Assembling and welding device for rectangular narrow and long structural parts

Abstract

The utility model discloses an assembling and welding device for a rectangular narrow and long structural member, belongs to the technical field of assembling and welding devices, and solves the problem of low manual welding efficiency of the existing rectangular narrow and long structural member. The device comprises a workbench, a positioning conveying roller, a pressing gantry assembly, an inner tube assembly and a control assembly. The workpiece bottom plate is placed on the positioning conveying rollers to be positioned, the inner tube assembly is moved to the tail of the workpiece bottom plate, then the workpiece cover plate is placed, and the head pressing gantry and the tail pressing gantry are driven by the control assembly to press the two sides of the workpiece cover plate respectively. And finally, welding of the workpiece bottom plate and the workpiece cover plate is completed through a welding structure in the synchronous moving process of the tail pressing gantry and the inner tube assembly. Compared with manual welding, labor intensity of workers is relieved, and production efficiency and production quality are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of welding devices, specifically to a welding device for rectangular narrow and long structural components. Background Technology

[0002] With the acceleration of urbanization and the continuous advancement of infrastructure construction in my country, the demand for narrow and long structural components with a rectangular quadrilateral shape is constantly increasing. Narrow and long structural components, such as booms or jibs, include a U-shaped workpiece base plate and workpiece cover plate, with openings on both sides of the workpiece base plate and workpiece cover plate welded together to form a box structure with an internal cavity.

[0003] However, the existing welding of narrow and long structural components mainly adopts mechanical tooling for positioning and then manual operation for welding. This not only makes the labor intensity of workers high and the work efficiency low, but also makes the boom prone to deformation or failure to meet the requirements in terms of size and flatness due to factors such as long weld seams, unstable manual operation and uneven heat input of each weld seam. This results in poor product quality and affects the subsequent use of the equipment. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a welding device for rectangular narrow and long structural components, which solves the problem of low efficiency in manual welding of existing rectangular narrow and long structural components.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A rectangular narrow and long structural component welding device is provided, comprising: a worktable; a positioning conveying roller disposed on the worktable for positioning and conveying a workpiece base plate; a clamping gantry assembly, including a head clamping gantry and a tail clamping gantry, both movable along the centerline of the workpiece base plate on the worktable, the head clamping gantry and the tail clamping gantry both used to clamp a workpiece cover plate, and the tail clamping gantry is provided with a welding structure for welding the workpiece cover plate and the workpiece base plate; an inner tube assembly, movably disposed on the workpiece base plate for supporting the weld position between the workpiece base plate and the workpiece cover plate; and a control assembly, which is signal-connected to the positioning conveying roller, the clamping gantry assembly, and the inner tube assembly respectively.

[0007] The working principle of this solution is as follows: the workpiece base plate is positioned on the positioning conveyor roller, and the inner tube assembly is moved to the tail of the workpiece base plate. Then, the workpiece cover plate is placed on top. The control component drives the head pressing gantry and the tail pressing gantry to press the two sides of the workpiece cover plate respectively. Finally, the workpiece base plate and the workpiece cover plate are welded together by a welding structure during the synchronous movement of the tail pressing gantry and the inner tube assembly. Compared with manual welding, this process not only reduces the labor intensity of workers, but also improves production efficiency and production quality.

[0008] Furthermore, the positioning conveying rollers include multiple rollers arranged in a straight line and rotatably mounted on the worktable. All rollers are connected to a drive reduction motor via chain transmission, and at least two first centering clamping mechanisms for positioning the workpiece base plate are provided between the multiple rollers. The chain-driven multi-roller structure ensures smooth conveying of the workpiece base plate; the first centering clamping mechanisms can actively correct workpiece offset and improve positioning repeatability.

[0009] Furthermore, each first centering clamping mechanism includes a base perpendicular to the workpiece base plate. First centering clamping slides are slidably disposed at both ends of the base. The two first centering clamping slides are threadedly connected to both ends of a first lead screw. The first lead screw is rotatably disposed within the base and is driven by a first drive motor. Rotating the first lead screw causes the two first centering clamping slides to move closer together to generate a symmetrical clamping force.

[0010] Furthermore, both the head and tail clamping gantry include a traveling gantry with an inverted U-shaped structure. Each traveling gantry has two sides located on either side of the positioning conveyor roller. A clamping cylinder is installed at the top of each traveling gantry. The free end of the clamping cylinder passes through the traveling gantry and is fixedly connected to the middle of the clamping roller. The clamping roller is movably mounted on two inner sides of the traveling gantry via lifting guide rails. The clamping cylinder drives the clamping roller to rise and fall on the traveling gantry, facilitating the clamping of the workpiece cover plate.

[0011] Furthermore, the workbench is equipped with two symmetrical traveling tracks located on both sides of the positioning conveyor roller. The bottom sides of each traveling gantry are movable and mounted on the traveling tracks via a traveling mechanism. The symmetrical arrangement of the traveling tracks ensures the straightness of the traveling gantry.

[0012] Furthermore, each traveling mechanism includes a housing, with guide rollers movably mounted on the traveling track at the four corners of the housing's bottom surface. A drive gear is rotatably mounted on the bottom surface of the housing via a traveling drive motor, and the drive gear meshes with a rack located on the side of the traveling track. This meshing connection between the drive gears ensures the traveling gantry's movement accuracy.

[0013] Furthermore, a second centering clamping mechanism is provided on the clamping roller of the tail clamping gantry. The second centering clamping mechanism includes a crossbeam, on which second centering clamping slides are symmetrically moved. The two second centering clamping slides are respectively threaded to both ends of the second lead screw, and the second lead screw is driven by the second drive motor.

[0014] Furthermore, the tail clamping gantry also includes a floating clamping wheel lifting mechanism. This mechanism comprises two guide seats, each vertically movable on two second-alignment clamping slides. Each guide seat has a floating clamping wheel mounted on it via a floating spring. The floating clamping wheels not only move vertically under the drive of the guide seats but also adaptively move laterally on the guide seats via the floating springs, thus accommodating workpieces of different heights and widths and expanding its applicability.

[0015] Furthermore, the welding structure includes two cross-shaped adjustment modules respectively mounted on guide seats, each with a welding torch fixed to it via a rotating slider module. The cross-shaped adjustment modules and the rotating slider module facilitate adjustment of the welding torch position.

[0016] Furthermore, the inner tube assembly includes a positioning inner tube movably mounted on the workpiece base plate. The top and bottom of the positioning inner tube are equipped with multiple cylindrical rollers for rolling connection with the workpiece base plate or workpiece cover plate. Both sides of the positioning inner tube are equipped with multiple U-shaped rollers for supporting the weld seams of the workpiece base plate or workpiece cover plate. The openings of the U-shaped rollers avoid the weld seams, preventing any impact on welding accuracy. Simultaneously, the two sides of the U-shaped rollers can respectively support the weld seam positions on the workpiece base plate and workpiece cover plate. Attached Figure Description

[0017] Figure 1 A schematic diagram of a rectangular, narrow, and long structural component welding device;

[0018] Figure 2 A schematic diagram of the positioning conveyor roller;

[0019] Figure 3 This is a schematic diagram of the first centering clamping mechanism;

[0020] Figure 4 A side view of a rectangular, narrow, and long structural component welding assembly device;

[0021] Figure 5 A schematic diagram of the structure where the head presses against the gantry;

[0022] Figure 6 This is a partial schematic diagram of the walking mechanism;

[0023] Figure 7 A front view of the tail section pressing against the gantry;

[0024] Figure 8 A schematic diagram of the floating clamping wheel lifting mechanism and the welded structure;

[0025] Figure 9 This is a schematic diagram of the inner tube assembly.

[0026] Figure 10 A front view showing the inner tube in place;

[0027] Among them: 1. Workbench; 11. Traveling rail; 111. Rack;

[0028] 2. Positioning conveyor roller; 21. Roller; 22. Drive reduction motor; 23. First centering clamping mechanism; 231. Base; 232. First centering clamping slide; 233. First lead screw; 234. First drive motor;

[0029] 3. Gantry clamping assembly; 31. Head gantry clamping assembly; 32. Tail gantry clamping assembly; 33. Traveling gantry; 331. Clamping cylinder; 332. Clamping roller; 333. Lifting guide rail; 34. Traveling mechanism; 341. Guide roller; 342. Drive gear; 343. Traveling drive motor; 35. Second centering clamping mechanism; 351. Crossbeam; 352. Second centering clamping slide; 353. Second lead screw; 354. Second drive motor; 36. Floating clamping wheel lifting mechanism; 361. Lead screw slider mechanism; 362. Guide seat; 363. Floating clamping wheel; 37. Welding structure; 371. Cross adjustment module; 372. Rotating slider module; 373. Welding torch;

[0030] 4. Inner tube assembly; 41. Positioning inner tube; 411. Cylindrical roller; 412. U-shaped roller; 42. Chain; 43. Third drive motor. Detailed Implementation

[0031] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0032] Existing welding methods for narrow and long structural components mainly involve mechanical tooling positioning followed by manual welding. Due to the long weld seams of these components, both production efficiency and welding quality are relatively low. To address these issues, this application provides a rectangular narrow and long structural component assembly welding device, comprising a worktable 1, a positioning conveyor roller 2, a clamping gantry assembly 3, an inner tube assembly 4, and a control assembly. This application positions the workpiece base plate on the positioning conveyor roller 2, moves the inner tube assembly 4 to the tail of the workpiece base plate, and then places the workpiece cover plate on top. The control assembly drives the head clamping gantry 31 and the tail clamping gantry 32 to clamp the two sides of the workpiece cover plate respectively. Finally, during the synchronous movement of the tail clamping gantry 32 and the inner tube assembly 4, the welding structure 37 completes the assembly welding of the workpiece base plate and the workpiece cover plate. Compared to manual welding, this process not only reduces the labor intensity of workers but also improves production efficiency and quality. A detailed demonstration follows.

[0033] refer to Figure 1 A rectangular narrow and long structural component welding device includes a worktable 1, a positioning conveying roller 2, a pressing gantry assembly 3, an inner tube assembly 4, and a control assembly.

[0034] The positioning conveying roller 2 is set on the worktable 1 and is used for positioning and conveying the workpiece base plate.

[0035] For details, please refer to Figure 2 and Figure 3 The positioning conveying roller 2 includes multiple rollers 21 arranged in a straight line and rotatably mounted on the worktable 1. All rollers 21 are connected to the drive reduction motor 22 via chain drive. This chain-driven multi-roller structure ensures stable conveying of the workpiece base plate. At least two first centering clamping mechanisms 23 for positioning the workpiece base plate are provided between the multiple rollers 21. The first centering clamping mechanism 23 can actively correct workpiece offset and improve positioning repeatability. The first centering clamping mechanism 23 includes a base 231 perpendicular to the workpiece base plate. First centering clamping slides 232 are slidably mounted at both ends of the base 231. The two first centering clamping slides are threadedly connected to both ends of a first lead screw 233. The first lead screw 233 is rotatably mounted within the base 231 and is driven by a first drive motor 234. The control component drives the first lead screw 233 to rotate via the first drive motor 234, thereby causing the first lead screw 233 to move the two first centering clamping slides closer together to generate symmetrical clamping forces.

[0036] refer to Figure 1 The clamping gantry assembly 3 includes a head clamping gantry 31 and a tail clamping gantry 32, both of which are movable along the center line of the workpiece base plate and are mounted on the worktable 1. Both the head clamping gantry 31 and the tail clamping gantry 32 are used to clamp the workpiece cover plate, and the tail clamping gantry 32 is provided with a welding structure 37 for welding the workpiece cover plate and the workpiece base plate.

[0037] For details, please refer to Figure 4 and Figure 5 Both the head clamping gantry 31 and the tail clamping gantry 32 include a traveling gantry 33 with an inverted U-shaped structure. Each traveling gantry 33 has two sides located on either side of the positioning conveying roller 2. Each traveling gantry 33 has a clamping cylinder 331 at its top. The free end of the clamping cylinder 331 passes through the traveling gantry 33 and is fixedly connected to the middle of the clamping roller 332. The clamping roller 332 is movably mounted on the two inner sides of the traveling gantry 33 via lifting guide rails 333. The free end of the clamping cylinder 331 is controlled vertically by a control assembly, thereby driving the clamping roller 332 to rise and fall on the traveling gantry 33, facilitating the clamping of the workpiece cover plate.

[0038] To ensure the straightness and movement accuracy of the traveling gantry 33, refer to Figure 5 and Figure 6 The workbench 1 is equipped with two symmetrically positioned travel tracks 11 on both sides of the positioning conveyor roller 2. Each traveling gantry 33 has its bottom sides movably mounted on the travel tracks 11 via a traveling mechanism 34. Each traveling mechanism 34 includes a housing, with guide rollers 341 movably mounted on the travel tracks 11 at the four corners of its bottom surface. A drive gear 342 is rotatably mounted on the bottom surface of the housing via a travel drive motor 343, and the drive gear 342 meshes with a rack 111 located on the side of the travel track 11. The control unit activates the travel drive motor 343 to rotate the drive gear 342, thereby moving the housing along the travel tracks 11.

[0039] In order to center and position the workpiece cover plate, refer to Figure 7 A second centering clamping mechanism 35 is provided on the clamping roller 332 of the tail clamping gantry 32. The second centering clamping mechanism 35 includes a crossbeam 351, on which a second centering clamping slide 352 is symmetrically moved. The two second centering clamping slides 352 are respectively threaded to both ends of the second lead screw 353. The second lead screw 353 is connected to the second drive motor 354 for transmission.

[0040] To ensure that the tail clamping gantry 32 can accommodate workpieces of different heights and widths, refer to... Figure 8 The tail clamping gantry 32 also includes a floating clamping wheel lifting mechanism 36. The floating clamping wheel lifting mechanism 36 includes two guide seats 362 that are vertically movable on two second centering clamping slides 352 via a screw-slider mechanism 361. Each guide seat 362 has a floating clamping wheel 363 mounted on it via a floating spring. The floating clamping wheel 363 can not only move vertically under the drive of the guide seats 362, but also adaptively move laterally on the guide seats 362 via the floating spring.

[0041] Specifically, each lead screw and slider mechanism 361 includes a linear guide rail, on which a slider threadedly connected to the lead screw is slidably mounted. The lead screw is connected to a lifting motor. The slider is fixedly connected to the guide seat 362, which is slidably mounted on the second pair of centering clamping slides 352. By starting two motors via a PLC, the two lead screws are rotated, thereby causing the two sliders to drive the two guide seats 362 to move vertically on the second pair of centering clamping slides 352.

[0042] Among them, reference Figure 8 The welding structure 37 includes two cross-shaped adjustment modules 371 respectively mounted on guide seats 362. Each cross-shaped adjustment module 371 has a welding torch 373 fixed to it via a rotating slider module 372. The welding wire for the welding torch 373 is fed by a wire feeder fixed to the traveling gantry 33. The cross-shaped adjustment modules 371 and the rotating slider module 372 facilitate adjustment of the position of the welding torch 373.

[0043] In this embodiment, both the cross adjustment module 371 and the rotary slider module 372 are existing technologies. The cross adjustment module 371 can be a cross manual adjustment slider of model ED-MJ2060, and the rotary slider module 372 can be a manual adjustment rotary slider of model MR60NC.

[0044] The inner tube assembly 4 is movably mounted on the workpiece base plate and is used to support the weld position between the workpiece base plate and the workpiece cover plate.

[0045] For details, please refer to Figure 9 and Figure 10 The inner tube assembly 4 includes a positioning inner tube 41 movably mounted on the workpiece base plate. The top and bottom of the positioning inner tube 41 are provided with multiple cylindrical rollers 411 for rolling connection with the workpiece base plate or workpiece cover plate. Multiple U-shaped rollers 412 are provided on both sides of the positioning inner tube 41 to support the weld seams of the workpiece base plate or workpiece cover plate. The openings of the U-shaped rollers 412 avoid the weld seams, preventing any impact on welding accuracy. Simultaneously, the two sides of the U-shaped rollers 412 can respectively support the weld seam positions on the workpiece base plate and workpiece cover plate.

[0046] To facilitate the synchronous movement of the positioning inner tube 41 on the workpiece base plate and the tail clamping gantry 32, the inner tube 41 can be moved directly by a drive motor to drive the cylindrical roller 411. Alternatively, the positioning inner tube 41 can be connected to a third drive motor 43 located in the middle of the head clamping gantry 31 by a chain 42 at one end, with the other end of the chain 42 passing through the workpiece base plate. The PLC drives the third drive motor 43 to rotate, thereby moving the positioning inner tube 41 on the chain 42.

[0047] The control component includes a PLC that is signal-connected to the positioning conveyor roller 2, the pressing gantry assembly 3, and the inner tube assembly 4, respectively. The control component in this embodiment is existing technology, using a PLC as the main control unit to coordinate various electrical components and complete the control of each function. It features simple and easy maintenance, high control precision, and stable operation, resulting in high system reliability, low failure rate, long-term safe and stable operation, and easy maintenance. It also has comprehensive protection functions, including overcurrent, phase loss, short circuit, and automatic stop in case of fault. The control component may also include a control cabinet and an operating console. The control cabinet mainly houses the PLC, drive system, and other electrical components, while the operating console is equipped with buttons, switches, emergency stop buttons, etc., for various operations of the equipment.

[0048] In summary, the working principle of this solution is as follows:

[0049] First, the workpiece base plate is placed on the positioning conveyor roller 2 for positioning and clamping, and the positioning inner tube 41 is controlled to move to the tail of the workpiece base plate. Then, the workpiece cover plate is placed on top. The head clamping gantry 31 and the tail clamping gantry 32 are driven by the PLC to clamp the two sides of the workpiece cover plate respectively. Finally, the tail clamping gantry 32 clamps the workpiece cover plate through the floating clamping wheel 363 and moves synchronously with the inner tube assembly 4. During the synchronous movement, the PLC controls the welding structure 37 to complete the welding of the workpiece base plate and the workpiece cover plate.

[0050] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A rectangular narrow long structural member assembly welding apparatus, characterized by, include: Workbench (1); Positioning conveying roller (2) is set on the worktable (1) and used for positioning and conveying the workpiece base plate; The clamping gantry assembly (3) includes a head clamping gantry (31) and a tail clamping gantry (32) that are both movable along the center line of the workpiece base plate on the worktable (1). The head clamping gantry (31) and the tail clamping gantry (32) are both used to clamp the workpiece cover plate, and the tail clamping gantry (32) is provided with a welding structure (37) for welding the workpiece cover plate and the workpiece base plate. Inner tube assembly (4) is movably disposed on the workpiece base plate and is used to support the weld position between the workpiece base plate and the workpiece cover plate; The control components are respectively connected to the positioning conveying roller (2), the pressing gantry assembly (3) and the inner tube assembly (4).

2. The rectangular narrow and long structural member assembly welding apparatus according to claim 1, wherein The positioning conveying roller (2) includes multiple rollers (21) arranged in a straight line and rotatably mounted on the worktable (1). The multiple rollers (21) are all connected to the drive reduction motor (22) by chain drive. At least two first centering clamping mechanisms (23) for positioning the workpiece base plate are provided between the multiple rollers (21).

3. The rectangular narrow and long structural member assembly welding apparatus according to claim 2, wherein Each of the first centering clamping mechanisms (23) includes a base (231) perpendicular to the workpiece base plate. The two ends of the base (231) are slidably provided with first centering clamping slides (232). The two first centering clamping slides are respectively threaded to the two ends of the first lead screw (233). The first lead screw (233) is rotatably disposed in the base (231) and is connected to the first drive motor (234) for transmission.

4. The rectangular narrow and long structural member assembly welding apparatus according to claim 1, wherein Both the head pressing gantry (31) and the tail pressing gantry (32) include a traveling gantry (33) with an inverted U-shaped structure. Each traveling gantry (33) has its two sides located on both sides of the positioning conveying roller (2). Each traveling gantry (33) has a pressing cylinder (331) at its top. The free end of the pressing cylinder (331) passes through the traveling gantry (33) and is fixedly connected to the middle of the pressing roller (332). Both sides of the pressing roller (332) are movably mounted on the two inner sides of the traveling gantry (33) via lifting guide rails (333).

5. The rectangular narrow and long structural member assembly welding apparatus according to claim 4, wherein The workbench (1) is provided with two walking tracks (11) respectively symmetrically located on both sides of the positioning conveying roller (2). The bottom sides of each walking gantry (33) are moved and set on the walking track (11) by the walking mechanism (34).

6. The rectangular narrow and long structural member assembly welding apparatus according to claim 5, wherein Each of the walking mechanisms (34) includes a housing, and guide rollers (341) that are movably mounted on the walking track (11) are provided at the four corners of the bottom surface of the housing. A drive gear (342) is rotatably mounted on the bottom surface of the housing via a walking drive motor (343), and the drive gear (342) is meshed with a rack (111) located on the side of the walking track (11).

7. The rectangular narrow and long structural member assembly welding apparatus according to claim 4, wherein The tail clamping gantry (32) is provided with a second centering clamping mechanism (35) on the clamping roller (332). The second centering clamping mechanism (35) includes a crossbeam (351). The crossbeam (351) is symmetrically provided with a second centering clamping slide (352). The two second centering clamping slides (352) are respectively threaded to both ends of the second lead screw (353). The second lead screw (353) is connected to the second drive motor (354) for transmission.

8. The rectangular narrow and long structural member assembly welding apparatus according to claim 7, wherein The tail clamping gantry (32) also includes a floating clamping wheel lifting mechanism (36), which includes two guide seats (362) that are vertically movable on two second centering clamping slides (352), and floating clamping wheels (363) are provided on the two guide seats (362) by means of floating springs.

9. The rectangular narrow and long structural member assembly welding apparatus according to claim 8, wherein The welding structure (37) includes two cross adjustment modules (371) respectively set on the guide seat (362), and each of the two cross adjustment modules (371) is fixed with a welding gun (373) by a rotating slider module (372).

10. The apparatus according to claim 4, wherein The inner tube assembly (4) includes a positioning inner tube (41) movably disposed on the workpiece base plate. The top and bottom of the positioning inner tube (41) are provided with a plurality of cylindrical rollers (411) for rolling connection with the workpiece base plate or the workpiece cover plate. Both sides of the positioning inner tube (41) are provided with a plurality of U-shaped rollers (412) for supporting the weld of the workpiece base plate or the workpiece cover plate.

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