Automatic centering tool for welding ear hinge and chord tube assembly

Abstract

The invention discloses an automatic centering tool for welding ear hinges and string tubes, comprising a base and a slide, the slide is slidably mounted on the base, the slide is equipped with a positioning mechanism inserted between a pair of ear plates of the ear hinge, the slide is equipped with a floating mechanism, the floating mechanism is equipped with a centering clamping mechanism inserted into a pair of ear holes of the ear hinge, the base is equipped with a lifting mechanism for supporting the bottom of the ear hinge, the base is equipped with a camera mechanism for identifying the center position of the ear hinge and the string tube, and the centering clamping mechanism and the lifting mechanism move to corresponding positions according to the identification result of the camera mechanism. The centering tool has the advantages of high positioning accuracy, low labor intensity, high degree of automation, and can improve welding quality and welding efficiency.

Description

Technical Field

[0001] The invention mainly relates to a welding technology for a main chord tube, in particular to an automatic centering tool for welding an ear hinge and a chord tube assembly. Background Art

[0002] A crane is a type of engineering machinery that can perform operations such as lifting, transporting, loading and unloading of materials. It is widely used in construction, transportation, ports, energy, farmland irrigation and other fields, such as building bridges, installing power generation equipment, shipbuilding, erecting wind turbines, etc.

[0003] In recent years, with the development of large-scale engineering projects such as petrochemical, nuclear power and steel, the demand for hoisting of super-large equipment has increased, which has put forward higher requirements on the lifting height and lifting capacity of cranes. The boom is one of the important structural parts of the crane, and the performance of the boom has an important influence on the lifting height and lifting capacity of the crane.

[0004] The boom is spliced ​​by main chord tubes, which mainly include chord tubes, with joints connected to the ends of the chord tubes, and ear hinges are welded on the joints to realize the splicing of chord tubes of different sections. Since the ear hinges and the ends of the chord tubes are circularly welded, the alignment of the ear hinges and the ends of the chord tubes is very important. In the prior art, the ear hinges are directly connected to the ends of the chord tubes manually. Before and during welding, small displacements will occur between the ear hinges and the chord tubes, which seriously affects the welding quality and efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an automatic centering tool for welding ear hinges and chord tube assemblies which has high positioning accuracy, low labor intensity, high degree of automation and can improve welding quality and welding efficiency.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An automatic centering tool for welding an ear hinge and a chord tube assembly, comprising a base and a slide, wherein the slide is slidably mounted on the base, the slide is provided with a positioning mechanism inserted between a pair of ear plates of the ear hinge, the slide is provided with a floating mechanism, the floating mechanism is provided with a centering clamping mechanism inserted into a pair of ear holes of the ear hinge, the base is provided with a lifting mechanism for supporting the bottom of the ear hinge, the base is provided with a photographing mechanism for identifying the center position of the ear hinge and the chord tube, and the centering clamping mechanism and the lifting mechanism move to corresponding positions according to the identification results of the photographing mechanism.

[0008] As a further improvement of the above technical solution:

[0009] The positioning mechanism comprises a fixing plate and a T-shaped insert block. The fixing plate is fixedly mounted on the slide table, and the T-shaped insert block is fixedly mounted on the fixing plate and inserted between a pair of ear plates of the ear hinge.

[0010] The centering clamping mechanism includes a fixed platform, a clamping drive and a pair of clamping platforms, wherein the fixed platform is mounted on a floating mechanism, the clamping drive is mounted on the fixed platform, a pair of clamping platforms are mounted on the clamping drive, and the clamping drive drives a pair of clamping platforms to be inserted into a pair of ear holes of the ear hinge and clamp the ear hinge.

[0011] The clamping drive component includes a clamping drive motor, a transmission gear, a pair of transmission racks and a pair of transmission plates. The clamping drive motor is fixedly mounted on a fixed platform, a pair of transmission plates are slidably mounted on the fixed platform, and one of the transmission plates is connected to the output end of the clamping drive motor, a pair of transmission racks are respectively mounted on corresponding transmission plates, the transmission gear is fixedly mounted on the fixed platform and meshes with a pair of transmission racks, and a pair of clamping platforms are respectively mounted on corresponding transmission plates.

[0012] The fixed platform is provided with slide rails, and a pair of transmission plates are slidably mounted on the corresponding slide rails.

[0013] The clamping platform comprises a clamping mounting seat, a plug post and a clamping plate. The clamping mounting seat is fixedly mounted on the corresponding transmission plate, the plug post is mounted on the clamping mounting seat, and the clamping plate is fixedly mounted at the middle position of the plug post.

[0014] The floating mechanism comprises a fixed seat, an adaptive floating group and a floating plate, wherein the fixed seat is mounted on the slide, the adaptive floating group is mounted on the fixed seat, the floating plate is mounted on the adaptive floating group, and the fixed platform is mounted on the floating plate.

[0015] The adaptive floating group includes a first guide rod, a spring and a floating block, the first guide rod is installed on a fixed seat, the spring is sleeved on the first guide rod, the floating block is sleeved on the first guide rod and connected to the spring, and the floating plate is installed on the floating block.

[0016] The fixing seat is provided with a second guide rod, and the floating plate is sleeved on the second guide rod.

[0017] The lifting mechanism includes a lifting seat, a supporting seat, a screw elevator and a lifting motor. The lifting seat is fixed on the slide, the screw elevator is installed on the lifting seat, the supporting seat is installed on the output end of the screw elevator, and the lifting motor is installed on the lifting seat and connected to the input end of the screw elevator.

[0018] The photographing mechanism comprises a fixed rod, a movable rod, a camera and a lifting cylinder. The fixed rod is fixedly mounted on a slide, the movable rod is hinged on the fixed rod, the lifting cylinder is installed on the fixed rod, and the output end of the lifting cylinder is hinged to one end of the movable rod, and the camera is fixedly mounted on the other end of the movable rod.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] The automatic centering tooling for the assembly and welding of ear hinges and chord tubes of the present invention, when assembling, first uses a photographing mechanism to respectively photograph and identify the center points of the ear hinge and the chord tube and feeds back to a PC end to calculate the position deviation to obtain the identification result, then the ear hinge is plugged into the positioning mechanism to complete the preliminary centering, the centering clamping mechanism and the jacking mechanism move to the corresponding position according to the identification result of the photographing mechanism, the centering clamping mechanism is retracted and inserted into a pair of ear holes of the ear hinge, and then cooperates with the positioning mechanism to realize the centering positioning of the ear hinge, the jacking mechanism drives the ear hinge to rotate around the hinge point, so that the center height of the ear hinge is adjusted to the required position, and finally the slide is used to move the ear hinge and the chord tube. If there is still some small docking error between the chord tube and the ear hinge, the centering clamping mechanism will produce a certain floating on the floating mechanism due to the external force during docking, thereby driving the ear hinge to adjust to the final position during docking. Compared with traditional manual docking, the centering tool uses a camera mechanism to take photos and identify the center points of the ear hinge and the chord tube, so that the centering clamping mechanism and the lifting mechanism can make corresponding position movement adjustments according to the recognition results of the camera mechanism, thus realizing the automation of centering; the positioning mechanism is inserted between a pair of ear plates of the ear hinge to achieve preliminary centering, and then cooperates with the center clamping mechanism and the lifting mechanism to achieve centering positioning, and finally realizes the final automatic centering positioning through the adaptive floating adjustment ability of the floating mechanism during docking. It improves the accuracy of centering positioning, reduces labor intensity, and improves welding quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a three-dimensional structural schematic diagram of a centering tool used for welding ear hinges and chord tube assemblies.

[0022] Figure 2 It is a three-dimensional structural schematic diagram (from another viewing angle) of the centering tooling used for welding the ear hinge and the chord tube assembly of the present invention.

[0023] Figure 3 The present invention is a schematic diagram of the main structure of the centering tool used for welding the ear hinge and the chord tube assembly.

[0024] Figure 4 The invention is a three-dimensional structural schematic diagram of a centering clamping mechanism in a centering tooling for welding ear hinges and chord tube assemblies.

[0025] Figure 5It is a three-dimensional structural schematic diagram (from another perspective) of the centering clamping mechanism in the centering tooling for welding the ear hinge and the chord tube assembly of the present invention.

[0026] Figure 6 The present invention is a schematic diagram of the main structure of a floating mechanism in a centering tool for welding an ear hinge and a chord tube assembly.

[0027] Figure 7 The present invention is a three-dimensional structural schematic diagram of a floating mechanism in a centering tool for welding ear hinges and chord tube assemblies.

[0028] The symbols in the figure represent:

[0029] 1. Base; 2. Slide; 3. Positioning mechanism; 31. Fixed plate; 32. T-shaped plug; 4. Floating mechanism; 41. Fixed seat; 411. Second guide rod; 42. Adaptive floating group; 421. First guide rod; 422. Spring; 423. Floating block; 43. Floating plate; 5. Centering clamping mechanism; 51. Fixed table; 511. Slide rail; 52. Clamping drive; 521. Clamping drive motor; 522. Transmission gear; 523. Transmission rack; 524. Transmission plate; 53. Clamping table; 531. Clamping mounting seat; 532. Plug column; 533. Clamping plate; 6. Lifting mechanism; 61. Lifting seat; 62. Supporting seat; 63. Screw lift; 64. Lifting motor; 7. Photographing mechanism; 71. Fixed rod; 72. Movable rod; 73. Camera; 74. Lifting cylinder; 8. Ear hinge. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Figures 1 to 7An embodiment of the automatic centering tooling for welding ear hinges and chord tube assemblies of the present invention is shown, comprising a base 1 and a slide 2, the slide 2 is slidably mounted on the base 1, the slide 2 is provided with a positioning mechanism 3 inserted between a pair of ear plates of the ear hinge 8, the slide 2 is provided with a floating mechanism 4, the floating mechanism 4 is provided with a centering clamping mechanism 5 inserted into a pair of ear holes of the ear hinge 8, the base 1 is provided with a lifting mechanism 6 for supporting the bottom of the ear hinge 8, the base 1 is provided with a photographing mechanism 7 for identifying the center positions of the ear hinge 8 and the chord tube, and the centering clamping mechanism 5 and the lifting mechanism 6 move to corresponding positions according to the identification results of the photographing mechanism 7. During assembly, the photographing mechanism 7 is first used to photograph and identify the center points of the ear hinge 8 and the string tube and feed back to the PC to calculate the position deviation to obtain the identification result. Then, the ear hinge 8 is plugged into the positioning mechanism 3 to complete the preliminary centering. The centering clamping mechanism 5 and the lifting mechanism 6 move to the corresponding position according to the identification result of the photographing mechanism 7. The centering clamping mechanism 5 is retracted and inserted into a pair of ear holes of the ear hinge 8, and then cooperates with the positioning mechanism 3 to realize the centering positioning of the ear hinge. The lifting mechanism 6 drives the ear hinge 8 to rotate around the hinge point to adjust the center height of the ear hinge 8 to the required position. Finally, the slide 2 is used to move the ear hinge 8 to dock with the string tube. If there is still some small docking error between the string tube and the ear hinge 8, the centering clamping mechanism 5 will produce a certain floating on the floating mechanism 4 due to the external force during docking, thereby driving the ear hinge 8 to adjust to the final position during docking. Compared with the traditional manual docking, the centering tool uses the camera mechanism 7 to take photos and identify the center points of the ear hinge 8 and the chord tube, so that the centering clamping mechanism 5 and the lifting mechanism 6 can make corresponding position movement adjustments according to the identification results of the camera mechanism 7, thus realizing the automation of centering; the positioning mechanism 3 is inserted between a pair of ear plates of the ear hinge 8 to realize preliminary centering, and then cooperates with the center clamping mechanism 5 and the lifting mechanism 6 to realize centering positioning, and finally realizes the final automatic centering positioning through the adaptive floating adjustment ability of the floating mechanism 4 during docking. It improves the accuracy of centering positioning, reduces labor intensity, and improves welding quality and welding efficiency.

[0032] In this embodiment, the positioning mechanism 3 includes a fixing plate 31 and a T-shaped plug 32. The fixing plate 31 is fixedly mounted on the slide 2. The T-shaped plug 32 is fixedly mounted on the fixing plate 31 and inserted between a pair of ear plates of the ear hinge 8. In this structure, the fixing plate 31 provides a mounting base for the T-shaped plug 32. The T-shaped plug 32 is inserted between a pair of ear plates of the ear hinge 8 to complete preliminary centering. The structure is simple and reliable.

[0033] In this embodiment, the centering clamping mechanism 5 includes a fixed platform 51, a clamping driving member 52 and a pair of clamping platforms 53. The fixed platform 51 is mounted on the floating mechanism 4, the clamping driving member 52 is mounted on the fixed platform 51, and the pair of clamping platforms 53 are mounted on the clamping driving member 52. The clamping driving member 52 drives the pair of clamping platforms 53 to be inserted into the pair of ear holes of the ear hinge 8 and clamp the ear hinge 8. In this structure, the clamping driving member 52 drives the pair of clamping platforms 53 to expand and retract on the fixed platform 51, thereby achieving the clamping of the ear hinge 8, and the structure is simple and ingenious.

[0034] In this embodiment, the clamping drive member 52 includes a clamping drive motor 521, a transmission gear 522, a pair of transmission racks 523 and a pair of transmission plates 524. The clamping drive motor 521 is fixedly mounted on the fixed platform 51, a pair of transmission plates 524 are slidably mounted on the fixed platform 51, and one of the transmission plates 524 is connected to the output end of the clamping drive motor 521, a pair of transmission racks 523 are respectively mounted on the corresponding transmission plates 524, the transmission gear 522 is fixedly mounted on the fixed platform 51 and meshes with the pair of transmission racks 523, and a pair of clamping platforms 53 are respectively mounted on the corresponding transmission plates 524. In this structure, the clamping drive motor 521 drives a transmission plate 524 to move, and the transmission plate 524 drives the transmission gear 522 to rotate through its transmission rack 523, and the transmission gear 522 drives the other transmission plate 524 to move through another transmission rack 523, thereby realizing the synchronous expansion and folding of the pair of transmission plates 524, which has a simple structure and ingenious design.

[0035] In this embodiment, a slide rail 511 is provided on the fixed platform 51, and a pair of transmission plates 524 are slidably mounted on the corresponding slide rails 511. The provision of the slide rails 511 ensures smoothness and stability during the movement of the pair of transmission plates 524.

[0036] In this embodiment, the clamping platform 53 includes a clamping mounting seat 531, a plug post 532 and a clamping plate 533. The clamping mounting seat 531 is fixed on the corresponding transmission plate 524, the plug post 532 is installed on the clamping mounting seat 531, and the clamping plate 533 is fixed at the middle position of the plug post 532. In this structure, the clamping mounting seat 531 provides a mounting base for the plug post 532. When clamping, the end of the plug post 532 is inserted into the reaming hole of the ear hinge 8, and the clamping plate 533 is then tightly attached to the ear plate of the ear hinge 8, thereby achieving positioning.

[0037] In this embodiment, the floating mechanism 4 includes a fixed seat 41, an adaptive floating group 42 and a floating plate 43. The fixed seat 41 is mounted on the slide 2, the adaptive floating group 42 is mounted on the fixed seat 41, the floating plate 43 is mounted on the adaptive floating group 42, and the fixed platform 51 is mounted on the floating plate 43. In this structure, the fixed seat 41 provides a mounting base for the adaptive floating group 42, and the floating plate 43 is mounted on the adaptive floating group 42. When subjected to external force, the floating plate 43 will realize adaptive floating adjustment through the adaptive floating group 42, thereby driving the floating adjustment of the fixed platform 51. The structure is simple and ingenious.

[0038] In this embodiment, the adaptive floating group 42 includes a first guide rod 421, a spring 422 and a floating block 423. The first guide rod 421 is mounted on the fixed seat 41, the spring 422 is sleeved on the first guide rod 421, the floating block 423 is sleeved on the first guide rod 421 and connected to the spring 422, and the floating plate 43 is mounted on the floating block 423. In this structure, there are a pair of first guide rods 421, each of which is provided with a spring 422 at both ends, and a floating block 423 is connected to the two springs 422 at the same end. When subjected to external force, the floating plate 43 can achieve left and right floating adjustment through the two floating blocks 423.

[0039] In this embodiment, the fixing seat 41 is provided with a second guide rod 411, and the floating plate 43 is sleeved on the second guide rod 411. By cooperating with the second guide rod 411, the smoothness and stability of the floating adjustment process are improved.

[0040] In this embodiment, the lifting mechanism 6 includes a lifting seat 61, a supporting seat 62, a screw lift 63 and a lifting motor 64. The lifting seat 61 is fixed on the slide 2, the screw lift 63 is installed on the lifting seat 61, the supporting seat 62 is installed on the output end of the screw lift 63, and the lifting motor 64 is installed on the lifting seat 61 and connected to the input end of the screw lift 63. In this structure, the supporting seat 62 provides an installation base for the supporting seat 62, the screw lift 63 and the lifting motor 64. The output end of the lifting motor 64 will drive the lifting seat 61 to rise and fall through the screw lift 63, and the lifting seat 61 will then drive the ear hinge 8 to rotate around the hinge point, so that the center height of the ear hinge 8 is adjusted to the desired position.

[0041] In this embodiment, the photographing mechanism 7 includes a fixed rod 71, a movable rod 72, a camera 73 and a lifting cylinder 74. The fixed rod 71 is fixedly mounted on the slide 2, the movable rod 72 is hinged on the fixed rod 71, the lifting cylinder 74 is installed on the fixed rod 71, and the output end of the lifting cylinder 74 is hinged to one end of the movable rod 72, and the camera 73 is fixed to the other end of the movable rod 72. In this structure, a lever structure is formed between the movable rod 72 and the fixed rod 71 by lifting and lowering the lifting cylinder 74, so that the camera 73 can be lowered after taking pictures without affecting the subsequent docking. The structure is simple and ingenious.

[0042] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. An automatic centering tool for welding ear hinges and chord tube assemblies, characterized in that: The invention comprises a base (1) and a slide (2), wherein the slide (2) is slidably mounted on the base (1), the slide (2) is provided with a positioning mechanism (3) inserted between a pair of ear plates of an ear hinge (8), the slide (2) is provided with a floating mechanism (4), the floating mechanism (4) is provided with a centering clamping mechanism (5) inserted into a pair of ear holes of the ear hinge (8), the base (1) is provided with a lifting mechanism (6) for supporting the bottom of the ear hinge (8), the base (1) is provided with a photographing mechanism (7) for identifying the center position of the ear hinge (8) and the string tube, and the centering clamping mechanism (5) and the lifting mechanism (6) move to corresponding positions according to the identification result of the photographing mechanism (7).

2. The automatic centering tool for welding ear hinges and chord tube assemblies according to claim 1, characterized in that: The positioning mechanism (3) comprises a fixing plate (31) and a T-shaped insert block (32), wherein the fixing plate (31) is fixedly mounted on the slide table (2), and the T-shaped insert block (32) is fixedly mounted on the fixing plate (31) and inserted between a pair of ear plates of the ear hinge (8).

3. The automatic centering tool for welding ear hinges and chord tube assemblies according to claim 2, characterized in that: The centering clamping mechanism (5) comprises a fixed platform (51), a clamping driving member (52) and a pair of clamping platforms (53); the fixed platform (51) is mounted on the floating mechanism (4); the clamping driving member (52) is mounted on the fixed platform (51); the pair of clamping platforms (53) are mounted on the clamping driving member (52); the clamping driving member (52) drives the pair of clamping platforms (53) to be inserted into a pair of ear holes of the ear hinge (8) and clamp the ear hinge (8).

4. The automatic centering tool for welding ear hinges and chord tube assemblies according to claim 3 is characterized in that: The clamping drive member (52) comprises a clamping drive motor (521), a transmission gear (522), a pair of transmission racks (523) and a pair of transmission plates (524); the clamping drive motor (521) is fixedly mounted on a fixed platform (51); a pair of transmission plates (524) are slidably mounted on the fixed platform (51), and one of the transmission plates (524) is connected to an output end of the clamping drive motor (521); a pair of transmission racks (523) are respectively mounted on corresponding transmission plates (524); the transmission gear (522) is fixedly mounted on the fixed platform (51) and meshes with the pair of transmission racks (523); and a pair of clamping platforms (53) are respectively mounted on corresponding transmission plates (524).

5. The automatic centering tool for welding ear hinges and chord tube assemblies according to claim 4, characterized in that: The fixed platform (51) is provided with a slide rail (511), and a pair of transmission plates (524) are slidably mounted on the corresponding slide rails (511).

6. The automatic centering tool for welding ear hinges and chord tube assemblies according to claim 5, characterized in that: The clamping platform (53) comprises a clamping mounting seat (531), an inserting column (532) and a clamping plate (533); the clamping mounting seat (531) is fixedly mounted on the corresponding transmission plate (524); the inserting column (532) is mounted on the clamping mounting seat (531); and the clamping plate (533) is fixedly mounted at a middle position of the inserting column (532).

7. The automatic centering tool for welding ear hinges and chord tube assemblies according to any one of claims 3 to 6, characterized in that: The floating mechanism (4) comprises a fixed seat (41), an adaptive floating group (42) and a floating plate (43); the fixed seat (41) is mounted on the slide table (2); the adaptive floating group (42) is mounted on the fixed seat (41); the floating plate (43) is mounted on the adaptive floating group (42); and the fixed table (51) is mounted on the floating plate (43).

8. The automatic centering tool for welding ear hinges and chord tube assemblies according to claim 7, characterized in that: The adaptive floating group (42) comprises a first guide rod (421), a spring (422) and a floating block (423); the first guide rod (421) is mounted on a fixed seat (41); the spring (422) is sleeved on the first guide rod (421); the floating block (423) is sleeved on the first guide rod (421) and connected to the spring (422); and the floating plate (43) is mounted on the floating block (423).

9. The automatic centering tool for welding ear hinges and chord tube assemblies according to claim 8, characterized in that: The fixing seat (41) is provided with a second guide rod (411), and the floating plate (43) is sleeved on the second guide rod (411).

10. The automatic centering tool for welding ear hinges and chord tube assemblies according to any one of claims 3 to 6, characterized in that: The lifting mechanism (6) comprises a lifting seat (61), a supporting seat (62), a screw lift (63) and a lifting motor (64); the lifting seat (61) is fixedly mounted on the slide (2); the screw lift (63) is mounted on the lifting seat (61); the supporting seat (62) is mounted on the output end of the screw lift (63); and the lifting motor (64) is mounted on the lifting seat (61) and connected to the input end of the screw lift (63).

11. The automatic centering tool for welding ear hinges and chord tube assemblies according to any one of claims 1 to 6, characterized in that: The photographing mechanism (7) comprises a fixed rod (71), a movable rod (72), a camera (73) and a lifting cylinder (74); the fixed rod (71) is fixedly mounted on the slide (2); the movable rod (72) is hinged on the fixed rod (71); the lifting cylinder (74) is installed on the fixed rod (71), and the output end of the lifting cylinder (74) is hinged to one end of the movable rod (72); and the camera (73) is fixedly mounted on the other end of the movable rod (72).

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