Processing mechanism and ultrasonic welding device

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 priority to a Chinese patent application submitted to the China Patent Office on November 30, 2022, bearing application number 202223187079.2 and titled "Processing mechanism and ultrasonic welding device", the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of ultrasonic welding, and more particularly to a processing mechanism and an ultrasonic welding device. [Background technology]

[0003] The description herein does not necessarily constitute prior art, but merely provides background information for the present application. In an ultrasonic welding device, generally, welding teeth are installed on the working plane of a welding head, which contacts the workpiece to be welded and vibrates back and forth ultrasonically, so that the workpieces to be welded are heated by ultrasonic vibration friction and welded together. When the welding head contacts the workpiece to be welded and vibrates back and forth, a counter-direction acting force is generated on the welding head, so that the welding head is tilted relative to the welding base. As a result, when the ultrasonic welding device is used to weld thin workpieces such as foil materials, for example, to weld a battery tab to an adapter, cracks are generated at the front or rear of the weld mark area, and the workpieces are easily cut off. Summary of the Invention [Problem to be solved by the invention]

[0004] The purpose of the embodiments of the present application is to provide a processing mechanism and an ultrasonic welding device to solve the problem in related art that when an ultrasonic welding device welds a thin workpiece, cracks may occur at the front or rear of the weld area, and thus the workpiece may be easily cut. [Means for solving the problem]

[0005] The technical solutions adopted in the embodiments of the present application are as follows:

[0006] According to a first aspect, an embodiment of the present application provides a processing mechanism, the processing mechanism including a welding head, one end of the welding head along a second direction having a weld mark end surface, and a middle portion of the weld mark end surface along the first direction protruding toward a direction away from the welding head so as to bend the weld mark end surface in an arch shape, and welding teeth, the welding teeth including a plurality of welding teeth distributed on the weld mark end surface, the first direction being parallel to a reciprocating movement direction in which the welding head reciprocates during welding use, the second direction being a longitudinal direction of the welding head, and the second direction being perpendicular to the first direction.

[0007] In the technical proposal of the embodiment of the present application, the weld mark end face of the welding head is installed in an arch shape, so that the middle part along the first direction of the weld mark end face is installed to protrude, so that when the weld mark end face presses against the workpiece to be welded and vibrates the workpiece to be welded back and forth along the first direction, when the weld mark end face is inclined due to frictional force, the front or rear part of the weld mark end face in the reciprocating vibration direction is bent toward the direction away from the workpiece to be welded, thus reducing the pressing force of the front or rear part of the weld mark end face in the reciprocating vibration direction against the workpiece to be welded, thereby avoiding or reducing the risk of cracks appearing at the front or rear of the weld mark area, effectively protecting the workpiece to be welded, and reducing the risk of the workpiece to be welded being pushed out and cut by the weld mark end face.

[0008] In some embodiments, a cross section of the weld mark end surface parallel to the first direction exhibits an arc shape or a smooth curve shape.

[0009] By installing the above structure, the corner angle caused by contact between the end face of the weld mark and the workpiece waiting to be welded can be reduced, thereby preventing the problem of cracks in the workpiece waiting to be welded due to corner corner pressure.

[0010] In some embodiments, a plane passing through a middle portion of the weld head along the first direction and perpendicular to the first direction is an intermediate surface, and opposite sides of the intermediate surface of the weld mark end surface are a first region and a second region, respectively; The first region and the second region are disposed symmetrically about the midplane, or the bending width of the first region is greater than the bending width of the second region.

[0011] With the above-mentioned structure, the first area and the second area are symmetrically arranged with respect to the mid-plane, so that the pressing forces on the weld mark end faces received by both ends of the workpiece to be welded in the first direction are balanced, and the welding of the workpiece to be welded is more uniform and strong; when the welding head is prone to tilt toward the second area during welding, the bending width of the first area is made larger than the bending width of the second area, so that the pressing forces on the workpiece to be welded by both ends along the first direction of the weld mark end faces can be reduced, effectively protecting the workpiece to be welded, and avoiding or reducing the risk of cracks appearing at the front or rear of the weld mark area; and for workpieces to be welded with uneven thickness, the thicker side of the workpiece to be welded can be placed in the corresponding position of the first area, so that the pressing forces on the workpiece to be welded by the weld mark end faces are balanced, and the welding of the workpiece to be welded is more uniform and strong.

[0012] In some embodiments, a point on the weld tooth farthest from the weld mark end surface along a direction perpendicular to the weld mark end surface is a far-distance point, a surface on which the plurality of far-distance points are located is a far-distance surface, and a middle portion of the far-distance surface along the first direction is disposed protrudingly to bend the far-distance surface in an arched shape.

[0013] With the above-mentioned structure and installation, the remote surface is bent in an arch shape, and the middle part of the remote surface along the first direction is protruded, so that the end surface of the weld mark and the welding teeth press against the workpiece to be welded, and the acting force of the welding teeth pressing against the workpiece to be welded is balanced, so that the end surface of the weld mark and the welding teeth can better vibrate back and forth against the workpiece to be welded.

[0014] In some embodiments, the far-field plane is parallel to the weld scar edge plane.

[0015] With the above-mentioned structure, the far-distance surface is parallel to the end surface of the weld mark, and the distance from each weld tooth to the end of the weld mark can be shortened to facilitate the design and processing of the weld teeth. Furthermore, the weld mark end surface and the weld teeth press against the workpieces awaiting welding, thereby shortening the distance at which the weld teeth press into the workpieces awaiting welding, and the acting force of the weld teeth on the workpieces awaiting welding is balanced, so that the weld mark end surface and the weld teeth can better vibrate back and forth against the workpieces awaiting welding.

[0016] In some embodiments, the height that each weld tooth protrudes from the weld mark end surface is equal.

[0017] The above-mentioned structure and installation facilitates the design and processing of the welding teeth, makes the distance over which the welding teeth press into the workpieces awaiting welding equal, and balances the force acting on the workpieces awaiting welding by the welding teeth, so that the end surfaces of the weld marks and the welding teeth can better vibrate back and forth on the workpieces awaiting welding.

[0018] In some embodiments, the height of the weld teeth protruding from the weld spot end surface is gradually increased in a direction from the middle to both ends in the first direction of the weld spot end surface; Alternatively, the height at which the weld teeth protrude from the weld trace end surface is gradually reduced in a direction from the middle to both ends in the first direction of the weld trace end surface.

[0019] The above structure allows the welding teeth on both sides of the weld mark end face to be gradually reduced in height from the weld mark end face, so that when the weld mark end face presses the workpiece to be welded and the welding head vibrates and tilts, the welding teeth will be pushed out of the workpiece to be welded due to the tilt of the welding head together with the welding head, and the risk of cracks appearing at the front or rear of the weld mark area can be better avoided or reduced. The welding teeth on both sides of the weld mark end face to be gradually increased in height from the weld mark end face, so that when the weld mark end face presses the workpiece to be welded, the welding teeth at the end can be pressed into the workpiece to be welded more, increasing the pressing force against the workpiece to be welded and stabilizing the workpiece to be welded, thereby better vibrating the workpiece to be welded back and forth.

[0020] In some embodiments, a point of the weld tooth farthest from the weld scar end surface along the second direction is a distal point, a surface on which the plurality of distal points are located is a distal surface, the distal surface is a plane, and the second direction is perpendicular to the distal surface.

[0021] With the above-mentioned structure, the multiple welding teeth can contact and press against the workpieces awaiting welding almost simultaneously, and deformation of the workpieces awaiting welding is small, particularly for workpieces awaiting welding that have a relatively high hardness, and the welding head pressing force received by the workpieces awaiting welding can be balanced.

[0022] In some embodiments, any two adjacent weld teeth on the weld mark end surface are spaced apart.

[0023] With the above-mentioned structure, the number of welding teeth can be reduced to facilitate processing and manufacturing, and when the welding teeth press the workpiece to be welded, the extrusion deformation of the workpiece to be welded can be reduced, and the workpiece to be welded can be better protected.

[0024] In some embodiments, the end of the weld tooth proximate the weld mark end surface is a root, and the connection between the root surface and the weld mark end surface presents a smoothly curved surface.

[0025] The above-mentioned structural installation reduces stress concentration at the contact point between the tooth root edge and the weld mark end face, thereby ensuring the structural strength of the connection between the weld tooth and the weld mark end face; and when the weld tooth and the weld mark end face press against the workpiece to be welded, the corner angle on the workpiece to be welded is reduced, thereby better ensuring the structural strength of the workpiece to be welded.

[0026] In some embodiments, the area of ​​the weld scar between two adjacent weld teeth is recessed into an arcuate surface, and the arcuate surface meets the root edge.

[0027] The above-mentioned structural installation can better reduce the stress concentration at the contact point between the tooth root edge and the weld mark end surface, thereby ensuring the structural strength of the connection between the weld tooth and the weld mark end surface.

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

[0029] The above-mentioned structure and installation can facilitate the design layout of the welding teeth and facilitate the processing and manufacturing of the welding teeth.

[0030] In some embodiments, the welding head has a first fillet on both ends of an edge along a first direction and / or a second fillet on both ends of the edge along a third direction perpendicular to a third direction, the third direction being perpendicular to the first direction and the third direction being perpendicular to the second direction.

[0031] With the above structure, the edges of both ends of the welding head along the first direction are provided with first fillets, which can reduce the contact stress between both ends of the welding mark end face along the first direction and the workpiece to be welded when the welding mark end face presses the workpiece to be welded, and the edges of both ends of the welding head along the third direction are provided with second fillets, which can reduce the contact stress between both ends of the welding mark end face along the third direction and the workpiece to be welded, and the workpiece to be welded can be better protected.

[0032] In some embodiments, the weld tooth exhibits one or more of a partial sphere, a trapezoid, and a tapered shape.

[0033] The above structure and installation can facilitate the design and layout of the welding teeth. By providing the welding teeth on a part of a sphere, the contact stress on the workpiece to be welded can be reduced, and damage to the workpiece to be welded can be reduced. By providing the welding teeth on a circular trapezoid, the workpiece to be welded can be better pressed, and the contact stress on the peripheral side of the welding teeth on the workpiece to be welded 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-mentioned structural installation, the support body can be installed to easily support the welding head, thus facilitating the installation and fixing of the welding head and facilitating the use of the welding head.

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

[0037] The above description is only an outline of the technical solution of the present application, which can be implemented in accordance with the contents of the specification, in order to make the technical means of the present application more clearly understood, and in order to make the above and other objectives, features and advantages of the present application more obvious and understandable, the following particularly cites specific embodiments of the present application for description.

[0038] In order to more clearly explain the technical solutions in the embodiments of the present application, the following briefly introduces drawings that need to be used in the embodiments or exemplary technical description. It is obvious that the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings without exerting creative efforts. [Brief description of the drawings]

[0039] [Figure 1] 1 is a perspective structural schematic diagram of an ultrasonic welding apparatus according to some embodiments of the present application. [Diagram 2] 1 is a side structural schematic diagram of an ultrasonic welding apparatus according to some embodiments of the present application. [Diagram 3] FIG. 2 is a perspective structural schematic diagram of a processing mechanism according to some embodiments of the present application. [Figure 4] 4 is a schematic perspective view of a welding head portion of the processing mechanism shown in FIG. 3. [Diagram 5] 5 is a schematic side view of the welding head portion shown in FIG. 4. [Figure 6]11A to 11C are structural schematic diagrams of a welding head portion of a processing mechanism according to some other embodiments of the present application. [Figure 7] 11 is a structural schematic diagram of a welding head portion of a processing mechanism according to still another embodiment of the present application. FIG. [Figure 8] 11A-11C are structural schematic diagrams of the welding head portion of the processing mechanism of further some embodiments of the present application. [Figure 9] 2 is a structural schematic diagram of a welding head portion of a processing mechanism according to some embodiments of the present application; FIG. [Figure 10] 11 is a structural schematic diagram of a welding head portion of a processing mechanism according to still another embodiment of the present application. FIG. [Figure 11] 11A-11C are structural schematic diagrams of the welding head portion of the processing mechanism of further some embodiments of the present application. [Figure 12] 11A to 11C are structural schematic diagrams of a welding head portion of a processing mechanism according to some other embodiments of the present application. [Figure 13] FIG. 2 is a structural schematic diagram of a welding tooth of a processing mechanism according to some embodiments of the present application. [Figure 14] 11A to 11C are structural schematic diagrams of the welding teeth of the processing mechanism of some other embodiments of the present application. [Figure 15] FIG. 11 is a structural schematic diagram of a welding tooth of a processing mechanism according to still another embodiment of the present application. [Figure 16] 11A-11C are structural schematic diagrams of the welding teeth of the processing mechanism of further some embodiments of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] In order to make the technical problems, technical solutions and beneficial effects that the present application aims to solve clearer, the present application will be described in more detail in conjunction with the following drawings and examples. It should be understood that the specific examples described herein are only used to interpret the present application, and are not used to limit the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art of the present application, and the terms used herein are merely for describing specific embodiments and are not intended to limit the present application, and the terms "including" and "having" and any variations thereof in the specification and claims of this application and the description of the drawings above are intended to cover the non-exclusive "including".

[0042] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only intended to distinguish different objects, and cannot be understood to indicate or imply relative importance, or to imply the number, specific order, or hierarchical relationship of the technical features described, whereby a feature qualified as "first" or "second" may explicitly or implicitly include one or more of said features.

[0043] An "embodiment" referred to in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of this phrase in various locations in the specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive independent or alternative embodiments from other embodiments. Those skilled in the art will understand, explicitly or implicitly, that the embodiments described herein can be combined with other embodiments in any suitable manner.

[0044] In the description of the embodiments of the present 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, and B alone. In addition, the character " / " in this specification generally indicates that the related objects before and after are in an "or" relationship.

[0045] In the description of the embodiments of the present application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple sheets" refers to two or more (including two sheets). "Some" means one or more than one, unless otherwise specified.

[0046] In describing the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," "circumferential direction," and the like are orientations or positional relationships shown based on the drawings, and are intended to describe and simplify the embodiments of the present application, and are not intended to indicate or imply that the devices or elements referred to have a specific orientation and must be configured and operated in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise clearly defined or limited, the technical terms "attached", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may refer to, for example, a fixed connection, a removable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present application according to the specific circumstances.

[0048] In the description of the embodiments of the present application, unless otherwise clearly stated or limited, when an element is referred to as being "fixed" or "mounted" to another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being "connected" to another element, it may be directly connected to the other element or indirectly connected to the other element.

[0049] In the description of the embodiments of the present application, unless otherwise clearly defined or limited, the technical term "adjacent" means positionally close. For example, there are three members A1, A2, and B, and the distance between A1 and B is greater than the distance between A2 and B, and A2 is closer to B than A1, i.e., A2 is adjacent to B, and B is adjacent to A2. Also, for example, there are multiple C members, and the multiple C members are respectively C1, C2...C. N and 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 referred to in the embodiments of the present application is also called an electrode assembly, and is a component for manufacturing a battery cell. The battery cell is a component for manufacturing a battery. That is, a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. The 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 cell may be used directly, that is, the battery may not include a housing, and is not limited here.

[0051] In the embodiment of the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., and the embodiment of the present application is not limited thereto. The battery cell may have a cylindrical shape, a flat shape, a rectangular shape, or other shapes, and the embodiment of the present application is not limited thereto. Generally, the battery cell is divided into three types, namely, a cylindrical battery cell, a rectangular battery cell, and a pouch battery cell, according to the packaging method, and the embodiment of the present application is not limited thereto.

[0052] In the embodiment of the present application, the battery cell includes an electrode assembly, which is composed of a positive electrode plate, a negative electrode plate, and a separator. The electrode assembly mainly operates by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode collector, and the part of the positive electrode collector that is not coated with the positive electrode active material layer protrudes from the part that is already coated with the positive electrode active material layer, and the part that is not coated with the positive electrode active material layer is used as a positive electrode tab, or a metal conductor is welded to the positive electrode collector as a positive electrode tab and pulled out. Taking a lithium ion battery as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode plate includes a negative electrode collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode collector. The part of the negative electrode collector where the negative electrode active material layer is not coated protrudes from the part where the negative electrode active material layer is coated, and the part where the negative electrode active material layer is not coated is used as a negative electrode tab, or a metal conductor is welded to the negative electrode collector as a negative electrode tab and drawn out. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that the large current does not melt, the number of positive electrode tabs is multiple and stacked, and the number of negative electrode tabs is multiple and stacked. The positive electrode tabs and the negative electrode tabs are generally collectively called tabs.

[0053] In order to energize the battery cell, the battery cell is often provided with an electrode terminal. The electrode terminal is a conductive member on the battery cell, which is connected to a tab of an electrode assembly and outputs electrical energy from the battery cell or charges the battery cell.

[0054] An adapter is a conductive piece that connects a tab and an electrode terminal of a battery cell. An adapter is often installed to connect the electrode terminal and the tab. In order to ensure the strength of the connection between the adapter and the tab, the adapter and the tab are often connected by welding, thereby ensuring good conductive performance, and therefore the welding effect between the adapter and the tab is very important for the battery cell.

[0055] Ultrasonic welding, also known as ultrasonic welding, is a method of ultrasonically reciprocatingly vibrating the workpieces to be welded by driving a welding head through an ultrasonic welding device, so that the workpieces to be welded rub against each other and generate heat, and the contact points of the workpieces to be welded generate heat, melt, and are welded together. Ultrasonic welding can weld thin workpieces such as foil materials, and can be used, for example, to weld a tab and an adapter.

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

[0057] In particular, for the welding of the tab and the adapter, the connection area between the tab and the adapter is an area through which current passes (i.e., an overcurrent area), so if a crack appears at the front or rear of the welded area, the current area of ​​the tab and the adapter will be affected, the internal resistance will increase, and the performance of the battery core will be affected, and the front or rear of the welded area between the tab and the adapter will be cut, leading to direct failure of the battery core.

[0058] Based on the above problem, the inventor of the present application has found through research that during ultrasonic welding, the welding head needs to vibrate the workpiece to be welded back and forth, so that during welding, the workpiece to be welded needs to be supported on a welding base, and the end surface of the welding head's weld mark presses the workpiece to be welded, and the workpiece to be welded needs to be vibrated back and forth. When the welding head vibrates the workpiece to be welded back and forth, it receives a reverse acting force from the workpiece to be welded. This reverse acting force causes the welding head to be tilted forward or backward along the reciprocating vibration direction, so that the end surface of the welding mark on the welding head is tilted forward or backward along the reciprocating vibration direction, and one end of the weld mark end surface along the reciprocating vibration direction pushes the workpiece to be welded toward the welding base. Currently, the end surface of the weld mark is generally flat, so when one end of the weld mark end surface along the reciprocating vibration direction pushes out the workpiece to be welded, the front or rear of the weld mark area is recessed toward the weld base, resulting in greater deformation. For thin workpieces to be welded, such as the welding of a tab and an adapter of a battery core, such pushing out can cause cracks to appear at the front or rear of the contact area between the workpiece to be welded and the welding head (i.e., the weld mark area), and in serious cases, the workpiece to be welded can even be cut.

[0059] Based on the above findings, an embodiment of the present application provides a processing mechanism in which the end face of the weld mark on the welding head of the processing mechanism is arranged in an arch shape protruding along the middle of the reciprocating vibration direction, so that when the welding head tilts forward or backward in the reciprocating vibration direction, the bending arrangement of both ends of the weld mark end face reduces the pushing force on the workpiece to be welded, thereby reducing or avoiding the risk of cracks appearing at the front or rear of the weld mark area on the workpiece to be welded, and further effectively preventing the workpiece to be welded 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 an ultrasonic welding device according to some embodiments of the present application. Figure 2 is a schematic side view of an ultrasonic welding device according to some embodiments of the present application. Figure 3 is a schematic perspective view of a processing mechanism according to some embodiments of the present application. Figure 4 is a schematic perspective view of a welding head part of a processing mechanism according to some embodiments of the present application. Figure 5 is a schematic side view of a welding head part according to some embodiments of the present application.

[0061] The ultrasonic welding device 100 includes a welding base 21 and a processing mechanism 10. The welding base 21 is a member for supporting the workpieces 30 waiting to be welded. The processing mechanism 10 is a member for pressing the workpieces 30 waiting to be welded against the welding base 21 and reciprocatingly vibrating the workpieces 30 waiting to be welded. During use, before placing the workpieces 30 waiting to be welded on the welding base 21 and the processing mechanism 10, the processing mechanism 10 presses the workpieces 30 waiting to be welded against the welding base 21, and the processing mechanism 10 vibrates reciprocally to vibrate the workpieces 30 waiting to be welded, causing friction between the workpieces 30, generating heat, and welding the workpieces 30 together.

[0062] In some embodiments, the ultrasonic welding apparatus 100 further includes a holder 22 to which the welding base 21 is attached, the holder 22 supporting and positioning the welding base 21 and facilitating the mounting and fixing of the welding base 21 .

[0063] 1 and 3 to 5, the processing mechanism 10 includes a welding head 11, and during welding, the welding head 11 presses against a workpiece 30 waiting to be welded, and vibrates the workpiece 30 back and forth.

[0064] For convenience of description, the following definitions are made. The direction of reciprocating movement when the welding head 11 reciprocates the workpiece 30 to be welded is a first direction, for example, the X direction in the figure, that is, the welding head 11 and the workpiece 30 to be welded reciprocate along the first direction. The direction from the welding head 11 to the welding base 21 is defined as a second direction, for example, the Z direction in the figure, and accordingly, the second direction is also the longitudinal direction of the welding head 11, that is, the Z direction is the longitudinal direction of the welding head 11. A third direction is defined as, for example, the Y direction in the figure, and the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0065] One end of the welding head 11 along the second direction has a weld mark end surface 111, and during welding, the weld mark end surface 111 abuts against the workpiece 30 awaiting welding, that is, the weld mark end surface 111 is the surface of the welding head 11 that is close to the workpiece 30 awaiting welding.

[0066] A plurality of welding teeth 12 are provided on the weld mark end surface 111, that is, the processing mechanism 10 further includes a plurality of welding teeth 12, and the plurality of welding teeth 12 are distributed on the weld mark end surface 111. The welding teeth 12 are provided on the weld mark end surface 111, and when the welding head 11 presses the workpiece 30 to be welded, the welding teeth 12 are pressed into the workpiece 30 to be welded, so as to increase the frictional force between the welding head 11 and the workpiece 30 to be welded, and the workpiece 30 to be welded can be fixed, and the workpiece 30 to be welded can be reciprocatingly vibrated.

[0067] The weld mark end surface 111 is disposed in an arch shape, specifically, the middle part of the weld mark end surface 111 along the first direction X is disposed to protrude so that the weld mark end surface 111 is bent to be disposed in an arch shape. The middle part of the weld mark end surface 111 along the first direction X means a region of the weld mark end surface 111 close to the middle of the weld mark end surface 111 along the first direction X. A central portion of the weld mark end surface 111 in the first direction X protrudes in a direction away from a central portion of the longitudinal direction of the welding head 11; that is, during use, the central portion of the weld mark end surface 111 along the first direction X is installed protruding toward the direction of the workpiece 30 waiting to be welded, and both ends of the weld mark end surface 111 along the first direction X are bent in a direction away from the workpiece 30 waiting to be welded; thus, when the weld mark end surface 111 moves toward the workpiece 30 waiting to be welded, the central portion of the weld mark end surface 111 along the first direction X presses the workpiece 30 waiting to be welded, and when the weld mark end surface 111 presses the workpiece 30 waiting to be welded, the force with which both ends of the weld mark end surface 111 along the first direction X press the workpiece 30 waiting to be welded is smaller than the force with which the central portion of the weld mark end surface 111 along the first direction X presses the workpiece 30 waiting to be welded. When the welding head 11 reciprocates the workpiece 30 to be welded along the first direction X, the workpiece 30 to be welded generates a counter force against the welding head 11 due to friction, and under this counter force, the welding head 11 is deformed by tilting forward or backward along the first direction X, and the welding mark end surface 111 is tilted forward or backward along the first direction X accordingly. The welding mark end surface 111 is set in an arch shape, and both ends of the welding mark end surface 111 along the first direction X are bent toward a direction away from the workpiece 30 to be welded, and when the welding mark end surface 111 is tilted forward or backward along the first direction X, the pushing force of both ends of the welding mark end surface 111 along the first direction X against the workpiece 30 to be welded is not too large, which effectively protects the workpiece 30 to be welded and avoids or reduces the risk of cracks appearing at the front or rear of the welding mark area 31 on the workpiece 30 to be welded.

[0068] In the technical solution of the embodiment of the present application, the weld mark end surface 111 of the welding head 11 is set to have an arch shape, so that the middle part of the weld mark end surface 111 along the first direction X is set to protrude, so that when the weld mark end surface 111 presses against the workpiece to be welded 30 to vibrate the workpiece to be welded 30 back and forth along the first direction X, when the weld mark end surface 111 is tilted due to frictional force, the front or rear part of the weld mark end surface 111 in the reciprocating vibration direction is bent toward the direction away from the workpiece to be welded 30, thus reducing the pressing force of the front or rear part of the weld mark end surface 111 in the reciprocating vibration direction against the workpiece to be welded 30, thereby avoiding or reducing the risk of cracks appearing at the front or rear part of the weld mark area 31, effectively protecting the workpiece to be welded 30, and reducing the risk of the workpiece to be welded 30 being pushed out and cut by the weld mark end surface 111.

[0069] 1 to 3, in some embodiments, 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 member for fixing and supporting the welding head 11 and connecting it to the ultrasonic welding device 100. By installing the support body 13, it is easy to support the welding head 11, 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 of a one-piece structure, which facilitates manufacturing and ensures a strong connection between the welding head 11 and the support body 13. As can be appreciated, the welding head 11 and the support body 13 may be manufactured separately and fixedly connected to each other.

[0071] In some embodiments, the welding heads 11 are mounted on the longitudinal sides of the support body 13, reducing the overall height of the processing mechanism 10. As can be appreciated, the welding heads 11 may also be mounted on the longitudinal end faces of the support body 13.

[0072] In some embodiments, welding heads 11 are provided on opposite longitudinal sides of the support body 13 for replacing the welding heads 11. As can be understood, welding heads 11 may be provided on multiple longitudinal sides of the support body 13. That is, when a welding head 11 is provided on a longitudinal side of the support body 13, a welding head 11 may be provided on one or several other longitudinal sides, and this is not limited thereto.

[0073] In some embodiments, the cross section of the weld mark end surface 111 parallel to the first direction X is arc-shaped, so that the entire weld mark end surface 111 has an arc surface to facilitate processing and manufacturing. The arc-shaped weld mark end surface 111 has no corner angle, so that when the weld mark end surface 111 presses the workpiece 30 to be welded, no corner angle is formed in the weld mark area 31 of the workpiece 30 to be welded by pressing the weld mark end, and the crack problem of the workpiece 30 to be welded due to the pressing of the corner angle is avoided.

[0074] In some embodiments, the cross section of the weld mark end surface 111 parallel to the first direction X may be arranged to present a smooth curved line, that is, the cross section of the weld mark end surface 111 parallel to the first direction X may be arranged to present a curved line, and the curved line may be formed by connecting a plurality of arc segments, thus reducing the corner angle caused by the contact between the weld mark end surface 111 and the workpiece 30 to be welded, and avoiding the problem of cracking the workpiece 30 to be welded due to the corner angle pressing.

[0075] For convenience of description, the following definitions are given: a 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, i.e., the first direction X is a normal direction of the intermediate surface 110, and the intermediate surface 110 is in the middle of the welding head 11 along the first direction X. The portions of the welding mark end surface 111 on both sides opposite to the intermediate surface 110 are a first region 1111 and a second region 1112, respectively, i.e., the welding mark end surface 111 is a first region 1111 and a second region 1112 on both sides opposite to the intermediate surface 110, respectively.

[0076] In some embodiments, referring to FIG. 5 , the first region 1111 and the second region 1112 are installed symmetrically about the intermediate surface 110 to facilitate processing and manufacturing, and when the weld mark end surface 111 presses the workpiece 30 to be welded, the contact forces of the first region 1111 and the second region 1112 on the workpiece 30 to be welded can be equal or close to each other, so that the pressing forces of the weld mark end surface 111 received by both ends of the workpiece 30 to be welded in the first direction X are balanced, making the welding of the workpiece 30 to be welded more uniform and strong, and improving the welding effect.

[0077] For convenience of description, the following definitions are given. The point on the weld tooth 12 that is farthest from the weld mark end surface 111 along the direction perpendicular to the weld mark end surface 111 is the far-distance point 121, that is, the point on the weld tooth 12 that is the greatest distance from the weld mark end surface 111 is the far-distance point 121. The surface on which the multiple far-distance points 121 are located is the far-distance surface 122. The far-distance surface 122 reflects the height installation state where the weld tooth 12 on the weld mark end surface 111 protrudes from the weld mark end surface 111.

[0078] 5, in some embodiments, a middle portion of the far-distance surface 122 along the first direction X is protruding so as to bend the far-distance surface 122 in an arched shape. That is, the far-distance surface 122 is arranged in an arched shape, specifically, a middle portion of the far-distance surface 122 along the first direction X is protruding so as to bend the far-distance surface 122 in an arched shape. A central portion of the remote surface 122 in the first direction X protrudes away from a central portion of the longitudinal direction of the welding head 11; that is, during use, the central portion of the remote surface 122 along the first direction X is installed to protrude toward the workpiece 30 to be welded, and both ends of the remote surface 122 along the first direction X are bent away from the workpiece 30 to be welded, so that the weld mark end surface 111 and the welding teeth 12 press against the workpiece 30 to be welded, the depth at which the weld teeth 12 are pressed into the workpiece 30 to be welded is close, and the force of the welding teeth 12 pressing against the workpiece 30 to be welded is balanced, so that the weld mark end surface 111 and the welding teeth 12 can better vibrate back and forth against the workpiece 30 to be welded.

[0079] 5, in some embodiments, the far surface 122 is parallel to the weld mark end surface 111. In order to facilitate the design and manufacturing of the welding teeth 12, the distance from each welding tooth 12 to the weld mark end can be made close, and the weld mark end surface 111 and the welding teeth 12 press the workpiece 30 to be welded, thereby making the distance at which the welding teeth 12 are pressed into the workpiece 30 to be welded close, so that the acting force of the welding teeth 12 on the workpiece 30 to be welded is balanced, and the weld mark end surface 111 and the welding teeth 12 can better vibrate the workpiece 30 to be welded back and forth.

[0080] In some embodiments, referring to FIG. 5 , the height that each welding tooth 12 protrudes from the weld mark end face 111 is equal, which makes it easier to design and process the welding teeth 12; and when the entire weld mark end face 111 abuts against the workpiece 30 to be welded, the distances by which the welding teeth 12 are pressed into the workpiece 30 to be welded are approximately equal, so that the forces acting on the workpiece 30 to be welded by the welding teeth 12 are balanced, and the weld mark end face 111 and the welding teeth 12 can better vibrate back and forth on the workpiece 30 to be welded.

[0081] In some embodiments, multiple welding teeth 12 are arranged in a matrix on the welding mark end surface 111, i.e., the welding teeth 12 on the welding mark end surface 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 plurality of welding teeth 12 may be arranged in a row along a first direction X for ease of manufacturing, and the plurality of welding teeth 12 may be arranged in a row along a third direction Y. As can be appreciated, the plurality of welding teeth 12 may be arranged in a row with an inclination in the first direction X.

[0083] In some embodiments, the multiple welding teeth 12 may be distributed in an array on the weld mark end surface 111, and the multiple welding teeth 12 are uniformly distributed on the weld mark end surface 111, which facilitates the design and layout of the welding teeth 12, and when the welding teeth 12 press the workpiece 30 to be welded, the pressing force of the welding teeth 12 received by the weld mark area 31 of the workpiece 30 to be welded is more uniform, the welding strength of the weld mark area 31 is uniform, and the welding effect is improved.

[0084] In some embodiments, the multiple welding teeth 12 may be distributed on the weld mark end surface 111, that is, the multiple welding teeth 12 are distributed on the weld mark end surface 111 in a non-uniform manner, for example in a discrete manner, so as to easily press the set position on the workpiece 30 to be welded, and ensure the welding effect of the set position on the workpiece 30 to be welded.

[0085] In some embodiments, the edges of both ends of the welding head 11 along the first direction X are provided with first fillets 112, that is, the edges of both ends of the welding mark end surface 111 along the first direction X smoothly transition to the adjacent side surfaces on the welding head 11 through the first fillets 112, so that when the welding mark end surface 111 presses the workpiece 30 to be welded, the contact stress between the both ends of the welding mark end surface 111 along the first direction X and the workpiece 30 to be welded can be reduced, and the workpiece 30 to be welded can be better protected.

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

[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, when the welding head 11 is tilted along the first direction X under the reaction force of the workpiece 30 to be welded, the pushing force of the first fillet 112 against the workpiece 30 to be welded can be smaller. 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] In some embodiments, referring to Fig. 6, Fig. 6 is a structural schematic diagram of the welding head 11 part of the processing mechanism 10 in some embodiments of the present application. The height of the welding teeth 12 protruding from the welding mark end surface 111 in the direction from the middle to both ends of the welding mark end surface 111 along the first direction X is gradually reduced. In other words, from the intermediate surface 110 to both ends of the welding head 11, the height at which the weld teeth 12 protrude from the weld mark end surface 111 gradually decreases; that is, in the direction from the middle to both ends in the first direction X of the weld mark end surface 111, of any two weld teeth 12, the height at which the weld tooth 12 closer to the middle of the weld mark end surface 111 in the first direction X protrudes from the weld mark end surface 111 is smaller than the height at which the other weld tooth 12 protrudes from the weld mark end surface 111; that is, for both sides of the intermediate surface 110 in the first direction X of the weld mark end surface 111, for example, the weld tooth 12 on the first region 1111 and the weld tooth 12 on the second region 1112, of any two weld teeth 12, the height at which the weld tooth 12 closer to the intermediate surface 110 protrudes from the weld mark end surface 111 is smaller than the height at which the weld tooth 12 away from the intermediate surface 110 protrudes from the weld mark end surface 111. As a result, the remote surface 122 is gradually bent closer to the direction of the weld mark end surface 111 from the intermediate surface 110 to both ends of the welding head 11, so that when the weld mark end surface 111 presses the workpiece 30 to be welded and the welding head 11 vibrates and tilts, the welding teeth 12 are pushed out against the workpiece 30 to be welded due to the tilt of the welding head 11 together with the welding head 11, and the risk of cracks appearing at the front or rear of the weld mark area 31 can be better avoided or reduced.

[0089] In some embodiments, referring to Fig. 7, Fig. 7 is a structural schematic diagram of the welding head 11 part of the processing mechanism 10 in some embodiments of the present application. In the direction from the middle to both ends of the welding mark end surface 111 along the first direction X, the height of the welding teeth 12 protruding from the welding mark end surface 111 is gradually increased. In other words, from the intermediate surface 110 to both ends of the welding head 11, the height at which the weld teeth 12 protrude from the weld mark end surface 111 gradually increases; that is, in the direction from the middle to both ends in the first direction X of the weld mark end surface 111, of any two weld teeth 12, the height at which the weld tooth 12 closer to the middle of the weld mark end surface 111 in the first direction X protrudes from the weld mark end surface 111 is greater than the height at which the other weld tooth 12 protrudes from the weld mark end surface 111; that is, for both sides of the intermediate surface 110 in the first direction X of the weld mark end surface 111, for example, the weld tooth 12 on the first region 1111 and the weld tooth 12 on the second region 1112, of any two weld teeth 12, the height at which the weld tooth 12 closer to the intermediate surface 110 protrudes from the weld mark end surface 111 is greater than the height at which the weld tooth 12 away from the intermediate surface 110 protrudes from the weld mark end surface 111. As a result, the distance from the far-distance surface 122 to the weld mark end surface 111 gradually increases from the intermediate surface 110 to both ends of the welding head 11, and when the weld mark end surface 111 presses the workpiece 30 awaiting welding, the welding teeth 12 at the end can be pressed more into the workpiece 30 awaiting welding, increasing the pressing force of the weld mark area 31 against the workpiece 30 awaiting welding, stabilizing the workpiece 30 awaiting welding, and allowing the workpiece 30 awaiting welding to vibrate back and forth better.

[0090] For convenience of description, the following definitions are given. The point on the welding tooth 12 that is the furthest from the welding mark end surface 111 along the second direction Z is the far end point 123, that is, the far end point 123 on the welding tooth 12 is the point that is the largest distance from the welding mark end surface 111 along the second direction Z. The surface on which the multiple far end points 123 are located is the far end surface 124. The far end surface 124 can reflect the distance situation between the welding tooth 12 on the welding mark end surface 111 and the workpiece 30 to be welded.

[0091] In some embodiments, refer to Fig. 8, which is a structural schematic diagram of the welding head 11 portion of the processing mechanism 10 in some embodiments of the present application. The distal end surface 124 is a plane and perpendicular to the second direction Z. As a result, when the welding head 11 approaches the workpiece 30 to be welded, the multiple welding teeth 12 can contact and press the workpiece 30 to be welded almost simultaneously, and the deformation of the workpiece 30 to be welded is small, especially for the workpiece 30 to be welded that has a relatively high hardness, and the pressing force of the welding head 11 received by the workpiece 30 to be welded can be balanced.

[0092] 9 and 10, Fig. 9 is a structural schematic diagram of a welding head 11 portion of a processing mechanism 10 according to some embodiments of the present application. Fig. 10 is a structural schematic diagram of a welding head 11 portion of a processing mechanism 10 according to other some 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 means the radians of bending along the first direction X from the mid-surface 110 to the end of the first region 1111 and toward the middle of the longitudinal direction of the welding head 11. The bending width of the second region 1112 means the radians of bending along the first direction X from the mid-surface 110 to the end of the second region 1112 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, meaning that the radians of bending deformation of the first region 1111 are greater than the radians of bending deformation of the second region 1112 when the welding mark end surface 111 is in the direction from the mid-surface 110 to both ends along the first direction X. When the welding head 11 is likely to tilt toward 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 of both ends of the weld mark end face 111 along the first direction X on the workpiece 30 waiting to be welded can be reduced, the workpiece 30 waiting to be welded can be effectively protected, and the risk of cracks appearing at the front or rear of the weld mark region 31 can be avoided or reduced. In addition, for a workpiece 30 waiting to be welded that has an uneven thickness, the thicker side of the workpiece 30 waiting to be welded can be placed at the corresponding position of the first region 1111. In this way, the pressing force of the weld mark end face 111 on the workpiece 30 waiting to be welded can be balanced, and the welding of the workpiece 30 waiting to be welded can be more uniform and stronger.

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

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

[0096] In some embodiments, refer to Fig. 11, which is a structural schematic diagram of the welding head 11 part of the processing mechanism 10 in some embodiments of the present application. Any two welding teeth 12 on the welding mark end surface 111 are spaced apart to facilitate processing and manufacturing, which can reduce the number of welding teeth 12 installed on the welding mark end surface 111, and when the welding teeth 12 press the workpiece 30 to be welded, the extrusion deformation of the workpiece 30 to be welded can be reduced, and the workpiece 30 to be welded can be better protected.

[0097] For ease of description, the following definitions are provided: The end of the weld tooth 12 closest to the weld mark end surface 111 is the root 125. The root 125 on the weld tooth 12 is fixedly connected to the weld mark end surface 111 so as to fix the weld tooth 12 to the weld mark end surface 111.

[0098] In some embodiments, the connection point between the surface of the tooth base 125 and the weld mark end surface 111 presents a smooth curved surface, that is, the edge of the tooth base 125 and the weld mark end surface 111 are installed with a smooth transition, so that the surface of the tooth base 125 and the weld mark end surface 111 are connected with a smooth transition. In this way, the stress concentration at the contact point between the edge of the tooth base 125 and the weld mark end surface 111 can be reduced, and the structural strength of the connection between the weld tooth 12 and the weld mark end surface 111 can be ensured; and when the weld tooth 12 and the weld mark end surface 111 press against the workpiece 30 to be welded, the corner angle on the workpiece 30 to be welded can be reduced, and the structural strength of the workpiece 30 to be welded can be better ensured.

[0099] In some embodiments, referring to FIG. 11 , the area of ​​the weld mark end surface 111 between two adjacent weld teeth 12 is recessed into an arcuate surface 1113, and the arcuate surface 1113 contacts the edge of the tooth base 125, such a structure can better ensure that the edge of the tooth base 125 and the weld mark end surface 111 are installed with a smooth transition, reduce the stress concentration at the contact point between the edge of the tooth base 125 and the weld mark end surface 111, and ensure the structural strength of the connection between the weld tooth 12 and the weld mark end surface 111.

[0100] 12 , in some embodiments, both ends of the weld mark end surface 111 along the first direction X may transition to an adjacent side surface via a corner angle to reduce the volume of the weld head 11. As can be seen, one end of the weld mark end surface 111 along the first direction X may transition to an adjacent side surface via a corner angle, and the other end of the weld mark end surface 111 along the first direction X may transition to an adjacent side surface via a first fillet 112.

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

[0102] 13 to 16, Fig. 13 is a structural schematic diagram of the welding tooth 12 of the processing mechanism 10 of some embodiments of the present application. Fig. 14 is a structural schematic diagram of the welding tooth 12 of the processing mechanism 10 of some other embodiments of the present application. Fig. 15 is a structural schematic diagram of the welding tooth 12 of the processing mechanism 10 of still other embodiments of the present application. Fig. 16 is a structural schematic diagram of the welding tooth 12 of the processing mechanism 10 of further some embodiments of the present application.

[0103] In some embodiments, referring to FIG. 13, the welding tooth 12 has a part of a sphere. Referring also to FIG. 12, that is, the surface of the welding tooth 12 protruding from the weld mark end surface 111 has a spherical surface. The welding tooth 12 may have a hemispherical shape. 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 be larger than a hemisphere (i.e., the total volume of the welding tooth 12 is larger than the shape of a hemisphere). The welding tooth 12 uses a part of a sphere to reduce the contact stress on the workpiece 30 to be welded when pushing out the workpiece 30 to be welded, thereby reducing damage to the workpiece 30 to be welded.

[0104] 14, in some embodiments, the welding tooth 12 has a circular trapezoid shape. By providing the welding tooth 12 in a circular trapezoid shape, the welding tooth 12 can better press the workpiece 30 to be welded, reduce the contact stress of the peripheral side of the welding tooth 12 to the workpiece 30 to be welded, and ensure good structural strength of the welding tooth 12.

[0105] In some embodiments, referring to Figures 15 and 16, the welding tooth 12 has a tapered shape. In Figure 15, the welding tooth 12 has a quadrangular pyramid shape. In Figure 16, the welding tooth 12 has a triangular pyramid shape. That is, the cross section of the root 125 of the welding tooth 12 may have a polygonal shape such as a triangle, a rectangle, or a pentagon. By providing the welding tooth 12 with a tapered shape, the workpiece 30 to be welded can be better fixed.

[0106] In some embodiments, among the multiple welding teeth 12 on the weld mark end surface 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. As can be understood, 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. That is, the welding teeth 12 may be one or more of a spherical part, a trapezoid and a tapered part. When the shapes of the welding teeth 12 are various, the combination of the welding teeth 12 of various shapes can push out and fix the workpiece 30 to be welded to ensure the welding effect.

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

[0108] According to some embodiments of the present application, a processing mechanism 10 is provided, the processing mechanism 10 includes a welding head 11, one end of the welding head 11 has a welding mark end surface 111, and the welding mark end surface 111 is provided with a plurality of welding teeth 12. The welding mark end surface 111 is curved to present a circular arc surface, and the welding teeth 12 are distributed perpendicularly to the welding mark end surface 111, so that the deformation along the vibration direction of the welding head 11 can be counteracted due to the lack of rigidity of the welding head 11. The circular arc surface design of the welding mark end surface 111 can make the contact area between the welding head 11 and the workpiece to be welded 30 always remain the same or close in the working process, which avoids or reduces the risk of cracks appearing at the front or rear of the welding mark area 31, and reduces the risk of the workpiece to be welded 30 being pushed out and cut by the welding mark end surface 111.

[0109] Finally, it should be explained that the above embodiments are merely for illustrating the technical solution of the present application, and are not intended to limit it. Although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified or some or all of the technical features therein can be replaced with equivalents, and such modifications or replacements do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present application, and all should be included in the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, all of the technical features mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, and includes all technical solutions included within the scope of the claims. [Explanation of symbols]

[0110] Here, the symbols in the figure are: 100-Ultrasonic welding equipment, 10-machining mechanism, 11-welding head, 110-middle surface, 111-welding mark 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 point, 124-far surface, 125-tooth root, 13-support body, 21-welding base, 22-holder, 30-workpiece waiting for welding, 31-weld area, X - first direction, Z - second direction, Y - third direction.

Claims

1. A processing mechanism comprising: A welding head, wherein one end of the welding head along a second direction has a weld mark end surface, and a middle portion of the weld mark end surface along a first direction is installed to protrude in a direction away from the welding head so as to bend the weld mark end surface in an arch shape; A welding tooth, the plurality of welding teeth including: a welding tooth distributed on the end surface of the weld mark; The processing mechanism according to claim 1, wherein the first direction is parallel to a reciprocating movement direction in which the welding head vibrates back and forth during welding use, the second direction is a longitudinal direction of the welding head, and the second direction is perpendicular to the first direction.

2. The machining mechanism according to claim 1 , wherein a cross section of the end surface of the weld mark parallel to the first direction has an arc shape or a smooth curve shape.

3. A plane passing through a middle portion of the welding head along the first direction and perpendicular to the first direction is an intermediate surface, and opposing sides of the intermediate surface of the welding mark end surface are a first region and a second region, respectively; 2. The machining mechanism according to claim 1, wherein the first region and the second region are arranged symmetrically with respect to the intermediate plane, or a bending width of the first region is larger than a bending width of the second region.

4. 2. The machining mechanism according to claim 1, wherein a point on the welding tooth farthest from the welding mark end surface along a direction perpendicular to the welding mark end surface is a far-distance point, a surface on which a plurality of the far-distance points are located is a far-distance surface, and a middle part of the far-distance surface along the first direction is protruded and installed so as to bend the far-distance surface in an arch shape.

5. The machining mechanism according to claim 4 , wherein the far-distance surface is parallel to the end surface of the weld mark.

6. 6. The machining mechanism according to claim 5, wherein the heights at which the welding teeth protrude from the end surface of the weld mark are equal to each other.

7. The height of the weld tooth protruding from the weld mark end surface is gradually increased in the direction from the middle to both ends in the first direction of the weld mark end surface; Alternatively, the height at which the welding teeth protrude from the weld mark end surface is gradually reduced in a direction from the middle to both ends in the first direction of the weld mark end surface.

8. 2. The machining mechanism according to claim 1, wherein a point on the weld tooth that is farthest from the weld mark end surface along the second direction is a far end point, a surface on which the plurality of far end points are located is a far end surface, the far end surface is a plane, and the second direction is perpendicular to the far end surface.

9. The machining mechanism according to claim 1 , wherein any two adjacent welding teeth on the welding mark end surface are disposed at an interval.

10. The machining mechanism according to claim 9, characterized in that an end of the weld tooth close to the weld mark end surface is a tooth base, and a connection point between the surface of the tooth base and the weld mark end surface presents a smoothly curved surface.

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

12. The machining mechanism according to claim 1 , wherein the plurality of welding teeth are arranged in a matrix on the weld mark end surface.

13. 2. The processing mechanism according to claim 1, wherein a first fillet is provided on both end edges of the welding head along the first direction, and / or a second fillet is provided on both end edges of the welding head along a third direction, the third direction being perpendicular to the first direction, and the third direction being perpendicular to the second direction.

14. The machining mechanism of claim 1 , wherein the welding tooth exhibits one or more of a part of a sphere, a part of a trapezoid, and a tapered shape.

15. The processing mechanism of claim 1 , further comprising a support body, the welding head being attached to the support body.

16. 16. An ultrasonic welding device, comprising the processing mechanism according to claim 1.

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