CN215316229U - Repairing device for surface abrasion of large wheel fixing table base - Google Patents

Abstract

The utility model discloses a repairing device for surface abrasion of a large wheel fixing table base, which comprises a welding robot, a structural member supporting platform, a heating device arranged on the structural member supporting platform, a manipulator base and a manipulator lifting adjusting device, wherein the welding robot is arranged on the structural member supporting platform; the manipulator lifting adjusting device is movably arranged on the manipulator base and can be lifted and adjusted on the manipulator base; the base of the welding robot is arranged on the manipulator lifting adjusting device. The utility model also discloses a repair process of the repair device based on the large wheel fixed table base surface abrasion and implementation, and through welding verification, the repair device can rapidly implement and complete the large wheel fixed table base abrasion welding repair, reduce the purchase cost, reduce the long-time process shutdown loss, and provide guarantee for reasonably generating various domestic and foreign wheels.

Description

Repairing device for surface abrasion of large wheel fixing table base

Technical Field

The utility model belongs to the technical field of welding, and relates to a welding repair device and a repair process for surface abrasion of a large wheel fixing table base.

Background

The technology limited company of the rail transit material of the horse steel is an important train wheel production base in China, is the biggest wheel production enterprise in Asia, is the only enterprise capable of producing the wheels of passenger cars with the speed grade of more than 120Km/h in China, and the research and development of heavy-duty wheels reach the international advanced level. At present, two wheel production lines are provided, and the annual production capacity is 80 ten thousands. The wheel two-line is a multi-variety rolling production line, and the wheel core rolling process flow is as follows: heating a steel blank, removing phosphorus on the whole surface, preforming 90MN wheels, clamping a movable manipulator, rolling by a rolling mill, clamping the movable manipulator, and positioning, molding and punching by 50 MN. 50MN positioning, forming and punching working principle: the hot wheel after being rolled by a rolling mill is placed on a grinding tool arranged on a wheel fixing table base, a punching core rod is fixedly connected above the rolling mill and fastened with a movable cross beam, the wheel is punched and formed by driving the rolling mill up and down, a die matched with punching and forming is arranged on the large wheel fixing table base, the large wheel fixing table base is arranged on a base surface of an oil press and bears rolling pressure and the weight of an equipment body, the surface of the die contacted with the large wheel fixing table base is abraded due to long-term unstable rolling of the oil press and abrasion of the base surface contacted with the bottom of the fixing table base, the mounting precision is influenced, the rolling size of the wheel is seriously influenced, if a new large wheel fixing table base is replaced, the cost of million spare parts is required, and the long period of processing of new spare parts is caused by no spare parts, so that the production is influenced. In order to recover production as soon as possible, a simple repair device needs to be designed, wear surface overlaying and heat treatment processes based on different base metals are formulated and perfected, a large wheel fixed station base wear welding repair strategy is developed, and the worn large wheel fixed station base can be repeatedly used economically, safely and reliably. In addition, the main difficulty of the abrasion welding repair of the large wheel fixed station base is as follows: after the welding processes such as machining and cleaning of the abrasion part of the base of the fixed platform to be treated, integral preheating, 180-degree turnover two-side welding, integral heating and heat preservation and the like are completed, the base of the integral fixed platform is ensured not to be structurally deformed, the installation of various rolling dies and various substandard performances of internal tissues are not influenced, the base of the fixed platform after welding repair meets the requirements of placing of various rolling dies and deformation of components when red steel is rolled for expansion with heat and contraction with cold, the surface cannot have any welding defects, and the subsequent influence on the service cycle quality of the base of the large wheel fixed platform is avoided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device and a process for repairing the surface abrasion of a large wheel fixing table base, aiming at the characteristic of weldability of the surface abrasion of the large wheel fixing table base in the background technology.

The technical scheme for solving the technical problem of the utility model is as follows:

the utility model relates to a repairing device for surface abrasion of a large wheel fixing table base, which comprises a welding robot, a structural member supporting platform, a manipulator base, a manipulator lifting adjusting device and a heating device arranged on the structural member supporting platform, wherein the welding robot is arranged on the structural member supporting platform; the manipulator base is arranged on one side of the structural member supporting platform; the manipulator lifting adjusting device is movably arranged on the manipulator base and can be lifted and adjusted on the manipulator base; the base of the welding robot is arranged on the manipulator lifting adjusting device.

Further, the manipulator base comprises a base plate and a plurality of bottom steel pipes which are uniformly arranged on the upper surface of the base plate.

Furthermore, the structural member supporting platform comprises a supporting platform body and a plurality of support legs fixedly arranged at the bottom of the supporting platform body, and a plurality of triangular reinforcing steel plates are uniformly welded between each support leg and the bottom of the supporting platform body; the heating device is arranged on the supporting platform body.

Furthermore, a plurality of fixed support rods are uniformly arranged on the support platform body; the heating device is arranged between the fixed support rods and comprises an electric heating belt, and upper asbestos and lower asbestos which are respectively arranged at the top and the bottom of the electric heating belt.

Further, the manipulator lifting adjusting device comprises a manipulator lifting adjusting device base, and the base of the welding robot is fixedly connected with the manipulator lifting adjusting device base through bolts; the bottom of the manipulator lifting adjusting device base is provided with a plurality of top steel pipes which correspond to the bottom steel pipes one by one, and the bottom of each top steel pipe is inserted into the top of the corresponding bottom steel pipe; a first T-shaped table is arranged at the center of the bottom of the manipulator lifting adjusting device base, and a fixed screw device is rotatably arranged on the first T-shaped table; an adjusting steel pipe is arranged at the center of the base plate, and the top of the adjusting steel pipe is provided with internal threads and is in threaded connection with an adjusting screw rod; and a second T-shaped table is arranged at the top end of the adjusting screw rod and is rotationally connected with the fixing screw rod device.

Furthermore, the fixed screw device comprises two bearing bush sleeves which are symmetrically detachably connected, and the inner side of each bearing bush sleeve is respectively matched with the first T-shaped table or the second T-shaped table.

Based on above-mentioned technical scheme a prosthetic devices's of fixed platform base surface wear repair technology place cuboid form fixed platform base level on fixed stay bar, be connected welding robot's base and manipulator lift adjusting device and according to the height-adjusting of fixed platform base, then preheat the back through heating device to the fixed platform base, implement the welding, this welding process is as follows:

step one, preparing before welding;

1.1), welding equipment: the welding robot adopts a six-axis robot; the Nb-500P digital pulse gas shielded welding machine is in direct current positive connection, a 3Cr13 welding wire is selected as a welding material, and the purity of carbon dioxide gas is more than or equal to 99.8%; HT400D digital control inversion type manual direct current argon arc welding machine, wherein a 3Cr13 welding wire is selected as a welding material, and the argon purity is more than or equal to 99.99 percent;

1.2), oil stain, an oxide layer, moisture and the like cannot be generated in a welding position area and a welding wire, metal luster needs to be exposed, oxyacetylene flame is used for removing the moisture and the oil in the welding position area, and then, abrasive cloth or a grinding wheel machine is used for polishing and derusting;

1.3), welding technical requirements: the overlaying layer fuses base materials, and a welding seam cannot have any welding defects;

1.4), material: z35 #;

1.5), auxiliary facilities: the device comprises a heat-insulating barrel, a sample plate, a temperature measuring instrument, a magnifier, a mask, gloves, a slag removing hammer, a chisel, a file, a steel brush, abrasive paper, a steel ruler, a horizontal ruler, a movable spanner, a straight grinder, an angle grinder, a wire pliers, a steel saw blade and labor protection articles;

1.6), determining welding parameters according to welding equipment, welding wire specifications and welding requirements;

step two, welding and repairing;

because the fixed table base is thick and the surface of the fixed table base needs to be completely built up, the fixed table base is uniformly preheated by the heating device and reaches the preheating temperature; clamping an Nb-500P digital pulse gas shielded welding gun by a welding robot to weld the bottom layer on the front surface of the fixed table base, setting the welding robot to carry out external-internal surfacing welding symmetrically on two sides of linear walking according to the shape of the fixed table base during welding, and adopting the same welding material to weld and repair through an HT400D digital control inversion type manual direct current argon arc welding machine for the welding size which cannot be met by the welding robot at the corner of the fixed table base; after the front bottom layer of the fixed table base is welded and no welding defect is confirmed, turning the whole fixed table base for 180 degrees, performing integral surfacing repair on the back bottom layer and the second layer by adopting the same method as the front welding, and confirming no welding defect by visual inspection and a 5-time magnifier after the welding is finished; then, after the whole fixed table base is turned over by 180 degrees, the second layer, the third layer and the cover surface layer on the front surface are subjected to surfacing by the same welding method, the welding deformation is strictly controlled during welding, and finally, the surfacing layer on the whole surface is left with machining allowance; after welding is finished, cooling the base of the fixed platform to room temperature, carrying out all-dimensional flaw detection by a detection instrument, and taking away a welding gun clamped by a welding robot after confirming that no welding defect exists; starting the heating device to uniformly heat the base of the fixed table to 650-800 ℃ at a speed of 50 ℃/h, slowly cooling to 300 ℃ after keeping the temperature for 2 hours, and then slowly cooling to room temperature by wrapping with asbestos; and finally, machining the welded integral fixed table base by adopting mechanical grinding to meet the use size, and delivering for use after the welding is qualified.

Further, when the welding robot clamps the Nb-500P digital pulse gas shielded welding gun for surfacing, a 3Cr13 welding wire with the diameter of 1.2mm is selected, the welding current is 230-280A, the arc voltage is 25-30V, and the deposition speed is 90-140 g/min; when the welding repair is carried out by the HT400D digital control inversion type manual direct current argon arc welding machine, a 3Cr13 welding wire with the diameter of 2.5mm is selected, the welding current is 90-130A, the arc voltage is 17 +/-1V, and the welding speed is 5 +/-1 cm/min.

Furthermore, the preheating temperature before welding is set to be 200-250 ℃, and the temperature rises uniformly at the speed of 30 ℃/h.

Further, in the welding process, the interlayer temperature is controlled to be not lower than 200 ℃; in the welding process, if a surfacing layer has welding defects, a manual angle grinder is adopted for back chipping and welding repair.

Compared with the prior art, the repair device and the repair process for the surface abrasion of the large wheel fixing table base are safe and easy to operate, stable in welding quality, low in investment cost, capable of meeting the actual field requirements, high in working efficiency, capable of greatly reducing the maintenance cost, capable of reducing long-time process shutdown loss and capable of guaranteeing the reasonable group production of various domestic and foreign wheels.

Drawings

FIG. 1 is a schematic structural diagram of a device for repairing the surface wear of a base of a large wheel fixing table according to the present invention;

FIG. 2 is an exploded view of the structural member support platform, heating device and mounting base of the present invention;

FIG. 3 is an exploded view of the manipulator base, the carrier hand lift adjustment device base and the welding robot of the present invention;

in the figure: 1. a fixed table base; 2. a structural member support platform; 21. a support platform body; 22. a support leg; fixing the support rod; 24. reinforcing a fixed steel plate in a triangular mode; 3. a heating device; 31. an electrical heating belt; 32. an upper asbestos; 33. a lower asbestos; 4. a manipulator base; 41. a base plate; 42. a bottom steel pipe; 5. a manipulator lifting adjusting device; 51. a manipulator lifting adjusting device base; 52. a top steel pipe; 53. a first T-shaped table; 54. adjusting the steel pipe; 55. adjusting the screw rod; 56. a second T-shaped table; 57. a screw device is fixed; 6. a welding robot.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "upper", "lower", "left", "right", "front", "rear", and the like used in the specification and claims of the present disclosure are used only to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationships are changed accordingly; the terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Example 1:

as shown in fig. 1 to 3, the repairing device for surface wear of a large wheel fixing table base comprises a welding robot 6, a structural member supporting platform 2, a manipulator base 4, a manipulator lifting adjusting device 5 and a heating device 3 arranged on the structural member supporting platform 2; the manipulator base 4 is arranged on one side of the structural part supporting platform 2; the manipulator lifting adjusting device 5 is movably arranged on the manipulator base 4 and can be used for lifting adjustment on the manipulator base 4 so as to meet the welding requirement of a subsequently installed welding robot 6; the base of the welding robot 6 is arranged on the manipulator lifting adjusting device 5.

In this embodiment, the manipulator base 4 includes a base plate 41 and a plurality of bottom steel pipes 42 evenly welded to the upper surface of the base plate 41, the base plate 41 is formed by machining a 50mm steel plate according to a designed diameter, and is circularly connected and fixed to a base surface, and the bottom steel pipes 42 are made of phi 60mm steel pipes.

In this embodiment, the structural member supporting platform 2 includes a supporting platform body 21 and a plurality of support legs 22 fixedly disposed at the bottom of the supporting platform body 21, and a plurality of triangular reinforcing steel plates 24 are uniformly welded between each support leg 22 and the bottom of the supporting platform body 21; the heating device 3 is arranged on the support platform body 21. In this example, the supporting platform body 21 is made of 50mm steel plate by cutting, the supporting legs 22 are made of 100mm square steel, and the triangular reinforcing steel plate 24 is made of 30mm thick steel plate by cutting.

Further, in this embodiment, a plurality of fixed support rods 23 made of round bars with a diameter of 80mm are uniformly arranged on the support platform body 21, and the height and width of each fixed support rod 23 are greater than the placement position of the electric heater 3; the heating device 3 is disposed between the fixed support rods 23, and includes an electric heating belt 31, and upper and lower asbestos sheets 32 and 33 respectively disposed on the top and bottom of the electric heating belt 31.

In this embodiment, the manipulator lifting adjusting device 5 includes a circular manipulator lifting adjusting device base 51 formed by machining a 30mm steel plate according to a designed diameter, and the base of the welding robot 6 is fixed to the manipulator lifting adjusting device base 51 through bolts; the bottom of the manipulator lifting adjusting device base 51 is provided with a plurality of top steel pipes 52 which are made of phi 50mm steel pipes and correspond to the bottom steel pipes 42 one by one, and the bottom of each top steel pipe 52 is inserted into the top of the corresponding bottom steel pipe 42; a first T-shaped table 53 is arranged at the center of the bottom of the manipulator lifting adjusting device base 51, and a fixed screw device 57 is rotatably arranged on the first T-shaped table 53; an adjusting steel pipe 54 made of a steel pipe with the diameter of 60mm is arranged at the center of the base plate 41, and the top of the adjusting steel pipe 54 is provided with internal threads and is in threaded connection with an adjusting screw 55; the top end of the adjusting screw 55 is provided with a second T-shaped table 56, and the second T-shaped table 56 is rotatably connected with a fixed screw device 57. Further, the fixing screw device 57 includes two bearing sleeves which are symmetrically detachably connected, and the inner side of each bearing sleeve is respectively matched with the first T-shaped table 53 or the second T-shaped table 56.

Example 2:

based on embodiment 1 a prosthetic devices's of large-scale wheel fixed station base surface wear repair technology for fixed station base 1's welding is restoreed, places the cuboid form fixed station base 1 level that the bottom surface is the square on fixed support rod 23, is connected welding robot 6's base and manipulator lift adjusting device 5 and adjusts the height according to fixed station base 1's welding requirement, then preheats back to fixed station base 1 through heating device 3, implements the welding, this welding process as follows:

step one, preparing before welding;

1.1, welding equipment: the welding robot 6 adopts a loose six-axis robot; the Nb-500P digital pulse gas shielded welding machine is in direct current positive connection, 3Cr13 welding wires with the diameter of 1.2mm are selected as welding materials, and the purity of carbon dioxide gas is more than or equal to 99.8 percent; HT400D digital control inversion type manual direct current argon arc welding machine, wherein a 3Cr13 welding wire with the diameter of 2.5mm is selected as a welding material, and the argon purity is more than or equal to 99.99 percent;

1.2, oil stain, an oxide layer, moisture and the like cannot be generated in a welding position area and a welding wire, metal luster needs to be exposed, oxyacetylene flame is used for removing the moisture and the oil in the welding position area, and then, the abrasive cloth or a grinding wheel machine is used for polishing and derusting;

1.3, welding technical requirements: the overlaying layer fuses base materials, and a welding seam cannot have any welding defects;

1.4, material quality: z35 #;

1.5, auxiliary facilities: a heat-insulating barrel, a sample plate, a temperature measuring instrument, a magnifier, a mask, gloves, a slag removing hammer, a chisel, a file, a steel brush, abrasive paper, a steel ruler, a level bar, a movable spanner, a straight grinder, an angle grinder, a wire pliers, a steel saw blade, and labor protection articles (work clothes, shoes, caps and planoscopes);

1.6, determining welding parameters according to welding equipment, welding wire specifications and welding requirements;

manual tungsten electrode argon arc welding

Carbon dioxide arc welding

Step two, welding and repairing;

because the fixed table base 1 is thicker and the surface of the fixed table base needs to be completely built up, the fixed table base 1 is uniformly preheated by the heating device 3 to reach the preheating temperature of 200-250 ℃, during preheating, the temperature is uniformly transferred from bottom to top, the uniform temperature rising speed is required to be 30 ℃/h, so that the non-uniform high-temperature heating is avoided, microcracks are generated inside the whole fixed table base 1, and the preheating is the integral heating of the fixed table base 1, so that the local temperature difference stress can be reduced, the internal structure is improved, and the hardening structure is prevented or reduced; then clamping an Nb-500P digital pulse gas shielded welding gun by the welding robot 6 to weld the bottom layer on the front surface of the fixed table base 1, and setting the welding robot 6 to be in linear walking and two-side symmetrical outside-inside surfacing according to the shape of the fixed table base 1 during welding; for the welding dimension which can not be met by the welding robot 6 at the corner of the fixed table base 1, the same welding material is adopted to carry out weld repair by an HT400D digital control inversion type manual direct current argon arc welding machine (manual tungsten electrode argon arc welding); after the front bottom layer of the fixed table base 1 is welded and no welding defect is confirmed, turning the whole fixed table base 1 by 180 degrees, performing integral surfacing repair on the back bottom layer and the second layer by the same method as the front welding, and confirming no welding defect by visual inspection and a 5-time magnifier after the welding is finished; then, after the fixed table base 1 is integrally turned over by 180 degrees, surfacing of the second layer, the third layer and the cover surface layer on the front surface is carried out by the same welding method, the welding deformation is strictly controlled during welding, and finally, the surfacing layer on the integral surface is left with machining allowance; after welding, cooling the fixed table base 1 to room temperature, carrying out all-dimensional flaw detection by a detection instrument, and taking away a welding gun clamped by the welding robot 6 after confirming that no welding defect exists; starting the heating device 3, uniformly heating the fixed table base 1 to 650-800 ℃ at a speed of 50 ℃/h, slowly cooling to 300 ℃ after keeping the temperature for 2 hours, and then slowly cooling to room temperature by using asbestos wrapping; and finally, machining the welded integral fixed table base 1 to meet the use size by adopting mechanical grinding, and delivering for use after the welding is qualified.

In the embodiment, in the welding process, the interlayer temperature is controlled to be not lower than 200 ℃, and if welding defects exist in the overlaying layer, a manual angle grinder is used for back chipping and weld repair.

The method successfully carries out welding repair on the fixed table bases of the 60MN hydraulic machine, the 50MN hydraulic machine and the 31.5MN hydraulic machine of the wheel rolling mill made of certain steel, and meets the standard requirement through quality inspection and acceptance.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (6)

1. A repairing device for surface abrasion of a large wheel fixing table base comprises a welding robot (6), and is characterized by further comprising a structural member supporting platform (2), a manipulator base (4), a manipulator lifting adjusting device (5) and a heating device (3) arranged on the structural member supporting platform (2); the manipulator base (4) is arranged on one side of the structural part supporting platform (2); the manipulator lifting adjusting device (5) is movably arranged on the manipulator base (4) and can be lifted and adjusted on the manipulator base (4); and the base of the welding robot (6) is arranged on the manipulator lifting adjusting device (5).

2. The device for repairing the surface abrasion of the large wheel fixing table base according to claim 1, wherein the manipulator base (4) comprises a base plate (41) and a plurality of bottom steel pipes (42) uniformly arranged on the upper surface of the base plate (41).

3. The device for repairing the surface abrasion of the base of the large wheel fixing table according to claim 2, wherein the structural member supporting platform (2) comprises a supporting platform body (21) and a plurality of support legs (22) fixedly arranged at the bottom of the supporting platform body (21), and a plurality of triangular reinforcing steel plates (24) are uniformly welded between each support leg (22) and the bottom of the supporting platform body (21); the heating device (3) is arranged on the supporting platform body (21).

4. The device for repairing the surface abrasion of the base of the large wheel fixing table according to claim 3, wherein a plurality of fixing support rods (23) are uniformly arranged on the support platform body (21); the heating device (3) is arranged between the fixed support rods (23) and comprises an electric heating belt (31) and upper asbestos (32) and lower asbestos (33) which are respectively arranged at the top and the bottom of the electric heating belt (31).

5. The device for repairing the surface abrasion of the base of the large wheel fixing table according to claim 4, wherein the manipulator lifting adjusting device (5) comprises a manipulator lifting adjusting device base (51), and the base of the welding robot (6) is fixedly connected with the manipulator lifting adjusting device base (51) through bolts; the bottom of the manipulator lifting adjusting device base (51) is provided with a plurality of top steel pipes (52) which are in one-to-one correspondence with the bottom steel pipes (42), and the bottom of each top steel pipe (52) is respectively inserted into the top of the corresponding bottom steel pipe (42); a first T-shaped table (53) is arranged at the center of the bottom of the manipulator lifting adjusting device base (51), and a fixed screw device (57) is rotatably arranged on the first T-shaped table (53); an adjusting steel pipe (54) is arranged at the center of the base plate (41), and the top of the adjusting steel pipe (54) is provided with internal threads and is in threaded connection with an adjusting screw rod (55); the top end of the adjusting screw rod (55) is provided with a second T-shaped table (56), and the second T-shaped table (56) is rotatably connected with a fixed screw rod device (57).

6. A large wheel fixed station base surface abrasion prosthetic devices according to claim 5, characterized in that, the said set screw device (57) includes two axle bush sleeves which are symmetrically and detachably connected, the inner side of each axle bush sleeve is respectively adapted with the first T-shaped platform (53) or the second T-shaped platform (56).

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