Bridge steel structure welding device

Abstract

The invention relates to the technical field of welding, in particular to a bridge steel structure welding device which comprises a fixing unit, a welding unit and a control unit, and the welding unit comprises a welding gun and a manipulator; the control unit comprises a data collection module and a data processing module. According to the method, when the distance between the upper end or the lower end of the anchoring part and the surface of the profile steel is large, the intensity of the current is increased, the thermal compensation input of the current is increased, and therefore the width of a molten pool is increased, and incomplete penetration is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular to a welding device for a bridge steel structure. Background Art

[0002] A bridge expansion joint is a type of steel structure. It consists of a steel section and anchors, which are welded to the steel section at right angles. In practice, the expansion joint can expand and contract freely in both directions parallel and perpendicular to the bridge axis.

[0003] Bridge expansion joints require welding equipment during manufacturing. Chinese patent application number 202510006343.7 discloses a bridge expansion joint welding fixture with a limiting mechanism, comprising a welding seat, a processing seat fixed on the surface of the welding seat, and bridge expansion joint steel sections abutting on both sides of the processing seat surface. The surface of the welding seat is mounted with a limiting component. The device is provided with a limiting component, which can effectively limit the position of the bridge expansion joint steel section, ensuring that the bridge expansion joint steel section remains stable during the welding process, which is beneficial to improving welding quality, reducing welding defects caused by position deviation of the bridge expansion joint steel section, and reducing collisions or damage caused by displacement of the bridge expansion joint steel section. At the same time, the downward pressure of the bridge expansion joint steel section at the four corners is limited, which can apply limiting force to the bridge expansion joint steel section from multiple directions, thereby enhancing the overall limiting effect, so that the steel section can better resist external force interference during welding, and ensure smooth welding.

[0004] However, in actual welding, the surface of the bridge expansion joint steel section may be tilted, resulting in an error in the distance between the lower end of the anchor and the surface of the steel section. If the welding current is not adjusted, incomplete welding may occur.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the Invention

[0006] The purpose of the present invention is to provide a bridge steel structure welding device that can effectively solve the above technical problems.

[0007] In order to achieve the purpose of the present invention, the following technical solutions are adopted: A bridge steel structure welding device includes: a fixing unit, a welding unit, and a control unit, wherein the welding unit includes a welding gun and a manipulator; the control unit includes a data collection module and a data processing module; The data collection module collects the degree of inclination at two points at the same vertical position on the surface of the steel section and transmits this information to the data processing module. The data processing module performs data analysis and calculates the verticality of the steel section; the data processing module calculates the distance between the upper end and the lower end of the anchor and the surface of the steel section, and generates a welding current based on this distance.

[0008] Furthermore, the specific steps of generating the welding current based on the distance between the upper end of the anchor and the lower end of the anchor and the surface of the steel section are as follows: Step S1: Detecting a first distance a between a first position and the surface of the profiled steel, moving a distance b in the vertical direction to reach a second position, and then detecting a first distance c between the second position and the surface of the profiled steel; Step S2: Calculate the tilt angle n, .

[0009] Step S3: adjusting the current according to the preset value.

[0010] Furthermore: the fixing unit includes: a rotating body, a connecting member fixedly mounted on the rotating body, a pressing member hinged on the connecting member, and a contact member that enables the pressing member to contact the steel structure.

[0011] Further: the pressing member is composed of an abutting portion and a pressing member, the abutting portion is hinged to the pressing member, the pressing member is hinged to the connecting member, a push block is abutted below the abutting portion of the pressing member, a push rod is fixedly connected to the push block, and the push block and the abutting portion are connected by an inclined surface.

[0012] Furthermore: it also includes an oil injection mechanism; the oil injection mechanism includes: an oil receiving box, a filter assembly, an oil inlet pipe connecting the oil receiving box and the filter assembly, and an oil injection pipe.

[0013] Furthermore: the filter assembly includes: a cylinder, a first piston plate that moves in the cylinder, and an oil filling filter that is fixedly installed inside the cylinder.

[0014] Furthermore: the oil filling filter consists of an annular portion and a plate, a first filter can be installed on the plate, the annular portion and the first piston plate are connected by a rubber ring; the oil filling pipe is fixedly connected to the annular portion.

[0015] Furthermore: a second piston plate is slidingly provided inside the cylinder, a second filter is installed on the second piston plate, and the first piston plate and the second piston plate are connected by a connecting rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The bridge steel structure welding device of the present invention increases the current intensity and the thermal compensation input of the current when the distance between the upper end or the lower end of the anchor and the surface of the steel section is large, thereby increasing the width of the molten pool and preventing incomplete welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0018] Figure 1 This is a flow chart of generating welding current for the bridge steel structure welding device of the present invention.

[0019] Figure 2 This is a schematic diagram of the welding unit of the bridge steel structure welding device of the present invention.

[0020] Figure 3 This is a schematic diagram of the fixing unit of the bridge steel structure welding device of the present invention.

[0021] Figure 4 for Figure 3 Enlarged schematic diagram of part A.

[0022] Figure 5 It is a schematic diagram of the rotating body of the bridge steel structure welding device of the present invention.

[0023] Figure 6 This is a schematic diagram of the filter assembly of the bridge steel structure welding device of the present invention.

[0024] Figure 7 This is a cross-sectional view of the cylinder of the bridge steel structure welding device of the present invention.

[0025] Figure 8 This is a schematic diagram from another angle of the cylinder of the bridge steel structure welding device of the present invention.

[0026] In the figure: 100, fixed unit; 101, rotating body; 102, connecting member; 103, pressing member; 104, contact member; 105, abutting portion; 106, pressing portion; 107, push rod; 108, gear portion; 109, smooth portion; 110, rotating gear; 111, power motor; 112, supporting wheel; 113, housing; 114, oil receiving box; 115, filter assembly; 116, oil inlet pipe; 117, oil injection pipe; 118, cylinder; 119, first piston plate; 120, oil filling filter; 121, annular portion; 122, plate; 123, rubber ring; 124, second piston plate; 125, connecting rod; 200, welding unit; 201, welding gun; 202, manipulator. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0028] It should be understood that, although the various steps in the flow chart of each embodiment of the present invention are shown in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless otherwise specified herein, the execution of these steps is not strictly limited in order, and these steps can be performed in other orders. Moreover, at least a portion of the steps in each embodiment may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these sub-steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0029] like Figures 1 to 8 As shown, the bridge steel structure welding device of the present invention includes: a fixing unit 100, a welding unit 200, and a control unit.

[0030] The welding unit 200 includes a welding gun 201 and a robot 202 . The welding gun 201 is mounted on the robot 202 , and the robot 202 drives the welding gun 201 to move.

[0031] The control unit includes a data collection module and a data processing module.

[0032] In one embodiment, the data collection module collects the pressure value between the two steel sections and sends it to the data processing module. When the pressure value is greater than a first preset threshold, the data processing module issues instruction one.

[0033] In one embodiment, the data collection module collects the degree of inclination at two points at the same vertical position on the surface of the steel section and transmits this information to the data processing module. The data processing module performs data analysis and calculates the verticality of the steel section; the data processing module calculates the distance between the upper end and the lower end of the anchor and the surface of the steel section, and generates a welding current based on this distance.

[0034] Welding current is a critical parameter during welding. Because the distance between the upper and lower ends of the anchors and the profile surface is relatively fixed and small, single-layer welding is generally used. If the wire diameter and welding current remain constant, incomplete penetration may occur at larger distances, resulting in an unstable weld. Therefore, when the distance between the upper and lower ends of the anchors and the profile surface is large, that is, when the angle of inclination is large, the current intensity should be increased to increase the thermal compensation input, thereby widening the weld pool and preventing incomplete penetration.

[0035] The specific steps of generating welding current based on the distance between the upper end of the anchor and the lower end of the anchor and the surface of the steel section are as follows: Step S1: The data collection module is a laser rangefinder, which first detects a first distance a between a first position and the surface of the steel section, moves a distance b in the vertical direction to a second position, and then detects a first distance c between the second position and the surface of the steel section; Step S2: Calculate the tilt angle n, .

[0036] Step S3: adjusting the current according to the tilt angle.

[0037] It should be noted here that a comparison table of welding angles and currents is set manually based on experience and inspection of finished products after welding. When the welding angle is detected, the data processing module automatically matches the current.

[0038] The fixing unit 100 includes a rotating body 101, a connecting member 102 fixedly mounted on the rotating body 101, a pressing member 103 hingedly connected to the connecting member 102, and a contact member 104 for contacting the pressing member 103 with the steel structure. Two rotating bodies 101 are provided, and the connecting member 102 is used to connect the two rotating bodies 101. The pressing member 103 is composed of an abutting portion 105 and a pressing portion 106. The abutting portion 105 is hingedly connected to the pressing portion 106, and the pressing portion 106 is hingedly connected to the connecting member 102.

[0039] During actual use, the abutting portion 105 moves upward, exerting force on one end of the pressing portion 106 , thereby causing the other end of the pressing portion 106 to move downward, pressing the steel structure.

[0040] In one embodiment, a pressure sensor is installed on the pressing portion 106 , and the pressure sensor can measure the pressure between the pressing portion 106 and the steel structure.

[0041] The contact member 104 is a push block, and a push rod 107 is fixedly connected to the push block. The push block and the abutment portion 105 are connected via an inclined surface. When the push rod 107 drives the push block to move, the abutment portion 105 can move upward.

[0042] The first instruction is: the power component connected to the push rod 107 stops running, and the power component can be a cylinder.

[0043] The rotating body 101 is composed of a gear part 108 and a smooth part 109. The gear part 108 is engaged with a rotating gear 110 that drives it to rotate actively. The rotating gear 110 is connected to a power motor 111 that drives it to rotate actively. Therefore, the power motor 111 can drive the rotating body 101 to rotate during the rotation process.

[0044] Two supporting wheels 112 are in contact with the smooth portion 109 and are located on both sides of the smooth portion 109 , mainly serving to support the rotating body 101 .

[0045] As a further improvement of the present invention, the rotating body 101 is externally covered with a housing 113, and a pressing wheel is rotatably mounted above the interior of the housing 113, and the pressing wheel abuts against the smooth portion 109. Pressure is applied to the rotating body 101 from above, so that the rotating body 101 can rotate stably.

[0046] Since it is used in a welding environment, the gear portion 108 and the power gear will be contaminated with welding smoke, causing wear and reducing the service life. Therefore, it is necessary to use an oil spraying mechanism to spray oil on the gear portion 108 and the power gear to flush out the welding smoke, and the oil also needs to be filtered to reduce the cost of use.

[0047] The oil injection mechanism includes an oil receiving box 114 , a filter assembly 115 , an oil inlet pipe 116 connecting the oil receiving box 114 and the filter assembly 115 , and an oil injection pipe 117 for spraying oil toward the gear portion 108 and the power gear.

[0048] Gear pumps can be installed on the oil inlet pipe 116 and the oil injection pipe 117 as needed, so as to achieve the effect of accelerating the flow of oil.

[0049] It should be noted here that the main purpose of the oil in this application is to flush solids such as welding smoke on the gear part 108 and the power gear, so a low-cost cutting fluid can be used.

[0050] The filter assembly 115 includes: a cylinder 118, a first piston plate 119 that moves inside the cylinder 118, and an oil filling filter 120 fixedly installed inside the cylinder 118; the oil filling filter 120 is composed of an annular portion 121 and a plate 122, and a first filter screen can be installed on the plate 122. The annular portion 121 and the first piston plate 119 are connected by a rubber ring 123; the oil filling pipe is fixedly connected to the annular portion 121, and the oil flows into the space between the first piston plate 119 and the plate 122. At this time, the first piston plate 119 can move back and forth, thereby driving the flow of oil, so that the oil passes through the first filter screen to perform initial filtration on the oil.

[0051] A second piston plate 124 is slidingly provided inside the cylinder 118, and a second filter is installed on the second piston plate 124. The first piston plate 119 and the second piston plate 124 are connected by a connecting rod 125, so that when the first piston plate 119 moves, it can drive the second piston plate 124 to move, and then the second filter moves to fully filter the oil.

[0052] That is to say, during the movement of the first piston plate 119 of the present application, the rubber ring 123 can be driven to deform, thereby squeezing the oil, so that the oil is filtered through the first filter screen. Moreover, when the first piston plate 119 moves, the second piston plate 124 can be driven to move, thereby moving the second filter screen, fully filtering the oil, and then performing secondary filtration, with a good filtering effect.

[0053] In the present application, the first piston plate 119 can be driven by a cylinder or by a motor, which is common knowledge and will not be elaborated in this application.

[0054] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a non-volatile computer-readable storage medium. When executed, the program can include the processes of the above-described method embodiments. Any reference to memory, storage, database, or other media used in the various embodiments provided herein may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAMbus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM).

[0055] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A bridge steel structure welding device, characterized by: include: A fixing unit, a welding unit, and a control unit, wherein the welding unit includes a welding gun and a manipulator; the control unit includes a data collection module and a data processing module; The data collection module collects the degree of inclination at two points at the same vertical position on the surface of the steel section and transmits this information to the data processing module. The data processing module performs data analysis and calculates the verticality of the steel section; the data processing module calculates the distance between the upper end and the lower end of the anchor and the surface of the steel section, and generates a welding current based on this distance.

2. The bridge steel structure welding device according to claim 1, characterized in that: The specific steps of generating welding current based on the distance between the upper end of the anchor and the lower end of the anchor and the surface of the steel section are as follows: Step S1: Detecting a first distance a between a first position and the surface of the profiled steel, moving a distance b in the vertical direction to reach a second position, and then detecting a first distance c between the second position and the surface of the profiled steel; Step S2: Calculate the tilt angle n, ; Step S3: adjusting the current according to the preset value.

3. The bridge steel structure welding device according to claim 2, characterized in that: The fixing unit includes: a rotating body, a connecting member fixedly mounted on the rotating body, a pressing member hinged on the connecting member, and a contact member for making the pressing member contact with the steel structure.

4. The bridge steel structure welding device according to claim 3, characterized in that: The pressing member is composed of an abutting portion and a pressing member, the abutting portion is hinged to the pressing member, the pressing member is hinged to the connecting member, a push block is abutted below the abutting portion of the pressing member, a push rod is fixedly connected to the push block, and the push block and the abutting portion are connected by an inclined surface.

5. The bridge steel structure welding device according to claim 1 or 3, characterized in that: It also includes an oil injection mechanism; the oil injection mechanism includes: an oil receiving box, a filter assembly, an oil inlet pipe connecting the oil receiving box and the filter assembly, and an oil injection pipe.

6. The bridge steel structure welding device according to claim 5, characterized in that: The filter assembly includes: a cylinder, a first piston plate moving in the cylinder, and an oil filling filter fixedly installed inside the cylinder.

7. The bridge steel structure welding device according to claim 6, characterized in that: The oil filling filter consists of an annular portion and a plate. The first filter screen can be installed on the plate. The annular portion and the first piston plate are connected via a rubber ring; the oil filling pipe is fixedly connected to the annular portion.

8. The bridge steel structure welding device according to claim 7, characterized in that: A second piston plate is slidably provided inside the cylinder, a second filter screen is installed on the second piston plate, and the first piston plate and the second piston plate are connected by a connecting rod.

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