Motorcycle fuel tank shell welding tooling

Abstract

The utility model relates to the field of motorcycle oil tank laser welding discloses motorcycle oil tank shell welding frock, including base and sliding seat, be equipped with four groups of telescopic parts for driving sliding seat to move up and down on the base, each telescopic part around is provided with the guide assembly, the middle part of base is provided with the clamping assembly, and the clamping assembly includes the profiling block and the compression block, and the contour of profiling block top and compression block bottom all match with the oil tank shell contour, and the profiling block is installed in the middle part of base, the middle part of sliding seat forms the open slot, and the open slot both sides are all connected with the compression block, and the compression block can be close to or away from the profiling block in the sliding seat moving process, to clamp or loosen the oil tank shell, be provided with first stop piece and second stop piece on the profiling block, and first stop piece is located profiling block top, and second stop piece is located profiling block end, profiling block both ends are provided with first positioning piece and second positioning piece respectively. The utility model intends to solve the problem that the uneven pressure control leads to poor welding effect.

Description

Technical Field

[0001] This utility model relates to the field of laser welding of motorcycle fuel tanks, specifically to a welding fixture for the outer shell of a motorcycle fuel tank. Background Technology

[0002] As one of the core components of a motorcycle, the fuel tank not only fulfills the basic function of fuel storage, but its appearance also directly affects the overall visual appeal and brand identity of the motorcycle. Modern motorcycle fuel tank production typically begins with stamping sheet metal into two symmetrical or asymmetrical half-shell components. These two half-shells are then positioned, clamped, and welded together at their joint edges to form a complete, sealed container. In this process, the precision and quality of the welding directly determine the fuel tank's sealing performance, structural strength, and final appearance. Therefore, the welding fixtures used to fix and position the fuel tank half-shells are crucial.

[0003] Currently, most existing fixtures used for welding motorcycle fuel tank shells employ a fixed clamp structure. These fixtures typically include a base platform with positioning blocks conforming to the internal contours or external edges of the fuel tank, and a series of clamping mechanisms driven manually, pneumatically, or hydraulically. During operation, the operator places the stamped left and right fuel tank halves onto the positioning blocks, and then closes them using the clamping mechanisms, precisely aligning and fixing the two halves in the preset welding positions. A welder then performs the welding operation along the joint.

[0004] However, existing fixed welding fixtures still have several obvious drawbacks: Due to the complex shape of the oil tank, especially some structures with large angles or deep cavities, the clamping arms or blocks of existing fixtures often interfere with the movement path of the welding torch, resulting in poor welding accessibility and leaving incomplete or missed welds, requiring secondary welding and affecting the consistency of welding quality. Furthermore, some fixtures do not control the clamping force of the oil tank evenly. Manual clamps rely on the operator's experience to control the pressure, while pneumatic or hydraulic clamping mechanisms mostly provide a single pressure output, which cannot achieve differentiated clamping according to the welding requirements of different parts, easily causing damage to thin-walled parts or localized welding deformation. Utility Model Content

[0005] The present invention aims to provide a welding fixture for motorcycle fuel tank shells to solve the problem of poor welding effect caused by uneven clamping force control.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A welding fixture for a motorcycle fuel tank casing includes a base and a slide. The base has four sets of telescopic components for driving the slide to move up and down, and each telescopic component has a guide assembly next to it. A clamping assembly is located in the middle of the base, which includes a contour block and a pressing block. The contours of the top of the contour block and the bottom of the pressing block match the contour of the fuel tank casing. The contour block is installed in the middle of the base. An opening groove is formed in the middle of the slide, and pressing blocks are connected to both sides of the opening groove. The pressing blocks can move closer to or away from the contour block during the movement of the slide to clamp or release the fuel tank casing. A first limiting member and a second limiting member are provided on the contour block. The first limiting member is located at the top of the contour block, and the second limiting member is located at the end of the contour block. A first positioning member and a second positioning member are respectively provided at both ends of the contour block.

[0007] The principles and advantages of this solution: 1. The tooling uses a three-stage positioning and clamping mechanism to fix the workpiece: initial positioning, precise fitting, and limiting reinforcement. First, the first and second positioning parts at both ends of the contour block provide initial support and positioning for the semi-finished fuel tank shell, guiding the workpiece contour to align with the top contour of the contour block. Then, the slide descends, causing the clamping block to approach the contour block, and the design of both parts matching the contour of the fuel tank shell forms a complete fitting and clamping. Finally, the first and second limiting parts on the contour block cooperate with the clamping block's adaptable structure to achieve dual limiting of the tooling and the workpiece, preventing workpiece displacement during welding.

[0008] 2. The top contour of the contour block and the bottom contour of the clamping block are adapted to the contour of the tank shell. When clamped, the tooling can fully fit the workpiece surface, which not only avoids excessive local force causing workpiece deformation, but also achieves precise positioning of the workpiece through contour fitting, ensuring that the part of the workpiece to be welded is always in the preset welding position, thus improving welding accuracy.

[0009] 3. The opening groove in the middle of the slide provides a dedicated operating channel for the welding torch. Its structural design is precisely matched with the welding requirements, ensuring that the welding torch can be smoothly inserted into the tooling to cover the welding part of the tank shell, while avoiding interference with the tooling components and ensuring smooth welding operations.

[0010] 4. The guide components and telescopic parts are evenly distributed around the base. When the slide is raised or lowered, the guide rod moves along the guide seat groove, which can accurately constrain the movement trajectory of the slide and effectively prevent the slide from shifting or tilting due to uneven force. The guiding action, combined with the cylinder drive, further improves the stability of the slide's raising and lowering, ensures the alignment accuracy of the clamping block and the contour block, and reduces the risk of workpiece clamping deviation caused by slide offset.

[0011] Preferably, as an improvement, a welding groove is formed in the middle of the contour block, and the welding groove matches the top contour of the contour block, and the first limiting member and the second limiting member are both vertically installed on the welding groove.

[0012] Beneficial effects: The welding groove on the contour block matches the top contour, allowing the workpiece to be precisely embedded in the groove, providing a clear operating benchmark for welding operations and avoiding deviations in the welding position; the first and second limiting components are located at the top and end of the contour block, respectively, which can further limit the workpiece to prevent it from shifting during welding, and can also cooperate with the limiting groove of the clamping block to achieve the alignment of the tooling itself, improving clamping accuracy.

[0013] Preferably, as an improvement, the contour block also has a weight reduction opening.

[0014] Beneficial effects: The two weight-reducing ports effectively reduce the overall weight of the contour block without affecting its support strength and positioning accuracy, thereby reducing the load on the base and telescopic components and extending the service life of drive components such as cylinders. At the same time, the overall weight of the tooling is reduced, making it easier to install, debug and maintain, and improving the economic efficiency of tooling use.

[0015] Preferably, as an improvement, the clamping block has a first limiting groove and a second limiting groove formed thereon, the first limiting groove and the second limiting groove being located above the first limiting member and the second limiting member, respectively.

[0016] Beneficial effects: The limiting groove and the limiting component of the contour block are precisely matched. When clamping, the limiting component is embedded in the limiting groove, which completely solves the interference problem between the clamping block and the limiting component and ensures that the clamping action is smooth. At the same time, the cooperation between the limiting groove and the limiting component forms a secondary positioning, which further improves the alignment accuracy of the clamping block and the contour block.

[0017] Preferably, as an improvement, the contour block is mounted on the base by an extension block, and the length of the extension block is less than the length of the contour block. The first positioning member and the second positioning member are both located below the contour block, and the first positioning member is mounted obliquely on the base, while the second positioning member is mounted vertically on the base.

[0018] Beneficial effects: The heightening block creates a gap between the contour block and the base, providing installation space for the first and second positioning components; the inclined first positioning component cooperates with the vertically installed second positioning component to form multi-directional support and positioning for the corresponding position on the tank shell through the positioning rod, which can quickly achieve the initial positioning of the workpiece, ensure that the workpiece contour fits the top contour of the contour block, reduce the operation time of loading and positioning, and improve processing efficiency; multi-directional positioning also reduces the probability of workpiece offset when placed.

[0019] Preferably, as an improvement, both the first positioning member and the second positioning member include a connecting rod and positioning rods disposed at both ends of the connecting rod. The connecting rod is located below the contour block, and the positioning rods are used to support and position the outer shell of the oil tank.

[0020] Beneficial effects: The connecting rod is located below the contour block, which cleverly utilizes the space between the contour block and the base. This avoids collisions and interference between the connecting rod and moving parts such as the slide and clamping block during the opening and closing of the fixture, and also does not occupy the workpiece placement space on top of the contour block. This makes the layout of each component of the fixture more compact and reasonable, and improves the coordination of the structure's operation.

[0021] Preferably, as an improvement, each guide component includes a guide seat and a guide rod. The guide seat is mounted on the base, one end of the guide rod is connected to the slide, and the other end moves along a groove provided in the middle of the guide seat during the movement of the slide.

[0022] Beneficial effects: The guide components are located around the base and work in conjunction with four sets of telescopic components to form a balanced guiding support force from multiple directions of the slide. This distributed layout can effectively disperse the lateral force generated when the slide is raised and lowered, reduce the load on individual guide components, avoid wear or deformation of local structures due to concentrated force, and further improve the stability and smoothness of the slide movement.

[0023] Preferably, as an improvement, the opening groove includes a first opening, a second opening, and a third opening that are interconnected, and the widths are arranged from largest to smallest as the first opening, the third opening, and the second opening.

[0024] Beneficial effects: The first and third openings are relatively large, providing ample operating space for the welding gun to weld the tail end of the oil tank shell, facilitating flexible adjustment of the welding gun's angle and position to ensure proper welding at the tail end; the width of the second opening is consistent with the size of the welding gun, providing precise guidance for the welding gun's movement trajectory and ensuring the accuracy of the welding path; it achieves comprehensive coverage of all parts of the workpiece to be welded, avoiding welding omissions or quality defects due to insufficient operating space. Attached Figure Description

[0025] Figure 1 This is a front view of an embodiment of the present utility model.

[0026] Figure 2 This is a left view of an embodiment of the present utility model.

[0027] Figure 3 This is a right view of an embodiment of the present utility model.

[0028] Figure 4 This is a structural schematic diagram of an embodiment of the present utility model.

[0029] Figure 5 This is a schematic diagram of the contour block in an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the clamping block in an embodiment of the present invention.

[0031] The reference numerals in the accompanying drawings include: base 1, slide 2, opening slot 21, clamping assembly 3, contour block 31, welding groove 311, limiting member 312, second limiting member 313, weight reduction port 314, pressing block 32, first limiting groove 321, second limiting groove 322, telescopic member 4, guide assembly 5, guide seat 51, guide rod 52, first positioning member 6, and second positioning member 7. Detailed Implementation

[0032] The following detailed description illustrates the specific implementation method: The implementation examples are basically as follows Figures 1-3 As shown: like Figure 1 As shown, this embodiment provides a welding fixture for motorcycle fuel tank shells, used to weld pre-cut semi-finished fuel tank shells. The fixture includes a base 1 and a slide 2. The base 1 is provided with four sets of telescopic components 4 for driving the slide 2 to move up and down. Specifically, the telescopic component 4 is a cylinder. The bottom of the cylinder is connected to the base 1 by bolts. The suspended end of the piston rod in the cylinder is welded to the slide 2 so that when the piston rod moves up and down along the height direction of the base 1, it can drive the slide 2 to move. Guide components 5 are provided next to each telescopic component 4, and the guide components 5 and telescopic components 4 are evenly distributed around the base 1. Each guide component 5 includes a guide seat 51 and a guide rod 52. The guide seat 51 is installed on the base 1 by long bolts. One end of the guide rod 52 is welded to the slide 2, and the other end moves along the groove provided in the middle of the guide seat 51 during the up and down movement of the slide 2.

[0033] like Figure 2 and Figure 3 As shown, a clamping assembly 3 is provided in the middle of the base 1. The clamping assembly 3 includes a contour block 31 and a pressing block 32. The contours of the top of the contour block 31 and the bottom of the pressing block 32 match the contour of the fuel tank shell. The contour block 31 is installed in the middle of the base 1 by a heightening block. The heightening block is welded to the base 1, and the length of the heightening block is less than the length of the contour block 31, so that a gap is formed between the contour block 31 and the base 1. The first positioning member 6 and the second positioning member 7 at both ends of the contour block 31 are located within this gap. The first positioning member 6 is installed obliquely on the base 1, and the second positioning member 7 is installed vertically on the base 1. Specifically, the first positioning member 6 and the second positioning member 7 each include a connecting rod and positioning rods provided at both ends of the connecting rod. The connecting rod passes through the gap and is welded to the positioning rods at both ends. The positioning rods are used to support and position the fuel tank shell.

[0034] like Figure 5As shown, a welding groove 311 is formed in the middle of the contour block 31, and the welding groove 311 matches the top contour of the contour block 31. A first limiting member 312 and a second limiting member 313 are also provided on the contour block 31. Both the first limiting member 312 and the second limiting member 313 are vertically welded to the welding groove 311, with the first limiting member 312 located at the top of the contour block 31 and the second limiting member 313 located at the end of the contour block 31. To reduce the weight of the contour block 31, in this embodiment, two weight-reducing openings 314 are also formed on the contour block 31.

[0035] like Figure 4 As shown, an opening groove 21 is formed in the middle of the slide 2. The opening groove 21 includes a first opening, a second opening and a third opening that are interconnected. In order to facilitate the welding gun to be inserted into the tooling when welding the tail end of the outer shell, the first opening is larger than the third opening, the third opening is larger than the second opening, and the width of the second opening is the same as the size of the welding gun. In order to prevent the shell of the welding gun from interfering with the side wall of the second opening, in this embodiment, the side wall of the second opening is set to be inclined.

[0036] like Figure 6 As shown, clamping blocks 32 are bolted to both sides of the opening slot 21. The clamping blocks 32 can move closer to or further away from the contour block 31 during the movement of the slide block 2 to clamp or loosen the oil tank shell. To prevent the clamping blocks 32 from interfering with the first limiting member 312 and the second limiting member 313 when clamping the oil tank shell, the clamping blocks 32 are provided with a first limiting groove 321 and a second limiting groove 322. The first limiting groove 321 and the second limiting groove 322 are located above the first limiting member 312 and the second limiting member, respectively.

[0037] The process of using the above solution is as follows: 1. Initial state preparation: The telescopic parts 4 around the control base 1 are in the retracted state, which drives the slide 2 to move upward to the highest position. At this time, the clamping block 32 at the bottom of the slide 2 is separated from the contour block 31 in the middle of the base 1, and the tooling is in the open state ready for loading.

[0038] 2. Workpiece positioning and placement: Place the cut semi-finished oil tank shell on top of the contour block 31. Use the first positioning piece 6 and the second positioning piece 7 between the two ends of the contour block 31 for initial positioning. Use the positioning rod to support the corresponding position of the oil tank shell, ensuring that the outline of the oil tank shell fits the top outline of the contour block 31. At the same time, align the welding part of the oil tank shell with the welding groove 311 in the middle of the contour block 31.

[0039] 3. Clamping and fixing the workpiece: Activate the cylinder to control the piston rod to extend downwards, causing the slide block 2 to move along the guide rod 52 towards the base 1. As the slide block 2 descends, the clamping block 32 gradually approaches the contour block 31 until the bottom of the clamping block 32 is in contact with the top of the oil tank shell and applies pressure, clamping the oil tank shell between the contour block 31 and the clamping block 32. During this process, the first limiting member 312 and the second limiting member 313 on the contour block 31 are respectively embedded in the first limiting groove 321 and the second limiting groove 322 of the clamping block 32, avoiding interference between the two and further improving the clamping accuracy.

[0040] 4. Welding Operation: The robotic arm welding torch extends into the tooling through the opening slot 21 in the middle of the slide block 2 to perform welding. When welding the tail end of the fuel tank shell, the larger first opening provides sufficient operating space for the welding torch; during welding, the welding torch can move along the second opening, and the inclined sidewall of the second opening effectively prevents interference between the welding torch shell and the sidewall, and the width of the second opening is adapted to the size of the welding torch to ensure the accuracy of the welding path; the third opening adapts to the operational requirements of different welding stages, ensuring that all parts of the shell to be welded can be effectively welded.

[0041] 5. Workpiece Removal: After welding is completed, the cylinder is retracted again, and the piston rod moves the slide 2 upward. The clamping block 32 moves away from the contour block 31 along with the slide 2, and the fixture returns to the open state. At this time, the welded tank shell can be directly removed, completing a single welding operation. The above steps can be repeated for the processing of the next workpiece.

[0042] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A welding fixture for a motorcycle fuel tank casing, characterized in that: The device includes a base and a slide. The base has four sets of telescopic components for driving the slide to move up and down, and each telescopic component has a guide assembly next to it. A clamping assembly is located in the middle of the base. The clamping assembly includes a contour block and a pressing block. The contours of the top of the contour block and the bottom of the pressing block match the contour of the fuel tank shell. The contour block is installed in the middle of the base. An opening groove is formed in the middle of the slide. Pressing blocks are connected to both sides of the opening groove. The pressing blocks can move closer to or away from the contour block during the movement of the slide to clamp or release the fuel tank shell. A first limiting member and a second limiting member are provided on the contour block. The first limiting member is located at the top of the contour block, and the second limiting member is located at the end of the contour block. A first positioning member and a second positioning member are respectively provided at both ends of the contour block.

2. The welding fixture for the motorcycle fuel tank casing according to claim 1, characterized in that: A welding groove is formed in the middle of the contour block, and the welding groove matches the top contour of the contour block. The first and second limiting members are both vertically installed on the welding groove.

3. The welding fixture for the motorcycle fuel tank casing according to claim 2, characterized in that: Weight reduction openings are also formed on the contour block.

4. The welding fixture for the motorcycle fuel tank casing according to claim 1, characterized in that: The clamping block has a first limiting groove and a second limiting groove, which are located above the first limiting member and the second limiting member, respectively.

5. The welding fixture for the motorcycle fuel tank casing according to claim 1, characterized in that: The contour block is mounted on the base by an extension block, and the length of the extension block is less than the length of the contour block. The first positioning component and the second positioning component are both located below the contour block, with the first positioning component mounted at an angle on the base and the second positioning component mounted vertically on the base.

6. The welding fixture for the motorcycle fuel tank casing according to claim 5, characterized in that: Both the first and second positioning components include a connecting rod and positioning rods at both ends of the connecting rod. The connecting rod is located below the contour block, and the positioning rods are used to support and position the outer shell of the oil tank.

7. The welding fixture for the motorcycle fuel tank casing according to claim 1, characterized in that: Each guide assembly includes a guide seat and a guide rod. The guide seat is mounted on the base, one end of the guide rod is connected to the slide, and the other end moves along the groove set in the middle of the guide seat during the movement of the slide.

8. The welding fixture for the motorcycle fuel tank casing according to claim 1, characterized in that: The opening groove includes a first opening, a second opening, and a third opening that are interconnected, and their widths are arranged from largest to smallest as the first opening, the third opening, and the second opening.

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