An automatic fan blade welding machine and method of use thereof

Abstract

The present application relates to the technical field of welding, in particular to a fan blade automatic welding machine and its using method, which comprises a workbench, a rotating column, two base clamping assemblies, a driving assembly, a blade clamping and conveying assembly and a lifting contact assembly; two base clamping assemblies are arranged, and the rotating column reciprocates within a range of 180 degrees to switch the two base clamping assemblies between the welding station and the feeding and discharging station alternately, so that the welding and feeding and discharging are synchronized, the waiting time is greatly reduced, and the production rhythm is improved. The rotating column adopts 180-degree reciprocating rotation instead of continuous circumferential rotation, which avoids the problem of wire winding; the inclined arrangement of the base clamping assembly makes the base assume an inclined posture, and the required installation inclination angle is naturally formed after the welding of the horizontally clamped blade; thus, the problem of loose working rhythm and low production efficiency in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to an automatic fan blade welding machine and its usage method. Background Technology

[0002] In the fan manufacturing process, multiple metal fan blades are often fixed to the periphery of a rotating base by spot welding to form a fan blade assembly. Spot welding utilizes the resistance heat generated when a large current passes through the contact surface to achieve localized melting and connection between the fan blade root and the base under pressure, which is characterized by high efficiency and minimal deformation.

[0003] In existing technologies, a rotating base is typically clamped onto a dedicated fixture at the welding station, and each fan blade is sequentially fed to the side of the base for spot welding by manual labor or a robotic arm. This fixture serves both to index and position the base and to withstand the welding pressure. Since the entire welding process, including base loading, sequential welding of multiple fan blades, and post-weld unloading, is completed at the same station, the fixture is continuously occupied during the welding process.

[0004] This method results in an insufficiently tight work cycle. Before all the fan blades of one base can be welded, the next base cannot be loaded. The work cycle cannot begin until the finished product is removed, making it difficult to meet the efficiency requirements of large-scale continuous production. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic fan blade welding machine and its usage method, aiming to solve the problems of non-compact working cycle and low production efficiency in the prior art.

[0006] To achieve the above objectives, the present invention provides an automatic fan blade welding machine, comprising a worktable, a rotating column, two base clamping assemblies, a drive assembly, a fan blade clamping and conveying assembly, and a lifting contact assembly; The rotating column is rotatably mounted on the worktable; two base clamping assemblies are respectively mounted on the rotating column; the base clamping assemblies are used to clamp and fix the base from the inner hole of the base and drive the base to rotate around its own axis; the driving assembly is located at the bottom of the worktable and is used to drive the rotating column to rotate; the fan blade clamping and conveying assembly is located on the worktable; the lifting contact assembly is located on the worktable; the fan blade clamping and conveying assembly is used to clamp the fan blade to be welded and convey it to the side of the base, and serves as the first electrode during welding; the lifting contact assembly is used to contact the base during descent and serves as the second electrode during welding; the first electrode and the second electrode are respectively electrically connected to the two output terminals of the welding power supply.

[0007] The base clamping assembly includes a bracket, a rotating cylinder, a drive mechanism, four sliders, four abutments, and an adjustment mechanism. The bracket is fixedly mounted on the rotating column; the rotating cylinder is rotatably mounted on the bracket; the driving mechanism is located on the side of the rotating cylinder and is used to drive the rotating cylinder to rotate; the four sliders are slidably mounted inside the rotating cylinder; each slider is fixedly mounted with a stop post, the stop post penetrating the rotating cylinder; the adjusting mechanism is located on the rotating cylinder and is used to drive the four sliders to synchronously converge inward or separate outward along the radial direction.

[0008] The drive mechanism includes a first servo motor, a first gear, and a first gear ring; The first servo motor is fixedly mounted on the bracket; the first gear is fixedly mounted on the output end of the first servo motor; the first gear ring is fixedly mounted on the rotating cylinder and meshes with the first gear.

[0009] The adjusting mechanism includes four lead screws, four driven bevel gears, an adjusting shaft, and a driving bevel gear. The four lead screws are rotatably disposed inside the rotating cylinder and are threadedly connected to the four sliders respectively; a driven bevel gear is fixedly disposed at the end of each lead screw; the adjusting shaft is rotatably disposed on the rotating cylinder and passes through the rotating cylinder; the driving bevel gear is fixedly disposed at one end of the adjusting shaft and meshes with the four driven bevel gears.

[0010] The drive assembly includes a second servo motor, a second gear, and a second gear ring; The second servo motor is fixedly mounted on the bottom of the worktable; the second gear is fixedly mounted on the output end of the second servo motor; the second gear ring is fixedly mounted on the rotating column and meshes with the second gear.

[0011] The fan blade clamping and conveying assembly includes two guide rails, a sliding seat, a first hydraulic cylinder, two first guide rods, a top clamping block, a second hydraulic cylinder, and a bottom clamping block. Two guide rails are fixedly mounted on the top of the worktable; a sliding seat is slidably mounted on the two guide rails; a first hydraulic cylinder is fixedly mounted on the top of the worktable, and its output end is fixedly connected to the sliding seat; two first guide rods are slidably mounted on the sliding seat, and a top clamping block is fixedly mounted on the bottom end of the two first guide rods; a second hydraulic cylinder is fixedly mounted on the sliding seat, and its output end is fixedly connected to the top clamping block; a bottom clamping block is fixedly mounted on the sliding seat and located directly below the top clamping block; the bottom clamping block is connected to one of the output ends of the welding power source via a wire.

[0012] The lifting contact assembly includes a support plate, two second guide rods, a contact block, and a servo electric cylinder. The support plate is fixedly mounted on the top of the workbench; the two second guide rods are slidably mounted on the support plate; the contact block is fixedly mounted on one end of the two second guide rods; the servo electric cylinder is fixedly mounted on the support plate, and the output end of the servo electric cylinder is fixedly connected to the contact block; the contact block is connected to the other output end of the welding power supply through a wire.

[0013] The automatic fan blade welding machine also includes a locking component; The locking component is located below the workbench and is used to lock the rotating column after it rotates.

[0014] The locking assembly includes a mounting base, a locking lever, a third hydraulic cylinder, and two limit switches. The rotating column is symmetrically provided with two radial locking holes; the mounting base is fixedly provided at the bottom of the workbench; the locking rod is slidably provided in the mounting base; the third hydraulic cylinder is fixedly provided on one side of the mounting base, and the output end of the third hydraulic cylinder is fixedly connected to the locking rod; a limit switch is fixedly provided in each of the radial locking holes.

[0015] The present invention also provides a method of using an automatic fan blade welding machine, comprising the following steps: S1: The robot arm installs the base to be welded onto the base clamping assembly located at the loading and unloading station; S2: The drive component drives the rotating column to rotate 180 degrees, causing the base clamping component with the base installed to be rotated to the welding station, and the other base clamping component to be rotated to the loading and unloading station; S3: The robot arm places the fan blade to be welded onto the fan blade clamping and conveying assembly, and at the same time, the robot arm installs the next base to be welded onto the base clamping assembly located at the loading and unloading station; S4: The fan blade clamping and conveying assembly clamps the fan blade and conveys it to the welding position on the side of the base; the lifting contact assembly descends and contacts the base to conduct electricity; power is applied to complete the spot welding of the current fan blade; S5: After welding is completed, the lifting contact component rises and disengages from the base, and the fan blade clamping and conveying component is released and retracts to its original position. S6: The base clamping assembly located at the welding station drives the base to rotate around its own axis by a preset angle so that the next welding position is aligned with the fan blade clamping and conveying assembly. S7: Repeat S3~S6 until all fan blades on the circumferential direction of the base are welded together to obtain the finished fan blade assembly; S8: The drive component drives the rotating column to rotate 180 degrees, causing the base clamping component with the welded fan blade assembly to be rotated to the loading and unloading station. The base clamping component with the new base is rotated to the welding station, and then the robot arm removes the welded fan blade assembly and enters the next welding cycle.

[0016] This invention discloses an automatic fan blade welding machine and its method of use. Two base clamping assemblies are configured, and a rotating column reciprocates within a 180-degree range, allowing the two base clamping assemblies to alternate between a welding station and a loading / unloading station. Welding and loading / unloading are performed simultaneously, significantly reducing waiting time and increasing production cycle time. The rotating column uses a 180-degree reciprocating rotation instead of continuous circular rotation, preventing the wires connecting various electrical components from becoming tangled and broken due to continuous rotation, thus reducing wiring difficulty. During welding, a robotic arm mounts the base onto the base clamping assembly located at the loading / unloading station. The base clamping assembly secures the base through its inner hole, and the rotating column rotates 180 degrees to deliver it into the welding station. The fan blade clamping and conveying assembly horizontally clamps and conveys the fan blade to the side of the base, and the lifting contact assembly descends to contact and conduct with the lower end face of the base. The fan blade clamping and conveying assembly serves as the first electrode, and the lifting contact assembly serves as the second electrode. The welding power supply outputs a large current through both, generating resistance heat at the contact surface between the fan blade and the base to complete the butt welding. After one piece is welded, the lifting contact assembly rises a short distance to detach from the base, and the base clamping assembly drives the base to rotate at a preset angle to align the next welding position. The lifting contact assembly then descends again to contact the base for welding the next piece. Simultaneously, the loading and unloading stations can simultaneously install the next base or remove the finished product, achieving parallel operation of welding and loading / unloading. Because the rotating cylinder is tilted, the base is installed in an inclined posture, while the fan blade is horizontally clamped and conveyed. Therefore, after welding, the fan blade and base naturally form the installation angle required by the fan blade itself. This solves the problems of non-compact work cycle and low production efficiency in existing technologies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention.

[0019] Figure 2 This is a structural schematic diagram of the first embodiment of the present invention from another angle.

[0020] Figure 3 This is a cross-sectional view of the first embodiment of the present invention.

[0021] Figure 4 yes Figure 3 A magnified view of detail A.

[0022] Figure 5 This is a schematic diagram of the base clamping assembly of the present invention.

[0023] Figure 6 This is a structural schematic diagram of the base clamping assembly of the present invention from another angle.

[0024] Figure 7 This is a cross-sectional view of the base clamping assembly of the present invention.

[0025] Figure 8 This is a flowchart illustrating the second embodiment of the present invention.

[0026] 1-Workbench, 2-Rotating column, 3-Base clamping assembly, 4-Drive assembly, 5-Fan blade clamping and conveying assembly, 6-Lifting contact assembly, 7-Locking assembly, 201-Radial locking hole, 301-Bracket, 302-Rotating cylinder, 303-Drive mechanism, 304-Slider, 305-Abutment, 306-Adjusting mechanism, 30301-First servo motor, 30302-First gear, 30303-First gear ring, 30601-Lead screw, 30602-Driven bevel gear, 30603-Adjusting mechanism Segment shaft, 30604-drive bevel gear, 401-second servo motor, 402-second gear, 403-second gear ring, 501-guide rail, 502-sliding seat, 503-first hydraulic cylinder, 504-first guide rod, 505-top clamping block, 506-second hydraulic cylinder, 507-bottom clamping block, 601-support plate, 602-second guide rod, 603-contact block, 604-servo electric cylinder, 701-mounting seat, 702-locking rod, 703-third hydraulic cylinder, 704-limit switch. Detailed Implementation

[0027] The first embodiment of this application is as follows: Please see Figures 1-7 ,in, Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention. Figure 2 This is a structural schematic diagram of the first embodiment of the present invention from another angle. Figure 3 This is a cross-sectional view of the first embodiment of the present invention. Figure 4 yes Figure 3 A magnified view of detail A. Figure 5 This is a schematic diagram of the base clamping assembly of the present invention. Figure 6 This is a structural schematic diagram of the base clamping assembly of the present invention from another angle. Figure 7 This is a cross-sectional view of the base clamping assembly of the present invention.

[0028] This invention provides an automatic fan blade welding machine: comprising a worktable 1, a rotating column 2, two base clamping assemblies 3, a drive assembly 4, a fan blade clamping and conveying assembly 5, and a lifting contact assembly 6; the base clamping assembly 3 includes a bracket 301, a rotating cylinder 302, a drive mechanism 303, four sliders 304, four abutments 305, and an adjustment mechanism 306; the drive mechanism 303 includes a first servo motor 30301, a first gear 30302, and a first gear ring 30303; the adjustment mechanism 306 includes four lead screws 30601, four driven bevel gears 30602, an adjustment shaft 30603, and a driving bevel gear 30604; the drive assembly 4 includes a second servo motor 401 and a second gear 40604. 02 and second gear ring 403; the fan blade clamping and conveying assembly 5 includes two guide rails 501, sliding seat 502, first hydraulic cylinder 503, two first guide rods 504, top clamping block 505, second hydraulic cylinder 506 and bottom clamping block 507; the lifting contact assembly 6 includes a support plate 601, two second guide rods 602, contact block 603 and servo electric cylinder 604; the automatic fan blade welding machine also includes a locking assembly 7; the locking assembly 7 includes a mounting base 701, locking rod 702, third hydraulic cylinder 703 and two limit switches 704; the rotating column 2 is symmetrically provided with two radial locking holes 201; the above solution solves the problems of non-compact working cycle and low production efficiency in the prior art.

[0029] Furthermore, the rotating column 2 is rotatably mounted on the worktable 1; two base clamping assemblies 3 are respectively mounted on the rotating column 2; the base clamping assembly 3 is used to clamp and fix the base from the inner hole of the base and drive the base to rotate around its own axis; the driving assembly 4 is mounted on the bottom of the worktable 1 and is used to drive the rotating column 2 to rotate; the fan blade clamping and conveying assembly 5 is mounted on the worktable 1; the lifting contact assembly 6 is mounted on the worktable 1; the fan blade clamping and conveying assembly 5 is used to clamp the fan blade to be welded and convey it to the side of the base, and serves as the first electrode during welding; the lifting contact assembly 6 is used to contact the base when descending, and serves as the second electrode during welding; the first electrode and the second electrode are respectively electrically connected to the two output terminals of the welding power supply.

[0030] In this embodiment, two base clamping assemblies 3 are provided. The rotating column 2 reciprocates within a 180-degree range, allowing the two base clamping assemblies 3 to alternate between the welding station and the loading / unloading station. Welding and loading / unloading are performed simultaneously, significantly reducing waiting time and increasing production cycle time. The rotating column 2 uses a 180-degree reciprocating rotation instead of continuous circular rotation, preventing the wires connecting various electrical components from becoming tangled and broken due to continuous rotation, thus reducing wiring difficulty. During welding, a robotic arm mounts the base onto the base clamping assembly 3 located at the loading / unloading station. The base clamping assembly 3 secures the base through its inner hole, and the rotating column 2 rotates 180 degrees to deliver it into the welding station. The fan blade clamping and conveying assembly 5 horizontally clamps and conveys the fan blade to the side of the base, and the lifting contact assembly 6 descends to contact and conduct with the lower end face of the base. The fan blade clamping and conveying assembly 5 serves as the first electrode, and the lifting contact assembly 6 serves as the second electrode. The welding power supply outputs a large current through both, generating resistance heat at the contact surface between the fan blade and the base to complete the butt welding. After one piece is welded, the lifting contact assembly 6 rises a short distance to detach from the base, and the base clamping assembly 3 drives the base to rotate at a preset angle to align the next welding position. The lifting contact assembly 6 then descends again to contact the base for welding the next piece. Simultaneously, the loading and unloading station can simultaneously install the next base or remove the finished product, achieving parallel operation of welding and loading / unloading. Because the rotating cylinder 302 is tilted, the base is tilted after installation, while the fan blade is horizontally clamped and conveyed. Therefore, after welding, the fan blade and base naturally form the installation angle required by the fan blade itself. This solves the problems of non-compact work cycle and low production efficiency in the prior art.

[0031] Furthermore, the bracket 301 is fixedly mounted on the rotating column 2; the rotating cylinder 302 is rotatably mounted on the bracket 301; the driving mechanism 303 is disposed on the side of the rotating cylinder 302 for driving the rotating cylinder 302 to rotate; four sliders 304 are slidably disposed inside the rotating cylinder 302; each slider 304 is fixedly mounted with a stop post 305, the stop post 305 penetrating the rotating cylinder 302; the adjusting mechanism 306 is disposed on the rotating cylinder 302 for driving the four sliders 304 to synchronously converge inward or separate outward along the radial direction.

[0032] In this embodiment, when installing the base, the four sliders 304 are first driven to converge radially inward by the adjustment mechanism 306, reducing the outer diameter of the abutment 305 to be smaller than the inner diameter of the base, facilitating the insertion of the base. After the base is inserted, the adjustment mechanism 306 drives the four sliders 304 to separate radially outward simultaneously, and the abutment 305 supports and fixes the base from the inner wall of the base. Since the rotating cylinder 302 is inclined on the bracket 301, the supported base also tilts accordingly, providing a basis for forming an installation angle with the horizontally clamped fan blade during subsequent welding. After welding one fan blade, the drive mechanism 303 drives the rotating cylinder 302 to rotate by a preset angle. The rotating cylinder 302 drives the base to rotate synchronously through the abutment 305, aligning the next welding position with the fan blade clamping and conveying assembly 5.

[0033] Furthermore, the first servo motor 30301 is fixedly mounted on the bracket 301; the first gear 30302 is fixedly mounted on the output end of the first servo motor 30301; and the first gear ring 30303 is fixedly mounted on the rotating cylinder 302 and meshes with the first gear 30302.

[0034] In this embodiment, the first servo motor 30301 starts, and its output drives the first gear 30302 to rotate. The first gear 30302 meshes with the first gear ring 30303, driving the first gear ring 30303 and the rotating cylinder 302 fixedly connected to it to rotate together. The rotating cylinder 302 is inclined, and its rotation axis coincides with the base axis. Therefore, when the rotating cylinder 302 rotates, the base rotates in increments around its own inclined axis. By controlling the number of rotation pulses of the first servo motor 30301, the rotation angle of the rotating cylinder 302 each time can be precisely controlled.

[0035] Furthermore, four lead screws 30601 are rotatably disposed within the rotating cylinder 302 and are threadedly connected to four sliders 304 respectively; a driven bevel gear 30602 is fixedly disposed at the end of each lead screw 30601; the adjusting shaft 30603 is rotatably disposed on the rotating cylinder 302 and passes through the rotating cylinder 302; the driving bevel gear 30604 is fixedly disposed at one end of the adjusting shaft 30603 and meshes with the four driven bevel gears 30602.

[0036] In this embodiment, when it is necessary to adjust the outer diameter of multiple abutments 305 to fit bases with different inner diameters, the adjusting shaft 30603 is rotated manually or with a tool. The adjusting shaft 30603 drives the driving bevel gear 30604 to rotate, and the driving bevel gear 30604 simultaneously meshes with four driven bevel gears 30602, driving the four driven bevel gears 30602 to rotate synchronously. Each driven bevel gear 30602 drives the lead screw 30601 fixedly connected to it to rotate, and the lead screw 30601 drives the corresponding slider 304 to move radially through a threaded connection. Because the four lead screws 30601 move synchronously, the four sliders 304 and the abutments 305 move together or apart synchronously. The lead screw 30601 has a self-locking characteristic and will not loosen due to centrifugal force or vibration after adjustment. Upon initial use, the knob at the end needs to be rotated according to the inner hole size of the base to turn the adjusting shaft 30603, driving the four abutments 305 to move radially synchronously to the appropriate position; subsequent clamping of bases of the same specification does not require further adjustment. As an alternative, a drive motor can be connected to the adjusting shaft 30603 to achieve electric adjustment, further improving the changeover efficiency.

[0037] Furthermore, the second servo motor 401 is fixedly mounted on the bottom of the worktable 1; the second gear 402 is fixedly mounted on the output end of the second servo motor 401; and the second gear ring 403 is fixedly mounted on the rotating column 2 and meshes with the second gear 402.

[0038] In this embodiment, the second servo motor 401 starts, driving the second gear 402 to rotate. The second gear 402 meshes with the second gear ring 403, causing the second gear ring 403 and the rotating column 2 to rotate together. The second servo motor 401 drives the rotating column 2 to reciprocate within a 180-degree range by rotating forward and backward, rather than continuously rotating in a circle, to solve the problem of wire tangling and breakage caused by continuous circular rotation, and to reduce the difficulty of equipment wiring. After rotating 180 degrees, the positions of the two base clamping components 3 are interchanged, with the one originally in the welding station switching to the loading / unloading station, and the one originally in the loading / unloading station switching to the welding station.

[0039] Furthermore, the two guide rails 501 are fixedly mounted on the top of the workbench 1; the sliding seat 502 is slidably mounted on the two guide rails 501; the first hydraulic cylinder 503 is fixedly mounted on the top of the workbench 1, and the output end of the first hydraulic cylinder 503 is fixedly connected to the sliding seat 502; the two first guide rods 504 are slidably mounted on the sliding seat 502, and the top clamping block 505 is fixedly mounted on the bottom end of the two first guide rods 504; the second hydraulic cylinder 506 is fixedly mounted on the sliding seat 502, and the output end of the second hydraulic cylinder 506 is fixedly connected to the top clamping block 505; the bottom clamping block 507 is fixedly mounted on the sliding seat 502 and located directly below the top clamping block 505; the bottom clamping block 507 is connected to one of the output ends of the welding power source via a wire.

[0040] In this embodiment, after the robotic arm places the fan blade to be welded onto the bottom clamping block 507, the second hydraulic cylinder 506 drives the top clamping block 505 to move downwards along the first guide rod 504, pressing the fan blade between the top clamping block 505 and the bottom clamping block 507. The fan blade is horizontally clamped. Subsequently, the first hydraulic cylinder 503 drives the sliding seat 502 to move along the guide rail 501 towards the base, conveying the welding end of the fan blade to the welding position on the side of the base. During welding, welding current flows from the bottom clamping block 507 into the fan blade, through the weld point, and into the base. Because the fan blade is horizontally clamped and the base is tilted, the fan blade and the base naturally form the required installation angle at the welding point.

[0041] Furthermore, the support plate 601 is fixedly mounted on the top of the workbench 1; the two second guide rods 602 are slidably mounted on the support plate 601; the contact block 603 is fixedly mounted on one end of the two second guide rods 602; the servo electric cylinder 604 is fixedly mounted on the support plate 601, and the output end of the servo electric cylinder 604 is fixedly connected to the contact block 603; the contact block 603 is connected to the other output end of the welding power supply through a wire.

[0042] In this embodiment, after the fan blade clamping and conveying assembly 5 conveys the fan blade into place, the servo cylinder 604 drives the contact block 603 to descend and move downward along the second guide rod 602, so that the lower end face of the contact block 603 presses against the upper end face of the base, forming a conductive path. During welding, current flows into the contact block 603 through the fan blade, the weld point, and the base, forming a complete welding circuit. After one fan blade is welded, the servo cylinder 604 drives the contact block 603 to rise a short distance, just enough to disengage the contact block 603 from the base. It is not necessary to rise too far, thus shortening the descent time for the next blade and improving the welding cycle time. At this time, the base can rotate in increments without friction with the contact block 603. When the rotating column 2 needs to switch positions and rotate 180 degrees, the entire base clamping assembly 3, together with the base, rotates significantly around the axis of the rotating column 2. The servo electric cylinder 604 drives the contact block 603 to rise significantly, so that the contact block 603 is completely away from the base and its rotation path, avoiding collision and interference with the rotating base and the base clamping assembly 3.

[0043] Furthermore, the locking component 7 is disposed below the worktable 1 and is used to lock the rotating column 2 after the rotating column 2 rotates.

[0044] In this embodiment, after the driving component 4 drives the rotating column 2 to the target station, the locking component 7 locks the rotating column 2 to prevent it from rotating slightly due to welding pressure or external force during the welding process. When it is necessary to switch stations, the locking component 7 first releases the lock before the rotating column 2 can rotate.

[0045] Furthermore, the rotating column 2 is symmetrically provided with two radial locking holes 201; the mounting base 701 is fixedly provided at the bottom of the workbench 1; the locking rod 702 is slidably provided in the mounting base 701; the third hydraulic cylinder 703 is fixedly provided on one side of the mounting base 701, and the output end of the third hydraulic cylinder 703 is fixedly connected to the locking rod 702; a limit switch 704 is fixedly provided in each of the radial locking holes 201.

[0046] In this embodiment, two radial locking holes 201 are symmetrically arranged on the rotating column 2, differing by 180 degrees in the circumferential direction. These holes correspond to the welding station and the loading / unloading station, respectively, ensuring that after the rotating column 2 rotates 180 degrees, the other radial locking hole 201 aligns precisely with the locking rod 702, achieving alternating locking between the two stations. When the rotating column 2 reaches its designated position, the third hydraulic cylinder 703 drives the locking rod 702 to extend and insert into the corresponding radial locking hole 201 on the rotating column 2. Once inserted, the locking rod 702 triggers the limit switch 704 within the radial locking hole 201. The limit switch 704 sends a locking signal, which the control system confirms before initiating the welding process. To unlock, the third hydraulic cylinder 703 drives the locking rod 702 to retract, exiting the radial locking hole 201, allowing the rotating column 2 to rotate freely. The feedback from the two limit switches 704 ensures that each lock is securely engaged, preventing safety hazards caused by false locking.

[0047] The second embodiment of this application is as follows: Based on the first embodiment, please refer to Figure 8 ,in, Figure 8 This is a flowchart illustrating the second embodiment of the present invention.

[0048] The present invention provides a method for using an automatic fan blade welding machine, comprising the following steps: S1: The robot arm installs the base to be welded onto the base clamping assembly 3 located at the loading and unloading station; S2: Drive component 4 drives rotating column 2 to rotate 180 degrees, causing base clamping component 3 with base installed to rotate to welding station, and another base clamping component 3 to rotate to loading and unloading station; S3: The robot arm places the fan blade to be welded onto the fan blade clamping and conveying assembly 5, and at the same time, the robot arm installs the next base to be welded onto the base clamping assembly 3 located at the loading and unloading station. S4: The fan blade clamping and conveying assembly 5 clamps the fan blade and conveys it to the welding position on the side of the base; the lifting contact assembly 6 descends and contacts the base to conduct electricity; power is applied to complete the spot welding of the current fan blade; S5: After welding is completed, the lifting contact component 6 rises and disengages from the base, and the fan blade clamping and conveying component 5 is released and retracts to its original position. S6: The base clamping assembly 3 located at the welding station drives the base to rotate around its own axis by a preset angle so that the next welding position is aligned with the fan blade clamping and conveying assembly 5. S7: Repeat S3~S6 until all fan blades on the circumferential direction of the base are welded together to obtain the finished fan blade assembly; S8: Drive component 4 drives rotating column 2 to rotate 180 degrees, causing base clamping component 3 with welded fan blade assembly finished product to rotate to the loading and unloading station. Base clamping component 3 with new base installed rotates to the welding station. Then, the robot arm removes the welded fan blade assembly finished product and enters the next welding cycle.

[0049] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. An automatic fan blade welding machine, characterized in that, Includes a worktable, a rotating column, two base clamping assemblies, a drive assembly, a fan blade clamping and conveying assembly, and a lifting contact assembly; The rotating column is rotatably mounted on the worktable; two base clamping assemblies are respectively mounted on the rotating column; the base clamping assemblies are used to clamp and fix the base from the inner hole of the base and drive the base to rotate around its own axis; the driving assembly is located at the bottom of the worktable and is used to drive the rotating column to rotate; the fan blade clamping and conveying assembly is located on the worktable; the lifting contact assembly is located on the worktable; the fan blade clamping and conveying assembly is used to clamp the fan blade to be welded and convey it to the side of the base, and serves as the first electrode during welding; the lifting contact assembly is used to contact the base during descent and serves as the second electrode during welding; the first electrode and the second electrode are respectively electrically connected to the two output terminals of the welding power supply.

2. The automatic fan blade welding machine as described in claim 1, characterized in that, The base clamping assembly includes a bracket, a rotating cylinder, a drive mechanism, four sliders, four abutments, and an adjustment mechanism; The bracket is fixedly mounted on the rotating column; the rotating cylinder is rotatably mounted on the bracket; the driving mechanism is located on the side of the rotating cylinder and is used to drive the rotating cylinder to rotate; the four sliders are slidably mounted inside the rotating cylinder; each slider is fixedly mounted with a stop post, the stop post penetrating the rotating cylinder; the adjusting mechanism is located on the rotating cylinder and is used to drive the four sliders to synchronously converge inward or separate outward along the radial direction.

3. The automatic fan blade welding machine as described in claim 2, characterized in that, The drive mechanism includes a first servo motor, a first gear, and a first gear ring; The first servo motor is fixedly mounted on the bracket; the first gear is fixedly mounted on the output end of the first servo motor; the first gear ring is fixedly mounted on the rotating cylinder and meshes with the first gear.

4. The automatic fan blade welding machine as described in claim 3, characterized in that, The adjustment mechanism includes four lead screws, four driven bevel gears, an adjustment shaft, and a driving bevel gear; The four lead screws are rotatably disposed inside the rotating cylinder and are threadedly connected to the four sliders respectively; a driven bevel gear is fixedly disposed at the end of each lead screw; the adjusting shaft is rotatably disposed on the rotating cylinder and passes through the rotating cylinder; the driving bevel gear is fixedly disposed at one end of the adjusting shaft and meshes with the four driven bevel gears.

5. The automatic fan blade welding machine as described in claim 4, characterized in that, The drive assembly includes a second servo motor, a second gear, and a second gear ring. The second servo motor is fixedly mounted on the bottom of the worktable; the second gear is fixedly mounted on the output end of the second servo motor; the second gear ring is fixedly mounted on the rotating column and meshes with the second gear.

6. The automatic fan blade welding machine as described in claim 5, characterized in that, The fan blade clamping and conveying assembly includes two guide rails, a sliding seat, a first hydraulic cylinder, two first guide rods, a top clamping block, a second hydraulic cylinder, and a bottom clamping block; Two guide rails are fixedly mounted on the top of the worktable; a sliding seat is slidably mounted on the two guide rails; a first hydraulic cylinder is fixedly mounted on the top of the worktable, and its output end is fixedly connected to the sliding seat; two first guide rods are slidably mounted on the sliding seat, and a top clamping block is fixedly mounted on the bottom end of the two first guide rods; a second hydraulic cylinder is fixedly mounted on the sliding seat, and its output end is fixedly connected to the top clamping block; a bottom clamping block is fixedly mounted on the sliding seat and located directly below the top clamping block; the bottom clamping block is connected to one of the output ends of the welding power source via a wire.

7. The automatic fan blade welding machine as described in claim 6, characterized in that, The lifting contact assembly includes a support plate, two second guide rods, a contact block, and a servo electric cylinder. The support plate is fixedly mounted on the top of the workbench; the two second guide rods are slidably mounted on the support plate; the contact block is fixedly mounted on one end of the two second guide rods; the servo electric cylinder is fixedly mounted on the support plate, and the output end of the servo electric cylinder is fixedly connected to the contact block; the contact block is connected to the other output end of the welding power supply through a wire.

8. The automatic fan blade welding machine as described in claim 7, characterized in that, The automatic fan blade welding machine also includes a locking component; The locking component is located below the workbench and is used to lock the rotating column after it rotates.

9. The automatic fan blade welding machine as described in claim 8, characterized in that, The locking assembly includes a mounting base, a locking lever, a third hydraulic cylinder, and two limit switches; The rotating column is symmetrically provided with two radial locking holes; the mounting base is fixedly provided at the bottom of the workbench; the locking rod is slidably provided in the mounting base; the third hydraulic cylinder is fixedly provided on one side of the mounting base, and the output end of the third hydraulic cylinder is fixedly connected to the locking rod; a limit switch is fixedly provided in each of the radial locking holes.

10. A method of using an automatic fan blade welding machine, applied to the automatic fan blade welding machine as described in any one of claims 1 to 9; characterized in that, Includes the following steps: S1: The robot arm installs the base to be welded onto the base clamping assembly located at the loading and unloading station; S2: The drive component drives the rotating column to rotate 180 degrees, causing the base clamping component with the base installed to be rotated to the welding station, and the other base clamping component to be rotated to the loading and unloading station; S3: The robot arm places the fan blade to be welded onto the fan blade clamping and conveying assembly, and at the same time, the robot arm installs the next base to be welded onto the base clamping assembly located at the loading and unloading station; S4: The fan blade clamping and conveying assembly clamps the fan blade and conveys it to the welding position on the side of the base; the lifting contact assembly descends and contacts the base to conduct electricity; power is applied to complete the spot welding of the current fan blade; S5: After welding is completed, the lifting contact component rises and disengages from the base, and the fan blade clamping and conveying component is released and retracts to its original position. S6: The base clamping assembly located at the welding station drives the base to rotate around its own axis by a preset angle so that the next welding position is aligned with the fan blade clamping and conveying assembly. S7: Repeat S3~S6 until all fan blades on the circumferential direction of the base are welded together to obtain the finished fan blade assembly; S8: The drive component drives the rotating column to rotate 180 degrees, causing the base clamping component with the welded fan blade assembly to be rotated to the loading and unloading station. The base clamping component with the new base is rotated to the welding station, and then the robot arm removes the welded fan blade assembly and enters the next welding cycle.

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