Spin welding positioning clamp

Abstract

The invention provides a rotary welding positioning fixture, which belongs to the technical field of welding, and comprises support frames, a base, a speed reducer and a servo motor, and further comprises a rotating assembly capable of rotating 360 degrees in the axial direction and the radial direction of a workpiece, the left side and the right side of the rotating assembly are respectively and symmetrically provided with one support frame, and the support frames are fixedly connected to the base; the speed reduction device is movably connected to the supporting frame and fixedly connected with the servo motor, the rotating assembly comprises an axial rotating device capable of rotating by 360 degrees along a workpiece and a radial rotating device capable of rotating by 360 degrees in the radial direction of the workpiece, and the radial rotating device is perpendicularly arranged in the center of the interior of the axial rotating device. The radial rotating device comprises a speed reducing device, a rotating clamp and a servo motor, the rotating clamp is arranged on the speed reducing device, the workpiece is rotated by 360 degrees up and down and left and right through the axial rotating device and the radial rotating device, the optimal welding position can be provided, the welding precision is guaranteed, and therefore the consistency and stability of the welding quality are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to a rotary welding positioning fixture. Background Art

[0002] At present, robots are an important member of the field of modern industrial automation and are increasingly widely used. Welding robots can achieve micron-level positioning accuracy through precise control systems and advanced sensing technology to ensure that every welding can meet extremely high quality standards. This not only reduces welding defects such as pores and cracks, but also improves the overall strength and aesthetics of the product. Compared with manual welding, welding robots can work continuously and uninterruptedly without being affected by factors such as fatigue and emotional fluctuations. By programming to optimize welding paths and parameters, robots can complete complex welding tasks in the shortest time and shorten production cycles. In the face of safety hazards such as high temperature, spatter, smoke and harmful gas emissions during welding, the use of welding robots releases operators from dangerous environments and reduces the risk of work-related accidents. The consistency and high quality of robot welding reduces scrap and rework rates, further saving costs.

[0003] The disadvantage of welding robots is that the height, angle and position of the welding workpieces can be adjusted freely during welding, which makes it difficult to ensure the best welding position, and easily leads to quality problems such as uneven welding and welding deformation. Especially for some large workpieces, the workpieces are large and not easy to flip, and it is difficult to adjust the angle, especially for some large special-shaped workpieces such as spherical or arc-shaped workpieces. Since the arc surface usually has a certain curvature and curvature, the welding space is relatively small, and it is more difficult to weld inside the workpiece. Considering the possible impact on the material during welding, such as deformation and discoloration, and to ensure the quality of the weld and avoid the appearance of ripples, intermittent, pores, cracks and other undesirable phenomena in the weld caused by the continuous rotation of the welding head, it is very important to maintain a stable welding speed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a rotary welding positioning fixture, which can rotate the workpiece 360° up and down, left and right, and front and back through axial and radial rotation devices. For large workpieces, especially large workpieces such as arc plates or spherical workpieces, it can provide accurate and reliable positioning, and for internal welding of large workpieces, it can also provide an optimal welding position, thereby ensuring welding accuracy and freeing manual labor from a dangerous and narrow working environment, thereby ensuring the consistency and stability of welding quality.

[0005] The technical solution adopted by the present invention is a rotary welding positioning fixture including a support frame, a base, a reduction device, a servo motor, and a rotating assembly that can rotate 360° along the axial and radial directions of the workpiece. A support frame is symmetrically arranged on the left and right sides of the rotating assembly, the support frame is fixedly connected to the base, the reduction device is movably connected to the support frame, the reduction device is fixedly connected to the servo motor, and the servo motor is used to control the rotation angle and rotation speed of the rotating assembly, so as to cooperate with the optimal welding angle and position of the robot, and the welding accuracy can reach the micron level, thereby ensuring the stability and consistency of the welding accuracy; the rotating assembly includes a An axial rotating device for rotating the workpiece 360° and a radial rotating device for rotating the workpiece radially 360°, a radial rotating device is vertically arranged at the center position inside the axial rotating device, the axial rotating device includes a frame body and a rotating connecting plate, a rotating connecting plate is fixedly arranged on each of the left and right sides of the frame body, the radial rotating device is arranged in a cavity position at the center of the frame body, the radial rotating device includes a reduction device, a rotating fixture and a servo motor, the rotating fixture is arranged on the reduction device, and the rotating fixture is driven to rotate by the reduction device, the reduction device is fixedly arranged on the frame body, and the reduction device is connected to the output end of the servo motor.

[0006] Specifically, the rotating fixture includes a top plate and a bottom plate that are arranged in parallel and connected to each other, and arc rib plates for fixing the arc-shaped workpiece are arranged between the top plate and the bottom plate, and the specific number of the arc rib plates can be determined according to the size of the workpiece. One end of the arc rib plate is arranged on the top plate, and the other end is arranged on the bottom plate. The position between two adjacent arc rib plates constitutes the position for the arc workpiece to be welded.

[0007] Specifically, the arc-shaped rib plate includes an arc plate, a bottom plate, and side reinforcement ribs. A bottom plate is provided at each end of the arc plate, and side reinforcement ribs are provided along the length direction of the arc plate to enhance the load-bearing capacity of the arc plate. A circular hole is provided on the bottom plate, and U-shaped holes are also provided at corresponding positions of the top plate and the bottom plate for fixing the bottom plate.

[0008] Specifically, the frame body is a rectangular frame structure formed by two parallel horizontal long boards and two vertical short boards vertically arranged at the left and right ends of the long boards, which are connected to each other. Four horizontal ribs are evenly spaced laterally inside the frame body, and two longitudinal ribs are evenly spaced longitudinally. The longitudinal ribs and the horizontal ribs are connected to each other to form a cavity with a mouth in the middle, and multiple reinforcing ribs are evenly arranged on the sides of the long boards and the short boards along the length direction.

[0009] Specifically, the rotating connecting plate is a rectangular frame composed of two parallel vertical plates and two horizontal horizontal plates vertically arranged at both ends of the vertical plates, and a bearing seat is arranged at the center position of the top of the rotating connecting plate.

[0010] Specifically, the support frame is a rectangular frame structure composed of two parallel vertical plates and two horizontal horizontal plates vertically arranged at both ends of the vertical plates, and three bearing seats are arranged on the top of the support frame in sequence from left to right.

[0011] Specifically, the reduction device is a two-stage reduction device, including a first-stage reduction driving gear, a first-stage reduction passive gear, a second-stage reduction driving gear, a second-stage reduction passive gear, a first-stage rotating shaft, a second-stage rotating shaft, and a third-stage rotating shaft. One end of the first-stage rotating shaft is arranged on the right vertical plate of the support frame, and the other end is connected to the first-stage reduction driving gear. One end of the second-stage rotating shaft is arranged on the right vertical plate of the support frame, and the other end penetrates and connects the first-stage reduction passive gear, the left vertical plate of the support frame, and the second-stage reduction driving gear from right to left in sequence. One end of the third-stage rotating shaft is arranged on the bearing seat of the rotating connecting plate, the middle is penetrated and connected to the second-stage reduction passive gear, and the other end is arranged on the top bearing seat of the support frame. The first-stage reduction driving gear and the first-stage reduction passive gear are meshed for transmission, which is used to drive the second-stage reduction driving gear and the second-stage reduction passive gear to mesh and transmit, thereby reducing the speed of the servo motor.

[0012] Specifically, the reduction device includes a driving pinion and a driven large gear, and the driving pinion and the driven large gear are meshed and driven to reduce the rotation speed of the servo motor.

[0013] The beneficial effects of the present invention are: 1. The workpiece is rotated 360° up and down, left and right, front and back through the axial and radial rotation devices. For large special-shaped workpieces, especially large workpieces such as arc plates or spherical workpieces, the workpieces have arcs and curvatures, which require high welding technology and welding quality. During the welding process, the welding angle needs to be continuously adjusted, and the height of the welded parts needs to be adjusted to adapt to the position of the robot welding gun. The servo motor is used to rotate the axial rotation device and the radial rotation device 360° up and down, left and right, front and back. When welding inside the workpiece, the bottom of the workpiece can also be turned over with the bottom facing up, meeting the welding position and accuracy requirements of the robot welding gun for the workpiece, thereby ensuring the consistency and stability of the welding quality.

[0014] 2. When it is necessary to weld ordinary large workpieces, not curved plates or spherical workpieces, place the workpiece on the radial rotating device, and use the servo motor to rotate the axial rotating device and the radial rotating device 360° up, down, front, back, left and right to adapt to the welding position of the robot welding gun. It can cooperate with the robot welding gun to the welding accuracy and position requirements of the workpiece with a great degree of freedom. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of embodiment 3 of the present invention.

[0016] Markings in the figure: 1. Rotating assembly; 101. Axial rotating device; 102. Radial rotating device; 1011. Frame body; 1012. Rotating connecting plate; 1013. Long board; 1014. Short board; 1015. Horizontal rib plate; 1016. Longitudinal rib plate; 1017. Reinforcement rib; 2. Support frame; 201. Vertical board; 202. Horizontal board; 3. Base; 4. Speed ​​reducer 4; 5. Servo motor; 6. Secondary shaft; 7. Bearing seat; 8. Air cavity; 9, rotating fixture; 901, top plate; 902, bottom plate; 903, arc rib plate; 10, speed reducer; 1001, driving pinion; 1002, passive large gear; 11, bearing seat; 12, first-stage speed reduction driving gear; 13, first-stage speed reduction passive gear; 14, second-stage speed reduction driving gear; 15, second-stage speed reduction passive gear; 16, first-stage rotating shaft; 17, third-stage rotating shaft; 18, arc plate; 19, bottom plate; 20, side reinforcement ribs. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1: Figure 1-2As shown, a rotary welding positioning fixture includes a support frame 2, a base 3, a reduction device 4, a servo motor 5, and also includes a rotating component 1 that can rotate 360° along the axial and radial directions of the workpiece. A support frame 2 is symmetrically arranged on the left and right sides of the rotating component 1. The support frame 2 is fixedly connected to the base 3, and the reduction device 4 is movably connected to the support frame 2. The reduction device 4 is fixedly connected to the servo motor 5. The rotating component 1 includes an axial rotating device 101 for rotating the workpiece 360° and a radial rotating device 102 for rotating the workpiece 360° radially. The center position of the axial rotating device 101 is vertical. A radial rotating device 102 is directly provided, and the axial rotating device 101 includes a frame body 1011 and a rotating connecting plate 1012. A rotating connecting plate 1012 is fixedly provided on the left and right sides of the frame body 1011. The radial rotating device 102 is arranged in the cavity 8 at the center of the frame body 1011. The radial rotating device includes a reduction device 10, a rotating clamp 9 and a servo motor. The rotating clamp 9 is arranged on the reduction device 10, and the rotating clamp 9 is driven to rotate by the reduction device 10. The reduction device is fixedly provided on the frame body 1011, and the reduction device 10 is connected to the output end of the servo motor.

[0019] Preferably, the rotating fixture 9 includes a top plate 901 and a bottom plate 902 which are arranged in parallel and interconnected. An arc rib plate 903 for fixing the arc-shaped workpiece and the specific number of which can be determined according to the size of the workpiece is arranged between the top plate 901 and the bottom plate 902. One end of the arc rib plate 903 is arranged on the top plate 901, and the other end is arranged on the bottom plate 902. The position between two adjacent arc rib plates 903 constitutes the position for the arc-shaped workpiece to be welded.

[0020] Preferably, the arc rib plate 903 includes an arc plate 18, a bottom plate 19, and side reinforcing ribs 20. A bottom plate 19 is provided at each end of the arc plate 18, and side reinforcing ribs 20 are provided along the length direction of the arc plate 18 to strengthen the load-bearing capacity of the arc plate 18. A circular hole is provided on the bottom plate 19, and U-shaped holes are also provided at corresponding positions of the top plate 901 and the bottom plate 902 for fixing the bottom plate 19. The bottom plate can be fixed to the bottom plate and the top plate by bolts, and the bottom plate 19 of the arc rib plate 903 can be adjusted to float and position through the U-shaped holes on the top plate and the bottom plate, and the spacing position between adjacent arc rib plates can be adjusted according to the size of the arc workpiece to be welded.

[0021] Preferably, the frame body 1011 is a rectangular frame structure formed by two parallel horizontal long plates 1013 and two vertical short plates 1014 vertically arranged at the left and right ends of the long plates 1013, which are connected to each other. Four transverse ribs 1015 are evenly spaced laterally inside the frame body 1011, and two longitudinal ribs 1016 are evenly spaced longitudinally. The longitudinal ribs 1016 and the transverse ribs 1015 are connected to each other to form a cavity 8 with a mouth in the middle, and a plurality of reinforcing ribs 1017 are evenly arranged on the sides of the long plates 1013 and the short plates 1011 along the length direction.

[0022] Preferably, the rotating connecting plate 1012 is a rectangular frame composed of two parallel vertical plates and two horizontal cross plates vertically arranged at both ends of the vertical plates, and a bearing seat 7 is arranged at the top center position of the rotating connecting plate 1012.

[0023] Preferably, the support frame 2 is a rectangular frame structure composed of two parallel vertical plates 201 and two horizontal horizontal plates 202 vertically arranged at both ends of the vertical plates 201, and three bearing seats 11 are arranged on the top of the support frame 2 in sequence from left to right.

[0024] Preferably, the reduction device 4 is a two-stage reduction device, including a first-stage reduction driving gear 12, a first-stage reduction passive gear 13, a second-stage reduction driving gear 14, a second-stage reduction passive gear 15, a first-stage rotating shaft 16, a second-stage rotating shaft 6, and a third-stage rotating shaft 17. One end of the first-stage rotating shaft 16 is arranged on the right side vertical plate 201 of the support frame 2, and the other end is connected to the first-stage reduction driving gear 12. One end of the second-stage rotating shaft 6 is arranged on the right side vertical plate 201 of the support frame, and the other end penetrates and connects the first-stage reduction passive gear, the left side vertical plate 201 of the support frame, and the second-stage reduction driving gear 14 from right to left in sequence. One end of the third-stage rotating shaft 17 is arranged on the bearing seat 7 of the rotating connecting plate 1012, the middle is penetrated and connected to the second-stage reduction passive gear 15, and the other end is arranged on the top bearing seat 11 of the support frame 2. The first-stage reduction driving gear 12 and the first-stage reduction passive gear 13 are meshed for transmission, which are used to drive the second-stage reduction driving gear 14 and the second-stage reduction passive gear 15 to mesh and transmit, thereby reducing the speed of the servo motor 5.

[0025] Preferably, the reduction gear 10 comprises a driving pinion 1001 and a driven large gear 1002, and the driving pinion 1001 and the driven large gear 1002 are meshed and driven to reduce the rotation speed of the servo motor.

[0026] like Figure 1-2As shown, when it is necessary to weld an arc-shaped plate or a spherical workpiece, the welding workpiece can be placed on the radial rotating device 102 on the frame body 1011, and the fixed position of the bottom plate 19 on the top plate 901 and the bottom plate 902 is determined according to the size of the welding workpiece. If the size of the workpiece is not suitable, the bottom plate 19 can be fixed on the bottom plate 902 and the top plate 901 in the U-shaped hole by bolts to adapt to the appropriate size of the welding workpiece. The robot welding gun welds the welding workpiece. When it is necessary to adjust the left, right, front and back directions of the workpiece, the servo motor is used to adjust the arc workpiece fixed in the radial rotating device in four directions: left, right, front and back. When it is necessary to adjust the height of the workpiece, the servo motor is used to adjust the height of the workpiece. 5. The axial rotating device can rotate 360° in the up, down, front and back directions, thereby ensuring the best welding angle and height of the welding gun, and further ensuring the welding quality and consistency. If it is necessary to weld the inside of a spherical shape, the axial rotating device 101 is controlled by a servo motor to flip the inside of the arc-shaped plate workpiece or the spherical workpiece to an upward position, and then the radial rotating device 102 is rotated to the required angle and position for welding. Since a servo motor is used, it can accurately control the speed and position of the motor, which can ensure that the welding accuracy reaches the micron level, accurately ensure the best welding angle and height of the welding gun, fully meet the best welding angle and height, and achieve consistency and stability of welding quality.

[0027] Embodiment 2: Figure 3 As shown, when it is necessary to weld a workpiece that is not an arc plate or a sphere, the workpiece can be placed on the radial rotating device 102, and the welding workpiece can be fixed and clamped by bolts, and the robot welding gun can weld the workpiece. When it is necessary to adjust the up and down, front and back positions of the workpiece, the servo motor is operated to operate the axial rotating device 4 to adjust the welding workpiece 360° up and down, front and back. When it is necessary to adjust the left and right, front and back positions of the workpiece, the servo motor is operated to operate the radial rotating device 102 to adjust the welding workpiece 360° left and right, front and back, to fully meet the optimal welding angle and position. Without rotating the welding gun, the workpiece is rotated 360° up and down, left and right, front and back. Since the servo motor is used, it can accurately control the speed and position of the motor, accurately ensure the optimal welding angle and height of the welding gun, and thus ensure the welding quality and consistency.

[0028] Embodiment 3: Figure 4 As shown, when the workpiece needs to be welded and there is no need to adjust the left and right position of the workpiece, the workpiece can be fixed to the axial rotating device 4 with bolts to adjust the welding workpiece 360° up and down and front and back to meet the welding position requirements of the workpiece. When the welding gun does not rotate, the position of the workpiece can be adjusted to adapt to the optimal welding angle and position of the welding gun. For some large workpieces that need to be turned over, the workpiece can be turned upward to weld the bottom of the workpiece, thereby saving labor and improving work efficiency.

Claims

1. A rotary welding positioning fixture, comprising a support frame (2), a base (3), a reduction device (4), and a servo motor (5), characterized in that: The invention also comprises a rotating assembly (1) which can rotate 360° in the axial direction and radial direction of the workpiece. A support frame (2) is symmetrically arranged on the left and right sides of the rotating assembly (1). The support frame (2) is fixedly connected to the base (3). A reduction device (4) is movably connected to the support frame (2). The reduction device (4) is fixedly connected to the servo motor (5). The rotating assembly (1) comprises an axial rotating device (101) for rotating the workpiece 360° and a radial rotating device (102) for rotating the workpiece radially 360°. The radial rotating device (102) is vertically arranged at the center of the axial rotating device (101). The axial rotating device (101) is provided with a radial rotating device (102). The device (101) comprises a frame body (1011) and a rotating connecting plate (1012), wherein the rotating connecting plate (1012) is fixedly arranged on the left and right sides of the frame body (1011), the radial rotating device (102) is arranged at the position of the cavity (8) in the center of the frame body (1011), and the radial rotating device comprises a reduction device (10), a rotating fixture (9) and a servo motor, the rotating fixture (9) is arranged on the reduction device (10), and the rotating fixture (9) is driven to rotate by the reduction device (10), the reduction device is fixedly arranged on the frame body (1011), and the reduction device (10) is connected to the output end of the servo motor.

2. A rotary welding positioning fixture according to claim 1, characterized in that: The rotating fixture (9) comprises a top plate (901) and a bottom plate (902) which are arranged in parallel and connected to each other, and arc rib plates (903) for fixing the arc-shaped workpiece are arranged between the top plate (901) and the bottom plate (902), and the specific number of the arc-shaped rib plates (903) can be determined according to the size of the workpiece. One end of the arc-shaped rib plates (903) is arranged on the top plate (901), and the other end is arranged on the bottom plate (902). The position between two adjacent arc-shaped rib plates (903) constitutes the position for the arc-shaped workpiece to be welded.

3. A rotary welding positioning fixture according to claim 2, characterized in that: The arc-shaped rib plate (903) comprises an arc plate (18), a bottom plate (19), and side reinforcing ribs (20). A bottom plate (19) is provided at each end of the arc plate (18). Side reinforcing ribs (20) are provided along the length direction of the arc plate (18) for reinforcing the load-bearing capacity of the arc plate (18). A circular hole is provided on the bottom plate (19), and U-shaped holes are also provided at corresponding positions of the top plate (901) and the bottom plate (902) for fixing the bottom plate (19).

4. A rotary welding positioning fixture according to claim 3, characterized in that: The frame body (1011) is a rectangular frame structure formed by interconnecting two parallel horizontal long plates (1013) and two vertical short plates (1014) vertically arranged at the left and right ends of the long plates (1013). Four transverse rib plates (1015) are evenly arranged in the horizontal direction inside the frame body (1011), and two longitudinal rib plates (1016) are evenly arranged in the longitudinal direction. The longitudinal rib plates (1016) and the transverse rib plates (1015) are interconnected to form a cavity (8) with a mouth in the middle. Multiple reinforcing ribs (1017) are evenly arranged on the sides of the long plates (1013) and the short plates (1011) along the length direction.

5. A rotary welding positioning fixture according to any one of claims 1 to 4, characterized in that: The rotating connecting plate (1012) is a rectangular frame composed of two parallel vertical plates and two horizontal horizontal plates vertically arranged at both ends of the vertical plates, and a bearing seat (7) is arranged at the center position of the top of the rotating connecting plate (1012).

6. A rotary welding positioning fixture according to claim 5, characterized in that: The support frame (2) is a rectangular frame structure composed of two parallel vertical plates (201) and two horizontal horizontal plates (202) vertically arranged at both ends of the vertical plates (201) connected to each other. Three bearing seats (11) are arranged in sequence from left to right on the top of the support frame (2).

7. A rotary welding positioning fixture according to claim 6, characterized in that: The reduction device (4) is a two-stage reduction device, comprising a first-stage reduction driving gear (12), a first-stage reduction driven gear (13), a second-stage reduction driving gear (14), a second-stage reduction driven gear (15), a first-stage rotating shaft (16), a second-stage rotating shaft (6), and a third-stage rotating shaft (17). One end of the first-stage rotating shaft (16) is arranged on the right side vertical plate (201) of the support frame (2), and the other end is connected to the first-stage reduction driving gear (12). One end of the second-stage rotating shaft (6) is arranged on the right side vertical plate (201) of the support frame, and the other end passes through and connects to the first-stage reduction driving gear (12) from right to left. The invention relates to a first-stage reduction driven gear, a left vertical plate (201) of a support frame, a second-stage reduction driving gear (14), one end of a third-stage rotating shaft (17) is arranged on a bearing seat (7) of a rotating connecting plate (1012), the middle of the third-stage rotating shaft (17) is connected to a second-stage reduction driven gear (15), and the other end is arranged on a top bearing seat (11) of the support frame (2), the first-stage reduction driving gear (12) and the first-stage reduction driven gear (13) are meshed for transmission, and are used to drive the second-stage reduction driving gear (14) and the second-stage reduction driven gear (15) to mesh for transmission, thereby reducing the rotation speed of the servo motor (5).

8. A rotary welding positioning fixture according to claim 7, characterized in that: The speed reduction device (10) comprises a driving pinion (1001) and a driven large gear (1002); the driving pinion (1001) and the driven large gear (1002) are meshed and driven to reduce the rotation speed of the servo motor.

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