mechanism further includes multiple fixing modules, each of the elastic plates being connected to two fixing modules, the two fixing modules being spaced apart at both ends of the elastic plate, one of the two fixing modules being used to fix the elastic plate and the fixing block, and the other of the two fixing modules being used to fix the elastic plate and the movable block.

[0018] In one embodiment, the fixing module includes a fixing plate and fixing bolts, and the fixing plate limits and presses against the elastic sheet;

[0019] The fixing bolt is used to fix the elastic sheet and the fixing block together through the fixing plate, and to fix the elastic sheet and the movable block together through the fixing plate.

[0020] In one embodiment, the cutting mechanism includes:

[0021] Adjustment seat, the adjustment seat being movably connected to the welding head seat; and

[0022] A cutting head, which is connected to the adjusting base;

[0023] The adjusting seat is used to adjust the spatial position of the cutting head.

[0024] In one embodiment, the adjustment seat includes:

[0025] A first adjusting block is slidably connected to the welding head seat, and the first adjusting block is used to adjust the spatial position of the cutter along a first direction;

[0026] A second adjusting block, slidably connected to the first adjusting block, is used to adjust the spatial position of the cutter head along a second direction; and

[0027] The third adjusting block is connected to the cutter head, and the third adjusting block is rotatably connected to the second adjusting block to adjust the angle of the cutter head;

[0028] The first direction and the second direction are set at an angle.

[0029] In one embodiment, the third adjusting block has a guide groove and a rotating shaft. The guide groove is arranged around the rotating shaft, and the third adjusting block is rotatably connected to the second adjusting block through the rotating shaft. The guide groove is used to limit the rotation angle of the third adjusting block.

[0030] In one embodiment, the pressure mechanism includes:

[0031] A connecting block, the connecting block being connected to the movable block;

[0032] A pressure motor, comprising a stator end and a mover end, wherein the stator end is fixed to the welding head seat, and the mover end is movably connected to the stator end and abuts against the connecting block; and

[0033] A pre-pressure component is provided adjacent to the pressure motor, one end of the pre-pressure component is connected to the welding head seat, and the other end of the pre-pressure component is connected to the connecting block.

[0034] In one embodiment, the wire feeding mechanism includes:

[0035] A connecting platform, which is connected to the transducer base;

[0036] An adjusting block, movably connected to the connecting platform, is provided with a wire clamp for conveying a metal wire; and

[0037] An adjusting rod is rotatably mounted on the connecting platform. One end of the adjusting rod movably abuts against the adjusting block, and the end of the adjusting rod abutting against the adjusting block is provided with a hemispherical head.

[0038] The present invention also proposes a welding apparatus, the welding apparatus comprising:

[0039] Main body; and

[0040] As described above, the welding head structure is connected to the main body.

[0041] In the welding head structure of the present invention, the welding head seat is the structural support component of the welding head structure. The rectangular linkage mechanism includes a movable block and a fixed block, wherein the fixed block is connected to the welding head seat, and the movable block is elastically connected to the fixed block. The rectangular linkage mechanism is used to connect the ultrasonic mechanism and the pressure mechanism. The ultrasonic mechanism includes a transducer and a transducer seat. The transducer is disposed on the transducer seat and the transducer seat is connected to the movable block. The cutting blade is connected to the transducer to perform mechanical vibration welding through ultrasonic waves. One end of the pressure mechanism is connected to the welding head seat and the other end is connected to the movable block to apply pressure to the cutting blade. The wire feeding mechanism is also connected to the transducer seat and is disposed adjacent to the cutting blade to feed metal wires to the cutting blade. The cutting blade mechanism is disposed on the welding head seat and adjacent to the cutting blade to cut the welded metal wires. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the welding head structure in one embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of the welding head structure from another perspective in one embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram of the welding head structure from another perspective in one embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram of a rectangular linkage mechanism in one embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of the cutting mechanism in one embodiment of the present invention;

[0048] Figure 6 This is a schematic diagram of the wire feeding mechanism in one embodiment of the present invention.

[0049] Explanation of icon numbers:

[0050]

[0051]

[0052] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0054] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0055] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0056] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0057] In the semiconductor device manufacturing process, ultrasonic welding machines are generally used to weld metal wires onto chips. Ultrasonic waves from an ultrasonic generator are converted into high-frequency vibrations by a transducer and transmitted to a wedge via an amplitude transformer. When the wedge comes into contact with the lead wire and the workpiece being welded, under the action of pressure and vibration, the surfaces of the metals to be welded rub against each other, the oxide film is destroyed, and plastic deformation occurs, causing the two pure metal surfaces to come into close contact, achieving atomic-level bonding, and ultimately forming a strong mechanical connection.

[0058] In traditional welding head structures, the rectangular linkage mechanism is movably connected by two connecting plates, which not only makes the welding head structure complex and has many stress points, leading to welding instability, but also causes the welding head holder 1 to easily make hard contact with the substrate when it drives the cutting blade to perform welding operations. Furthermore, after welding a point, the cutting blade moves towards the substrate while cutting the weld metal wire through the cutting mechanism, which increases the pressure of the cutting blade on the weld point. This can easily cause damage to the welded points and the welded surface, and the overall stability and welding accuracy are also poor.

[0059] To achieve the above objectives, please refer to Figures 1 to 6 As shown, the present invention proposes a welding head structure 100, which includes a welding head base 1, a rectangular linkage mechanism 2, an ultrasonic mechanism 3, a cutting blade 4, a pressure mechanism 5, a wire feeding mechanism 6, and a cutting mechanism 7. The rectangular linkage mechanism 2 includes a movable block 22 and a fixed block 21 that are elastically connected. The fixed block 21 is connected to the welding head base 1. The ultrasonic mechanism 3 includes a transducer 31 and a transducer base 32 that are connected. The transducer base 32 is connected to the movable block 22. The cutting blade 4 is connected to the transducer 31 and is used for mechanical welding by ultrasonic waves. The pressure mechanism 5 is located on the welding head base 1 and connected to the movable block 22. The pressure mechanism 5 is used to apply pressure to the cutting blade 4. The wire feeding mechanism 6 is connected to the transducer base 32 and is located adjacent to the cutting blade 4. The wire feeding mechanism 6 is used to feed metal wires to the cutting blade 4. The cutting mechanism 7 is located on the welding head base 1 and is located adjacent to the cutting blade 4. The cutting mechanism 7 is used to cut the metal wires.

[0060] In this embodiment, as Figures 1 to 3 As shown, the welding head holder 1 is a structural support component of the welding head structure 100. The welding head holder 1 is also used to connect with the movable stage on the ultrasonic welding machine to realize the movement or rotation of the welding head mechanism in the X-axis, Y-axis, Z-axis and T-axis directions. The ultrasonic mechanism 3, the cleaver 4 and the pressure mechanism 5 used for bonding and welding chips and substrates are also provided on the welding head holder 1 through the rectangular linkage mechanism 3.

[0061] In this embodiment, as Figures 1 to 4 As shown, the rectangular linkage mechanism 2 includes a fixed block 21 and a movable block 22. An ultrasonic mechanism 3 is connected to the movable block 22, and a cutting tool 4 is connected to the ultrasonic mechanism 3. The movable block 22 is elastically connected to the fixed block 21, so that the ultrasonic mechanism 3 and the cutting tool 4 are also elastically connected to the welding head seat 1. It is understood that the ultrasonic mechanism 3 is used to generate ultrasonic mechanical vibrations, causing plastic deformation of the metal leads, thereby achieving the welding of the substrate and the chip. Existing rectangular linkage mechanisms typically have a connecting plate, which connects to other components. This not only makes the rectangular linkage mechanism complex and space-consuming, but also results in multiple vibration modes for the ultrasonic mechanical vibration mechanism and pressure mechanism connected to the rectangular linkage mechanism, leading to poor stability of the cutting tool during welding. In this embodiment, the fixed block 21 and the movable block 22 of the rectangular linkage mechanism 2 are directly connected by an elastic sheet 23. There is no connecting plate between the fixed block 21 and the movable block 22, reducing space occupation, reducing vibration modes, and improving the stability of the welding head structure during welding.

[0062] In this application, the ultrasonic mechanism 3, the cutting blade 4, and the pressure mechanism 5 are also elastically connected to the welding head seat 1 through the rectangular linkage mechanism 3 via the elastic connection of the fixed block 21 and the movable block 22. This effectively simplifies the overall structure of the welding head structure 100, reduces the number of stress points, and results in fewer vibration patterns and higher stability of the welding head structure 100. Furthermore, when the welding head structure 100 welds chips and substrates, it can avoid hard contact with the substrate, effectively improving the buffering performance and stability of the cutting blade 4. At the same time, after completing the ultrasonic vibration welding of a point, the cutting blade mechanism 7 moves downward with the welding head. When cutting the metal wire, it drives the cutting blade 4 to move downward. When it comes into contact with the substrate, the elastic connection allows the cutting blade 4 to reduce the impact force on the substrate and move away from the substrate, effectively preventing damage to the welded joints and the welded surface, and improving the welding accuracy and stability.

[0063] This application also includes a pressure mechanism 5 and a wire feeding mechanism 6, such as Figures 1 to 3 as well as Figure 6 As shown, one end of the pressure mechanism 5 is connected to the welding head seat 1, and the other end is connected to the movable block 22. The pressure mechanism 5 is indirectly connected to the cutting blade 4 through the movable block 22, so that the pressure mechanism 5 can apply constant pressure and dynamic pressure to the cutting blade 4 to cooperate with the mechanical vibration of the ultrasonic wave to achieve the welding of the chip and the substrate. The wire feeding mechanism 6 is connected to the transducer seat 32 and is arranged adjacent to the cutting blade 4 to feed metal wires to the cutting blade 4. The wire feeding mechanism 6 is also elastically connected to the welding head seat 1 through the rectangular linkage mechanism 3.

[0064] In the welding head structure 100 of this technical solution, the welding head seat 1 is the structural support component of the welding head structure 100. The rectangular linkage mechanism 2 includes a movable block 22 and a fixed block 21, wherein the fixed block 21 is connected to the welding head seat 1, and the movable block 22 is elastically connected to the fixed block 21. The rectangular linkage mechanism 2 is used to connect the ultrasonic mechanism 3 and the pressure mechanism 5. The ultrasonic mechanism 3 includes a transducer 31 and a transducer seat 32. The transducer 31 is disposed on the transducer seat 32, and the transducer seat 32 is connected to the movable block 22. The cutting blade 4 is connected to the transducer 31 to perform mechanical welding by ultrasonic waves. One end of the pressure mechanism 5 is connected to the welding head seat 1, and the other end is connected to the movable block 22 to apply pressure to the cutting blade 4. The pressure and wiring mechanism is also connected to the transducer seat 32 and is located near the cutting blade 4. It is used to feed metal wires to the cutting blade 4. The cutting mechanism 7 is located on the welding head seat 1 and near the cutting blade 4. The cutting mechanism 7 is used to cut the welded metal wires. Through the elastic connection of the fixed block 21 and the movable block 22, the ultrasonic mechanism 3, the pressure mechanism 5 and the wire feeding mechanism 6 are also elastically connected to the welding head seat 1 through the rectangular linkage mechanism 3. This makes the cutting blade 4 elastically connected to the welding head seat 1. When the welding head structure 100 contacts the substrate, it can be buffered by the elastic connection to avoid damage to the welded joints and the surface to be welded, simplify the structure and improve the welding accuracy and stability.

[0065] In one embodiment, the rectangular linkage mechanism 2 further includes an elastic sheet 23, a fixed block 21 having a first mounting surface 21a, a movable block 22 having a second mounting surface 22a, one end of the elastic sheet 23 being connected to the first mounting surface 21a, and the other end of the elastic sheet 23 being connected to the second mounting surface 22a, so that the fixed block 21 and the movable block 22 are elastically connected.

[0066] In this embodiment, as Figures 1 to 4 As shown, the fixed block 21 has a first mounting surface 21a, and the movable block 22 has a second mounting surface 22a corresponding to the first mounting surface 21a, such that one end of the elastic piece 23 is connected to the first mounting surface 21a, and the other end of the elastic piece 23 is connected to the second mounting surface 22a, so that the fixed block 21 and the movable block 22 are elastically connected.

[0067] It is understood that the elastic sheet 23 can be made of metal, such as spring steel, chrome vanadium steel, or stainless steel, or it can be made of elastic polymer, such as rubber or thermoplastic elastomer, etc., without limitation. The setting of the elastic sheet 23 enables the ultrasonic mechanism 3 and the cutting blade 4 to have a high connection strength with the welding head seat 1, while also forming a hinge connection structure between the elastic connecting sheet and the ultrasonic mechanism 3 and the welding head seat 1 respectively. During the processing, the ultrasonic mechanism 3 and the pressure mechanism 5 can rotate relative to the welding head seat 1 around the hinge connection, so that the ultrasonic mechanism 3 and the welding head seat 1 have good motion linkage, effectively improving the motion stability of the cutting blade 4 and avoiding damage to the welded product.

[0068] Furthermore, compared to traditional structures where the connecting plates are movably connected to the left and right structures, forming multiple stress points and resulting in lower stability, and during welding, the connecting plates not only shift along the front-to-back direction but also along the left-to-right direction, leading to multiple vibration patterns and poor stability of the welding head structure 100, the elastic sheet 23 in this application forms a hinged connection structure with the fixed block 21 and the movable block 22 respectively. This allows the fixed block 21 and the movable block 22 to be connected by a single elastic sheet 23, forming two hinged structures. This effectively simplifies the connection structure between the ultrasonic mechanism 3 and the pressure mechanism 5 and the welding head seat 1, reduces stress points, and reduces the vibration patterns of the welding head structure 100. The movable block 22 can only make slight rotations around the fixed block 21 or make slight movements in the vertical direction, effectively improving the stability of the welding head structure 100 and enhancing the welding effect.

[0069] In one embodiment, the rectangular linkage mechanism 2 includes a plurality of elastic plates 23; the fixed block 21 has a plurality of spaced first mounting surfaces 21a, and the movable block 22 has a plurality of second mounting surfaces 22a corresponding to the plurality of first mounting surfaces 21a. The two ends of each elastic plate 23 are connected to a first mounting surface 21a and a second mounting surface 22a respectively, so that the plurality of elastic plates 23 are opposite to each other and spaced apart.

[0070] In this embodiment, as Figures 2 to 4 As shown, the fixed block 21 has multiple first mounting surfaces 21a arranged vertically, with the multiple first mounting surfaces 21a spaced apart. For example, first mounting surfaces 21a can be formed on two opposite end faces of the fixed block 21. Multiple spaced first mounting grooves are opened on the main body of the fixed block 21, and a first mounting surface 21a is formed on the bottom or top wall of each first mounting groove. Similarly, the movable block 22 has second mounting surfaces 22a formed on two opposite end faces. The movable block 22 also has multiple spaced second mounting grooves opened on its main body, and a second mounting surface 22a is formed on the bottom or top wall of each second mounting groove. This makes each first mounting surface 21a and each second mounting surface 22a correspond to each other, and one end of each elastic piece 23 is connected to a first mounting surface 21a, and the other end of each elastic piece 23 is connected to a second mounting surface 22a.

[0071] Understandably, the arrangement of multiple elastic plates 23, positioned opposite each other and spaced apart, makes the connection between the movable block 22 and the fixed block 21 tighter, while also providing a higher elastic buffering force between them. Typically, two opposite and spaced elastic plates 23 are positioned between the movable block 22 and the fixed block 21. Compared to existing elastic connection structures, this application directly elastically connects the movable block 22 and the fixed block 21, effectively simplifying the structure and reducing the use of elastic plates 23. The same function as existing mechanisms can be achieved with just two elastic plates 23. The two elastic plates 23, together with the movable block 22 and the fixed block 21, form four hinge connections. The four hinge connections are equivalent to the hinged connection between the movable block 22 and the fixed block 21. The upper and lower elastic plates 23 together with the movable block 22 and the fixed block 21 form a movable parallelogram structure. The parallelogram structure can ensure that the movable block 22 and the fixed block 21 always move relative to each other in two parallel directions. This allows the movable block 22 to move up and down relative to the fixed block 21 through the synchronous deformation of the upper and lower elastic plates 23, while satisfying the connection strength between the ultrasonic mechanism 3 and the pressure mechanism 5 and the welding head seat 1. This ensures the flexible movement of the cutting blade 4 relative to the welding head seat 1 and effectively improves the stability of the welding head structure 100.

[0072] Meanwhile, depending on the overall structural dimensions, weight, and metal lead wire dimensions of the ultrasonic mechanism 3, the chopping blade 4, and the pressure mechanism 5, different numbers of elastic plates 23 can be selected. When the overall structural dimensions and weight of the ultrasonic mechanism 3 and the chopping blade 4 are large, multiple elastic plates 23 can be selected to improve the load-bearing capacity and elastic buffering capacity. The length, thickness, and material of the elastic plates 23 can also be changed. For example, increasing the length of the elastic plate 23, decreasing the thickness of the elastic plate 23, and selecting a material with a smaller elastic coefficient can make the movement of the chopping blade 4 relative to the welding head seat 1 more loose and flexible, and the displacement distance is also larger. Conversely, decreasing the length of the elastic plate 23, increasing the thickness of the elastic plate 23, and selecting a material with a larger elastic coefficient can make the movement of the chopping blade 4 relative to the welding head seat 1 more compact, and the relative displacement distance of the chopping blade 4 is also smaller. This allows for flexible control of the force on the movable block 22 and the movement distance of the movable block 22 relative to the fixed block 21, thereby enabling more precise control of the movement state and spatial position of the chopping blade 4.

[0073] In one embodiment, each elastic sheet 23 includes two fixing modules 231, which are spaced apart at the ends of the elastic sheet 23. One of the two fixing modules 231 is used to connect the elastic sheet 23 and the fixing block 21, and the other of the two fixing modules 231 is used to connect the elastic sheet 23 and the movable block 22.

[0074] In this embodiment, as Figure 3 and Figure 4As shown, two fixing modules 231 are located at both ends of the elastic sheet 23. One of the two fixing modules 231 is used to fix the elastic sheet 23 and the fixing block 21, and the other fixing module 231 is used to fix the elastic sheet 23 and the movable block 22. It can be understood that the fixing module 231 is used to cooperate with the first mounting surface 21a or the second mounting surface 22a to fix the elastic sheet 23. The fixing module 231 fixes the two ends of the elastic sheet 23, leaving the middle part of the elastic sheet 23 intact, so as to realize the elastic connection between the ultrasonic mechanism 3 and the pressure mechanism 5 and the welding head seat 1, and thus realize the elastic connection between the cutting blade 4 and the welding head seat 1.

[0075] In one embodiment, the fixing module 231 includes a fixing plate 2311 and fixing bolts 2312. The fixing plate 2311 limits and presses the elastic sheet 23. The fixing bolts 2312 fix the fixing plate 2311, the elastic sheet 23 and the fixing block 21 (or the movable block 22) together. The fixing bolts 2312 are used to fix the elastic sheet 23 and the fixing block 21 together through the fixing plate 2311, and to fix the elastic sheet 23 and the movable block 22 together through the fixing plate 2311.

[0076] In this embodiment, as Figure 4 As shown, the fixing plate 2311 is used to cooperate with the first mounting surface 21a or the second mounting surface 22a to limit and press the elastic sheet 23, so that the elastic sheet 23 is located between the fixing plate 2311 and the first mounting surface 21a or between the fixing plate 2311 and the second mounting surface 22a. At the same time, the movable block 22 is provided with a first mounting hole, the fixing block 21 is provided with a second mounting hole, the fixing plate 2311 is provided with a connecting hole corresponding to the first mounting hole and the second mounting hole, and the two ends of the elastic sheet 23 are also provided with limit holes corresponding to the first mounting hole and the second mounting hole. One end of the fixing bolt 2312 is provided with a fixing screw, which passes through the connecting hole and the limit hole in sequence, and extends into the first mounting hole or the second mounting hole, and connects with the movable block 22 and the fixing block 21 to limit the fixing plate 2311 and to limit and fix the elastic sheet 23.

[0077] Understandably, the setting of the limiting hole allows the elastic sheet 23 to be fixedly connected to the fixing module 231 by the fixing screw while being squeezed and limited by the fixing plate 2311, effectively preventing the elastic sheet 23 from falling off and shaking. The setting of the fixing plate 2311 and the fixing knob 2312 can not only fasten the elastic sheet 23, but also allow for quick disassembly and replacement of the elastic sheet 23 when it reaches its fatigue life after long-term use by disassembling the fixing module 231.

[0078] In one embodiment, the welding head structure 100 is further provided with a cutting mechanism 7, which includes an adjusting seat 71 and a cutting head 72. The adjusting seat 71 is movably connected to the welding head seat 1, and the cutting head 72 is connected to the adjusting seat 71. The adjusting seat 71 is used to adjust the spatial position of the cutting head 72.

[0079] It is understandable that, such as Figures 1 to 3 as well as Figure 5 As shown, the cutting mechanism 7 is used to cut the metal lead wire after the cleaver 4 in the ultrasonic mechanism 3 has completed welding. The cutting mechanism 7 includes an adjusting seat 71 and a cutting head 72 disposed on the adjusting seat 71. The adjusting seat 71 is movably connected to the welding head seat 1 so that the adjusting seat 71 can move relative to the welding head seat 1, and the adjusting seat 71 itself can also adjust the spatial position of the cutting head 72.

[0080] The existing cutting mechanism 7 is inconvenient to adjust the height and horizontal position of the cutting head 72 during installation, and it also lacks the function of adjusting the vertical tilt angle. This makes it difficult to adjust the installation distance between the cutting head 72 and the chopping blade 4. If the distance between the cutting head 72 and the chopping blade 4 is too close, the chopping blade 4 will interfere with the cutting head 72 during vibration, resulting in blade burning. If the distance between the cutting head 72 and the chopping blade 4 is too large, it will easily cause the cutting position to shift, affecting the welding effect. Therefore, the installation of the cutting mechanism 7 needs to be convenient and precise to adjust the cutting position.

[0081] The adjustment seat 71 in this application can adjust the horizontal position, vertical height and cutting angle of the cutting head 72 in all directions to precisely control the distance between the cutting head 72 and the cutting blade 4, thereby improving the welding effect and welding accuracy.

[0082] In one embodiment, the adjusting base 71 includes a first adjusting block 711, a second adjusting block 712, and a third adjusting block 713. The first adjusting block 711 is slidably connected to the welding head base 1 and is used to adjust the spatial position of the cutter along a first direction. The second adjusting block 712 is slidably connected to the first adjusting block 711 and is used to adjust the spatial position of the cutter head 72 along a second direction. The cutter head 72 is connected to the third adjusting block 713 and the third adjusting block 713 is rotatably connected to the second adjusting block 712 to adjust the angle of the cutter head 72. The first direction and the second direction are set at an angle.

[0083] In this embodiment, as Figure 5 As shown, the first adjusting block 711 is slidably connected to the welding head seat 1, so that the cutting mechanism 7 can adjust the spatial position of the cutting blade in the first direction. The second adjusting block 712 is slidably connected to the first adjusting block 711 to adjust the spatial position of the cutting blade in the second direction. At the same time, the third adjusting block 713 is rotatably connected to the second adjusting block 712 to adjust the cutting blade angle.

[0084] Specifically, the first adjusting block 711 has a first adjusting groove along the first direction, and the first adjusting block 711 is movably connected to the welding head seat 1 through the first adjusting groove. For example, it can be connected to the first adjusting groove through a structure such as a long bolt or a slider to achieve a sliding connection between the first adjusting block 711 and the welding head seat 1. The second adjusting block 712 has a second adjusting groove along the second direction, and the second adjusting block 712 is movably connected to the first adjusting block 711 through the second adjusting groove. Similarly, the second adjusting block 712 can be slidably connected to the first adjusting block 711 through a structure such as a long bolt or a slider.

[0085] The first and second directions are angled, allowing the cutting head 72 to move in space along both directions to adjust the horizontal distance between the cutting head 72 and the chopping blade 4, i.e., adjusting the front-to-back position of the cutting head 72 relative to the chopping blade 4, and the vertical height of the cutting head 72 relative to the chopping blade 4. Specifically, the first and second directions are perpendicular, and the plane on which the third adjusting block 713 rotates relative to the second adjusting block 712 is parallel to the plane formed by the first and second directions. This allows the cutting head 72 to change its angle relative to the chopping blade 4 while moving along the first and second directions. Multiple angles of the cutting head 72 can be adjusted via the adjusting seat 71, thus precisely maintaining the distance between the cutting head 72 and the chopping blade 4.

[0086] Furthermore, in this application, the cross-sectional widths of the parts where the first adjusting block 711, the second adjusting block 712, and the third adjusting block 713 are connected are kept the same, so that by aligning any two or all three of the first adjusting block 711 and / or the second adjusting block 712 and / or the third adjusting block 713, the adjusting seat 71 can be quickly initially positioned, so as to quickly install the cutter head 72 and achieve the rapid initial installation of the cutter head 72.

[0087] In one embodiment, the third adjusting block 713 has a guide groove 7131 and a rotating shaft 7132. The guide groove 7131 is arranged around the rotating shaft 7132. The third adjusting block 713 is rotatably connected to the second adjusting block 712 through the rotating shaft 7132. The guide groove 7131 is used to limit the rotation angle of the third adjusting block 713.

[0088] It is understandable that, such as Figure 2 , Figure 3 as well as Figure 5As shown, the third adjusting block 713 is provided with a rotating shaft 7132, which can be a locating pin or a connecting shaft, and is not limited here. The second adjusting block 712 and the third adjusting block 713 are respectively provided with a first rotating hole and a second rotating hole, so that the rotating shaft 7132 can be movably inserted into the first rotating hole and the second rotating hole, so that the second adjusting block 712 and the third adjusting block 713 can be rotatably connected around the rotating shaft 7132. At the same time, two guide grooves 7131 are provided on the third adjusting block 713, each guide groove 7131 extending along a first direction, and the two guide grooves 7131... The third adjusting block 713 is spaced apart along the second direction, and a long bolt is also provided for the guide groove 7131 corresponding to the third adjusting block 7133, so as to limit the position of the third adjusting block 713 through the guide groove 7131. Each guide groove 7131 can limit the rotation angle of the third adjusting block 713. The setting of the two guide grooves 7131 can ensure that after the third adjusting block 713 rotates around the rotation axis 7132, it is tightly connected with the second connecting block 51 without misalignment or shaking, thereby ensuring that the position of the cutter head 72 remains unchanged after adjustment, improving the structural stability and adjustment accuracy of the adjusting seat 71.

[0089] In one embodiment, the pressure mechanism 5 includes a connecting block 51, a pressure motor 52, and a pre-pressure component 53. The connecting block 51 is connected to the movable block 22. The pressure motor 52 includes a stator end 521 and a mover end 522. The stator end 521 is fixed to the welding head seat 1, and the mover end 522 is movably connected to the stator end 521 and abuts against the connecting block 51. The pre-pressure component 53 is disposed adjacent to the pressure motor 52. One end of the pre-pressure component 53 is connected to the welding head seat 1, and the other end of the pre-pressure component 53 is connected to the connecting block 51.

[0090] In this embodiment, as Figures 1 to 3 As shown, one end of the pressure motor 52 and the pre-pressure component 53 are both connected to the welding head base 1. The pressure motor 52 can be a voice coil motor. The pressure motor 52 includes a relatively stationary stator end 521 and a movable end 522 that moves relative to the stator end 521. The stator end 521 is fixedly mounted on the welding head base 1, and the movable end 522 is movably connected to the stator end 521 and abuts against the connecting block 51. The connecting block 51 is connected to the movable block 22 so that the pressure motor 52 can apply dynamic pressure to the movable block 22. The pre-pressure component 53 can be a pressure structure with an elastic element. The end of the pre-pressure component 53 away from the welding head base 1 is connected to the connecting block 51 and can apply static pressure to the connecting block 51, thereby realizing the application of static pressure to the movable block 22.

[0091] It is understandable that the pressure mechanism 5, through the pressure motor 52 and the pre-pressure component 53, can simultaneously apply dynamic pressure and static pressure to the movable block 22, and transmit the pressure to the cutting blade 4 through the movable block 22, so as to combine with ultrasonic mechanical vibration to achieve bonding welding.

[0092] In traditional rectangular linkage mechanisms, the preload component 53 is directly connected to the connecting plate of the rectangular linkage mechanism. Since the connecting plate is elastically connected to the left movable block and the right fixed block, the pressure of the preload structure applied to the connecting plate is unstable and transmitted to the cutting tool through the left movable block, which greatly reduces the pressure application effect and welding effect.

[0093] In this application, the pre-pressure component 53 is directly connected to the movable block 22 via the connecting block 51, so that pressure can be directly applied to the cutting tool 4 through the movable block 22, which effectively improves the stability of the pressure applied by the pre-pressure component 53 and improves the welding effect.

[0094] In this embodiment, as Figures 1 to 3 as well as Figure 6 As shown, the wire feeding mechanism 6 includes a connecting platform 61, an adjusting block 62, and an adjusting rod 63. The adjusting block 62 is movably connected to the connecting platform 61 and is equipped with a wire clamp 621 for feeding metal wire. The adjusting rod 63 is movably mounted on the connecting platform 61 and movably abuts against the adjusting block 62. The cross-sectional area of ​​the adjusting rod 63 gradually increases from the end abutting against the adjusting block 62 to the end away from the adjusting block 62, so as to adjust the position of the wire clamp 621 on the connecting platform 61. Specifically, the connecting platform 61 is equipped with two support rods, which are opposite to each other and spaced apart to enclose an adjustment space. The adjusting module includes two modules, each of which is movably mounted on one support rod, and at least part of the adjusting module extends into the adjustment space and movably abuts against the adjusting block 62. An adjusting rod 63 can adjust the position of the adjusting block 62 in the adjusting space to adjust the position of the wire clamp 621. The adjusting rod 63 includes an adjusting bolt and an adjusting knob. The adjusting knob is connected to one end of the adjusting bolt and is used to rotate the adjusting bolt. Each rod has an adjusting hole. One end of each adjusting bolt passes through an adjusting hole and extends into the adjusting space to abut against the adjusting block 62. The end of the adjusting bolt away from the adjusting knob, that is, the end of the adjusting bolt that abuts against the adjusting block 62, is provided with a hemispherical head 631, or a cone, or a frustum. This ensures that when the adjusting bolt is rotated to push the adjusting block 62, the end of the hemispherical head 631 or the cone that abuts against the adjusting block 62 is in point contact, avoiding rotation of the adjusting block 62 and the wire clamp 621 caused by rotating the adjusting bolt, thus improving the adjustment accuracy.

[0095] The present invention also proposes a welding device, which includes a main body and the aforementioned welding head structure 100, the welding head structure 100 being connected to the main body. The specific structure of the welding head structure 100 is as described in the foregoing embodiments. Since this welding device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be elaborated here.

[0096] Understandably, the main body includes a frame, display and control components, electrical control box, welding head, and other structural components. The frame is equipped with welding head X-axis, Y-axis, and rotation transfer mechanism. The display and control components are installed on the frame. The electrical control box contains a control host for controlling the operation of the welding equipment. The display and control components, welding head X-axis transfer mechanism, welding head Y-axis transfer mechanism, carrier assembly, and welding head are all electrically connected to the control host.

[0097] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A welding head structure, characterized in that, The welding head structure includes: Welding head holder; A rectangular linkage mechanism, comprising a movable block, a fixed block, and an elastic plate, wherein the fixed block is connected to the welding head seat, and the movable block and the fixed block are directly and elastically connected through the elastic plate; An ultrasonic mechanism, comprising a transducer and a transducer base, wherein the transducer is disposed on the transducer base and the transducer base is connected to the movable block; A cleaver connected to the transducer, the cleaver being used for mechanical vibration welding via ultrasonic waves; A pressure mechanism is provided on the welding head seat and connected to the movable block. The pressure mechanism is used to apply pressure to the chopping blade. The pressure mechanism is indirectly connected to the chopping blade through the movable block, so that the pressure mechanism can apply constant pressure and dynamic pressure to the chopping blade. A wire feeding mechanism, connected to the transducer base and disposed adjacent to the chopping blade, is used to feed a metal wire to the chopping blade; and A cutting mechanism is provided on the welding head seat and adjacent to the cleaver, and the cutting mechanism is used to cut the metal wire.

2. The welding head structure according to claim 1, characterized in that, The fixed block has a first mounting surface, the movable block has a second mounting surface, one end of the elastic sheet is connected to the first mounting surface, and the other end of the elastic sheet is connected to the second mounting surface, so that the fixed block and the movable block are elastically connected.

3. The welding head structure according to claim 2, characterized in that, The rectangular linkage mechanism includes a plurality of the elastic plates; The fixed block has multiple spaced first mounting surfaces, and the movable block has multiple second mounting surfaces corresponding to the multiple first mounting surfaces. The two ends of each elastic piece are connected to one first mounting surface and one second mounting surface, so that the multiple elastic pieces are opposite to each other and spaced apart.

4. The welding head structure according to claim 3, characterized in that, The rectangular linkage mechanism further includes multiple fixing modules. Each elastic piece is connected to two fixing modules. The two fixing modules are spaced apart at both ends of the elastic piece. One of the two fixing modules is used to fix the elastic piece and the fixing block, and the other of the two fixing modules is used to fix the elastic piece and the movable block.

5. The welding head structure according to claim 4, characterized in that, The fixing module includes a fixing plate and fixing bolts, and the fixing plate limits and presses against the elastic sheet; The fixing bolt is used to fix the elastic sheet and the fixing block together through the fixing plate, and to fix the elastic sheet and the movable block together through the fixing plate.

6. The welding head structure according to any one of claims 1 to 5, characterized in that, The cutting mechanism includes: Adjustment seat, the adjustment seat being movably connected to the welding head seat; and A cutting head, which is connected to the adjusting base; The adjusting seat is used to adjust the spatial position of the cutting head.

7. The welding head structure according to claim 6, characterized in that, The adjusting seat includes: A first adjusting block is slidably connected to the welding head seat, and the first adjusting block is used to adjust the spatial position of the cutter along a first direction; A second adjusting block, slidably connected to the first adjusting block, is used to adjust the spatial position of the cutter head along a second direction; and The third adjusting block is connected to the cutter head, and the third adjusting block is rotatably connected to the second adjusting block to adjust the angle of the cutter head; The first direction and the second direction are set at an angle.

8. The welding head structure according to claim 7, characterized in that, The third adjusting block has a guide groove and a rotating shaft. The guide groove is arranged around the rotating shaft. The third adjusting block is rotatably connected to the second adjusting block through the rotating shaft. The guide groove is used to limit the rotation angle of the third adjusting block.

9. The welding head structure according to any one of claims 1 to 5, characterized in that, The pressure mechanism includes: A connecting block, the connecting block being connected to the movable block; A pressure motor, comprising a stator end and a mover end, wherein the stator end is fixed to the welding head seat, and the mover end is movably connected to the stator end and abuts against the connecting block; and A pre-pressure component is provided adjacent to the pressure motor, one end of the pre-pressure component is connected to the welding head seat, and the other end of the pre-pressure component is connected to the connecting block.

10. The welding head structure according to any one of claims 1 to 5, characterized in that, The wire feeding mechanism includes: A connecting platform, which is connected to the transducer base; An adjusting block, movably connected to the connecting platform, is provided with a wire clamp for conveying a metal wire; and An adjusting rod is rotatably mounted on the connecting platform, one end of the adjusting rod is movably abutting against the adjusting block, and the end of the adjusting rod abutting against the adjusting block is provided with a hemispherical head.

11. A welding device, characterized in that, The welding equipment includes: Main body; and The welding head structure as described in any one of claims 1 to 10, wherein the welding head structure is connected to the main body.

Images