Welding tool for crane mechanical arm

Abstract

The invention provides a crane mechanical arm welding tool, and belongs to the technical field of crane welding. The tool comprises a welding table, a positioning clamping plate, a pushing nut cylinder, a rack and a limiting baffle, a first supporting plate is fixedly arranged on the welding table, the positioning clamping plate is configured to slide along the welding table, the pushing nut cylinder is rotationally arranged on the first supporting plate, a pushing threaded rod is connected into the pushing nut cylinder through threads, and the positioning clamping plate is connected with the pushing threaded rod; a gear is fixedly arranged on the pushing nut cylinder, the rack is meshed with the gear, the rack is configured to move relative to the gear and used for driving the gear to rotate, the limiting baffle is used for limiting the moving distance of the rack, and the position of the limiting baffle is adjustable. The crane mechanical arm welding tool can meet the requirement for continuous welding of U-shaped steel plates and C-shaped steel plates.

Description

Technical Field

[0001] The invention belongs to the technical field of crane welding, in particular to a crane mechanical arm welding tool. Background Art

[0002] The crane arm, commonly known as the jib or boom, is a bidirectionally bent metal structure that supports the lifting rope, the fetching device or the luffing trolley. It is supported on the turntable or tower of the crane by connecting pins, wire ropes or hydraulic cylinders. The crane mechanical arm is welded in sections by multiple U-shaped arms, and each section of the U-shaped arm is a hollow structure welded by U-shaped steel plates and C-shaped steel plates.

[0003] In order to avoid deformation during welding, positioning fixtures are needed to position the U-shaped steel plates and C-shaped steel plates during welding to ensure the accurate positioning of the U-shaped steel plates and C-shaped steel plates during welding. Currently, the robotic arm is positioned by clamping and positioning from the outside of the robotic arm in conjunction with an internal reinforced keel.

[0004] In order to ensure the positioning effect of the U-shaped steel plate and the C-shaped steel plate and avoid misalignment between the U-shaped steel plate and the C-shaped steel plate during welding, the height of the positioning clamp needs to be higher than the height of the weld of the U-shaped steel plate and the C-shaped steel plate, and the U-shaped steel plate and the C-shaped steel plate are limited at the same time under the action of the positioning clamp. After the positioning clamp completes the fixing of the steel plate, it will block the fixed position of the weld of the U-shaped steel plate and the C-shaped steel plate, resulting in the inability to weld the U-shaped steel plate and the C-shaped steel plate continuously. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a crane mechanical arm welding tooling to at least partially solve the problems raised in the above background technology.

[0006] The present invention provides the following technical solution: A crane mechanical arm welding tooling proposed by the present invention comprises: A welding platform, on which a first supporting plate is fixedly provided; a positioning clamp plate configured to slide along the welding table; A pushing nut cylinder, wherein the pushing nut cylinder is rotatably arranged on the first supporting plate, a pushing threaded rod is threadedly connected in the pushing nut cylinder, the positioning clamping plate is connected to the pushing threaded rod, and a gear is fixedly arranged on the pushing nut cylinder; a rack meshing with the gear, the rack being configured to move relative to the gear, and the rack being used to drive the gear to rotate; The limit baffle is used to limit the moving distance of the rack, and the position of the limit baffle is adjustable.

[0007] Furthermore, two groups of support platforms are symmetrically arranged on both sides of the welding platform, the support platforms are located outside the first support plate, and rack drive mechanisms and baffle drive mechanisms are arranged on the support platforms.

[0008] Furthermore, the rack drive mechanism includes a shaft seat, on which a rack drive screw and a guide slide are provided, the rack drive screw is rotatably provided on the shaft seat, a rack drive motor is fixedly provided on the shaft seat, the output shaft of the rack drive motor is connected to the rack drive screw, a movable plate is threadedly connected to the rack drive screw, the movable plate is slidably provided on the guide slide, a push-pull cylinder is provided on the movable plate, and the rack is connected to the free end of the push-pull cylinder.

[0009] Furthermore, the baffle driving mechanism includes a guide cylinder, a guide groove is opened on the guide cylinder, a baffle driving motor is fixedly arranged in the guide cylinder, a baffle driving screw is rotatably arranged in the guide cylinder, the baffle driving screw is connected to the output shaft of the baffle driving motor, one end of the limit baffle is connected to the baffle driving screw through the driving screw block, and the other end of the limit baffle is slidably arranged in the guide groove.

[0010] Furthermore, a pressure control switch is provided on the limit baffle, and the pressure control switch is electrically connected to the push-pull cylinder.

[0011] Furthermore, the positioning clamps are symmetrically arranged on both sides of the welding table, and a plurality of positioning clamps are arranged along the length direction of one side of the welding table, and the pushing nut cylinder, the pushing threaded rod and the driving rack are all arranged corresponding to the positioning clamps; The guide cylinder is rotatably arranged on the shaft seat, and a rotating motor is fixedly arranged on the shaft seat. The guide cylinder is connected to the output shaft of the rotating motor. Multiple groups of guide grooves are provided along the circumferential direction of the guide cylinder. Multiple groups of limit baffles are provided in the length direction of the baffle driving screw. Multiple groups of limit baffles are respectively engaged and slidably arranged in multiple groups of guide grooves, and the limit baffles are arranged one by one with the pushing nut cylinders.

[0012] Furthermore, a position adjustment mechanism is provided at the bottom of the welding table, and two sets of internal auxiliary positioning mechanisms are symmetrically installed at both ends of the position adjustment mechanism.

[0013] Furthermore, the position adjustment mechanism includes a position adjustment motor, a bidirectional screw and a position adjustment slide rod, the position adjustment motor is fixed on the welding table, the bidirectional screw is rotatably arranged on the welding table, the bidirectional screw is connected to the output shaft of the position adjustment motor, the position adjustment slide rod is fixed on the welding table, two sets of threaded plates are symmetrically arranged at both ends of the bidirectional screw, and the threaded plates are slidably arranged on the position adjustment slide rod.

[0014] Further, the internal auxiliary positioning mechanism includes a push rod and a mounting seat, the push rod is connected to the threaded plate, the mounting seat is fixedly connected to the push rod, a lifting cylinder is fixedly arranged on the mounting seat, a bottom plate is arranged at the free end of the lifting cylinder, a second supporting plate is vertically arranged on the bottom plate, a plurality of groups of positioning nut cylinders are rotatably arranged on the second supporting plate, a plurality of groups of positioning threaded rods are threadedly connected in the positioning nut cylinder, and an internal positioning plate is installed at the free end of the positioning threaded rod; An internal positioning motor is fixedly provided on the second support plate, and synchronous sprockets are fixedly provided on the output shaft of the internal positioning motor and the positioning nut cylinder. Two adjacent groups of synchronous sprockets are connected by a synchronous chain, and the synchronous chain is meshed with the synchronous sprockets.

[0015] Further, a downward pressing positioning mechanism is provided on the first support plate, and the downward pressing positioning mechanism includes a downward pressing driving motor, and the downward pressing driving motor is fixedly provided on the first support plate, and a downward pressing nut cylinder is rotatably provided on the first support plate, and the downward pressing nut cylinder is provided with multiple groups, and belt pulleys are fixedly provided on the output shafts of the downward pressing nut cylinder and the downward pressing driving motor, and synchronous belts are sleeved on two adjacent groups of belt pulleys; A pressing threaded rod is provided in the pressing nut cylinder through a threaded connection, a mounting plate is provided at the upper end of the pressing threaded rod, a guide plate is provided on the first supporting plate, an anti-rotation rod is provided at the lower end of the mounting plate, and the anti-rotation rod penetrates and slides on the guide plate; The mounting plate is provided with a downward pressing mounting column, and a downward pressing rubber rod is installed at the free end of the downward pressing mounting column.

[0016] Furthermore, in order to prevent the downward pressing mounting column and the downward pressing rubber rod from affecting the convenient installation and removal of the U-shaped arm on the welding table, two sets of positioning grooves are provided on the mounting plate, a positioning plate is fixedly provided on the downward pressing mounting column, and a positioning assembly is movably provided on the positioning plate; The positioning assembly includes a positioning slide rod and a positioning spring. The positioning slide rod is slidably arranged on the positioning plate. A limiting protrusion is arranged at the upper end of the positioning slide rod, and a positioning protrusion is arranged at the middle and lower parts of the positioning slide rod. The positioning spring is sleeved on the positioning slide rod, and the two ends of the positioning spring are respectively connected to the positioning plate and the positioning protrusion, and the lower end of the positioning slide rod is adapted to the positioning groove.

[0017] The beneficial effects achieved by the present invention using the above structure are as follows: (1) Through the meshing of the rack and the gear, the position of the positioning clamp corresponding to the position where the U-shaped arm needs to be welded is individually driven and adjusted. When the positioning clamp is away from the U-shaped arm, the weld originally covered by the positioning clamp can be welded. After the welding is completed, the group of positioning clamps can be individually driven to return to the original position to reposition the U-shaped arm; (2) By setting a limit baffle that can be adjusted in position, the moving distance of the rack relative to the gear can be adjusted, thereby adjusting the number of rotations of the gear and the push nut tube, that is, the moving distance of the positioning clamp can be adjusted, so that the robotic arm welding tooling provided by this scheme can be better adapted to the positioning requirements of U-shaped arms of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall structure in a top view of an embodiment of the present invention; Figure 3 for Figure 2 A partial enlarged view of part A; Figure 4 for Figure 2 A partial enlarged view of part B; Figure 5 is a schematic diagram of a cross-sectional structure in a side view direction of an embodiment of the present invention; Figure 6 It is a schematic cross-sectional structural diagram of a guide cylinder according to an embodiment of the present invention; Figure 7 is a schematic diagram of a three-dimensional cross-sectional structure in a side view direction of an embodiment of the present invention; Figure 8 for Figure 7 A partial enlarged view of part C; Fig. 9 for Figure 7 A partial enlarged view of part D; Fig.10 It is a schematic diagram of the overall structure of an embodiment of the present invention when viewed from above; Fig.11 It is a structural schematic diagram of a downward pressing positioning mechanism according to an embodiment of the present invention; Fig.12 for Fig.11 A partial enlarged view of part E; Fig.13 This is a schematic diagram of the structure of placing a U-shaped wall according to an embodiment of the present invention; Fig.14 for Fig.13 A partial enlarged view of part F.

[0019] Among them, 1. welding table, 2. first support plate, 3. positioning splint, 4. pushing nut tube, 5. pushing threaded rod, 6. gear, 7. rack, 8. limit baffle, 9. support table, 10. shaft seat, 11. rack drive screw, 12. guide slide, 13. rack drive motor, 14. moving plate, 15. push-pull cylinder, 16. guide tube, 17. guide groove, 18. baffle drive motor, 19. baffle drive screw, 20. drive screw block, 21. rotating motor, 22. position adjustment motor, 23. bidirectional screw, 24. position adjustment slide, 25. threaded plate, 26. push rod, 27. installation Mounting seat, 28, lifting cylinder, 29, bottom plate, 30, second support plate, 31, positioning nut tube, 32, positioning threaded rod, 33, internal positioning plate, 34, internal positioning motor, 35, synchronous chain, 36, downward pressure drive motor, 37, downward pressure nut tube, 38, synchronous belt, 39, downward pressure threaded rod, 40, mounting plate, 41, guide plate, 42, anti-rotation rod, 43, downward pressure mounting column, 44, downward pressure rubber rod, 45, positioning groove, 46, positioning plate, 47, positioning slide rod, 48, positioning spring, 49, limiting protrusion, 50, positioning protrusion, 51, U-shaped steel plate, 52, C-shaped steel plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0022] This embodiment is an improvement made to address the technical problem that when the existing crane mechanical arm welding tooling is in use, the weld at the positioning clamp will be blocked by the positioning clamp, thereby causing the welding of the U-shaped steel plate and the C-shaped steel plate to be unable to be carried out continuously.

[0023] See also Figure 1 , Figure 3 , Figure 5 , Figure 7-Figure 9 , a crane mechanical arm welding tool provided in this embodiment includes: A welding platform 1, on which a first supporting plate 2 is fixed; The positioning clamping plate 3 is configured to slide along the welding table 1. The position of the positioning clamping plate 3 is adjusted by sliding the positioning clamping plate 3 to meet the positioning requirements of U-shaped arms of different sizes; The pushing nut cylinder 4 is rotatably arranged on the first supporting plate 2. A pushing threaded rod 5 is threadedly connected in the pushing nut cylinder 4. The positioning clamping plate 3 is connected to the pushing threaded rod 5. The pushing nut cylinder 4 and the pushing threaded rod 5 drive the positioning clamping plate 3 to slide along the welding table 1. A gear 6 is fixed on the pushing nut cylinder 4. a rack 7 meshing with the gear 6, the rack 7 being configured to move relative to the gear 6, and the rack 7 being used to drive the gear 6 to rotate; The limit baffle 8 is used to limit the moving distance of the rack 7. The position of the limit baffle 8 is adjustable. By adjusting the position of the limit baffle 8, the moving distance of the rack 7 is adjusted, thereby controlling the number of rotations of the gear 6, and finally controlling the moving distance of the positioning clamp 3 to meet the clamping and positioning requirements of U-shaped arms of different sizes.

[0024] It is worth noting that a slide groove is provided on the welding table 1, and a slide plate is provided at the lower end of the positioning clamp plate 3. The slide plate is slidably engaged in the slide groove. The movement of the positioning clamp plate 3 is driven by pushing the nut tube 4 and the pushing threaded rod 5, and is guided by the slide plate and the slide groove to ensure that the positioning clamp plate 3 slides stably along the upper surface of the welding table 1.

[0025] Specifically, see Figure 1 In this embodiment, two groups of support platforms 9 are symmetrically provided on both sides of the welding table 1. The support platforms 9 are located on the outer side of the first support plate 2. A rack driving mechanism and a baffle driving mechanism are provided on the support platforms 9. The rack driving mechanism is used to drive the rack 7 to move relative to the gear 6, and the baffle driving mechanism is used to drive the limit baffle 8 to move relative to the rack driving mechanism, so as to adjust the distance between the limit baffle 8 and the baffle.

[0026] Specifically, see Figure 5-Figure 9In this embodiment, the rack drive mechanism includes a shaft seat 10, on which a rack drive screw 11 and a guide slide 12 are provided, the rack drive screw 11 is rotatably provided on the shaft seat 10, a rack drive motor 13 is fixedly provided on the shaft seat 10, the output shaft of the rack drive motor 13 is connected to the rack drive screw 11, a moving plate 14 is threadedly connected to the rack drive screw 11, the moving plate 14 is slidably provided on the guide slide 12, a push-pull cylinder 15 is provided on the moving plate 14, and the rack 7 It is connected to the free end of the push-pull cylinder 15. When working, the movable plate 14 moves under the drive of the rack driving screw 11 and the limiting guiding action of the guide slide rod 12. When the movable plate 14 moves, it drives the rack 7 to move synchronously with it. The push-pull cylinder 15 is used to adjust the height of the rack 7 relative to the gear 6. When the push-pull cylinder 15 extends, the rack 7 meshes with the gear 6. When the push-pull cylinder 15 contracts, the rack 7 moves away from the gear 6. At this time, the movable plate 14 cannot drive the gear to rotate when driving the rack 7 to move.

[0027] Specifically, see Figure 6 and Fig. 9 In this embodiment, the baffle driving mechanism includes a guide cylinder 16, a guide groove 17 is opened on the guide cylinder 16, a baffle driving motor 18 is fixedly provided in the guide cylinder 16, a baffle driving screw 19 is rotatably provided in the guide cylinder 16, the baffle driving screw 19 is connected to the output shaft of the baffle driving motor 18, one end of the limit baffle 8 is connected to the baffle driving screw 19 through the driving screw block 20, and the other end of the limit baffle 8 is slidably arranged in the guide groove 17. The position of the limit baffle 8 is adjusted under the driving action of the baffle driving screw 19 and the guiding action of the guide groove 17, and the specific position adjustment of the limit baffle 8 is controlled according to the size of the U-shaped arm.

[0028] Specifically, see Figure 5 In this embodiment, a pressure control switch is provided on the limit baffle 8, and the pressure control switch is electrically connected to the push-pull cylinder 15. When working, the movable plate 14 is driven by the rack driving screw 11 and guided by the guide slide bar 12 to achieve position adjustment. When the movable plate 14 contacts the pressure control switch, it means that the rack 7 drives the gear 6 to rotate into place. At this time, the positioning clamping plate 3 can just clamp and fix the U-shaped arm. Under the action of the pressure control switch, the push-pull cylinder 15 is controlled to shrink to prevent the moving rack 7 from driving the gear 6 again.

[0029] It should be noted that the pressure control switch adopts the existing technology, and its structure and working principle will not be described in detail in this solution.

[0030] Specifically, see Figure 5 , Figure 6 and Figure 8In this embodiment, the positioning clamps 3 are symmetrically arranged on both sides of the welding table 1, and multiple groups of positioning clamps 3 are arranged along the length direction of one side of the welding table 1. The pushing nut cylinder 4, the pushing threaded rod 5 and the driving rack 7 are all arranged corresponding to the positioning clamps 3. The U-shaped arm is positioned at multiple points along the length direction of the U-shaped arm by setting multiple groups of positioning clamps 3; The guide cylinder 16 is rotatably arranged on the shaft seat 10, and a rotating motor 21 is fixedly arranged on the shaft seat 10. The guide cylinder 16 is connected to the output shaft of the rotating motor 21. A plurality of guide grooves 17 are provided along the circumferential direction of the guide cylinder 16. A plurality of limit baffles 8 are provided in the length direction of the baffle driving screw 19. The plurality of limit baffles 8 are respectively engaged and slidably arranged in the plurality of guide grooves 17. The limit baffles 8 are arranged in a one-to-one correspondence with the pushing nut cylinder 4. By setting the plurality of limit baffles 8, when the rack 7 moves to the position of the gear 6 on each pushing nut cylinder 4, the number of rotations of the corresponding pushing nut cylinder 4 can be controlled respectively.

[0031] During operation, firstly, the position of the limit baffle 8 on the baffle driving screw 19 is adjusted according to the required sliding length of the positioning clamp 3.

[0032] When welded to the position where a group of positioning clamps 3 fix the U-shaped arm, the driving rack 7 moves to the pushing nut tube 4 corresponding to the group of positioning clamps 3, and the gear 6 is driven to rotate through the meshing of the rack 7 and the gear 6, and the gear 6 drives the pushing nut tube 4 to rotate, and under the guidance of the slide groove and the driving cooperation between the pushing nut tube 4 and the pushing threaded rod 5, the positioning clamp 3 is driven away from the U-shaped arm. At this time, the joint position of the U-shaped steel plate 51 and the C-shaped steel plate 52 is exposed to the weld for welding; after welding is completed, the driving rack 7 moves in the opposite direction, and the rack 7 can drive the pushing nut tube 4 to rotate in the opposite direction by meshing with the gear 6. The moving distance of the rack 7 is limited by the position of the limiting baffle 8, and the number of reverse rotations of the pushing nut tube 4 is controlled by the moving distance of the rack 7. When the moving plate 14 contacts the limiting baffle 8, the positioning clamp 3 just moves to contact with the U-shaped arm and clamps and positions the U-shaped arm again.

[0033] Specifically, see Fig.10 In this embodiment, a position adjustment mechanism is provided at the bottom of the welding table 1, and two sets of internal auxiliary positioning mechanisms are symmetrically installed at both ends of the position adjustment mechanism. When the U-shaped arm needs to be installed or removed from the welding table 1, the internal auxiliary positioning mechanism is moved down from the welding table 1 through the position adjustment mechanism. After the U-shaped arm is placed, the internal auxiliary positioning mechanism is moved into the U-shaped steel plate 51 through the position adjustment mechanism, and the U-shaped steel plate 51 and the C-shaped steel plate 52 are positioned from the inside, and the U-shaped steel plate 51 is fixed and positioned from the inside during the welding process.

[0034] Specifically, see Fig.10In this embodiment, the position adjustment mechanism includes a position adjustment motor 22, a bidirectional screw 23 and a position adjustment slide 24. The position adjustment motor 22 is fixed on the welding table 1, the bidirectional screw 23 is rotatably arranged on the welding table 1, the bidirectional screw 23 is connected to the output shaft of the position adjustment motor 22, the position adjustment slide 24 is fixed on the welding table 1, and two groups of threaded plates 25 are symmetrically arranged at both ends of the bidirectional screw 23. The threaded plates 25 are slidably arranged on the position adjustment slide 24. The position adjustment of the threaded plates 25 can be achieved under the drive of the bidirectional screw 23 and the guiding action of the position adjustment slide 24.

[0035] Specifically, see Figure 1 , Figure 2 , Figure 4 , Figure 5 and Fig.10 In this embodiment, the internal auxiliary positioning mechanism includes a push rod 26 and a mounting seat 27. The push rod 26 is connected to the threaded plate 25. The mounting seat 27 is fixedly connected to the push rod 26. A lifting cylinder 28 is fixedly provided on the mounting seat 27. A bottom plate 29 is provided at the free end of the lifting cylinder 28. A second support plate 30 is vertically provided on the bottom plate 29. A plurality of groups of positioning nut cylinders 31 are rotatably provided on the second support plate 30. A plurality of groups of positioning threaded rods 32 are threadedly connected in the positioning nut cylinder 31. An internal positioning plate 33 is installed at the free end of the positioning threaded rod 32. When the internal positioning plate 33 is pushed to fit the inner wall of the U-shaped steel plate 51, the internal positioning of the U-shaped steel plate 51 can be completed. Specifically, see Figure 4 In this embodiment, an internal positioning motor 34 is fixedly provided on the second support plate 30, and a synchronous sprocket is fixedly provided on the output shaft of the internal positioning motor 34 and the positioning nut tube 31. Two adjacent sets of synchronous sprockets are connected by a synchronous chain 35, and the synchronous chain 35 is meshed with the synchronous sprocket. Under the transmission action of the synchronous sprocket and the synchronous chain 35, multiple sets of positioning nut tubes 31 rotate synchronously, thereby driving multiple sets of positioning threaded rods 32 to rotate synchronously, and the multiple sets of positioning threaded rods 32 cooperate to drive the internal positioning plate 33 to move.

[0036] It should be noted that the thread directions at the two ends of the positioning nut tube 31 are opposite, and two groups of positioning threaded rods 32 are correspondingly provided at the two ends of the positioning nut tube 31, and two groups of internal positioning plates 33 are symmetrically provided. The two groups of internal positioning plates 33 are respectively connected to the positioning threaded rods 32 at the two ends of the positioning nut tube 31, and positioning is performed from both sides of the interior of the U-shaped steel plate 51 through the setting of the two groups of internal positioning plates 33.

[0037] Specifically, see Figure 3 and Fig.11In this embodiment, a downward pressing positioning mechanism is provided on the first support plate 2, and the downward pressing positioning mechanism includes a downward pressing driving motor 36, which is fixedly provided on the first support plate 2, and a downward pressing nut cylinder 37 is rotatably provided on the first support plate 2, and a plurality of downward pressing nut cylinders 37 are provided, and belt pulleys are fixedly provided on the output shafts of the downward pressing nut cylinder 37 and the downward pressing driving motor 36, and synchronous belts 38 are sleeved on two adjacent groups of belt pulleys, and under the cooperation of the synchronous belt 38 and the belt pulley, the downward pressing driving motor 36 simultaneously drives the plurality of groups of downward pressing nut cylinders 37 to rotate; A pressing threaded rod 39 is provided in the pressing nut cylinder 37 through a threaded connection, a mounting plate 40 is provided at the upper end of the pressing threaded rod 39, a guide plate 41 is provided on the first support plate 2, an anti-rotation rod 42 is provided at the lower end of the mounting plate 40, and the anti-rotation rod 42 penetrates and slides on the guide plate 41, and the mounting plate 40 can be vertically lifted and lowered by driving the pressing threaded rod 39 and guiding the anti-rotation rod 42; The mounting plate 40 is provided with a downward pressing mounting column 43, and a downward pressing rubber rod 44 is installed at the free end of the downward pressing mounting column 43. When the mounting plate 40 descends, the downward pressing rubber rod 44 is driven to press on the C-shaped steel plate 52 to achieve the longitudinal positioning of the U-shaped arm.

[0038] Specifically, see Fig.12 and Fig.14 In this embodiment, in order to prevent the pressing down mounting column 43 and the pressing down rubber rod 44 from affecting the convenient installation and removal of the U-shaped arm on the welding table 1, two sets of positioning grooves 45 are opened on the mounting plate 40, and a positioning plate 46 is fixedly provided on the pressing down mounting column 43, and a positioning component is movably provided on the positioning plate 46; The positioning assembly includes a positioning slide bar 47 and a positioning spring 48. The positioning slide bar 47 is slidably arranged on the positioning plate 46. The upper end of the positioning slide bar 47 is provided with a limiting protrusion 49, and the middle and lower part of the positioning slide bar 47 is provided with a positioning protrusion 50. The positioning spring 48 is sleeved on the positioning slide bar 47. The two ends of the positioning spring 48 are respectively connected to the positioning plate 46 and the positioning protrusion 50. The lower end of the positioning slide bar 47 is adapted to the positioning groove 45. Under the action of the positioning spring 48, the lower end of the positioning slide bar 47 is stably embedded in the positioning groove 45, and the direction of the downward pressing installation column 43 is stably limited. During operation, when the downward pressing installation column 43 is adjusted to the top of the U-shaped arm, the downward pressing rubber rod 44 can be stably pressed on the U-shaped arm to fix the downward pressing of the U-shaped arm. When the downward pressing installation column 43 is adjusted to one side of the U-shaped arm, the installation and removal of the U-shaped arm can be realized.

[0039] It should be noted that, in order to expand the applicability of the downward pressing positioning mechanism, the downward pressing nut tube 37 is embedded in the support plate, and the downward pressing positioning mechanism can be better applicable to the welding positioning of the U-shaped arm with a low height.

[0040] The crane mechanical arm welding tool provided in this embodiment refers to Figure 1 , the two sets of bottom plates 29 are completely moved to the outside of the welding table 1, without blocking the welding table 1, which is the initial state of the tooling, and its working principle is as follows: (1) Place the U-shaped steel plate 51 in the middle of the welding table 1, start the position adjustment motor 22 to rotate forward, the position adjustment motor 22 drives the bidirectional screw 23 to rotate, and the threaded plate 25 is driven to move under the driving of the bidirectional screw 23 and the guiding action of the position adjustment slide bar 24. The threaded plate 25 drives the bottom plate 29 to move to the top of the bottom wall of the U-shaped steel plate 51 through the push rod 26 and the mounting seat 27; The lifting cylinder 28 is controlled to retract, and the lifting cylinder 28 drives the bottom plate 29 to move downward, and the bottom plate 29 is placed on the bottom wall of the U-shaped steel plate 51, and the internal positioning motor 34 is started. Under the driving action of the synchronous chain 35 and the synchronous sprocket, the internal positioning motor 34 drives the positioning nut cylinder 31 to rotate, and the positioning nut cylinder 31 cooperates to drive the corresponding positioning threaded rods 32 to move, and the multiple groups of positioning threaded rods 32 cooperate to drive the corresponding internal positioning plates 33 to move, and the U-shaped steel plate 51 is positioned from both sides of the inside of the U-shaped steel plate 51 through the two groups of internal positioning plates 33; (2) See later Fig.13 , in the initial state, the positioning clamp 3 does not contact the U-shaped arm for positioning; First, the rotating motor 21 is started to drive the guide cylinder 16 to rotate, so that the first group of limit baffles 8 rotate to one side of the movable plate 14, and the baffle driving motor 18 is started. The baffle driving motor 18 drives the baffle driving screw 19 to rotate. Under the driving action of the baffle driving screw 19 and the guiding and limiting action of the guide groove 17, the driving screw block 20 drives the limit baffle 8 to move, and the position of the limit baffle 8 is adjusted. The distance between the limit baffle 8 and the head end of the movable plate 14 is the moving distance of the rack 7; The rack drive motor 13 is started to rotate forward, and the rack drive motor 13 drives the rack drive screw 11 to rotate, and the moving plate 14 is driven to move under the driving action of the rack drive screw 11 and the guiding action of the guide slide bar 12, referring to Fig.13 , the moving plate 14 drives the rack 7 to move from left to right. Since the rack 7 and the gear 6 are meshed, the rack 7 drives the gear 6 to rotate during the movement, and the gear 6 drives the corresponding pushing nut tube 4 to rotate, pushing the threaded rod 5 to drive the positioning clamping plate 3 to move in the direction close to the U-shaped arm U-shaped steel plate 51, and the positioning clamping plate 3 clamps the U-shaped steel plate 51; when the moving plate 14 moves to contact with the limit baffle 8, the limit baffle 8 controls the push-pull cylinder 15 to shrink, and the lifting cylinder drives the rack 7 to move down and away from the gear 6; after the lifting cylinder shrinks, the rotating motor 21 drives the guide cylinder 16 to rotate, driving the next set of limit baffles 8 to move to the position facing the moving plate 14, waiting for the next set of gears 6 to drive and rotate to limit; Afterwards, the rack 7 is driven to continue to move to the right under the action of the rack drive motor 13. When the rack 7 is completely removed from the bottom of the rack 7, the push-pull cylinder 15 is driven to extend and drive the rack 7 to return to its original height. As the rack 7 continues to move to the right, the multiple groups of positioning clamps 3 are sequentially driven to approach the U-shaped steel plate 51 and fix the U-shaped steel plate 51. (3) After the U-shaped steel plate 51 is fixed, the C-shaped steel plate 52 is placed on top of the U-shaped steel plate 51 to align the two. (4) First, pull the limiting protrusion 49 upward, and the limiting protrusion 49 drives the positioning slide bar 47 to move upward, and the lower end of the positioning slide bar 47 moves out of the positioning groove 45. At this time, the positioning spring 48 is compressed, and the downward pressing installation column 43 is rotated to move the downward pressing rubber rod 44 to the top of the C-shaped steel plate 52. The limiting protrusion 49 is released, and the positioning spring 48 drives the lower end of the positioning slide bar 47 to be embedded in the positioning groove 45, completing the fixing of the direction of the downward pressing installation column 43; The pressing drive motor 36 is started, and the pressing nut barrel 37 is driven to rotate under the action of the synchronous belt 38 and the belt pulley, and the pressing nut barrel 37 drives the pressing threaded rod 39 to rise and fall, and at the same time, cooperates with the guidance of the anti-rotation rod 42 to drive the pressing rubber rod 44 to press on the C-shaped steel plate 52, so as to complete the positioning and installation between the U-shaped steel plate 51 and the C-shaped steel plate 52; (5) Start the position adjustment motor 22 to reverse, and under the driving action of the position adjustment motor 22, the two sets of bottom plates 29 are moved to the bottom wall of the U-shaped steel plate 51, and the lifting cylinder 28 is started to retract, and the lifting cylinder 28 drives the bottom plate 29 to be placed on the bottom wall of the U-shaped steel plate 51; start the internal positioning motor 34, and under the cooperation of the synchronous chain 35 and the synchronous sprocket, the positioning threaded cylinder is driven to rotate, and the positioning nut cylinder 31 drives the internal positioning plate 33 through the positioning threaded rod 32, and the internal positioning plate 33 is attached to the inner wall of the U-shaped steel plate 51, so as to further position the U-shaped steel plate 51; Through the above process, the positioning and installation of the U-shaped steel plate 51 and the C-shaped steel plate 52 can be completed; (6) Then, the U-shaped steel plate 51 and the C-shaped steel plate 52 are welded from right to left. Before welding to the welding position corresponding to the rightmost set of positioning clamps 3, the gear 6 is first started to drive the motor to reverse. Under the cooperation of the rack drive screw 11 and the guide slide bar 12, the movable plate 14 is driven to move from right to left. The rack 7 drives the gear 6 to reverse, thereby driving the positioning clamps 3 away from the U-shaped steel plate 51. When the right end of the rack 7 is completely removed from under the gear 6, the movement stops; (7) After that, the original shielding position of the positioning clamping plate 3 can be welded. After the welding is completed, the gear 6 is started to drive the motor to rotate forward, and the movable plate 14 is driven to move from left to right under the cooperation of the rack drive screw 11 and the guide slide bar 12. When the movable plate 14 contacts the limit baffle 8, it means that the positioning clamping plate 3 is clamped in place again; Then, as the welding is continued from right to left, steps (6) and (7) are repeated in sequence to complete the continuous welding of the entire length of the U-shaped steel plate 51 and the C-shaped steel plate 52.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, material or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, material or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crane mechanical arm welding tool, characterized in that: include: A welding platform (1), wherein a first supporting plate (2) is fixedly provided on the welding platform (1); A positioning clamp (3) configured to slide along the welding table (1); A pushing nut cylinder (4), the pushing nut cylinder (4) being rotatably mounted on the first support plate (2), a pushing threaded rod (5) being threadedly connected to the inside of the pushing nut cylinder (4), the positioning clamping plate (3) being connected to the pushing threaded rod (5), and a gear (6) being fixedly mounted on the pushing nut cylinder (4); a rack (7) meshing with the gear (6), the rack (7) being configured to move relative to the gear (6), and the rack (7) being used to drive the gear (6) to rotate; The limit baffle (8) is used to limit the moving distance of the rack (7), and the position of the limit baffle (8) is adjustable.

2. The crane mechanical arm welding tooling according to claim 1 is characterized in that: Two groups of support platforms (9) are symmetrically arranged on both sides of the welding platform (1); the support platforms (9) are located outside the first support plate (2); and a rack drive mechanism and a baffle drive mechanism are arranged on the support platforms (9).

3. The crane mechanical arm welding tooling according to claim 2 is characterized in that: The rack drive mechanism comprises a shaft seat (10), on which a rack drive screw (11) and a guide slide bar (12) are provided, the rack drive screw (11) is rotatably arranged on the shaft seat (10), a rack drive motor (13) is fixedly arranged on the shaft seat (10), the output shaft of the rack drive motor (13) is connected to the rack drive screw (11), a movable plate (14) is threadedly connected to the rack drive screw (11), the movable plate (14) is slidably arranged on the guide slide bar (12), a push-pull cylinder (15) is provided on the movable plate (14), and the rack (7) is connected to the free end of the push-pull cylinder (15).

4. The crane mechanical arm welding tooling according to claim 3 is characterized in that: The baffle driving mechanism comprises a guide cylinder (16), a guide groove (17) is formed on the guide cylinder (16), a baffle driving motor (18) is fixedly provided in the guide cylinder (16), a baffle driving screw (19) is rotatably provided in the guide cylinder (16), the baffle driving screw (19) is connected to an output shaft of the baffle driving motor (18), one end of the limit baffle (8) is connected to the baffle driving screw (19) via a driving screw block (20), and the other end of the limit baffle (8) is slidably disposed in the guide groove (17); The limit baffle (8) is provided with a pressure control switch, and the pressure control switch is electrically connected to the push-pull cylinder (15).

5. The crane mechanical arm welding tooling according to claim 4, characterized in that: The positioning clamps (3) are symmetrically arranged on both sides of the welding platform (1), and a plurality of positioning clamps (3) are arranged along the length direction of one side of the welding platform (1), and the pushing nut cylinder (4), the pushing threaded rod (5) and the driving rack (7) are all arranged corresponding to the positioning clamps (3); The guide cylinder (16) is rotatably mounted on the shaft seat (10), a rotating motor (21) is fixedly mounted on the shaft seat (10), the guide cylinder (16) is connected to the output shaft of the rotating motor (21), a plurality of guide grooves (17) are provided along the circumferential direction of the guide cylinder (16), a plurality of limit baffles (8) are provided along the length direction of the baffle driving screw (19), a plurality of groups of limit baffles (8) are respectively engaged and slidably mounted in the plurality of groups of guide grooves (17), and the limit baffles (8) are provided one-to-one with the pushing nut cylinder (4).

6. The crane mechanical arm welding tooling according to claim 1, characterized in that: A position adjustment mechanism is provided at the bottom of the welding table (1), and two sets of internal auxiliary positioning mechanisms are symmetrically installed at both ends of the position adjustment mechanism.

7. The crane mechanical arm welding tooling according to claim 6, characterized in that: The position adjustment mechanism comprises a position adjustment motor (22), a bidirectional screw (23) and a position adjustment slide bar (24); the position adjustment motor (22) is fixedly mounted on the welding table (1); the bidirectional screw (23) is rotatably mounted on the welding table (1); the bidirectional screw (23) is connected to an output shaft of the position adjustment motor (22); the position adjustment slide bar (24) is fixedly mounted on the welding table (1); two groups of threaded plates (25) are symmetrically arranged at both ends of the bidirectional screw (23); and the threaded plates (25) are slidably mounted on the position adjustment slide bar (24).

8. The crane mechanical arm welding tooling according to claim 7, characterized in that: The internal auxiliary positioning mechanism comprises a push rod (26) and a mounting seat (27), wherein the push rod (26) is connected to the threaded plate (25), and the mounting seat (27) is fixedly connected to the push rod (26); a lifting cylinder (28) is fixedly provided on the mounting seat (27); a bottom plate (29) is provided at the free end of the lifting cylinder (28); a second support plate (30) is vertically provided on the bottom plate (29); a plurality of groups of positioning nut cylinders (31) are rotatably provided on the second support plate (30); a plurality of groups of positioning threaded rods (32) are threadedly connected in the positioning nut cylinder (31), and an internal positioning plate (33) is installed at the free end of the positioning threaded rod (32); An internal positioning motor (34) is fixedly provided on the second support plate (30), and a synchronous sprocket is fixedly provided on the output shaft of the internal positioning motor (34) and the positioning nut cylinder (31), and two adjacent sets of synchronous sprockets are connected by a synchronous chain (35), and the synchronous chain (35) is meshed with the synchronous sprocket.

9. The crane mechanical arm welding tooling according to claim 1, characterized in that: A downward pressing positioning mechanism is provided on the first support plate (2), and the downward pressing positioning mechanism comprises a downward pressing driving motor (36), the downward pressing driving motor (36) is fixedly arranged on the first support plate (2), a downward pressing nut cylinder (37) is rotatably arranged on the first support plate (2), and the downward pressing nut cylinder (37) is provided with a plurality of groups, and belt pulleys are fixedly arranged on the output shafts of the downward pressing nut cylinder (37) and the downward pressing driving motor (36), and synchronous belts (38) are sleeved on two adjacent groups of belt pulleys; A pressing threaded rod (39) is provided in the pressing nut tube (37) through a threaded connection, a mounting plate (40) is provided at the upper end of the pressing threaded rod (39), a guide plate (41) is provided on the first support plate (2), an anti-rotation rod (42) is provided at the lower end of the mounting plate (40), and the anti-rotation rod (42) penetrates and is slidably provided on the guide plate (41); A downward pressing installation column (43) is provided on the installation plate (40), and a downward pressing rubber rod (44) is installed at the free end of the downward pressing installation column (43).

10. The crane mechanical arm welding tooling according to claim 9, characterized in that: The mounting plate (40) is provided with two groups of positioning grooves (45), a positioning plate (46) is fixedly provided on the downward pressing mounting column (43), and a positioning component is movably provided on the positioning plate (46); The positioning assembly comprises a positioning slide bar (47) and a positioning spring (48). The positioning slide bar (47) is slidably disposed on the positioning plate (46). A limiting protrusion (49) is disposed at the upper end of the positioning slide bar (47). A positioning protrusion (50) is disposed at the middle and lower part of the positioning slide bar (47). The positioning spring (48) is sleeved on the positioning slide bar (47). Two ends of the positioning spring (48) are respectively connected to the positioning plate (46) and the positioning protrusion (50). The lower end of the positioning slide bar (47) is adapted to the positioning groove (45).

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