Electric tricycle hub steel ring butt welding device

Abstract

The invention discloses an electro-tricycle hub steel ring butt welding device and belongs to the technical field of hub welding. The electro-tricycle hub steel ring butt welding device comprises a workbench, and a containing groove and a forming groove are formed in the workbench; a lifting frame slides on the workbench; the lifting frame is connected with a forming pressing wheel; two lower pressing blocks are symmetrically distributed on the two sides of the upper portion of the forming pressing wheel and used for pressing the two ends of a plate, so that the two ends of the plate are attached to the upper surface of the forming pressing wheel, the two ends of the plate are connected right above the forming pressing wheel to form a welding seam, and a welding gun moves along the welding seam of the plate. Through cooperation of the placing groove, the forming groove, the movable check block and the fixed check block on the workbench, a plate can be placed at a proper position, and the middle of the plate is formed into a shape meeting the requirement through the forming gap between the forming pressing wheel and the forming groove. And meanwhile, through the synergistic effect of the lower pressing block and the side pressing block, bending and pressing of the two ends of the plate can be controlled, and the defects such as wrinkles are avoided.

Description

Technical Field

[0001] This invention relates to a welding device for the steel rim of an electric tricycle wheel hub, belonging to the field of wheel hub welding technology. Background Technology

[0002] In the intelligent welding process of electric tricycle wheel hub rims, the butt welding step is one of the key steps. Traditional butt welding methods often have many problems. For example, it is difficult to accurately control the shape and position of the sheet metal during forming and welding, resulting in unstable welding quality. During the sheet metal forming process, excessive friction can easily cause bending deformation, affecting the overall performance of the rim. At the same time, the alignment and clamping operations at both ends of the sheet metal are not precise enough, which can easily lead to defects such as wrinkles, thus affecting the quality of the wheel hub rim and production efficiency. Therefore, a butt welding device for electric tricycle wheel hub rims is proposed. Summary of the Invention

[0003] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a welding device for the wheel hub steel rims of electric tricycles, which ensures the overall quality of the wheel hub steel rims of electric tricycles, reduces rework and scrap due to quality problems, and improves production efficiency.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a wheel hub steel rim welding device for an electric tricycle, including a workbench, wherein the workbench is provided with; A placement slot is provided on the workbench for placing the sheet material to be formed; A forming groove is provided on the workbench and located below the center of the placement groove, and the bottom of the forming groove is semi-circular. A lifting frame that slides vertically on a worktable; A forming pressure roller, connected to a lifting frame, is used to press the plate in the placement slot into the interior of the forming slot; Two pressure blocks are symmetrically distributed on both sides above the forming roller. They are used to press the two ends of the sheet metal so that the two ends of the sheet metal are attached to the upper surface of the forming roller. The two ends of the sheet metal are connected above the forming roller to form a weld seam. A welding gun, which moves along the weld seam of the plate to weld the weld seam.

[0005] Preferably, a pressure plate is slidably connected to the lifting frame via a first hydraulic cylinder, and two lower pressure blocks are symmetrically arranged on the lower end face of the pressure plate; When the first hydraulic cylinder drives the pressure plate to move downward, the pressure plate moves downward along with the two lower pressure blocks, thus pressing both ends of the sheet metal onto the surface of the forming pressure roller.

[0006] Preferably, the lower surface of the pressing block is arc-shaped, and the radius of the arc on the lower surface of the pressing block is the same as the radius of the semi-circular bottom of the forming groove; When the forming roller presses the middle part of the sheet into the forming groove, the two ends of the sheet are located directly below the lower surface of the arc-shaped lower pressing block on the same side.

[0007] Preferably, the lower surface of the pressure plate is provided with grooves on both sides, the upper end face of the lower pressure block is fixed with a slider, the slider is slidably connected to the inside of the groove on the same side, and the groove is provided with a spring for spring-pressing and spreading the two lower pressure blocks apart. The upper end of the forming groove is provided with inclined walls on both sides, and a pressing block is fixed on the outer wall of the lower pressing block. When the pressure plate drives the two lower pressure blocks to move downwards, the abutting block presses against the inclined wall on the same side, so that the lower pressure blocks can slide towards the middle of the pressure plate.

[0008] Preferably, side pressure blocks are symmetrically slidably connected to both sides of the forming groove on the worktable via a second hydraulic cylinder. The side pressure block has an arc shape at one end near the forming groove, and the radius of the arc end face of the side pressure block is the same as the radius of the semi-circular bottom of the forming groove. When the forming roller presses the sheet into the forming groove, the side pressure blocks press against both sides of the sheet, causing the two ends of the sheet to bend towards the middle.

[0009] Preferably, a central groove is provided in the middle of the pressure plate, and a moving block is slidably connected inside the central groove through a fourth hydraulic cylinder, and the welding gun is mounted on the moving block.

[0010] Preferably, a groove is formed directly above the forming roller, and the groove extends along its length.

[0011] Preferably, a fixed stop is provided at one end of the placement slot and a movable stop is provided at the other end; When the board is placed in the placement slot, the movable stop pushes the board toward the fixed stop, so that the board is in the middle position of the placement slot.

[0012] Preferably, the worktable, located below the placement slot, is rotatably connected to a lead screw via a motor, and the lower end of the movable stop is engaged with the lead screw; When the motor drives the lead screw to rotate, the lead screw moves the movable stop closer to or away from the fixed stop.

[0013] Preferably, guide wheels are rotatably connected to both sides of the upper end of the forming groove to reduce friction when the sheet metal is bent and deformed.

[0014] Compared with existing technologies: 1. This invention, through the cooperation of the placement groove, forming groove, movable stop, and fixed stop on the worktable, can place the sheet metal in a suitable position and utilize the forming gap between the forming pressure roller and the forming groove to shape the center of the sheet metal into the required shape. Simultaneously, the synergistic action of the lower and side pressure blocks can control the bending and compression of the sheet metal ends, avoiding defects such as wrinkles. Driven by the moving block, the welding gun can weld along the precisely formed weld seam, greatly improving welding accuracy and quality, thereby ensuring the overall quality of the electric tricycle wheel hub steel rim, reducing rework and scrap due to quality problems, and improving production efficiency.

[0015] 2. The present invention, through the design of the upper pressing block and the inclined wall of the forming groove of the lower pressing block, enables the lower pressing block to slide towards the center of the pressure plate during the downward movement, which further avoids the wrinkling of the sheet material and improves the stability of the sheet material forming. Attached Figure Description

[0016] Figure 1 This is a first-view structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the second perspective structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the plate material of the present invention placed in the placement groove.

[0019] Figure 4 This is a cross-sectional view of the forming roller pressing the sheet into the forming groove according to the present invention.

[0020] Figure 5 This is a cross-sectional view of the side pressure block pressing against the plate in this invention.

[0021] Figure 6 This is an exploded view of the pressure block and pressure plate of the present invention.

[0022] Figure 7 This is a cross-sectional view of the pressing block pressing the plate according to the present invention.

[0023] Figure 8 For the present invention Figure 7 Enlarged view of point A.

[0024] In the picture: 1. Workbench; 101. Placement slot; 102. Forming slot; 1021. Inclined wall; 2. Lifting frame; 3. Forming pressure roller; 4. Lower pressure block; 401. Slider; 402. Pressing block; 5. Welding gun; 6. Pressure plate; 601. Slide groove; 602. Center groove; 7. First hydraulic cylinder; 8. Spring; 9. Second hydraulic cylinder; 10. Side pressure block; 11. Third hydraulic cylinder; 12. Fourth hydraulic cylinder; 13. Moving block; 14. Fixed stop block; 15. Movable stop block; 16. Motor; 17. Lead screw; 18. Guide wheel. Detailed Implementation

[0025] The present invention is illustrated below with specific embodiments, but these are not intended to limit the invention.

[0026] Example 1 like Figures 1-8 As shown in this embodiment, an electric tricycle wheel hub steel rim welding device is provided, including a workbench 1, on which a placement groove 101 for placing the sheet metal to be formed is provided; a forming groove 102 is provided on the workbench 1 and located below the middle of the placement groove 101, the bottom of the forming groove 102 is semi-circular, and the middle of the placement groove 101 is connected to the top of the forming groove 102; a lifting frame 2 is vertically slidable on the workbench 1, such as... Figure 2 As shown, a third hydraulic cylinder 11 is provided on the workbench 1. The output shaft of the third hydraulic cylinder 11 is connected to the lifting frame 2. When the third hydraulic cylinder 11 is running, the output shaft of the third hydraulic cylinder 11 drives the lifting frame 2 to move up or down. A forming pressure roller 3 is connected to the lifting frame 2 for pressing the plate in the placement groove 101 into the forming groove 102. The forming groove 102 has a U-shaped structure. The outer diameter of the forming pressure roller 3 is smaller than the size of the forming groove 102. When the forming pressure roller 3 moves down into the forming groove 102, that is, when the axis of the forming pressure roller 3 coincides with the axis of the bottom semi-circular shape of the forming groove 102, there is a forming gap between the forming pressure roller 3 and the forming groove 102. The forming gap is the same as the thickness of the plate. The middle part of the plate is formed in the forming gap. Two lower pressing blocks 4 are symmetrically distributed on both sides above the forming pressure roller 3 for pressing the two ends of the plate. The two lower pressing blocks 4 make the two ends of the plate adhere to the upper surface of the forming pressure roller 3. The two ends of the plate are connected above the forming pressure roller 3 to form a weld seam. A central groove 602 is provided in the middle of the pressure plate 6. A moving block 13 is slidably connected to the inside of the central groove 602 through a fourth hydraulic cylinder 12. A welding gun 5 is mounted on the moving block 13 and moves along the weld seam of the plate. The welding gun 5 is used to weld the weld seam. A recessed groove 301 is provided directly above the forming pressure roller 3, extending along its length.

[0027] A fixed stop 14 is provided at one end of the interior of the placement slot 101, and a movable stop 15 is provided at the other end; When the board is placed in the placement groove 101, the movable stop 15 pushes the board toward the fixed stop 14, so that the board is in the middle position of the placement groove 101.

[0028] The workbench 1 is located below the placement slot 101 and is rotatably connected to the lead screw 17 via the motor 16. The lower end of the movable stop 15 is engaged with the lead screw 17. When the motor 16 drives the lead screw 17 to rotate, the lead screw 17 moves closer to or further away from the fixed stop 14 along with the movable stop 15.

[0029] Guide wheels 18 are rotatably connected to both sides of the upper end of the forming groove 102 to reduce friction when the sheet metal is bent and deformed.

[0030] Example 2 Based on Embodiment 1, in this embodiment, in order to enable the lower pressure block 4 to press both ends of the sheet metal into contact with the surface of the forming pressure roller 3, specifically: A pressure plate 6 is slidably connected to the lifting frame 2 via a first hydraulic cylinder 7. The first hydraulic cylinder 7 is fixed on the lifting frame 2, and the output shaft of the first hydraulic cylinder 7 is connected to the side wall of the pressure plate 6. When the first hydraulic cylinder 7 is started, the output shaft of the first hydraulic cylinder 7 drives the pressure plate 6 to slide on the lifting frame 2. Two lower pressure blocks 4 are symmetrically arranged on the lower end face of the pressure plate 6. When the first hydraulic cylinder 7 drives the pressure plate 6 to move downward, the pressure plate 6 moves downward along with the two lower pressure blocks 4, thereby pressing the two ends of the sheet metal onto the surface of the forming pressure roller 3.

[0031] The lower surface of the pressing block 4 is arc-shaped, and the radius of the arc on the lower surface of the pressing block 4 is the same as the radius of the semi-circular bottom of the forming groove 102. When the forming roller 3 presses the middle part of the sheet into the forming groove 102, the two ends of the sheet are located directly below the arc-shaped lower surface of the lower pressing block 4 on the same side.

[0032] Both sides of the lower surface of the pressure plate 6 are provided with sliding grooves 601. A slider 401 is fixed to the upper end face of the lower pressure block 4. The slider 401 is slidably connected inside the sliding groove 601 on the same side. A spring 8 is provided inside the sliding groove 601 to spring open the two lower pressure blocks 4. Figure 6 As shown, spring 8 is set at one end of slide groove 601 near the middle of pressure plate 6. One end of spring 8 abuts against the side wall of slide groove 601 and the other end of spring 8 abuts against the side wall of slider 401. In its natural state, spring 8 slides the corresponding slider 401 toward the end of slide groove 601 away from the middle of pressure plate 6, that is, the lower pressure block 4 is pressed toward the end of pressure plate 6. The upper end of the forming groove 102 is provided with inclined walls 1021 on both sides, and the outer wall of the lower pressing block 4 is fixed with a pressing block 402. When the pressure plate 6 drives the two lower pressure blocks 4 to move downward, the abutting block 402 abuts against the inclined wall 1021 on the same side, so that the lower pressure block 4 can slide towards the middle of the pressure plate 6 to avoid the plate from wrinkling.

[0033] Example 3 Based on Embodiment 2, in this embodiment, when the forming roller 3 presses the sheet into the forming groove 102, in order to bend both ends of the sheet towards the center, specifically: Side pressure blocks 10 are symmetrically slidably connected to the worktable 1 on both sides of the forming groove 102 via the second hydraulic cylinder 9. The second hydraulic cylinder 9 is fixed on the worktable 1, and the output shaft of the second hydraulic cylinder 9 is connected to the side pressure block 10. When the second hydraulic cylinder 9 is running, the output shaft of the second hydraulic cylinder 9 drives the side pressure block 10 to slide closer to or further away from the forming groove 102. The end of the side pressure block 10 that is close to the forming groove 102 is arc-shaped, and the arc radius of the arc end face of the side pressure block 10 is the same as the radius of the semi-circular bottom of the forming groove 102. When the forming roller 3 presses the sheet into the forming groove 102, the side pressure block 10 presses against both sides of the sheet, causing the two ends of the sheet to bend toward the middle.

[0034] Operation process: First, the sheet material to be formed is placed in the placement slot 101 of the workbench 1. The motor 16 is started, driving the lead screw 17 to rotate. The lead screw 17, along with the movable stop 15, moves towards the fixed stop 14, pushing the sheet material to the middle position of the placement slot 101. Then, the third hydraulic cylinder 11 is started. The output shaft of the third hydraulic cylinder 11 drives the lifting frame 2 to move downward. The lifting frame 2 drives the forming pressure roller 3 to move downward. The forming pressure roller 3 presses the sheet material in the placement slot 101 into the forming slot 102, forming the middle of the sheet material in the forming gap. During this process, the guide rollers 18 on both sides of the upper end of the forming slot 102 reduce friction when the sheet material is bent and deformed.

[0035] Based on Embodiment 1, after the lifting frame 2 moves downward a certain distance, the first hydraulic cylinder 7 is activated. The output shaft of the first hydraulic cylinder 7 drives the pressure plate 6 to slide downward on the lifting frame 2. The pressure plate 6 moves downward along with the two lower pressure blocks 4, pressing the two ends of the plate onto the surface of the forming pressure roller 3. At the same time, the abutting block 402 on the lower pressure block 4 abuts against the inclined wall 1021 of the forming groove 102, driving the lower pressure block 4 to slide towards the center of the pressure plate 6 to prevent wrinkles from forming on the plate. Next, the fourth hydraulic cylinder 12 is activated, driving the moving block 13 to move within the central groove 602, which in turn moves the welding gun 5 along the welding seam of the plate to weld the seam.

[0036] Based on Example 2, when the forming roller 3 presses the plate into the forming groove 102 to a certain depth, the second oil cylinder 9 is activated. The output shaft of the second oil cylinder 9 drives the side pressure block 10 to slide towards the forming groove 102. The side pressure block 10 presses against both sides of the plate, causing the two ends of the plate to bend towards the middle, further ensuring the forming quality of the plate. Then, the welding operation is completed according to the steps of Example 2.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A welding device for the wheel hub steel rim of an electric tricycle, characterized in that, Includes a workbench (1), on which are provided; Placement slot (101) is provided on the workbench (1) for placing the sheet material to be formed; A forming groove (102) is provided on the workbench (1) and located below the middle part of the placement groove (101). The bottom of the forming groove (102) is semi-circular. The lifting frame (2) slides vertically on the worktable (1); A forming roller (3) is connected to a lifting frame (2) and is used to press the plate in the placement groove (101) into the interior of the forming groove (102); Two pressing blocks (4) are symmetrically distributed on both sides above the forming roller (3) to press the two ends of the plate so that the two ends of the plate are attached to the upper surface of the forming roller (3) and the two ends of the plate are connected to form a weld seam directly above the forming roller (3). Welding gun (5), which moves along the weld seam of the plate and is used to weld the weld seam.

2. The electric tricycle wheel hub steel rim welding device according to claim 1, characterized in that, The lifting frame (2) is slidably connected to a pressure plate (6) via a first oil cylinder (7), and two lower pressure blocks (4) are symmetrically arranged on the lower end face of the pressure plate (6); When the first oil cylinder (7) drives the pressure plate (6) to move downward, the pressure plate (6) moves downward with the two lower pressure blocks (4) to press the two ends of the plate onto the surface of the forming pressure roller (3).

3. The electric tricycle wheel hub steel rim welding device according to claim 2, characterized in that, The lower surface of the pressing block (4) is arc-shaped, and the radius of the arc of the lower surface of the pressing block (4) is the same as the radius of the semi-circular bottom of the forming groove (102); When the forming roller (3) presses the middle part of the plate into the forming groove (102), the two ends of the plate are located directly below the arc-shaped lower surface of the lower pressing block (4) on the same side.

4. The electric tricycle wheel hub steel rim welding device according to claim 3, characterized in that, The lower surface of the pressure plate (6) is provided with sliding grooves (601) on both sides. The upper end face of the lower pressure block (4) is fixed with a slider (401). The slider (401) is slidably connected to the inside of the sliding groove (601) on the same side. The sliding groove (601) is provided with a spring (8) for pressing and spreading the two lower pressure blocks (4). The upper end of the forming groove (102) is provided with inclined walls (1021) on both sides, and the outer wall of the lower pressing block (4) is fixed with a pressing block (402). When the pressure plate (6) drives the two lower pressure blocks (4) to move downward, the abutting block (402) abuts against the inclined wall (1021) on the same side, so that the lower pressure block (4) can slide toward the middle of the pressure plate (6).

5. The electric tricycle wheel hub steel rim welding device according to claim 4, characterized in that, Side pressure blocks (10) are symmetrically slidably connected to the workbench (1) and located on both sides of the forming groove (102) via the second oil cylinder (9). The side pressure block (10) has an arc shape at one end near the forming groove (102), and the arc radius of the arc end face of the side pressure block (10) is the same as the radius of the semi-circular bottom of the forming groove (102). When the forming roller (3) presses the sheet into the forming groove (102), the side pressure block (10) presses against both sides of the sheet, causing the two ends of the sheet to bend toward the middle.

6. The electric tricycle wheel hub steel rim welding device according to claim 2, characterized in that, The pressure plate (6) has a central groove (602) in the middle. The interior of the central groove (602) is slidably connected to a moving block (13) via a fourth oil cylinder (12). The welding gun (5) is mounted on the moving block (13).

7. The electric tricycle wheel hub steel rim welding device according to claim 6, characterized in that, A groove (301) is provided directly above the forming roller (3), and the groove (301) is in the length direction.

8. The electric tricycle wheel hub steel rim butt welding device according to claim 1, characterized in that, The placement slot (101) has a fixed stop (14) at one end and a movable stop (15) at the other end. When the board is placed in the placement slot (101), the movable stop (15) pushes the board toward the fixed stop (14) so ​​that the board is in the middle position of the placement slot (101).

9. The electric tricycle wheel hub steel rim welding device according to claim 8, characterized in that, The workbench (1) is located below the placement slot (101) and is rotatably connected to a lead screw (17) via a motor (16). The lower end of the movable stop (15) is engaged with the lead screw (17). When the motor (16) drives the lead screw (17) to rotate, the lead screw (17) moves closer to or further away from the fixed stop (14) with the movable stop (15).

10. The electric tricycle wheel hub steel rim butt welding device according to claim 1, characterized in that, Guide wheels (18) are rotatably connected to both sides of the upper end of the forming groove (102) to reduce friction when the plate is bent and deformed.

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