Steel-aluminum connection structure, method, controller, and medium

Abstract

The application discloses a steel-aluminum connecting structure, a method, a controller and a medium, and the steel-aluminum connecting structure comprises a steel plate, an aluminum plate and a press riveting steel sheet; the press riveting steel sheet comprises a press riveting body and a riveting leg arranged on the press riveting body. The application sets the press riveting steel sheet between the aluminum plate and the steel plate, and the press riveting steel sheet is riveted and fixed on the aluminum plate through the riveting leg, and the steel plate is connected with the press riveting steel sheet through a first spot welding joint formed by spot welding. The application realizes stable connection between the steel and the aluminum through a riveting process and a spot welding process suitable for a steel body, thereby realizing collinear production of a steel-aluminum mixed body and the steel body, and greatly reducing production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a steel-aluminum connecting structure, method, controller and medium. BACKGROUND

[0002] At present, the steel-aluminum part connection in the automobile industry can be realized by using the self-piercing rivet (SPR) and flow drill screw (FDS) processes, while for the steel vehicle body, the commonly used connecting process of automobile enterprises is spot welding.

[0003] If the self-piercing rivet and flow drill screw processes are used to realize the production of steel-aluminum vehicle bodies, the SPR riveting and FDS riveting equipment need to be purchased, or a special steel-aluminum mixed production line needs to be established, which will greatly increase the cost. At the same time, other riveting processes in the prior art cannot realize the connection of two layers of high-strength steel and aluminum alloy. SUMMARY

[0004] The embodiments of the present application provide a steel-aluminum connecting structure, method, controller and medium to solve the problem that the riveting process in the prior art cannot realize the connection of high-strength steel and aluminum alloy.

[0005] A steel-aluminum connecting method, comprising a steel plate, an aluminum plate and a press rivet steel sheet; the press rivet steel sheet comprises a press rivet body and a rivet leg provided on the press rivet body, the press rivet steel sheet is riveted with the aluminum plate through the rivet leg; and an end face of the press rivet body away from the rivet leg is welded with the steel plate.

[0006] A steel-aluminum connecting method, comprising:

[0007] controlling a press riveting device to rivet a press rivet steel sheet on an aluminum plate; the press rivet steel sheet comprises a press rivet body and a rivet leg provided on the press rivet body, the press rivet steel sheet is riveted with the aluminum plate through the rivet leg;

[0008] controlling a first welding device to spot weld the press rivet steel sheet and the steel plate according to preset spot welding parameters, so as to connect the press rivet steel sheet and the steel plate through a first spot welding joint formed between the first spot welding surface and the steel plate; the first spot welding surface refers to an end face of the press rivet body away from the rivet leg.

[0009] A controller, the controller is used to execute the above-mentioned steel-aluminum connecting method.

[0010] A computer readable storage medium, the computer readable storage medium stores a computer program, the computer program is executed by a processor to realize the above-mentioned steel-aluminum connecting method.

[0011] In the steel-aluminum connecting structure, the method, the controller and the medium, the riveting steel sheet includes a riveting body and a riveting leg arranged on the riveting body, after the riveting device is controlled to rivet the riveting leg of the riveting steel sheet on the aluminum plate; the first welding device is controlled to spot weld the riveting steel sheet and the steel plate according to preset spot welding parameters, so as to connect the riveting steel sheet and the steel plate through a first spot welding joint formed between the first spot welding surface and the steel plate; the first spot welding surface refers to an end surface of the riveting body away from the riveting leg.

[0012] The riveting steel sheet is arranged between the aluminum plate and the steel plate, and the riveting leg arranged on the riveting steel sheet can be riveted and fixed on the surface of the aluminum plate to be connected with the steel plate, then the steel plate can be spot welded with the first electric welding surface of the riveting steel sheet, so that the first spot welding joint is formed between the first spot welding surface and the steel plate, and finally the stable connection between the steel plate and the aluminum plate is realized. The riveting process and the spot welding process suitable for the steel body are used to realize the stable connection between the steel plate (such as high-strength steel) and the aluminum plate (such as aluminum alloy), so that the collinear production of the steel-aluminum mixed body and the steel body can be realized, and the production cost is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0014] Figure 1 is a structure schematic diagram of the steel-aluminum connecting structure before connection in an embodiment of the present application;

[0015] Figure 2 is a structure schematic diagram of the steel-aluminum connecting structure after connection in an embodiment of the present application;

[0016] Figure 3 is a schematic diagram of riveting the riveting steel sheet to the aluminum plate in the steel-aluminum connecting method in an embodiment of the present application;

[0017] Figure 4 is a schematic diagram of resistance welding of the riveting steel sheet and the aluminum plate by the second welding device in the steel-aluminum connecting method in an embodiment of the present application;

[0018] Figure 5 is a schematic diagram of spot welding of the riveting steel sheet and the steel plate by the first welding device in the steel-aluminum connecting method in an embodiment of the present application;

[0019] Figure 6 is a flow chart of the steel-aluminum connecting method in an embodiment of the present application;

[0020] Figure 7 is a schematic diagram of a computer device in an embodiment of the present application.

[0021] The reference signs in the description are as follows:

[0022] 1, steel plate; 2, riveting steel sheet; 21, rivet leg; 22, protrusion; 3, aluminum plate; 4, riveting device; 5, second welding device; 6, first welding device. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0024] In an embodiment, as shown in Figure 1 and Figure 2 , a steel-aluminum connecting structure is provided, which comprises a steel plate 1, an aluminum plate 3, and a riveting steel sheet 2; the riveting steel sheet 2 comprises a riveting body and a rivet leg 21 arranged on the riveting body, the riveting steel sheet 2 is riveted with the aluminum plate 3 through the rivet leg 21; and an end face of the riveting body away from the rivet leg 21 is welded with the steel plate 1.

[0025] The riveting steel sheet 2 is a bridge for connecting the steel plate 1 (such as high-strength steel) and the aluminum plate 3 (such as an aluminum alloy plate with an oxide layer), and the riveting steel sheet 2 is riveted with the aluminum plate 3 through the riveting leg 21 to form a firm riveting joint. Understandably, in the process of riveting the riveting steel sheet 2 to the aluminum plate 3 through the riveting leg 21, the riveting leg 21 penetrates the oxide layer (non-conductive) of the aluminum plate 3 and is inserted into the aluminum plate 3, and then in the subsequent welding process, the welding current (such as the first welding current and the second welding current mentioned later) between the aluminum plate 3 and the riveting steel sheet 2 and the steel plate 1 can be conducted through the riveting leg 21. Moreover, the riveting steel sheet 2 and the steel plate 1 form a firm first spot welding joint through spot welding, so that the steel plate 1 and the aluminum plate 3 are stably connected. Understandably, when the riveting steel sheet 2 and the steel plate 1 are spot welded, one or more first spot welding joints (each first spot welding joint corresponds to at least one first position point on the first spot welding surface) are formed on the first spot welding surface of the riveting steel sheet 2 opposite to the steel plate 1, and at the same time, one or more second spot welding joints corresponding to the second position points (opposite to the first position points) of the first spot welding joints are also formed on the second spot welding surface (the end surface of the riveting steel sheet 2 opposite to the first spot welding surface) of the riveting steel sheet 2 opposite to the aluminum plate 3, and the second spot welding joints also have a certain strength and can be used in cooperation with the riveting leg 21 to further stably connect the aluminum plate 3 and the riveting steel sheet 2. The steel-aluminum connecting structure of the present application has simple structure, simple and reliable connecting process, firm first spot welding joint of the riveting steel sheet 2 and the steel plate 1, and good joint strength and no weak points of the aluminum plate 3 and the riveting steel sheet 2 connected through the riveting leg 21 and the second spot welding joint. Moreover, the above-mentioned riveting steel sheet 2 only needs to be provided in one specification to be applicable to steel plates 1 and aluminum plates 3 of all thicknesses, and has wide applicability.

[0026] The present application adds the riveting steel sheet 2 between the aluminum plate 3 and the steel plate 1, and the riveting leg 21 provided on the riveting steel sheet 2 can be riveted and fixed on the surface of the aluminum plate 3 to be connected with the steel plate 1, and then the steel plate 1 can be spot welded with the first spot welding surface of the riveting steel sheet 2, so that the first spot welding surface and the steel plate 1 form a first spot welding joint (one or more second spot welding joints corresponding to the second position points of the first spot welding joints are also formed on the second spot welding surface of the riveting steel sheet 2 opposite to the aluminum plate 3), and finally the stable connection between the steel plate 1 and the aluminum plate 3 is realized. The present application realizes the stable connection between the steel plate 1 (such as high-strength steel) and the aluminum plate 3 (such as aluminum alloy) through the riveting process and the spot welding process suitable for steel car bodies, so that the steel-aluminum hybrid car body and the steel car body can be produced in the same line, and the production cost is greatly reduced.

[0027] Further, as Figure 1 and Figure 2As shown, the rivet legs 21 form a riveting space, and the press-fit steel sheet 2 also includes a plurality of protrusions 22 spaced apart on the press-fit body. All the protrusions 22 are located within the riveting space, and are used to pierce the oxide layer of the aluminum plate 3 and insert into the aluminum plate 3. Understandably, the protrusions 22 are evenly spaced on the second welding surface of the press-fit body. During the process of riveting the press-fit steel sheet 2 to the aluminum plate 3 using the rivet legs 21, both the rivet legs 21 and the protrusions 22 penetrate the oxide layer of the aluminum plate 3 (the oxide layer is non-conductive) and insert into the aluminum plate 3. Therefore, in the subsequent welding process, the welding current (such as the first welding current and the second welding current mentioned later) between the aluminum plate 3, the press-fit steel sheet 2, and the steel plate 1 can be conducted through the rivet legs 21 and the protrusions 22. Understandably, the protrusions 22 increase the contact area between the press-fit steel sheet 2 and the aluminum plate 3, thereby making the welding current flow more smoothly in the subsequent welding process, which is beneficial to improving the welding quality.

[0028] In one embodiment, such as Figure 6 As shown, a steel-aluminum connection method is provided, including the following steps:

[0029] S10: Control the riveting equipment to rivet the riveting steel sheet 2 onto the aluminum plate 3; the riveting steel sheet 2 includes a riveting body and a rivet leg 21 disposed on the riveting body, and the riveting steel sheet 2 is riveted to the aluminum plate 3 through the rivet leg 21; specifically, as shown Figure 3 As shown, the aluminum plate 3 is placed into the riveting equipment and the riveting steel sheet 2 is installed. After the rivet leg 21 is set facing the aluminum plate 3, the riveting steel sheet 2 can be pressed onto the aluminum plate 3, so that the rivet leg 21 penetrates the oxide layer (the oxide layer is non-conductive) of the aluminum plate 3 and inserts into the aluminum plate 3, thereby making the riveting steel sheet 2 riveted to the aluminum plate 3 through the rivet leg 21 to form a firm riveting joint.

[0030] S20: The first welding device 6 is controlled to perform spot welding on the press-fit steel sheet 2 and the steel plate 1 according to preset spot welding parameters, so as to connect the press-fit steel sheet 2 and the steel plate 1 through a first spot weld joint formed between the first spot weld surface and the steel plate 1; the first spot weld surface refers to the end face of the press-fit body that is away from the rivet leg 21. Understandably, the first welding device 6 can be a welding gun. Further, the preset spot welding parameters include, but are not limited to, the following parameters: first pressure of 3KN-5KN, first welding current of 10KA-40KA, and first welding time of 50ms-500ms. Under the above preset spot welding parameters, a stable spot weld connection between the steel plate 1 and the press-fit steel sheet 2 can be achieved.

[0031] Understandably, such as Figure 4As shown, since the rivet leg 21 penetrates the oxide layer (the oxide layer is not conductive) of the aluminum plate 3 and is inserted into the aluminum plate 3, the oxide layer on the aluminum plate 3 (on the end surface of the aluminum plate 3 away from the end surface of the rivet steel sheet 2) attached to the first welding device 6 will be pierced at the spot welding process in step S20, at this time, the first welding current between the aluminum plate 3 and the rivet steel sheet 2 and the steel plate 1 can be conducted through the rivet leg 21, and under the action of the first welding current, the rivet steel sheet 2 and the steel plate 1 are spot-welded to form a firm first spot-welded joint, so that the steel plate 1 and the aluminum plate 3 are firmly connected.

[0032] Further, the step S20, that is, the control of the first welding device 6 to spot-weld the rivet steel sheet 2 and the steel plate 1 according to the preset spot welding parameters to connect the rivet steel sheet 2 and the steel plate 1 through the first spot-welded joint formed between the first spot-welding surface and the steel plate 1, further comprises: controlling the first welding device 6 to spot-weld the rivet steel sheet 2, the steel plate 1 and the aluminum plate 3 according to the preset spot welding parameters, to connect the rivet steel sheet 2 and the steel plate 1 through the first spot-welded joint formed between the first spot-welding surface and the steel plate 1 at at least one first position point, and to form a second spot-welded joint between the second spot-welding surface and the aluminum plate 3 at at least one second position point; the first position points and the second position points are arranged one by one.

[0033] Understandably, when the rivet steel sheet 2 and the steel plate 1 are spot-welded, one or more first spot-welded joints (each first spot-welded joint corresponds to at least one first position point on the first spot-welding surface) are formed on the first spot-welding surface of the rivet steel sheet 2 opposite to the steel plate 1, and one or more second spot-welded joints are also formed on the second spot-welding surface of the rivet steel sheet 2 opposite to the first spot-welding surface (that is, the end surface of the rivet steel sheet 2 away from the first spot-welding surface) at the second position points (that is, the position points opposite to the first position points) corresponding to the first spot-welded joints, the second spot-welded joints also have a certain strength and can be used in cooperation with the rivet leg 21 to further firmly connect the aluminum plate 3 and the rivet steel sheet 2. The above-mentioned steel-aluminum connection method of the present application is simple and reliable in process, and the rivet steel sheet 2 and the steel plate 1 can obtain a firm first spot-welded joint through spot welding, and the rivet steel sheet 2 and the aluminum plate 3 can be connected through the rivet leg 21 and the second spot-welded joint, the steel-aluminum connection structure has good joint strength and no weak points. Moreover, the above-mentioned rivet steel sheet 2 only needs to be provided in one specification to be applicable to steel plates 1 and aluminum plates 3 of all thicknesses, and has wide applicability.

[0034] This invention adds a riveting steel sheet 2 between the aluminum plate 3 and the steel plate 1. The riveting legs 21 on the riveting steel sheet 2 can be riveted and fixed to the surface of the aluminum plate 3 to be connected to the steel plate 1. Then, the steel plate 1 can be spot-welded to the first welding surface of the riveting steel sheet 2, forming a first spot weld joint between the first welding surface and the steel plate 1, ultimately achieving a stable connection between the steel plate 1 and the aluminum plate 3. This invention achieves a stable connection between the steel plate 1 (e.g., high-strength steel) and the aluminum plate 3 (e.g., aluminum alloy) through riveting and spot welding processes suitable for steel car bodies. This enables the co-production of steel-aluminum hybrid car bodies and steel car bodies on the same production line, significantly reducing production costs.

[0035] In one embodiment, the rivet legs 21 form a riveting space, and the press-fit steel sheet 2 further includes a plurality of protrusions 22 spaced apart on the press-fit body, all of which are located within the riveting space; understandably, the plurality of protrusions 22 are evenly spaced apart on the second spot welding surface of the press-fit body.

[0036] Further, in step S10, the process of controlling the riveting device to rivet the riveting steel sheet 2 onto the aluminum plate 3 includes: controlling the riveting device to press the riveting steel sheet 2 and the aluminum plate 3 together, so that the rivet leg 21 and the spike 22 are inserted into the aluminum plate 3, and the riveting body is in contact with the aluminum plate 3. That is, during the process of riveting the riveting steel sheet 2 onto the aluminum plate 3 via the rivet leg 21, both the rivet leg 21 and the spike 22 penetrate the oxide layer (the oxide layer is non-conductive) of the aluminum plate 3 and insert into the aluminum plate 3. Consequently, in the subsequent welding process, the welding current (such as the first welding current and the second welding current) between the aluminum plate 3, the riveting steel sheet 2, and the steel plate 1 can be conducted through the rivet leg 21 and the spike 22. Understandably, setting the spike 22 can increase the contact area between the riveting steel sheet 2 and the aluminum plate 3, thereby making the welding current in the subsequent welding process smoother, which is beneficial to improving the welding quality.

[0037] In one embodiment, such as Figure 5 As shown, before step S20, the following steps are performed: The riveting device presses the riveting steel sheet 2 and the aluminum plate 3 together, so that the rivet leg 21 and the protrusion 22 are inserted into the aluminum plate 3. After the riveting body is in contact with the aluminum plate 3, the following steps are also performed:

[0038] The second welding device 5 is controlled to perform resistance welding on the steel sheet 2 and the aluminum plate 3 according to preset resistance welding parameters, so that the aluminum plate 3 and the inserted protrusion 22 form a bite after the contact position of the aluminum plate 3 and the inserted protrusion 22 enters a molten state under the action of resistance heat. The second welding device 5 can be another device independent of the riveting device, or can be integrated in the riveting device to further realize the co-linear production of the steel-aluminum hybrid vehicle body and the steel vehicle body. Further, the preset resistance welding parameters include but are not limited to the following parameters: the second pressure is 3-4KN, the second welding current is 10KA-30KA, and the second welding time is 1000ms-2000ms. Since the resistance welding only needs to make the contact position of the aluminum plate 3 and the inserted protrusion 22 (and the rivet leg 21) enter a molten state, the welding current required is relatively small compared to the spot welding, so the second welding current is less than the first welding current. Since the area of the position that needs to enter the molten state on the aluminum plate 3 is larger than that of the spot welding, the second welding time needs to be greater than the first welding time to make the protrusion 22 and the aluminum plate 3 fully bite.

[0039] Understandably, the bite of the protrusion 22 and the aluminum plate 3 means that the position of the protrusion 22 (and the rivet leg 21) inserted into the aluminum plate 3 is completely wrapped and fitted on the protrusion 22 (and the rivet leg 21) after generating resistance heat and entering a molten state (the melting point of the aluminum plate 3 is low, and it enters a molten state first), so that the gap between the protrusion 22 (and the rivet leg 21) and the aluminum plate 3 disappears after the protrusion 22 (and the rivet leg 21) is inserted into the aluminum plate 3, and the contact area between the protrusion 22 (and the rivet leg 21) and the aluminum plate 3 is larger, and the current conduction effect is better.

[0040] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0041] The present application also provides a controller for performing the above-mentioned steel-aluminum connection method. For specific limitations of the controller, please refer to the above limitations of the steel-aluminum connection method, which will not be repeated here.

[0042] Each module in the above controller can be realized by software, hardware and their combination in whole or in part. The above modules can be embedded in or independent of the processor in the computer device in hardware form, or stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to the above modules. Understandably, the controller can be regarded as one or more computer devices, such as Figure 7As shown, the computer device includes a processor, a memory, a network interface and a database connected through a system bus. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The database of the computer device is configured to store data used in the steel-aluminum connection method in the above embodiments. The network interface of the computer device is configured to communicate with an external terminal through a network connection. The computer program is configured to be executed by the processor to implement a steel-aluminum connection method.

[0043] In one embodiment, a computer readable storage medium is provided, which stores a computer program. The computer program is configured to be executed by a processor to implement the steel-aluminum connection method.

[0044] Those skilled in the art can understand that all or part of the processes in the above embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, it can include the processes of the above embodiments. Any reference to a memory, storage, database or other medium in the embodiments provided by the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM) and memory bus dynamic RAM (RDRAM) and the like.

[0045] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified. In actual applications, the above functions can be completed by different functional units and modules according to needs, i.e. the internal structure of the device is divided into different functional units or modules to complete all or part of the above described functions.

[0046] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A steel-aluminum connection structure, characterized in that, The device includes a steel plate, an aluminum plate, and a riveting steel sheet. The riveting steel sheet includes a riveting body and a rivet leg disposed on the riveting body. The riveting steel sheet is riveted to the aluminum plate through the rivet leg. The riveting body is spot welded to the steel plate at a first spot welding surface away from the rivet leg, forming a first spot weld joint connecting the riveting steel sheet and the steel plate at at least one first position point between the first spot welding surface and the steel plate. At the same time, a second spot weld joint connecting the riveting steel sheet and the aluminum plate is formed at at least one second position point between the second spot welding surface of the riveting body and the aluminum plate. The second spot welding surface is disposed on the end face of the riveting body away from the first spot welding surface, and the first position point and the second position point are respectively provided.

2. The steel-aluminum joining structure according to claim 1, wherein The rivet legs form a riveting space, and the press-fit steel sheet also includes a plurality of protrusions spaced apart on the press-fit body. The plurality of protrusions are all located within the riveting space, and the protrusions are used to pierce the oxide layer of the aluminum plate and insert into the aluminum plate.

3. A steel-aluminum joining method characterized by, include: The riveting equipment is controlled to rivet a steel sheet onto an aluminum plate; the steel sheet includes a riveting body and a rivet leg disposed on the riveting body, and the steel sheet is riveted to the aluminum plate through the rivet leg; The first welding equipment is controlled to perform spot welding on the press-fit steel sheet and the steel plate according to the preset spot welding parameters, so as to connect the press-fit steel sheet and the steel plate through the first spot weld joint formed between the first spot weld surface and the steel plate; the first spot weld surface refers to the end face of the press-fit body that is away from the rivet leg; The method of controlling the first welding equipment to perform spot welding on the press-fit steel sheet and the steel plate according to preset spot welding parameters, so as to connect the press-fit steel sheet and the steel plate through the first spot weld joint formed between the first spot weld surface and the steel plate, further includes: The first welding equipment is controlled to perform spot welding on the press-fit steel sheet, the steel plate and the aluminum plate according to the preset spot welding parameters, so as to connect the press-fit steel sheet and the steel plate through a first spot weld joint formed at at least one first position point between the first spot weld surface and the steel plate, and at the same time, a second spot weld joint is formed at at least one second position point between the second spot weld surface and the aluminum plate. The first position point and the second position point are set in a one-to-one correspondence.

4. The steel-aluminum joining method according to claim 3, characterized by The preset spot welding parameters include: a first pressure of 3KN-5KN, a first welding current of 10KA-40KA, and a first welding duration of 50ms-500ms.

5. The steel-aluminum joining method of claim 3, wherein The rivet legs form a riveting space, and the press-fit steel sheet further includes a plurality of protrusions spaced apart on the press-fit body, all of which are located within the riveting space; The controlled riveting device rivets the riveting steel sheet to the aluminum plate, including: The riveting device is controlled to press the riveting steel sheet and the aluminum plate together, so that the rivet leg and the protrusion are inserted into the aluminum plate, and the riveting body is in contact with the aluminum plate.

6. The steel-aluminum joining method of claim 5, wherein Before controlling the riveting device to press the riveting steel sheet and the aluminum plate together, so that the rivet legs and the protrusions are inserted into the aluminum plate, and after the riveting body is in contact with the aluminum plate, before controlling the first welding device to spot weld the riveting steel sheet and the steel plate according to preset spot welding parameters, the method further includes: The second welding device is controlled to perform resistance welding on the steel sheet and the aluminum plate according to preset resistance welding parameters, so that the aluminum plate and the inserted protrusion form a bite after the contact position of the aluminum plate and the inserted protrusion enters a molten state under the action of resistance heat.

7. The steel-aluminum joining method of claim 6, wherein The preset resistance welding parameters include: a second pressure of 3-4 KN, a second welding current of 10 KA-30 KA, and a second welding duration of 1000 ms-2000 ms.

8. A controller characterized by comprising: The controller is configured to perform the steel-aluminum connection method according to any one of claims 3-7.

9. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 8. The computer program is configured to perform the steel-aluminum connection method according to any one of claims 3-7 when executed by a processor.

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