Pressing wheel device of friction stir welding machine tool, control method and system

Abstract

The invention relates to the technical field of friction stir welding, and particularly provides a pinch roller device of a friction stir welding machine tool and a control method and system.The pinch roller device comprises a guide rail assembly, a damping assembly, a pinch roller, a push rod, a push rod controller and a battery pack; the guide rail assembly is connected with a machine head of the friction stir welding machine tool and the damping assembly, and the guide rail assembly drives the damping assembly to move; the damping assembly is provided with a roller bearing of the pressing wheel; the first end of the push rod is connected with the guide rail assembly; the battery pack is connected with the push rod controller, the push rod controller is used for wirelessly controlling the push rod, and the battery pack is used for supplying power to the push rod and the push rod controller. The problems that in the prior art, a pipeline of a pressing wheel is prone to winding, and the equipment operation requirement is high are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of friction stir welding, and in particular to a pressure wheel device, a control method and a system for a friction stir welding machine. Background Art

[0002] Friction stir welding (FSW) uses the heat generated by the friction between a high-speed rotating welding tool and the workpiece to partially melt the material being welded. As the welding tool moves forward along the welding interface, the plasticized material flows from the front to the back of the welding tool under the action of the rotating friction force of the welding tool, and forms a dense solid phase weld under the extrusion of the welding tool.

[0003] Existing friction stir welding machines use pneumatic pressure rollers to hold the workpiece in place, preventing warping on either side of the weld and improving weld quality. However, these pneumatic pressure rollers require pipelines and an air supply. These pipelines are prone to tangling and, in severe cases, even breaking when the machine head rotates. Furthermore, these pneumatic pressure rollers require auxiliary equipment to connect to the air supply, placing high demands on the machine's operation.

[0004] With regard to the problems in related technologies such as the pipeline being easily entangled in the compression wheel and the high requirements for equipment operation, no effective solution has yet been proposed. Summary of the Invention

[0005] The embodiments of the present invention provide a pressure wheel device, a control method and a system for a stir friction welding machine, which at least solve the problems in the related art of easy entanglement of the pipeline of the pressure wheel and high requirements for equipment operation.

[0006] An embodiment of the present invention provides a pressure wheel device for a stir friction welding machine, comprising a guide rail assembly 9, a shock absorbing assembly 10, a pressure wheel, a push rod 8, a push rod controller 1 and a battery pack 4; the guide rail assembly 9 is connected to the head of the stir friction welding machine, and the shock absorbing assembly 10, wherein the guide rail assembly 9 drives the shock absorbing assembly 10 to move; the shock absorbing assembly 10 is equipped with a roller bearing 34 for the pressure wheel; the first end of the push rod 8 is connected to the guide rail assembly 9, and the second end of the push rod 8 is connected to the battery pack 4; the battery pack 4 is connected to the push rod controller 1, wherein the push rod controller 1 is used to wirelessly control the push rod 8, and the battery pack 4 is used to supply power to the push rod 8 and the push rod controller 1.

[0007] The embodiment of the present invention provides a pressure wheel device for a stir friction welding machine, wherein the shock absorbing assembly 10 includes a first bracket 27, a second bracket 26, a guide shaft 30, and a spring 28; the first bracket 27 is connected to the guide rail assembly 9; a roller bearing 34 of the pressure wheel is installed at the slot structure of the second bracket 26; a plurality of blind holes are evenly provided on the cantilever structure of the first bracket 27, and a plurality of through holes are provided on the cantilever structure of the second bracket 26, wherein the blind holes correspond to the through holes one by one, and the diameter of the blind holes is larger than the diameter of the through holes; a guide shaft 30 is provided between the corresponding blind holes and the through holes; a spring 28 is sleeved on each guide shaft 30, wherein the spring 28 is inserted into the corresponding blind hole.

[0008] The embodiment of the present invention provides a pressure wheel device for a stir friction welding machine, and the shock absorbing assembly 10 also includes an oil-free bushing 33, a nut 31 and a flat washer 32; the first end of the guide shaft 30 is arranged at a fixed structure at the bottom of the corresponding blind hole, wherein the first end of the guide shaft 30 is provided with a thread, and the bottom of the blind hole is provided with a coaxial threaded through hole; the middle part of the guide shaft 30 is mounted in the corresponding through hole through the oil-free bushing 33, wherein the oil-free bushing 33 abuts against the spring 28; the other end of the guide shaft 30 is pressed and mounted on the end of the corresponding through hole away from the first bracket 27 through the nut 31 and the flat washer 32.

[0009] The embodiment of the present invention provides a pressure wheel device for a stir friction welding machine, and the shock absorbing assembly 10 also includes a roller bearing pin 24 and a shaft elastic retaining ring 25; the roller bearing 34 is installed in the slot structure of the second bracket 26 through the roller bearing pin 24 and the shaft elastic retaining ring 25.

[0010] The pressure wheel device of the stir friction welding machine provided by the embodiment of the present invention is provided with two push rods 8, and the guide rail assembly 9 includes a slider adapter plate 17, a guide rail slider, a linear guide rail 19, a guide rail fixing plate 20, and a piston rod seat 22; the slider adapter plate 17 is connected to the shock absorber assembly 10, and the slider adapter plate 17 is arranged on the guide rail slider; the guide rail slider is installed on the linear guide rail 19; the linear guide rail 19 is arranged on the first side of the guide rail fixing plate 20; the two piston rod seats 22 are respectively arranged at the two ends of the second side of the guide rail fixing plate 20, wherein the piston rod seat 22 is connected to the first end of the corresponding push rod 8; the guide rail fixing plate 20 is connected to the machine head.

[0011] The pressure wheel device of the stir friction welding machine provided by the embodiment of the present invention, the guide rail assembly 9 also includes a positioning pin 21 and a screw 23; the piston rod seat 22 and the second side of the guide rail fixing plate 20 are positioned by the positioning pin 21 and connected by the screw 23.

[0012] The pressure wheel device of the stir friction welding machine provided by the embodiment of the present invention also includes a push rod fixing plate 6 and a push rod mounting plate; the second end of the push rod 8 is connected to the battery pack 4 through the push rod fixing plate 6; the battery pack 4 is connected to the push rod controller 1 through the push rod fixing plate 6; wherein, the second end of the push rod 8 is provided with a push rod mounting plate, the push rod mounting plate is connected to the push rod fixing plate 6, and the connection accuracy needs to be within a preset accuracy range, and the push rod 8 is equipped with a Hall sensor and a reed switch.

[0013] The present invention provides a control method for a friction stir welding machine tool provided by an embodiment of the invention, comprising: setting welding parameters of a head of the friction stir welding machine tool, and inserting a stirring needle of the head into the weld seam of a workpiece to be welded; adjusting the pressure wheel to a preset height by controlling the push rod 8 so that the pressure wheel presses the weld seam, wherein the pressure wheel device comprises a push rod 8, a pressure wheel, a push rod controller 1, a guide rail assembly 9, a shock absorbing assembly 10, and a battery pack 4, the push rod 8 is wirelessly controlled by the push rod controller 1, the first end of the push rod 8 drives the shock absorbing assembly 10 to move through the guide rail assembly 9, the second end of the push rod 8 is connected to the battery pack 4, the guide rail assembly 9 is connected to the head, the shock absorbing assembly 10 is equipped with a roller bearing 34 of the pressure wheel, and the battery pack 4 is connected to the push rod controller 1 for powering the push rod 8 and the push rod controller 1; controlling the head to weld the workpiece to be welded according to the movement of the weld seam, and driving the pressure wheel to press the welded weld seam; after welding is completed, controlling the pressure wheel to be lifted, and then controlling the head to be lifted.

[0014] The control method of the stir friction welding machine provided by the embodiment of the present invention adjusts the pressure wheel to a preset height by controlling the push rod 8 so that the pressure wheel presses the weld, including: detecting the current height of the push rod 8 by a Hall sensor, wherein the Hall sensor is configured on the push rod 8; determining the target height of the push rod 8 based on the preset height of the pressure wheel; calculating the displacement value of the push rod 8 based on the current height and the target height; and issuing an instruction to the push rod controller 1 to control the push rod 8 to move to the target height according to the above-mentioned displacement value, so that the pressure wheel moves to the preset height to press the weld.

[0015] The present invention provides a control system for a friction stir welding machine tool, which executes any of the above-mentioned control methods.

[0016] The present invention provides a pinch wheel device, control method, and system for a friction stir welding machine. A push rod controller 1 controls the movement of a push rod 8, which in turn drives a guide rail assembly 9, which in turn drives a damping assembly 10. Ultimately, the damping assembly 10 drives the pinch wheel, achieving wireless electric control of the pinch wheel with simple control and high stability. This solves the problems of easy entanglement of the pinch wheel pipeline and high equipment operation requirements in related technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without inventive effort.

[0018] Figure 1 It is a schematic front view of a pressure wheel device of a friction stir welding machine tool in an embodiment of the present invention.

[0019] Figure 2 It is a rear view schematic diagram of a pressure wheel device of a stir friction welding machine tool in an embodiment of the present invention.

[0020] Figure 3 1 is a schematic structural diagram of the guide rail assembly 9 in an embodiment of the present invention.

[0021] Figure 4 1 is a schematic structural diagram of the shock absorbing assembly 10 in an embodiment of the present invention.

[0022] Figure 5 The present invention is a flowchart of a control method for a friction stir welding machine tool in an embodiment of the present invention.

[0023] Figure 6 It is a structural diagram of an electronic device in an embodiment of the present invention.

[0024] Among them, the above-mentioned drawings include the following figure marks: 1—push rod controller; 2—first mounting plate; 3—first fixing plate; 4—battery pack; 5—second mounting plate; 6—push rod fixing plate; 7—screw; 8—push rod; 9—guide rail assembly; 10—shock absorber assembly; 11—screw; 12—screw; 13—screw; 14—screw; 15—screw; 16—screw; 17—slider adapter plate; 18—screw; 19—linear guide; 20—guide rail fixing plate; 21—locating pin; 22—piston rod seat; 23—screw; 24—pin for roller bearing; 25—elastic retaining ring for shaft; 26—second bracket; 27—first bracket; 28—spring; 29—screw; 30—guide shaft; 31—nut; 32—flat washer; 33—oil-free bushing; 34—roller bearing. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in more detail with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0026] Friction stir welding machines in the prior art use pneumatic pressure rollers to hold the workpiece in place, preventing warping on either side of the weld and improving weld quality. However, these pneumatic pressure rollers require pipelines and an air source. These pipelines are prone to tangling and, in severe cases, even breaking when the machine head rotates. Furthermore, these pneumatic pressure rollers require auxiliary equipment to connect to the air source, placing high demands on the machine's operation.

[0027] To this end, the present invention provides a friction stir welding machine tool pressure wheel device, please refer to Figures 1 to 2 As shown, Figure 1 This is the main view diagram. Figure 2 It is a rear view schematic diagram, and the above-mentioned clamping wheel device includes a guide rail assembly 9, a shock absorbing assembly 10, a clamping wheel, a push rod 8, a push rod controller 1 and a battery pack 4.

[0028] Guide rail assembly 9 connects to the head of the friction stir welding machine and to shock absorber assembly 10, wherein guide rail assembly 9 drives shock absorber assembly 10 to move. Shock absorber assembly 10 is mounted with roller bearing 34 for a pressure wheel. A first end of push rod 8 is connected to guide rail assembly 9, and a second end of push rod 8 is connected to battery pack 4. Battery pack 4 is connected to push rod controller 1, wherein push rod controller 1 is used for wireless control of push rod 8, and battery pack 4 is used to power push rod 8 and push rod controller 1.

[0029] It can be understood that the head and the machine body of the stir friction welding machine can be connected by any one of the structures including an integrated structure, a split movable connection structure, a suspended structure, and an articulated connection structure. Those skilled in the art can make a determination based on the specific category of the workpiece to be welded and the actual processing scenario.

[0030] To improve stability and integration, a fixed structure can be used to connect and arrange the guide rail assembly 9, machine head, push rod 8, push rod controller 1, and battery pack 4. For example, a fixed structure using one or more fixing plates and screws, a key connection, or a pin connection can be used. This embodiment preferably uses a fixed structure using multiple fixing plates and screws, which offers the advantages of compactness and ease of installation, and will be described in detail later.

[0031] The guide rail assembly 9 drives the shock absorber assembly 10 to move, including but not limited to: a connecting rod transmission method using a guide rail + slider, a gear transmission method, a belt transmission method using a belt + pulley, or a chain transmission method using a chain + sprocket. This embodiment preferably uses a connecting rod transmission method using a linear guide rail + slider, which has the advantages of good cushioning, strong load-bearing capacity, and high movement accuracy, and will be described in detail later.

[0032] The mechanical structure of the shock-absorbing assembly 10 can be any of the following: a spring-guide shaft structure, a ball-floating assembly structure, or an elastic pressure plate-roller linkage structure. This embodiment preferably employs a spring-guide shaft structure, which has the advantage of adapting to workpiece surface height differences and will be described in detail later.

[0033] It will be appreciated that push rod 8 is an electric push rod capable of performing various actions under the control of push rod controller 1. Examples include linear telescopic motion, closed-loop position control, self-locking, variable speed motion, load adaptation, and overload protection. The configuration of corresponding components within push rod 8 for these actions is determined by those skilled in the art based on practical circumstances. This embodiment will be described using the configuration of a Hall effect sensor and a reed switch within push rod 8 as an example.

[0034] The number of push rods 8 can be one or more. Those skilled in the art can determine the number of push rods 8 according to the size requirements and action requirements of the pinch wheel device. This embodiment is described below by taking the pinch wheel device configured with two push rods 8 as an example.

[0035] The battery pack 4 can be equipped with a power indicator to enable technicians to accurately determine the remaining power of the battery pack 4. The battery pack 4 can also be equipped with an explosion-proof battery box to enhance safety. Furthermore, the battery pack 4 can also be equipped with a battery charger to extend battery life. It is understood that when selecting a specific battery pack and battery charger model, those skilled in the art need to consider the battery pack's operating life and the number of charge and discharge cycles the battery charger can provide. For example, a battery pack capable of 5-7 consecutive working days and a battery charger capable of 600-1000 charge and discharge cycles can be selected.

[0036] The above-mentioned pressure wheel device provided in this embodiment controls the movement of the push rod 8 through the push rod controller 1, the push rod 8 drives the guide rail assembly 9 to move, the guide rail assembly 9 drives the shock absorber assembly 10 to move, and finally the shock absorber assembly 10 drives the pressure wheel to move, thereby realizing wireless electric control of the pressure wheel, and the control is simple and the stability is high, which can solve the problems of easy entanglement of the pipeline of the pressure wheel and high equipment operation requirements in related technologies.

[0037] Preferably, please refer to Figure 3As shown, the shock absorbing assembly 10 includes a first bracket 27 , a second bracket 26 , a guide shaft 30 , and a spring 28 .

[0038] The first bracket 27 is connected to the guide rail assembly 9. The roller bearing 34 for the pressure wheel is mounted in the slot structure of the second bracket 26. The cantilever structure of the first bracket 27 is uniformly provided with multiple blind holes, while the cantilever structure of the second bracket 26 is provided with multiple through holes. The blind holes correspond to the through holes one by one, and the diameter of the blind holes is larger than that of the through holes. A guide shaft 30 is provided between the corresponding blind holes and through holes. Each guide shaft 30 is sleeved with a spring 28, which is inserted into the corresponding blind hole.

[0039] It can be understood that the guide rail assembly 9 drives the shock absorbing assembly 10 to move through the connection with the first bracket 27.

[0040] The roller bearing 34 enables the pressing wheel to rotate along with the workpiece surface during the pressing process, thus adapting to the uneven weld surface.

[0041] For example, eight blind holes with a diameter of 13 mm are evenly formed on the cantilever structure of the first bracket 27 , and correspondingly, eight through holes with a diameter of 10 mm are formed on the cantilever structure of the second bracket 26 .

[0042] Furthermore, in order to ensure more uniform force, the through holes are also evenly opened on the cantilever structure of the second bracket 26 .

[0043] It can be understood that the blind hole on the first bracket 27 is used to compress the spring 28 .

[0044] Figure 3 The guide shaft 30 shown passes through the above-mentioned blind hole and is fixed to the first bracket 27 to form a rigid connection. When the second bracket 26 pushes the spring 28 to be compressed in the direction close to the first bracket 27, the above-mentioned rigid connection can clearly define the linear guide path of the compression of the spring 28 and improve the movement stability.

[0045] The coordination between the second bracket 26, guide shaft 30, spring 28, and first bracket 27 provides flexible pressure when the pressure wheel contacts the workpiece surface, preventing rigid impact. Even when the workpiece surface is uneven, the pressure wheel can adapt to the height difference, demonstrating strong adaptability and improving the quality of friction stir welding.

[0046] In order to enhance the rebound function of the shock absorbing assembly 10, the spring 28 is preferably an overload spring, such as a cylindrical helical compression spring, a conical helical spring, or an air spring, and the spring material is high carbon steel or chrome vanadium steel.

[0047] In order to further enhance the rebound function, the shock absorbing assembly 10 further includes an oil-free bushing 33 , a nut 31 and a flat washer 32 .

[0048] The first end of the guide shaft 30 is fixed to the bottom of the corresponding blind hole. The first end of the guide shaft 30 is threaded, and the bottom of the blind hole is provided with a coaxial threaded through-hole. The middle portion of the guide shaft 30 is mounted in the corresponding through-hole via an oil-free bushing 33, which abuts the spring 28. The other end of the guide shaft 30 is clamped and mounted in the corresponding through-hole, away from the first bracket 27, using a nut 31 and a flat washer 32.

[0049] For example, an M6 coaxial threaded through hole is provided at the bottom of the blind hole, that is, an internal threaded through hole with a diameter of 6 mm and a coaxiality requirement.

[0050] It can be understood that the first end of the guide shaft 30 is rigidly fixed to the first bracket 27 through the cooperation between the thread and the above-mentioned coaxial threaded through hole.

[0051] The oil-free bushing 33 is installed in the through hole in the direction from the first bracket 27 to the second bracket 26 and abuts against the spring 28. The cooperation between the oil-free bushing 33 and the middle part of the guide shaft 30 can improve the stability of the shock absorber assembly 10 in the direction of movement and reduce friction loss.

[0052] The other end of the guide shaft 30 is provided with a thread that matches the nut 31 .

[0053] The initial preload force of the spring 28 can be adjusted by adjusting the tightening degree of the nut 31 , thereby controlling the threshold value of the rebound force to meet the pressing requirements of different workpieces.

[0054] The end of the through hole away from the first bracket 27 can be understood as the bottom of the second bracket 26. The flat washer 32 located between the nut 31 and the bottom of the second bracket 26 can, on the one hand, increase the contact area between the nut 31 and the bottom of the second bracket 26, and protect the surface of the parts by reducing the pressure; on the other hand, it can play a compensatory role, fill the dimensional error and gap between the nut 31 and the bottom of the second bracket 26, and improve the connection stability.

[0055] Preferably, the flat washer 32 is a Class A flat washer with high dimensional accuracy and surface flatness.

[0056] Further, such as Figure 3 As shown, the shock absorbing assembly 10 further includes a roller bearing pin 24 and a shaft circlip 25. The roller bearing 34 is mounted on the slot structure of the second bracket 26 through the roller bearing pin 24 and the shaft circlip 25.

[0057] The shaft elastic circlip 25 is an A-type shaft elastic circlip, which is made of a material with good elasticity and can withstand axial force and deformation within a certain range.

[0058] It can be understood that the roller bearing pin 24 connects the roller bearing 34 to the slot structure of the second bracket 26. On the one hand, it enables the roller bearing 34 to move with the movement of the second bracket 26 and transfers the load borne by the roller bearing 34 to the second bracket 26, thereby improving stability; on the other hand, it prevents the roller bearing 34 from rotating circumferentially relative to the slot structure of the second bracket 26 during operation.

[0059] Installing the shaft elastic circlip 25 can, on the one hand, keep the roller bearing 34 stable in the axial direction to ensure that the roller bearing 34 can withstand axial loads and radial loads; on the other hand, it can reduce the difficulty of installation and maintenance of the roller bearing 34.

[0060] Preferably, the above-mentioned pressing wheel device provided in this embodiment is provided with two push rods 8. Figure 4 As shown, the guide rail assembly 9 includes a slider adapter plate 17 , a guide rail slider, a linear guide rail 19 , a guide rail fixing plate 20 , and a piston rod seat 22 .

[0061] The slider adapter plate 17 is connected to the shock absorber assembly 10 and is mounted on the guide rail slider. The guide rail slider is mounted on the linear guide 19. The linear guide 19 is mounted on the first side of the guide rail fixing plate 20. Two piston rod seats 22 are respectively located at opposite ends of the second side of the guide rail fixing plate 20. The piston rod seats 22 are connected to the first ends of the corresponding push rods 8. The guide rail fixing plate 20 is connected to the machine head.

[0062] It can be understood that the guide rail assembly 9 is connected to the head of the friction stir machine tool through the guide rail fixing plate 20, and the guide rail fixing plate 20 is used as a reference for the guide rail slider to run on the linear guide rail 19.

[0063] The push rod 8 applies a thrust or pull to the piston rod seat 22, which is transmitted to the guide rail slider via the rigid structure of the guide rail fixing plate 20. The guide rail slider moves along the linear guide 19 under force, driving the slider adapter plate 17 along with it. The slider adapter plate 17 is connected to the shock absorber assembly 10, driving the shock absorber assembly 10 along with it, thus achieving wireless electric control of the pressure roller.

[0064] The guide rail slider is provided with a ball or roller structure, which can cooperate with the linear guide rail 19 to offset the torque deviation that may be generated during the movement.

[0065] In addition, the number of the piston rod seats 22 is consistent with the number of the push rods 8 .

[0066] It can be understood that the push rod 8 and piston rod seat 22 serving as the power source, and the linear guide rail 19 and guide rail slider serving as the actuator are respectively arranged on both sides of the guide rail fixing plate 20, which can avoid interference between the power source and the actuator and simplify the structural layout.

[0067] Further, such as Figure 4 As shown, the guide rail assembly 9 further includes a locating pin 21 and a screw 23. The piston rod seat 22 and the second side of the guide rail fixing plate 20 are fixed by the locating pin 21 and connected by the screw 23.

[0068] A positioning pin 21 is used between the piston rod seat 22 and the second side of the guide rail fixing plate 20. On the one hand, it is easy to determine the installation position and improve the assembly accuracy; on the other hand, it can share the load and prevent the structure from loosening due to multiple movements of the piston rod seat 22.

[0069] Preferably, Figure 1 As shown, the above-mentioned pressing wheel device provided in this embodiment further includes a push rod fixing plate 6 and a push rod mounting plate.

[0070] The second end of push rod 8 is connected to battery pack 4 via push rod fixing plate 6. Battery pack 4 is also connected to push rod controller 1 via push rod fixing plate 6. The second end of push rod 8 is provided with the aforementioned push rod mounting plate, which is connected to push rod fixing plate 6 with a connection accuracy within a preset range. Push rod 8 is also equipped with a Hall effect sensor and a reed switch.

[0071] It is understood that the Hall sensor obtains the height information of the push rod 8 by detecting the change in the magnetic field of the magnet inside the push rod 8. Based on the height information received, the controller of the friction stir welding machine can, on the one hand, compare the received height information with the target height of the push rod 8, dynamically adjust the movement of the push rod 8, and ensure precise positioning through closed-loop control; on the other hand, it can control the push rod 8 to self-lock at any height within the movement range, adapting to different clamping positions without having to adjust the height of the machine head. Among them, the controller of the friction stir welding machine controls the push rod 8 through the push rod controller 1. That is, the controller of the friction stir welding machine sends instructions to the push rod controller 1, and the push rod controller 1 controls the movement of the push rod 8.

[0072] In addition, the push rod controller 1 can also receive instructions from a corresponding remote control, which is directly controlled by a technician. If the automatic control fails to tighten the weld, the technician issues instructions through the remote control to adjust the height of the pressure wheel based on the push rod controller 1, push rod 8, guide rail assembly 9, and shock absorber assembly 10 to ensure welding quality.

[0073] Installing a reed switch at a preset position on the push rod 8 provides hard protection and ensures system safety. For example, a reed switch can be installed at the push rod 8's maximum movement limit. When the push rod 8 reaches this limit, a magnet triggers the reed switch to close, sending a signal to the controller to immediately stop the push rod 8's movement, preventing mechanical overload or motor stall. The limit position mentioned above refers to the push rod 8's maximum extension or maximum retraction position.

[0074] By ensuring that the connection accuracy between the push rod mounting plate and the push rod fixing plate 6 is within a preset accuracy range, that is, the push rod mounting plate and the push rod fixing plate 6 are precisely connected, the position detection accuracy can be improved, thereby improving the control accuracy.

[0075] For example, the connection accuracy mentioned above refers to parallelism and flatness, and the preset accuracy range is that the parallelism error between the push rod mounting plate and the push rod fixing plate 6 is within ±0.05 mm / m, and the flatness error is ≤0.02 mm. Obviously, the specific indicators of connection accuracy and the specific values ​​of the preset accuracy range can be determined by those skilled in the art based on a priori values ​​and the actual welding requirements of the workpiece.

[0076] For example, Figures 1 to 4 As shown, this embodiment is based on a fixing structure of multiple fixing plates + screws to specifically connect the various components of the above-mentioned pressure wheel device. Among them, the above-mentioned fixing plates include a first fixing plate 3, a push rod fixing plate 6 and a guide rail fixing plate 20.

[0077] The first surface of the first fixing plate 3 is provided with a plurality of countersunk through holes, such as Figure 1 Six are shown. The first side of the first fixing plate 3 is connected to the head of the friction stir welding machine via screws 12 installed in countersunk through-holes. The first side of the second side of the first fixing plate 3 is connected to the guide rail fixing plate 20 of the guide rail assembly 9 via screws 14. The second side of the second side of the first fixing plate 3 is connected to the push rod fixing plate 6 via screws 13.

[0078] A first mounting plate 2 is provided on the first side of the push rod fixing plate 6, and a second mounting plate 5 is provided on the second side of the push rod fixing plate 6. The push rod controller 1 is connected to the push rod fixing plate 6 via the first mounting plate 2, and the battery pack 4 is connected to the push rod fixing plate 6 via the second mounting plate. The push rod fixing plate 6 is secured to both the first mounting plate 2 and the second mounting plate 5 via screws 11. The push rod fixing plate 6 is connected to the second end of the push rod 8 via screws 7.

[0079] The first side of the guide rail fixing plate 20 is fixed to the linear guide rail 19 by screws 18. Both ends of the second side of the guide rail fixing plate 20 are connected to the piston rod seat 22 by screws 23 and positioned by locating pins 21. The piston rod seat 22 is connected to the first end of the push rod 8 by screws 15. The guide rail slider is installed on the linear guide rail 19, and the slider adapter block 17 is fixed to the guide rail slider by screws 16. The slider adapter block 17 is connected to the first bracket 27 by screws 29. The specific connection relationship between the first bracket 27 and the second bracket 26, and between the shock absorber assembly 10 and the pressure wheel has been given and will not be repeated.

[0080] For example, this embodiment also provides parameter configurations for the push rod 8 and battery pack 4. Specifically, the push rod 8 has a maximum power of 30W, a stroke of 0-50mm, an operating speed of 35mm / s, and a load of 1000N per push rod 8. The battery pack 4 is a 12V, 44800mAh battery pack capable of five consecutive working days. It measures 82mm x 47.2mm x 160mm in length, width, and height, and is equipped with a battery charger capable of 600-1000 charge and discharge cycles.

[0081] Please refer to Figure 5 As shown, the present invention also provides a control method for a friction stir welding machine, comprising: step S501, setting the welding parameters of the head of the friction stir welding machine, and inserting the stirring needle of the head into the weld of the workpiece to be welded.

[0082] Step S502, adjust the pressure wheel to a preset height by controlling the push rod 8 so that the pressure wheel presses the weld, wherein the pressure wheel device includes a push rod 8, a pressure wheel, a push rod controller 1, a guide rail assembly 9, a shock absorbing assembly 10, and a battery pack 4. The push rod 8 is wirelessly controlled by the push rod controller 1, and the first end of the push rod 8 drives the shock absorbing assembly 10 to move through the guide rail assembly 9. The second end of the push rod 8 is connected to the battery pack 4, the guide rail assembly 9 is connected to the machine head, the shock absorbing assembly 10 is installed with a roller bearing 34 of the pressure wheel, and the battery pack 4 is connected to the push rod controller 1 for supplying power to the push rod 8 and the push rod controller 1.

[0083] Step S503: Control the machine head to move along the weld seam to weld the workpiece, and drive the clamping wheel to clamp the welded weld seam.

[0084] Step S504: After welding is completed, the pinch wheel is controlled to be lifted, and then the machine head is controlled to be lifted.

[0085] The above-mentioned control method provided in this embodiment controls the movement of the push rod 8 through the push rod controller 1, the push rod 8 drives the guide rail assembly 9 to move, the guide rail assembly 9 drives the shock absorber assembly 10 to move, and finally the shock absorber assembly 10 drives the pressure wheel to move, thereby realizing wireless electric control of the pressure wheel, and the control is simple and the stability is high, which can solve the problems of easy entanglement of the pipeline of the pressure wheel and high equipment operation requirements in related technologies.

[0086] Preferably, step S502, adjusting the pressure wheel to a preset height by controlling the push rod 8 so that the pressure wheel presses the weld, includes: detecting the current height of the push rod 8 by a Hall sensor, wherein the Hall sensor is configured on the push rod 8. Determining a target height of the push rod 8 based on the preset height of the pressure wheel. Calculating a displacement value of the push rod 8 based on the current height and the target height. Sending an instruction to the push rod controller 1 to control the push rod 8 to move to the target height according to the displacement value, so that the pressure wheel moves to the preset height to press the weld.

[0087] The controller used in the preferred method can be integrated into the same equipment control system with the head controller of the friction stir welding machine, or can be set separately. By automatically controlling push rod 8, control efficiency can be improved, shortening the setup time before welding.

[0088] Alternatively, a technician can use a remote control to issue instructions to the push rod controller 1, and adjust the height of the pressure wheel based on the push rod 8, guide rail assembly 9, and shock absorber assembly 10 until the weld to be welded is pressed. In this case, the specific displacement value of the push rod 8 needs to be determined by the technician based on a priori values ​​and actual conditions.

[0089] An embodiment of the present invention further provides a control system for a friction stir welding machine tool, wherein the control system is used to execute any of the above control methods.

[0090] The present invention also provides a non-transitory machine-readable medium storing a computer program, wherein the computer program, when executed by a processor of a computer, is used to cause the computer to perform the method of the present invention.

[0091] The present invention also provides a computer program product including a computer program, wherein the computer program, when executed by a processor of a computer, is used to cause the computer to execute the method of the present invention.

[0092] The present invention also provides an electronic device including at least one processor and a memory communicatively connected to the at least one processor. The memory stores a computer program executable by the at least one processor, wherein the computer program, when executed by the at least one processor, causes the electronic device to perform the method of the present invention.

[0093] refer to Figure 6, a structural block diagram of an electronic device that can be used as a server or client of an embodiment of the present invention will now be described, which is an example of a hardware device that can be applied to various aspects of the present invention. The electronic device is intended to represent various forms of digital electronic computer devices, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0094] like Figure 6 As shown, the electronic device includes a computing unit 601, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 602 or a computer program loaded from a storage unit 608 into a random access memory (RAM) 603. RAM 603 can also store various programs and data required for the operation of the electronic device. The computing unit 601, ROM 602, and RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0095] Multiple components within the electronic device are connected to the I / O interface 605, including an input unit 606, an output unit 607, a storage unit 608, and a communication unit 609. The input unit 606 can be any type of device capable of inputting information into the electronic device. The input unit 606 can receive input digital or character information and generate key signal inputs related to user settings and / or function control of the electronic device. The output unit 607 can be any type of device capable of presenting information and may include, but is not limited to, a display, a speaker, a video / audio output terminal, a vibrator, and / or a printer. The storage unit 608 may include, but is not limited to, a magnetic disk or an optical disk. The communication unit 609 allows the electronic device to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks and may include, but is not limited to, a modem, a network card, an infrared communication device, and / or a wireless communication transceiver, such as a Bluetooth device, a WiFi device, a WiMax device, a cellular communication device, and / or the like.

[0096] The computing unit 601 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the computing unit 601 include, but are not limited to, a CPU, a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing units, various computing units that run machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 601 performs the various methods and processes described above. For example, in some embodiments, the method embodiments of the present invention may be implemented as a computer program tangibly embodied in a machine-readable medium, such as a storage unit 608. In some embodiments, part or all of the computer program may be loaded and / or installed onto the electronic device via the ROM 602 and / or the communication unit 609. In some embodiments, the computing unit 601 may be configured to perform the above-described methods by any other suitable means (e.g., via firmware).

[0097] The computer programs for implementing the methods of the embodiments of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor or controller, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0098] In the context of the present invention, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable signal medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, or infrared system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fibers, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0099] It should be noted that the term "including" and its variations used in the embodiments of the present invention are open inclusions, that is, "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The modifications of "one" and "multiple" mentioned in the embodiments of the present invention are illustrative and not restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more". The descriptions of the terms "first", "second", etc. are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0100] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the embodiments of the present invention are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions, and corresponding operation entrances shall be provided for users to choose to authorize or refuse.

[0101] The various steps described in the method implementation methods provided by the embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method implementation methods may include additional steps and / or omit the steps shown. The scope of protection of the present invention is not limited in this respect.

[0102] The term "embodiment" in this specification refers to specific features, structures or characteristics described in conjunction with the embodiment that can be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. The various embodiments in this specification are described in a related manner, and the same or similar parts between the various embodiments are referenced to each other. In particular, for the device, equipment, and system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts refer to the partial description of the method embodiment.

[0103] The above-described embodiments merely represent several implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection. It should be noted that a person of ordinary skill in the art would be able to make various modifications and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A pressure wheel device for a friction stir welding machine, characterized in that: It includes a guide rail assembly (9), a shock absorbing assembly (10), a pinch wheel, a push rod (8), a push rod controller (1) and a battery pack (4); The guide rail assembly (9) is connected to the head of the friction stir welding machine and the shock absorbing assembly (10), wherein the guide rail assembly (9) drives the shock absorbing assembly (10) to move; The shock absorbing assembly (10) is equipped with a roller bearing (34) of the pressure wheel; The first end of the push rod (8) is connected to the guide rail assembly (9), and the second end of the push rod (8) is connected to the battery pack (4); The battery pack (4) is connected to the push rod controller (1), wherein the push rod controller (1) is used to wirelessly control the push rod (8), and the battery pack (4) is used to supply power to the push rod (8) and the push rod controller (1).

2. The pressure wheel device according to claim 1, characterized in that: The shock absorbing assembly (10) includes a first bracket (27), a second bracket (26), a guide shaft (30), and a spring (28); The first bracket (27) is connected to the guide rail assembly (9); The roller bearing (34) of the pressing wheel is installed at the slot structure of the second bracket (26); A plurality of blind holes are evenly formed on the cantilever structure of the first bracket (27), and a plurality of through holes are formed on the cantilever structure of the second bracket (26), wherein the blind holes correspond to the through holes one by one, and the diameter of the blind holes is larger than the diameter of the through holes; The guide shaft (30) is provided between the corresponding blind hole and the through hole; The spring (28) is sleeved on each guide shaft (30), wherein the spring (28) penetrates into the corresponding blind hole.

3. The pressure wheel device according to claim 2, characterized in that: The shock absorbing assembly (10) further includes an oil-free bushing (33), a nut (31) and a flat washer (32); The first end of the guide shaft (30) is arranged on a fixed structure at the bottom of the corresponding blind hole, wherein the first end of the guide shaft (30) is provided with a thread, and the bottom of the blind hole is provided with a coaxial threaded through hole; The middle portion of the guide shaft (30) is mounted in the corresponding through hole through the oil-free bushing (33), wherein the oil-free bushing (33) abuts against the spring (28); The other end of the guide shaft (30) is pressed and mounted on the end of the corresponding through hole away from the first bracket (27) through the nut (31) and the flat washer (32).

4. The pressure wheel device according to claim 2, characterized in that: The shock absorbing assembly (10) further comprises a roller bearing pin (24) and a shaft elastic retaining ring (25); The roller bearing (34) is mounted on the slot structure of the second bracket (26) via the roller bearing pin (24) and the shaft elastic retaining ring (25).

5. The pressure wheel device according to claim 1, characterized in that: Two push rods (8) are provided, and the guide rail assembly (9) includes a slider adapter plate (17), a guide rail slider, a linear guide rail (19), a guide rail fixing plate (20), and a piston rod seat (22); The slider adapter plate (17) is connected to the shock absorbing assembly (10), and the slider adapter plate (17) is arranged on the guide rail slider; The guide rail slider is mounted on the linear guide rail (19); The linear guide rail (19) is arranged on a first side of the guide rail fixing plate (20); The two piston rod seats (22) are respectively arranged at two ends of the second side of the guide rail fixing plate (20), wherein the piston rod seats (22) are connected to the first ends of the corresponding push rods (8); The guide rail fixing plate (20) is connected to the machine head.

6. The pressure wheel device according to claim 5, characterized in that: The guide rail assembly (9) further includes a positioning pin (21) and a screw (23); The piston rod seat (22) and the second side of the guide rail fixing plate (20) are positioned by the positioning pin (21) and connected by the screw (23).

7. The pressure wheel device according to claim 1, characterized in that: Also included is a push rod fixing plate (6) and a push rod mounting plate; The second end of the push rod (8) is connected to the battery pack (4) via the push rod fixing plate (6); The battery pack (4) is connected to the push rod controller (1) via the push rod fixing plate (6); The second end of the push rod (8) is provided with the push rod mounting plate, the push rod mounting plate is connected to the push rod fixing plate (6), and the connection accuracy needs to be within a preset accuracy range, and the push rod (8) is equipped with a Hall sensor and a reed switch.

8. A control method for a friction stir welding machine tool, characterized in that: include: Setting the welding parameters of the head of the friction stir welding machine tool and inserting the stirring needle of the head into the weld seam of the workpiece to be welded; The pressing wheel is adjusted to a preset height by controlling the push rod (8) so that the pressing wheel presses the weld, wherein the pressing wheel device comprises the push rod (8), the pressing wheel, a push rod controller (1), a guide rail assembly (9), a shock absorbing assembly (10), and a battery pack (4); the push rod (8) is wirelessly controlled by the push rod controller (1); the first end of the push rod (8) drives the shock absorbing assembly (10) to move through the guide rail assembly (9); the second end of the push rod (8) is connected to the battery pack (4); the guide rail assembly (9) is connected to the machine head; the shock absorbing assembly (10) is installed with a roller bearing (34) of the pressing wheel; and the battery pack (4) is connected to the push rod controller (1) for supplying power to the push rod (8) and the push rod controller (1); Controlling the machine head to move along the weld seam to weld the workpiece to be welded, and driving the pressing wheel to press the welded weld seam; After welding is completed, the pinch wheel is controlled to lift up, and then the machine head is controlled to lift up.

9. The control method according to claim 8, characterized in that: The pressing wheel is adjusted to a preset height by controlling a push rod (8) so that the pressing wheel presses the weld, comprising: detecting the current height of the push rod (8) by a Hall sensor, wherein the Hall sensor is configured on the push rod (8); Determining a target height of the push rod (8) based on a preset height of the pressing wheel; Calculating a displacement value of the push rod (8) based on the current height and the target height; An instruction is issued to the push rod controller (1) to control the push rod (8) to move to the target height according to the displacement value, so that the pressing wheel moves to the preset height to press the weld.

10. A control system for a friction stir welding machine tool, characterized in that: The control system executes the control method according to any one of claims 8 to 9.

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