A fuel tank seam welding device and welding method

Abstract

This invention relates to the field of welding technology, specifically to a fuel tank seam welding device and method. The fuel tank seam welding device includes a welding assembly, a positioning assembly, a guiding assembly, and a rotating assembly. The welding assembly includes two electrode wheels with a first anti-slip texture on their circumferential surface, the texture forming an acute angle with the axis. The positioning assembly has a contour seat with a contour groove adapted to the shape of the fuel tank. The guiding assembly includes parallel first and second guide rails and multiple guide posts, with a guiding channel between the two guide rails. The guide posts are fixed to the bottom of the contour seat and arranged at intervals along its contour. The two ends of the guiding channel are an inlet end and an outlet end; the guide posts enter from the inlet end and exit from the outlet end. The welding assembly is located above the guiding assembly. The rotating assembly drives the contour seat to rotate, during which some guide posts exit and some enter, with the end of the first anti-slip texture near the outlet end tilting towards the contour seat. This solves the problem of over-welding at weld corners caused by guide post vibration.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically, to a welding device and welding method for seam welding of fuel tanks. Background Technology

[0002] During the welding process of a fuel tank, the friction between two electrode wheels and the surface of the fuel tank is typically used to move the fuel tank forward along a pre-set guide channel. Simultaneously, a rotating component connected to the fuel tank drives it to rotate during this movement. This allows the electrode wheels to form a contour weld along a pre-set trajectory at the edge of the fuel tank, thus achieving the welding process on the fuel tank edge.

[0003] However, the guide post needs to enter the guide channel to accommodate the movement and rotation of the fuel tank. When the profiled seat rotates too much, the rotational inertia generated by the fuel tank will be transmitted to the guide post, causing it to repeatedly impact itself within the guide channel. This will result in decreased positioning accuracy and oscillations when the fuel tank rotates, leading to repeated welding at weld corners, resulting in over-welding and ultimately affecting the weld quality. Summary of the Invention

[0004] To address the problem of over-welding at weld corners caused by vibration of the guide column, this invention provides a fuel tank seam welding device and welding method.

[0005] In a first aspect, the present invention provides a fuel tank seam welding device, the fuel tank seam welding device comprising:

[0006] A welding assembly, comprising two electrode wheels; the circumferential surface of each electrode wheel has a first anti-slip texture; the texture of the first anti-slip texture forms a first angle with the axis of the electrode wheel; the first angle is an acute angle.

[0007] A positioning component, comprising a contouring seat; the contouring seat having a contouring groove; the contouring groove being adapted to the shape of a fuel tank;

[0008] A guiding assembly includes a first guide rail, a second guide rail, and a plurality of guide posts; the first guide rail and the second guide rail are parallel; a guiding channel is formed between the first guide rail and the second guide rail; the plurality of guide posts are fixedly connected to the bottom of the contour base; the plurality of guide posts are arranged at intervals along the contour of the contour base; one end of the guiding channel is an inlet end, and the other end is an outlet end; the guide posts enter the guiding channel from the inlet end and leave the guiding channel from the outlet end; a welding assembly is located above the guiding assembly.

[0009] A rotating assembly drives the contouring seat to rotate; during the rotation of the contouring seat, some of the guide posts leave the guide channel from the outlet end, and another part of the guide posts enter the guide channel from the inlet end; the first anti-slip texture is inclined towards the contouring seat at the end near the outlet end.

[0010] In some embodiments, the first included angle is complementary to the minimum included angle of the annular weld of the fuel tank.

[0011] In some embodiments, the arc length of the electrode wheel occupied by the first anti-slip texture in the circumferential direction is greater than or equal to the arc length at the minimum included angle of the weld of the fuel tank.

[0012] In some embodiments, the height at which the middle portion of the first anti-slip texture protrudes from the electrode wheel is a first height; the height at which both ends of the first anti-slip texture protrude from the electrode wheel is a second height; and the first height is less than the second height.

[0013] In some embodiments, each ridge of the first anti-slip texture forms a compression plane away from the surface of the electrode wheel; the perpendicular line from the middle of each ridge of the first anti-slip texture to the axis of the electrode wheel is perpendicular to the compression plane.

[0014] In some embodiments, the dimension of each tread of the first anti-slip pattern in the axial direction of the electrode wheel is less than 70% of the axial length of the electrode wheel.

[0015] In some embodiments, the circumferential surface of the electrode wheel also has a second anti-slip texture; the texture of the second anti-slip texture is parallel to the axis of the electrode wheel.

[0016] In some embodiments, the circumferential surface of the electrode wheel also has a third anti-slip texture; the texture of the third anti-slip texture has a second included angle with the axis of the electrode wheel; the second included angle is an acute angle;

[0017] In the annular weld of the fuel tank, the included angle of the second position arranged in ascending order is complementary to the second included angle.

[0018] In some embodiments, the distribution density of the first anti-slip pattern along the axis of the electrode wheel is greater than the distribution density of the third anti-slip pattern along the axis of the electrode wheel.

[0019] In a second aspect, the present invention provides a fuel tank welding method, applied to the fuel tank seam welding apparatus described in any one of the first aspects, the fuel tank welding method comprising:

[0020] Obtain the model information of the fuel tank;

[0021] Based on the model information, the fuel tank seam welding device is modified so that the welding components and positioning components are matched with the fuel tank.

[0022] Based on the completion of the fuel tank seam welding device transformation, the two electrode wheels of the welding assembly are controlled to rotate until the first anti-slip pattern is in a preset initial position, so that the first anti-slip pattern can squeeze and weld the arc welding path with the largest corner of the fuel tank during the welding process.

[0023] Position the fuel tank on the positioning assembly;

[0024] Based on the completion of the fuel tank positioning and the first anti-slip texture being in the preset initial position, the two electrode wheels of the welding assembly are controlled to clamp the welding starting point position of the fuel tank;

[0025] Based on the electrode wheel being at the welding starting point position, the electrode wheel is controlled to rotate, thereby moving the fuel tank and welding the fuel tank;

[0026] Since the electrode wheel is rotating, the rotating component is controlled to drive the positioning component to rotate by a preset angle within a preset time period until the welding component welds along the contour of the fuel tank to form a contoured annular weld, and the welding is completed.

[0027] To address the problem of over-welding at weld corners caused by the vibration of the guide column, this invention has the following advantages:

[0028] By setting a first anti-slip texture on the circumferential surface of the electrode wheel in the welding assembly, and the texture of the first anti-slip texture forming an acute angle with the axis of the electrode wheel, and the end of the first anti-slip texture near the outlet inclined towards the contour seat, when the fuel tank enters the welding area at the corner, the linear velocity direction of the fuel tank is perpendicular to the first anti-slip texture, thereby generating a higher damping force, improving the stability of the fuel tank's positioning during rotation, and reducing oscillation; thus avoiding inaccurate welding of the fuel tank caused by repeated impacts of the guide post in the guide channel, reducing the possibility of repeated welding and over-welding at the weld corner, and ultimately improving the welding quality. Attached Figure Description

[0029] Figure 1 A schematic diagram of a fuel tank welding device according to one embodiment is shown;

[0030] Figure 2 It shows Figure 1 A schematic diagram of the welding components and positioning components;

[0031] Figure 3 It shows Figure 2 A top view of the welding and positioning components;

[0032] Figure 4 It shows Figure 2 A schematic diagram of the positioning component;

[0033] Figure 5 It shows Figure 2 Enlarged view of the welding components;

[0034] Figure 6 A schematic flowchart of a fuel tank welding method according to one embodiment is shown.

[0035] Reference numerals: Welding assembly 10; Electrode wheel 11; First anti-slip texture 12; Second anti-slip texture 13; Third anti-slip texture 14; Positioning assembly 20; Contouring seat 21; Contouring groove 22; Guide assembly 30; First guide rail 31; Second guide rail 32; Guide post 33; Rotating assembly 40; Fuel tank 50. Detailed Implementation

[0036] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0037] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0038] During the welding process of the fuel tank 50, the friction between the two electrode wheels 11 and the surface of the fuel tank 50 is typically used to move the fuel tank 50 along a pre-set guide channel. Simultaneously, the rotating component 40 is connected to the fuel tank 50, driving the fuel tank 50 to rotate during this movement. This allows the electrode wheels 11 to form a contour weld at the edge of the fuel tank 50, thus achieving the welding process on the edge of the fuel tank 50. However, the guide post 33 needs to enter the guide channel to cooperate with the movement and rotation of the fuel tank 50. When the rotation angle of the contour seat 21 is too large, the rotational inertia generated by the fuel tank 50 will be transmitted to the guide post 33, causing the guide post 33 to repeatedly impact within the guide channel. This will cause a decrease in the positioning accuracy of the fuel tank 50 during rotation, resulting in oscillations, and consequently, repeated welding at the weld corner, leading to over-welding and affecting the welding quality.

[0039] Example 1:

[0040] In this embodiment, to solve the above problems, this application provides a fuel tank welding device, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the oil tank welding device includes a welding assembly 10, a positioning assembly 20, a guiding assembly 30, and a rotating assembly 40.

[0041] The welding assembly 10 includes two electrode wheels 11. The friction between the two electrode wheels 11 and the surface of the fuel tank 50 drives the fuel tank 50 to move along a preset guide channel, thereby realizing the welding operation of the weld seam of the fuel tank 50. A first anti-slip texture 12 is provided on the circumferential surface of the electrode wheels 11. The first anti-slip texture 12 increases the friction between the electrode wheels 11 and the surface of the fuel tank 50, ensuring a more stable driving effect on the fuel tank 50. Simultaneously, the texture of the first anti-slip texture 12 forms a first included angle with the axis of the electrode wheels 11, and this first included angle is acute.

[0042] The positioning component 20 includes a contour base 21 with a contour groove 22 that is adapted to the shape of the fuel tank 50. The contour base 21 can position and limit the fuel tank 50, ensuring that the fuel tank 50 does not shift during the welding process.

[0043] The guide assembly 30 includes a first guide rail 31, a second guide rail 32, and multiple guide posts 33. The first guide rail 31 and the second guide rail 32 are arranged in parallel, and a guide channel is provided between the first guide rail 31 and the second guide rail 32, thereby providing a path for the movement of the guide posts 33. The multiple guide posts 33 are fixedly connected to the bottom of the contour base 21. The multiple guide posts 33 are arranged at intervals along the contour of the contour base 21. One end of the guide channel is the inlet end, and the other end is the outlet end. The guide posts 33 enter the guide channel from the inlet end and leave the guide channel from the outlet end. The welding assembly 10 is located above the guide assembly 30. In this way, when the contour base 21 moves and rotates, the movement of the guide posts 33 in and out of the guide channel guides and limits the movement of the contour base 21 and the fuel tank 50, ensuring that the fuel tank 50 moves along a preset trajectory and cooperates with the welding assembly 10 to complete the welding.

[0044] The rotating component 40 drives the contour base 21 to rotate, enabling the electrode wheel 11 to weld at the corner of the fuel tank 50, ensuring welding continuity. The rotating component 40 can be a cylinder, motor, hydraulic motor, etc. During the rotation of the contour base 21, some guide posts 33 leave the guide channel from the outlet end, while others enter the guide channel from the inlet end, thus adapting to the rotational movement of the contour base 21 and guiding and limiting the movement trajectory of the contour plate and the fuel tank 50. The first anti-slip tread 12 has its tread pattern inclined towards the contour base 21 at the end closest to the outlet end. When the fuel tank 50 rotates at a large angle, the guide posts 33 entering the guide channel will collide with the first track, and then rebound through the reaction force of the first track to collide with the second guide rail 32. This causes the guide posts 33 to repeatedly oscillate between the first and second tracks, which is transmitted to the welding point between the fuel tank 50 and the electrode wheel 11, thus affecting the welding effect of the fuel tank 50 and the electrode wheel 11. The first anti-slip groove 12 has its end near the outlet inclined towards the contour seat 21, so that it tends to be perpendicular when the two electrode wheels 11 enter the weld corner of the fuel tank 50. This enhances friction and damping effect, reduces the impact of repeated oscillations transmitted to the fuel tank 50, and allows the fuel tank 50 to rotate smoothly. This also reduces the possibility of excessive and uncontrollable oscillations at the weld corner of the fuel tank 50, which could lead to repeated welding at the corner, thus improving welding quality.

[0045] Furthermore, such as Figure 5 As shown, the first included angle is complementary to the minimum included angle of the annular weld of the fuel tank 50. This arrangement allows the first anti-slip pattern 12 to better match the minimum included angle of the annular weld of the fuel tank 50. Through the complementary relationship between the first included angle and the minimum included angle of the annular weld, the first anti-slip pattern 12 is perpendicular to the weld corner of the fuel tank 50, which can enhance the friction and damping force between the electrode wheel 11 and the fuel tank 50 at the corner, thereby more effectively reducing the occurrence of repeated welding at the weld corner.

[0046] Furthermore, such as Figure 5 As shown, the arc length of the first anti-slip pattern 12 on the electrode wheel 11 in the circumferential direction is greater than or equal to the arc length at the minimum included angle of the weld of the fuel tank 50. This ensures that at the minimum included angle of the weld corner of the fuel tank 50, the first anti-slip pattern 12 on the electrode wheel 11 is always in contact with that position, thereby ensuring that the first anti-slip pattern 12 can continuously provide a large damping force during the rotation of the fuel tank 50. This reduces the occurrence of repeated welding at the weld corner of the fuel tank 50 due to insufficient coverage of the anti-slip pattern, ultimately reducing the occurrence of repeated welding and ensuring the reliability of the weld of the fuel tank 50.

[0047] Furthermore, such as Figure 5As shown, the height of the middle part of the first anti-slip groove 12 protruding from the electrode wheel 11 is the first height. The height of the two ends of the first anti-slip groove 12 protruding from the electrode wheel 11 is the second height. The first height is less than the second height. In this way, when the middle part of the first anti-slip groove 12 contacts the fuel tank, a larger contact area can be formed, which in turn can generate greater frictional resistance. By increasing the friction between the first anti-slip groove 12 and the corner of the weld seam of the fuel tank 50, it helps to improve the stability of the fuel tank 50 during rotation and reduce the impact of the oscillation generated by the guide post 33.

[0048] Furthermore, such as Figure 6 As shown, each groove of the first anti-slip texture 12 forms a compression plane away from the surface of the electrode wheel 11. The perpendicular line from the middle of each groove of the first anti-slip texture 12 to the axis of the electrode wheel 11 is perpendicular to the compression plane. This allows the first anti-slip texture 12 to generate a large compression force at the point of contact with the fuel tank 50 when it first contacts the fuel tank 50, thanks to the height of its two ends, thus achieving greater frictional resistance. Simultaneously, the perpendicular line from the middle of the first anti-slip texture 12 to the axis of the electrode wheel 11 being perpendicular to the compression plane allows for a larger contact area when the middle part of the first anti-slip texture 12 contacts the fuel tank 50, generating greater frictional resistance and thus enhancing the overall frictional effect of the first anti-slip texture 12 on the fuel tank 50.

[0049] Furthermore, such as Figure 5 As shown, the dimension of each groove of the first anti-slip groove 12 in the axial direction of the electrode wheel 11 is less than 70% of the axial length of the electrode wheel 11. Since the height at both ends of the first anti-slip groove 12 protruding from the electrode wheel 11 is the second height, if the length of the first anti-slip groove 12 is too long, it will cause a certain amount of bumping when the first anti-slip groove 12 just contacts the fuel tank 50 and transitions to the middle of the first anti-slip groove 12. Therefore, by limiting the length of the first anti-slip groove 12, it is ensured that when the first anti-slip groove 12 contacts the fuel tank 50, the electrode wheel 11 can stably weld the fuel tank 50, thereby ensuring the welding quality of the weld seam of the electrode wheel 11 to the fuel tank 50.

[0050] Furthermore, such as Figure 5 As shown, the circumferential surface of the electrode wheel 11 also has a second anti-slip texture 13; the texture of the second anti-slip texture 13 is parallel to the axis of the electrode wheel 11. When the electrode wheel 11 moves in a straight line along the weld seam of the fuel tank 50, the second anti-slip texture 13 can further increase the friction between the electrode wheel 11 and the surface of the fuel tank 50, providing a stable damping force. Together with the first anti-slip texture 12, it forms a multi-directional anti-slip effect, thereby enhancing the stability of the fuel tank 50 during the welding process, reducing vibration, and thus reducing the possibility of repeated welding of the fuel tank 50.

[0051] Furthermore, such as Figure 5As shown, the circumferential surface of the electrode wheel 11 also has a third anti-slip texture 14. The texture of the third anti-slip texture 14 has a second included angle with the axis of the electrode wheel 11, and the second included angle is an acute angle. The included angles of the second position in the annular weld of the fuel tank 50 are complementary to the second included angle in an increasing order. The setting of the third anti-slip texture 14 can increase the contact friction between the electrode wheel 11 and the weld of the fuel tank 50. The acute angle of the second included angle allows the second anti-slip texture 13 to be arranged at the second included angle in an increasing order in the annular weld of the fuel tank 50, providing a greater damping effect. The complementary arrangement of the second included angles in the annular weld of the fuel tank 50 allows the third anti-slip texture 14 to better fit the weld at that position, thereby further improving the stability of the fuel tank 50 during welding, reducing vibration, and thus reducing the occurrence of repeated welding.

[0052] Furthermore, such as Figure 5 As shown, the distribution density of the first anti-slip pattern 12 along the axis of the electrode wheel 11 is greater than that of the third anti-slip pattern 14 along the axis of the electrode wheel 11. At the largest included angle in the annular weld of the fuel tank 50, by having a higher distribution density of the first anti-slip pattern 12, a denser distribution of the first anti-slip pattern 12 can be provided in the area with the largest corner angle of the fuel tank 50, enhancing frictional resistance and reducing oscillations when the electrode wheel 11 welds the fuel tank 50 weld. The third anti-slip pattern 14, with its lower distribution density, can meet the frictional requirements at the second largest included angle in the annular weld of the fuel tank 50, avoiding excessive setting that would lead to unnecessary energy consumption by the electrode wheel 11. The cooperation of the first anti-slip pattern 12 and the third anti-slip pattern 14 enables more precise stability in the welding of the electrode wheel 11 to the corner of the fuel tank 50.

[0053] Example 2:

[0054] In this embodiment, this application provides a fuel tank welding method, applied to the fuel tank seam welding apparatus of any of the embodiments, such as... Figure 6 As shown, the fuel tank welding method includes steps S10 to S70, which will be described in detail below:

[0055] Step S10: Obtain the model information of fuel tank 50.

[0056] Step S20: Based on the model information, the seam welding device of the fuel tank 50 is changed so that the welding component 10 and the positioning component 20 are matched with the fuel tank 50, laying the foundation for subsequent precise welding.

[0057] In step S30, based on the completion of the changeover of the welding device for the fuel tank 50, the two electrode wheels 11 of the welding assembly 10 are controlled to rotate until the first anti-slip groove 12 is in a preset initial position, ensuring that the first anti-slip groove 12 can compress the arc welding path with the largest corner of the fuel tank 50 during the welding process. The setting of the first anti-slip groove 12 reduces the vibration generated by the guide post 33, thereby reducing the impact on the welding of the fuel tank 50. This makes the minimum included angle between the first anti-slip groove 12 and the annular weld of the fuel tank 50 complementary, thus ensuring the reliability of the weld of the fuel tank 50.

[0058] Step S40: Position the fuel tank 50 on the positioning component 20 to ensure the position of the fuel tank 50 during the welding process and improve the welding quality of the fuel tank 50 weld.

[0059] In step S50, based on the completion of the positioning of the fuel tank 50 and the first anti-slip texture 12 being in the preset initial position, the two electrode wheels 11 of the welding assembly 10 are controlled to clamp the welding starting point position of the fuel tank 50, ensuring that the two electrode wheels 11 can weld the fuel tank 50.

[0060] In step S60, based on the electrode wheel 11 being at the welding starting point position, the electrode wheel 11 is controlled to rotate to move the fuel tank 50 and weld the fuel tank 50.

[0061] In step S70, based on the electrode wheel 11 being in a rotating state, the rotating component 40 is controlled to drive the positioning component 20 to rotate by a preset angle within a preset time period. That is, the welding position of the electrode wheel 11 on the fuel tank 50 is determined in real time by the rotation speed and time of the electrode wheel 11. After the preset time has elapsed, it indicates that the electrode wheel 11 needs to weld the corner of the fuel tank 50. Therefore, the rotating component 40 needs to be controlled to rotate the positioning component 20 and the fuel tank 50 within the positioning component 20, thereby enabling the electrode wheel 11 to better weld the weld of the fuel tank 50. Welding is completed when the welding component 10 welds along the contour of the fuel tank 50 to form a contoured annular weld.

[0062] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A fuel tank seam welding device, characterized in that, The oil tank seam welding device includes: A welding assembly includes two electrode wheels; the circumferential surface of the electrode wheels has a first anti-slip texture; the texture of the first anti-slip texture has a first included angle with the axis of the electrode wheel; the first included angle is an acute angle; the first included angle is complementary to the minimum included angle of the annular weld of the fuel tank. A positioning component, comprising a contouring seat; the contouring seat having a contouring groove; the contouring groove being adapted to the shape of a fuel tank; A guiding assembly includes a first guide rail, a second guide rail, and a plurality of guide posts; the first guide rail and the second guide rail are parallel; a guiding channel is formed between the first guide rail and the second guide rail; the plurality of guide posts are fixedly connected to the bottom of the contour base; the plurality of guide posts are arranged at intervals along the contour of the contour base; one end of the guiding channel is an inlet end, and the other end is an outlet end; the guide posts enter the guiding channel from the inlet end and leave the guiding channel from the outlet end; a welding assembly is located above the guiding assembly. A rotating assembly drives the contouring seat to rotate; during the rotation of the contouring seat, some of the guide posts leave the guide channel from the outlet end, and another part of the guide posts enter the guide channel from the inlet end; the first anti-slip texture is inclined towards the contouring seat at the end near the outlet end.

2. The oil tank seam welding device according to claim 1, characterized in that, The arc length of the first anti-slip texture on the circumference of the electrode wheel is greater than or equal to the arc length at the minimum included angle of the weld of the fuel tank.

3. The oil tank seam welding device according to claim 1, characterized in that, The height of the middle part of the first anti-slip texture protruding from the electrode wheel is the first height; the height of both ends of the first anti-slip texture protruding from the electrode wheel is the second height; the first height is less than the second height.

4. The oil tank seam welding device according to claim 3, characterized in that, Each groove of the first anti-slip texture forms a compression plane away from the surface of the electrode wheel; the perpendicular line from the middle of each groove of the first anti-slip texture to the axis of the electrode wheel is perpendicular to the compression plane.

5. The oil tank seam welding device according to claim 4, characterized in that, Each tread of the first anti-slip pattern has a dimension in the axial direction of the electrode wheel that is less than 70% of the axial length of the electrode wheel.

6. The oil tank seam welding device according to claim 1, characterized in that, The circumferential surface of the electrode wheel also has a second anti-slip texture; the texture of the second anti-slip texture is parallel to the axis of the electrode wheel.

7. The oil tank seam welding device according to claim 6, characterized in that, The circumferential surface of the electrode wheel also has a third anti-slip texture; the texture of the third anti-slip texture has a second included angle with the axis of the electrode wheel; the second included angle is an acute angle; In the annular weld of the fuel tank, the included angle of the second position arranged in ascending order is complementary to the second included angle.

8. The oil tank seam welding device according to claim 7, characterized in that, The distribution density of the first anti-slip pattern along the axis of the electrode wheel is greater than the distribution density of the third anti-slip pattern along the axis of the electrode wheel.

9. A method for welding fuel tanks, applied to the fuel tank seam welding apparatus according to any one of claims 1-8, characterized in that, The fuel tank welding method includes: Obtain the model information of the fuel tank; Based on the model information, the fuel tank seam welding device is modified so that the welding components and positioning components are matched with the fuel tank. Based on the completion of the fuel tank seam welding device transformation, the two electrode wheels of the welding assembly are controlled to rotate until the first anti-slip pattern is in a preset initial position, so that the first anti-slip pattern can squeeze and weld the arc welding path with the largest corner of the fuel tank during the welding process. Position the fuel tank on the positioning assembly; Based on the completion of the fuel tank positioning and the first anti-slip pattern being in the preset initial position, the two electrode wheels of the welding assembly are controlled to clamp the welding starting point position of the fuel tank; Based on the electrode wheel being at the welding starting point position, the electrode wheel is controlled to rotate, thereby moving the fuel tank and welding the fuel tank; Since the electrode wheel is rotating, the rotating component is controlled to drive the positioning component to rotate by a preset angle within a preset time period until the welding component welds along the contour of the fuel tank to form a contoured annular weld, and the welding is completed.

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