A motorcycle bumper welding apparatus

Abstract

This invention relates to the field of bumper welding technology and discloses a motorcycle bumper welding device, including a support frame with a bottom frame at its base, two processing mechanisms, and two clamping mechanisms. The two processing mechanisms and two clamping mechanisms are alternately arranged on the four side walls of the support frame and are positioned opposite to each other. Each processing mechanism includes a cross-shaped fixing plate slidably connected to the support frame. A welding head is located at the end of the cross-shaped fixing plate away from the ground, and a grinding component is located at the end of the cross-shaped fixing plate closer to the ground. Each clamping mechanism includes a clamping plate slidably connected to the support frame. Rotary shafts are rotatably connected to both ends of the clamping plate, and a lifting block is fixedly connected to the side of the rotating shaft closest to the center of the support frame. This invention integrates the welding head and grinding component into a single device, allowing for immediate grinding of the metal frame while it is still warm after welding, reducing grinding difficulty and improving grinding quality.

Description

Technical Field

[0001] This invention relates to the field of bumper welding technology, specifically a motorcycle bumper welding device. Background Technology

[0002] In existing technologies, motorcycle bumpers are generally manufactured using metal steel pipes through bending and welding processes to reduce processing difficulty and manufacturing costs. For a U-shaped bumper installed in front of the motorcycle's radiator, the typical manufacturing process involves bending a metal steel pipe multiple times to form a U-shaped structure, then welding the ends of the pipe together to create a closed ring frame. This type of bumper is directly exposed to the exterior of the motorcycle's skid plate, requiring high appearance quality. Therefore, after welding, the weld seams need to be ground to eliminate weld beads, slag, and surface unevenness. Currently, this processing is typically completed using separate welding and grinding equipment. The welding process generally uses general welding equipment such as electric arc welding machines, argon arc welding machines, or carbon dioxide gas shielded welding machines to fuse the bent pipe joints. The grinding process relies on angle grinders, belt sanders, or specialized grinders to refine the weld area and obtain a smooth, continuous surface finish.

[0003] However, the aforementioned existing technical solutions have significant shortcomings. Existing welding equipment only possesses a single welding function and cannot simultaneously perform grinding. This necessitates that after welding, the workpiece must be unloaded from the welding station and transferred to the grinding station for re-clamping and repositioning before grinding. Grinding the weld when it is still at a relatively high temperature after welding yields better results, but the transfer between processes causes the weld to cool down before grinding, increasing the difficulty of grinding and affecting the grinding quality. Therefore, there is an urgent need for a motorcycle bumper welding equipment that integrates welding and grinding functions to overcome the shortcomings of existing technologies, such as fragmented processes and low efficiency. Summary of the Invention

[0004] This invention provides a motorcycle bumper welding device that solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A motorcycle bumper welding device includes a support frame, a bottom frame at the bottom of the support frame, two processing mechanisms and two clamping mechanisms, the two processing mechanisms and the two clamping mechanisms being alternately arranged on the four side walls of the support frame and arranged opposite to each other; The processing mechanism includes a cross-shaped fixing plate that is slidably connected to the support frame. A welding head is provided at the end of the cross-shaped fixing plate away from the ground, and a grinding component is provided at the end of the cross-shaped fixing plate close to the ground. The clamping mechanism includes a clamping plate that is slidably connected to the support frame. The two ends of the clamping plate are rotatably connected to the rotating shafts. A lifting block is fixedly connected to the side of the rotating shafts near the center of the support frame. A clamping assembly is provided on the lifting block. The clamping assembly is used to detachably connect to the metal tube frame. The centerline of the tubular portion at the welding or clamping position of the metal tube frame is collinear with the rotation axis of the lifting block, and the tubular portion at the welding or clamping position of the metal tube frame is at the same height as the welding head and the grinding assembly.

[0006] As a preferred embodiment of the present invention, guide rods that are slidably connected to the support frame are provided on both sides of the cross-shaped fixing plate, and a lifting device is provided on the side of the support frame, with the output end of the lifting device connected to the middle of the cross-shaped fixing plate.

[0007] As a preferred embodiment of the present invention, the grinding assembly includes a U-shaped mounting base disposed at the end of the cross fixing plate. The U-shaped mounting base is located on the side of the cross fixing plate near the center of the support frame. Driven wheels are rotatably connected to both ends of the U-shaped mounting base, and a grinding belt is wrapped around the outside of the driven wheels.

[0008] As a preferred embodiment of the present invention, a rotation drive device for driving the grinding belt to rotate is provided on the side of the cross fixing plate away from the center of the support frame, and a clearance hole for the grinding belt to pass through is provided on the cross fixing plate.

[0009] As a preferred embodiment of the present invention, the clamping plate is slidably connected to a guide post fixedly connected to the inner wall of the support frame, and the side of the support frame is provided with a reciprocating lateral movement drive assembly for driving the clamping plate to slide relative to the support frame.

[0010] As a preferred embodiment of the present invention, the reciprocating lateral movement drive assembly includes a U-shaped frame fixedly connected to the outer wall of the support frame, sliding rods fixedly connected to the clamping plate at both ends of the U-shaped frame, a fixed rod fixedly connected to the end of the sliding rod away from the clamping plate, a rotating wheel rotatably connected to the middle of the U-shaped frame, a push rod rotatably connected to the outer side of the rotating wheel, and the other end of the push rod rotatably connected to the middle of the fixed rod.

[0011] As a preferred embodiment of the present invention, the lifting block has an L-shaped structure, and a guide triangular block is provided on the side of the lifting block away from the center of the support frame to drive the metal tube frame to move toward the center of the support frame. The end of the clamping plate is provided with a drive motor to drive the rotating shaft to rotate.

[0012] As a preferred embodiment of the present invention, the clamping assembly includes rotating seats disposed on both sides of the lifting block, the rotating seats being rotatably connected to the middle of the rotating frame, a clamping head being disposed at one end of the rotating frame near the metal tube frame, and a pad being disposed on the lifting block to cooperate with the clamping head to fix the metal tube frame.

[0013] As a preferred embodiment of the present invention, a rotating head is rotatably connected to the side of the lifting block away from the metal tube frame, and one end of a connecting rod is hinged to the outer side of the rotating head, while the other end of the connecting rod is hinged to the side of the rotating frame away from the metal tube frame.

[0014] As a preferred embodiment of the present invention, a plurality of guide frames are evenly distributed on the bottom frame, and the guide frames are inclined on the side away from the ground.

[0015] The present invention has the following advantages: 1. Process integration and synchronous processing: By integrating the welding head and grinding components into a single device and using a dual-station arrangement, welding can be performed at the upper station while grinding is performed at the lower station. The two processes are executed in parallel, completely eliminating the process flow of transferring the workpiece to an independent grinding device for re-clamping after welding, as required by existing technologies, thereby significantly improving the overall processing efficiency.

[0016] 2. Residual heat grinding improves grinding efficiency: Since the metal pipe frame after welding is transferred to the next station for grinding in a short time, the weld area still maintains a high residual temperature. The metal material is in a hot state, with relatively low hardness and the surface oxide layer has not yet fully formed. The cutting resistance of the grinding belt to grind the hot weld is significantly reduced, thereby improving grinding efficiency and reducing the wear rate of the grinding belt.

[0017] 3. Compact structure and optimized space: The cross-shaped fixing plate integrates the welding head and grinding components into the same motion unit. The radial feed of the welding head and grinding components is driven synchronously by a single lifting device, which reduces the number of independent driving components, making the overall structure of the equipment compact, with a small footprint, and easy to arrange in the production line.

[0018] 4. Improved surface quality through repeated reciprocating grinding: The reciprocating lateral drive component drives the clamping plate to move back and forth, causing the grinding belt to generate a reciprocating grinding motion along the axis of the pipe relative to the weld area of ​​the metal pipe frame. Combined with the rotational motion of the metal pipe frame itself, the grinding belt forms a cross-shaped grinding trajectory on the weld surface, effectively eliminating the surface texture that may be generated by unidirectional grinding, and significantly improving the flatness and uniformity of the weld surface.

[0019] 5. One-time clamping ensures uniform processing datum: During the process of transferring the metal pipe frame from the upper station to the lower station, its clamping datum position (i.e. the pipe section in contact with the pad and clamping head) remains unchanged. The welding and grinding processes are completed based on the same clamping datum surface, avoiding positioning errors introduced by re-clamping and ensuring a high degree of consistency between the weld grinding trajectory and the welding trajectory.

[0020] 6. Guide triangle blocks enable rapid positioning: The lifting block is equipped with guide triangle blocks, whose inclined surfaces automatically guide the metal tube frame to slide into the arc-shaped positioning groove of the pad block during the workpiece placement process. This allows the operator to complete the precise positioning simply by roughly placing the metal tube frame on the lifting block, which significantly shortens the clamping auxiliary time and reduces the skill requirements of the operator.

[0021] 7. Automatic Unloading and Debris Separation: An inclined guide frame is installed on the bottom frame. After grinding, the metal tube frame automatically falls onto the guide frame and slides out along the inclined surface after the clamping assembly is released, eliminating the need for manual handling and unloading. At the same time, the gap between adjacent guide frames allows welding slag and grinding debris to fall directly to the ground, achieving automatic separation of workpieces and processing waste, reducing subsequent cleaning workload.

[0022] 8. Improved operational safety: Due to the dual-station arrangement of the clamping mechanism, the operator's hands are always located in the external space in front of the support frame, away from the working area of ​​the welding head and grinding belt of the processing mechanism on the left and right sides. This effectively reduces the risk of the operator coming into contact with the high-temperature welding arc and the high-speed rotating grinding belt, thus improving operational safety.

[0023] 9. Suitable for continuous batch production: The complete work cycle formed by the above steps enables the equipment to achieve uninterrupted continuous processing after stable operation. The workpiece clamping and unloading processes take up little time, and the welding and grinding processes highly overlap in time, resulting in a significant reduction in the overall processing cycle time. This makes it suitable for the high-volume, high-efficiency production needs of motorcycle bumpers. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a motorcycle bumper welding device.

[0026] Figure 2 This is a front view of a motorcycle bumper welding device.

[0027] Figure 3 This is a schematic diagram of the processing mechanism in a motorcycle bumper welding equipment when processing a metal tube frame.

[0028] Figure 4 This is a schematic diagram of the structure of a metal tube frame and clamping mechanism in a motorcycle bumper welding equipment.

[0029] Figure 5 for Figure 4 The front view.

[0030] Figure 6 This is a schematic diagram of the clamping mechanism in a motorcycle bumper welding equipment.

[0031] Figure 7 This is a schematic diagram of the clamping component in a motorcycle bumper welding device.

[0032] Figure 8 This is a schematic diagram of the processing mechanism in a motorcycle bumper welding equipment.

[0033] Figure 9 This is a schematic diagram of the cross-shaped fixing plate in a motorcycle bumper welding device.

[0034] Figure 10 This is a schematic diagram of the grinding component in a motorcycle bumper welding equipment.

[0035] In the diagram: 1. Support frame; 2. Base frame; 3. Guide frame; 4. Processing mechanism; 5. Clamping mechanism; 6. Guide column; 7. Clamping plate; 8. U-shaped frame; 9. Sliding rod; 10. Fixed rod; 11. Push rod; 12. Rotating wheel; 13. Reciprocating transverse drive assembly; 14. Rotating shaft; 15. Drive motor; 16. Lifting block; 17. Clamping assembly; 18. Metal tube frame; 19. Rotating seat; 20. Rotating frame; 21. Clamping head; 22. Rotating head; 23. Connecting rod; 24. Pad block; 25. Guide triangle block; 26. Rotary drive device; 27. Guide rod; 28. Lifting device; 29. ​​Cross fixing plate; 30. Welding head; 31. Grinding assembly; 32. U-shaped mounting seat; 33. Driven wheel; 34. Grinding belt; 35. Clearance hole. Detailed Implementation

[0036] 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.

[0037] In one embodiment, see Figures 1-3A motorcycle bumper welding device includes a support frame 1, a base frame 2, a processing mechanism 4, and a clamping mechanism 5.

[0038] The support frame 1 is a rectangular frame structure, made of bent and welded metal sheets, possessing sufficient structural strength and overall stability to support and install various functional mechanisms. A base frame 2 is fixedly connected to the bottom of the support frame 1, supporting the entire welding equipment relative to the ground at the predetermined working height.

[0039] Two processing mechanisms 4 and two clamping mechanisms 5 are alternately arranged on the four side walls of the support frame 1, and are positioned opposite to each other. Specifically, the two processing mechanisms 4 are respectively located on the left and right side walls of the support frame 1, and the two clamping mechanisms 5 are respectively located on the front and rear side walls of the support frame 1, forming a rectangular processing area. When the processing mechanisms 4 and clamping mechanisms 5 move towards the center of the support frame 1, they respectively perform welding, grinding, and clamping positioning operations on the metal tube frame 18 located within the processing area.

[0040] The bottom of the support frame 1 is fixedly connected to the bottom frame 2. The bottom frame 2 is a U-shaped structure with the front and back facing each other. Its opening is fixed to the left and right sides below the support frame 1, so as to stably support the entire welding equipment above the ground.

[0041] Three guide frames 3 are evenly distributed along the front-to-back direction on the bottom frame 2, with the upper surface of the guide frames 3 inclined to the lower left. After the welding and grinding processes are completed, the metal tube frame 18 detaches from the clamping mechanism 5 and falls onto the upper surface of the guide frames 3 under gravity. The metal tube frame 18 then slides down the inclined surface to the lower left, thus achieving automatic unloading. A preset interval is maintained between the three guide frames 3, allowing welding slag generated during welding and metal debris generated during grinding to fall directly to the ground through the gaps between adjacent guide frames 3, achieving automatic separation and collection of processing debris.

[0042] Preferably, the tilt angle of the guide frame 3 is set to 15° to 30° to ensure that the metal tube frame 18 can reliably slide down under gravity without generating excessive impact. A wear-resistant liner may be attached to the upper surface of the guide frame 3 to extend its service life.

[0043] In one instance of this embodiment, please refer to Figure 3 , Figure 8 , Figure 9 and Figure 10 The processing mechanism 4 includes a cross-shaped fixing plate 29, a welding head 30, and a grinding assembly 31.

[0044] The cross-shaped fixing plate 29 can slide relative to the support frame 1 in the left-right direction. Guide rods 27 are symmetrically fixed to the front and rear sides of the cross-shaped fixing plate 29, extending in the left-right direction and slidingly engaging with linear bearings mounted on the sidewalls of the support frame 1, thus providing smooth guidance for the left-right reciprocating movement of the cross-shaped fixing plate 29. Lifting devices 28 are fixedly installed on the middle portions of the outer surfaces of the left and right side walls of the support frame 1, preferably using servo electric cylinders, with their output ends fixedly connected to the middle of the cross-shaped fixing plate 29. When the lifting device 28 is activated, it drives the cross-shaped fixing plate 29 to move along the guide rods 27 toward or away from the center of the support frame 1, thereby adjusting the radial feed of the welding head 30 and the grinding assembly 31 relative to the metal tube frame 18.

[0045] A welding head 30 is fixedly installed at the end of the cross-shaped fixing plate 29 away from the ground (i.e., the upper end). The welding head 30 is preferably an argon arc welding head 30, and is equipped with an automatic wire feeding mechanism and a welding parameter adjustment panel for welding the butt welds of the metal pipe frame 18. A grinding assembly 31 is fixedly installed at the end of the cross-shaped fixing plate 29 closer to the ground (i.e., the lower end) for grinding and finishing the weld area of ​​the welded metal pipe frame 18.

[0046] The grinding assembly 31 includes a U-shaped mounting base 32, driven wheels 33, and a grinding belt 34. The U-shaped mounting base 32 is fixed to the lower end of the cross-shaped fixing plate 29 and is located on the side of the cross-shaped fixing plate 29 near the center of the support frame 1, with its opening facing the center of the support frame 1. The upper and lower ends of the U-shaped mounting base 32 are rotatably connected to the driven wheels 33 via bearings, and an annular grinding belt 34 is sleeved on the outside of the two driven wheels 33. Abrasive particles are adhered to the outer surface of the grinding belt 34 for grinding the outer surface of the weld seam of the metal pipe frame 18.

[0047] A rotary drive device 26 is mounted on the side of the cross-shaped fixing plate 29 away from the center of the support frame 1. The rotary drive device 26 is preferably a speed-regulating motor. A rectangular clearance hole 35 is provided on the cross-shaped fixing plate 29, and the upper half of the grinding belt 34 extends through the clearance hole 35 to the rear side of the cross-shaped fixing plate 29. A pulley is fixedly connected to the output end of the rotary drive device 26, and the grinding belt 34 is wrapped around the pulley. The rotary drive device 26 drives the grinding belt 34 to rotate at high speed between the driven wheels 33 through the pulley, thereby realizing continuous grinding of the weld area.

[0048] In one embodiment, the width of the grinding belt 34 ranges from 20 mm to 40 mm to accommodate weld widths of metal pipe frames 18 with different diameters. The rotational speed of the rotary drive device 26 is adjustable from 500 r / min to 3000 r / min to match different grinding process requirements.

[0049] In one instance of this embodiment, please refer to Figures 3-7The clamping mechanism 5 includes a clamping plate 7, a rotating shaft 14, a lifting block 16, a clamping assembly 17, and a reciprocating transverse drive assembly 13.

[0050] The clamping plate 7 is a rectangular plate structure, with a guide post 6 horizontally arranged along the front-back direction slidably connected in the middle. One end of the guide post 6 is fixedly connected to the inner wall of the support frame 1. The guide post 6 provides guidance and support for the back-and-forth reciprocating movement of the clamping plate 7.

[0051] A reciprocating lateral movement drive assembly 13 is provided on the outer side of the front wall of the support frame 1 to drive the clamping plate 7 to reciprocate back and forth relative to the support frame 1. The reciprocating lateral movement drive assembly 13 includes a U-shaped frame 8, sliding rods 9, fixed rods 10, rotating wheels 12, and push rods 11. The U-shaped frame 8 is fixedly connected to the outer wall of the support frame 1, with its opening facing outwards. Sliding rods 9 are slidably connected to the upper and lower ends of the U-shaped frame 8, respectively. The rear ends of the two sliding rods 9 (i.e., the ends closer to the center of the support frame 1) are fixedly connected to the clamping plate 7, and the front ends of the two sliding rods 9 (i.e., the ends farther from the center of the support frame 1) are jointly fixedly connected to a vertically arranged fixed rod 10. The rotating wheel 12 is rotatably connected to the middle of the U-shaped frame 8 via a bearing. The rotating wheel 12 is driven to rotate by a motor installed on the side of the U-shaped frame 8. One end of the push rod 11 is hinged to the outer eccentric position of the rotating wheel 12, and the other end of the push rod 11 is hinged to the middle of the fixed rod 10. The aforementioned U-shaped frame 8, sliding rod 9, fixed rod 10, rotating wheel 12, and push rod 11 together constitute a crank-slider mechanism. When the rotating wheel 12 rotates under the drive of the motor, the rotating wheel 12 drives the fixed rod 10 and sliding rod 9 to move back and forth in the front and rear directions through the push rod 11, thereby driving the clamping plate 7 to move closer to or away from the center of the support frame 1 along the guide post 6.

[0052] The upper and lower ends of the clamping plate 7 are rotatably connected to horizontally arranged rotating shafts 14 in the front-to-back direction via bearings. Each rotating shaft 14 has a support block 16 fixedly connected to its end near the center of the support frame 1. The support block 16 has an L-shaped structure; its horizontal section near the center of the support frame 1 supports the metal tube frame 18, and its vertical section connects to the rotating shafts 14. A guide triangle 25 is provided on the horizontal section of the support block 16 away from the center of the support frame 1, with the inclined surface of the guide triangle 25 facing the center of the support frame 1. During clamping, the inclined surface of the guide triangle 25 contacts the wall of the metal tube frame 18 and guides the metal tube frame 18 to move towards the center of the support frame 1, thereby achieving automatic position correction of the metal tube frame 18.

[0053] A pad 24 is fixedly mounted on the upper surface of the horizontal section of the supporting block 16. The upper surface of the pad 24 has an arc-shaped positioning groove that matches the outer diameter of the metal tube frame 18. The radius of curvature of this arc-shaped positioning groove is consistent with the radius of the metal tube frame 18, ensuring precise radial positioning of the metal tube frame 18 after it is placed on the pad 24. Preferably, rubber protective pads are adhered to the surface of the pad 24 and inside the arc-shaped positioning groove to prevent indentations or scratches on the surface of the metal tube frame 18 during clamping.

[0054] A drive motor 15 is fixedly mounted on the end of the clamping plate 7. The drive motor 15 is preferably a servo motor, and its output end is connected to the rotating shaft 14 via a coupling. When the drive motor 15 drives the rotating shaft 14 to rotate, it drives the lifting block 16 and the metal tube frame 18 fixed on it to rotate synchronously around the axis of the rotating shaft 14.

[0055] A clamping assembly 17 is provided on the lifting block 16 for detachably connecting and fixing the metal tube frame 18. The clamping assembly 17 includes a rotating seat 19, a rotating frame 20, a clamping head 21, a rotating head 22, and a connecting rod 23. Rotating seats 19 are symmetrically arranged on the left and right sides of the horizontal section of the lifting block 16. The center of the rotating frame 20 is rotatably connected to each rotating seat 19, allowing the rotating frame 20 to swing around the rotating seat 19 in a vertical plane. A clamping head 21 is fixedly installed at one end of the rotating frame 20 near the metal tube frame 18, with the clamping surface of the clamping head 21 facing the outer wall of the metal tube frame 18. A rubber protective pad is also affixed to the clamping surface of the clamping head 21 to protect the surface of the metal tube frame 18. A rotating head 22 is rotatably connected to the side of the lifting block 16 away from the metal tube frame 18 (i.e., the back of the lifting block 16). One end of two connecting rods 23 is hinged to the outer side of the rotating head 22, and the other end of the two connecting rods 23 is respectively hinged to the ends of the two rotating frames 20 away from the metal tube frame 18. A power unit for driving its rotation is provided inside the rotating head 22.

[0056] When the operator drives the rotating head 22 clockwise, the rotating head 22 synchronously drives the two rotating frames 20 to rotate around their respective rotating seats 19 via two connecting rods 23. This causes the two clamping heads 21 to swing downwards synchronously and press against the upper surface of the metal tube frame 18, cooperating with the pad block 24 to clamp and fix the metal tube frame 18. When the rotating head 22 is rotated counterclockwise, the two connecting rods 23 drive the rotating frames 20 to swing in the opposite direction, causing the clamping heads 21 to lift upwards and disengage from the metal tube frame 18, thus achieving quick disassembly of the metal tube frame 18.

[0057] It is particularly noteworthy that, because the arc-shaped positioning groove of the pad 24 matches the outer diameter of the metal tube frame 18, the centerline of the tubular portion at the clamping position of the metal tube frame 18 is collinear with the center of rotation of the support block 16 (i.e., the centerline of the rotating shaft 14) after the metal tube frame 18 is clamped. Simultaneously, the centerline of the tubular portion at the clamping position of the metal tube frame 18 is at the same height as the tip of the welding head 30 and the working surface of the grinding belt 34. This collinearity and equal height ensure that, during rotation, the surface of the metal tube frame 18 to be processed maintains a constant distance and contact with the welding head 30 or the grinding belt 34, thereby guaranteeing the stability of the welding arc and the uniformity of the amount of material removed by grinding.

[0058] The working process of the motorcycle bumper welding equipment provided in the embodiments of the present invention will be described in detail below in conjunction with the above structural description. For ease of description, the position of the upper lifting block 16 of the front clamping mechanism 5 of the support frame 1 is defined as the upper station, and the position of the lower lifting block 16 is defined as the lower station.

[0059] Step 1: Initial workpiece clamping A metal tube frame 18, CNC bent into a U-shape, is placed on the upper support block 16 of the front clamping mechanism 5. At this point, the metal tube frame 18 is positioned with its front and back facing each other, and the side of the metal tube frame 18 to be welded faces the support block 16, so that the butt weld to be welded is located on the side closest to the weld head 30. During placement, the tube wall of the metal tube frame 18 first contacts the inclined surface of the guide triangle block 25. Under the guidance of gravity and the inclined surface of the guide triangle block 25, the metal tube frame 18 automatically slides towards the center of the support frame 1 into the arc-shaped positioning groove of the pad block 24, completing the initial positioning.

[0060] The operator rotates the rotating head 22 clockwise. The rotating head 22, through two connecting rods 23, synchronously pushes the two rotating frames 20 to rotate around the rotating seat 19. The two clamping heads 21 swing downwards synchronously and press against the upper surface of the metal tube frame 18, cooperating with the pad block 24 to complete the clamping and fixing of the metal tube frame 18. At this time, the axis of the tubular part of the metal tube frame 18 at its clamping position is collinear with the axis of rotation 14 of the supporting block 16, and the weld position of the metal tube frame 18 is at the same height as the tip of the welding head 30.

[0061] Step 2: Initial workpiece welding Start the welding system and set the welding parameters: welding current 120A, welding voltage 20V, wire feed speed 5m / min. Start the lifting device 28. The output end of the lifting device 28 drives the cross fixing plate 29 to move along the guide rod 27 toward the center of the support frame 1, so that the tip of the welding head 30 approaches the weld position of the metal pipe frame 18 until the tip of the welding head 30 and the surface of the metal pipe frame 18 maintain an arc-starting gap of 2mm to 3mm.

[0062] The drive motor 15 is started, and the drive motor 15 drives the lifting block 16 and the metal tube frame 18 clamped on it to rotate through the rotating shaft 14, so that the weld of the metal tube frame 18 is turned to face the left or right welding head 30. The welding head 30 is started to start arc welding. At the same time, the drive motor 15 drives the metal tube frame 18 to rotate slowly and uniformly at a preset angular velocity, so that the weld is heated and fused evenly in the circumferential direction. During the welding process, the motor of the reciprocating transverse drive assembly 13 is started simultaneously, driving the rotating wheel 12 to rotate. The rotating wheel 12 drives the sliding rod 9 and the clamping plate 7 to move back and forth along the guide post 6 through the push rod 11 and the fixed rod 10. This causes the metal tube frame 18 to rotate while simultaneously moving back and forth in the front and back directions. The movement trajectory of the welding head 30 relative to the surface of the metal tube frame 18 is S-shaped, which effectively increases the weld width of a single weld and improves the connection strength of the weld.

[0063] Since processing mechanisms 4 are provided on both the left and right sides of the support frame 1, the welding heads 30 on both sides can perform welding operations simultaneously. Therefore, the metal pipe frame 18 only needs to rotate 180° to complete the fusion of the entire weld seam. After welding is completed, the welding head 30 automatically cuts off the arc and stops working.

[0064] Step 3: Initial welding completed and welding head retracted 30mm. After the welding process is completed, the lifting device 28 is started in reverse. The lifting device 28 drives the cross fixing plate 29 to move along the guide rod 27 in a direction away from the center of the support frame 1, so that the welding head 30 and the grinding assembly 31 are simultaneously removed from the surface of the metal tube frame 18.

[0065] Subsequently, the drive motor 15 is started, which drives the metal tube frame 18 to rotate to a vertical position (i.e., the plane of the metal tube frame 18 is perpendicular to the ground) so that the operator can carry out subsequent workpiece transfer operations.

[0066] Step 4: Workpiece transfer and new workpiece clamping The operator holds the already welded metal pipe frame 18 located at the upper workstation and rotates the rotating head 22 of the upper workstation counterclockwise. The rotating head 22 drives the rotating frame 20 to swing in the opposite direction through the connecting rod 23, and the clamping head 21 is lifted upward and disengaged from the metal pipe frame 18. At this time, the operator moves the already welded metal pipe frame 18 out of the upper workstation.

[0067] If the metal tube frame 18 that has been polished in the previous cycle is already on the lifting block 16 of the lower station, the metal tube frame 18 will fall off the lifting block 16 under the action of gravity and fall onto the inclined upper surface of the guide frame 3 below after the operator releases the rotating head 22 of the clamping component 17 of the lower station. The metal tube frame 18 will slide down to the left and down along the inclined surface to achieve automatic unloading.

[0068] The operator places the welded metal pipe frame 18 on the support block 16 of the lower station, and ensures that the welded part is within the clamping section of the support block 16 (i.e., the weld part does not interfere with the pad block 24 and the clamping head 21). The operator then rotates the rotating head 22 of the lower station clockwise so that the clamping assembly 17 of the lower station can clamp and fix the metal pipe frame 18.

[0069] Subsequently, the operator takes out a new, unwelded metal tube frame 18, places it on the lifting block 16 of the upper station, and aligns the part of the metal tube frame 18 to be welded with the lifting block 16. The operator then rotates the rotating head 22 of the upper station clockwise so that the clamping assembly 17 of the upper station can clamp and fix the new metal tube frame 18.

[0070] Step 5: Continuous welding and simultaneous grinding After the metal pipe frame 18 has been clamped and fixed at both the upper and lower workstations, the lifting device 28 is restarted. The lifting device 28 drives the cross fixing plate 29 to move towards the center of the support frame 1. The welding head 30 at the upper end of the cross fixing plate 29 approaches the surface of the metal pipe frame 18 to be welded at the upper workstation, while the grinding belt 34 at the lower end of the cross fixing plate 29 simultaneously approaches the weld surface of the metal pipe frame 18 at the lower workstation. The lifting device 28 continues to feed until the tip of the welding head 30 at the upper workstation reaches an arc-starting gap of 2mm to 3mm with the surface of the metal pipe frame 18. At this time, the outer working surface of the grinding belt 34 at the lower workstation is just close to the outer surface of the weld of the metal pipe frame 18.

[0071] The drive motor 15 is started, causing the metal tube frames 18 at the upper and lower workstations to rotate synchronously to the left or right. Simultaneously, the welding head 30 and grinding assembly 31 are activated. The welding head 30 at the upper workstation performs arc welding on the butt weld of the new metal tube frame 18, while the grinding belt 34 at the lower workstation rotates at high speed under the drive of the rotary drive device 26, grinding and finishing the weld area on the lower metal tube frame 18 that has just been welded (still retaining a high residual temperature). During the simultaneous welding and grinding process, the reciprocating lateral drive assembly 13 is activated again. The reciprocating movement of the clamping plate 7 in the front-to-back direction simultaneously drives the metal tube frames 18 at both the upper and lower workstations to swing back and forth synchronously. The welding head 30 at the upper workstation forms an S-shaped welding trajectory on the surface of the metal tube frame 18, while the grinding belt 34 at the lower workstation forms a reciprocating grinding trajectory in the weld area of ​​the metal tube frame 18, expanding the grinding coverage and improving grinding uniformity.

[0072] Preferably, the speed of the drive motor 15 corresponding to the lower station can be set to be higher than the speed of the drive motor 15 corresponding to the upper station, and the drive motor 15 of the lower station can adopt a reciprocating rotation mode (i.e., alternating between forward and reverse rotation), so that while the metal tube frame 18 of the upper station completes one 180° rotation, the metal tube frame 18 of the lower station has completed multiple 180° reciprocating swings, thereby enabling the grinding belt 34 to perform multiple reciprocating grindings on the weld area, further improving the grinding effect and surface finish.

[0073] Step Six: Grinding Completed and Automatic Unloading After the metal pipe frame 18 at the current workstation completes a preset number of reciprocating grinding cycles, the grinding component 31 stops working, and the welding head 30 automatically cuts off the arc after welding at the upper workstation. The lifting device 28 is then started in reverse, driving the cross fixing plate 29 to retract from the metal pipe frame 18.

[0074] The drive motor 15 is started to rotate the polished metal tube frame 18 in the lower station to a vertical position. The operator rotates the rotating head 22 of the lower station counterclockwise to release the clamping assembly 17 of the lower station. The polished metal tube frame 18 is released from the lifting block 16 under the action of gravity, falls onto the inclined upper surface of the guide frame 3 and slides out along the inclined surface for collection.

[0075] Step 7: Repeat the operation By repeating steps four through six, continuous batch welding and grinding of the motorcycle bumper metal frame 18 can be achieved. Under stable production conditions, the upper station always performs the welding process, and the lower station always performs the grinding process. The two processes are independent in space and parallel in time, which significantly improves the overall processing efficiency.

[0076] This invention provides a motorcycle bumper welding device. By integrating a welding head 30 and a grinding component 31 into a single device, and utilizing upper and lower dual workstations to achieve simultaneous welding and grinding, it eliminates inter-process transfer and multiple clamping, significantly improving processing efficiency. After welding, the metal tube frame 18 is immediately ground while still warm, reducing grinding difficulty and improving grinding quality. Welding and grinding are completed based on the same clamping datum, avoiding positioning errors introduced by re-clamping and ensuring consistent processing trajectory. Combined with the rapid positioning of the guide triangle block 25, the automatic unloading and debris separation of the guide frame 3, and the safe layout that keeps operators away from the processing area, the overall structure of the device is compact, with short auxiliary working time, making it suitable for continuous batch production.

[0077] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A motorcycle bumper welding device, comprising a support frame, wherein a bottom frame is provided at the bottom of the support frame, characterized in that, It also includes two processing mechanisms and two clamping mechanisms, which are alternately arranged on the four side walls of the support frame and are arranged opposite to each other; The processing mechanism includes a cross-shaped fixing plate that is slidably connected to the support frame. A welding head is provided at the end of the cross-shaped fixing plate away from the ground, and a grinding component is provided at the end of the cross-shaped fixing plate close to the ground. The clamping mechanism includes a clamping plate that is slidably connected to the support frame. The two ends of the clamping plate are rotatably connected to the rotating shafts. A lifting block is fixedly connected to the side of the rotating shafts near the center of the support frame. A clamping assembly is provided on the lifting block. The clamping assembly is used to detachably connect to the metal tube frame. The centerline of the tubular portion at the welding or clamping position of the metal tube frame is collinear with the rotation axis of the lifting block, and the tubular portion at the welding or clamping position of the metal tube frame is at the same height as the welding head and the grinding assembly.

2. The motorcycle bumper welding equipment according to claim 1, characterized in that, The cross-shaped fixing plate has guide rods on both sides that are slidably connected to the support frame. The support frame has a lifting device on its side, and the output end of the lifting device is connected to the middle of the cross-shaped fixing plate.

3. The motorcycle bumper welding equipment according to claim 1, characterized in that, The grinding assembly includes a U-shaped mounting base disposed at the end of the cross-shaped fixing plate. The U-shaped mounting base is located on the side of the cross-shaped fixing plate near the center of the support frame. Driven wheels are rotatably connected to both ends of the U-shaped mounting base, and a grinding belt is wrapped around the outside of the driven wheels.

4. The motorcycle bumper welding equipment according to claim 3, characterized in that, The cross-shaped fixing plate is provided with a rotation drive device on the side away from the center of the support frame to drive the grinding belt to rotate, and the cross-shaped fixing plate is provided with a clearance hole for the grinding belt to pass through.

5. The motorcycle bumper welding equipment according to claim 1, characterized in that, The clamping plate is slidably connected to a guide post that is fixedly connected to the inner wall of the support frame, and the side of the support frame is provided with a reciprocating lateral movement drive assembly that drives the clamping plate to slide relative to the support frame.

6. The motorcycle bumper welding equipment according to claim 5, characterized in that, The reciprocating lateral movement drive assembly includes a U-shaped frame fixedly connected to the outer wall of the support frame. Sliding rods fixedly connected to the clamping plate are slidably connected to both ends of the U-shaped frame. A fixed rod is fixedly connected to the end of the sliding rod away from the clamping plate. A rotating wheel is rotatably connected to the middle of the U-shaped frame. One end of a push rod is rotatably connected to the outer side of the rotating wheel. The other end of the push rod is rotatably connected to the middle of the fixed rod.

7. The motorcycle bumper welding equipment according to claim 1, characterized in that, The lifting block has an L-shaped structure. A guide triangular block is provided on the side of the lifting block away from the center of the support frame to drive the metal tube frame to move toward the center of the support frame. A drive motor is provided at the end of the clamping plate to drive the rotating shaft to rotate.

8. The motorcycle bumper welding equipment according to claim 1, characterized in that, The clamping assembly includes rotating seats disposed on both sides of the lifting block, the rotating seats being rotatably connected to the middle of the rotating frame, a clamping head being disposed at one end of the rotating frame near the metal tube frame, and a pad being disposed on the lifting block to cooperate with the clamping head to fix the metal tube frame.

9. A motorcycle bumper welding device according to claim 8, characterized in that, A rotating head is rotatably connected to the side of the lifting block away from the metal tube frame. One end of a connecting rod is hinged to the outer side of the rotating head, and the other end of the connecting rod is hinged to the side of the rotating frame away from the metal tube frame.

10. A motorcycle bumper welding device according to claim 1, characterized in that, Multiple guide frames are evenly distributed on the bottom frame, and the guide frames are inclined on the side away from the ground.

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