A welding positioning tool based on a blender blade

Abstract

The present application relates to the technical field of welding machine tooling, and specifically discloses a welding positioning tooling based on a mixer blade, which comprises a welding machine box, the top end of the welding machine box is fixedly connected with a rack, and the rack is provided with a lifting mechanism on one side; the hub is placed between the supporting table and the rotating pressure table, the rotating pressure table is driven by the lifting mechanism to press down to complete the clamping and fixing of the hub, then the positioning mechanism drives the welding guide positioning mechanism to translate to the corresponding station outside the hub, the operator directly inserts the equal-width flat mixing blade into the guide frame, the blade is clamped and fixed by the two side rollers and the reset spring extrusion rod to realize angle position limiting, the manual hub scribing and measuring process is saved, the blade is clamped and fixed by the tooling during the welding process, manual hand-holding support is not needed to prevent deviation, after the welding of a single blade is completed, the electric push rod drives the whole welding guide positioning mechanism to separate from the already-welded blade.

Description

Technical Field

[0001] This invention relates to the field of welding machine tooling technology, and in particular to a welding positioning tooling based on a mixer blade. Background Technology

[0002] Mixer blades are the core working components of various mixing and blending equipment. They are generally made of wear-resistant steel and have complex structures and various specifications. The blades are mainly fixed to the equipment hub or main shaft through welding. They rotate at high speed with the main shaft and shear water and other materials. They are the key components to ensure the mixing effect of the equipment.

[0003] Currently, when welding equal-width, straight agitator impellers, operators first manually scribble lines on the surface of the hub to be installed and use measuring tools to determine the positioning benchmark. Then, they align the agitator blades with the marked positions before carrying out the welding operation. This processing method is highly dependent on manual operation experience, and it is difficult to consistently control the scribing accuracy and alignment consistency. The welding process is prone to multiple defects such as blade angle deviation, uneven spacing between adjacent blades, and welding deformation of the components after welding. As a result, the dynamic balance performance of the finished impeller cannot meet the design standards, and the impeller exhibits obvious shaking and abnormal noise when it is put into operation, which greatly shortens the service life of the entire machine. Summary of the Invention

[0004] The purpose of this invention is to provide a welding positioning fixture based on mixer blades, so as to solve the problems of traditional manual welding relying on scribing and measurement for positioning, which is prone to problems such as blade angle deviation, uneven spacing, and welding deformation, resulting in substandard dynamic balance of the finished impeller and abnormal vibration and noise during equipment operation.

[0005] To achieve the above objectives, the present invention provides a welding positioning fixture based on a mixer blade, comprising a welding housing, a frame fixedly connected to one side of the top of the welding housing, a lifting mechanism on one side of the frame, a movable plate slidably connected to one side of the frame via the lifting mechanism, a rotating wiping mechanism on one side of the movable plate, a rotating pressure table rotatably connected to the bottom of the movable plate via the rotating wiping mechanism, a fixed plate fixedly connected to one side of the frame below the movable plate, a support platform rotatably connected to the top of the fixed plate via a bearing, an electric push rod fixedly connected to the side of the frame away from the lifting mechanism, an assembly frame fixedly connected to the output end of the electric push rod, an adjustment mechanism on one side of the assembly frame, a welding guide positioning mechanism slidably connected to one side of the assembly frame via the adjustment mechanism, a control panel fixedly connected to one side of the frame, a multi-axis adjustment bracket fixedly connected to one side of the fixed plate, and a laser welding gun slidably and rotatably connected to the fixed plate via the multi-axis adjustment bracket.

[0006] Furthermore, the lifting mechanism includes a first lead screw, which is rotatably connected inside the frame. A first screw seat is threaded onto the outer surface of the first lead screw. A connecting plate is fixedly connected to one side of the first screw seat. One side of the connecting plate is fixedly connected to one side of the moving plate. A first motor is fixedly connected to one side of the top of the frame. A first worm gear is fixedly connected to the output end of the first motor. A first worm wheel is meshed with one side of the first worm gear. A first connecting rod is fixedly connected to one side of the first worm wheel. The first connecting rod is rotatably connected to the top of the frame via a bearing, and the bottom end of the first connecting rod is fixedly connected to the top end of the first lead screw.

[0007] Furthermore, the frame has first guide grooves on both sides inside, and first guide wheels are slidably connected inside the first guide grooves. The two first guide wheels are fixedly connected to both sides of the first screw seat.

[0008] Furthermore, the rotating wiping mechanism includes a second motor, which is fixedly connected to one side of the top of the moving plate. A small gear is fixedly connected to the output end of the second motor, and a large gear is meshed with one side of the small gear. A first shaft is fixedly connected to the middle of the large gear. The first shaft is rotatably connected to the moving plate through a bearing. The bottom end of the first shaft is fixedly connected to the top of the rotating pressure table. A baffle plate is fixedly connected to the side of the first shaft away from the rotating pressure table. An infrared sensor is fixedly connected to the bottom end of the moving plate by bolts, and multiple infrared sensors are evenly spaced.

[0009] Furthermore, a second shaft is fixedly connected to the middle of the pinion, and the second shaft is rotatably connected to the moving plate via a bearing. A driving tooth cone is fixedly connected to the bottom end of the second shaft, and a driven tooth cone is meshed with one side of the driving tooth cone. A rotating sleeve is fixedly connected to the middle of the driven tooth cone, and the rotating sleeve is rotatably connected to the lower side of the moving plate. A rotating rod is slidably connected inside the rotating sleeve, and a buffer spring is fixedly connected between the rotating rod and the inside of the rotating sleeve. A wiping brush is fixedly connected to the lower end of the rotating rod near the rotating pressure table.

[0010] Furthermore, a guide rod is fixedly connected to one side of the assembly frame located on the electric push rod, and a guide frame is fixedly connected to one side of the frame, with the guide rod and the guide frame being slidably connected.

[0011] Furthermore, the adjusting mechanism includes a second lead screw, which is rotatably connected inside the assembly frame. A second screw seat is threaded onto the outer surface of the second lead screw. A connecting rod is fixedly connected to one side of the second screw seat. One side of the connecting rod is fixedly connected to one side of the welding guide positioning mechanism. A third motor is fixedly connected to one side of the assembly frame. A second worm gear is fixedly connected to the output end of the third motor. A second worm wheel is meshed with one side of the second worm gear. A second connecting rod is fixedly connected to the middle of the second worm wheel. The second connecting rod is rotatably connected to the assembly frame through a bearing, and one end of the second connecting rod is fixedly connected to one end of the second lead screw.

[0012] Furthermore, a second guide groove is provided on both sides of the interior of the assembly frame, and a second guide wheel is slidably connected inside the second guide groove. Both second guide wheels are fixedly connected to the second screw seat.

[0013] Furthermore, the welding guide positioning mechanism includes a guide frame, which is fixedly connected to one side of the connecting rod. Supports are fixedly connected to both sides of the guide frame. Return springs are fixedly connected to both sides of one end of each support. A pressing rod is fixedly connected to one side of the return spring. A mounting plate is fixedly connected to one side of the pressing rod through the guide frame. Rollers are rotatably connected inside the mounting plate.

[0014] Furthermore, a sliding rod is fixedly connected to the side of the compression rod near the return spring, and sliding sleeves are fixedly connected to both sides of the end of the bracket away from the return spring, with the sliding rod and sliding sleeves slidably connected.

[0015] Compared with the prior art, the beneficial effects of the present invention are: Firstly, in this invention, the hub is placed between the support platform and the rotating pressure platform. A lifting mechanism drives the rotating pressure platform downwards to clamp and fix the hub. Then, an adjustment mechanism moves the welding guide positioning mechanism to the corresponding position outside the hub. The operator directly inserts the equal-width, straight stirring blade into the guide frame. Rollers on both sides, along with a reset spring and a pressing rod, clamp the blade to achieve angular positioning. This eliminates the need for manual hub marking and measuring. During welding, the blade is clamped and fixed by the fixture, eliminating the need for manual support to prevent displacement. After welding a single blade, an electric push rod drives... The entire welding guide and positioning mechanism detaches from the already welded blades. Then, the rotating wiping mechanism drives the rotating pressure table to simultaneously rotate the hub on the support platform below at a fixed angle, switching to the next blade welding station. After the station is adjusted to the correct position, the electric push rod extends again and, in conjunction with the adjustment mechanism, resets the welding guide and positioning mechanism, allowing the next set of blades to be positioned and welded. This avoids problems such as blade angle distortion and uneven circumferential spacing caused by manual operation, significantly improving the impeller welding processing efficiency and positioning dimension accuracy, effectively avoiding post-weld deformation defects, and ensuring that the finished impeller meets the dynamic balance standards.

[0016] Secondly, in this invention, during the process of the rotating wiping mechanism driving the rotating pressure table and the hub to rotate synchronously to adjust the welding position, the output end of the second motor synchronously drives the pinion and the second shaft to rotate together. The active tooth cone at the lower end of the second shaft rotates and meshes with the driven tooth cone. The driven tooth cone drives the rotating rod and the wiping brush on the rod to rotate synchronously at high speed. Before the hub switches to a welding point, the rotating wiping brush will sweep across the corresponding welding contact surface of the hub in advance to remove large impurities that may be attached to the surface of the hub, prevent impurities from accumulating and affecting the weld fusion effect, reduce the generation of poor welds such as welding porosity and incomplete welding, and improve the overall welding quality of the impeller. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 In this invention Figure 1 A magnified structural diagram at point A; Figure 3 This is a schematic diagram of the rear structure of the device in this invention; Figure 4 In this invention Figure 3 A magnified structural diagram at point B; Figure 5 This is a schematic diagram of the connection structure between the assembly frame and the welding guide and positioning mechanism in this invention; Figure 6 This is a schematic cross-sectional view of the assembly frame in this invention; Figure 7 This is a schematic diagram of the welding guide and positioning mechanism in this invention; Figure 8 This is a schematic diagram of the lower structure of the movable plate in this invention; Figure 9 This is a schematic diagram of the upper structure of the movable plate in this invention; Figure 10 In this invention Figure 8 A magnified structural diagram at point C; Figure 11 This is a schematic diagram of the fixed plate structure in this invention.

[0018] In the diagram: 1. Welding chassis; 2. Frame; 3. Fixing plate; 301. Support platform; 4. Moving plate; 401. Rotary pressure table; 5. Lifting mechanism; 501. First lead screw; 502. First screw seat; 503. Connecting plate; 504. First motor; 505. First worm gear; 506. First worm wheel; 507. First connecting rod; 508. First guide groove; 509. First guide wheel; 6. Rotary wiping mechanism; 601. Second motor; 602. Small gear; 603. Large gear; 604. First shaft; 605. Baffle plate; 606. Infrared sensor; 607. Second shaft; 608. Driving bevel gear; 609. Driven bevel gear; 610. Rotation 611. Rod; 612. Wiping brush; 7. Rotating sleeve; 8. Electric push rod; 901. Guide rod; 102. Guide frame; 11. Assembly frame; 22. Welding guide positioning mechanism; 33. Guide frame; 44. Mounting plate; 55. Roller; 66. Pressing rod; 77. Return spring; 88. Bracket; 99. Slide rod; 100. Slide sleeve; 11. Adjustment mechanism; 12. Second lead screw; 13. Second screw seat; 14. Connecting rod; 15. Third motor; 16. Second worm gear; 17. Second connecting rod; 18. Second guide groove; 19. Second guide wheel; 100. Control panel; 12. Laser welding gun. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 11In this embodiment of the invention, a welding positioning fixture based on a mixer blade includes a welding housing 1. A frame 2 is fixedly connected to one side of the top of the welding housing 1. A lifting mechanism 5 is provided on one side of the frame 2. A movable plate 4 is slidably connected to one side of the frame 2 via the lifting mechanism 5. A rotating wiping mechanism 6 is provided on one side of the movable plate 4. A rotating pressure table 401 is rotatably connected to the bottom of the movable plate 4 via the rotating wiping mechanism 6. A fixed plate 3 is fixedly connected to one side of the frame 2 below the movable plate 4. A support table 301 is rotatably connected to the top of the fixed plate 3 via a bearing. An electric push rod 7 is fixedly connected to the side of the frame 2 away from the lifting mechanism 5. An assembly frame 8 is fixedly connected to the output end of the electric push rod 7. An adjustment mechanism 10 is provided on one side of the assembly frame 8. A welding guide positioning mechanism 9 is slidably connected to one side of the assembly frame 8 through the adjustment mechanism 10. A control panel 11 is fixedly connected to one side of the frame 2. A multi-axis adjustment bracket is fixedly connected to one side of the fixed plate 3. The multi-axis adjustment bracket includes a height slide rail, a horizontal slide seat, and an angle deflection seat. The laser welding gun 12 is mounted on the angle deflection seat to achieve three-dimensional space and pitch angle adjustment and positioning.

[0021] Please see Figures 3-4 The lifting mechanism 5 includes a first lead screw 501, which is rotatably connected inside the frame 2. A first screw seat 502 is threaded onto the outer surface of the first lead screw 501. A connecting plate 503 is fixedly connected to one side of the first screw seat 502. One side of the connecting plate 503 is fixedly connected to one side of the moving plate 4. A first motor 504 is fixedly connected to one side of the top of the frame 2. A first worm gear 505 is fixedly connected to the output end of the first motor 504. A first worm wheel 506 is meshed with one side of the first worm gear 505. A first connecting rod 507 is fixedly connected to one side of the frame 2. The first connecting rod 507 is rotatably connected to the top of the frame 2 through a bearing, and the bottom end of the first connecting rod 507 is fixedly connected to the top end of the first lead screw 501. The first motor 504, the first worm 505, the first worm wheel 506, the first lead screw 501, and the first screw seat 502 form an integrated lifting drive structure, which can provide stable power for the up and down movement of the moving plate 4 and the rotating pressure table 401, so that the rotating pressure table 401 cooperates with the support table 301 to fix the hub. The worm and worm wheel have self-locking properties, which can prevent loosening that could cause the hub to loosen.

[0022] Please see Figure 4The frame 2 has a first guide groove 508 on both sides inside. A first guide wheel 509 is slidably connected inside the first guide groove 508. The two first guide wheels 509 are fixedly connected to both sides of the first screw seat 502. Through the cooperation of the first guide groove 508 and the first guide wheel 509, the lifting stroke of the first screw seat 502 can be limited, effectively eliminating the shaking generated during the transmission of the first lead screw 501, and making the entire lifting and adjustment process more stable and smooth. This greatly improves the coaxiality of the rotating pressure table 401 pressing and clamping, and ensures that the wheel hub is firmly clamped.

[0023] Please see Figures 8-10 The rotating wiping mechanism 6 includes a second motor 601, which is fixedly connected to one side of the top of the movable plate 4. A small gear 602 is fixedly connected to the output end of the second motor 601. A large gear 603 is meshed with one side of the small gear 602. A first shaft 604 is fixedly connected to the middle of the large gear 603. The first shaft 604 is rotatably connected to the movable plate 4 via a bearing. The bottom end of the first shaft 604 is fixedly connected to the top of the rotating pressure table 401. A baffle plate 605 is fixedly connected to the side of the first shaft 604 away from the rotating pressure table 401. The bottom end of the movable plate 4 is bolted inside. An infrared sensor 606 is fixedly connected, and multiple infrared sensors 606 are evenly spaced, with the number determined by the number of blades to be welded. Through the second motor 601, pinion 602, gear 603, and first shaft 604, the rotating pressure table 401 and the clamped and fixed hub can be driven to rotate precisely, realizing station switching and replacing manual adjustment. With the matching baffle 605 and infrared sensor 606, whenever the baffle 605 blocks the signal of an infrared sensor 606, the control panel 11 controls the pause, thereby accurately sensing the blade welding point on the hub, realizing alignment calibration, and further improving the accuracy of welding station switching.

[0024] Please see Figure 10A second shaft 607 is fixedly connected to the middle of the pinion 602. The second shaft 607 is rotatably connected to the moving plate 4 via a bearing. A driving tooth cone 608 is fixedly connected to the bottom end of the second shaft 607. A driven tooth cone 609 is meshed with one side of the driving tooth cone 608. A rotating sleeve 612 is fixedly connected to the middle of the driven tooth cone 609. The rotating sleeve 612 is rotatably connected to the lower side of the moving plate 4. A rotating rod 610 is slidably connected inside the rotating sleeve 612. A buffer spring is fixedly connected between the rotating rod 610 and the inside of the rotating sleeve. A wiping brush 611 is fixedly connected to the lower end of the rotating rod 610 near the rotating pressure table 401. It should be noted that before the hub is sent into the tooling for the welding process... The initial cleaning has been completed uniformly, ensuring the basic cleanliness of the surface. The wiping brush 611 installed here only serves as an auxiliary impurity removal tool, used to clean up any blocky impurities accidentally left behind during the clamping process. The tooling can also be equipped with an air pump blowing assembly to work in conjunction with the wiping brush 611 to remove impurities and reduce weld defects. Through the second shaft 607, the active toothed cone 608, the driven toothed cone 609, and the rotating rod 610, the wiping brush 611 can be driven synchronously by the rotation of the workstation, without the need for a separate drive device. It can simultaneously complete the auxiliary cleaning of the next contact surface to be welded during the process of switching welding stations at the hub. With the help of the external air pump blowing assembly, the cleanliness of the contact surface can be further improved, effectively reducing defects such as welding porosity and incomplete welding, and improving the quality of weld formation.

[0025] Please see Figure 2 A guide rod 701 is fixedly connected to one side of the electric push rod 7 on the assembly frame 8, and a guide frame 702 is fixedly connected to one side of the frame 2. The guide rod 701 and the guide frame 702 are slidably connected. Through the sliding cooperation between the guide rod 701 and the guide frame 702, the assembly frame 8 driven by the electric push rod 7 is horizontally limited and guided, effectively offsetting the lateral stress generated during the extension and retraction of the electric push rod 7, and avoiding the problems of left and right swaying and misalignment of the assembly frame 8.

[0026] Please see Figures 5-6The adjusting mechanism 10 includes a second lead screw 101, which is rotatably connected inside the assembly frame 8. A second screw seat 102 is threaded onto the outer surface of the second lead screw 101. A connecting rod 103 is fixedly connected to one side of the second screw seat 102. One side of the connecting rod 103 is fixedly connected to one side of the welding guide positioning mechanism 9. A third motor 104 is fixedly connected to one side of the assembly frame 8. A second worm gear 105 is fixedly connected to the output end of the third motor 104. A second worm wheel 106 is meshed with one side of the second worm gear 105. A [missing information - likely a component or mechanism] is fixedly connected to the middle of the second worm wheel 106. The second connecting rod 107 is rotatably connected to the assembly frame 8 via a bearing, and one end of the second connecting rod 107 is fixedly connected to one end of the second lead screw 101. The position adjustment of the welding guide positioning mechanism 9 can be realized through the third motor 104, the second worm 105, the second worm wheel 106, the second lead screw 101, and the second screw seat 102. After the hub is placed, the welding guide positioning mechanism 9 is sent to the work station. After processing is completed, the welding guide positioning mechanism 9 is driven away from the hub. The worm gear transmission structure has self-locking properties. After adjustment, it can stably lock the positioning position to prevent the mechanism from shifting during welding.

[0027] Please see Figure 6 The assembly frame 8 has a second guide groove 108 on both sides inside. A second guide wheel 109 is slidably connected inside the second guide groove 108. Both second guide wheels 109 are fixedly connected to the second screw seat 102. Through the cooperation of the second guide groove 108 and the second guide wheel 109, the lifting stroke of the second screw seat 102 can be limited, effectively eliminating the shaking generated during the transmission of the second lead screw 101. This facilitates stable adjustment of the position of the welding guide positioning mechanism 9 and ensures that the welding guide positioning mechanism 9 accurately guides the insertion of the equal-width and straight stirring impeller.

[0028] Please see Figure 7The welding guide and positioning mechanism 9 includes a guide frame 901, which is fixedly connected to one side of the connecting rod 103. Supports 906 are fixedly connected to both sides of the guide frame 901. Return springs 905 are fixedly connected to both sides of one end of each support 906. A pressing rod 904 is fixedly connected to one side of the return spring 905. One side of the pressing rod 904 slides through the guide frame 901 and is fixedly connected to a mounting plate 902. A roller 903 is rotatably connected inside the mounting plate 902. Through the coordinated operation of the guide frame 901, support 906, return spring 905, pressing rod 904, and roller 903, after the tooling completes the wheel hub clamping and the adjusting mechanism 10 moves the guide frame 901 closer to the wheel hub position, the operator can directly insert the stirring blade into the guide frame 901. The pressing rods 904 on both sides automatically clamp the blade inward under the elastic force of the return spring 905, and the roller 903 structure flexibly fits and limits the blade. The entire working process does not require manual alignment or support of the blades, and the blades are centered, aligned, and fixed, which facilitates subsequent welding operations. The roller 903 makes rolling contact with the blades, which can significantly reduce the frictional resistance during the blade insertion, removal, and alignment process.

[0029] Please see Figure 7 The pressing rod 904 is fixedly connected to a sliding rod 907 on the side near the return spring 905. The bracket 906 is fixedly connected to two sliding sleeves 908 on both sides of the end away from the return spring 905. The sliding rod 907 is slidably connected to the sliding sleeve 908. Through the sliding fit structure between the sliding rod 907 and the sliding sleeve 908, during the working process of the return spring 905 driving the pressing rod 904 to reciprocate clamping and releasing, the sliding rod 907 always slides linearly along the inside of the sliding sleeve 908, accurately guiding and constraining the extension and retraction of the pressing rod 904, thereby ensuring the position of the roller 903 of the mounting plate 902 and avoiding problems such as blade angle error and welding deformation caused by clamping deviation.

[0030] The working principle of this invention is as follows: First, the worker places the impeller hub to be processed stably on the surface of the support platform 301 at the top of the fixed plate 3. The support platform 301 supports and positions the bottom of the hub. Then, the lifting mechanism 5 is started through the control panel 11. The first motor 504 drives the first worm 505 to mesh with the first worm wheel 506 to rotate, which drives the first lead screw 501 to rotate. The first screw seat 502 moves down smoothly under the limiting guidance of the first guide wheel 509 and the first guide groove 508, which drives the moving plate 4 and the rotating pressure table 401 at the bottom to move down synchronously. Finally, the hub is firmly pressed between the support platform 301 and the rotating pressure table 401. After the workpiece is clamped, the electric push rod 7 drives the assembly frame 8 to move forward as a whole. At the same time, the guide rod 701 slides along the guide frame 702 to ensure that the assembly frame 8 moves horizontally without deviation. Then, the third motor 104 of the adjustment mechanism 10 is started, which drives the second lead screw 101 to rotate through the second worm 105 and the second worm wheel 106. The second screw seat 102 slides smoothly under the precise limit of the second guide wheel 109 and the second guide groove 108, which drives the connecting rod 103 and the welding guide positioning mechanism 9 at the end to make fine adjustments and move precisely to the preset welding position on the outside of the hub. The operator inserts the uniformly wide, straight stirring blade to be welded directly into the guide frame 901. During the pushing process, the blade presses against the rollers 903 on both sides. The rollers 903 drive the mounting plate 902 and the pressing rod 904 to move outward and compress the return spring 905. The return spring 905's reverse elastic force achieves adaptive clamping and centering of the blade. At the same time, the sliding rod 907 and the sliding sleeve 908 cooperate to prevent the pressing rollers 903 from shifting. Therefore, there is no need for manual alignment or hand-held fixation, eliminating manual alignment deviation. After the blade is positioned, the operator can adjust the multi-axis adjustment bracket according to the specific thickness of the hub and the specifications of the blade, so that the focus of the laser welding gun 12 is precisely aligned with the welding joint between the bottom of the blade and the hub. Then, the welding operation between the blade and the hub is carried out. After a single blade is welded, the control panel 11 controls the electric push rod 7 to move, causing the welding guide positioning mechanism 9 to retract and disengage from the welded blade, avoiding interference with the hub rotation and adjustment. Then, the second motor 601 of the rotating wiping mechanism 6 is activated. The output of the second motor 601 drives the pinion 602 to rotate. On one hand, the pinion 602 meshes with the large gear 603, driving the first shaft 604 and the rotating pressure table 401 to rotate the clamped hub at a fixed angle. This, combined with the equally spaced infrared sensors 606 and the baffle plate 605, achieves precise station stopping, ensuring uniform circumferential spacing at each blade welding station. On the other hand, the pinion 602... Wheel 602 synchronously drives the second shaft 607, the active toothed bevel 608, and the driven toothed bevel 609 to drive the rotating sleeve 612 to rotate the internal sliding limit rotating rod 610 and the wiping brush 611 at the bottom. When the moving plate 4 presses down to clamp the wheel hub, the wiping brush 611 contacts the wheel hub surface and compresses the buffer return spring upward under the reaction force. The deformation elasticity of the buffer return spring makes the wiping brush 611 flexibly fit the wheel hub surface. Then, while the wheel hub rotates and switches positions, the contact surface of the next set of wheel hubs to be welded is cleaned in advance to remove any possible attached blocky impurities. With the optional air pump blowing structure, the cleanliness of the contact surface is further improved. After the current station is cleaned and rotated and aligned, the electric push rod 7 is extended again and the adjustment mechanism 10 is finely adjusted and reset. The welding guide positioning mechanism 9 is sent to the working position, and the blade insertion, adaptive clamping and laser welding processes are repeated to complete the positioning welding operation of all stirring blades on the outer circumference of the hub in sequence. Compared to the traditional manual marking and alignment method, this technical solution completely eliminates manual measurement and alignment processes, solving problems such as unstable positioning accuracy, blade angle skew, uneven circumferential spacing, and post-weld deformation caused by differences in human experience. It significantly improves the welding accuracy of impellers and the consistency of mass production, thereby increasing welding efficiency.

Claims

1. A welding positioning fixture based on mixer blades, characterized in that, The assembly includes a welding machine housing (1), with a frame (2) fixedly connected to one side of the top of the welding machine housing (1). A lifting mechanism (5) is provided on one side of the frame (2). A movable plate (4) is slidably connected to one side of the frame (2) via the lifting mechanism (5). A rotating wiping mechanism (6) is provided on one side of the movable plate (4). A rotating pressure table (401) is rotatably connected to the bottom of the movable plate (4) via the rotating wiping mechanism (6). A fixed plate (3) is fixedly connected to one side of the frame (2) below the movable plate (4). A support table is rotatably connected to the top of the fixed plate (3) via a bearing. 301), an electric push rod (7) is fixedly connected to the side of the frame (2) away from the lifting mechanism (5). An assembly frame (8) is fixedly connected to the output end of the electric push rod (7). An adjustment mechanism (10) is provided on one side of the assembly frame (8). A welding guide positioning mechanism (9) is slidably connected to one side of the assembly frame (8) through the adjustment mechanism (10). A control panel (11) is fixedly connected to one side of the frame (2). A multi-axis adjustment bracket is fixedly connected to one side of the fixed plate (3). The laser welding gun (12) is slidably and rotatably connected to the fixed plate (3) through the multi-axis adjustment bracket.

2. The welding positioning fixture based on mixer blades according to claim 1, characterized in that, The lifting mechanism (5) includes a first lead screw (501), which is rotatably connected inside the frame (2). The outer surface of the first lead screw (501) is threaded with a first screw seat (502). A connecting plate (503) is fixedly connected to one side of the first screw seat (502). One side of the connecting plate (503) is fixedly connected to one side of the moving plate (4). A first motor (504) is fixedly connected to one side of the top of the frame (2). A first worm (505) is fixedly connected to the output end of the first motor (504). A first worm wheel (506) is meshed with one side of the first worm (505). A first connecting rod (507) is fixedly connected to one side of the first worm wheel (506). The first connecting rod (507) is rotatably connected to the top of the frame (2) through a bearing, and the bottom end of the first connecting rod (507) is fixedly connected to the top end of the first lead screw (501).

3. The welding positioning fixture based on mixer blades according to claim 2, characterized in that, The frame (2) has a first guide groove (508) on both sides inside. The first guide groove (508) is slidably connected to a first guide wheel (509). The two first guide wheels (509) are fixedly connected to both sides of the first screw seat (502).

4. The welding positioning fixture based on a mixer blade according to claim 1, characterized in that, The rotating wiping mechanism (6) includes a second motor (601), which is fixedly connected to one side of the top of the moving plate (4). A small gear (602) is fixedly connected to the output end of the second motor (601). A large gear (603) is meshed with one side of the small gear (602). A first shaft (604) is fixedly connected to the middle of the large gear (603). The first shaft (604) is rotatably connected to the moving plate (4) through a bearing. The bottom end of the first shaft (604) is fixedly connected to the top end of the rotating pressure table (401). A shielding plate (605) is fixedly connected to the side of the first shaft (604) away from the rotating pressure table (401). An infrared sensor (606) is fixedly connected to the bottom end of the moving plate (4) by bolts. Multiple infrared sensors (606) are provided at equal intervals.

5. The welding positioning fixture based on mixer blades according to claim 4, characterized in that, A second shaft (607) is fixedly connected to the middle of the pinion (602). The second shaft (607) is rotatably connected to the moving plate (4) via a bearing. An active toothed cone (608) is fixedly connected to the bottom end of the second shaft (607). A driven toothed cone (609) is meshed with one side of the active toothed cone (608). A rotating sleeve (612) is fixedly connected to the middle of the driven toothed cone (609). The rotating sleeve (612) is rotatably connected to the lower side of the moving plate (4). A rotating rod (610) is slidably connected inside the rotating sleeve (612). A buffer spring is fixedly connected between the rotating rod (610) and the inside of the rotating sleeve. A wiping brush (611) is fixedly connected to the lower end of the rotating rod (610) near the rotating pressure table (401).

6. The welding positioning fixture based on a mixer blade according to claim 1, characterized in that, A guide rod (701) is fixedly connected to one side of the electric push rod (7) on the assembly frame (8), and a guide frame (702) is fixedly connected to one side of the frame (2). The guide rod (701) and the guide frame (702) are slidably connected.

7. The welding positioning fixture based on mixer blades according to claim 1, characterized in that, The adjusting mechanism (10) includes a second lead screw (101), which is rotatably connected inside the assembly frame (8). The outer surface of the second lead screw (101) is threaded with a second screw seat (102). A connecting rod (103) is fixedly connected to one side of the second screw seat (102). One side of the connecting rod (103) is fixedly connected to one side of the welding guide positioning mechanism (9). A third motor (104) is fixedly connected to one side of the assembly frame (8). A second worm (105) is fixedly connected to the output end of the third motor (104). A second worm wheel (106) is meshed with one side of the second worm (105). A second connecting rod (107) is fixedly connected to the middle of the second worm wheel (106). The second connecting rod (107) is rotatably connected to the assembly frame (8) through a bearing, and one end of the second connecting rod (107) is fixedly connected to one end of the second lead screw (101).

8. The welding positioning fixture based on a mixer blade according to claim 7, characterized in that, The assembly frame (8) has a second guide groove (108) on both sides inside. The second guide groove (108) is slidably connected to a second guide wheel (109). Both second guide wheels (109) are fixedly connected to the second screw seat (102).

9. A welding positioning fixture based on a mixer blade according to claim 7, characterized in that, The welding guide positioning mechanism (9) includes a guide frame (901), which is fixedly connected to one side of the connecting rod (103). Both sides of the guide frame (901) are fixedly connected to brackets (906). Both sides of one end of the brackets (906) are fixedly connected to return springs (905). One side of the return spring (905) is fixedly connected to a pressing rod (904). One side of the pressing rod (904) slides through the guide frame (901) and is fixedly connected to a mounting plate (902). The inside of the mounting plate (902) is rotatably connected to a roller (903).

10. A welding positioning fixture based on a mixer blade according to claim 9, characterized in that, The compression rod (904) is fixedly connected to a slide rod (907) on the side near the return spring (905), and the bracket (906) is fixedly connected to two sides of the end away from the return spring (905), and the slide rod (907) is slidably connected to the slide sleeve (908).

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