Welding equipment for fuel tank

Abstract

The utility model discloses welding equipment for a fuel tank, which comprises an overturning unit and a clamping unit, the clamping unit comprises a base plate which is fixedly arranged on the upper end face of an object placing table of the overturning unit, and the base plate is provided with a gasket plate which is used for positioning a main tank body on the fuel tank. A plurality of cushion blocks used for supporting the bottom of a main tank body on the fuel tank are fixedly arranged on the upper end faces of the front side edge and the rear side edge of the gasket plate at intervals respectively, and four cushion plates used for positioning installation feet on the fuel tank are arranged on the peripheral side of the upper end face of the base plate. The main box body can be quickly positioned, spliced and welded, all parts and the main box body can be quickly and accurately spliced together, then spot welding fixing and dense welding are conducted, the overall welding time is effectively shortened, all the parts are positioned, corrected and supported, contraction and deformation of the fuel tank after welding are effectively controlled, the welding reliability is improved, and the welding efficiency is improved. The problems of wrong welding directions and wrong welding positions of the parts are solved; and the fuel tank can be overturned and adjusted at any angle, so that the welding difficulty is reduced, the labor intensity of workers is reduced, and the overall welding efficiency and the welding quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel tank welding auxiliary equipment, and particularly relates to a welding device for a fuel tank. Background Technique

[0002] A fuel tank, that is, a container device for storing fuel, is generally used on machines driven by gasoline engines or diesel engines. Storing fuel is the most basic function of a fuel tank. In addition, it also plays functions such as heat dissipation, sedimentation of impurities in the fuel, and separation of air bubbles in the oil body. For example Figures 1 to 3As shown in the figure, a fuel tank for a heavy rail vehicle includes a main box body A with an upward opening. At the front and rear ends of the outer side of the left side plate A-3 of the main box body A and the front and rear ends of the outer side of the right side plate A-4, there are respectively welded and fixed with an installation foot B. On the bottom plate of the installation foot B, three first installation holes B-1 are spaced apart from the outer edge away from the main box body A. Inside the cavity of the main box body A, a transverse partition G is welded and fixed on the front side. Both the left and right ends of the transverse partition G extend outside the main box body A, and the right end of the transverse partition G extending outside the right side plate A-4 forms an L-shaped step G-1. On the outer side of the left end of the rear side plate A-2 of the main box body A, an oil pillow C is welded. On the outer side of the rear end of the left side plate A-3 of the main box body A, a secondary oil storage cavity D is also welded and fixed. The installation foot B corresponding to the rear end of the left side plate A-3 is welded and fixed on the left outer wall surface of the secondary oil storage cavity D. Outside the right rear corner position of the main box body A, there is an L-shaped first oil pipeline E, and outside the right front corner position, there is an L-shaped second oil pipeline F. The flange E-1 at the rear end of the L-shaped first oil pipeline E is welded and fixed on the upper side of the right end of the outer side of the rear side plate A-2 through a first support plate K. On the outer side of the rear end of the right side plate A-4, an L-shaped vertical plate A-4a is vertically welded and fixed. In the middle of the outer side of the right side plate A-4, a horizontal support plate H is welded. The flange E-2 at the front end of the L-shaped first oil pipeline E is welded and fixed on the right-angle edge surface of the L-shaped vertical plate A-4a. The front end of the L-shaped second oil pipeline F penetrates and is welded and fixed on the front end of the right side plate A-4. The flange F-1 at the rear end of the L-shaped second oil pipeline F is welded and fixed on the right-angle edge surface of the L-shaped step G-1. On the outer side of the right end of the front side plate A-1, two right-angle plates L are welded and fixed from top to bottom. Between the two mutually perpendicular arm plates of the right-angle plate L, a horizontal rib plate L-1 is welded and fixed. It also includes an L-shaped third oil pipeline M welded and fixed on the lower side of the outer side of the rear side plate A-2. The left end of the L-shaped third oil pipeline M penetrates and is welded and fixed on the lower side of the outer side of the rear side plate A-2. The flange plate M-1 at the right end of the L-shaped third oil pipeline M is vertically welded and fixed on the lower side of the right end of the outer side of the rear side plate A-2. On the lower side of the middle of the outer side of the left side plate A-3, a pair of second support plates J-1 are horizontally and vertically welded and fixed in the front-rear direction. At the ends of the pair of second support plates J-1, a connecting vertical plate J is welded and fixed in the horizontal direction. Along the length direction of the connecting vertical plate J, a number of third installation holes J-2 are spaced apart. A number of second installation holes are opened on the flange E-1, flange E-2, flange F-1, and flange plate M-1. There is a fourth installation hole on the horizontal support plate H. There are fifth installation holes on the arm plate of the right-angle plate L in the front-rear direction.Since the fuel tank has high requirements for the weld sealing performance, and the fuel tank with this structure is large in volume, involves many components, and has complex welding positions, the following problems exist in the traditional manual splicing and welding method: (1) The alignment accuracy of each component is poor, resulting in a large deviation in the overall dimensions of the fuel tank after welding, and in severe cases, it is even difficult to meet the requirements of the drawing dimensions and geometric tolerances; (2) The weld sealing performance requirements are high, and the welding time for each component is relatively long, resulting in a large overall deformation of the fuel tank after welding; (3) There are requirements for the welding direction for the first L-shaped oil pipe, the second L-shaped oil pipe, the third L-shaped oil pipe, and the connecting vertical plate. If the operator is slightly careless, the positions of the first L-shaped oil pipe and the second L-shaped oil pipe will be welded in reverse, and the directions of the third L-shaped oil pipe and the connecting vertical plate will be welded in reverse, resulting in the unqualified finished fuel tank and the need for rework and repair, which easily leads to product rework and scrapping; (4) There are many components involved, and workers need to splice each component in place before welding. The workload is large and the welding efficiency is not high, making it difficult to meet the requirements of large-scale shipments. Therefore, it is necessary to specifically design a welding device for fuel tanks in order to improve the welding efficiency and product quality of fuel tanks. Summary of the Invention

[0003] The purpose of the present utility model is to overcome the defects existing in the prior art and provide a welding device for fuel tanks. First, the side plates can be quickly positioned, spliced, and welded into the main body of the fuel tank. Secondly, the main body of the fuel tank and each component can be quickly and accurately positioned, spliced, and fixed on the clamping unit to achieve the quick and precise auxiliary splicing of each component. Then, spot welding and dense welding are carried out, significantly reducing the difficulty of splicing, spot welding, and dense welding of each component, effectively shortening the overall welding time, and playing a role in positioning, correcting, and supporting each component, thereby effectively controlling the shrinkage and deformation of the fuel tank after welding, improving the welding reliability, eliminating the problems of incorrect welding direction and incorrect welding position of components, enabling the finished fuel tank after welding to meet the requirements of the drawing dimensions and geometric tolerances, and ensuring the product qualification rate; it can also realize the flipping adjustment of the fuel tank at any angle through the flipping unit to reduce the welding difficulty, thereby helping to reduce the manual labor intensity, improve the overall welding efficiency and welding quality, and meet the requirements of large-scale shipments.

[0004] To achieve the above purpose, the technical solution of the present utility model is to design a welding device for fuel tanks, including a flipping unit and a clamping unit. The flipping unit includes symmetrically arranged left support plates, right support plates, and a placement table horizontally arranged between the left support plate and the right support plate. One end of the placement table is fixedly connected to a rotating disk arranged on the left support plate, and the other end is fixedly connected to a rotating disk arranged on the right support plate. The middle part of the placement table has a placement hole;

[0005] The described clamping unit includes a base plate fixedly arranged on the upper end surface of the placement table. The base plate is provided with a gasket plate for positioning the main body of the fuel tank. The gasket plate is fitted and adapted to the upper port of the main body. On the upper end surfaces of the front and rear sides of the gasket plate, a number of pads for supporting the bottom of the main body of the fuel tank are fixedly arranged at intervals along the length direction. On the outer peripheral side of the upper end surface of the base plate, four backing plates are provided, which are arranged around the outer peripheral side of the gasket plate and are used for positioning the mounting feet on the fuel tank. On the right end of the rear side edge of the upper end surface of the base plate, a support seat one for positioning flange one on the fuel tank and a support seat two for positioning the flange plate on the fuel tank are fixedly arranged. On the right end of the front side edge of the upper end surface of the base plate, a support seat three for positioning the right-angle plate body on the fuel tank is fixedly arranged. In the middle of the left side edge of the upper end surface of the base plate, a support seat four for positioning the connecting vertical plate on the fuel tank is fixedly arranged. It also includes a free end positioning component of the oil pipe for positioning flange two and flange three on the fuel tank;

[0006] When the main body of the fuel tank is installed on the base plate, the four mounting feet are fixedly arranged on the four backing plates one by one. The lower end edge of the front side plate of the main body is lapped on the pads on the front side of the gasket plate. The lower end edge of the rear side plate of the main body is lapped on the pads on the rear side of the gasket plate. Flange one is fixed on the support seat one. The flange plate is fixed on the support seat two. The right-angle plate body is fixed on the support seat three. The free end positioning component of the oil pipe is fixed on the upper end surface of the horizontal support plate of the fuel tank. Flange two is fixed on the rear end surface of the free end positioning component of the oil pipe. Flange three is fixed on the front end surface of the free end positioning component of the oil pipe.

[0007] A welding device for a fuel tank according to the present utility model can first quickly position and splice the side plates to form the main body, and then quickly and accurately position and splice and fix the main body and various components on the clamping unit to achieve the quick and precise auxiliary splicing of various components. Then, spot welding and dense welding are carried out, significantly reducing the difficulty of splicing, spot welding and dense welding of various components, effectively shortening the overall welding time, and playing a role in positioning, correcting and supporting each component, thereby effectively controlling the shrinkage and deformation amount of the fuel tank after welding, improving the welding reliability, eliminating the problems of wrong welding direction and wrong welding position of components, making the finished fuel tank after welding meet the requirements of drawing dimensions and geometric tolerances, and ensuring the product qualification rate. It can also realize the flipping adjustment of the fuel tank at any angle through the flipping unit to reduce the welding difficulty, thereby helping to reduce the manual labor intensity, improve the overall welding efficiency and welding quality, and meet the requirements of large-volume delivery.

[0008] The preferred technical solution is that three fixing holes two are provided on the backing plate. The mounting feet are fixedly installed on the backing plate through a plugging and fixing component passing through the mounting hole one at the bottom and the corresponding fixing hole two inside. The fixed installation method of the mounting feet on the backing plate is simple, which is convenient for the quick unloading of the finished fuel tank after welding.

[0009] A further preferably technical solution is that the first support seat, the second support seat, the third support seat and the fourth support seat are all L-shaped plates. The L-shaped plate comprises a horizontal arm plate and a vertical arm plate, and the horizontal arm plate is fixedly installed on the substrate;

[0010] A number of third fixing holes are provided on the vertical arm plate of the first support seat, and the third fixing holes correspond one by one to the second mounting holes on the first flange plate. The first flange plate is fixedly installed on the right side surface of the vertical arm plate of the first support seat through a plug-in fixing component inserted into the second mounting holes and the corresponding third fixing holes;

[0011] A number of fourth fixing holes are provided on the vertical arm plate of the second support seat, and the fourth fixing holes correspond one by one to the second mounting holes on the flange plate. The flange plate is fixedly installed on the left side surface of the vertical arm plate of the second support seat through a plug-in fixing component inserted into the second mounting holes and the corresponding fourth fixing holes;

[0012] A number of fifth fixing holes are provided on the vertical arm plate of the third support seat, and the fifth fixing holes correspond one by one to the fifth mounting holes on the right-angle plate body. The right-angle plate body is fixedly installed on the left side surface of the vertical arm plate of the third support seat through a plug-in fixing component inserted into the fifth mounting holes and the corresponding fifth fixing holes;

[0013] A number of sixth fixing holes are provided on the vertical arm plate of the fourth support seat, and the sixth fixing holes correspond one by one to the third mounting holes on the connecting vertical plate. The connecting vertical plate is fixedly installed on the right side surface of the vertical arm plate of the fourth support seat through a plug-in fixing component inserted into the third mounting holes and the corresponding sixth fixing holes. Each component is positioned and spliced with the main box body through the corresponding support seat, laying a foundation for subsequent welding operations, helping to reduce the overall welding difficulty of the fuel tank and improving the welding efficiency at the same time.

[0014] A further preferably technical solution is that the free end positioning component of the oil pipe includes a horizontal bottom plate. A rear vertical plate extending upward is fixedly arranged at the rear end of the horizontal bottom plate, and a front vertical plate extending upward is fixedly arranged at the front end. A plurality of longitudinal rib plates are fixedly arranged between the rear vertical plate and the front vertical plate. A plurality of fixing holes seven corresponding one-to-one to the mounting holes four on the horizontal support plate are formed in the horizontal bottom plate. A plurality of fixing holes eight corresponding one-to-one to the mounting holes two on the flange two are formed in the rear vertical plate. A plurality of fixing holes nine corresponding one-to-one to the mounting holes two on the flange three are formed in the front vertical plate. The free end positioning component of the oil pipe is fixedly installed on the upper end surface of the horizontal support plate through a plugging and fixing component inserted into the fixing holes seven and the corresponding mounting holes four. The flange two is fixedly installed on the rear side surface of the rear vertical plate of the free end positioning component of the oil pipe through a plugging and fixing component inserted into the mounting holes two and the fixing holes eight. The flange three is fixedly installed on the front side surface of the front vertical plate of the free end positioning component of the oil pipe through a plugging and fixing component inserted into the mounting holes two and the fixing holes nine. The end surfaces of each component to be positioned and the fixing methods on the corresponding support seats are simple, which is convenient for each component to be quickly spliced, positioned and fixedly connected with the main box body on the clamping unit, and helps to further improve the overall welding efficiency.

[0015] A further preferably technical solution is that the plugging and fixing component includes a positioning pin. The positioning pin includes a plugging section. One end of the plugging section is coaxially fixedly provided with a threaded section, and the other end has an end cap. A locking nut is screwed on the threaded section. The positioning pin and the locking nut form a bolt component, and the installation or disassembly methods of the two are simple, ensuring the convenience when each component is fixedly installed or disassembled on the support seat.

[0016] A further preferably technical solution is that the plugging and fixing component includes a positioning pin. The positioning pin includes a plugging section. One end of the plugging section is coaxially fixedly provided with a threaded section, and the other end has an end cap. The fixing holes two, fixing holes three, fixing holes four, fixing holes five, fixing holes six, fixing holes seven, fixing holes eight, and fixing holes nine are all set as threaded holes adapted to the threaded sections on the corresponding positioning pins. The structure design of the positioning pin component is simple. Its threaded section can be fixedly connected with the fixing holes by threads. Its plugging section and end cap play a role in positioning the components, thus ensuring the convenience and high efficiency when each component is fixedly installed or disassembled on the support seat.

[0017] A further preferably technical solution further includes a frame structure, the substrate is fixedly arranged on the upper end surface of the frame structure, the frame structure includes two cross beams arranged at intervals and several longitudinal beams, several of the longitudinal beams are horizontally and fixedly arranged between the two cross beams, mounting holes four are arranged at both ends of the cross beams, fixing holes one located on the outer peripheral side of the placement hole are arranged on the substrate, and the frame structure of the clamping unit is fixedly installed above the placement hole of the placement table through bolt assemblies penetrating into the mounting holes four and the corresponding fixing holes one. The frame structure of the clamping unit is fixedly installed on the placement table of the flipping unit through bolt assemblies, and the disassembly and installation operations are simple and convenient, facilitating the selection and replacement of different clamping units according to different models of fuel tanks.

[0018] A further preferably technical solution further includes that weight reduction holes one are arranged at the left and right ends of the placement table, four welding holes corresponding to the backing plates are arranged on the substrate, and several weight reduction holes two are arranged in the middle of the substrate. The weight reduction holes one help to reduce the weight of the placement table, and the welding holes and weight reduction holes two help to reduce the overall weight of the clamping unit, and the welding holes help to reduce the welding difficulty of the mounting feet, enabling the mounting feet and the main box body to be quickly spliced and welded together, so as to carry out the splicing positioning and welding fixation of subsequent components, which helps to improve the welding efficiency of the entire fuel tank.

[0019] A further preferably technical solution further includes that the substrate, washer plate, cushion block, backing plate, support seat one, support seat two, support seat three, support seat four, cross beam, longitudinal beam and the free end positioning assembly of the oil pipe are all made of aluminum. Aluminum has good heat absorption and heat conduction performance, so that the heat generated during the welding process can be absorbed and conducted in time, which helps to reduce the overall welding deformation of the fuel tank.

[0020] The advantages and beneficial effects of the present utility model are as follows:

[0021] 1. For a welding device for a fuel tank of the present utility model, firstly, the side plates can be quickly positioned, spliced and welded into a main box body. Secondly, the main box body and each component can be quickly and accurately positioned, spliced and fixed on the clamping unit to achieve the quick and accurate auxiliary splicing of each component. Then, spot welding fixation and dense welding are carried out, significantly reducing the splicing, spot welding and dense welding difficulties of each component, effectively shortening the overall welding time, and playing a role in positioning, correcting and supporting each component, thereby effectively controlling the shrinkage and deformation amount of the fuel tank after welding, improving the welding reliability, eliminating the problems of incorrect welding direction and incorrect welding position of components, enabling the finished product of the welded fuel tank to meet the requirements of drawing dimensions and geometric tolerances, and ensuring the product qualification rate; it can also realize the flipping adjustment of the fuel tank at any angle through the flipping unit to reduce the welding difficulty, thereby helping to reduce the manual labor intensity, improving the overall welding efficiency and welding quality, and meeting the requirements of large-scale delivery.

[0022] 2. Each component is positioned and spliced together with the main box body through the corresponding support seat, laying a foundation for subsequent welding operations, helping to reduce the overall welding difficulty of the fuel tank, and improving the welding efficiency at the same time.

[0023] 3. The end faces of the components that need to be positioned have a simple fixing method on the corresponding support seats, facilitating the quick splicing, positioning, and fixed connection of the components with the main box body on the clamping unit, which helps to further improve the overall welding efficiency.

[0024] 4. The positioning pin assembly has a simple structure design. Its threaded section can be fixedly connected with the fixing hole by threading, or fixedly locked with the threaded section through a locking nut. Its insertion section and end cap play a role in positioning the components, thus ensuring the convenience and high efficiency of fixing, installing, or disassembling the components on the support seat.

[0025] 5. The frame structure of the clamping unit is fixedly installed on the placement table of the flipping unit through bolt assemblies, and the disassembly and installation operations are simple, facilitating the selection and replacement of different clamping units according to different models of fuel tanks.

[0026] 6. The first weight-reducing hole helps to reduce the weight of the placement table. The welding hole and the second weight-reducing hole help to reduce the overall weight of the clamping unit, and the welding hole helps to reduce the welding difficulty of the mounting feet, enabling the mounting feet and the main box body to be quickly spliced and welded together, so as to carry out the splicing, positioning, and welding and fixing of subsequent components, which helps to improve the welding efficiency of the entire fuel tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a perspective view of the right front side of a fuel tank for a heavy rail vehicle in the background art;

[0028] Figure 2 is a perspective view of the left rear side of a fuel tank for a heavy rail vehicle in the background art;

[0029] Figure 3 is a bottom perspective view of a fuel tank for a heavy rail vehicle in the background art;

[0030] Figure 4 is a perspective view of the right front side of a welding device for a fuel tank according to the present utility model;

[0031] Figure 5 is a perspective view of the main view of the flipping unit;

[0032] Figure 6 is a perspective view of the right front side of the clamping unit;

[0033] Figure 7 is Figure 6Partial enlarged view at W in the middle;

[0034] Figure 8 Is the perspective view of the clamping unit from the bottom-up view;

[0035] Figure 9 Is the perspective view of the positioning assembly at the free end of the oil pipe from the right front side;

[0036] Figure 10 Is the perspective view of the positioning pin;

[0037] Figure 11 Is the perspective view of the assembly relationship of the fuel tank body on the clamping unit from the right front side;

[0038] Figure 12 Is the perspective view of the assembly relationship of the fuel tank body on the clamping unit from the left rear side;

[0039] Figure 13 Is the perspective view of the operating state of a welding device for a fuel tank according to the present utility model from the right front side.

[0040] In the figure: A, main box body; B, mounting feet; C, oil pillow; D, auxiliary oil storage cavity; E, first L-shaped oil pipe; F, second L-shaped oil pipe; G, transverse partition; H, horizontal support plate; J, connecting vertical plate; K, first support plate; L, right-angled plate body; M, third L-shaped oil pipe; A-1, front side plate; A-2, rear side plate; A-3, left side plate; A-4, right side plate; A-4a, L-shaped vertical plate; B-1, first mounting hole; E-1, first flange; E-2, second flange; F-1, third flange; G-1, L-shaped step; J-1, second support plate; J-2, third mounting hole; L-1, horizontal rib plate; M-1, flange plate; Ⅰ, flipping unit; Ⅱ, clamping unit; 1, left support plate; 2, right support plate; 3, placement table; 4, rotating disk; 5, base plate; 6, washer plate; 7, spacer block; 8, backing plate; 9, first support seat; 10, second support seat; 11, third support seat; 12, fourth support seat; 13, cross beam; 14, longitudinal beam; 15, positioning assembly at the free end of the oil pipe; 16, positioning pin; 3-1, placement hole; 3-2, first fixing hole; 3-3, first weight-reducing hole; 5-1, welding hole; 5-2, second weight-reducing hole; 8-1, second fixing hole; 9-1, third fixing hole; 10-1, fourth fixing hole; 11-1, fifth fixing hole; 12-1, sixth fixing hole; 13-1, fourth mounting hole; 15-1, horizontal bottom plate; 15-1a, seventh fixing hole; 15-2, rear vertical plate; 15-2a, eighth fixing hole; 15-3, front vertical plate; 15-3a, ninth fixing hole; 15-4, longitudinal rib plate; 16-1, insertion section; 16-2, threaded section; 16-3, end cap. Detailed implementation mode

[0041] The following will further describe the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, and cannot be used to limit the protection scope of the present utility model.

[0042] Embodiment

[0043] As Figures 4 to 10 shown, the present utility model is a welding device for a fuel tank, including a flipping unit I and a clamping unit II. The flipping unit I includes symmetrically arranged left support plates 1, right support plates 2, and a placement table 3 horizontally arranged between the left support plate 1 and the right support plate 2. One end of the placement table 3 is fixedly connected to a rotating disk 4 provided on the left support plate 1, and the other end is fixedly connected to a rotating disk 4 provided on the right support plate 2. The middle of the placement table 3 has a placement hole 3-1.

[0044] The clamping unit II includes a substrate 5 fixedly provided on the upper end surface of the placement table 3. The substrate 5 has a washer plate 6 for positioning the main body A of the fuel tank on the fuel tank. The washer plate 6 is fitted and adapted to the upper port of the main body A. On the upper end surfaces of the front and rear sides of the washer plate 6, a plurality of pads 7 for supporting the bottom of the main body A of the fuel tank are fixedly provided at intervals along the length direction. On the outer peripheral side of the upper end surface of the substrate 5, four backing plates 8 are provided around the outer peripheral side of the washer plate 6 for positioning the mounting feet B on the fuel tank. On the right end of the rear side edge of the upper end surface of the substrate 5, a support seat 9 for positioning the first flange E-1 on the fuel tank and a support seat 10 for positioning the flange plate M-1 on the fuel tank are fixedly provided. On the right end of the front side edge of the upper end surface of the substrate 5, a support seat 11 for positioning the right-angle plate body L on the fuel tank is fixedly provided. In the middle of the left side edge of the upper end surface of the substrate 5, a support seat 12 for positioning the connecting vertical plate J on the fuel tank is fixedly provided. It also includes a free end positioning assembly 15 of the fuel pipe for positioning the second flange E-2 and the third flange F-1 on the fuel tank.

[0045] When the main body A of the fuel tank is installed on the substrate 5, the four mounting feet B are fixedly provided on the four backing plates 8 one by one. The lower end edge of the front side plate A-1 of the main body A is lapped on the pad 7 on the front side of the washer plate 6. The lower end edge of the rear side plate A-2 of the main body A is lapped on the pad 7 on the rear side of the washer plate 6. The first flange E-1 is fixed on the support seat 9. The flange plate M-1 is fixed on the support seat 10. The right-angle plate body L is fixed on the support seat 11. The free end positioning assembly 15 of the fuel pipe is fixed on the upper end surface of the horizontal support plate H of the fuel tank. The second flange E-2 is fixed on the rear end surface of the free end positioning assembly 15. The third flange F-1 is fixed on the front end surface of the free end positioning assembly 15.

[0046] Preferably, three second fixing holes 8-1 are provided on the backing plate 8, and the mounting foot B is fixedly mounted on the backing plate 8 through a plugging and fixing component inserted into the first mounting hole B-1 at its bottom and the corresponding second fixing hole 8-1.

[0047] Further preferably, the first support seat 9, the second support seat 10, the third support seat 11 and the fourth support seat 12 are all L-shaped plate bodies. The L-shaped plate body includes a horizontal arm plate and a vertical arm plate, and the horizontal arm plate is fixedly mounted on the substrate 5;

[0048] A number of third fixing holes 9-1 are provided on the vertical arm plate of the first support seat 9, and the third fixing holes 9-1 correspond one-to-one with the second mounting holes on the first flange E-1. The first flange E-1 is fixedly mounted on the right side surface of the vertical arm plate of the first support seat 9 through a plugging and fixing component inserted into the second mounting hole and the corresponding third fixing hole 9-1;

[0049] A number of fourth fixing holes 10-1 are provided on the vertical arm plate of the second support seat 10, and the fourth fixing holes 10-1 correspond one-to-one with the second mounting holes on the flange plate M-1. The flange plate M-1 is fixedly mounted on the left side surface of the vertical arm plate of the second support seat 10 through a plugging and fixing component inserted into the second mounting hole and the corresponding fourth fixing hole 10-1;

[0050] A number of fifth fixing holes 11-1 are provided on the vertical arm plate of the third support seat 11, and the fifth fixing holes 11-1 correspond one-to-one with the fifth mounting holes on the right-angled plate body L. The right-angled plate body L is fixedly mounted on the left side surface of the vertical arm plate of the third support seat 11 through a plugging and fixing component inserted into the fifth mounting hole and the corresponding fifth fixing hole 11-1;

[0051] A number of sixth fixing holes 12-1 are provided on the vertical arm plate of the fourth support seat 12, and the sixth fixing holes 12-1 correspond one-to-one with the third mounting hole J-2 on the connecting vertical plate J. The connecting vertical plate J is fixedly mounted on the right side surface of the vertical arm plate of the fourth support seat 12 through a plugging and fixing component inserted into the third mounting hole J-2 and the corresponding sixth fixing hole 12-1.

[0052] Further preferably, the free end positioning assembly 15 of the oil pipe includes a horizontal bottom plate 15-1. A rear vertical plate 15-2 extending upward is fixedly provided at the rear end of the horizontal bottom plate 15-1, and a front vertical plate 15-3 extending upward is fixedly provided at the front end. A plurality of longitudinal rib plates 15-4 are fixedly provided between the rear vertical plate 15-2 and the front vertical plate 15-3. The horizontal bottom plate 15-1 is provided with a plurality of fixing holes seven 15-1a corresponding one by one to the mounting holes four on the horizontal support plate H. A plurality of fixing holes eight 15-2a corresponding one by one to the mounting holes two on the flange two E-2 are provided on the rear vertical plate 15-2. A plurality of fixing holes nine 15-3a corresponding one by one to the mounting holes two on the flange three F-1 are provided on the front vertical plate 15-3. The free end positioning assembly 15 of the oil pipe is fixedly installed on the upper end surface of the horizontal support plate H through a plugging and fixing assembly inserted through the fixing holes seven 15-1a and the corresponding mounting holes four. The flange two E-2 is fixedly installed on the rear side surface of the rear vertical plate 15-2 of the free end positioning assembly 15 of the oil pipe through a plugging and fixing assembly inserted through the mounting holes two and the fixing holes eight 15-2a. The flange three F-1 is fixedly installed on the front side surface of the front vertical plate 15-3 of the free end positioning assembly 15 of the oil pipe through a plugging and fixing assembly inserted through the mounting holes two and the fixing holes nine 15-3a.

[0053] Further preferably, the plugging and fixing assembly includes a positioning pin 16. The positioning pin 16 includes a plugging section 16-1. One end of the plugging section 16-1 is coaxially fixedly provided with a threaded section 16-2, and the other end has an end cap 16-3. A locking nut is screwed on the threaded section 16-2.

[0054] Further preferably, the plugging and fixing assembly includes a positioning pin 16. The positioning pin 16 includes a plugging section 16-1. One end of the plugging section 16-1 is coaxially fixedly provided with a threaded section 16-2, and the other end has an end cap 16-3. The fixing holes two 8-1, fixing holes three 9-1, fixing holes four 10-1, fixing holes five 11-1, fixing holes six 12-2, fixing holes seven 15-1a, fixing holes eight 15-2a, and fixing holes nine 15-3a are all set as threaded holes adapted to the threaded section 16-2 on the corresponding positioning pin 16.

[0055] Further preferably, it further includes a frame structure. The substrate 5 is fixedly provided on the upper end surface of the frame structure. The frame structure includes two horizontally arranged cross beams 13 and a plurality of longitudinal beams 14. A plurality of the longitudinal beams 14 are horizontally and spacedly fixedly provided between the two cross beams 13. Mounting holes four 13-1 are provided at both ends of the cross beam 13. Fixing holes one 3-2 located on the outer peripheral side of the placing hole 3-1 are provided on the substrate 5. The frame structure is fixedly installed above the placing hole 3-1 of the placing table 3 through a bolt assembly inserted through the mounting holes four 13-1 and the corresponding fixing holes one 3-2.

[0056] Further preferably, the storage table 3 is provided with a first weight-reducing hole 3-3 at both left and right ends, the substrate 5 is provided with four welding holes 5-1 corresponding to the backing plates 8, and the substrate 5 is further provided with a plurality of second weight-reducing holes 5-2 in the middle.

[0057] Further preferably, the substrate 5, the washer plate 6, the spacer block 7, the backing plate 8, the first support seat 9, the second support seat 10, the third support seat 11, the fourth support seat 12, the cross beam 13, the longitudinal beam 14 and the oil pipe free end positioning assembly 15 are all made of aluminum.

[0058] The working principle of a welding device for a fuel tank according to the present utility model:

[0059] Step 1: The front side plate A-1, the rear side plate A-2, the left side plate A-3, the right side plate A-4 and the transverse partition G are spliced and welded on the clamping unit II to form a main box body A with an opening downward, wherein the washer plate 6 is embedded in the opening of the main box body A, that is, the washer plate 6 plays a positioning role in the splicing and welding of the main box body A.

[0060] Step 2: As Figures 11 to 13 shown, the main box body A is turned over 180° to a state with an opening upward, and then the four mounting feet B are respectively placed on the corresponding backing plates 8 by using the plug-in fixing component. The plug-in section 16-1 of the positioning pin 16 on the plug-in fixing component passes through the first mounting hole B-1 of the mounting foot B, and a locking nut is screwed on the threaded section 16-2 or directly screwed and fixed in the corresponding second fixing hole 8-1. The three mounting feet B located on the left front side, the right front side and the right rear side of the main box body A are welded and fixedly connected to the corresponding side plates. The oil pillow C is welded and fixed at a specified position on the left end of the outer side surface of the rear side plate A-2. The auxiliary oil storage cavity D is welded and fixed at a specified position on the rear end of the outer side surface of the left side plate A-3. The mounting foot B located on the left rear side of the main box body A is welded and fixed on the left outer wall surface of the auxiliary oil storage cavity D.

[0061] Step 3: Weld the horizontal support plate H and the L-shaped vertical plate A-4a at the specified positions on the outer side of the right side plate A-4. Fix the L-shaped oil pipe one E, the L-shaped oil pipe two F, the L-shaped oil pipe three M, the connecting vertical plate J, and the right-angled plate body L to the corresponding support seats by using the plug-in fixing components. Among them, the flange one E-1 is fixed on the support seat one 9, the flange plate M-1 is fixed on the support seat two 10, the right-angled plate body L is fixed on the support seat three 11, the oil pipe free end positioning component 15 is fixed on the upper end face of the horizontal support plate H of the fuel tank, the flange two E-2 is fixed on the rear side face of the rear vertical plate 15-2 of the oil pipe free end positioning component 15, and the flange three F-1 is fixed on the front side face of the front vertical plate 15-3 of the oil pipe free end positioning component 15. Fix the flange one E-1 on the upper right side of the outer side face of the rear side plate A-2 by welding through the support plate one K, and weld and fix the flange two E-2 on the right-angled edge face of the L-shaped vertical plate A-4a. The front end of the L-shaped oil pipe two F penetrates and is welded and fixed at the front end of the right side plate A-4. The flange three F-1 located at the rear end of the L-shaped oil pipe two F is welded and fixed on the right-angled edge face of the L-shaped step G-1. Weld the arm plate of the right-angled plate body L in the horizontal transverse direction on the front side right end of the front side plate A-1. Fix the connecting vertical plate J on the specified position at the lower middle part of the outer side face of the left side plate A-3 by welding through a pair of support plates two J-1. The left end of the L-shaped oil pipe three M penetrates and is welded and fixed on the lower side of the outer side face of the rear side plate A-2. The flange plate M-1 located at the right end of the L-shaped oil pipe three M is vertically welded and fixed on the specified position at the lower right end of the outer side face of the rear side plate A-2. During the welding process, the opening of the main box body A can be oriented in any direction suitable for welding by flipping the placement table 3 to reduce the welding difficulty. After welding, remove each plug-in fixing component, and then lift and unload the welded fuel tank finished product.

[0062] A welding device for a fuel tank of the present utility model can first quickly position, splice, and weld the side plates into a main box body. Secondly, quickly and accurately position and splice the main box body and each component on the clamping unit to achieve the quick and accurate auxiliary splicing of each component. Then, perform spot welding fixation and dense welding, significantly reducing the splicing, spot welding, and dense welding difficulties of each component, effectively shortening the overall welding time, and playing a role in positioning, correcting, and supporting each component, thereby effectively controlling the shrinkage and deformation amount of the fuel tank after welding, improving the welding reliability, eliminating the problems of wrong welding directions and wrong welding positions of components, enabling the welded fuel tank finished product to meet the requirements of drawing dimensions and geometric tolerances, and ensuring the product qualification rate. It can also achieve the flipping adjustment of the fuel tank at any angle through the flipping unit to reduce the welding difficulty, thereby helping to reduce the manual labor intensity, improve the overall welding efficiency and welding quality, and meet the requirements of large-scale shipments.

[0063] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A welding device for a fuel tank, characterized in that: It comprises a flip unit (I) and a clamping unit (II), wherein the flip unit (I) comprises a symmetrically arranged left support plate (1), a right support plate (2), and a storage platform (3) horizontally arranged between the left support plate (1) and the right support plate (2), wherein one end of the storage platform (3) is fixedly connected to a rotating disk (4) arranged on the left support plate (1), and the other end is fixedly connected to a rotating disk (4) arranged on the right support plate (2), and a storage hole (3-1) is provided in the middle of the storage platform (3); The clamping unit (II) comprises a base plate (5) fixedly mounted on the upper end surface of the storage platform (3), the base plate (5) having a gasket plate (6) for positioning the main tank body (A) on the fuel tank, the gasket plate (6) being embedded and adapted with the upper end of the main tank body (A), the upper end surfaces of the front and rear sides of the gasket plate (6) being respectively fixedly mounted with a plurality of pads (7) for supporting the bottom of the main tank body (A) on the fuel tank at intervals along the length direction, the outer peripheral side of the upper end surface of the base plate (5) being provided with four pads (8) surrounding the outer peripheral side of the gasket plate (6) and used for positioning the mounting foot (B) on the fuel tank ), a support seat 1 (9) for positioning a flange plate 1 (E-1) on a fuel tank and a support seat 2 (10) for positioning a flange plate (M-1) on a fuel tank are fixedly provided at the right end of the rear side edge of the upper end surface of the base plate (5), a support seat 3 (11) for positioning a right-angle plate body (L) on a fuel tank is fixedly provided at the right end of the front side edge of the upper end surface of the base plate (5), a support seat 4 (12) for positioning a connecting vertical plate (J) on a fuel tank is fixedly provided at the middle of the left side edge of the upper end surface of the base plate (5), and also includes a fuel pipe free end positioning assembly (15) for positioning flange plate 2 (E-2) and flange plate 3 (F-1) on a fuel tank; When the main body (A) of the fuel tank is installed on the base plate (5), the four mounting feet (B) are fixedly arranged on the four pads (8) in a one-to-one correspondence, the lower edge of the front side plate (A-1) of the main body (A) overlaps the pad (7) located on the front side of the gasket plate (6), the lower edge of the rear side plate (A-2) of the main body (A) overlaps the pad (7) located on the rear side of the gasket plate (6), the flange plate 1 (E-1) is fixed on the support seat 1 (9), the flange plate (M-1) is fixed on the support seat 2 (10), the right-angle plate body (L) is fixed on the support seat 3 (11), the oil pipe free end positioning assembly (15) is fixed on the upper end surface of the horizontal support plate (H) of the fuel tank, the flange plate 2 (E-2) is fixed on the rear end surface of the oil pipe free end positioning assembly (15), and the flange plate 3 (F-1) is fixed on the front end surface of the oil pipe free end positioning assembly (15).

2. The welding device for a fuel tank according to claim 1, characterized in that: The base plate (8) is provided with three fixing holes (8-1), and the mounting foot (B) is fixedly mounted on the base plate (8) by means of a plug-in fixing assembly which is connected to the mounting hole (B-1) at the bottom thereof and the corresponding fixing hole (8-1).

3. The welding device for a fuel tank according to claim 2, characterized in that: The support seat 1 (9), the support seat 2 (10), the support seat 3 (11) and the support seat 4 (12) are all L-shaped plates, the L-shaped plates include horizontal arm plates and vertical arm plates, and the horizontal arm plates are fixedly mounted on the base plate (5); A plurality of fixing holes 3 (9-1) are provided on the vertical arm plate on the support seat 1 (9), and the fixing holes 3 (9-1) correspond one-to-one with the mounting holes 2 on the flange plate 1 (E-1), and the flange plate 1 (E-1) is fixedly mounted on the right side surface of the vertical arm plate of the support seat 1 (9) by means of a plug-in fixing assembly that penetrates the mounting holes 2 and the corresponding fixing holes 3 (9-1); A plurality of fixing holes four (10-1) are provided on the vertical arm plate on the second support seat (10), and the fixing holes four (10-1) correspond one-to-one to the mounting holes two on the flange plate (M-1), and the flange plate (M-1) is fixedly mounted on the left side surface of the vertical arm plate of the second support seat (10) by means of a plug-in fixing assembly that penetrates through the mounting holes two and the corresponding fixing holes four (10-1); A plurality of fixing holes five (11-1) are provided on the vertical arm plate on the support seat three (11), and the fixing holes five (11-1) correspond one-to-one with the mounting holes five on the right-angle plate body (L), and the right-angle plate body (L) is fixedly mounted on the left side surface of the vertical arm plate of the support seat three (11) by means of a plug-in fixing assembly that penetrates through the mounting holes five and the corresponding fixing holes five (11-1); A plurality of fixing holes six (12-1) are provided on the vertical arm plate on the support seat four (12), and the fixing holes six (12-1) correspond one-to-one to the mounting holes three (J-2) on the connecting vertical plate (J). The connecting vertical plate (J) is fixedly mounted on the right side surface of the vertical arm plate of the support seat four (12) by means of a plug-in fixing assembly which is connected to the mounting holes three (J-2) and the corresponding fixing holes six (12-1).

4. The welding device for a fuel tank according to claim 3, characterized in that: The oil pipe free end positioning assembly (15) comprises a horizontal bottom plate (15-1), a rear vertical plate (15-2) extending upward is fixedly provided at the rear end of the horizontal bottom plate (15-1), a front vertical plate (15-3) extending upward is fixedly provided at the front end, and a plurality of longitudinal ribs (15-4) are fixedly provided between the rear vertical plate (15-2) and the front vertical plate (15-3), the horizontal bottom plate (15-1) is provided with a plurality of fixing holes (15-1a) corresponding one-to-one to the mounting holes (15-4) on the horizontal support plate (H), the rear vertical plate (15-2) is provided with a plurality of fixing holes (15-2a) corresponding one-to-one to the mounting holes (15-2) on the flange plate (E-2), and the front vertical plate (15-3) is provided with a plurality of fixing holes (15-2b) corresponding one-to-one to the mounting holes (15-2) on the flange plate (E-2). A plurality of fixing holes nine (15-3a) corresponding one to one with the mounting holes two on the flange three (F-1); the oil pipe free end positioning assembly (15) is fixedly mounted on the upper end surface of the horizontal support plate (H) by means of a plug-in fixing assembly penetrating through the fixing holes seven (15-1a) and the corresponding mounting holes four; the flange two (E-2) is fixedly mounted on the rear side surface of the rear vertical plate (15-2) of the oil pipe free end positioning assembly (15) by means of a plug-in fixing assembly penetrating through the mounting holes two and the fixing holes eight (15-2a); the flange three (F-1) is fixedly mounted on the front side surface of the front vertical plate (15-3) of the oil pipe free end positioning assembly (15) by means of a plug-in fixing assembly penetrating through the mounting holes two and the fixing holes nine (15-3a).

5. The welding device for a fuel tank according to claim 4, characterized in that: The plug-in fixing assembly comprises a positioning pin (16), the positioning pin (16) comprises a plug-in section (16-1), one end of the plug-in section (16-1) is coaxially fixed with a threaded section (16-2), and the other end has an end cap (16-3), and a locking nut is screwed onto the threaded section (16-2).

6. The welding device for a fuel tank according to claim 4, characterized in that: The plug-in fixing assembly comprises a positioning pin (16), the positioning pin (16) comprises a plug-in section (16-1), one end of the plug-in section (16-1) is coaxially fixed with a threaded section (16-2), and the other end has an end cap (16-3), and the fixing hole two (8-1), fixing hole three (9-1), fixing hole four (10-1), fixing hole five (11-1), fixing hole six (12-1), fixing hole seven (15-1a), fixing hole eight (15-2a), and fixing hole nine (15-3a) are all set as threaded holes adapted to the threaded sections (16-2) on the corresponding positioning pin (16).

7. The welding device for a fuel tank according to claim 5 or 6, characterized in that: It also includes a frame structure, wherein the base plate (5) is fixedly mounted on the upper end surface of the frame structure, and the frame structure includes two spaced-apart cross beams (13) and a plurality of longitudinal beams (14), wherein the plurality of longitudinal beams (14) are fixedly mounted horizontally and spaced-apart between the two cross beams (13), and both ends of the cross beam (13) are provided with four mounting holes (13-1), and the base plate (5) is provided with a fixing hole (3-2) located on the outer peripheral side of the storage hole (3-1), and the frame structure is fixedly mounted above the storage hole (3-1) of the storage table (3) by means of a bolt assembly penetrating the inside of the four mounting holes (13-1) and the corresponding fixing hole (3-2).

8. The welding device for a fuel tank according to claim 7, characterized in that: The storage platform (3) is provided with weight-reducing holes (3-3) located at the left and right ends, the base plate (5) is provided with four welding holes (5-1) corresponding to the pad (8), and the base plate (5) is also provided with a plurality of weight-reducing holes (5-2) located in the middle.

9. The welding device for a fuel tank according to claim 8, characterized in that: The base plate (5), washer plate (6), cushion block (7), pad plate (8), support seat 1 (9), support seat 2 (10), support seat 3 (11), support seat 4 (12), cross beam (13), longitudinal beam (14) and oil pipe free end positioning assembly (15) are all made of aluminum.

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