Pressing plate fixture and welding device

Abstract

A pressing plate fixture and a welding device. The pressing plate fixture comprises pressing plate assemblies, and each pressing plate assembly comprises: a pressing plate in which through holes extending in a first direction are formed; a pressing head arranged on the pressing plate in a mode that the pressing head can move relative to the pressing plate in the first direction, wherein limiting holes extending in the first direction are formed in the pressing head, and the limiting holes are coaxial and communicated with the through holes; and a limiting member comprising a head and a rod portion, wherein the rod portion comprises a first rod portion and a second rod portion which are connected in the first direction, a thread is formed in the first rod portion, the thread of the first rod portion is firmly connected to a thread in the corresponding through hole, the second rod portion extends into the corresponding limiting hole, the second rod portion is in clearance fit with the inner surface of the limiting hole, and the size of the second rod portion extending into the limiting hole is less than the size of the limiting hole extending in the first direction.

Description

Press plate tooling and welding device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on the Chinese patent application with application number 202420290220.1, application date February 8, 2024, and invention name “Pressing plate tooling and welding device”, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into the present disclosure as a reference. Technical Field

[0003] The present disclosure relates to the field of battery manufacturing technology, and in particular to a pressing plate tool and a welding device. Background Art

[0004] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0005] During the battery manufacturing process, the adapter plate and the poles on the top cover need to be welded. During the welding process, a pressure plate fixture is usually required to press and tighten the adapter plate and the poles on the top cover so that the two fit tightly together to avoid relative movement that affects the quality of welding. In related technologies, during the repeated pressing process of the pressure head of the pressure plate fixture, the limiting piece connecting the pressure head and the pressure plate may become loose, which may cause the connection between the pressure head and the pressure plate to be misaligned, affecting the reliability of welding. Therefore, how to reduce the possibility of loosening of the limiting piece to improve welding quality is one of the research topics in the industry.

[0006] Utility Model Content

[0007] In order to solve the above technical problems, the present disclosure provides a pressing plate tool and a welding device.

[0008] The present disclosure is achieved through the following technical solutions.

[0009] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise: a first boss, wherein the bosses comprise a through-hole, wherein the bosses comprise a through-hole, and a second bosses comprise a through-hole. The bosses comprise a first boss, wherein the bosses comprise a through-hole, and a second bosses comprise a through-hole. The bosses comprise a first boss, wherein the bosses comprise a first boss ...

[0010] The limiting member can limit the pressure head and the pressure plate along the radial direction of the limiting member. Since the thread is only formed on the first rod portion of the limiting member, and the second rod portion extending into the limiting hole of the pressure head is clearance-fitted with the inner surface of the limiting hole. Therefore, when the pressure head presses the workpiece and floats along the first direction, it is the limiting hole of the pressure head that moves relative to the limiting member along the axial direction of the limiting member, thereby moving closer to or farther away from the pressure plate (also called "floating"), and the limiting member itself does not move relative to the pressure plate. In this way, the possibility of the limiting member loosening due to its own movement during the repeated floating of the pressure head can be effectively reduced, thereby reducing the possibility of the pressure head and the pressure plate being misaligned or even the pressure head floating failing, thereby improving the reliability of welding.

[0011] In some embodiments, the limiting hole includes a blind hole.

[0012] Therefore, when the pressure head presses the workpiece and floats along the first direction, the second rod portion of the limiting member extending into the limiting hole will not expose the pressure head through the limiting hole, so that the limiting member will not interfere with the pressed workpiece or other components outside the pressure head during welding, reducing the possibility of damage to the workpiece and external parts, ensuring the quality of welding, and reducing the possibility of the limiting member loosening due to the collision of components outside the pressure head with the limiting member.

[0013] In some embodiments, the pressure plate tooling also includes an elastic member, which is sleeved on the second rod portion and is used to apply elastic force to the pressure head; the through hole includes a first section and a second section, the first section is located on the side of the second section facing away from the pressure head along the first direction, and the aperture of the first section is smaller than the aperture of the second section; the thread in the through hole is formed on the inner wall of the first section, the elastic member is partially located in the second section, and one end of the elastic member abuts against the end face of the first section on the side facing away from the pressure plate along the first direction, and the other end of the elastic member abuts against the end face of the pressure head on the side close to the pressure plate along the first direction.

[0014] When the ram presses against the workpiece, the elastic element acts as a buffer, making the pressure applied by the ram more uniform, thereby protecting the workpiece and reducing the possibility of damage due to excessive pressure. Furthermore, when the size and shape of the workpiece to be welded changes, the ram can better adapt to the changes in the workpiece under the action of the elastic element, thereby pressing the workpiece stably and reliably.

[0015] In some embodiments, the pressure plate assembly includes at least one gasket, which is sleeved on the limiting member and located between the head and the pressure plate.

[0016] By providing a gasket, the contact area between the head and the pressure plate can be increased, thereby increasing the friction between the two, making the connection between the limiter and the pressure plate tighter, and further reducing the possibility of the limiter becoming loose.

[0017] In some embodiments, the two end faces of the gasket opposite to each other along the first direction are respectively formed with a first serration and a second serration, and when there are multiple gaskets, the first serration and the second serration on the opposite sides of adjacent gaskets can engage with each other.

[0018] Because the first and second serrations are formed on the opposing end surfaces of the gasket, the serrations deform when subjected to force, thereby increasing the friction between the gasket, the head, and the pressure plate, further enhancing the gasket's locking force and thus further improving the anti-loosening effect. Furthermore, because the first and second serrations can mesh with each other, when multiple gaskets are provided, each gasket can mesh with each other via the serrations, forming a secure joint configuration, further reducing the possibility of the stopper loosening.

[0019] In some embodiments, the first serration portion includes a plurality of first oblique teeth distributed circumferentially around the axis of the gasket, and the second serration portion includes a plurality of second oblique teeth distributed circumferentially around the axis of the gasket, and the inclination directions of the first oblique teeth and the second oblique teeth are opposite.

[0020] Since the first serrated portion includes first bevel teeth and the second serrated portion includes second bevel teeth, when the limit member is tightened to the through hole, the first bevel teeth and the second bevel teeth can reduce the possibility of the limit member and the pressure plate rotating in the opposite direction relative to the gasket, thereby improving the anti-loosening effect.

[0021] In some embodiments, the first oblique teeth are evenly distributed along the entire circumference of the gasket; and / or the second oblique teeth are evenly distributed along the entire circumference of the gasket.

[0022] In this way, the uniformity of the anti-loosening effect can be improved, and the possibility of the limiter becoming loose can be further reduced.

[0023] In some embodiments, a countersunk hole is formed on the surface of the through hole facing away from the pressure head, the head of the limiting member is located in the countersunk hole, and the gasket is located between the head and the bottom end surface of the countersunk hole.

[0024] As a result, the head of the limiter and the gasket will not be exposed on the outer surface of the pressure plate facing away from the pressure head, thereby ensuring the flatness of the outer surface of the pressure plate and reducing the possibility of interference with other components arranged thereon, thereby causing the pressure head to float and fail.

[0025] In some embodiments, the pressure head includes a hook portion extending along the second direction, the pressure plate includes a slot extending along the second direction, the slot is used for the hook portion to be inserted, and the pressure head is arranged on the pressure plate through the cooperation between the hook portion and the slot; wherein, when the hook portion is inserted into the slot, the hook portion can reciprocate in the slot along the first direction, and the second direction is perpendicular to the first direction.

[0026] Therefore, through the cooperation of the hook portion and the slot, the pressure head and the pressure plate can be limited along the first direction in a simple manner without affecting the floating of the pressure head along the first direction, thereby reducing the possibility of the pressure head falling from the pressure plate.

[0027] In some embodiments, the elastic member comprises a spring.

[0028] The spring has a simple structure, is easy to install, and can mitigate impact and absorb vibration. In this way, the pressure plate tooling can achieve elastic buffering of the workpiece with a simple structure, thereby protecting the workpiece, increasing the reliability of the pressure plate tooling, and reducing the production cost of the pressure plate tooling.

[0029] In some embodiments, the number of the pressure plate assemblies is two; the pressure plates of the two pressure plate assemblies are connected to each other; or the pressure plates of the two pressure plate assemblies are formed into an integrated structure.

[0030] Thus, the pressing plate tooling can press two groups of workpieces at the same time, thereby improving production efficiency. In addition, the two pressing plate assemblies are connected to each other or formed into an integrated structure, which can make the structure of the pressing plate tooling more compact and more convenient for assembly.

[0031] In some embodiments, the pressing plate tooling further includes an identification code; a groove is formed on the surface of the pressing plate facing away from the pressing head, and the identification code is disposed in the groove.

[0032] The platen fixture is equipped with an identification code. This code can be scanned by a scanner to trace the welding process of the workpiece. It can also trace the usage status of the platen fixture, allowing for timely replacement of the platen fixture to ensure welding quality. Furthermore, the provision of a groove ensures that the position of the identification code on the platen remains consistent each time, allowing the scanner to accurately scan the identification code.

[0033] The second aspect of the present disclosure provides a welding device, which includes a pressure plate fixture provided according to the first aspect of the present disclosure, wherein the pressure plate fixture can reciprocate along a first direction; a positioning fixture for positioning the workpiece to be welded, and the positioning fixture is located on the opposite side of the pressure plate fixture along the first direction; and a welding fixture for welding the workpiece pressed by the pressure head of the pressure plate fixture.

[0034] Since the welding device includes a pressing plate fixture, the workpiece to be welded can be pressed by the pressing plate fixture before welding, thereby reducing the occurrence of adverse conditions such as welding defocusing and cold welding caused by accidental movement of the workpiece during the welding process, improving the quality of welding and ensuring the reliability of the welding device.

[0035] Utility model effect

[0036] The present disclosure provides a pressing plate tool and a welding device with good anti-loosening effect and high welding reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0038] FIG1 is a schematic diagram of the three-dimensional structure of a pressing plate tool provided in some embodiments of the present disclosure;

[0039] FIG2 is a schematic diagram of a planar structure of a pressing plate tooling provided in some embodiments of the present disclosure;

[0040] FIG3 is a schematic diagram of a three-dimensional exploded structure of a pressing plate tooling provided in some embodiments of the present disclosure;

[0041] FIG4 is a partial planar cross-sectional view of a pressing plate tool provided in some embodiments of the present disclosure;

[0042] FIG5 is a schematic diagram of the three-dimensional structure of the limiting member and the gasket provided in some embodiments of the present disclosure.

[0043] Description of Reference Numerals

[0044] 1-pressing plate; 11-through hole; 11a-thread (of the through hole); 111-first section; 112-second section; 113-counterbore; 12-first through hole; 13-slot; 131-first rib; 132-extension groove; 14-groove; 2-pressing head; 21-limiting hole; 22-second through hole; 23-hook; 231-second rib; 3-limiting member; 31-head; 32-rod; 321-first rod; 322-second rod; 321a-thread (of the first rod); 4-elastic member; 5-gasket; 51-first serrated portion; 52-second serrated portion; 6-identification code; 10-pressing plate assembly; 100-pressing plate tooling. DETAILED DESCRIPTION

[0045] The following embodiments of the technical solution of the present disclosure are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present disclosure and are therefore only examples and are not intended to limit the scope of protection of the present disclosure.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this disclosure; the terms "including" and "having" and any variations thereof in this disclosure are intended to cover non-exclusive inclusions.

[0047] In the description of the embodiments of the present disclosure, technical terms such as "first" and "second" are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0048] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] In the description of the embodiments of the present disclosure, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0050] In the description of the embodiments of the present disclosure, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present disclosure.

[0051] In the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0052] In the description of the embodiments of the present disclosure, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0053] Hereinafter, the present disclosure will be described in detail.

[0054] Currently, new energy batteries are increasingly being used in everyday life and industry. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in a variety of fields such as aerospace. As the application of power batteries continues to expand, market demand is also growing.

[0055] In the battery manufacturing process, welding has always been one of the more important processes in the product production process. There are many workpieces that need to be welded, such as welding the tab to the adapter, welding the adapter to the terminal post of the top cover, welding the terminal post to the busbar, etc. During the welding process, it is usually necessary to use a pressure plate tool to press and compact the workpiece to be welded to reduce the possibility of unwelded or cold welds caused by relative movement of the workpiece relative to the welding device or relative movement of the workpieces with each other, thereby affecting the welding quality.

[0056] In the related art, the limiter usually connects the pressure plate and the pressure head in a threaded connection. During the process of repeatedly pressing the workpiece with the pressure head of the pressure plate fixture, the limiter may be loosened due to the force. At the same time, the mechanical vibration during the welding process may also cause the limiter to loosen. After the limiter becomes loose, it may extend too far beyond the outer surface of the pressure plate and interfere with other components provided on the pressure plate, which may cause the connection between the pressure head and the pressure plate to be misaligned or the pressure head to float and fail. At this time, if the pressure head continues to press the workpiece, it may cause the workpiece to be deformed by pressing, or cause the workpiece to be pressed too tightly, etc., which may cause the defocus focus to shift during welding or insufficient welding energy, resulting in poor welding or cold welding, seriously affecting the welding quality.

[0057] In response to the problems existing in the above-mentioned related technologies, the present disclosure proposes a pressure plate fixture. The pressure plate fixture includes at least one pressure plate assembly, and the pressure plate assembly includes a pressure plate, a pressure head and a limiter. The pressure plate is provided with a through hole extending along a first direction. The pressure head is arranged on the pressure plate in a manner that it can move relative to the pressure plate along the first direction, and the pressure head is provided with a limiter hole extending along the first direction, and the limiter hole is coaxial with and connected to the through hole. The limiter includes a head and a rod portion, and the rod portion includes a first rod portion and a second rod portion connected along the first direction, a thread is formed on the first rod portion, and the thread of the first rod portion is fastened to the thread in the through hole, and the second rod portion extends into the limiter hole, and the second rod portion is clearance-matched with the inner surface of the limiter hole. Wherein, the dimension of the second rod portion extending into the limiter hole is smaller than the dimension of the limiter hole extending along the first direction.

[0058] The threads on the limiting member of the pressure plate fixture of the disclosed embodiment are formed only on the first rod portion of the limiting member and are only threadedly engaged with the pressure plate of the pressure plate fixture. The second rod portion of the limiting member, which extends into the limiting hole of the pressure head, is clearance-fitted with the inner surface of the limiting hole. Therefore, when the pressure head presses the workpiece and floats along the first direction, it is the limiting hole of the pressure head that moves relative to the limiting member, while the limiting member itself does not move. In this way, the possibility of the limiting member loosening due to its own movement during the repeated floating of the pressure head can be effectively reduced, thereby reducing the possibility of misalignment between the pressure head and the pressure plate and the failure of the pressure head floating, thereby improving the reliability of welding.

[0059] The pressing plate fixture of the embodiment of the present disclosure can be used in the production process of batteries, for example, to press and compact the battery adapter and the terminal post of the top cover during welding. Of course, those skilled in the art will understand that the pressing plate fixture provided by the embodiment of the present disclosure is not only used to press various workpieces to be welded in the battery production process, but can also be used to press other workpieces that need to be pressed and compacted in other production lines.

[0060] In the embodiment of the present disclosure, the battery may be a battery cell.

[0061] A battery cell refers to a basic unit that can realize the mutual conversion of chemical energy and electrical energy. It can be used to make battery modules or battery packs, which are used to power electrical devices.

[0062] The battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0063] The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present disclosure.

[0064] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, placed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0065] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This disclosure does not specifically limit the type of electrolyte, and the electrolyte may be selected based on needs. The electrolyte may be liquid, gel, or solid.

[0066] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0067] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present disclosure.

[0068] In some embodiments, the housing includes an end cap and a shell. The shell has an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly, electrolyte, and other substances. The shell may have one or more openings. One or more end caps may also be provided.

[0069] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via an adapter. The electrode terminal may be provided on the end cap or on the housing.

[0070] In some embodiments, the housing is provided with a pressure relief mechanism for releasing the internal pressure of the battery cell.

[0071] In the embodiments of the present disclosure, the battery may also be a single physical module including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid via a busbar.

[0072] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to FIG. 1 to FIG. 5 .

[0073] Figure 1 is a schematic diagram of the three-dimensional structure of the pressure plate tooling provided in some embodiments of the present disclosure. Figure 2 is a schematic diagram of the planar structure of the pressure plate tooling provided in some embodiments of the present disclosure. Figure 3 is a schematic diagram of the three-dimensional exploded structure of the pressure plate tooling provided in some embodiments of the present disclosure. Figure 4 is a partial planar cross-sectional view of the pressure plate tooling provided in some embodiments of the present disclosure. Figure 5 is a schematic diagram of the three-dimensional structure of the limiter and gasket provided in some embodiments of the present disclosure.

[0074] In some embodiments of the present disclosure, for ease of description, a first direction, a second direction, and a third direction are defined, and the first direction, the second direction, and the third direction are perpendicular to each other. However, those skilled in the art should understand that the embodiments of the present disclosure are not limited to the case where the three directions are perpendicular to each other. For ease of description, as shown by the arrows in Figures 1 to 4, the direction of arrow X is the first direction, the direction of arrow Y is the second direction, and the direction of arrow Z is the third direction.

[0075] As shown in Figures 1 to 3, the first aspect of the present disclosure provides a pressure plate fixture 100, which includes at least one pressure plate assembly 10. The pressure plate assembly 10 includes a pressure plate 1, a pressure head 2 and a limiter 3. The pressure plate 1 is provided with a through hole 11 extending along a first direction. The pressure head 2 is arranged on the pressure plate 1 in a manner that it can move relative to the pressure plate 1 along the first direction, and the pressure head 2 is provided with a limiter hole 21 extending along the first direction, and the limiter hole 21 is coaxial with and connected to the through hole 11. The limiter 3 includes a head 31 and a rod 32, and the rod 32 includes a first rod 321 and a second rod 322 connected along the first direction. A thread 321a is formed on the first rod 321, and the thread 321a of the first rod 321 is fastened to the thread 11a in the through hole 11. The second rod 322 extends into the limiter hole 21, and the second rod 322 is clearance-matched with the inner surface of the limiter hole 21. The dimension of the second rod portion 322 extending into the limiting hole 21 is smaller than the dimension of the limiting hole 21 extending along the first direction.

[0076] The pressing plate fixture 100 is used to press and tighten the workpiece to be welded during welding operations, so as to reduce the possibility that the workpiece to be welded moves relative to the welding device, thereby affecting the welding quality.

[0077] The pressing plate assembly 10 is a component that realizes the pressing function of the pressing plate tool 100. The number of the pressing plate assembly 10 can be one or more, and can be specifically set according to actual use. The embodiment of the present disclosure does not specifically limit its number.

[0078] In the disclosed embodiment, the pressing plate 1 is used to support the pressing head 2. The pressing plate 1 can, for example, be fixedly connected to the frame of the welding device and be generally flat or block-shaped. In other embodiments, the pressing plate 1 can also be connected to any other suitable location or have any other suitable shape. As long as it can stably support the pressing head 2, the disclosed embodiment does not impose specific restrictions on the location and shape of the pressing plate 1.

[0079] Specifically, the pressure head 2 has a pressing surface, which is a plane and is used to contact the workpiece when pressing the workpiece. The pressure head 2 is arranged on the pressure plate 1 in a manner that can move along the first direction, so that the pressure head 2 can float along the first direction relative to the pressure plate 1. In this way, the floating pressure head 2 can automatically adjust its position under the action of pressure, so that the pressure distribution of pressing the workpiece is more uniform, reducing the risk of deformation or damage of the workpiece. In addition, the floating pressure head 2 can also adapt to workpieces of different shapes and sizes, and has strong versatility. When pressing different workpieces, there is no need to frequently adjust the position of the pressure head 2, which can effectively improve production efficiency.

[0080] For example, the pressing plate assembly 10 may be driven by a driving device to move toward the workpiece until the pressing surface of the pressing head 2 contacts the workpiece and applies a preset pressure to the workpiece, thereby completing the pressing operation.

[0081] As another example, the structure carrying the workpiece can be driven by a driving device to move toward the pressing plate assembly 10 until the pressing surface of the pressing head 2 contacts the workpiece and applies a preset pressure to the workpiece to complete the pressing operation.

[0082] The driving device includes but is not limited to a motor.

[0083] The embodiment of the present disclosure does not specifically limit the connection method between the pressure head 2 and the pressure plate 1, as long as the pressure head 2 can float relative to the pressure plate 1 along the first direction.

[0084] As shown in Figure 3, the pressure plate 1 is formed with a first through-hole 12 extending in a first direction, and the pressure head 2 is formed with a second through-hole 22 extending in the first direction. The first through-hole 12 and the second through-hole 22 are coaxial and connected, and together define a welding channel for performing welding operations. When the pressure plate assembly 10 presses and tightens the workpiece, the welding fixture of the welding device can perform the corresponding welding operation on the workpiece through the welding channel.

[0085] In the embodiment disclosed herein, the shape of the welding channel is generally truncated cone-shaped, that is, the equivalent diameter of the limiting channel gradually decreases along the first direction, wherein the opening at the end with the largest equivalent diameter is formed on the first through hole 12 and faces the welding fixture of the welding device, and the opening at the end with the smallest equivalent diameter is formed on the second through hole 22 and faces the part to be welded of the workpiece. Taking the welding fixture as a laser welding fixture as an example, the opening at the end with the largest equivalent diameter faces the laser welding fixture, thereby facilitating the laser beam to more accurately enter and focus on the welding channel, and the opening at the end with the smallest equivalent diameter faces the part to be welded of the workpiece, thereby facilitating the energy of the laser beam entering the welding channel to be better focused on the part to be welded of the workpiece, thereby reducing the possibility of poor welding due to insufficient welding energy.

[0086] In some other embodiments, the shape of the welding channel may also be conical, cylindrical, or a combination of cylindrical and truncated cone shapes, or any other suitable shape.

[0087] The pressure plate assembly 10 further includes a stopper 3, which connects the pressure plate 1 and the pressing head 2 and is used to limit the pressure plate 1 and the pressing head 2 along the radial direction of the stopper 3. This can reduce the possibility of the pressing head 2 shaking relative to the pressure plate 1, thereby improving the stability and reliability of the pressure plate fixture 100 when pressing the workpiece.

[0088] There are multiple limiters 3, which are evenly and spaced apart on the pressure plate assembly 10, so that the limit between the pressure plate 1 and the pressure head 2 is more stable. The embodiment of the present disclosure does not specifically limit the number of limiters 3, and can be specifically set according to the actual size of the pressure plate assembly 10. For example, it can be 4, 8, or other suitable numbers, and can be arranged around the first through hole 12.

[0089] In the disclosed embodiment, as shown in Figures 3 and 4 , the pressing plate 1 further comprises a through hole 11 extending along a first direction through the pressing plate 1, and a thread 11a is formed on the inner surface of the through hole 11. The pressing head 2 further comprises a limiting hole 21 extending along the first direction. The limiting hole 21 is coaxial with and communicates with the through hole 11. The limiting member 3 sequentially passes through the through hole 11 and the limiting hole 21, thereby limiting the position between the pressing head 2 and the pressing plate 1.

[0090] As shown in Figures 4 and 5, the position-limiting member 3 of the present embodiment includes a head 31 and a rod 32. The rod 32 includes a first rod 321 and a second rod 322 connected to each other along a first direction. The first rod 321 is disposed adjacent to the head 31 along the first direction, while the second rod 322 is disposed away from the head 31 along the first direction. The position-limiting member 3 of the present embodiment has threads 321a formed only on the first rod 321. The threads 321a are fastened to the threads 11a within the through-hole 11 of the pressure plate 1 through a threaded engagement. The second rod 322 extends into the position-limiting hole 21 of the pressure head 2 and has a clearance fit with the inner surface of the position-limiting hole 21. Since the second rod 322 extends into the position-limiting hole 21, the position-limiting hole 21 can only move along the first direction. This allows the pressure head 2 to float along the first direction, thereby limiting the position of the pressure head 2 and reducing the possibility of the pressure head 2 being misaligned, failing to tighten the welded portion of the workpiece, or causing damage to the workpiece.

[0091] Furthermore, because the second rod portion 322 of the stopper 3 is clearance-fitted with the stopper hole 21 and does not contact the inner surface of the stopper hole 21, when the ram 2 presses the workpiece and floats in the first direction, it is the stopper hole 21 of the ram 2 that moves relative to the second rod portion 322 of the stopper 3, while the stopper 3 itself does not move. This effectively reduces the possibility of the stopper 3 loosening due to its own movement during the repeated floating of the ram 2, thereby reducing the possibility of misalignment between the ram 2 and the pressure plate 1 and the possibility of the ram 2 failing to float, thereby improving welding reliability.

[0092] The embodiment of the present disclosure does not specifically limit the shape of the second rod portion 322. The second rod portion 322 can be smooth, or have a textured or rough surface, or any other suitable shape, as long as the clearance between the second rod portion 322 and the inner surface of the limiting hole 21 is matched.

[0093] The limiting hole 21 of the pressure head 2 can be a through hole that passes through the pressure head 2 along the first direction, or it can be a blind hole, as long as it can be ensured that the size of the second rod portion 322 extending into the limiting hole 21 is smaller than the size of the limiting hole 21 extending along the first direction. In this way, the pressure head 2 can float smoothly along the first direction.

[0094] In some embodiments of the present disclosure, as shown in FIG. 4 , the limiting hole 21 includes a blind hole.

[0095] Therefore, when the ram 2 presses the workpiece and floats along the first direction, the second rod portion 322 of the limiting member 3 extending into the limiting hole 21 will not be exposed to the ram 2 through the limiting hole 21, so that the limiting member 3 will not interfere with the pressed workpiece or other components outside the ram 2 during welding, reducing the possibility of damage to the workpiece or other components, ensuring the quality of welding, and reducing the possibility of the limiting member 3 loosening due to the collision of components outside the ram 2 with the limiting member 3.

[0096] Of course, those skilled in the art should understand that in some other embodiments, the limiting hole 21 may also be a through hole, as long as the second rod portion 322 of the limiting member 3 does not exceed the limiting hole 21 during the floating of the pressure head 2 along the first direction.

[0097] In some embodiments of the present disclosure, as shown in Figures 3 and 4 , the pressing plate fixture 100 further includes an elastic member 4, which is sleeved on the second rod portion 322 and is used to apply an elastic force to the pressing head 2. The through hole 11 includes a first section 111 and a second section 112. The first section 111 is located on the side of the second section 112 facing away from the pressing head 2 along the first direction, and the aperture of the first section 111 is smaller than the aperture of the second section 112. Threads 11a within the through hole 11 are formed on the inner wall of the first section 111. The elastic member 4 is partially located within the second section 112, with one end of the elastic member 4 abutting the bottom end surface of the first section 111 (the end surface facing away from the pressing plate 1 along the first direction), and the other end of the elastic member 4 abutting the top end surface of the pressing head 2 (the end surface facing toward the pressing plate 1 along the first direction).

[0098] Specifically, the aperture of the second rod portion 322 is larger than the aperture of the first section 111 and the aperture of the limiting hole 21, so that the elastic member 4 will not enter the first section 111 of the through hole 11 and the limiting hole 21, so that the elastic member 4 can be stably clamped between the bottom end surface of the first section 111 and the top end surface of the pressure head 2.

[0099] Illustratively, the bottom end surface of the first section 111 may be provided with a groove, and one end of the elastic member 4 along the first direction may be accommodated in the groove, so that the elastic member 4 can be better positioned and the installation of the elastic member 4 is facilitated.

[0100] Because of the provision of the elastic member 4, when the ram 2 presses the workpiece and floats in the first direction toward the pressure plate 1, the elastic member 4 is compressed and applies an elastic force to the ram 2 away from the pressure plate 1, thereby acting as a certain elastic buffer, making the pressing force applied by the ram 2 on the workpiece more uniform, thereby protecting the workpiece and reducing the possibility of damage to the workpiece due to excessive pressure. In addition, when the size and shape of the workpiece to be welded changes, the ram 2 can better adapt to the changes in the workpiece under the action of the elastic member, thereby pressing the workpiece stably and reliably.

[0101] In addition, due to the provision of the elastic member 4, when the pressure plate fixture 100 finishes pressing the workpiece and moves away from the workpiece, the pressure head 2 can gradually move away from the pressure plate 1 in the first direction and return to its initial position under the buffering action of the elastic member 4, thereby reducing the possibility of damage to the pressure plate 1 and the pressure head 2 due to sudden collision.

[0102] The elastic member 4 includes but is not limited to a compression spring.

[0103] In some embodiments of the present disclosure, as shown in FIG. 5 , the pressing plate assembly 10 includes at least one gasket 5 , which is sleeved on the limiting member 3 and located between the head 31 and the pressing plate 1 .

[0104] In the embodiment of the present disclosure, the gasket 5 is generally annular. In some other embodiments, the gasket 5 may also be in any other suitable shape.

[0105] Although only providing the thread 321a on the first rod portion 321 of the limiting member 3 can reduce the loosening of the limiting member 3 due to its own movement, it cannot completely reduce the loosening of the limiting member 3 caused by mechanical vibration and the like.

[0106] Therefore, the pressure plate assembly 10 also includes a gasket 5. By setting the gasket 5, the contact area between the head 31 and the pressure plate 1 can be increased, thereby increasing the friction between the two, improving the stability of the connection relationship between the limiter 3 and the through hole 11, and thus making the connection between the limiter 3 and the pressure plate 1 tighter, further reducing the possibility of the limiter 3 loosening.

[0107] In some embodiments of the present disclosure, the two end faces of the gasket 5 opposite to each other along the first direction are respectively formed with a first serration 51 and a second serration 52, and when there are multiple gaskets 5, the first serration 51 and the second serration 52 on the opposite surfaces of adjacent gaskets 5 can engage with each other.

[0108] Those skilled in the art should understand that in some other embodiments, the gasket 5 may have a serration portion formed on only one end surface, that is, the gasket 5 may have only a first serration portion 51 or only a second serration portion 52 .

[0109] The tooth shapes of the first serration 51 and the second serration 52 include but are not limited to straight teeth, helical teeth, etc., and the embodiment of the present disclosure does not specifically limit their tooth shapes. In addition, the tooth shapes of the first serration 51 and the second serration 52 can be the same or different.

[0110] Since the gasket 5 is formed with a first serrated portion 51 and a second serrated portion 52, when the limiter 3 is tightened on the pressure plate 1, the serrated portion will be deformed under the force, thereby increasing the friction between the gasket 5 and the head 31 of the limiter 3 and the pressure plate 1, further improving the locking force of the gasket 5, and further improving the anti-loosening effect.

[0111] In addition, since the first serrations 51 and the second serrations 52 can engage with each other, when multiple gaskets 5 are provided, each gasket 5 can engage with each other through the serrations to form a stable combination structure, thereby further reducing the possibility of the limiter 3 loosening.

[0112] In the embodiment of the present disclosure, there are two gaskets 5. When the limit member 3 tends to loosen due to mechanical vibration, the first serrated portion 51 and the second serrated portion 52 of the two gaskets 5 meshing with each other will produce staggered interference of the tooth surfaces, thereby increasing resistance and reducing the possibility of loosening of the head 31 of the limit member 3.

[0113] Of course, those skilled in the art should understand that the embodiment of the present disclosure does not specifically limit the number of gaskets 5 , and only one gasket 5 or more (more than two) gaskets 5 may be provided.

[0114] In some embodiments of the present disclosure, the first serration portion 51 includes a plurality of first oblique teeth distributed circumferentially around the axis of the gasket 5, and the second serration portion 52 includes a plurality of second oblique teeth distributed circumferentially around the axis of the gasket, and the inclination directions of the first oblique teeth and the second oblique teeth are opposite.

[0115] Since the first serrated portion 51 includes first bevel teeth and the second serrated portion 52 includes second bevel teeth, when the limit member 3 is tightened to the through hole 11, the first bevel teeth and the second bevel teeth can respectively abut against the bottom end surface of the head 31 of the limit member 3 along the first direction and the top end surface of the pressure plate 1 along the first direction, thereby reducing the possibility of the limit member 3 and the pressure plate 1 rotating in the opposite direction relative to the gasket 5, thereby improving the anti-loosening effect.

[0116] In some embodiments of the present disclosure, the first oblique teeth are evenly distributed along the entire circumference of the gasket 5 , and / or the second oblique teeth are evenly distributed along the entire circumference of the gasket 5 .

[0117] As a result, the uniformity of the anti-loosening effect of the gasket 5 can be improved, and the possibility of the stopper 3 becoming loose can be further reduced.

[0118] Those skilled in the art will appreciate that the first and second bevel teeth may also be discretely distributed along the entire circumference of the gasket 5, i.e., a plurality of first bevel teeth may be formed at intervals, and / or a plurality of second bevel teeth may be formed at intervals. The presently disclosed embodiment does not impose any specific limitation on the distribution of the first and second bevel teeth, as long as the first and second bevel teeth of the two gaskets 5 can mesh with each other and meet the anti-loosening requirements.

[0119] In some embodiments of the present disclosure, as shown in Figure 4, a countersunk hole 113 is formed on the surface of the through hole 11 facing away from the pressure head 2, the head 31 of the limiter 3 is located in the countersunk hole 113, and the gasket 5 is located between the head 31 and the bottom end surface of the countersunk hole 113.

[0120] Thus, when the stopper 3 connects the pressure plate 1 and the pressure head 2, the head 31 of the stopper 3 and the gasket 5 will not be exposed on the outer surface of the pressure plate 1 on the side facing away from the pressure head 2, thereby making the outer surface of the pressure plate 1 facing away from the pressure head 2 smoother, making it easier to assemble other components on this outer surface. In addition, the possibility of interference between the head 31 and other components arranged on the outer surface of the pressure plate 1 can be reduced, thereby reducing the possibility of the pressure head 2 and the pressure plate 1 being misaligned, resulting in the floating failure of the pressure head 2.

[0121] The embodiment of the present disclosure does not impose any specific limitation on the size of the countersunk hole 113 along the first direction, as long as the top surface of the head 31 along the first direction is not exposed on the outer surface of the pressure plate 1 facing away from the pressure head 2. The size of the countersunk hole 113 can be specifically set according to the specific size of the head 31 of the limit member 3.

[0122] In some embodiments of the present disclosure, as shown in Figures 3 and 4, the press head 2 includes a hook portion 23 extending along the second direction, and the pressure plate 1 includes a slot 13 extending along the second direction. The slot 13 is used to receive the hook portion 23, and the press head 2 is disposed on the pressure plate 1 through the engagement of the hook portion 23 with the slot 13. When the hook portion 23 is inserted into the slot 13, the hook portion 23 can reciprocate within the slot 13 along the first direction, and the second direction is perpendicular to the first direction.

[0123] Specifically, as shown in Figure 4, the end of the slot 13 protrudes along the third direction to form a first rib 131, and the end of the hook portion 23 protrudes along the third direction to form a second rib 231. The first rib 131 and the second rib 231 extend in opposite directions along the third direction. When the hook portion 23 is inserted into the slot 13, the second rib 231 engages with the first rib 131, thereby limiting the position of the pressing head 2 in the first direction and reducing the possibility of the pressing head 2 falling off the pressure plate 1. The third direction is perpendicular to both the first and second directions.

[0124] In addition, the second rib 231 can reciprocate along the first direction in the slot 13. When the ram 2 is in the initial state, that is, when it is not pressing the workpiece, there is a spacing distance between the top surface of the slot 13 along the first direction and the second rib 231. The spacing distance is the distance that the ram 2 can float along the first direction relative to the pressure plate 1.

[0125] Therefore, through the cooperation between the hook portion 23 and the slot 13, the limiting of the pressure head 2 and the pressure plate 1 along the first direction can be achieved in a simple manner without affecting the floating of the pressure head 2 along the first direction, thereby improving the connection reliability of the pressure head 2 and the pressure plate 1.

[0126] As shown in Figures 1 and 2, the corners of the hook portion 23 are generally right-angled, and the corners of the slot 13 are provided with extension grooves 132 with a generally circular cross-section. In this way, when the pressure head 2 floats along the first direction, the corners of the hook portion 23 are not easy to cause damage to the slot of the pressure plate 1, thereby extending the service life of the pressure plate tooling 100.

[0127] In some embodiments of the present disclosure, the elastic member 4 includes a spring.

[0128] The spring has a simple structure, is easy to install, and can mitigate impact and absorb vibration. In this way, the pressure plate fixture 100 can achieve elastic buffering of the workpiece with a simple structure, thereby protecting the workpiece, increasing the reliability of the pressure plate fixture 100, and reducing the production cost of the pressure plate fixture 100.

[0129] Of course, in some other embodiments, the elastic member may also be a spring or any other suitable structure.

[0130] In some embodiments of the present disclosure, as shown in Figure 1 , there are two pressing plate assemblies 10. The pressing plates 1 of the two pressing plate assemblies 10 are connected to each other, or the pressing plates 1 of the two pressing plate assemblies 10 are formed into an integrated structure.

[0131] Therefore, the pressing plate fixture 100 can press two groups of workpieces at the same time, thereby improving production efficiency.

[0132] Of course, those skilled in the art should understand that in some other embodiments, the number of pressure plate assemblies 10 may be only one or more (more than two), and can be specifically set according to actual conditions and processing difficulty.

[0133] In the disclosed embodiment, the pressure plate 1 of the pressure plate assembly 10 is formed as an integrated structure, which can reduce the number of parts and ease the assembly difficulty. Of course, in some other embodiments, the pressure plate assembly 10 can also be assembled as separate split structures. In this way, the appropriate number of pressure plate assemblies 10 can be selected for assembly according to actual use requirements, which provides greater flexibility.

[0134] The interconnected or integrated structure of the pressure plate assemblies 10 can make the structure of the pressure plate tooling 100 more compact and easier to assemble.

[0135] In some embodiments of the present disclosure, the pressing plates 1 of the two pressing plate assemblies 10 are connected to each other, and the pressing heads 2 of the two pressing plate assemblies 10 are spaced apart along a second direction, which is perpendicular to the first direction.

[0136] Therefore, when the pressure plate tooling 100 needs to be replaced, the clamping jaws of the replacement device can extend into the gap area between the two pressure heads 2 and clamp the interconnected pressure plates 1 in the gap area, thereby making it easier for the clamping jaws to clamp the pressure plate tooling 100.

[0137] In some embodiments of the present disclosure, as shown in FIG1 , the pressing plate tool 100 further includes an identification code 6 . A groove 14 is formed on the surface of the pressing plate 1 facing away from the pressing head 2 , and the identification code 6 is disposed in the groove 14 .

[0138] The identification code 6 may be, for example, a QR code, a bar code, a radio frequency identification code, or other identification code. The identification code 6 is used to store information related to the pressing tool 100 .

[0139] The pressure plate fixture 100 is provided with an identification code 6. Thus, the identification code 6 can be scanned by a scanning device to trace the welding process of the workpiece, and the use status of the pressure plate fixture 100 can also be traced so that the pressure plate fixture 100 can be replaced in time to ensure the welding quality.

[0140] In addition, the pressing plate 1 is formed with a groove 14, into which the identification code 6 can be bonded, for example, by adhesive bonding. The provision of the groove 14 ensures that the position of the identification code 6 on the pressing plate 1 remains consistent each time, thereby enabling the scanning device to accurately scan the identification code 6. Furthermore, compared to conventional code engraving processes, bonding the identification code 6 to the groove 14 facilitates replacement of the identification code 6 when it becomes worn or damaged.

[0141] The groove 14 is generally rectangular, and semicircular shapes extend outward at the four corners, so that when the identification code 6 needs to be replaced, it is convenient to remove the identification code 6 in the groove 14. The second aspect of the embodiment of the present disclosure provides a welding device, which includes a pressure plate fixture 100, a positioning fixture and a welding fixture provided according to the first aspect of the present disclosure. The pressure plate fixture 100 is capable of reciprocating along a first direction. The positioning fixture is used to position the workpiece to be welded, and the positioning fixture is located on the opposite side of the pressure plate fixture 100 along the first direction. The welding fixture is used to weld the workpiece pressed by the pressure head 2 of the pressure plate fixture 100.

[0142] Since the welding device includes the pressing plate fixture 100, the workpiece to be welded can be pressed by the pressing plate fixture 100 before welding, thereby reducing the occurrence of adverse conditions such as welding defocusing and cold welding caused by accidental movement of the workpiece during the welding process, improving the quality of welding and ensuring the reliability of the welding device.

[0143] In the embodiment of the present disclosure, the positioning tool is a tool for positioning the workpiece to be welded. The positioning tool is located on the opposite side of the pressure plate tool 100 along the first direction. When the workpiece is positioned in the positioning tool, the pressure plate tool 100 moves toward the positioning tool along the first direction and presses the workpiece to be welded on the positioning tool. After pressing, the welding tool welds the workpiece pressed by the pressure head 2.

[0144] In some other embodiments, after the workpiece is positioned, the positioning tool may move along the first direction toward the pressing plate tool 100 to press and tighten the workpiece.

[0145] Welding tooling is a tooling for welding workpieces, including but not limited to laser welding tooling, ultrasonic welding tooling, resistance welding tooling, etc. The embodiments of the present disclosure do not specifically limit the types of welding tooling.

[0146] Specific examples of some embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0147] As a specific example, the pressure plate fixture 100 includes an upper pressure plate (pressure plate 1) and two pressure heads (pressure heads 2), and the pressure heads and the upper pressure plate are limited by guide edges (first rib 131, second rib 231). The spacing distance between the guide edges of the pressure heads and the guide edges of the upper pressure plate along the first direction defines the floating size of the pressure heads along the first direction. The pressure plate fixture 100 includes a special screw (limiting member 3), the thread of the screw is only located in the upper half of the screw (first rod 321), and the lower half (second rod 322) is an optical axis structure. The upper half of the screw is locked to the upper pressure plate, and a spring structure (elastic member 4) is provided on the optical axis of the lower half, and the lower half extends into the blind hole of the pressure head. Two anti-loosening washers (gasket 5) are also installed between the screw and the upper pressure plate, and the two anti-loosening washers are provided with serrated portions, and the relative serrated portions of the two anti-loosening washers are engaged with each other.

[0148] In this way, through the special screw design and the two-way anti-loosening gasket, the screw can be prevented from loosening to the greatest extent, thereby reducing the possibility of misalignment between the pressure head and the upper pressure plate and the possibility of floating failure of the pressure head, thereby improving the reliability of welding.

[0149] The above embodiments are intended only to illustrate the technical solutions of the present disclosure, and are not intended to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they may modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. Such modifications or replacements do not deviate from the essence of the corresponding technical solutions and are intended to be included within the scope of the present disclosure. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts.

Claims

1. A press plate tool, comprising at least one press plate assembly, wherein the press plate assembly comprises: A pressing plate is provided with a through hole extending along a first direction; a pressing head, which is arranged on the pressing plate in a manner capable of moving relative to the pressing plate along the first direction, and the pressing head is provided with a limiting hole extending along the first direction, the limiting hole being coaxial with and connected to the through hole; and The limiting member includes a head and a rod, the rod including a first rod and a second rod connected along the first direction, the first rod having a thread formed thereon, the thread of the first rod being fastened to the thread in the through hole, the second rod extending into the limiting hole, and the second rod being loosely fitted with the inner surface of the limiting hole; Wherein, the dimension of the second rod portion extending into the limiting hole is smaller than the dimension of the limiting hole extending along the first direction.

2. The pressing plate tool according to claim 1, wherein: The limiting hole includes a blind hole.

3. The pressing plate tool according to claim 1 or 2, wherein: The pressing plate tooling further includes an elastic member, which is sleeved on the second rod portion and is used to apply elastic force to the pressing head; The through hole includes a first section and a second section, the first section is located on a side of the second section facing away from the pressure head along the first direction, and the aperture of the first section is smaller than the aperture of the second section; The thread in the through hole is formed on the inner wall of the first section, the elastic member is partially located in the second section, and one end of the elastic member abuts against the end face of the first section on the side away from the pressure plate along the first direction, and the other end of the elastic member abuts against the end face of the pressure head on the side close to the pressure plate along the first direction.

4. The pressing plate tool according to any one of claims 1 to 3, wherein: The pressing plate assembly includes at least one gasket, which is sleeved on the limiting member and located between the head and the pressing plate.

5. The pressing plate tool according to claim 4, wherein: The two end surfaces of the gasket facing each other along the first direction are respectively formed with a first serration and a second serration. When there are multiple gaskets, the first serration and the second serration on opposite surfaces of adjacent gaskets can mesh with each other.

6. The pressing plate tool according to claim 5, wherein: The first serration portion includes a plurality of first oblique teeth distributed circumferentially around the axis of the gasket, and the second serration portion includes a plurality of second oblique teeth distributed circumferentially around the axis of the gasket. The first oblique teeth and the second oblique teeth have opposite inclination directions.

7. The pressing plate tool according to claim 6, wherein: The first oblique teeth are evenly distributed along the entire circumference of the gasket; and / or The second oblique teeth are evenly distributed along the entire circumference of the gasket.

8. The pressing plate tool according to any one of claims 4 to 7, wherein: A countersunk hole is formed on the surface of the through hole facing away from the pressure head. The head of the limiting member is located in the countersunk hole. The gasket is located between the head and the bottom end surface of the countersunk hole.

9. The pressing plate tool according to any one of claims 1 to 8, wherein: The pressure head includes a hook portion extending along the second direction, the pressure plate includes a slot extending along the second direction, the slot is used for the hook portion to be inserted, and the pressure head is arranged on the pressure plate through the engagement between the hook portion and the slot; When the hook portion is inserted into the slot, the hook portion can reciprocate in the slot along the first direction, and the second direction is perpendicular to the first direction.

10. The pressing plate tool according to claim 9, wherein: The end of the slot protrudes along the third direction to form a first rib, and the hook portion protrudes along the third direction to form a second rib, and the first rib and the second rib extend in opposite directions along the third direction; The third direction is perpendicular to both the first direction and the second direction.

11. The pressing plate tool according to claim 9 or 10, wherein: The corners of the hook portion are in a right-angled shape, and the corners of the slot are provided with extension grooves with a circular cross-section.

12. The pressing plate tool according to any one of claims 3 to 11, wherein: The elastic member includes a spring.

13. The pressing plate tool according to any one of claims 1 to 12, wherein: The number of the pressing plate assemblies is two; The pressure plates of the two pressure plate assemblies are connected to each other; or The pressing plates of the two pressing plate assemblies are formed into an integral structure.

14. The pressing plate tool according to claim 13, wherein: The pressing plates of the two pressing plate assemblies are connected to each other, and the pressing heads of the two pressing plate assemblies are spaced apart along the second direction; The second direction is perpendicular to the first direction.

15. The press plate fixture according to any one of claims 1 to 14, wherein: The pressing plate tooling also includes an identification code; A groove is formed on the surface of the pressing plate facing away from the pressing head, and the identification code is arranged in the groove.

16. The press tool according to claim 15, wherein: The groove is rectangular, and the four corners of the groove extend outward in semicircles.

17. The pressing plate tool according to claim 15 or 16, wherein: The identification code includes a QR code, a bar code or a radio frequency identification code.

18. The press plate fixture according to any one of claims 1 to 17, wherein: The pressing plate is formed with a first through hole extending along the first direction, and the pressing head is formed with a second through hole extending along the first direction. The first through hole and the second through hole are coaxial and communicated, and together define a welding channel for performing a welding operation.

19. The platen tooling according to claim 18, wherein: The equivalent diameter of the welding channel gradually decreases along the first direction, the opening at the end with the largest equivalent diameter is formed on the first through hole, and the opening at the end with the smallest equivalent diameter is formed on the second through hole.

20. A welding device, comprising: The pressing plate fixture according to any one of claims 1 to 19, wherein the pressing plate fixture is capable of reciprocating along a first direction; A positioning tool, used for positioning the workpiece to be welded, the positioning tool being located on the opposite side of the pressing plate tool along the first direction; and A welding tool is used to weld the workpiece pressed by the pressure head of the pressure plate tool.

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