Combined welding control device for automobile rear hub package

Abstract

The invention relates to the technical field of welding equipment, and provides an automobile rear hub package combined welding control device which is used for welding an accessory to a welding area of a basic part to form a rear hub package, and an electric heating bearing plate is used for bearing the basic part and preheating the welding area of the basic part. The shape of the electric heating bearing plate is configured to be matched with the shape of the bottom face of the welding area of the basic part. The welding support is arranged on the machine frame, the swing arm is arranged on the welding support in a swinging mode, the pressing head is arranged at the end of the swing arm and can vertically swing along with the swing arm and press an accessory to a welding area of a basic part, a pressure sensor used for detecting pressure parameters between the pressing head and the accessory is arranged on the pressing head, and the electric heating bearing plate is electrically connected with a controller. The pressure sensor is electrically connected with the controller, and the controller is used for receiving the pressure parameters and sending preheating signals to the electric heating bearing plate. According to the technical scheme, the technical problem that in the related technology, welding stress is likely to occur in the welding area, and the welding quality is affected is solved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of welding equipment, and more specifically, to a combined welding control device for automotive rear wheel arch assemblies. Background Art

[0002] In the automotive manufacturing industry, many automotive components rely on welding technology for assembly. As one of the important components of an automobile, the rear wheel arch has an important impact on the driving stability, load-bearing capacity, and appearance of the vehicle.

[0003] In traditional rear wheel arch welding, in actual operation, there is a problem that the temperature of the welding area is relatively low, while the temperature of the welding head is relatively high during operation, resulting in a large temperature difference between the two. This large temperature difference will generate welding stress during the welding process. The generation of welding stress may cause cracks at the welded joints, reducing the welding strength. It may also cause deformation of the rear wheel arch, affecting its dimensional accuracy and appearance quality, and increasing production costs.

[0004] Therefore, how to effectively solve the welding stress problem caused by temperature difference during the welding of the rear wheel arch and improve the welding quality has become an important problem that needs to be solved urgently in the automotive manufacturing field. Summary of the Invention

[0005] To overcome the above defects, embodiments of the present invention provide a combined welding control device for automotive rear wheel arch assemblies, which solves the technical problem that welding stress is likely to occur in the welding area in related technologies, affecting the welding quality.

[0006] According to one aspect, at least one embodiment of the present invention provides a combined welding control device for automotive rear wheel arch assemblies, which is used to weld fittings to the welding area of a base part to form a rear wheel arch, and includes a frame, an electric heating support plate, and a welding positioning assembly. The electric heating support plate is arranged on the frame and is used to support the base part and preheat the welding area of the base part. The shape of the electric heating support plate is configured to match the shape of the bottom surface of the welding area of the base part. The welding positioning assembly includes a welding bracket, a swing arm, and a pressing head. The welding bracket is arranged on the frame. The swing arm is swingably arranged on the welding bracket. The pressing head is arranged at the end of the swing arm and can swing vertically along with the swing arm to press the fitting against the welding area of the base part. A pressure sensor for detecting the pressure parameter between the pressing head and the fitting is arranged on the pressing head. The electric heating support plate is electrically connected to a controller. The pressure sensor is electrically connected to the controller. The controller is used to receive the pressure parameter and send a preheating signal to the electric heating support plate.

[0007] For example, in the combined welding control device for automotive rear wheel arch assemblies provided by at least one embodiment of the present invention, it further includes: A plurality of base positioning components arranged around a base member, the base positioning components including a base bracket and a pressing rod, the base bracket being provided on the frame, the base bracket having a supporting portion, the supporting portions of the plurality of base brackets being used for jointly supporting the bottom of the outer ring of the base member, the pressing rod being swingably provided on the base bracket, and the pressing rod being capable of vertically swinging to press the top of the outer ring of the base member.

[0008] For example, in the automotive rear hub package combined welding control device provided by at least one embodiment of the present invention, it further includes: A welding robotic arm is provided beside the frame, an installation plate is provided at the execution end of the welding robotic arm, a welding head is provided on the installation plate, and the welding head can move under the drive of the welding robotic arm.

[0009] For example, in the automotive rear hub package combined welding control device provided by at least one embodiment of the present invention, it further includes: A protective cover is movably provided on the installation plate, there are two protective covers which are respectively located on both sides of the welding head, and the two protective covers can approach each other to enclose the periphery and below of the welding head, or move away from each other and open to expose the welding head.

[0010] For example, in the automotive rear hub package combined welding control device provided by at least one embodiment of the present invention, it further includes: Two symmetrically arranged arc-shaped guide rails are provided on the installation plate, a guide wheel is rotatably provided on each protective cover, the guide wheel is located in the guide rail, and the guide wheel is used for rolling in the guide rail; The protective cover can be brought into contact with the surface of the base member under the drive of the welding head, and under the pressing action of the base member, the guide wheel rolls along the guide rail to make the two protective covers move away from each other and open.

[0011] For example, in the automotive rear hub package combined welding control device provided by at least one embodiment of the present invention, it further includes: The lower edge of the protective cover has an installation groove, and a cleaning cloth strip is detachably provided in the installation groove, and the cleaning cloth strip is used for wiping the surface of the base member when the protective cover is opened.

[0012] For example, in the automotive rear hub package combined welding control device provided by at least one embodiment of the present invention, it further includes: A compensation plate is connected between the two protective covers, both opposite sides of the two protective covers have chutes with opposite openings, both ends of the compensation plate are respectively slidably provided in the two chutes, and the compensation plate can slide out of the chutes when the protective covers move away from each other, so as to cooperate with the two protective covers to enclose the periphery of the welding head.

[0013] For example, in the automotive rear hubcap assembly welding control device provided by at least one embodiment of the present invention, it further includes: Both of the two shields are provided with guide rings. The two guide rings are coaxially arranged and a guide rod penetrates through them. The guide rings can move away from each other following the shields and are slidably engaged with the guide rod.

[0014] For example, in the automotive rear hubcap assembly welding control device provided by at least one embodiment of the present invention, it further includes: A spring is connected between the mounting plate and the shield. The spring is used to provide a force for the shield to move downward along the guide rail, so that the two shields are closed.

[0015] For example, in the automotive rear hubcap assembly welding control device provided by at least one embodiment of the present invention, it further includes: The shield is provided with a pin hole, and a retaining pin is slidably arranged on the mounting plate. The retaining pin is used to insert into the pin hole after the shield moves upward and opens, so that the shield maintains an open state.

[0016] The beneficial effects of the embodiments of the present invention are as follows: In the present invention, when welding the rear hubcap, the base part is placed on the frame, and the electrothermal supporting plate supports the bottom surface of the welding area of the base part. Then the fitting is placed in the welding area of the base part, the swing arm swings downward, and the pressing head presses the fitting to position the fitting, and at the same time triggers the pressure sensor. The pressure sensor transmits a signal to start preheating to the controller of the electrothermal supporting plate, and the controller controls the electrothermal supporting plate to heat, thereby preheating the welding area of the base part. By preheating the welding area in advance, its temperature is increased, the temperature difference with the welding head is reduced, and thus the welding stress is reduced.

[0017] On the other hand, the base part of the rear hubcap is generally approximately semicircular, and the shape of the middle part of the base part is irregular and inconvenient to support. Therefore, in the prior art, the supporting components are all arranged around the base part, and the edges of the base part are supported by multiple supporting components together to achieve support. However, because there is a lack of support in the middle part, the force is concentrated on the edge, resulting in the problem of uneven force.

[0018] In this solution, by setting the electrothermal supporting plate, not only the problem of preheating the welding area is solved, the welding stress is reduced, and the welding quality is improved. Moreover, because its shape fits the bottom surface of the welding area of the base part, it can provide additional support for the middle part of the base part, improving the problem of uneven force on the base part in the traditional support method, and further ensuring the welding accuracy and quality. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the exemplary embodiments of the present invention and these drawings.

[0020] Figure 1 Schematic structural diagram of an automobile rear wheel hub package combined welding control device in an embodiment of the present invention; Figure 2 is Figure 1 Enlarged view at position A in Figure 3 is Figure 1 Schematic structural diagram of the frame in the embodiment of Figure 4 is Figure 3 Enlarged view at position B in Figure 5 is Figure 3 Enlarged view at position C in Figure 6 is Figure 1 Schematic structural diagram of the welding positioning assembly in the embodiment of Figure 7 is Figure 1 Schematic structural diagram of the shield in the embodiment of Figure 8 is Figure 1 Schematic internal structure diagram of the shield in the embodiment of Figure 9 is Figure 1 Schematic structural diagram of the shield when it is opened in the embodiment of Figure 10 is Figure 1 Enlarged view at position D in

[0021] In the figure: 1. Frame, 2. Electric heating support plate, 3. Welding positioning assembly, 301. Welding bracket, 302. Swing arm, 303. Press head, 304. Pressure sensor, 4. Basic positioning assembly, 401. Basic bracket, 402. Pressing rod, 403. Support part, 5. Welding robot arm, 6. Mounting plate, 7. Welding head, 8. Shield, 9. Guide rail, 10. Guide wheel, 801. Installation groove, 802. Cleaning cloth strip, 803. Compensation plate, 804. Chute, 11. Guide ring, 12. Guide rod, 13. Spring, 14. Pin hole, 15. Stop pin, 16. Photoelectric sensor, 17. Front baffle, 18. Basic part, 19. Fitting. Detailed implementation manners

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention, rather than limiting the present invention.

[0023] To make the drawings concise, only the parts related to the invention are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, for components with the same structure or function, only one of them is schematically shown, or only one of them is labeled. In this article, "one" not only means "only this one", but also can mean "more than one" situation, and "several" includes "two" and "more than two".

[0024] In this article, it should be noted that unless otherwise clearly defined and limited, the terms "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0026] In the description of this embodiment, the orientation or positional relationship such as "up", "down", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0027] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0028] Such as Figures 1 to 9As shown, it shows a combined welding control device for a rear wheel hub package of an automobile in an embodiment of the present invention, which is used to weld an accessory 19 to a welding area on the surface of a base member 18 to produce a rear wheel hub package, and includes a frame 1, an electric heating support plate 2, and a welding positioning assembly 3. The frame 1 is the basic supporting structure of the entire welding device, and the electric heating support plate 2 is arranged on the frame 1. Its shape matches the shape of the bottom surface of the welding area of ​​the rear wheel hub package base member 18, ensuring that it can fit closely to the base member 18 to achieve good heat transfer and support. A resistance wire or a heating plate can be arranged inside the electric heating support plate 2.

[0029] When welding the rear wheel hub package, the base member 18 is placed on the frame 1, and the electric heating support plate 2 supports the bottom surface of the welding area of ​​the base member 18. Then the accessory 19 is placed in the welding area of ​​the base member 18, the swing arm 302 swings downward, and the pressure head 303 presses the accessory 19 to achieve the positioning of the accessory 19, and at the same time triggers the pressure sensor 304. The pressure sensor 304 transmits a preheating start signal to the controller of the electric heating support plate 2, and the controller controls the electric heating support plate 2 to heat, thereby preheating the welding area of ​​the base member 18. By preheating the welding area in advance, its temperature is increased, the temperature difference between it and the welding head 7 is reduced, and the welding stress is reduced.

[0030] On the other hand, the base member 18 of the rear wheel hub package is approximately semicircular in shape as a whole, and the middle part of the base member 18 is irregular in shape, which is inconvenient to support. Therefore, the supporting components in the prior art are arranged around the base member 18, and the frame of the edge of the base member 18 is supported by multiple supporting components to achieve support. However, due to the lack of support in the middle part, the force is concentrated on the edge, resulting in uneven force.

[0031] In this solution, the electric heating support plate 2 is provided, which not only solves the problem of preheating the welding area, reduces welding stress, and improves welding quality. Moreover, since its shape matches the bottom surface of the welding area of ​​the base member 18, it can provide additional support for the middle part of the base member 18, improves the problem of uneven force on the base member 18 in the traditional support method, and further ensures the accuracy and quality of welding.

[0032] In some examples, such as Figure 1 and Figure 3 As shown, multiple groups of basic positioning components 4 are distributed around the base member 18 to ensure that all parts of the base member 18 can be effectively supported and fixed. The basic bracket 401 is set on the frame 1. As the supporting structure of the basic positioning component 4, a support part 403 is designed on the basic bracket 401. Multiple support parts 403 work together to support various parts of the frame of the base member 18. The shape of the support part 403 is adapted to the shape of the frame to ensure that it can fit closely with the frame. The pressure rod 402 is swingably installed on the basic bracket 401 and can swing flexibly. The end of the pressure rod 402 is adapted to the shape of the surface of the base member 18.

[0033] When performing the welding operation of the rear wheel hub cover, first place the base part 18 on the supporting parts 403 of multiple base brackets 401 to support the base part 18 from various positions of the border of the base part 18. Then, swing each pressure bar 402 and press the end of the pressure bar 402 against the base part 18 to prevent it from displacing or shaking during the welding process, ensuring the stability of the base part 18 during the welding process.

[0034] In some examples, such as Figure 1 shown, the welding robotic arm 5 is arranged beside the frame 1 and consists of multiple joints and connecting rods, capable of achieving multi-degree-of-freedom movement, so that the welding head 7 can flexibly reach any position in three-dimensional space. The mounting plate 6 is arranged at the execution end of the welding robotic arm 5, and its function is to fix the welding head 7 on the robotic arm. The type of the welding head 7 is selected according to the specific welding process, such as common arc welding heads 7, laser welding heads 7 or resistance welding heads 7, etc.

[0035] During welding, the welding robotic arm 5 works in coordination with each joint according to the pre-set program instructions, drives the mounting plate 6 and the welding head 7 to move in three-dimensional space, makes the welding head 7 accurately move to the welding position. The welding robotic arm 5 can adapt to the complex shape and structure of the rear wheel hub cover, improving the versatility and applicability of the welding device.

[0036] In some examples, such as Figures 7 to 9 shown, two shields 8 are movably arranged on the mounting plate 6, and these two shields 8 are respectively located on both sides of the welding head 7. In the initial state, the two shields 8 jointly surround the welding head 7, and the bottoms of the shields 8 are in contact with each other to form a closed bottom structure. It can protect the welding head 7 when the welding head 7 is not working or approaching the welding area. Two arc-shaped guide rails 9 are arranged on the mounting plate 6, and guide wheels 10 are rotatably arranged on the shields 8, and the guide wheels 10 can roll in the guide rails 9. The guide wheels 10 enable the shields 8 to move along the arc-shaped track of the guide rails 9.

[0037] When the welding robot arm 5 drives the welding head 7 close to the welding area of the base part 18, the shields 8 on both sides of the welding head 7 first come into contact with the surface of the base part 18. As the welding robot arm 5 continues to drive the welding head 7 closer, the shields 8 are subjected to an upward extrusion force from the surface of the base part 18. Since the guide wheels 10 on the shields 8 are located within the arc-shaped guide rails 9 of the mounting plate 6, under the action of the extrusion force, the guide wheels 10 begin to roll within the guide rails 9, thereby driving the shields 8 to move towards both sides along the arc-shaped trajectory of the guide rails 9. During the process of the shields 8 moving towards both sides, the originally mutually abutting bottoms gradually open, and the welding head 7 gradually protrudes. When the shields 8 move to a certain position, the welding head 7 contacts the welding position of the base part 18, and at this time, the welding operation begins. Throughout the welding process, the shields 8 always surround the welding head 7, effectively blocking the welding slag splashes generated during the welding process, thereby protecting the safety of the surrounding working environment.

[0038] The shields 8 surround the welding head 7 during the welding process, which can confine the welding slag generated by welding within the shields 8, preventing the welding slag from splashing into the surrounding environment. Through the cooperation of the guide wheels 10 and the guide rails 9, the shields 8 can automatically open when the welding head 7 approaches the base part 18 without manual intervention. This automated opening and closing method not only improves work efficiency but also ensures that the shields 8 are always in the correct protective position during the welding process.

[0039] In some examples, as Figure 9 shown, the bottom of the shield 8 is designed with a mounting groove 801, which is a long strip-shaped groove. The cleaning cloth strip 802 is detachably arranged within the mounting groove 801, and its bottom protrudes from the mounting groove 801 so as to contact the surface of the base part 18 for wiping, and can remove impurities such as oil stains and dust on the surface of the base part 18. The cleaning cloth strip 802 can be taken out from the mounting groove 801, which is convenient for replacing a new cleaning cloth strip 802.

[0040] When the welding robot arm 5 drives the welding head 7 to move towards the welding area of the base part 18, the cleaning cloth strip 802 at the bottom of the shield 8 first contacts the surface of the base part 18. As the shield 8 moves towards both sides along the arc-shaped guide rail 9 under the action of the extrusion force on the surface of the base part 18, the cleaning cloth strip 802 also slides on the surface of the base part 18, starting from the center position of the welding area and wiping towards both sides. During this process, the cleaning cloth strip 802 removes impurities such as oil stains and dust on the surface of the base part 18. When the shield 8 moves to a suitable position and the welding head 7 protrudes and starts the welding operation, at this time, the surface of the base part 18 has been wiped by the cleaning cloth strip 802 and has good cleanliness.

[0041] By wiping the surface of the base part 18 before welding, impurities that may affect the welding quality are removed, improving the quality of the welding part of the rear wheel hub cover. The cleaning cloth strip 802 is detachably arranged in the installation groove 801, facilitating the maintenance and replacement of the cleaning cloth strip 802. The operator can replace the cleaning cloth strip 802 during the welding gap or after completing a certain number of welding tasks to ensure the continuity of the cleaning effect, and the replacement does not require complex tools, reducing the maintenance cost and time.

[0042] In some examples, such as Figure 9 As shown, sliding grooves 804 are provided on the opposite sides of the two shields 8, and the sliding grooves 804 extend along the left - right direction of the shield 8. Both ends of the compensation plate 803 cooperate with the sliding grooves 804 on the two shields 8 respectively. After the shields 8 are opened, the compensation plate 803 can cover the gap between the two shields 8.

[0043] Before the welding head 7 approaches the welding area of the base part 18, the two shields 8 are in a closed state, and the compensation plate 803 is hidden in the sliding grooves 804 of the two shields 8. When the welding robot arm 5 drives the welding head 7 to continue approaching, the shields 8 are subjected to the extrusion force from the surface of the base part 18 and open to both sides along the arc - shaped guide rail 9. As the shields 8 move, the compensation plate 803 gradually slides out in the sliding grooves 804, filling the gap generated by the opening between the two shields 8, so that the area between the two shields 8 always remains in a closed state. During the entire welding process, the compensation plate 803 and the shields 8 work together to effectively block the spatter of welding slag, ensuring comprehensive protection of the environment around the welding area.

[0044] In some examples, such as Figures 7 to 9 As shown, guide rings 11 are provided on the shields 8, and guide rods 12 pass through the two guide rings 11. The guide rings 11 are sleeved on the guide rods 12. A spring 13 is connected between the mounting plate 6 and the shield 8, and its function is to provide a force for the shield 8 to move downward along the guide rail 9, so that the two shields 8 can automatically close when moving away from the base part 18.

[0045] During the welding process, when the welding robot arm 5 drives the welding head 7 to approach the base part 18, the shields 8 are subjected to the extrusion force from the surface of the base part 18 and start to open to both sides along the guide rail 9. At this time, the spring 13 is compressed. During this process, the guide rings 11 on the shields 8 slide synchronously on the guide rods 12. The guide rods 12 and the guide rings 11 jointly provide precise guidance for the movement of the shields 8, enabling the shields 8 to move smoothly. When the welding is completed and the welding head 7 moves away from the base part 18, the elastic potential energy of the spring 13 is released, pushing the shields 8 to move downward along the guide rail 9, so that the two shields 8 are closed again and restored to the initial state.

[0046] In some examples, such as Figures 7 to 9As shown in the figure, when maintenance and repair of the welding head 7 are required, the shield 8 will hinder the operation. Therefore, a pin hole 14 is provided at the top of the shield 8, and a slidable retaining pin 15 is provided on the mounting plate 6.

[0047] When maintenance and repair of the welding head 7 are required, the operator first manually spreads the shield 8 to both sides to make the shield 8 in an open state. At this time, the positions of the pin hole 14 and the retaining pin 15 correspond to each other. The operator slides the retaining pin 15 to insert the retaining pin 15 into the pin hole 14 to form a mechanical locking structure, so that the shield 8 is kept in an open state, providing sufficient operating space for the maintenance and repair of the welding head 7. When the maintenance and repair work is completed, the operator slides the retaining pin 15 in the reverse direction to pull it out of the pin hole 14, and the shield 8 returns to the normal closed state under the action of the spring 13 force, and welding work can continue.

[0048] In addition, this solution can also achieve the function of preventing mis-welding. Refer to Figure 10 , before the improvement, the processing procedure was as follows: First, place the front baffle 17, then place the base part 18, and press the edge of the base part 18 above the front baffle 17, and then start all the base positioning components 4 at the same time to achieve the pressing of the front baffle 17 and the base part 18. However, after long-term work by the operator, there is a risk of error, and the placement order of the front baffle 17 and the base part 18 may be reversed, causing the front baffle 17 to press above the base part 18. Therefore, an anti-error program was designed and realized by the photoelectric sensor 16 installed at the end of the pressure rod 402. Specifically, only when the pressure rod 402 corresponding to the front baffle 17 is pressed down and the photoelectric sensor 16 detects that the front baffle 17 is in place, the other base positioning components 4 are allowed to perform the pressing action, thus ensuring the correct clamping order of the front baffle 17 and the base part 18 and ensuring that the edge of the base part 18 can press above the front baffle 17. The improved procedure is as follows: First, place the front baffle 17 and press it tightly. At this time, the photoelectric sensor 16 detects that the front baffle 17 is in place, and then perform the subsequent operations of placing and pressing the base part 18. If the front baffle 17 is not detected, it is judged that the front baffle 17 is not placed or not pressed tightly, then an alarm will be given, and the other base positioning components 4 cannot operate and subsequent operations cannot be performed.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A control device for welding a rear wheel hub assembly of an automobile, used for welding an accessory (19) to a welding area of ​​a base member (18) to form a rear wheel hub assembly, characterized in that: The invention comprises a frame (1), an electric heating support plate (2) and a welding positioning assembly (3); the electric heating support plate (2) is arranged on the frame (1) and is used to support a base member (18) and preheat a welding area of ​​the base member (18); the shape of the electric heating support plate (2) is configured to match the shape of the bottom surface of the welding area of ​​the base member (18); The welding positioning assembly (3) comprises a welding bracket (301), a swing arm (302) and a pressure head (303); the welding bracket (301) is arranged on the frame (1); the swing arm (302) is swingably arranged on the welding bracket (301); the pressure head (303) is arranged at the end of the swing arm (302) and can follow the swing arm (302) to swing vertically and press the welding area of ​​the accessory (19) to the base member (18); the pressure head (303) is provided with a pressure sensor (304) for detecting the pressure parameter between the pressure head (303) and the accessory (19); the electric heating support plate (2) is electrically connected to a controller; the pressure sensor (304) is electrically connected to the controller; the controller is used to receive the pressure parameter and send a preheating signal to the electric heating support plate (2).

2. The automobile rear wheel hub assembly welding control device according to claim 1 is characterized in that: It also includes a plurality of groups of basic positioning components (4) arranged around the base member (18), the basic positioning components (4) including a basic bracket (401) and a pressure rod (402), the basic bracket (401) being arranged on the frame (1), the basic bracket (401) having a supporting portion (403), the supporting portions (403) of the plurality of basic brackets (401) being used to jointly support the bottom of the outer ring of the base member (18), the pressure rod (402) being swingably arranged on the basic bracket (401), the pressure rod (402) being able to swing vertically to press the top of the outer ring of the base member (18).

3. The automobile rear wheel hub assembly welding control device according to claim 1 is characterized in that: A welding robot arm (5) is arranged next to the frame (1); a mounting plate (6) is arranged at the execution end of the welding robot arm (5); a welding head (7) is arranged on the mounting plate (6); and the welding head (7) can move under the drive of the welding robot arm (5).

4. The automobile rear wheel hub assembly welding control device according to claim 3 is characterized in that: A protective cover (8) is movably provided on the mounting plate (6). The protective covers (8) are two and are respectively located on both sides of the welding head (7). The two protective covers (8) can move towards each other to enclose the outer periphery and the bottom of the welding head (7), or move away from each other and open to allow the welding head (7) to protrude.

5. The automobile rear wheel hub assembly welding control device according to claim 4 is characterized in that: The mounting plate (6) is provided with two symmetrically arranged arc-shaped guide rails (9), and each of the shields (8) is rotatably provided with a guide wheel (10), the guide wheel (10) being located in the guide rail (9), and the guide wheel (10) being used to roll in the guide rail (9); The shield (8) can be brought into contact with the surface of the base member (18) under the drive of the welding head (7), and the guide wheel (10) can roll along the guide rail (9) under the pressure of the base member (18) so that the two shields (8) move away from each other and open.

6. The automobile rear wheel hub assembly welding control device according to claim 5 is characterized in that: The lower edge of the protective cover (8) has a mounting groove (801), and a cleaning cloth strip (802) is detachably arranged in the mounting groove (801). The cleaning cloth strip (802) is used to wipe the surface of the base member (18) when the protective cover (8) is opened.

7. The automobile rear wheel hub assembly welding control device according to claim 5 is characterized in that: A compensation plate (803) is connected between the two shields (8), and opposite sides of the two shields (8) have slide grooves (804) with openings arranged opposite to each other. Both ends of the compensation plate (803) are respectively slidably arranged in the two slide grooves (804). The compensation plate (803) can slide out of the slide groove (804) when the shields (8) are turned away from each other, so as to cooperate with the two shields (8) to be arranged around the outer periphery of the welding head (7).

8. The automobile rear wheel hub assembly welding control device according to claim 5 is characterized in that: The two shields are each provided with a guide ring (11), the two guide rings (11) are coaxially arranged and a guide rod (12) is provided through the two guide rings (11), and the guide ring (11) can move backwards following the shield (8) and slide in cooperation with the guide rod (12).

9. The automobile rear wheel hub assembly welding control device according to claim 5, characterized in that: A spring (13) is connected between the mounting plate (6) and the shield (8), and the spring (13) is used to provide a force for the shield (8) to move downward along the guide rail (9) so as to close the two shields (8).

10. The automobile rear wheel hub assembly welding control device according to claim 5, characterized in that: The shield (8) has a pin hole (14), and a stop pin (15) is slidably provided on the mounting plate (6). The stop pin (15) is used to be inserted into the pin hole (14) after the shield (8) is moved upward and opened, so as to keep the shield (8) in an open state.

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