Welding gun rotating mechanism for complex welding structure

Abstract

The utility model relates to the technical field of laser hybrid welding equipment, in particular to a welding gun rotating mechanism for a complex welding structure, which comprises a mounting seat, a driving motor, a transmission component and a guide component. Automatic rotation of the electric arc welding gun of the electric arc welding device can be achieved, namely, the electric arc welding angle can be independently and automatically adjusted, the adjusting accuracy is high, especially in the welding process of welding parts with symmetrical welding seams, manual adjustment of the welding posture of the electric arc welding device is reduced, time and labor are saved, adjusting and welding operation is convenient and fast, and the welding efficiency is improved. The working efficiency is greatly improved; and meanwhile, it can be effectively guaranteed that the same welding condition and welding posture are adopted for the two symmetrical welding seams, the precision is high, and the welding quality of the welding seams is improved. The laser welding device is arranged on the mounting base, the adjusting assembly is arranged, the positions of the laser welding device in different directions can be adjusted, automatic adjustment is achieved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser composite welding equipment, in particular to a welding gun rotating mechanism for a complex welding structure. Background Art

[0002] Laser-arc hybrid welding is an advanced welding process that combines laser welding and arc welding. It fully utilizes the high energy density and deep melting ability of the laser beam and the arc heat source supplementary heating and wire feeding filling functions of arc welding to obtain a larger welding penetration and realize an efficient and high-quality welding process.

[0003] In the process of welding complex welding structures such as workpieces with multiple welds, multiple joints and multiple welding postures by laser-arc hybrid welding, the welding angle needs to be adjusted each time welding because the welding postures of laser and arc welding are different. In the prior art, a manipulator is used to adjust the angle of the overall welding system, but it cannot meet the requirements of laser welding and arc welding angles at the same time, so manual adjustment is still required. For mass-produced welding workpieces, the adjustment process is cumbersome, time-consuming and labor-intensive, affecting production efficiency; at the same time, manual adjustment is prone to poor accuracy, large welding errors, and poor weld quality. Therefore, based on the above problems, the prior art needs to be further improved. Utility Model Content

[0004] The utility model aims to provide a welding gun rotating mechanism for a complex welding structure, so as to solve the prior art problems existing in the above-mentioned background technology.

[0005] In order to solve the above-mentioned technical problems, the technical solution provided by the utility model is as follows: a welding gun rotation mechanism for a complex welding structure is provided, comprising a mounting seat, a drive motor, a transmission assembly and a guide assembly, wherein the drive motor is fixedly arranged on the arc welding gun of the arc welding device, and the drive motor drives the arc welding gun to rotate relative to the mounting seat through the transmission assembly, and the guide assembly is arranged between the arc welding device and the transmission assembly, and is used for rotation guiding of the arc welding device.

[0006] Based on the above technical solution, the transmission assembly includes a transmission gear and an arc-shaped rack. The transmission gear is fixedly arranged at the output end of the driving motor and is driven to rotate by the driving motor. The arc-shaped rack is fixedly arranged on the mounting seat, and the transmission gear is meshed with the arc-shaped rack.

[0007] Based on the above technical solution, the guide assembly includes an arcuate slide rail and a slider, the arcuate slide rail is fixedly arranged on a mounting seat, the slider is arranged at the bottom end of the driving motor, and the slider is slidably connected to the arcuate slide rail.

[0008] On the basis of the above technical solution, the driving motor is fixedly mounted on the arc welding gun through a connecting piece, the sliding block is fixedly arranged on the connecting piece, and the sliding block is adapted to the arc-shaped sliding rail.

[0009] On the basis of the above technical solution, it also includes an adjustment component arranged on the mounting base, and the adjustment component includes a first drive unit, a second drive unit and a third drive unit, which are respectively used to drive the arc welding device to move in the x-axis, y-axis and z-axis directions, and the first drive unit, the second drive unit and the third drive unit have the same composition structure.

[0010] Based on the above technical solution, the first driving part includes a first motor, a first screw and a first nut. The first motor is arranged on a mounting seat, the first screw is driven to rotate by the first motor, the first nut is sleeved on the first screw and is slidably connected, the second driving part is arranged on the first nut of the first driving part, and the third driving part is arranged on the second nut of the second driving part.

[0011] Based on the above technical solution, the rotation angle range of the arc welding gun of the arc welding device is -70°-70°.

[0012] The beneficial effects of the technical solution provided by the utility model are:

[0013] 1. The present application provides a welding gun rotation mechanism, which can realize the automatic rotation of the arc welding gun of the arc welding device, that is, to realize the independent automatic adjustment of the arc welding angle, with high adjustment accuracy, and is suitable for the welding process of complex welding structures such as welding parts with multiple welds, multiple joints and multiple welding posture requirements. The welding postures required for different welds are the same or different, and automatic adjustment can be achieved when switching between different welding postures. This can reduce the manual adjustment of the welding posture of the arc welding device, save time and effort, and make the adjustment and welding operations convenient and fast, greatly improving work efficiency. At the same time, it can also effectively ensure that different welds adopt the required welding conditions and welding postures, with high accuracy, and improve the welding quality of the welds.

[0014] 2. In this embodiment, an adjustment device is provided on the mounting base, so that the relative position of the arc welding device with respect to other equipment such as a laser welding device can be adjusted, so as to facilitate the adjustment of the overall welding process parameters such as light wire centering, light wire spacing, and relative height during the laser composite welding process. No manual adjustment is required, so that automatic adjustment is realized, work efficiency is improved, and adjustment accuracy and weld quality are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of Example 2 of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of another angle of embodiment 2 of the present utility model;

[0018] Figure 4 It is a structural schematic diagram of the adjustment component in the utility model;

[0019] Figure 5 It is a structural schematic diagram of the first driving part in the utility model;

[0020] Figure 6 It is the welding posture of the laser beam and the arc welding gun in the laser hybrid welding process;

[0021] Figure 7 yes Figure 6 Section view at AA in the middle;

[0022] Figure 8 It is a schematic diagram of the principle of the rotation axis and the vertical plane in the utility model; the arrow on the left represents the laser beam, and the arrow on the right represents the position of the arc welding gun;

[0023] Fig. 9 It is a schematic diagram of the welding posture transformation process of the symmetrical weld in the utility model; DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] Example 1

[0028] like Figures 1 to 6As shown, a welding gun rotation mechanism for a complex welding structure includes a mounting base 1, a drive motor 2, a transmission assembly 3 and a guide assembly 4. The drive motor 2 is fixedly arranged on the arc welding gun of the arc welding device 10. The drive motor 2 drives the arc welding gun to rotate relative to the mounting base through the transmission assembly 3. The guide assembly 4 is arranged between the arc welding device 10 and the transmission assembly 3, and is used for rotational guidance of the arc welding device 10.

[0029] The present application provides a welding gun rotation mechanism, which can realize the automatic rotation of the arc welding gun of the arc welding device 10, that is, to realize the independent automatic adjustment of the arc welding angle, with high adjustment accuracy, and is suitable for complex welding structures such as welding parts with multiple welds, multiple joints and multiple welding posture requirements. In the welding process, the welding postures required for different welds are the same or different, and automatic adjustment can be achieved when switching between different welding postures. This can reduce the manual adjustment of the welding posture of the arc welding device, save time and effort, and make the adjustment and welding operations convenient and quick, greatly improving work efficiency. At the same time, it can also effectively ensure that different welds adopt the required welding conditions and welding postures with high accuracy, thereby improving the welding quality of the welds.

[0030] Preferably, in this embodiment, the laser welding device 20 is arranged on the mounting seat 1, that is, during the laser hybrid welding process, the arc welding gun can achieve independent angle adjustment relative to the laser welding device 20, adjust the relative angle value between the arc welding gun and the laser beam, realize automatic rotation of the arc welding gun, meet the welding angle of the arc welding gun, and make the adjustment process more convenient. In addition, during the rotation of the arc welding gun, the center of rotation of the arc welding gun is always the end of the arc welding wire, the end of the arc welding wire does not move, and maintains a fixed distance from the action point of the laser beam, which can ensure that key welding process parameters such as the light wire spacing remain unchanged, thereby ensuring the welding quality of the weld.

[0031] In other more preferred embodiments, the mounting base can be installed on other equipment that requires an arc welding device, and is not limited to being used in conjunction with a laser welding device, and has a wider range of applications.

[0032] Based on the above technical solution, the transmission assembly 3 includes a transmission gear 31 and an arc-shaped rack 32. The transmission gear 31 is fixedly arranged at the output end of the driving motor 2 and is driven to rotate by the driving motor 2. The arc-shaped rack 32 is fixedly arranged on the mounting seat, and the transmission gear 31 is meshed with the arc-shaped rack 32.

[0033] Based on the above technical solution, the guide assembly 4 includes an arcuate slide rail 41 and a slider 42 . The arcuate slide rail 41 is fixedly arranged on the mounting seat 1 , and the slider 42 is arranged at the bottom end of the driving motor 2 . The slider 42 is slidably connected to the arcuate slide rail 41 .

[0034] On the basis of the above technical solution, the driving motor 2 is fixedly mounted on the arc welding gun via the connecting member 5 , the sliding block 42 is fixedly arranged on the connecting member 5 , and the sliding block 42 is matched with the arc-shaped slide rail 41 .

[0035] Specifically, in the present application, the driving motor 2 is fixed to the arc welding gun of the arc welding device 10 through the connecting member 5, and the driving motor 2 drives the transmission gear 31 to rotate, and the transmission gear 31 is engaged with the arc rack 32, thereby driving the arc welding gun to rotate relative to the mounting base 1 and rotate to the angle required for arc welding; at the same time, an arc slide rail 41 is fixedly provided on the arc rack 32, and a slider 42 is provided on the connecting member 5. During the rotation of the arc welding device 10, the slider 42 slides accordingly in the arc slide rail 41, which plays a good guiding role, thereby ensuring that the arc welding device 10 runs more smoothly during the angle adjustment process and ensuring the accuracy of its angle adjustment.

[0036] In other more preferred embodiments, the transmission assembly may take other forms as long as the rotation of the arc welding gun can be achieved. At the same time, the guide assembly may also take other common guide structure forms in the mechanical field to achieve smooth rotation of the arc welding gun.

[0037] Based on the above technical solution, the rotation angle range of the arc welding gun of the arc welding device 10 is -70°-70°. The arc welding device 10 in the present application can achieve an angle rotation range of -70°-70°, which is suitable for most laser-arc hybrid welding processes, has a wide adjustment range, convenient operation process, and better applicability; the angle can be adjusted according to actual working conditions, which is more convenient to use.

[0038] Example 2

[0039] Based on the technical solution of the above-mentioned embodiment 1, it also includes an adjustment component 6 arranged on the mounting base 1, and the adjustment component 6 includes a first driving part 61, a second driving part 62 and a third driving part 63, which are respectively used to drive the arc welding device 10 to move in the x-axis, y-axis and z-axis directions, and the first driving part 61, the second driving part 62 and the third driving part 63 have the same composition structure.

[0040] Based on the above technical solution, the first driving part 61 includes a first motor 611, a first lead screw 612 and a first nut 613. The first motor 611 is arranged on the mounting seat 1, and the first lead screw 612 is driven to rotate by the first motor 611. The first nut 613 is sleeved on the first lead screw 612 and is slidably connected. The second driving part 62 is arranged on the first nut 613 of the first driving part 61, and the third driving part 63 is arranged on the second nut of the second driving part 62. The laser welding device 20 is arranged on the third nut of the third driving part 63.

[0041] In this embodiment, a laser welding device 20 is arranged on the mounting seat 1, and the relative angle value of the arc welding device 10 relative to the laser welding device 20 can be adjusted through the welding gun rotation mechanism. At the same time, an adjustment component 6 is arranged between the laser welding device 20 and the mounting seat 1, and the position of the arc welding device 10 in different directions can be adjusted, that is, the relative position between the arc welding device 10 and the laser welding device 20 is adjusted, which facilitates the adjustment of the overall welding process parameters in the laser hybrid welding process, and does not require manual adjustment, so that automatic adjustment is realized, work efficiency is improved, and adjustment accuracy and weld quality are improved.

[0042] Specifically, by providing a first drive unit 61, a second drive unit 62 and a third drive unit 63, the position adjustment of the arc welding device 10 in the three-dimensional directions of the x-axis, y-axis and z-axis can be realized. In the laser-arc hybrid welding process, the first drive unit 61 is used to realize the centering adjustment of the light wire, that is, to ensure that the laser beam action point of the laser welding device 20 and the end of the arc welding wire are centered in the x-axis direction, that is, the line connecting the laser beam action point and the end point of the arc welding wire is parallel to the weld; the second drive unit 62 is used to control the position adjustment of the arc welding device 10 in the y-axis direction, so as to realize the adjustment of the light wire spacing, that is, the arc welding wire The distance between the arc welding device 10 and the point of action of the laser beam; the position adjustment of the arc welding device 10 in the z-axis direction, that is, the high and low position of the arc welding device 10, is controlled by the third driving unit 63 to adapt to the relative change of the height of the laser beam action point. In this embodiment, since the laser defocus amount is achieved by using a manipulator to drive the height change of the laser head of the laser welding device 20, and the height of the arc welding device 10 also changes accordingly, the adjustment component 6 is used to adjust the relative height of the arc welding device 10 in the z-axis direction when the arc welding height needs to be met, so as to achieve adaptation to the height position of the laser beam action point.

[0043] Preferably, the first driving part 61, the second driving part 62 and the third driving part 63 are all driven by a motor, a screw and a nut, and can drive the laser welding device 20 to move in three dimensions by being arranged in the x-axis, y-axis and z-axis directions respectively.

[0044] It should be noted that in the laser hybrid welding process, the defocus refers to the distance between the laser beam focus and the welding workpiece relative to the workpiece surface, that is, the position of the laser welding device in the z-axis direction. In this embodiment, a manipulator can be used to adjust the position of the laser welding device; the wire spacing refers to the distance between the laser beam focus and the arc welding wire. The x-axis, y-axis, and z-axis mentioned above are based on the attached Figure 4 The definitions are only for the convenience of describing and understanding the technical solutions of the present application and do not constitute a limitation to the present application.

[0045] Example 3

[0046] In this embodiment, batch welding of welded parts with symmetrical welds, such as welding of a U-shaped structure workpiece with two T-shaped weld joints, is described as an example.

[0047] like Figure 6 and Figure 7 As shown, in this embodiment, when there are two welds that need to be welded, the welding direction needs to be kept the same. In particular, for welded parts with two symmetrical T-shaped weld structures, when laser-arc hybrid welding is used, the postures of the laser and the arc are different, and manual adjustment is required for each welding. For batch-produced welding workpieces, the adjustment process is cumbersome, time-consuming and labor-intensive, affecting production efficiency. At the same time, manual adjustment is prone to errors in key parameters such as welding angles and light wire spacing, affecting the final weld quality, that is, affecting the different welding qualities of the symmetrical welds on both sides, affecting the production quality of the welded workpiece.

[0048] Take the U-shaped welding workpiece as an example, which includes two symmetrical T-shaped welding joints on the left and right. Fig. 9 The figure shows the adjustment process of the welding posture of the laser beam and the arc welding gun in the welding process of two symmetrical welds; for example, the laser beam angle α required by the laser welding process is 10°, and the arc welding gun angle β required in the arc welding process is 45°; before welding, the defocus amount needs to be determined and adjusted, and the position of the laser welding device is adjusted by a manipulator, and then the laser welding angle of the laser welding device is adjusted, that is, the entire laser composite welding system is driven by the manipulator to rotate 10°; then the adjustment device is used to adjust the light wire centering, light wire spacing and relative height to adapt to the welding position of the laser welding device; the rotating device drives the arc welding gun to rotate the remaining 35° to meet the angle required for arc welding, and then the welding process is carried out. After completing the welding of the first weld, the entire laser hybrid welding system is driven by the manipulator to the next symmetrical weld structure. If the laser welding posture and arc welding posture need to be adjusted, the manipulator and the rotating device are used to coordinate the action to adjust the welding angle of the laser beam and the arc welding gun before welding; while maintaining the same welding direction as the first weld, switch to the welding posture of the second symmetrical weld, such as Fig. 9 The step-by-step conversion process in AD shown in the figure completes the welding of another symmetrical weld. Similarly, when welding workpieces in batches, the position and angle of the laser beam and arc welding gun can be automatically adjusted without manual adjustment, which has high work efficiency and can maintain the welding quality of the symmetrical weld.

[0049] Among them, the arc welding gun of the arc welding device is in the process of rotation, such as Figure 8As shown, the line connecting the laser beam action point and the end of the arc welding wire is the rotation axis L, the end of the arc welding wire of the arc welding device 10 is the center of the circle, the vertical plane P to the rotation axis L is the rotation plane, the distance from the connection point A of the arc welding device 2 and the connecting member 32 to the rotation axis L is the rotation radius, and the arc rack and the arc slide rail are determined by the arc determined by the rotation radius. The rotation plane of the arc welding gun of the arc welding device 2 is located in the vertical plane P of the rotation axis L; the rotation of the arc welding gun is controlled by the rotating mechanism, and the end position of the arc welding wire is always located on the rotation axis L and remains stationary, that is, the relative position of the laser beam action point and the arc welding wire does not change with the rotation of the arc welding gun. This arrangement can ensure that the rotation center and rotation radius of the arc welding gun remain unchanged, that is, the distance between the light wires remains unchanged, that is, the welding conditions of the symmetrical welds on both sides remain consistent, and the quality of the welds is guaranteed.

[0050] The basic principle and main features of the utility model are shown and described above. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments. Therefore, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the appended claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A welding gun rotating mechanism for a complex welding structure, characterized in that: The invention comprises a mounting seat (1), a drive motor (2), a transmission assembly (3) and a guide assembly (4); the drive motor (2) is fixedly arranged on an arc welding gun of an arc welding device (10); the drive motor (2) drives the arc welding gun to rotate relative to the mounting seat through the transmission assembly (3); and the guide assembly (4) is arranged between the arc welding device (10) and the transmission assembly (3) and is used for rotational guidance of the arc welding device (10).

2. A welding gun rotating mechanism for a complex welding structure according to claim 1, characterized in that: The transmission assembly (3) comprises a transmission gear (31) and an arc-shaped rack (32); the transmission gear (31) is fixedly arranged at the output end of the driving motor (2) and driven to rotate by the driving motor (2); the arc-shaped rack (32) is fixedly arranged on a mounting seat; the transmission gear (31) meshes with the arc-shaped rack (32).

3. The welding gun rotating mechanism for a complex welding structure according to claim 1, characterized in that: The guide assembly (4) comprises an arc-shaped slide rail (41) and a slider (42); the arc-shaped slide rail (41) is fixedly arranged on the mounting seat (1); the slider (42) is arranged at the bottom end of the driving motor (2); and the slider (42) is slidably connected to the arc-shaped slide rail (41).

4. A welding gun rotating mechanism for a complex welding structure according to claim 3, characterized in that: The driving motor (2) is fixedly sleeved on the arc welding gun via a connecting piece (5), the sliding block (42) is fixedly arranged on the connecting piece (5), and the sliding block (42) is adapted to the arc-shaped sliding rail (41).

5. The welding gun rotating mechanism for a complex welding structure according to claim 1, characterized in that: The invention also includes an adjustment component (6) arranged on the mounting seat (1), wherein the adjustment component (6) includes a first drive unit (61), a second drive unit (62) and a third drive unit (63), which are respectively used to drive the arc welding device (10) to move in the x-axis, y-axis and z-axis directions, and the first drive unit (61), the second drive unit (62) and the third drive unit (63) have the same composition structure.

6. The welding gun rotating mechanism for a complex welding structure according to claim 5, characterized in that: The first driving part (61) comprises a first motor (611), a first lead screw (612) and a first nut (613); the first motor (611) is arranged on the mounting seat (1); the first lead screw (612) is driven to rotate by the first motor (611); the first nut (613) is sleeved on the first lead screw (612) and is slidably connected; the second driving part (62) is arranged on the first nut (613) of the first driving part (61); and the third driving part (63) is arranged on the second nut of the second driving part (62).

7. The welding gun rotating mechanism for a complex welding structure according to claim 1, characterized in that: The rotation angle range of the arc welding gun of the arc welding device (10) is -70° to 70°.

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