Laser welding device for automobile parts processing

Abstract

The present invention relates to the technical field of welding equipment, and discloses a laser welding device for processing automobile parts, which is used for processing automobile fuel tanks. The welding device includes a base, a workbench is provided in the middle of the base, a support assembly is installed on the workbench, and the support frame is also connected to a moving assembly, and the moving assembly includes a sliding seat and a gantry frame that moves along the X-axis, the Y-axis and the Z-axis, and the gantry frame can move along the length direction of the base; the welding device also includes a welding head, and the welding head seals the outer edge of the shell of the automobile fuel tank by laser welding. The present invention can increase the temperature of the welding area by filling with hot water during welding. Using hot water to fill during the welding process can reduce the accumulation of thermal stress inside the welded joint, reduce the generation of residual stress, and improve the strength and corrosion resistance of the welded joint.

Description

Technical Field

[0001] The invention relates to the field of welding equipment, and more particularly to a laser welding device for processing automobile parts. Background Art

[0002] The existing oil tank comprises an upper shell of the oil tank and a lower shell of the oil tank, and a flange pipeline of an oil inlet and a hole for installing an oil detection assembly are arranged on the upper shell;

[0003] During daily use of the fuel tank, the oil and oil vapor will generate greater pressure on the tank body and joints.

[0004] During long-term use, traditional automobile fuel tanks will crack and leak due to vehicle bumps or rust, especially the welding positions of the fuel tanks. Traditional welding positions will accumulate thermal stress, and the strength and corrosion resistance will not reach the best during use. Summary of the invention

[0005] The present invention provides a laser welding device for processing automobile parts, which solves the technical problem in the related art that due to vehicle bumps or rust, especially the welding position of the fuel tank, the traditional welding position may accumulate thermal stress, resulting in cracks, damage and leakage.

[0006] The present invention provides a laser welding device for processing automobile parts, which is used for processing automobile fuel tanks. The welding device comprises a base, a workbench is arranged in the middle of the base, a support assembly is installed on the workbench, and the support frame is also connected to a moving assembly. The moving assembly comprises a sliding seat and a gantry frame that move along the X-axis, the Y-axis and the Z-axis, and the gantry frame can move along the length direction of the base;

[0007] The welding device also includes a welding head, which seals the outer edge of the shell of the automobile fuel tank by laser welding;

[0008] The support assembly includes a support frame and a clamping fixture, the automobile fuel tank is horizontally arranged on the support frame, the clamping fixture is installed on the support frame, and the end of the clamping fixture is clamped on the outer wall of the outer edge of the shell of the automobile fuel tank;

[0009] A flip assembly is provided on the workbench, which can drive the automobile oil tank on the workbench to rotate 180°, wherein the flip assembly includes an adsorption panel, a servo motor and a panel seat, the output shaft of the servo motor is connected to the panel seat, and the adsorption panel is vertically installed on the panel seat;

[0010] The welding device includes a water injection assembly, which includes a lifting frame, a suction pump and a control valve. The control valve is installed on the water injection pipeline of the suction pump. The lifting frame can drive the water injection pipeline of the suction pump to move up and down. The suction pump can extract and release the detection liquid from the inside of the pressed upper shell and lower shell of the oil tank.

[0011] There is also a detection component on the workbench, which includes a lifting cylinder, a pressure gauge, a liquid level sensor and a sealing ring. The sealing ring is installed on the outside of the bottom end of the pressure gauge, and the lifting cylinder is installed on the outer wall of the sealing ring. The lifting cylinder drives the sealing ring to move in the vertical direction, and the pressure gauge is pressed into the mounting hole on the automobile fuel tank. When the sealing ring blocks the mounting hole, the liquid level sensor detects the liquid level of the detection liquid in the automobile fuel tank.

[0012] Furthermore, the automobile fuel tank includes an upper tank shell, a lower tank shell, a tank port and mounting holes for installing a fuel pump and a fuel sensor. The four outer sides of the upper tank shell and the lower tank shell are provided with shell outer edges, and the shell outer edges are sealed by a laser machine head.

[0013] Furthermore, a fuel tank filling pipe is installed on the fuel tank opening, and a threaded structure is provided at the end of the fuel tank filling pipe, and the threaded structure is used to install the fuel tank cap.

[0014] Furthermore, a heating source is provided on the adsorption panel, and the heating source can heat the outer wall of the oil tank.

[0015] Furthermore, the lifting frame includes a lifting cylinder and a mounting frame, the mounting frame is mounted on one end of the piston rod of the lifting cylinder, and the water injection pipeline is clamped on the mounting frame.

[0016] Furthermore, the laser welding device also includes a sensor group. An installation station is provided on the base. The sensor group is arranged on the installation station for monitoring the detection process. The sensor group includes a sensor for detecting a steam overflow state and a sensor for detecting a detection liquid overflow state.

[0017] Furthermore, the laser welding device also includes a transfer component, which transfers the upper shell of the fuel tank to just above the lower shell of the fuel tank, so that the outer edges of the upper shell of the fuel tank and the lower shell of the fuel tank correspond to each other.

[0018] Furthermore, the transfer assembly includes a mechanical arm, a suction cup is provided at the end of the mechanical arm, and the suction cup is used to transfer the shell structure of the oil tank. A station for installing the mechanical arm is provided on the base.

[0019] Furthermore, the clamping fixture includes two groups of clamping plates, the inner side walls of the two groups of clamping plates are provided with high temperature resistant rubber blocks, and the outer side walls of the clamping plates are provided with opening and closing cylinders, which can drive the two clamping plates to move toward or relative to each other.

[0020] Furthermore, independent power sources of the sliding seat on the X-axis, Y-axis and Z-axis are installed on the sliding seat, and the three groups of independent power sources are the first cylinder, the second cylinder and the third cylinder respectively.

[0021] The beneficial effects of the present invention are:

[0022] During welding, the temperature of the welding area can be increased by filling with hot water. Using hot water to fill the welding area during the welding process can reduce the accumulation of thermal stress inside the welding joint and reduce the generation of residual stress. Controlling the temperature and thermal stress in the welding area can improve the efficiency of laser welding. At the same time, filling with hot water can help the welding area maintain a suitable temperature, which is helpful for grain refinement and homogenization of the welding joint and improves the strength and corrosion resistance of the welding joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a laser welding device for automobile parts processing proposed by the present invention;

[0024] Figure 2 The present invention Figure 1 A top view of

[0025] Figure 3 The present invention Figure 1 Side view of

[0026] Figure 4 The present invention Figure 1 Schematic diagram of the connection structure between the middle support component and the moving component;

[0027] Figure 5 The present invention Figure 2 The structural diagram of the middle flip assembly;

[0028] Figure 6 It is a structural schematic diagram of an automobile fuel tank in a laser welding device for automobile parts processing proposed by the present invention;

[0029] Figure 7 The present invention Figure 6 Side view of.

[0030] In the figure: 100, automobile fuel tank; 110, fuel tank upper shell; 120, fuel tank lower shell; 130, shell outer edge; 140, mounting hole; 150, fuel tank filling pipe; 200, base; 210, workbench; 300, portal frame; 400, support assembly; 410, support frame; 420, clamping fixture; 500, welding head; 600, detection assembly; 610, sealing ring; 620, liquid level sensor; 630, pressure gauge; 700, water injection assembly; 710, water injection pipeline; 720, control valve; 730, suction pump; 740, lifting frame; 800, flip assembly; 810, servo motor; 820, panel seat; 830, adsorption panel; 900, moving assembly; 910, first cylinder; 920, second cylinder; 930, third cylinder. DETAILED DESCRIPTION

[0031] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0032] See also Figure 1-Figure 7 As shown, a laser welding device for processing automobile parts, wherein the workpiece to be processed by the laser welding device is an automobile fuel tank 100, and the automobile fuel tank 100 includes a fuel tank upper shell 110, a fuel tank lower shell 120, a fuel tank port and a mounting hole 140 for mounting a fuel pump and a fuel sensor;

[0033] The four outer sides of the upper shell 110 and the lower shell 120 of the fuel tank are provided with shell outer edges 130, and the shell outer edges 130 are sealed by laser welding;

[0034] It should be supplemented that a fuel tank filling pipe 150 is installed on the fuel tank port, and a threaded structure is provided at the end of the fuel tank filling pipe 150, and the threaded structure is used to install the fuel tank cap;

[0035] In one embodiment of the present invention, the welding device includes a welding head 500, which can continuously seal the outer edge 130 of the housing;

[0036] The laser welding device also includes a base 200, a workbench 210 is provided in the middle of the base 200, a support assembly 400 is installed on the workbench 210, and the support frame 410 is also connected to a moving assembly 900, and the moving assembly 900 includes but is not limited to a sliding seat that moves along the X-axis, the Y-axis and the Z-axis, and the power sources of the sliding seats on the X-axis, the Y-axis and the Z-axis are all independent power sources; the moving assembly 900 is also used in conjunction with a gantry 300, and the gantry 300 can move along the length direction of the base 200; the support assembly 400 includes a support frame 410 and a clamping fixture 420, the lower shell 120 of the oil tank is horizontally arranged on the support frame 410, the clamping fixture 420 is installed on the support frame 410, and the end of the clamping fixture 420 is clamped on the outer wall of the outer edge 130 of the shell;

[0037] The clamping fixture 420 includes but is not limited to two sets of clamping plates, the inner side walls of the two sets of clamping plates are provided with high temperature resistant rubber blocks, and the outer side walls of the clamping plates are provided with opening and closing cylinders, which can drive the two clamping plates to move toward or relative to each other;

[0038] It should be noted that the independent power sources of the sliding seats on the X-axis, Y-axis and Z-axis installed on the sliding seat are the first cylinder 910, the second cylinder 920 and the third cylinder 930 respectively;

[0039] It should be noted that a flip assembly 800 is provided on the workbench 210, and the flip assembly 800 can drive the automobile fuel tank 100 on the workbench 210 to rotate 180°, wherein the flip assembly 800 includes but is not limited to an adsorption panel 830, a servo motor 810 and a panel seat 820, the output shaft of the servo motor 810 is connected to the panel seat 820, and the adsorption panel 830 is vertically mounted on the panel seat 820;

[0040] The laser welding device further includes a transfer assembly, which is clamped on the upper shell 110 of the oil tank and transferred to the upper part of the lower shell 120 of the oil tank, so that the outer edges 130 of the upper shell 110 and the lower shell 120 of the oil tank correspond to each other;

[0041] It should be supplemented that the transfer assembly includes but is not limited to a mechanical arm, a suction cup is provided at the end of the mechanical arm, and the suction cup is used to transfer the shell structure of the oil tank, and a station for installing the mechanical arm is provided on the base 200;

[0042] A heating source is also provided on the adsorption panel 830, and the heating source can heat the outer wall of the oil tank, and the heating source includes but is not limited to an electric heating element;

[0043] The laser welding device includes a water injection assembly 700, which includes a lifting frame 740, a suction pump 730 and a control valve 720. The control valve 720 is installed on the water injection pipe 710 of the suction pump 730. The lifting frame 740 can drive the water injection pipe 710 of the suction pump 730 to move up and down. The suction pump 730 can extract and discharge the detection liquid from the pressed oil tank upper shell 110 and the oil tank lower shell 120. The detection liquid includes but is not limited to pure water.

[0044] It should be noted that the lifting frame 740 includes a lifting cylinder and a mounting frame, the mounting frame is mounted on one end of the piston rod of the lifting cylinder, and the water injection pipe 710 is clamped on the mounting frame;

[0045] The laser welding device is provided with a detection assembly 600 on the workbench 210. The detection assembly 600 includes a lifting cylinder, a pressure gauge 630 and a sealing ring 610. The sealing ring 610 is installed on the outer edge of the bottom end of the pressure gauge 630. The lifting cylinder is installed on the outer wall of the sealing ring 610. The lifting cylinder drives the sealing ring 610 to move along the vertical direction. The pressure gauge 630 is pressed into the mounting hole 140. The sealing ring 610 blocks the mounting hole 140. At the same time, the liquid level sensor 620 installed below the sealing ring 610 can detect the height of the liquid level in the automobile fuel tank 100.

[0046] During the welding and testing process, the tank cap is installed for operation;

[0047] In one embodiment of the present invention, the laser welding device further includes a sensor group. A mounting station is provided on the base 200. The sensor group is provided on the mounting station for monitoring the detection process. The sensor group includes a sensor for detecting the steam overflow state and a sensor for detecting the detection liquid overflow state. The sensor group is a prior art, and its working principle is not described in detail.

[0048] It can also be assisted by a CCD, through which the state of the automobile fuel tank 100 is detected, thereby improving the detection accuracy;

[0049] The working process of this laser welding device is as follows:

[0050] 1. Place the lower shell 120 of the oil tank on the fixed frame on the support frame 410 by using the transfer assembly, detect the state of the lower shell 120 of the oil tank by using the CCD, and then fix the upper shell 110 of the oil tank accordingly by using the transfer assembly;

[0051] Specifically, the fuel tank lower shell 120 is horizontally placed on the support frame 410, and then the fuel tank upper shell 110 is transferred to the upper part of the fuel tank lower shell 120 by using the transfer assembly, and the fuel tank lower shell 120 is maintained horizontally by using the clamping fixture 420;

[0052] 2. The outer edges 130 of the pressed tank lower shell 120 and the tank upper shell 110 are clamped by a clamping fixture 420 to prevent edge warping caused by high temperature generated by laser welding;

[0053] 3. The testing liquid is poured into the interior of the automobile fuel tank 100 through the fuel tank opening through the water injection assembly 700. The poured testing liquid is continuously heated by the external heating source. The automobile fuel tank 100 is heated by the heat conduction of the heated testing liquid, thereby reducing the risk of thermal deformation caused by the rapid temperature rise and fall of the welding part;

[0054] 4. Then, laser welding is performed through the welding head 500. The heat generated by the laser welding is transferred to the detection liquid in the fuel tank. The detection liquid is vaporized and overflows to the installation hole 140 of the fuel tank. At this time, the installation hole 140 is blocked with a barometer 630. This state is used to simulate the pressure of the oil on the automobile fuel tank 100 when the fuel tank is fully loaded, especially the welding position of the upper shell 110 and the lower shell 120 of the fuel tank;

[0055] Specifically, the connection of the outer edge 130 of the shell is welded by the welding head 500, and then the outer edge 130 of the shell on the bottom side is welded, so that the upper and lower sides of the outer edge 130 of the shell are welded and fixed, and the flip assembly 800 drives the fixed frame and the automobile fuel tank 100 fixed thereon to rotate through the servo motor 810. After rotating 180 degrees, the automobile fuel tank 100 still remains horizontal;

[0056] During the welding process, the internal hot water is always filled. The filling state here is not completely filled. There is still some space at the top of the liquid level to accommodate some vaporized steam. At the same time, the hot water can conduct heat to the body of the automobile tank 100 and conduct the heat generated by the laser welding to the detection liquid in the tank.

[0057] 5. After the laser welding operation, the clamping fixture 420 of the outer edge 130 of the shell is loosened. If the test liquid does not overflow the weld of the oil tank shell, it means that the weld position can withstand the hydraulic state of full oil;

[0058] 6. Then, the detection liquid in the oil tank is extracted to make the liquid level of the detection liquid drop to the bottom of the weld, and then the hot water is heated to generate a large amount of steam, which is filled into the welded oil tank, simulating the oil vapor filled state in the automobile oil tank 100, and the weld position is subjected to steam detection. During the detection process, if the steam does not overflow from the weld, it means that the weld position has passed the steam detection;

[0059] It should be noted that the temperature of the oil vapor in the automobile fuel tank 100 is approximately between 80°C and 100°C, and the heated vaporization of the detection liquid can simulate the working condition of the automobile fuel tank 100 being filled with oil vapor;

[0060] 7. After the steam test is passed, it means that the automobile fuel tank 100 is welded and formed, and the material is cut to realize the welding operation of the next automobile fuel tank 100.

[0061] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A laser welding device for automobile parts processing, characterized in that: Used for processing an automobile oil tank (100), the welding device comprises a base (200), a workbench (210) is arranged in the middle of the base (200), a support assembly (400) is installed on the workbench (210), the support frame (410) is also connected to a moving assembly (900), the moving assembly (900) comprises a sliding seat and a portal frame (300) that move along an X-axis, a Y-axis and a Z-axis, and the portal frame (300) can move along the length direction of the base (200); The welding device also includes a welding head (500), and the welding head (500) seals the outer edges (130) of the shell of the automobile fuel tank (100) by laser welding; The support assembly (400) comprises a support frame (410) and a clamping fixture (420), the automobile fuel tank (100) is horizontally arranged on the support frame (410), the clamping fixture (420) is installed on the support frame (410), and the end of the clamping fixture (420) is clamped on the outer wall of the outer edge (130) of the shell of the automobile fuel tank (100); A flip assembly (800) is provided on the workbench (210), and the flip assembly (800) can drive the automobile oil tank (100) on the workbench (210) to rotate 180 degrees, wherein the flip assembly (800) comprises an adsorption panel (830), a servo motor (810) and a panel seat (820), the output shaft of the servo motor (810) is connected to the panel seat (820), and the adsorption panel (830) is vertically mounted on the panel seat (820); The welding device comprises a water injection assembly (700), the water injection assembly (700) comprising a lifting frame (740), a suction pump (730) and a control valve (720), the control valve (720) being installed on a water injection pipeline (710) of the suction pump (730), the lifting frame (740) being able to drive the water injection pipeline (710) of the suction pump (730) to be lifted and lowered, and the suction pump (730) being able to extract and release the detection liquid from the inside of the pressed oil tank upper shell (110) and the oil tank lower shell (120); A detection assembly (600) is also provided on the workbench (210). The detection assembly (600) includes a lifting cylinder, a pressure gauge (630), a liquid level sensor (620) and a sealing ring (610). The sealing ring (610) is installed on the outer edge of the bottom end of the pressure gauge (630). The lifting cylinder is installed on the outer wall of the sealing ring (610). The lifting cylinder drives the sealing ring (610) to move along the vertical direction. The pressure gauge (630) is pressed into the mounting hole (140) on the automobile fuel tank (100). When the sealing ring (610) blocks the mounting hole (140), the liquid level sensor (620) detects the liquid level height of the detection liquid in the automobile fuel tank (100).

2. A laser welding device for automobile parts processing according to claim 1, characterized in that: The automobile fuel tank (100) comprises a fuel tank upper shell (110), a fuel tank lower shell (120), a fuel tank port and a mounting hole (140) for mounting a fuel pump and a fuel sensor. The four outer sides of the fuel tank upper shell (110) and the fuel tank lower shell (120) are provided with shell outer edges (130), and the shell outer edges (130) are sealed by a laser machine head.

3. A laser welding device for automobile parts processing according to claim 2, characterized in that: An oil tank filling pipe (150) is installed on the oil tank opening, and a thread structure is provided at the end of the oil tank filling pipe (150), and the thread structure is used to install the oil tank cover.

4. A laser welding device for automobile parts processing according to claim 3, characterized in that: A heating source is also provided on the adsorption panel (830), and the heating source can heat the outer wall of the oil tank.

5. The laser welding device for automobile parts processing according to claim 4, characterized in that: The lifting frame (740) comprises a lifting cylinder and a mounting frame, wherein the mounting frame is mounted on one end of the piston rod of the lifting cylinder, and the water injection pipeline (710) is clamped on the mounting frame.

6. The laser welding device for automobile parts processing according to claim 5, characterized in that: The laser welding device also includes a sensor group. An installation station is provided on the base (200). The sensor group is arranged on the installation station and is used to monitor the detection process. The sensor group includes a sensor for detecting the steam overflow state and a sensor for detecting the detection liquid overflow state.

7. The laser welding device for automobile parts processing according to claim 6 is characterized in that: The laser welding device also includes a transfer component, which transfers the oil tank upper shell (110) to directly above the oil tank lower shell (120) so that the shell outer edges (130) of the oil tank upper shell (110) and the oil tank lower shell (120) correspond to each other.

8. The laser welding device for automobile parts processing according to claim 7, characterized in that: The transfer assembly comprises a mechanical arm, a suction cup is provided at the end of the mechanical arm, and the suction cup is used to transfer the shell structure of the oil tank. A station for installing the mechanical arm is provided on the base (200).

9. The laser welding device for automobile parts processing according to claim 8, characterized in that: The clamping fixture (420) comprises two groups of clamping plates, the inner side walls of the two groups of clamping plates are provided with high temperature resistant rubber blocks, and the outer side walls of the clamping plates are provided with opening and closing cylinders, which can drive the two clamping plates to move towards or relative to each other.

10. The laser welding device for automobile parts processing according to claim 9, characterized in that: Independent power sources for the sliding seats on the X-axis, Y-axis and Z-axis are installed on the sliding seat, and the three groups of independent power sources are respectively a first cylinder (910), a second cylinder (920) and a third cylinder (930).

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