Roll welding device for inner and outer tank shells

Abstract

The present application relates to the technical field of roll welding equipment, and discloses a roll welding device for an inner shell and an outer shell of an oil tank, which comprises a rack, a welding assembly and a clamping assembly, the welding assembly is arranged on the rack, the clamping assembly comprises a base, a fixed seat, a moving seat, a cylinder, a rotary motor, a first clamping seat and a second clamping seat, the moving seat is driven to move towards the fixed seat by the cylinder, the second clamping seat is driven to move close to the first clamping seat, so that the combined part of the inner shell and the outer shell of the oil tank is clamped between the first clamping seat and the second clamping seat, and the to-be-welded flange of the oil tank is located in the welding working area of the welding assembly, the second clamping seat is driven to rotate by the rotary motor, the clamped oil tank is driven to rotate as a whole, the flange of the oil tank continuously passes through the welding working area of the welding assembly, and thus the continuous roll welding of the full-perimeter weld of the oil tank is completed, welding quality fluctuation caused by uneven manual rotation speed is avoided, labor intensity is reduced, and production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of roll welding equipment technology, and in particular to a roll welding device for the inner shell and outer shell of an oil tank. Background Technology

[0002] Motorcycle fuel tanks are typically made by stamping an inner shell and an outer shell, then joining the inner and outer shells together and performing resistance roll welding (seam welding) along the perimeter to ensure the fuel tank's airtightness. During the roll welding process, the flange of the fuel tank needs to continuously pass between two roll welding electrodes to form a continuous sealing weld.

[0003] Currently, the common method of roll welding involves operators manually rotating the oil tank, causing the flanges to pass sequentially over the welding electrodes. This manual rotation method has significant drawbacks: firstly, it is difficult to maintain a uniform rotation speed, resulting in inconsistent heating times for different sections of the weld, uneven weld nugget size, poor weld quality stability, and a tendency to produce incomplete welds or overheating; secondly, manual operation is labor-intensive, has low production efficiency, and can easily lead to fatigue over long periods of operation. It is also difficult to control the pause time at the beginning and end of the weld, which can easily cause defects such as crater cracks or incomplete penetration, directly affecting the airtightness of the oil tank. Summary of the Invention

[0004] The purpose of this invention is to provide a roll welding device for the inner shell and outer shell of an oil tank, which solves the problems of unstable welding quality and high labor intensity caused by manually rotating the oil tank in the prior art.

[0005] To achieve the above objectives, the present invention provides a roll welding device for an inner shell and an outer shell of an oil tank, including a frame, a welding assembly, and a clamping assembly. The welding assembly is disposed on the frame. The clamping assembly includes a base, a fixed seat, a movable seat, a cylinder, a rotary motor, a first clamping seat, and a second clamping seat. The base is fixedly connected to the frame and located on one side of the frame. The fixed seat is fixedly connected to the base and disposed on the base. The movable seat is slidably connected to the base and disposed on the base. The cylinder is connected to the base, and the output end of the cylinder passes through the base and is connected to the movable seat. The first clamping seat is rotatably connected to the fixed seat and located on one side of the fixed seat. The second clamping seat is rotatably connected to the movable seat and located on the side of the movable seat close to the first clamping seat. The rotary motor is connected to the movable seat, and the output end of the rotary motor is connected to the second clamping seat.

[0006] The first clamping seat includes a first turntable and a first base body. The first turntable is rotatably connected to the fixed base, and the first base body is connected to the first turntable.

[0007] The second clamping seat includes a second turntable and a second base body. The second turntable is rotatably connected to the movable base and connected to the output end of the rotary motor. The second base body is connected to the second turntable.

[0008] The clamping assembly further includes a first guide rod, which is fixedly connected to the base and slidably connected to the movable seat, and passes through the movable seat.

[0009] The welding assembly includes a housing, mounting bases, electrode wheels, a drive component, and an adjustment component. The adjustment component is mounted on the frame. The housing is slidably connected to the frame via the adjustment component. Two mounting bases are provided, slidably connected to the housing and located inside the housing. Two electrode wheels are provided, rotatably connected to the two mounting bases respectively. The drive component is mounted on the housing.

[0010] The driving component includes a bidirectional screw and a drive motor. The bidirectional screw is rotatably connected to the housing and threadedly connected to the two mounting seats, and the bidirectional screw passes through the two mounting seats. The drive motor is connected to the housing, and the output end of the drive motor is connected to the bidirectional screw.

[0011] The adjusting component includes a telescopic rod, a lifting seat, a fixed rod, and a floating component. The fixed rod is fixedly connected to the frame and located inside the frame. The lifting seat is slidably connected to the fixed rod and is sleeved on the fixed rod. The telescopic rod is connected to the lifting seat and to the outer shell. The floating component is disposed on the fixed rod.

[0012] This invention discloses a roll welding device for the inner and outer shells of an oil tank. During operation, the assembled inner and outer shells are placed between a first clamping seat and a second clamping seat. A cylinder is activated to drive a movable seat to slide towards a fixed seat, bringing the second clamping seat closer to the first clamping seat and clamping the oil tank. Subsequently, a rotary motor is started, driving the second clamping seat to rotate, causing the entire oil tank to rotate. The first clamping seat passively rotates on the fixed seat. During the rotation of the oil tank, the welding assembly performs roll welding on the flanges continuously passing through its working area, thereby completing the one-time automatic welding of the entire perimeter of the oil tank. This device automatically drives the oil tank to rotate at a uniform speed via a rotary motor, replacing the traditional manual rotation method. This not only ensures consistent heating time and stable welding quality across all sections of the weld but also significantly reduces the labor intensity of operators, improves production efficiency, and avoids defects such as arc craters that are easily generated at the start and end points of the weld during manual rotation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the overall structure of the roll welding device for the inner and outer shells of the fuel tank according to the first embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the installation structure of the first and second seats according to the first embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the floating component according to the second embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the installation structure of the electric actuator according to the second embodiment of the present invention.

[0018] Figure 5 This is the second embodiment of the present invention. Figure 4 Enlarged view of point A.

[0019] In the diagram: 101-Frame, 102-Welding assembly, 103-Clamping assembly, 104-Base, 105-Fixed seat, 106-Moving seat, 107-Cylinder, 108-Rotary motor, 109-First clamping seat, 110-Second clamping seat, 111-First turntable, 112-First seat body, 113-Second turntable, 114-Second seat body, 115-First guide rod, 201-Outer shell, 202-Mounting seat, 203-Electrode wheel, 204-Drive component, 205-Adjusting component, 206-Bidirectional screw, 207-Drive motor, 208-Telescopic rod, 209-Lifting seat, 210-Fixed rod, 211-Floating component, 212-Shell, 213-Rod body, 214-Electric push rod, 215-Spring, 216-Adjusting knob, 217-Second guide rod. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] First embodiment: Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the overall structure of the roll welding device for the inner and outer shells of the fuel tank according to the first embodiment of the present invention. Figure 2This is a schematic diagram of the installation structure of the first and second seats according to the first embodiment of the present invention. The present invention provides a roll welding device for the inner and outer shells of an oil tank, including a frame 101, a welding assembly 102, and a clamping assembly 103. The clamping assembly 103 includes a base 104, a fixed seat 105, a movable seat 106, a cylinder 107, a rotary motor 108, a first clamping seat 109, and a second clamping seat 110. The cylinder 107 drives the movable seat 106 to move the second clamping seat 110 closer to the first clamping seat 109 to clamp the oil tank. Then, the rotary motor 108 drives the second clamping seat 110 to rotate the entire oil tank. This solves the problem of unstable welding quality and high labor intensity caused by manual rotation of the oil tank in the prior art. It can be understood that the above solution can be used in production scenarios where continuous roll welding of thin-walled containers such as oil tanks is performed.

[0022] In this specific embodiment, the base 104 is fixedly connected to the frame 101 and located on one side of the frame 101; the fixed seat 105 is fixedly connected to the base 104 and disposed on the base 104; the movable seat 106 is slidably connected to the base 104 and disposed on the base 104; the cylinder 107 is connected to the base 104, and the output end of the cylinder 107 passes through the base 104 and is connected to the movable seat 106; the first clamping seat 109 is rotatably connected to the fixed seat 105 and located on one side of the fixed seat 105; the second clamping seat 110 is rotatably connected to the movable seat 106 and located on the side of the movable seat 106 near the first clamping seat 109; the rotary motor 108 is connected to the movable seat 106, and the output end of the rotary motor 108 is connected to the second clamping seat 110.

[0023] The welding assembly 102 is used for roll welding of the assembly of the inner shell and outer shell 201 of the fuel tank. The first clamping seat 109 and the second clamping seat 110 are arranged opposite to each other. The cylinder 107 drives the moving seat 106 to move towards the fixed seat 105, which moves the second clamping seat 110 closer to the first clamping seat 109, thereby clamping the assembly of the inner shell and outer shell 201 of the fuel tank between the first clamping seat 109 and the second clamping seat 110, and placing the flange of the fuel tank to be welded in the welding working area of ​​the welding assembly 102; the cylinder 107 drives the moving seat 106 to move towards the fixed seat 105, thereby moving the second clamping seat 110 closer to the first clamping seat 109, thereby clamping the assembly of the inner shell and outer shell 201 between the first clamping seat 109 and the second clamping seat 110, and placing the flange of the fuel tank to be welded in the welding working area of ​​the welding assembly 102; the cylinder 102 ... The rotary motor 108 drives the second clamping seat 110 to rotate, causing the clamped oil tank to rotate as a whole. At this time, the first clamping seat 109 rotates passively with the oil tank, and the flange of the oil tank continuously passes through the welding working area of ​​the welding assembly 102, thereby completing the continuous roll welding of the weld seam around the entire perimeter of the oil tank. By driving the oil tank to rotate at a uniform speed through the rotary motor 108 to replace manual rotation, the flange continuously and stably passes through the welding assembly 102, realizing continuous and uniform roll welding of the weld seam, avoiding the welding quality fluctuations caused by uneven manual rotation speed, while reducing labor intensity and improving production efficiency.

[0024] The first clamping seat 109 includes a first turntable 111 and a first seat 112. The first turntable 111 is rotatably connected to the fixed seat 105, and the first seat 112 is connected to the first turntable 111. The shape of the first seat 112 matches the inner contour of the oil tank and is detachably mounted on the first turntable 111 by bolts, so that the corresponding first seat 112 can be replaced according to different models of oil tanks.

[0025] Secondly, the second clamping seat 110 includes a second turntable 113 and a second seat 114. The second turntable 113 is rotatably connected to the movable seat 106 and connected to the output end of the rotary motor 108. The second seat 114 is connected to the second turntable 113. The shape of the second seat 114 matches the outer contour of the oil tank and is also detachably mounted on the second turntable 113 by bolts. It cooperates with the first seat 112 to achieve adaptive clamping for different oil tanks.

[0026] Meanwhile, the clamping assembly 103 also includes a first guide rod 115, which is fixedly connected to the base 104 and slidably connected to the movable seat 106, and passes through the movable seat 106; the first guide rod 115 is used to guide the movable seat 106 to slide in a straight line, ensuring that the second clamping seat 110 remains aligned with the first clamping seat 109 during the clamping process, and avoids displacement.

[0027] Second embodiment: Based on the first embodiment, please refer to Figures 3 to 5 , Figure 3 This is a schematic diagram of the structure of the floating component according to the second embodiment of the present invention. Figure 4 This is a schematic diagram of the installation structure of the electric actuator according to the second embodiment of the present invention. Figure 5 This is the second embodiment of the present invention. Figure 4 Enlarged view at point A. The welding assembly 102 in this embodiment includes a housing 201, a mounting base 202, an electrode wheel 203, a driving component 204, and an adjusting component 205.

[0028] In this specific embodiment, the adjusting member 205 is disposed on the frame 101; the outer shell 201 is slidably connected to the frame 101 via the adjusting member 205; two mounting seats 202 are disposed, and the two mounting seats 202 are slidably connected to the outer shell 201 and located inside the outer shell 201; two electrode wheels 203 are disposed, and the two electrode wheels 203 are rotatably connected to the two mounting seats 202 respectively; the driving member 204 is disposed on the outer shell 201; the two electrode wheels 203 are rotatably connected to the corresponding mounting seats 202 via bearings, and each electrode wheel 203 is electrically connected to an external welding transformer (not shown in the figure) via a flexible conductive copper strip. One end of the flexible conductive copper strip is fixed to the mounting seat 202 or the outer shell 201, and the other end is in electrical contact with the rotating shaft of the electrode wheel 203 to ensure that the electrode wheel 203 continuously receives welding current during rotation.

[0029] The driving component 204 includes a bidirectional screw 206 and a drive motor 207. The bidirectional screw 206 is rotatably connected to the housing 201 and threadedly connected to two mounting seats 202, with the bidirectional screw 206 passing through both mounting seats 202. The drive motor 207 is connected to the housing 201, and its output end is connected to the bidirectional screw 206. The threads on both sides of the bidirectional screw 206 are in opposite directions. The two mounting seats 202 are disposed on both sides of the bidirectional screw 206. The drive motor 207 drives the bidirectional screw 206 to rotate, causing the two mounting seats 202 to move synchronously in opposite directions within the housing 201, thereby adjusting the distance between the two electrode wheels 203 to accommodate oil tanks of different thicknesses or to adjust welding pressure.

[0030] Secondly, the adjusting component 205 includes a telescopic rod 208, a lifting seat 209, a fixed rod 210, and a floating component 211. The fixed rod 210 is fixedly connected to the frame 101 and located inside the frame 101. The lifting seat 209 is slidably connected to the fixed rod 210 and is sleeved on the fixed rod 210. The telescopic rod 208 is connected to the lifting seat 209 and to the outer shell 201. The floating component 211 is disposed on the fixed rod 210. The adjusting component 205 is used to enable the entire welding assembly 102 to move up and down and maintain elastic floating, so that the electrode wheel 203 can adapt to the height change of the oil tank flange. The telescopic rod 208 can extend and retract to drive the outer shell 201 to approach or move away from the clamping assembly 103, so that the electrode wheel 203 moves to the working position in contact with the oil tank flange during welding and retracts to avoid collision during clamping and unloading.

[0031] Meanwhile, the telescopic rod 208 includes a housing 212, a rod body 213, and an electric actuator 214. The housing 212 is fixedly connected to the lifting seat 209 and is located on one side of the lifting seat 209. The rod body 213 is slidably connected to the housing 212 and fixedly connected to the outer shell 201. The electric actuator 214 is connected to the housing 212 and is located inside the housing 212. The output end of the electric actuator 214 is connected to the rod body 213. The electric actuator 214 is used to drive the rod body 213 to extend or retract from the housing 212, thereby driving the outer shell 201 to move horizontally, so that the electrode wheel 203 approaches or moves away from the welding position of the oil tank.

[0032] In addition, the floating component 211 includes a spring 215 and an adjusting knob 216. Two floating components 211 are provided and located on the upper and lower sides of the lifting seat 209. The adjusting knob 216 is threadedly connected to the fixed rod 210 and is sleeved on the fixed rod 210. The two ends of the spring 215 are in contact with the lifting seat 209 and the adjusting knob 216 respectively, and the spring 215 is sleeved on the fixed rod 210. The spring 215 in the two floating components 211 applies downward and upward preload to the lifting seat 209. By rotating the two adjusting knobs 216, the compression of the corresponding spring 215 can be changed respectively, thereby setting the balance position and floating sensitivity of the lifting seat 209 on the fixed rod 210. When the height of the oil tank flange changes, the electrode wheel 203 drives the outer shell 201 and the lifting seat 209 to move up and down against the force of the spring 215, so that the electrode wheel 203 always keeps in close contact with the flange with a roughly constant pressure, realizing adaptive floating welding.

[0033] Finally, a second guide rod 217 is also installed inside the frame 101. The second guide rod 217 is fixedly connected to the frame 101 and slidably connected to the lifting seat 209, and the second guide rod 217 passes through the lifting seat 209. The second guide rod 217 guides the lifting of the lifting seat 209, thereby improving the stability of the lifting seat 209 during lifting.

[0034] In operation, the roll welding device for the inner and outer shells of the oil tank of the present invention first replaces the first base 112 and the second base 114 according to the oil tank model, and adjusts the drive motor 207 to move the two mounting seats 202 driven by the bidirectional screw 206, adjusting the distance between the two electrode wheels 203 to match the flange thickness; then, the electric push rod 214 is activated, causing the rod body 213 to extend and push the outer shell 201 towards the clamping assembly 103 side, so that the two electrode wheels 203 are located on the upper and lower sides of the flange; then, by rotating the upper and lower adjustment knobs 216, the balance position of the lifting seat 209 and the preload of the spring 215 are set. When the cylinder 107 clamps the oil tank and the rotary motor 108 drives the oil tank to rotate, the flange continuously passes between the two electrode wheels 203. If there is a slight fluctuation in the flange height, the lifting seat 209 will slide up and down along the fixed rod 210, compressing or releasing the corresponding spring 215, so that the electrode wheels 203 are always close to the flange, realizing adaptive floating welding. This device not only replaces manual rotation, ensuring weld uniformity and airtightness, but also, through the adjustable spacing of the electrode wheels 203, controllable horizontal advance and retreat, and elastic floating design, it can quickly adapt to oil tank models with different thicknesses and curved contours, making it easy to change models and maintaining constant welding pressure, further improving the stability of welding quality and the versatility of the equipment.

[0035] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A roll welding device for an inner and outer shell of a fuel tank, comprising a frame, characterized in that, It also includes a welding assembly and a clamping assembly, the welding assembly being mounted on the frame; The clamping assembly includes a base, a fixed seat, a movable seat, a cylinder, a rotary motor, a first clamping seat, and a second clamping seat. The base is fixedly connected to the frame and located on one side of the frame. The fixed seat is fixedly connected to the base and disposed on the base. The movable seat is slidably connected to the base and disposed on the base. The cylinder is connected to the base, and its output end passes through the base and is connected to the movable seat. The first clamping seat is rotatably connected to the fixed seat and located on one side of the fixed seat. The second clamping seat is rotatably connected to the movable seat and located on the side of the movable seat closer to the first clamping seat. The rotary motor is connected to the movable seat, and its output end is connected to the second clamping seat.

2. The roll welding device for the inner and outer shells of the fuel tank as described in claim 1, characterized in that, The first clamping seat includes a first turntable and a first base body. The first turntable is rotatably connected to the fixed base, and the first base body is connected to the first turntable.

3. The roll welding device for the inner and outer shells of the fuel tank as described in claim 1, characterized in that, The second clamping seat includes a second turntable and a second base body. The second turntable is rotatably connected to the movable base and connected to the output end of the rotary motor. The second base body is connected to the second turntable.

4. The roll welding device for the inner and outer shells of the fuel tank as described in claim 1, characterized in that, The clamping assembly further includes a first guide rod, which is fixedly connected to the base and slidably connected to the movable seat, and passes through the movable seat.

5. The roll welding device for the inner and outer shells of the fuel tank as described in claim 1, characterized in that, The welding assembly includes a housing, a mounting base, an electrode wheel, a drive component, and an adjustment component. The adjustment component is mounted on the frame. The housing is slidably connected to the frame via the adjustment component. Two mounting bases are provided, slidably connected to the housing and located inside the housing. Two electrode wheels are provided, and the two electrode wheels are rotatably connected to the two mounting bases respectively; The drive component is disposed on the housing.

6. The roll welding device for the inner and outer shells of the fuel tank as described in claim 5, characterized in that, The driving component includes a bidirectional screw and a drive motor. The bidirectional screw is rotatably connected to the housing and threadedly connected to the two mounting seats, and the bidirectional screw passes through the two mounting seats. The drive motor is connected to the housing, and the output end of the drive motor is connected to the bidirectional screw.

7. The roll welding device for the inner and outer shells of the fuel tank as described in claim 5, characterized in that, The adjusting component includes a telescopic rod, a lifting seat, a fixed rod, and a floating component. The fixed rod is fixedly connected to the frame and located inside the frame. The lifting seat is slidably connected to the fixed rod and is sleeved on the fixed rod. The telescopic rod is connected to the lifting seat and to the outer shell. The floating component is disposed on the fixed rod.

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