A welding tool for long welded pipe of vehicle frame

Abstract

The utility model relates to a kind of welding tool for frame long welded pipe, it includes bottom plate, fixed platform, double-end clamping mechanism, support mechanism, fixed mechanism and welding mechanism, fixed platform is located on bottom plate.Double-end clamping mechanism is driven screw rod one rotation by motor one, drive nut sleeve one reverse movement, and then make moving platform and clamping plate close or far away, realize welded pipe end positioning butt joint, support mechanism is support roller group, be located in fixed platform and moving platform, part support mechanism contains wheel frame and gyro wheel, fixed mechanism is pushed by cylinder push plate, let support mechanism compress tightly welded pipe, its transmission assembly can drive gyro wheel rotation, drive welded pipe synchronous rotation, welding mechanism is driven screw rod two by motor three, make nut sleeve two drive welding torch to move to butt joint, clamping plate can also be equipped with bearing seat and rotating plate, the mechanism is replaced by motor drive to reduce cost and time Artificial adjustment, adapt to the length difference of welded pipe, improve welding flexibility and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of welded pipe processing, and in particular to a welding fixture for long welded pipes for vehicle frames. Background Technology

[0002] In the automotive manufacturing industry, long welded pipes are core components of key load-bearing parts such as frames and chassis. Their welding quality directly determines the structural strength, safety, and service life of automobiles. However, in the current welding process of long welded pipes in automobiles, traditional support and fixing methods still have many technical bottlenecks, making it difficult to meet the high-quality requirements of industrial production.

[0003] Traditional welding methods have low automation levels, which restricts welding efficiency and quality stability. In existing technologies, after the welded pipes are joined, the welding operation needs to be completed manually by holding a welding torch or by using a fixed welding torch in conjunction with the rotation of the welded pipe. It is difficult to ensure the relative position stability between the welding torch and the welded pipe joint surface when the welding torch is held manually, which easily leads to defects such as weld bead misalignment and uneven penetration depth, resulting in a low welding qualification rate. Furthermore, traditional support devices lack a drive mechanism to drive the welded pipe to rotate synchronously. When a single-end drive method is used, relative sliding is easily caused by insufficient friction between the two welded pipes, resulting in asynchronous rotation of the welded pipes, which in turn causes problems such as poor weld bead continuity and undercut. In addition, for welded pipes with a length exceeding 5m, traditional support devices cannot dynamically adjust the support points according to the welding position. The welded pipe is prone to deflection and deformation during rotation, which further aggravates the fluctuation of welding quality. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a welding fixture for long welded pipes in vehicle frames.

[0005] The welding fixture for long welded pipes in vehicle frames provided by this utility model adopts the following technical solution:

[0006] A welding fixture for long welded pipes in vehicle frames includes a base plate, a fixed platform, a double-end clamping mechanism, a support mechanism, a fixing mechanism, and a welding mechanism. The fixed platform is disposed on the base plate. The double-end clamping mechanism includes a motor, a fixed block, a lead screw, a slide rod, a nut sleeve, a slider, a connecting plate, a moving platform, and a clamping plate. Fixed blocks are disposed at both ends of the base plate. The motor is disposed on one of the fixed blocks. The output end of the motor is connected to the lead screw, and the other end of the lead screw is rotatably connected to the fixed block on the other side. Both ends of the slide rod are fixed to the fixed blocks. The platform has two threaded nut sleeves, which are respectively located on both sides of the fixed platform. When the lead screw rotates, the two nut sleeves move in opposite directions. The connecting plate is fixed on the nut sleeves, and the slider is located at the bottom of the connecting plate. The slider slides in cooperation with the slide rod. The moving platform is fixed on the connecting plate, and the clamping plate is located on the moving platform. The support mechanism is specifically a set of support rollers, which are respectively located on the fixed platform and the moving platform. The fixing mechanism is located on the fixed platform for limiting the welding pipe.

[0007] Optionally, the support mechanism includes a wheel frame and rollers, the rollers are rotatably connected to the wheel frame, two sets of wheel frames are spaced apart on the fixed platform, and a set of wheel frames and rollers are respectively provided on the two sets of movable platforms, with two sets of rollers on the wheel frame.

[0008] Optionally, the fixing mechanism includes a fixing frame, a cylinder, and a push plate. The fixing frame is mounted on the fixing platform, the cylinder is mounted on the fixing frame, the output end of the cylinder is connected to the push plate, and at least four sets of support mechanisms are connected to the bottom of the push plate.

[0009] Optionally, the fixing mechanism is further provided with a transmission assembly, which includes a second motor, a fixed plate, a driving wheel, a driven wheel, a belt, and a rotating shaft. The fixed plate is disposed on one side of the push plate, the second motor is disposed on the fixed plate, the output end of the second motor is connected to the driving wheel, the driven wheel is fixed on the rotating shaft, the belt is tensioned between the driving wheel and the driven wheel, and the rotating shaft passes through a wheel frame and a roller on one side of the bottom support mechanism of the push plate, and the roller is fixed on the rotating shaft.

[0010] Optionally, the welding mechanism includes a third motor, a frame, a second lead screw, a second nut sleeve, a slide rail, a support frame, and a welding torch. The frame is disposed on the side wall of the fixed platform, the third motor is disposed on the frame, one end of the second lead screw is rotatably connected to the frame, the output end of the third motor is connected to the other end of the second lead screw, the second nut sleeve is threadedly connected to the second lead screw, the nut sleeve is slidably engaged with the slide rail, the support frame is fixed to the top of the nut sleeve, and the welding torch is disposed on the support frame.

[0011] Optionally, the clamping plate is provided with a bearing seat and a rotating plate, and the rotating plate is rotatably connected to the clamping plate through the bearing seat.

[0012] In summary, this utility model has at least one of the following beneficial technical effects:

[0013] 1. The motor drives the lead screw between the two fixed blocks to rotate. The lead screw adopts a bidirectional thread design with opposite threads at both ends. The two nuts fitted on it move synchronously in the opposite direction as the lead screw rotates. The connecting plate rigidly connects the nuts to the moving platform, which ultimately drives the two moving platforms and the clamping plate on the platform to move closer or further away synchronously. The two pipes to be welded are placed on the support mechanism on the two moving platforms and the fixed platform respectively. The clamping plate positions the end of the pipe by adhering to the side wall of the end of the pipe. When the two moving platforms move closer synchronously, the ends of the two pipes can be tightly connected. The motor drive replaces manual adjustment, which greatly reduces labor costs and operation time.

[0014] 2. When the two welded pipes come into contact under the action of the clamping plate, the cylinder output shaft pushes the push plate downward, driving the four sets of support mechanisms at the bottom to press down synchronously until the top roller is tightly attached to the outer wall of the welded pipe. By adjusting the cylinder, the clamping force of the top roller on the welded pipe can be controlled, ensuring sufficient friction to drive the welded pipe to rotate. At this time, the double-end clamping mechanism restricts the axial movement of the welded pipe, and the fixing mechanism restricts the radial movement of the welded pipe. The second motor is started, and the driving wheel drives the two sets of driven wheels to rotate synchronously through the belt, thereby driving the rotating shaft and roller to rotate. The roller drives the two welded pipes to rotate synchronously through friction, thus cooperating with the welding mechanism to complete the welding of the welded pipes.

[0015] 3. Sometimes the lengths of the two welded pipes are not the same. When the double-end clamping mechanism clamps the welded pipes of different lengths axially, the position of the joint of the two welded pipes on the fixed platform will be different. At this time, the motor drives the lead screw to rotate, and the nut sleeve moves horizontally, which in turn moves the welding gun on the support frame to the joint of the welded pipes, greatly improving the flexibility of actual use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a welding fixture used for long welded pipes on a vehicle frame.

[0017] Figure 2 This is a schematic diagram of the other side of a welding fixture used for long welded pipes on a vehicle frame.

[0018] Figure 3 yes Figure 1 Enlarged view of part A in the middle.

[0019] Figure 4 This is a schematic diagram showing the positional relationship between the fixed platform, the fixed mechanism, and the welding machine mechanism.

[0020] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Fixed platform; 3. Double-end clamping mechanism; 31. Motor 1; 32. Fixed block; 33. Lead screw 1; 34. Slide rod; 35. Nut sleeve 1; 36. Slider; 37. Connecting plate; 38. Moving platform; 39. Clamping plate; 4. Support mechanism; 41. Wheel frame; 42. Roller; 5. Fixing mechanism; 51. Fixed frame; 52. Cylinder; 53. Push plate; 54. Transmission assembly; 541. Motor 2; 542. Fixed plate; 543. Drive wheel; 544. Driven wheel; 545. Belt; 546. Rotating shaft; 6. Welding mechanism; 61. Motor 3; 62. Frame; 63. Lead screw 2; 64. Nut sleeve 2; 65. Slide rail; 66. Support frame; 67. Welding torch. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] This utility model discloses a welding fixture for long welded pipes in vehicle frames. (Refer to...) Figure 1-4A welding fixture for long welded pipes in a vehicle frame includes a base plate 1, a fixed platform 2, a double-end clamping mechanism 3, a support mechanism 4, a fixing mechanism 5, and a welding mechanism 6. The fixed platform 2 is mounted on the base plate 1. The double-end clamping mechanism 3 includes a motor 31, a fixing block 32, a lead screw 33, a slide bar 34, a nut sleeve 35, a slider 36, a connecting plate 37, a moving platform 38, and a clamping plate 39. Fixing blocks 32 are provided at both ends of the base plate 1, and the motor 31 is mounted on one of the fixing blocks 32. The output end is connected to lead screw 33, and the other end of lead screw 33 is rotatably connected to fixed block 32 on the other side. Both ends of slide rod 34 are fixed to fixed block 32. Two threaded nut sleeves 35 are provided on lead screw 33. The two nut sleeves 35 are respectively located on both sides of fixed platform 2. When lead screw 33 rotates, the two nut sleeves 35 move in opposite directions. Connecting plate 37 is fixed on nut sleeves 35. Slider 36 is located at the bottom of connecting plate 37. Slider 36 slides with slide rod 34, and the moving platform... 38 is fixed on the connecting plate 37, and the clamping plate 39 is set on the moving platform 38. The support mechanism 4 is specifically a set of 42 support rollers, which are respectively set on the fixed platform 2 and the moving platform 38. The fixing mechanism 5 is set on the fixed platform 2 for limiting the welding pipe. With this design, the motor 31 drives the lead screw 33 between the two fixed blocks 32 to rotate. The lead screw 33 adopts a bidirectional thread design with opposite threads at both ends. The two nut sleeves 35 on it move synchronously in the opposite direction with the rotation of the lead screw. The connecting plate 37 rigidly connects the nut sleeves 35 to the moving platform 38, which ultimately drives the two moving platforms 38 and the clamping plate 39 on the platform to move closer or further away synchronously. The two welding pipes to be welded are placed on the two moving platforms 38 and the support mechanism 4 on the fixed platform 2, respectively. The clamping plate 39 achieves end positioning of the welding pipe by adhering to the side wall of the welding pipe end. When the two moving platforms 38 move closer synchronously, the ends of the two welding pipes can be tightly connected. The motor drive replaces manual adjustment, which greatly reduces labor costs and operation time.

[0025] Support mechanism 4 includes wheel frame 41 and rollers 42. Rollers 42 are rotatably connected to wheel frame 41. Two sets of wheel frames 41 are spaced apart on fixed platform 2. Two sets of wheel frames 41 and rollers 42 are respectively provided on two sets of movable platforms 38. Two sets of rollers 42 are provided on wheel frame 41. Fixed mechanism 5 includes fixed frame 51, cylinder 52, and push plate 53. Fixed frame 51 is provided on fixed platform 2. Cylinder 52 is provided on fixed frame 51. The output end of cylinder 52 is connected to push plate 53. At least four sets of support mechanisms 4 are connected to the bottom of push plate 53. Fixed mechanism 5 is also provided with transmission assembly 54. Transmission assembly 54 includes motor 541, fixed plate 542, driving wheel 543, driven wheel 544, belt 545, and rotating shaft 546. Fixed plate 542 is provided on one side of push plate 53. Motor 541 is provided on... On the fixed plate 542, the output end of the motor 541 is connected to the drive wheel 543, and the driven wheel 544 is fixed on the rotating shaft 546. The belt 545 is tensioned between the drive wheel 543 and the driven wheel 544. The rotating shaft 546 passes through the wheel frame 41 and roller 42 on one side of the bottom support mechanism 4 of the push plate 53. The roller 42 is fixed on the rotating shaft 546. With this design, when the two welded pipes abut against each other under the action of the clamping plate 39, the output axis of the cylinder 52 pushes the push plate 53 downward, driving the four sets of bottom support mechanisms 4 to press down synchronously until the top roller 42 is tightly attached to the outer wall of the welded pipe. By adjusting the cylinder 52, the pressing force of the top roller 42 on the welded pipe can be controlled, ensuring sufficient friction to drive the welded pipe to rotate. At this time, the double-end clamping mechanism 3 restricts the axial movement of the welded pipe, and the fixing mechanism 5 restricts the radial movement of the welded pipe.

[0026] When the motor 541 is started, the drive wheel 543 drives the two driven wheels 544 to rotate synchronously via the belt 545, which in turn drives the rotating shaft 546 and the roller 42 to rotate. The roller 42 drives the two welded pipes to rotate synchronously through friction, thereby cooperating with the welding mechanism 6 to complete the welding of the welded pipes.

[0027] The clamping plate 39 is provided with a bearing seat and a rotating plate. The rotating plate is rotatably connected to the clamping plate 39 through the bearing seat, so that the ends of the two welded pipes receive the axial clamping force of the rotating plate, but at the same time, it does not affect the rotation of the two welded pipes.

[0028] It should be noted that the roller 42 set on the rotating shaft 546 can be made of a different material than other rollers 42, such as a roller 42 made of a material with a higher coefficient of friction, such as a rubber wheel.

[0029] The welding mechanism 6 includes a motor 61, a frame 62, a lead screw 63, a nut sleeve 64, a slide rail 65, a support frame 66, and a welding torch 67. The frame 62 is mounted on the side wall of the fixed platform 2. The motor 61 is mounted on the frame 62. One end of the lead screw 63 is rotatably connected to the frame 62, and the output end of the motor 61 is connected to the other end of the lead screw 63. The nut sleeve 64 is threaded onto the lead screw 63. The nut sleeve slides with the slide rail 65. The support frame 66 is fixed to the top of the nut sleeve, and the welding torch 67 is mounted on the support frame 66. The advantage of this design is that the lengths of the two welding pipes are sometimes different. When the double-end clamping mechanism 3 clamps the welding pipes of different lengths axially, the joint of the two welding pipes will be in different positions on the fixed platform 2. At this time, the motor 61 drives the lead screw 63 to rotate, and the nut sleeve 64 moves horizontally accordingly, which in turn moves the welding torch 67 on the support frame 66 to the joint of the welding pipes, greatly improving the flexibility of actual use.

[0030] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A welding fixture for long welded pipes in vehicle frames, characterized in that: The system includes a base plate (1), a fixed platform (2), a double-end clamping mechanism (3), a support mechanism (4), a fixing mechanism (5), and a welding mechanism (6). The fixed platform (2) is mounted on the base plate (1). The double-end clamping mechanism (3) includes a motor (31), a fixed block (32), a lead screw (33), a slide rod (34), a nut sleeve (35), a slider (36), a connecting plate (37), a moving platform (38), and a clamping plate (39). Fixed blocks (32) are mounted at both ends of the base plate (1). The motor (31) is mounted on one of the fixed blocks (32). The output end of the motor (31) is connected to the lead screw (33). The other end of the lead screw (33) is rotatably connected to the fixed block (32) on the other side. The two ends of the slide rod (34) are fixed to the fixed block (32). Two threaded nut sleeves (35) are provided on the first (33), and the two nut sleeves (35) are respectively provided on both sides of the fixed platform (2). When the screw (33) rotates, the two nut sleeves (35) move in opposite directions. The connecting plate (37) is fixed on the nut sleeves (35). The slider (36) is provided at the bottom of the connecting plate (37). The slider (36) slides with the slide rod (34). The moving platform (38) is fixed on the connecting plate (37). The clamping plate (39) is provided on the moving platform (38). The support mechanism (4) is specifically a set of support rollers (42). The set of support rollers (42) is respectively provided on the fixed platform (2) and the moving platform (38). The fixing mechanism (5) is provided on the fixed platform (2) for limiting the welding pipe.

2. The welding fixture for long welded pipes in a vehicle frame according to claim 1, characterized in that: The support mechanism (4) includes a wheel frame (41) and rollers (42). The rollers (42) are rotatably connected to the wheel frame (41). Two sets of wheel frames (41) are spaced apart on the fixed platform (2). A set of wheel frames (41) and rollers (42) are respectively provided on the two sets of moving platforms (38). Two sets of rollers (42) are provided on the wheel frame (41).

3. The welding fixture for a long welded pipe in a vehicle frame according to claim 2, characterized in that: The fixing mechanism (5) includes a fixing frame (51), a cylinder (52), and a push plate (53). The fixing frame (51) is mounted on the fixing platform (2), and the cylinder (52) is mounted on the fixing frame (51). The output end of the cylinder (52) is connected to the push plate (53), and at least four sets of support mechanisms (4) are connected to the bottom of the push plate (53).

4. The welding fixture for a long welded pipe in a vehicle frame according to claim 3, characterized in that: The fixing mechanism (5) is also provided with a transmission assembly (54). The transmission assembly (54) includes a second motor (541), a fixing plate (542), a driving wheel (543), a driven wheel (544), a belt (545), and a rotating shaft (546). The fixing plate (542) is located on one side of the push plate (53). The second motor (541) is located on the fixing plate (542). The output end of the second motor (541) is connected to the driving wheel (543). The driven wheel (544) is fixed on the rotating shaft (546). The belt (545) is tensioned between the driving wheel (543) and the driven wheel (544). The rotating shaft (546) passes through the wheel frame (41) and roller (42) on one side of the bottom support mechanism (4) of the push plate (53). The roller (42) is fixed on the rotating shaft (546).

5. The welding fixture for long welded pipes in a vehicle frame according to claim 1, characterized in that: The welding mechanism (6) includes a motor (61), a frame (62), a lead screw (63), a nut sleeve (64), a slide rail (65), a support frame (66), and a welding torch (67). The frame (62) is located on the side wall of the fixed platform (2). The motor (61) is located on the frame (62). One end of the lead screw (63) is rotatably connected to the frame (62). The output end of the motor (61) is connected to the other end of the lead screw (63). The nut sleeve (64) is threaded onto the lead screw (63). The nut sleeve is slidably engaged with the slide rail (65). The support frame (66) is fixed to the top of the nut sleeve. The welding torch (67) is located on the support frame (66).

6. The welding fixture for a long welded pipe in a vehicle frame according to claim 1, characterized in that: The clamping plate (39) is provided with a bearing seat and a rotating plate, and the rotating plate is rotatably connected to the clamping plate (39) through the bearing seat.

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