Welding tool for oil inlet pipe of metal fuel tank

Abstract

The utility model discloses an assembling and welding tool for an oil inlet pipe of a metal fuel tank, and belongs to the technical field of design and manufacturing of automobile part production process equipment. The assembling and welding tool for the oil inlet pipe of the metal fuel tank is relatively high in automation degree and relatively good in assembling and welding quality of the oil inlet pipe of the metal fuel tank. The assembling and welding tool comprises a supporting bottom frame structure, an oil tank fixing device, an oil inlet pipe assembling and maintaining assembly and an intelligent welding system, and at least one assembling station and at least one welding station are arranged on the supporting bottom frame structure. At least one set of fixing device and at least one set of oil inlet pipe assembling and maintaining assembly are movably arranged on the assembling station and the welding station of the supporting bottom frame structure respectively. The metal fuel tank is arranged on the supporting bottom frame structure through the fuel tank fixing device, and the oil inlet pipe is pressed in an oil inlet pipe assembling hole of the metal fuel tank through the oil inlet pipe assembling and maintaining assembly at the assembling station, rotates to the welding station and is welded into the finished metal fuel tank through the intelligent welding system.

Description

Technical Field

[0001] The utility model relates to a welding and assembling tooling, in particular to a welding and assembling tooling for the fuel inlet pipe of a metal fuel tank, belonging to the technical field of design and manufacture of production process equipment for automotive parts. Background Art

[0002] During the production process of an automotive metal fuel tank, the fuel inlet pipe needs to be welded. When welding the fuel inlet pipe, a tooling is required to position the fuel tank and the fuel inlet pipe respectively, and then welding operation is carried out on the fuel inlet pipe to ensure the consistency and qualification rate of the fuel inlet pipe welding. The welding quality stability of the fuel inlet pipe is related to the sealing, pressure resistance and durability of the fuel tank assembly.

[0003] The existing manual welding positioning workbench for metal fuel tanks has the following deficiencies:

[0004] 1. The consistency of manual assembly is poor, the positioning is not firm, and the shaking gap is large;

[0005] 2. The existing tooling requires manual handling and flipping of workpieces by workers, with high labor intensity and low efficiency;

[0006] 3. The tooling is made of angle steel of No. 45 steel, and a single tooling weighs 30 Kg, with high labor intensity during handling and tooling change. Summary of the Utility Model

[0007] The technical problem to be solved by the utility model is to provide a welding and assembling tooling for the fuel inlet pipe of a metal fuel tank with relatively high automation degree and relatively good welding and assembling quality of the metal fuel tank inlet pipe.

[0008] The technical solution adopted to solve the above technical problem is: a welding and assembling tooling for the fuel inlet pipe of a metal fuel tank, the welding and assembling tooling includes a support chassis structure, a fuel tank fixing device, an inlet pipe assembly holding component and an intelligent welding system. At least one assembly station and at least one welding station are arranged on the support chassis structure, and at least one set of fixing device and at least one set of inlet pipe assembly holding component are respectively and movably arranged on the assembly station and the welding station of the support chassis structure; the metal fuel tank is detachably arranged on the support chassis structure through the fuel tank fixing device, the inlet pipe to be assembled is press-fitted into the fuel inlet pipe assembly hole of the metal fuel tank through the inlet pipe assembly holding component at the assembly station, and the semi-finished metal fuel tank after assembly is transferred to the welding station under the cooperation of the support chassis structure and welded into a finished metal fuel tank through the intelligent welding system.

[0009] Furthermore, the intelligent welding system includes a mounting frame, a weld tracker, a gun cleaning station and a multi-axis welding robot. The multi-axis welding robot is arranged at a welding station of the supporting chassis structure in a manner corresponding to the position of the oil tank fixing device through the mounting frame. The gun cleaning station is arranged on the supporting chassis structure in a manner corresponding to the position of the multi-axis welding robot. The welding head of the multi-axis welding robot is controlled by the weld tracker.

[0010] A preferred embodiment of the above scheme is that the supporting frame structure includes a base and a workbench, each set of oil inlet pipe assembly and holding components are movably arranged on the workbench through each set of oil tank fixing devices respectively and correspondingly, the base is separated into at least one assembly station and at least one welding station by the workbench movably arranged thereon, and the intelligent welding system is arranged on the base of the welding station corresponding to the position of the workbench.

[0011] Furthermore, the base is composed of a rectangular steel welding truss, and the intelligent welding system is arranged on the rectangular steel welding truss of the welding station corresponding to the position of the workbench.

[0012] A preferred embodiment of the above scheme is that the workbench includes a base frame, a rotating support drive assembly and a protective isolation plate, the base is separated into at least one assembly station and at least one welding station by the base frame, the intelligent welding system is arranged at the welding station of the rectangular steel welding truss in accordance with the position of the base frame, at least two sets of oil tank fixing devices are arranged symmetrically on the rotating support drive assembly, each set of oil tank fixing devices is separated by a protective isolation plate arranged on the rotating support drive assembly, and the rotating support drive assembly is rotatably arranged on the base frame along the circumferential direction around the axial center line.

[0013] Furthermore, the base frame is a square steel welded truss, and the protective isolation plate is composed of a brown acrylic plate.

[0014] A preferred embodiment of the above scheme is that the rotating support driving assembly includes a mounting plate and a driving servo motor with a reducer, the mounting plate is movably arranged on the base frame through the driving servo motor, the brown acrylic plate is radially arranged on the rotation center of the mounting plate, and each set of oil tank fixing devices are arranged on the mounting plate in symmetrical positions.

[0015] Furthermore, each set of fuel tank fixing devices respectively includes a tooling support, four sets of press-fit components and at least one locating pin. The four sets of press-fit components and each locating pin are arranged on the tooling support in accordance with the position of the metal fuel tank, and the fuel inlet pipe assembly retaining component is arranged on the tooling support in accordance with the position of the fuel inlet pipe to be assembled.

[0016] Preferably, each set of press-fitting components respectively includes a support block and at least one set of fuel tank pressing cylinders, and each set of fuel tank pressing cylinders is movably arranged at the corresponding position of the tooling support through the support block.

[0017] Furthermore, the inlet pipe assembly holding component includes a crimping installation rod and a set of pipe pressing cylinders, and the pipe pressing cylinders are arranged on the tooling support through the crimping installation rod to adapt to the position of the inlet pipe to be assembled.

[0018] The beneficial effects of the present utility model are as follows: The technical solution provided by this application is to set up a welding and assembly tooling including a support chassis structure, a fuel tank fixing device, an inlet pipe assembly holding component, and an intelligent welding system. Then, at least one assembly station and at least one welding station are set on the support chassis structure, and at least one set of fixing devices and at least one set of inlet pipe assembly holding components are respectively and movably arranged at the assembly station and the welding station of the support chassis structure. In this way, when welding the inlet pipe of the metal fuel tank, the metal fuel tank can be detachably arranged on the support chassis structure through the fuel tank fixing device first. Then, the inlet pipe to be assembled is press-fitted into the inlet pipe assembly hole of the metal fuel tank at the assembly station through the inlet pipe assembly holding component. The semi-finished metal fuel tank after assembly is transferred to the welding station with the cooperation of the support chassis structure and welded into a finished metal fuel tank through the intelligent welding system. This changes the situation of inconsistent assembly caused by manual assembly of the inlet pipe with the cooperation of the existing positioning workbench in the prior art. In this application, the inlet pipe is press-fitted into the inlet pipe assembly hole of the metal fuel tank through the inlet pipe assembly holding component with the cooperation of the support chassis structure, and then directly moved to the welding station with the cooperation of the support chassis structure and the welding work is completed with the cooperation of the intelligent welding system. This not only greatly improves the automation degree of inlet pipe welding and assembly, but also can effectively ensure the welding quality of the inlet pipe of the metal fuel tank. Description of the Drawings

[0019] Figure 1 It is a three-dimensional structure diagram of the welding and assembly tooling for the inlet pipe of the metal fuel tank of the present utility model;

[0020] Figure 2 It is a three-dimensional structure diagram of the assembly structure of the fuel tank fixing device and the inlet pipe assembly holding component related to the welding and assembly tooling for the inlet pipe of the metal fuel tank of the present utility model on the workbench frame.

[0021] The marks in the figure are: metal fuel tank 1, inlet pipe 2, mounting frame 3, seam tracker 4, gun cleaning station 5, multi-axis welding robot 6, base 7, chassis 8, protective isolation board 9, mounting plate 10, driving servo motor 11, tooling support 12, positioning pin 13, support block 14, fuel tank pressing cylinder 15, crimping installation rod 16, pipe pressing cylinder 17. Detailed implementation mode

[0022] As shown Figure 1 , Figure 2 in the figure is a welding and assembling tool for a metal fuel tank inlet pipe, which has a relatively high degree of automation and relatively good welding quality of the metal fuel tank inlet pipe. The welding and assembling tool includes a supporting chassis structure, a fuel tank fixing device, an inlet pipe assembling and holding component, and an intelligent welding system. At least one assembling station and at least one welding station are arranged on the supporting chassis structure, and at least one set of fixing devices and at least one set of inlet pipe assembling and holding components are respectively and movably arranged on the assembling station and the welding station of the supporting chassis structure; The metal fuel tank 1 is detachably arranged on the supporting chassis structure through the fuel tank fixing device. The inlet pipe 2 to be assembled is press-fitted into the inlet pipe assembling hole of the metal fuel tank 1 through the inlet pipe assembling and holding component at the assembling station. The semi-finished metal fuel tank after assembly is transferred to the welding station with the cooperation of the supporting chassis structure and welded into a finished metal fuel tank through the intelligent welding system. The technical solution provided in this application is to set up a welding and assembling tool including a supporting chassis structure, a fuel tank fixing device, an inlet pipe assembling and holding component, and an intelligent welding system, and then set at least one assembling station and at least one welding station on the supporting chassis structure, and respectively and movably arrange at least one set of fixing devices and at least one set of inlet pipe assembling and holding components on the assembling station and the welding station of the supporting chassis structure; In this way, when welding and assembling the inlet pipe of the metal fuel tank, the metal fuel tank can be first detachably arranged on the supporting chassis structure through the fuel tank fixing device, and then the inlet pipe to be assembled is press-fitted into the inlet pipe assembling hole of the metal fuel tank through the inlet pipe assembling and holding component at the assembling station. The semi-finished metal fuel tank after assembly is transferred to the welding station with the cooperation of the supporting chassis structure and welded into a finished metal fuel tank through the intelligent welding system. It changes the situation of inconsistent assembly caused by manual assembly of the inlet pipe with the cooperation of the existing positioning workbench in the prior art. In this application, the inlet pipe is press-fitted into the inlet pipe assembling hole of the metal fuel tank through the inlet pipe assembling and holding component with the cooperation of the supporting chassis structure, and then directly moved to the welding station with the cooperation of the supporting chassis structure and welded with the cooperation of the intelligent welding system, which not only greatly improves the automation degree of inlet pipe welding and assembling, but also can effectively ensure the welding quality of the metal fuel tank inlet pipe.

[0023] Combined with the existing technology, in order to adopt existing components as much as possible, especially the existing intelligent welding system, so as to improve the versatility of the welding and assembly tooling of the present application, reduce its production and manufacturing difficulty and production and manufacturing cost, the intelligent welding system described in the present application includes a mounting frame 3, a weld tracker 4, a gun cleaning station 5 and a multi-axis welding robot 6. The multi-axis welding robot 6 is arranged at the welding station of the support chassis structure through the mounting frame 3 in a manner adapted to the position of the fuel tank fixing device, the gun cleaning station 5 is arranged on the support chassis structure in a manner adapted to the position of the multi-axis welding robot 6, and the welding head of the multi-axis welding robot 6 is controlled by the weld tracker 4.

[0024] Correspondingly, in order to simplify the independent design and the structure of each component of the present application, facilitate manufacturing, installation and subsequent use and maintenance, the support chassis structure of the present application includes a base 7 and a workbench frame. Each set of inlet pipe assembly holding components are respectively arranged on the workbench frame through each set of fuel tank fixing devices in a movable manner. The base 7 separates at least one assembly station and at least one welding station through the workbench frame arranged on it in a movable manner. The intelligent welding system is arranged on the base 7 of the welding station corresponding to the position of the workbench frame. Each set of the fuel tank fixing devices respectively includes a tooling support 12, four sets of pressing components and at least one positioning pin 13. The four sets of pressing components and each positioning pin 13 are respectively arranged on the tooling support 12 in a manner adapted to the position of the metal fuel tank 1, and the inlet pipe assembly holding component is arranged on the tooling support 12 in a manner adapted to the position of the inlet pipe 2 to be assembled. The inlet pipe assembly holding component includes a crimping installation rod 16 and a set of oil pipe pressing cylinders 17. The oil pipe pressing cylinders 17 are arranged on the tooling support 12 in a manner adapted to the position of the inlet pipe 2 to be assembled through the crimping installation rod 16.

[0025] More specifically, the base 7 described in the present application is composed of a rectangular steel welded truss. The intelligent welding system is arranged on the rectangular steel welded truss of the welding station corresponding to the position of the workbench frame. The workbench frame includes a chassis 8, a rotary support drive assembly and a protective isolation plate 9. The base 7 separates at least one assembly station and at least one welding station through the chassis 8. The intelligent welding system is arranged on the welding station of the rectangular steel welded truss in a manner adapted to the position of the chassis 8. At least two sets of fuel tank fixing devices are symmetrically arranged on the rotary support drive assembly respectively. Each set of fuel tank fixing devices is separated by the protective isolation plate 9 arranged on the rotary support drive assembly. The rotary support drive assembly is arranged on the chassis 8 in a circumferentially rotatable manner around the axial center line. Each set of the pressing components respectively includes a support block 14 and at least one set of fuel tank pressing cylinders 15. Each set of fuel tank pressing cylinders 15 is arranged at the corresponding position of the tooling support 12 through the support block 14 in a movable manner.

[0026] At this time, the preferred method is that the chassis 8 is a square-shaped steel welded truss, and the protective isolation plate 9 is composed of brown acrylic plates. The rotary support drive assembly includes a mounting plate 10 and a drive servo motor 11 with a reducer. The mounting plate 10 is movably arranged on the chassis 8 through the drive servo motor 11. The brown acrylic plates are arranged radially on the rotation center of the mounting plate 10. Each set of fuel tank fixing devices are symmetrically arranged on the mounting plate 10 respectively.

[0027] In summary, the welding fixture provided by this application uses the positioning pins on the workbench as the positioning reference for the metal fuel tank, and the 4 pressing cylinders on both sides are used for pressing to ensure the firm and stable positioning of the metal fuel tank workpiece; the inlet pipe uses a cylinder in the vertical direction to fit the pipe orifice surface and is vertically pressed into the hole of the metal fuel tank to ensure close fit in the vertical direction. After the workpiece is installed, click the completion button, and the rotary workbench rotates from the installation station to the welding station. The laser weld tracking is used to identify the welding trajectory, and the robot completes the welding. After welding is completed, it rotates from the welding station to the installation station, and the materials are loaded and unloaded for cyclic operation. This equipment can manufacture special lightweight aluminum plate fixtures for different models according to different models of metal fuel tanks, and the whole is replaced. The changeover time is short, and only one person is required for operation. The workpieces are continuously loaded and unloaded in a cycle, and 2 workpieces can be welded in one cycle, which is convenient and efficient.

[0028] The technical solution of this application will be further described below through specific embodiments:

[0029] The position of the metal fuel tank is fixed through the positioning system composed of positioning pins and pressing cylinders; the inlet pipe and the fuel tank are closely fitted by pressing with a cylinder in the vertical direction. The high-precision rotation of the welding workpiece is realized through the rotatable system composed of a servo motor and a reducer. First, the workpiece is clamped at the loading station. After clamping, it rotates to the welding station. After welding is completed, it rotates back to the loading station, the workpiece is taken off and flows into the next process, and then another workpiece is assembled, and so on in a cycle. 2 metal fuel tank inlet pipes can be welded in one cycle. Through the application of this equipment, the labor intensity of employees for handling is reduced, the consistency of the welding positioning of the metal fuel tank inlet pipe is improved, and the qualified rate and efficiency of the inlet pipe welding are improved.

[0030] Embodiment 1

[0031] There are two cores in the solution of this application. The first is positioning, including the positioning of the metal fuel tank and the positioning of the inlet pipe. The fuel tank positioning is realized through the metal positioning pins on the aluminum fixture, and the cylinder rotates and expands to press the fuel tank; the positioning of the inlet pipe adopts plane fitting and vertical pressing to ensure the perpendicularity of the inlet pipe. The second is rotation, using a mounting servo motor and an RV reducer: the rotational accuracy of the reducer can reach 12 arc seconds, ensuring the position accuracy of the robot welding station.

[0032] Working principle of the welding tooling for the rotatable fuel inlet pipe of the metal fuel tank: The metal fuel tank enters the working area through the conveying rollers. The rotary table stays at the reference origin. The operator clamps the metal fuel tank into the positioning pins and clicks the completion button. Four cylinders rotate and clamp the metal fuel tank. The operator places the fuel inlet pipe into the fuel pipe hole above the fuel tank and clicks the completion button. The cylinder rotates and fits the upper end face of the fuel inlet pipe from the vertical direction and continues to press it into the fuel tank hole. After the assembly of the metal fuel tank and the fuel inlet pipe is completed, the servo motor starts to work. The entire tooling platform rotates 180°. The fuel inlet pipe welding robot starts to scan the mating weld of the metal fuel tank and the fuel inlet pipe and calculates the appropriate weld path. The welding robot completes the welding of the fuel inlet pipe according to the calculated weld path. While the fuel inlet pipe is being welded, the operator assembles the workpieces at another station for cyclic operation.

Claims

1. A welding tool for metal fuel tank inlet pipe, characterized by: The welding tool comprises a supporting chassis structure, a fuel tank fixing device, a fuel inlet pipe assembly and holding component and an intelligent welding system. At least one assembly station and at least one welding station are arranged on the supporting chassis structure. At least one set of fixing devices and at least one set of fuel inlet pipe assembly and holding components are respectively and movably arranged on the assembly station and welding station of the supporting chassis structure. The metal fuel tank (1) is detachably arranged on the supporting chassis structure through the fuel tank fixing device. The fuel inlet pipe (2) to be assembled is pressed into the fuel inlet pipe assembly hole of the metal fuel tank (1) at the assembly station through the fuel inlet pipe assembly and holding component. The assembled semi-finished metal fuel tank is transferred to the welding station with the cooperation of the supporting chassis structure and is welded into a finished metal fuel tank through the intelligent welding system.

2. The welding tool for metal fuel tank inlet pipe according to claim 1, characterized in that: The intelligent welding system comprises a mounting frame (3), a weld seam tracker (4), a gun cleaning station (5) and a multi-axis welding robot (6); the multi-axis welding robot (6) is arranged at a welding station of a supporting chassis structure in a manner that the mounting frame (3) is adapted to the position of an oil tank fixing device; the gun cleaning station (5) is arranged on the supporting chassis structure in a manner that the position of the multi-axis welding robot (6) is adapted; and the welding head of the multi-axis welding robot (6) is controlled by the weld seam tracker (4).

3. The welding tool for the metal fuel tank inlet pipe according to claim 1 or 2, characterized in that: The supporting chassis structure comprises a base (7) and a workbench, each set of oil inlet pipe assembly and holding components are movably arranged on the workbench through each set of oil tank fixing devices respectively, the base (7) is separated into at least one assembly station and at least one welding station through the workbench movably arranged thereon, and the intelligent welding system is arranged on the base (7) of the welding station corresponding to the position of the workbench.

4. The welding tool for metal fuel tank inlet pipe according to claim 3 is characterized in that: The base (7) is composed of a rectangular steel welding truss, and the intelligent welding system is arranged on the rectangular steel welding truss of the welding station corresponding to the position of the workbench.

5. The welding tool for metal fuel tank inlet pipe according to claim 4, characterized in that: The workbench frame comprises a base frame (8), a rotating support driving assembly and a protective isolation plate (9); the base (7) is separated into at least one assembly station and at least one welding station by the base frame (8); the intelligent welding system is arranged on the welding station of the rectangular steel welding truss in a position adapted to the base frame (8); at least two sets of oil tank fixing devices are arranged on the rotating support driving assembly in symmetrical positions; each set of oil tank fixing devices is separated by a protective isolation plate (9) arranged on the rotating support driving assembly; the rotating support driving assembly is arranged on the base frame (8) rotatably in the circumferential direction around the axial center line.

6. The welding tool for metal fuel tank inlet pipe according to claim 5, characterized in that: The base frame (8) is a square steel welded truss, and the protective isolation plate (9) is composed of a brown acrylic plate.

7. The welding tool for metal fuel tank inlet pipe according to claim 6, characterized in that: The rotary support driving assembly comprises a mounting plate (10) and a driving servo motor (11) with a reducer. The mounting plate (10) is movably arranged on a base frame (8) via the driving servo motor (11). A brown acrylic plate is radially arranged on the rotation center of the mounting plate (10). Each set of oil tank fixing devices is arranged on the mounting plate (10) in a mutually symmetrical manner.

8. The welding tool for metal fuel tank inlet pipe according to claim 7, characterized in that: Each set of fuel tank fixing devices comprises a tool support (12), four sets of press-fit components and at least one positioning pin (13); the four sets of press-fit components and each positioning pin (13) are arranged on the tool support (12) in accordance with the position of the metal fuel tank (1); and the fuel inlet pipe assembly holding component is arranged on the tool support (12) in accordance with the position of the fuel inlet pipe (2) to be assembled.

9. The welding tool for metal fuel tank inlet pipe according to claim 8, characterized in that: Each set of press-fitting components comprises a support block (14) and at least one set of oil tank pressing cylinders (15), and each set of oil tank pressing cylinders (15) is movably arranged at a corresponding position of the tooling support (12) through the support block (14).

10. The welding tool for metal fuel tank inlet pipe according to claim 9, characterized in that: The oil inlet pipe assembly and holding component comprises a crimping installation rod (16) and a set of oil pipe clamping cylinders (17). The oil pipe clamping cylinders (17) are arranged on a tooling support (12) in a manner adapted to the position of the oil inlet pipe (2) to be assembled via the crimping installation rod (16).

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