Processing mechanism and ultrasonic welding apparatus

Abstract

The processing mechanism (10) includes a welding head (11), one end of which along the second direction (Z) has a welded mark end surface (111), and a middle part of the welded mark end surface along the first direction (X) includes the welding head (11) protruding and installed to bend the welded mark end surface in an arch shape, and welding teeth (12) distributed on the welded mark end surface. The front or rear part of the welded mark end surface in the reciprocating vibration direction is bent toward a direction away from the workpiece (30) to be welded, and when the welded mark end surface is inclined due to friction, the pressing force of the front or rear part of the welded mark end surface against the workpiece to be welded is reduced, thereby avoiding or reducing the risk of cracks appearing in the front or rear of the welded mark area (31), effectively protecting the workpiece to be welded, and reducing the risk of the workpiece to be welded being pushed out and cut by the welded mark end surface. The ultrasonic welding device (100) also relates to an ultrasonic welding device (100).

Description

Technical Field

[0001] [Cross-reference to Related Applications] This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on November 30, 2022, with the application number 202223187079.2 and the invention title "Processing Mechanism and Ultrasonic Welding Device", and all of its content is incorporated into this application by reference.

[0002] This application belongs to the technical field of ultrasonic welding, and more specifically, relates to a processing mechanism and an ultrasonic welding device.

Background Art

[0003] The description here does not necessarily constitute the prior art, but only provides background information related to this application. Generally, in an ultrasonic welding device, welding teeth are installed on the operating plane of the welding head, which contacts the workpiece to be welded and reciprocates ultrasonically vibrates, causing ultrasonic vibration friction between the workpieces to be welded to generate heat and weld and connect. When the welding head contacts the workpiece to be welded and vibrates back and forth, a reverse acting force is generated on the welding head, causing the welding head to tilt relative to the welding base. As a result, when the ultrasonic welding device is used to weld a thin workpiece such as a foil material, for example, to weld the tab of a battery to an adapter, cracks occur in the front or rear part of the welding trace area, and thus the workpiece is easily cut.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The purpose of the embodiments of this application is to provide a processing mechanism and an ultrasonic welding device to solve the problem that when an ultrasonic welding device welds a thin workpiece in the related art, cracks occur in the front or rear part of the welding trace area, and thus the workpiece is easily cut.

Means for Solving the Problems

[0005] The technical solutions adopted in the embodiments of this application are as follows.

[0006] According to a first aspect, an embodiment of the present application provides a processing mechanism, which includes a welding head, the welding head having a weld mark end face at one end along a second direction, and the middle portion of the weld mark end face along a first direction, which is positioned to project away from the welding head so as to bend the weld mark end face in an arch shape; and welding teeth, the welding teeth being distributed on the weld mark end face, wherein the first direction is parallel to the reciprocating direction in which the welding head vibrates reciprocatingly when used for welding, the second direction is the longitudinal direction of the welding head, and the second direction is perpendicular to the first direction.

[0007] In the invention of this application, the welded end face of the welding head is set in an arch shape, so that the middle portion of the welded end face along the first direction protrudes. When the welded end face presses against the workpiece awaiting welding and causes the workpiece to vibrate reciprocatingly along the first direction, the welded end face tilts due to frictional force, causing the front or rear portion of the welded end face in the direction of reciprocating vibration to bend away from the workpiece. In this way, the pressing force on the workpiece by the front or rear portion of the welded end face in the direction of reciprocating vibration is reduced, thereby avoiding or reducing the risk of cracks appearing in the front or rear of the welded area, effectively protecting the workpiece awaiting welding, and reducing the risk of the workpiece being pushed out and cut by the welded end face.

[0008] In some embodiments, the cross-section of the weld end face parallel to the first direction is arc-shaped or a smooth curve.

[0009] By installing the above structure, the corner angle caused by contact between the welded end face and the workpiece awaiting welding can be reduced, thereby avoiding the problem of cracking of the workpiece awaiting welding due to corner pressure.

[0010] In some embodiments, a plane passing through the middle of the weld head along a first direction and perpendicular to the first direction is an intermediate plane, and the opposing sides of the intermediate plane on the weld end face are a first region and a second region, respectively. The first and second regions are positioned symmetrically with respect to the intermediate plane, or the bending width of the first region is greater than the bending width of the second region.

[0011] With the above structure, the first and second regions are positioned symmetrically with respect to the intermediate plane, balancing the pressing force on the weld marks at both ends of the workpiece awaiting welding in the first direction, resulting in a more uniform and stronger weld on the workpiece awaiting welding. When the welding head tends to tilt towards the second region during welding, by making the bending width of the first region larger than that of the second region, the pressing force on the workpiece awaiting welding by both ends along the first direction of the weld marks can be reduced, effectively protecting the workpiece awaiting welding and avoiding or reducing the risk of cracks appearing at the front or rear of the weld marks region. Furthermore, for workpieces awaiting welding with uneven thickness, the thicker side of the workpiece awaiting welding can be placed at the corresponding position in the first region, thus balancing the pressing force on the workpiece awaiting welding by the weld marks at the end surface, resulting in a more uniform and stronger weld on the workpiece awaiting welding.

[0012] In some embodiments, the point on the welded tooth furthest from the weld end face in a direction perpendicular to the weld end face is the farthest point, the plane on which multiple farthest points are located is the farthest plane, and the middle portion of the farthest plane along the first direction is positioned to project outward so as to curve the farthest plane in an arch shape.

[0013] With the above structure installed, the far-field surface is bent into an arch shape, and the middle portion along the first direction of the far-field surface is installed to protrude. The welded end surface and welding teeth press against the workpiece awaiting welding, and the force exerted by the welding teeth on the workpiece awaiting welding becomes balanced, causing the welded end surface and welding teeth to reciprocate more effectively.

[0014] In some embodiments, the far surface is parallel to the weld end face.

[0015] With the above structure installed, the far-field surface is parallel to the welded end surface, and the distance from each welded tooth to the welded end surface can be shortened to facilitate the design and manufacturing of the welded teeth. Furthermore, the welded end surface and the welded teeth press against the workpiece awaiting welding, shortening the distance at which the welded teeth press into the workpiece awaiting welding. This balances the force exerted by the welded teeth on the workpiece awaiting welding, causing the welded end surface and the welded teeth to reciprocate more effectively.

[0016] In some embodiments, the height to which each weld tooth protrudes from the weld end face is equal.

[0017] The above structure makes it easier to design and manufacture welding teeth, equalizes the distance at which the welding teeth press-fit the workpiece awaiting welding, balances the force exerted by the welding teeth on the workpiece awaiting welding, and allows the welded end face and welding teeth to reciprocate more effectively.

[0018] In some embodiments, the height to which the weld teeth protrude from the weld end face is gradually increased in the direction from the middle to both ends in the first direction of the weld end face. Alternatively, the height to which the welding teeth protrude from the weld end face is gradually reduced in the direction from the middle to both ends in the first direction of the weld end face.

[0019] By installing the above structure, the height to which the welding teeth on both sides of the welded end face protrude from the welded end face is gradually reduced. When the welded end face pushes against the workpiece awaiting welding, and the welding head vibrates and tilts, the force exerted on the workpiece awaiting welding by the welding teeth tilting together with the welding head is reduced, and the risk of cracks appearing in the front or rear of the welded area can be better avoided or reduced. By installing the height to which the welding teeth on both sides of the welded end face protrude from the welded end face is gradually increased. When the welded end face pushes against the workpiece awaiting welding, the welding teeth at the end can be pressed more deeply into the workpiece awaiting welding, increasing the pressing force against the workpiece awaiting welding and stabilizing it, thereby allowing the workpiece awaiting welding to vibrate more smoothly.

[0020] In some embodiments, the point on the welding tooth that is farthest from the welding trace end face along the second direction is the far end point, the plane where the plurality of far end points are located is the far end face, the far end face is a flat plane, and the second direction is perpendicular to the far end face.

[0021] With the above structural arrangement, the plurality of welding teeth can contact and press the workpieces to be welded almost simultaneously. Especially for workpieces to be welded with relatively high hardness, the deformation of the workpieces to be welded is small, and the pressing force of the welding head on the workpieces to be welded can be balanced.

[0022] In some embodiments, any two adjacent welding teeth on the welding trace end face are arranged at intervals.

[0023] With the above structural arrangement, in order to facilitate processing and manufacturing, the installation of welding teeth can be reduced. When the welding teeth press the workpieces to be welded, the extrusion deformation of the workpieces to be welded can be reduced, and the workpieces to be welded can be better protected.

[0024] In some embodiments, the end of the welding tooth close to the welding trace end face is the tooth root, and the connection portion between the surface of the tooth root and the welding trace end face presents a smooth curved surface.

[0025] With the above structural arrangement, the stress concentration at the contact portion between the edge of the tooth root and the welding trace end face can be reduced, the structural strength of the connection between the welding tooth and the welding trace end face can be guaranteed, and when the welding tooth and the welding trace end face press the workpiece to be welded, the corner angle on the workpiece to be welded can be reduced, and the structural strength of the workpiece to be welded can be better guaranteed.

[0026] In some embodiments, the area between two adjacent welding teeth on the welding trace end face is recessed into an arc surface, and the arc surface is tangent to the edge of the tooth root.

[0027] With the above structural arrangement, the stress concentration at the contact portion between the edge of the tooth root and the welding trace end face can be better reduced, and the structural strength of the connection between the welding tooth and the welding trace end face can be guaranteed.

[0028] In some embodiments, a plurality of welding teeth are arranged in a matrix on the end face of the welding mark.

[0029] With the above structure arrangement, the design layout of the welding teeth can be facilitated, and the processing and manufacturing of the welding teeth can be made easier.

[0030] In some embodiments, first fillets are provided on the edges at both ends along the first direction of the welding head, and / or second fillets are provided on the edges along both ends perpendicular to the third direction of the welding head, where the third direction is perpendicular to the first direction and the third direction is perpendicular to the second direction.

[0031] With the above structure arrangement, first fillets are provided on the edges at both ends along the first direction of the welding head. When the end face of the welding mark presses the workpiece to be welded, the contact stress between both ends along the first direction of the end face of the welding mark and the workpiece to be welded can be reduced, and the workpiece to be welded can be better protected. Second fillets are provided on the edges at both ends along the third direction of the welding head, and the contact stress between both ends along the third direction of the end face of the welding mark and the workpiece to be welded can be reduced, and the workpiece to be welded can be better protected.

[0032] In some embodiments, the welding teeth exhibit one or more of a part of a sphere, a frustum of a cone, and a tapered shape.

[0033] With the above structure arrangement, the design and layout of the welding teeth can be facilitated. By providing the welding teeth as a part of a sphere, the contact stress on the workpiece to be welded can be reduced, and the damage to the workpiece to be welded can be reduced. By providing the welding teeth in a frustum of a cone shape, the workpiece to be welded can be better pressed, and the contact stress on the workpiece to be welded by the peripheral side of the welding teeth can be reduced. By providing the welding teeth in a tapered shape, the workpiece to be welded can be better fixed.

[0034] In some embodiments, the processing mechanism further includes a support body, and the welding head is attached to the support body.

[0035] With the above-described structure, the support body can be easily installed to support the welding head, thus facilitating the attachment and fixing of the welding head, and making it easier to use the welding head.

[0036] According to a second aspect, an embodiment of the present application provides an ultrasonic welding apparatus including the processing mechanism described in the above embodiment.

[0037] The above description is merely an outline of the proposed technology of this application. In order to better understand the technical means of this application, and to make the above and other objectives, features, and advantages of this application clearer and easier to understand, the following will describe specific embodiments of this application, which can be implemented according to the specifications.

[0038] To more clearly illustrate the technical concepts in the embodiments of this application, the following briefly introduces the drawings that may be used in the embodiments or illustrative technical descriptions. It is obvious that the drawings in the following description are only a few embodiments of this application, and those skilled in the art can obtain other drawings based on these without expending any creative effort. [Brief explanation of the drawing]

[0039] [Figure 1] This is a schematic perspective view of the ultrasonic welding apparatus according to several embodiments of this application. [Figure 2] This is a schematic side view of an ultrasonic welding apparatus according to several embodiments of this application. [Figure 3] This is a schematic perspective view of the processing mechanism of several embodiments of this application. [Figure 4] Figure 3 is a schematic perspective view of the welding head portion of the processing mechanism shown. [Figure 5] Figure 4 is a schematic diagram of the side structure of the welding head portion. [Figure 6]This is a schematic diagram of the structure of the welding head portion of a processing mechanism in some other embodiments of this application. [Figure 7] This is a schematic diagram of the structure of the welding head portion of a processing mechanism in several other embodiments of this application. [Figure 8] This is a schematic diagram of the structure of the welding head portion of a processing mechanism in some further embodiments of this application. [Figure 9] This is a schematic diagram of the structure of the welding head portion of the processing mechanism in some embodiments of this application. [Figure 10] This is a schematic diagram of the structure of the welding head portion of a processing mechanism in several other embodiments of this application. [Figure 11] This is a schematic diagram of the structure of the welding head portion of a processing mechanism in some further embodiments of this application. [Figure 12] This is a schematic diagram of the structure of the welding head portion of a processing mechanism in some other embodiments of this application. [Figure 13] This is a schematic diagram of the structure of the welding teeth of the processing mechanism in some embodiments of this application. [Figure 14] This is a schematic diagram of the structure of the welding teeth of a machining mechanism in some other embodiments of this application. [Figure 15] This is a schematic diagram of the structure of the welding teeth of a machining mechanism in several other embodiments of this application. [Figure 16] This is a schematic diagram of the structure of the welding teeth of a machining mechanism in some further embodiments of this application. [Modes for carrying out the invention]

[0040] To further clarify the technical problem, technical solution, and beneficial effects that this application seeks to solve, this application will be described in more detail, linking it with the following drawings and embodiments. It should be understood that the specific embodiments described herein are used solely for the purpose of interpreting this application and not to limit it.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art relating to the present application. The terms used herein are solely for the purpose of describing specific embodiments and are not intended to limit this application. The terms “including” and “having” and any variations thereof in the description of the specification, claims, and drawings of this application are intentionally intended to cover the non-exclusive “including.”

[0042] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used solely to distinguish different subjects and are not intended to indicate or suggest relative importance, or to implicitly indicate the number, specific order, or hierarchical relationship of the technical features described. Thus, features limited to "first" and "second" may explicitly or implicitly include one or more such features.

[0043] The “Examples” as used herein mean that certain features, structures, or characteristics described in conjunction with the Examples may be included in at least one Example of this Application. The appearance of this phrase at each location in the Specification does not necessarily refer to the same Example, nor does it mean that each Example is mutually exclusive or alternative to the others. Those skilled in the art will understand, both explicitly and implicitly, that the Examples described herein can be combined with other Examples in any suitable manner.

[0044] In the description of the embodiments of this application, the term "and / or" merely describes the relationship between related objects and indicates that three relationships may exist. For example, A and / or B may represent three cases: A alone, a combination of A and B, or B alone. In this specification, the letter " / " generally indicates that the preceding and succeeding related objects are in an "or" relationship.

[0045] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple sheets" refers to two or more sheets (including two sheets). The meaning of "several" is one or more unless otherwise specified.

[0046] In the description of the embodiments of this application, the orientations or positional relationships indicated by technical terms such as "center," "vertical direction," "horizontal direction," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are orientations or positional relationships shown based on the drawings, and are intended to describe and simplify the descriptions of the embodiments of this application. They do not indicate or imply that the mentioned devices or elements have a specific orientation or must be configured and operated in a specific orientation, and therefore cannot be understood as limitations on the embodiments of this application.

[0047] In the description of the embodiments of this application, unless otherwise explicitly defined or limited, technical terms such as "attachment," "connection," "bonding," and "fixing" should be understood in a broad sense. For example, they may refer to fixed connections, removable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, internal communication between two elements, or interaction relationships between two elements. Those skilled in the art will be able to understand the specific meaning of these terms in the embodiments of this application, depending on the specific circumstances.

[0048] In the descriptions of embodiments of this application, unless otherwise explicitly specified or limited, when an element is referred to as “attached” or “installed” to another element, it may be directly located to the other element or indirectly located to that other element. When one element is referred to as “connected” to another element, it may be directly connected to the other element or indirectly connected to that other element.

[0049] In the description of the embodiments of this application, unless otherwise explicitly defined or limited, the technical term "proximity" means being close in position. For example, if there are three members A1, A2 and B, the distance between A1 and B is greater than the distance between A2 and B, and A2 is closer to B than A1, meaning that A2 is close to B and B is close to A2. Also, for example, if there are multiple C members, and these multiple C members are C1, C2...C N Therefore, if one of the C members, for example C2, is closer to the B member than the other C members, then it can be said that B is closer to C2, and C2 is closer to B.

[0050] The battery core, as referred to in the embodiments of this application, also called an electrode assembly, is a component used to manufacture a battery cell. A battery cell is a component used to manufacture a battery. That is, a battery refers to a single physical module containing one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a housing for packaging one or more battery cells. The housing can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells. In some cases, the battery cells may be used directly, i.e., the battery may not include a housing, but is not limited herein.

[0051] In the embodiments of this application, the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, and the embodiments of this application are not limited thereto. The battery cell may have a cylindrical, flattened, rectangular parallelepiped, or other shape, and the embodiments of this application are not limited thereto. Battery cells are generally classified into three types based on their packaging: cylindrical battery cells, rectangular battery cells, and pouch battery cells, and the embodiments of this application are not limited thereto.

[0052] In the embodiments of this application, the battery cell includes an electrode assembly comprising a positive electrode plate, a negative electrode plate, and a separator. The electrode assembly operates primarily through the movement of metal ions between the positive and negative electrode plates. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated onto the surface of the positive electrode current collector. The portion of the positive electrode current collector not coated with the positive electrode active material layer protrudes from the portion already coated with the positive electrode active material layer. This uncoated portion serves as a positive electrode tab, or a metal conductor is welded to the positive electrode current collector as a positive electrode tab and extended out. Taking a lithium-ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated onto the surface of the negative electrode current collector. The portion of the negative electrode current collector not covered by the negative electrode active material layer protrudes from the portion covered by the layer. This uncovered portion serves as a negative electrode tab, or a metallic conductor is welded to the negative electrode current collector as a negative electrode tab. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon. To ensure that the plate does not melt even when a large current flows, there are multiple positive electrode tabs, and the negative electrode tabs are also multiple and stacked. The positive electrode tabs and negative electrode tabs are generally collectively referred to as tabs.

[0053] Battery cells are often equipped with electrode terminals for power supply and use. These electrode terminals are conductive components on the battery cell, connected via tabs in the electrode assembly, and are used to output electrical energy from the battery cell or to charge the battery cell.

[0054] An adapter is a conductive piece that connects the tabs and electrode terminals in a battery cell. Adapters are often installed to connect the electrode terminals and tabs. To ensure a strong connection between the adapter and tab, they are often joined by welding, thereby guaranteeing good conductivity. Therefore, the effect of welding the adapter and tab is extremely important for the battery cell.

[0055] Ultrasonic welding, also known as ultrasonic welding, involves driving a welding head via an ultrasonic welding device to reciprocate ultrasonic vibrations of the workpieces awaiting welding. The friction between the workpieces generates heat, causing the contact points to heat up, melt, and weld together. Ultrasonic welding can weld thin workpieces such as foil materials and can be used, for example, to weld tabs to adapters.

[0056] However, when ultrasonically welding thin workpieces, cracks tend to appear in the front or rear of the contact area between the workpiece awaiting welding and the welding head (i.e., the welding area), and in serious cases, the workpiece awaiting welding may even be cut.

[0057] In particular, with regard to the welding of the tab and adapter, the connection area between the tab and adapter is the area through which current passes (i.e., the overcurrent area). Therefore, if a crack appears in the front or rear of the welded area, the current area of ​​the tab and adapter is affected, increasing the internal resistance, which affects the performance of the battery core. This can lead to the front or rear of the welded area between the tab and adapter being severed, directly causing the battery core to fail.

[0058] Based on the above problem, the inventors of this application have discovered through research that during ultrasonic welding, the welding head needs to reciprocate the workpiece awaiting welding, and that during welding, the workpiece awaiting welding must be supported on the welding base, and the welded end face of the welding head presses against the workpiece awaiting welding, causing it to reciprocate. When the welding head reciprocates the workpiece awaiting welding, it receives a force acting in the opposite direction from the workpiece awaiting welding. This reverse force causes the welding head to tilt forward or backward along the direction of reciprocating vibration, and as a result, the welded end face on the welding head tilts forward or backward along the direction of reciprocating vibration, and one end of the welded end face along the direction of reciprocating vibration pushes the workpiece awaiting welding toward the welding base. Currently, since the welded end face is generally flat, when one end of the welded end face along the reciprocating vibration direction pushes the workpiece awaiting welding, the front or rear of the welded area is indented towards the welding base, causing greater deformation. In the case of thin workpieces awaiting welding, such as the weld between the tab and adapter of a battery core, such pushing can cause cracks to appear in the front or rear of the contact area between the workpiece awaiting welding and the welding head (i.e., the welded area), and in serious cases, the workpiece awaiting welding may be severed.

[0059] Based on the above findings, the embodiment of this application provides a processing mechanism in which the weld mark end face on the welding head of the processing mechanism is set to exhibit an arch shape that protrudes along the middle of the reciprocating vibration direction, thereby reducing the pushing force on the workpiece awaiting welding by bending both ends of the weld mark end face when the welding head tilts forward or backward in the reciprocating vibration direction, thereby reducing or avoiding the risk of cracks appearing in the front or rear of the weld mark area on the workpiece awaiting welding, and further effectively preventing the workpiece awaiting welding from being pushed out and cut by the weld mark end face.

[0060] Referring to Figures 1 to 5, Figure 1 is a schematic perspective view of the ultrasonic welding apparatus according to some embodiments of this application. Figure 2 is a schematic side view of the ultrasonic welding apparatus according to some embodiments of this application. Figure 3 is a schematic perspective view of the processing mechanism according to some embodiments of this application. Figure 4 is a schematic perspective view of the welding head portion of the processing mechanism according to some embodiments of this application. Figure 5 is a schematic side view of the welding head portion according to some embodiments of this application.

[0061] The ultrasonic welding apparatus 100 includes a welding base 21 and a processing mechanism 10. The welding base 21 is a member for supporting the workpieces 30 awaiting welding. The processing mechanism 10 is a member that presses the workpieces 30 awaiting welding against the welding base 21 and causes the workpieces 30 to undergo reciprocating vibration welding. Before placing the workpieces 30 awaiting welding against the welding base 21 and the processing mechanism 10 during use, the processing mechanism 10 presses the workpieces 30 awaiting welding against the welding base 21, and the processing mechanism 10 vibrates reciprocatingly, causing the workpieces 30 to vibrate back and forth, resulting in friction between the workpieces 30, generating heat and welding them together.

[0062] In some embodiments, the ultrasonic welding apparatus 100 further includes a holder 22, the welding base 21 is attached to the holder 22, the holder 22 supports and positions the welding base 21 and facilitates the mounting and fixing of the welding base 21.

[0063] Referring to Figures 1, 3 to 5, the processing mechanism 10 includes a welding head 11. During welding, the welding head 11 presses against the workpiece 30 awaiting welding, causing the workpiece 30 to vibrate back and forth.

[0064] For the sake of clarity, the following definitions are used: The direction of reciprocating motion when the welding head 11 causes the workpiece 30 awaiting welding to vibrate back and forth is the first direction, for example, the X direction in the figure. That is, the welding head 11 and the workpiece 30 awaiting welding vibrate back and forth along the first direction. The direction from the welding head 11 to the welding base 21 is defined as the second direction, for example, the Z direction in the figure. Accordingly, the second direction is also the longitudinal direction of the welding head 11, i.e., the Z direction is the longitudinal direction of the welding head 11. A third direction is defined, for example, the Y direction in the figure. The third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

[0065] One end of the welding head 11 along the second direction has a welded end face 111, and during welding, the welded end face 111 comes into contact with the workpiece 30 awaiting welding; in other words, the welded end face 111 is the side of the welding head 11 closest to the workpiece 30 awaiting welding.

[0066] Multiple welding teeth 12 are provided on the welded end surface 111; that is, the processing mechanism 10 further includes multiple welding teeth 12, and the multiple welding teeth 12 are distributed on the welded end surface 111. When the welding head 11 presses the workpiece 30 awaiting welding, the welding teeth 12 are pressed into the workpiece 30 awaiting welding, increasing the frictional force between the welding head 11 and the workpiece 30 awaiting welding, thereby fixing the workpiece 30 awaiting welding and causing it to vibrate back and forth.

[0067] The welded end face 111 is installed in an arch shape, specifically, the middle portion of the welded end face 111 along the first direction X is installed to protrude so that the welded end face 111 is bent and installed in an arch shape. The middle portion of the welded end face 111 along the first direction X refers to the region of the welded end face 111 that is close to the middle of the welded end face 111 along the first direction X. The middle portion of the welded end face 111 in the first direction X protrudes away from the longitudinal middle portion of the welding head 11. In other words, when in use, the middle portion of the welded end face 111 along the first direction X is positioned to protrude toward the workpiece 30 awaiting welding, and both ends of the welded end face 111 along the first direction X are bent away from the workpiece 30 awaiting welding. As a result, when the welded end face 111 moves toward the workpiece 30 awaiting welding, the middle portion of the welded end face 111 along the first direction X presses against the workpiece 30 awaiting welding, and when the welded end face 111 presses against the workpiece 30 awaiting welding, the force exerted by both ends of the welded end face 111 along the first direction X pressing against the workpiece 30 awaiting welding is smaller than the force exerted by the middle portion of the welded end face 111 along the first direction X pressing against the workpiece 30 awaiting welding. When the welding head 11 vibrates the workpiece 30 awaiting welding along a first direction X, friction generates a reverse force on the welding head 11. Under this reverse force, the welding head 11 tilts forward or backward along the first direction X, and the weld mark end face 111 tilts forward or backward along the first direction X with it. The weld mark end face 111 is set in an arch shape, and both ends of the weld mark end face 111 along the first direction X are bent away from the workpiece 30 awaiting welding. When the weld mark end face 111 tilts forward or backward along the first direction X, the pushing force on the workpiece 30 awaiting welding by both ends of the weld mark end face 111 along the first direction X is not too large, effectively protecting the workpiece 30 awaiting welding and avoiding or reducing the risk of cracks appearing in the front or rear of the weld mark area 31 on the workpiece 30 awaiting welding.

[0068] In the invention of this application, the welded end face 111 of the welding head 11 is set in an arch shape, so that the middle part of the welded end face 111 along the first direction X protrudes. When the welded end face 111 presses against the workpiece 30 awaiting welding and vibrates the workpiece 30 back and forth along the first direction X, the welded end face 111 tilts due to frictional force, causing the front or rear part of the welded end face 111 in the direction of reciprocating vibration to bend away from the workpiece 30 awaiting welding. This reduces the pressing force on the workpiece 30 awaiting welding by the front or rear part of the welded end face 111 in the direction of reciprocating vibration, thereby avoiding or reducing the risk of cracks appearing in the front or rear of the welded area 31, effectively protecting the workpiece 30 awaiting welding, and reducing the risk of the workpiece 30 being pushed out and cut by the welded end face 111.

[0069] In some embodiments, referring to Figures 1 to 3, the processing mechanism 10 further includes a support body 13, and the welding head 11 is attached to the support body 13. The support body 13 is another component for fixing and supporting the welding head 11 and connecting to the ultrasonic welding apparatus 100. By installing the support body 13, the welding head 11 is easily supported, thus facilitating the installation and fixing of the welding head 11 and facilitating the use of the welding head 11.

[0070] In some embodiments, the welding head 11 and the support body 13 are integrally molded structures, thereby facilitating processing and manufacturing and ensuring the strength of the connection between the welding head 11 and the support body 13. As can be understood, the welding head 11 and the support body 13 may be manufactured separately and then fixedly connected.

[0071] In some embodiments, the welding head 11 is mounted on the longitudinal side of the support body 13 to reduce the overall height of the processing mechanism 10. As can be understood, the welding head 11 may also be mounted on the longitudinal end face of the support body 13.

[0072] In some embodiments, welding heads 11 are installed on opposing longitudinal sides of the support body 13 for replacing welding heads 11. To make it clear, welding heads 11 may be installed on multiple longitudinal sides of the support body 13. That is, when welding heads 11 are installed on longitudinal sides of the support body 13, welding heads 11 may be installed on one or more other sides, but are not limited thereto.

[0073] In some embodiments, the cross-section of the welded end face 111 parallel to the first direction X is arc-shaped, so that the entire welded end face 111 has an arc-shaped surface to facilitate processing and manufacturing. The arc-shaped welded end face 111 has no corners, so when the welded end face 111 presses against the workpiece 30 awaiting welding, no corners are formed in the welded area 31 of the workpiece 30 due to the pressure from the welded end, thus avoiding the problem of cracking of the workpiece 30 due to corner pressure.

[0074] In some embodiments, the cross section of the welded end face 111 parallel to the first direction X may be set in a smooth curved shape, that is, the cross section of the welded end face 111 parallel to the first direction X may be set in a curved shape, and this curve may be formed by connecting a plurality of arc segments, thereby reducing the corner angle due to contact between the welded end face 111 and the workpiece 30 awaiting welding, and thus avoiding the problem of cracking of the workpiece 30 awaiting welding due to corner angle pressing.

[0075] For the sake of convenience, the following definition is used: The plane passing through the middle of the welding head 11 along the first direction X and perpendicular to the first direction X is the intermediate surface 110, that is, the first direction X is the normal direction of the intermediate surface 110, and the intermediate surface 110 is located in the middle of the welding head 11 along the first direction X. The portions of the weld end face 111 on opposite sides of the intermediate surface 110 are the first region 1111 and the second region 1112, respectively, that is, the weld end face 111 is the first region 1111 and the second region 1112 on opposite sides of the intermediate surface 110.

[0076] In some embodiments, referring to Figure 5, the first region 1111 and the second region 1112 are positioned symmetrically with respect to the intermediate surface 110 to facilitate processing and manufacturing, and when the welded end surface 111 presses against the workpiece 30 awaiting welding, the contact forces on the workpiece 30 by the first region 1111 and the second region 1112 can be equal or close, so that the pressing force received by the welded end surface 111 at both ends of the workpiece 30 awaiting welding in the first direction X is balanced, the weld of the workpiece 30 awaiting welding becomes more uniform and stronger, and the welding effect is enhanced.

[0077] For the sake of clarity, the following definition is used: The farthest point on the weld tooth 12, along a direction perpendicular to the weld end face 111, is the farthest point 121. In other words, the point on the weld tooth 12 that is the greatest distance from the weld end face 111 is the farthest point 121. The surface on which multiple farthest points 121 are located is the farthest surface 122. The farthest surface 122 reflects the height at which the weld tooth 12 on the weld end face 111 protrudes from the weld end face 111.

[0078] In some embodiments, referring to Figure 5, the middle portion of the far surface 122 along the first direction X is installed to project outwards, causing the far surface 122 to curve in an arch shape. That is, the far surface 122 is installed in an arch shape, and specifically, the middle portion of the far surface 122 along the first direction X is installed to project outwards, causing the far surface 122 to curve in an arch shape. The middle portion of the far-reach surface 122 in the first direction X protrudes away from the longitudinal middle portion of the welding head 11. In other words, when in use, the middle portion of the far-reach surface 122 along the first direction X is positioned to protrude toward the workpiece 30 awaiting welding, and both ends of the far-reach surface 122 along the first direction X are bent away from the workpiece 30 awaiting welding, so that the welded end face 111 and welding teeth 12 press against the workpiece 30 awaiting welding, reducing the depth to which the welding teeth 12 are pressed into the workpiece 30 awaiting welding, balancing the force acting on the workpiece 30 awaiting welding, and causing the welded end face 111 and welding teeth 12 to reciprocate the workpiece 30 awaiting welding more effectively.

[0079] In some embodiments, as shown in Figure 5, the far surface 122 is parallel to the weld end surface 111. To facilitate the design and manufacturing of the welding teeth 12, the distance from each welding tooth 12 to the weld end surface can be shortened, and the distance at which the welding teeth 12 are pressed into the workpiece 30 is shortened as the weld end surface 111 and the welding teeth 12 press against the workpiece 30 awaiting welding. This balances the force acting on the workpiece 30 awaiting welding by the welding teeth 12, allowing the weld end surface 111 and the welding teeth 12 to reciprocate the workpiece 30 awaiting welding more effectively.

[0080] In some embodiments, as shown in Figure 5, each welding tooth 12 protrudes from the welded end face 111 at an equal height, which facilitates the design and manufacturing of the welding teeth 12. Furthermore, when the entire welded end face 111 contacts the workpiece 30 awaiting welding, the distance at which the welding teeth 12 are pressed into the workpiece 30 is approximately equal, balancing the force exerted by the welding teeth 12 on the workpiece 30 awaiting welding, and causing the welded end face 111 and the welding teeth 12 to reciprocate more effectively.

[0081] In some embodiments, multiple welding teeth 12 are arranged in a matrix on the welded end face 111, that is, the welding teeth 12 on the welded end face 111 are arranged in rows and columns to facilitate the design layout of the welding teeth 12 and to facilitate the processing and manufacturing of the welding teeth 12.

[0082] In some embodiments, the welding teeth 12 may be arranged in rows along a first direction X to facilitate processing and manufacturing, and the welding teeth 12 may be arranged in rows along a third direction Y. As can be understood, the welding teeth 12 may be arranged in rows inclined toward the first direction X.

[0083] In some embodiments, multiple welding teeth 12 may be distributed in an array on the welded end surface 111. This ensures that the multiple welding teeth 12 are uniformly distributed on the welded end surface 111, facilitating the design and layout of the welding teeth 12. Furthermore, when the welding teeth 12 press against the workpiece 30 awaiting welding, the pressing force of the welding teeth 12 against the welded area 31 of the workpiece 30 becomes more uniform, resulting in uniform welding strength in the welded area 31 and enhancing the welding effect.

[0084] In some embodiments, multiple welding teeth 12 may be laid out in a dispersed manner on the welded end surface 111, that is, multiple welding teeth 12 are distributed on the welded end surface 111 in a non-uniform manner, for example, a discrete manner, which makes it easier to press the set position on the workpiece 30 awaiting welding and ensures the welding effect at the set position on the workpiece 30 awaiting welding.

[0085] In some embodiments, first fillets 112 are provided on both edges of the welding head 11 along a first direction X, meaning that the edges of the welded end face 111 along the first direction X smoothly transition to the adjacent side surface on the welding head 11 via the first fillets 112, thereby reducing the contact stress between the ends of the welded end face 111 along the first direction X and the workpiece 30 when the welded end face 111 presses against the workpiece 30 awaiting welding, and thus better protecting the workpiece 30 awaiting welding.

[0086] In some embodiments, a second fillet 113 is provided on the edges along both ends of the welding head 11 that are perpendicular to the first direction X and perpendicular to the longitudinal direction of the welding head 11, that is, the edges along both ends of the welded end face 111 that are perpendicular to the third direction Y smoothly transition to the adjacent side surface on the welding head 11 via the second fillet 113, thereby providing a second fillet 113 on the edges along both ends of the welding head 11 that are perpendicular to the first direction X, reducing contact stress between the ends of the welded end face 111 that are perpendicular to the third direction Y and the workpiece 30 awaiting welding, and thus better protecting the workpiece 30 awaiting welding.

[0087] In some embodiments, the radius of the first fillet 112 is larger than the radius of the second fillet 113. By making the radius of the first fillet 112 relatively large, the extruding force on the workpiece 30 by the first fillet 112 can be reduced when the welding head 11 tilts along the first direction X under the reaction force of the workpiece 30 awaiting welding. By making the radius of the second fillet 113 relatively small, the volume of the welding head 11 can be reduced, and the ultrasonic vibration energy of the processing mechanism 10 can be more concentrated to facilitate welding.

[0088] Referring to Figure 6 in some embodiments, Figure 6 is a schematic diagram of the structure of the welding head 11 portion of the machining mechanism 10 in some embodiments of the present application. Along the first direction X, from the middle to both ends of the welded end face 111, the height to which the welding teeth 12 protrude from the welded end face 111 is set to gradually decrease. In other words, the height to which the welding teeth 12 protrude from the welded end surface 111 from the intermediate surface 110 to both ends of the welding head 11 gradually decreases. That is, in the direction from the middle to both ends in the first direction X of the welded end surface 111, the height to which the welding tooth 12 closer to the middle in the first direction X of the welded end surface 111 protrudes from the welded end surface 111 is smaller than the height to which the other welding tooth 12 protrudes from the welded end surface 111. That is, for both sides of the intermediate surface 110 in the first direction X of the welded end surface 111, for example, the welding teeth 12 on the first region 1111 and the welding teeth 12 on the second region 1112, the height to which the welding tooth 12 closer to the intermediate surface 110 protrudes from the welded end surface 111 is smaller than the height to which the welding tooth 12 further away from the intermediate surface 110 protrudes from the welded end surface 111. As a result, the far surface 122 is gradually bent from the intermediate surface 110 toward both ends of the welding head 11 toward the weld end surface 111, thereby reducing the force exerted on the workpiece 30 when the weld end surface 111 pushes against it, when the welding head 11 vibrates and tilts, and when the welding teeth 12 tilt together with the welding head 11. Furthermore, the risk of cracks appearing in the front or rear of the weld area 31 can be better avoided or reduced.

[0089] Referring to Figure 7 in some embodiments, Figure 7 is a schematic diagram of the structure of the welding head 11 portion of the machining mechanism 10 in some embodiments of the present application. Along the first direction X, from the middle to both ends of the welded end face 111, the height to which the welding teeth 12 protrude from the welded end face 111 is set to gradually increase. In other words, the height to which the welding teeth 12 protrude from the welded end face 111 from the intermediate surface 110 to both ends of the welding head 11 gradually increases. That is, in the direction from the middle to both ends in the first direction X of the welded end face 111, the height to which the welding tooth 12 closer to the middle in the first direction X of the welded end face 111 protrudes from the welded end face 111 is greater than the height to which the other welding tooth 12 protrudes from the welded end face 111. That is, for both sides of the intermediate surface 110 in the first direction X of the welded end face 111, for example, the welding teeth 12 on the first region 1111 and the welding teeth 12 on the second region 1112, the height to which the welding tooth 12 closer to the intermediate surface 110 protrudes from the welded end face 111 is greater than the height to which the welding tooth 12 further away from the intermediate surface 110 protrudes from the welded end face 111. As a result, the distance from the far surface 122 to the weld mark end surface 111 gradually increases from the intermediate surface 110 to both ends of the welding head 11. When the weld mark end surface 111 presses against the workpiece 30 awaiting welding, the welding teeth 12 at the end can be pressed more deeply into the workpiece 30 awaiting welding, increasing the pressing force of the weld mark region 31 against the workpiece 30 awaiting welding, thereby stabilizing the workpiece 30 awaiting welding, and allowing the workpiece 30 awaiting welding to vibrate more smoothly.

[0090] For the sake of clarity, the following definition is used: The point on the welding tooth 12 that is furthest from the welded end face 111 along the second direction Z is the farthest point 123. In other words, the farthest point 123 on the welding tooth 12 is the point with the greatest distance from the welded end face 111 along the second direction Z. The surface on which multiple farthest points 123 are located is the farthest surface 124. The farthest surface 124 can reflect the distance between the welding tooth 12 on the welded end face 111 and the workpiece 30 awaiting welding.

[0091] Referring to Figure 8 in some embodiments, Figure 8 is a schematic diagram of the structure of the welding head 11 portion of the processing mechanism 10 in some embodiments of the present application. The far end surface 124 is a flat surface and is perpendicular to the second direction Z. As a result, when the welding head 11 approaches the workpiece 30 awaiting welding, the multiple welding teeth 12 can contact and press the workpiece 30 awaiting welding almost simultaneously, and especially for workpieces 30 awaiting welding with relatively high hardness, the deformation of the workpiece 30 awaiting welding is small, and the pressing force of the welding head 11 on the workpiece 30 awaiting welding is balanced.

[0092] Referring to Figures 9 and 10, Figure 9 is a schematic diagram of the structure of the welding head 11 portion of the processing mechanism 10 in some embodiments of the present application. Figure 10 is a schematic diagram of the structure of the welding head 11 portion of the processing mechanism 10 in some other embodiments of the present application.

[0093] In some embodiments, referring to Figures 9 and 10, the bending width of the first region 1111 is greater than the bending width of the second region 1112. The bending width of the first region 1111 refers to the radians of bending from the intermediate surface 110 to the end of the first region 1111 along the first direction X, and toward the middle of the longitudinal direction of the welding head 11. The bending width of the second region 1112 refers to the radians of bending from the intermediate surface 110 to the end of the second region 1112 along the first direction X, and toward the middle of the longitudinal direction of the welding head 11. The bending width of the first region 1111 is greater than the bending width of the second region 1112, and the bending deformation of the first region 1111 is greater than the bending deformation of the second region 1112, with respect to the weld end face 111 in the direction from the intermediate surface 110 to both ends along the first direction X. When the welding head 11 tends to tilt towards the second region 1112 during welding, by making the bending width of the first region 1111 larger than the bending width of the second region 1112, the pressing force on the workpiece 30 awaiting welding by both ends of the welded end face 111 along the first direction X can be reduced, effectively protecting the workpiece 30 awaiting welding and avoiding or reducing the risk of cracks appearing in the front or rear of the welded region 31. Furthermore, for workpieces awaiting welding 30 with uneven thickness, the thicker side of the workpiece 30 awaiting welding can be placed in the corresponding position in the first region 1111. In this way, the pressing force on the workpiece 30 awaiting welding by the welded end face 111 is balanced, resulting in a more uniform and stronger weld on the workpiece 30 awaiting welding.

[0094] In some embodiments, referring to Figure 9, the first region 1111 is located on the front side of the intermediate surface 110 along the first direction X, and the second region 1112 is located on the rear side of the intermediate surface 110 along the first direction X.

[0095] In some embodiments, referring to Figure 10, the first region 1111 is located on the rear side of the intermediate surface 110 along the first direction X, and the second region 1112 is located on the front side of the intermediate surface 110 along the first direction X.

[0096] In some embodiments, referring to Figure 11, Figure 11 is a schematic diagram of the structure of the welding head 11 portion of the processing mechanism 10 in some embodiments of the present application. Any two welding teeth 12 on the welded end face 111 are spaced apart to facilitate processing and manufacturing, which reduces the number of welding teeth 12 installed on the welded end face 111, and when the welding teeth 12 press against the workpiece 30 awaiting welding, the extrusion deformation of the workpiece 30 awaiting welding is reduced, thereby better protecting the workpiece 30 awaiting welding.

[0097] For the sake of clarity, the following definition is used: The end of the welded tooth 12 closest to the welded end face 111 is the tooth root 125. The tooth root 125 on the welded tooth 12 is fixed and connected to the welded end face 111 so as to fix the welded tooth 12 to the welded end face 111.

[0098] In some embodiments, the connection point between the tooth root 125 surface and the welded end face 111 exhibits a smooth curved surface, meaning that the tooth root 125 surface and the welded end face 111 are connected with a smooth transition. This reduces stress concentration at the contact point between the tooth root 125 edge and the welded end face 111, ensuring the structural strength of the connection between the welded tooth 12 and the welded end face 111. Furthermore, when the welded tooth 12 and the welded end face 111 press against the workpiece 30 awaiting welding, the corner angle on the workpiece 30 awaiting welding is reduced, thereby better ensuring the structural strength of the workpiece 30 awaiting welding.

[0099] In some embodiments, referring to Figure 11, the region of the welded end face 111 between two adjacent welded teeth 12 is recessed into an arcuate surface 1113, the arcuate surface 1113 is in contact with the edge of the tooth root 125, and such a structure better ensures that the edge of the tooth root 125 and the welded end face 111 are set with a smooth transition, reducing stress concentration at the contact point between the edge of the tooth root 125 and the welded end face 111, and ensuring the structural strength of the connection between the welded tooth 12 and the welded end face 111.

[0100] In some embodiments, referring to Figure 12, both ends of the weld end face 111 along the first direction X may transition to adjacent sides via a corner angle to reduce the volume of the weld head 11. To understand this, one end of the weld end face 111 along the first direction X may transition to an adjacent side via a corner angle, and the other end of the weld end face 111 along the first direction X may transition to an adjacent side via a first fillet 112.

[0101] In some embodiments, referring to Figure 12, both ends of the weld end face 111 along the third direction Y may transition to adjacent sides via a corner angle to reduce the volume of the weld head 11. As can be understood, one end of the weld end face 111 along the third direction Y may transition to an adjacent side via a corner angle, and the other end of the weld end face 111 along the third direction Y may transition to an adjacent side via a second fillet 113.

[0102] Referring to Figures 13 to 16, Figure 13 is a schematic diagram of the structure of the welded tooth 12 of the machining mechanism 10 in some embodiment of the present application. Figure 14 is a schematic diagram of the structure of the welded tooth 12 of the machining mechanism 10 in some other embodiment of the present application. Figure 15 is a schematic diagram of the structure of the welded tooth 12 of the machining mechanism 10 in yet another embodiment of the present application. Figure 16 is a schematic diagram of the structure of the welded tooth 12 of the machining mechanism 10 in some further embodiment of the present application.

[0103] In some embodiments, referring to Figure 13, the welding tooth 12 exhibits a spherical portion. Referring also to Figure 12, that is, the surface on which the welding tooth 12 protrudes from the weld end face 111 is spherical. The welding tooth 12 may also be hemispherical. Of course, the welding tooth 12 may be smaller than a hemisphere (i.e., the total volume of the welding tooth 12 is smaller than the shape of a hemisphere). As can be understood, the welding tooth 12 may also be larger than a hemisphere (i.e., the total volume of the welding tooth 12 is larger than the shape of a hemisphere). Using a spherical portion of the welding tooth 12 when pushing out the workpiece 30 awaiting welding can reduce contact stress on the workpiece 30 awaiting welding and reduce damage to the workpiece 30 awaiting welding.

[0104] In some embodiments, as shown in Figure 14, the welding teeth 12 have a trapezoidal shape. By arranging the welding teeth 12 in a trapezoidal shape, it is possible to better press the workpiece 30 awaiting welding, reduce the contact stress on the workpiece 30 from the periphery of the welding teeth 12, and ensure good structural strength of the welding teeth 12.

[0105] In some embodiments, referring to Figures 15 and 16, the welding teeth 12 have a tapered shape. In Figure 15, the welding teeth 12 have a square pyramidal shape. In Figure 16, the welding teeth 12 have a triangular pyramidal shape. In other words, the cross-section of the tooth root 125 of the welding teeth 12 may have a polygonal shape such as a triangle, square, or pentagon. By providing the welding teeth 12 in a tapered shape, the workpiece 30 awaiting welding can be fixed more securely.

[0106] In some embodiments, among the multiple welding teeth 12 on the welded end face 111, some of the welding teeth 12 may be trapezoidal, and some of the welding teeth 12 may be spherical. Of course, some of the welding teeth 12 may be trapezoidal, and some of the welding teeth 12 may be tapered. Of course, some of the welding teeth 12 may be spherical, and some of the welding teeth 12 may be tapered. To understand, some of the welding teeth 12 may be spherical, some of the welding teeth 12 may be trapezoidal, and some of the welding teeth 12 may be tapered. In other words, the welding teeth 12 may be one or more of a spherical, trapezoidal, and tapered shape. When the shapes of the welding teeth 12 vary, the combination of welding teeth 12 of various shapes can be used to push out and fix the workpiece 30 awaiting welding, thereby ensuring a welding effect.

[0107] According to some embodiments of this application, the application further provides an ultrasonic welding apparatus 100 including the processing mechanism 10 described in any one of the above-described solutions.

[0108] According to some embodiments of this application, a processing mechanism 10 is provided, which includes a welding head 11, one end of which has a welded end face 111, and the welded end face 111 is provided with a plurality of welding teeth 12. The welded end face 111 is bent to form an arc, and the welding teeth 12 are distributed perpendicular to the welded end face 111, so that deformation along the vibration direction of the welding head 11 can be canceled out due to insufficient rigidity of the welding head 11. The arc design of the welded end face 111 allows the contact area between the welding head 11 and the workpiece 30 awaiting welding to remain the same or close at all times during the operating process, avoiding or reducing the risk of cracks appearing in the front or rear of the welded area 31 and reducing the risk of the workpiece 30 awaiting welding being pushed out and cut by the welded end face 111.

[0109] Finally, it should be noted that the embodiments described above are merely illustrative of the technical concepts of this application and do not limit them. While the application has been described in detail with reference to the embodiments described above, those skilled in the art will understand that the technical concepts described in the embodiments can still be modified, or some or all of their technical features can be replaced with equivalents. Such modifications or replacements do not deviate the essence of the relevant technical concepts from the scope of the technical concepts in each embodiment of this application, and should all be included within the scope of the claims and specification of this application. In particular, unless there is a structural conflict, the technical features referred to in each embodiment can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but encompasses all technical concepts included within the claims. [Explanation of symbols]

[0110] Here, the symbols in the figure are: 100- Ultrasonic welding equipment, 10 - Machining mechanism, 11 - Welding head, 110 - Intermediate surface, 111 - Welded end surface, 1111 - First region, 1112 - Second region, 112 - First fillet, 113 - Second fillet, 12 - Welding tooth, 121 - Far point, 122 - Far surface, 123 - Far end point, 124 - Far end surface, 125 - Tooth root, 13 - Support body, 21-Welding base, 22-Holder, 30 - Workpiece awaiting welding, 31 - Welding area, X - first direction, Z - second direction, Y - third direction.

Claims

1. A processing mechanism, A welding head, wherein one end of the welding head along a second direction has a welded end face, and the middle portion of the welded end face along a first direction is positioned to project away from the welding head so as to bend the welded end face in an arch shape, and the arched welded end face is parallel to the welding head along a third direction. A welding tooth, wherein a plurality of welding teeth include welding teeth distributed on the welded end face, A machining mechanism characterized in that the first direction is parallel to the reciprocating direction in which the welding head vibrates back and forth during welding, the second direction is the longitudinal direction of the welding head, the second direction is perpendicular to the first direction, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

2. The processing mechanism according to claim 1, characterized in that the cross section of the welded end face parallel to the first direction is arc-shaped or smooth curved.

3. The plane passing through the middle portion of the welding head along the first direction and perpendicular to the first direction is an intermediate plane, and the two opposing sides of the intermediate plane on the weld end face are a first region and a second region, respectively. The processing mechanism according to claim 1, characterized in that the first region and the second region are arranged symmetrically with respect to the intermediate surface, or the bending width of the first region is greater than the bending width of the second region.

4. The machining mechanism according to claim 1, wherein the point on the welded tooth furthest from the welded end face in a direction perpendicular to the welded end face is a far-distance point, the surface on which the plurality of far-distance points are located is a far-distance surface, and the middle portion of the far-distance surface along the first direction is set to protrude so as to bend the far-distance surface in an arch shape.

5. The processing mechanism according to claim 4, characterized in that the distant surface is parallel to the welded end surface.

6. The processing mechanism according to claim 5, characterized in that the height to which each of the welding teeth protrudes from the end face of the welded area is equal.

7. In the direction from the middle to both ends in the first direction of the welded end face, the height at which the welding teeth protrude from the welded end face is set to gradually increase. Alternatively, the processing mechanism according to claim 1, characterized in that the height to which the welding teeth protrude from the welded end face is gradually reduced in the direction from the middle to both ends in the first direction of the welded end face.

8. The machining mechanism according to claim 1, characterized in that the point on the welded tooth furthest from the welded end face along the second direction is the far end point, the surface on which the plurality of far end points are located is the far end surface, the far end surface is a plane, and the second direction is perpendicular to the far end surface.

9. The processing mechanism according to claim 1, characterized in that any two adjacent welding teeth on the welded end face are spaced apart.

10. The processing mechanism according to claim 9, characterized in that the end of the welded tooth closest to the welded end face is the tooth root, and the connection point between the surface of the tooth root and the welded end face exhibits a smooth curved surface.

11. The machining mechanism according to claim 10, characterized in that the region between two adjacent welded teeth on the welded end face is recessed into an arcuate surface, and the arcuate surface is in contact with the edge of the tooth root.

12. The processing mechanism according to claim 1, characterized in that the plurality of welding teeth are arranged in a matrix on the welded end face.

13. The processing mechanism according to claim 1, characterized in that first fillets are provided on the edges of both ends of the welding head along the first direction, and / or second fillets are provided on the edges of both ends of the welding head along the third direction.

14. The machining mechanism according to claim 1, characterized in that the welding teeth exhibit one or more of the following shapes: a part of a sphere, a trapezoid, and a tapered shape.

15. The processing mechanism according to claim 1, further comprising a support body, wherein the welding head is attached to the support body.

16. An ultrasonic welding apparatus, characterized in that it includes a processing mechanism described in any one of claims 1 to 15.

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