Bridge steel structure welding device

Abstract

The application 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, the welding unit comprises a welding gun and a mechanical hand, and the control unit comprises a data collection module and a data processing module. In the application, when the distance between the upper end or the lower end of the anchorage and the profile steel surface is large, the intensity of the current is increased, the thermal compensation input of the current is increased, the width of the molten pool is increased, and incomplete penetration is prevented.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically to a welding apparatus for bridge steel structures. Background Technology

[0002] Bridge expansion joints are a type of bridge steel structure. They consist of right-angled steel sections and anchors. During welding, the anchors are welded onto these sections. In practical use, the expansion joints can freely expand and contract in two directions: parallel and perpendicular to the bridge axis.

[0003] Bridge expansion joints require welding equipment during manufacturing. Chinese Patent Application No. 202510006343.7 discloses a bridge expansion joint welding and fixing device with a limiting mechanism. This device includes a welding seat, a processing seat fixed to the surface of the welding seat, and bridge expansion joint steel sections abutting both sides of the processing seat surface. Limiting components are installed on the surface of the welding seat. This device effectively limits the position of the bridge expansion joint steel sections, ensuring their stability during welding. This improves welding quality, reduces welding defects caused by steel section displacement, and minimizes collisions or damage caused by steel section displacement. Simultaneously, the downward pressure plates at the four corners limit the steel sections, applying limiting forces from multiple directions, enhancing the overall limiting effect. This allows the steel sections to better resist external interference during welding, ensuring smooth welding.

[0004] However, in actual welding, the surface of the bridge expansion joint steel may tilt, causing an error in the distance between the lower end of the anchor and the surface of the steel. If the welding current is not adjusted, incomplete penetration will 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 this invention is to provide a bridge steel structure welding device that can effectively solve the above-mentioned technical problems.

[0007] To achieve the objectives of this invention, the following technical solution is adopted:

[0008] A bridge steel structure welding device includes: a fixing unit, a welding unit, and a control unit. The welding unit includes a welding torch and a robotic arm. The control unit includes a data collection module and a data processing module.

[0009] The data collection module collects the degree of inclination at two points on the same vertical position on the surface of the steel profile and transmits this information to the data processing module. The data processing module parses the data and calculates the verticality of the steel profile. The data processing module calculates the distance between the upper and lower ends of the anchor and the surface of the steel profile, and generates a welding current based on this distance.

[0010] Furthermore, the specific steps for generating welding current at the distance between the upper and lower ends of the anchor and the surface of the steel section are as follows:

[0011] Step S1: Detect the first distance a between the first position and the surface of the steel profile, move the position vertically by a distance b to the second position, and then detect the first distance c between the second position and the surface of the steel profile.

[0012] Step S2: Calculate the tilt angle n. .

[0013] Step S3: Adjust the current according to the preset value.

[0014] Furthermore, the fixing unit includes: a rotating body, a connector fixedly mounted on the rotating body, a pressing member hinged to the connector, and a contact member that brings the pressing member into contact with the steel structure.

[0015] Furthermore: the pressing member is composed of an abutting part and a pressing part, the abutting part is hinged to the pressing part, the pressing part is hinged to the connecting member, a push block is abutting below the abutting part of the pressing member, a push rod is fixedly connected to the push block, and the push block and the abutting part are connected by an inclined surface.

[0016] Furthermore, it also includes a fuel injection mechanism; the fuel injection mechanism includes: a fuel receiving box, a filter assembly, an fuel inlet pipe connecting the fuel receiving box and the filter assembly, and a fuel injection pipe.

[0017] Furthermore, the filter assembly includes: a cylinder, a first piston plate that moves within the cylinder, and an oil injection filter element that is fixedly installed inside the cylinder.

[0018] Furthermore: the oil injection filter element is composed of an annular part and a plate, on which a first filter screen can be installed, and the annular part is connected to the first piston plate by a rubber ring; the oil inlet pipe is fixedly connected to the annular part.

[0019] Furthermore: a second piston plate is slidably provided inside the cylinder, and a second filter screen is installed on the second piston plate. The first piston plate and the second piston plate are connected by a connecting rod.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 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 lower end of the anchor and the surface of the steel section is large, thereby increasing the width of the weld pool and preventing incomplete penetration. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0023] Figure 1 This is a flowchart illustrating the generation of welding current in the bridge steel structure welding device of the present invention.

[0024] Figure 2 This is a schematic diagram of the welding unit of the bridge steel structure welding device of the present invention.

[0025] Figure 3 This is a schematic diagram of the fixing unit of the bridge steel structure welding device of the present invention.

[0026] Figure 4 for Figure 3 An enlarged schematic diagram of part A in the middle.

[0027] Figure 5 This is a schematic diagram of the rotating body of the bridge steel structure welding device of the present invention.

[0028] Figure 6 This is a schematic diagram of the filter assembly of the bridge steel structure welding device of the present invention.

[0029] Figure 7 This is a cross-sectional view of the cylindrical body of the bridge steel structure welding device of the present invention.

[0030] Figure 8 This is a schematic diagram of the cylinder of the bridge steel structure welding device of the present invention from another angle.

[0031] In the diagram: 100, Fixed unit; 101, Rotating body; 102, Connecting part; 103, Pressing part; 104, Contact part; 105, Abutting part; 106, Pressing part; 107, Push rod; 108, Gear part; 109, Smooth part; 110, Rotating gear; 111, Power motor; 112, Support 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 injection filter; 121, Annular part; 122, Plate; 123, Rubber ring; 124, Second piston plate; 125, Connecting rod; 200, Welding unit; 201, Welding torch; 202, Robot arm. Detailed Implementation

[0032] To make the objectives, 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 some embodiments of the present invention, but not all embodiments.

[0033] It should be understood that although the steps in the flowcharts of the various embodiments of the present invention are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the various embodiments may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0034] 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.

[0035] The welding unit 200 includes a welding torch 201 and a robotic arm 202. The welding torch 201 is mounted on the robotic arm 202, and the robotic arm 202 drives the welding torch 201 to move.

[0036] The control unit includes a data collection module and a data processing module.

[0037] In one embodiment, the data collection module collects the pressure value between 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 an instruction.

[0038] In one embodiment, the data collection module collects the degree of inclination at two points on the same vertical position on the surface of the steel profile and transmits this information to the data processing module. The data processing module parses the data and calculates the verticality of the steel profile. The data processing module calculates the distance between the upper end and the lower end of the anchor and the surface of the steel profile, and generates a welding current based on this distance.

[0039] During welding, the welding current is a crucial parameter. Since the distances between the upper and lower ends of the anchor and the surface of the steel profile are relatively fixed and small, single-layer welding is generally used. If the wire diameter and welding current remain constant, incomplete penetration may occur when the distance is large, leading to an unreliable weld. Therefore, when the distance between the upper or lower ends of the anchor and the surface of the steel profile is large, i.e., when the inclination angle is large, the current intensity and thermal compensation input should be increased to increase the width of the weld pool and prevent incomplete penetration.

[0040] The specific steps for generating welding current at the distance between the upper and lower ends of the anchor and the surface of the steel section are as follows:

[0041] Step S1: The data collection module is a laser rangefinder. First, it detects the first distance a between the first position and the surface of the steel profile. After moving a distance b in the vertical direction, it reaches the second position and then detects the first distance c between the second position and the surface of the steel profile.

[0042] Step S2: Calculate the tilt angle n. .

[0043] Step S3: Adjust the current according to the tilt angle.

[0044] It should be noted here that, based on experience and the inspection of the finished product after welding, a table of reference for welding angle and current is set up manually. Once the welding angle is detected, the data processing module can automatically match it.

[0045] The fixing unit 100 includes: a rotating body 101, a connecting member 102 fixedly mounted on the rotating body 101, a pressing member 103 hinged to the connecting member 102, and a contact member 104 that brings the pressing member 103 into contact with the steel structure. Two rotating bodies 101 are provided, and the connecting member 102 connects the two rotating bodies 101. The pressing member 103 consists of an abutment portion 105 and a pressing portion 106, the abutment portion 105 being hinged to the pressing portion 106, and the pressing portion 106 being hinged to the connecting member 102.

[0046] In actual use, the abutting part 105 moves upward and applies force to one end of the pressing part 106, thereby causing the other end of the pressing part 106 to move downward and press the steel structure.

[0047] In one embodiment, a pressure sensor is installed on the pressing part 106, which can measure the pressure between the pressing part 106 and the steel structure.

[0048] The contact element 104 is a push block, and a push rod 107 is fixedly connected to the push block. The push block and the abutment part 105 are connected by an inclined surface. When the push rod 107 drives the push block to move, the abutment part 105 can move upward.

[0049] The first instruction is: the power component connected to the push rod 107 stops operating, and the power component can be a cylinder.

[0050] The rotating body 101 is composed of a gear part 108 and a smooth part 109. The gear part 108 is meshed 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. Thus, the power motor 111 can drive the rotating body 101 to rotate during the rotation process.

[0051] Two support wheels 112 abut against the smooth part 109 and are located on both sides of the smooth part 109, mainly to support the rotating body 101.

[0052] As a further improvement of the present invention, the rotating body 101 is externally covered by a housing 113, and a pressing wheel is rotatably mounted on the upper part of the housing 113, the pressing wheel abutting against the smooth part 109. Applying pressure to the rotating body 101 from above allows the rotating body 101 to rotate stably.

[0053] Because it is used in a welding environment, the gear part 108 and the rotating gear 110 will be contaminated with welding fumes, resulting in wear and reduced service life. Therefore, an oil spraying mechanism is needed to spray oil on the gear part 108 and the rotating gear 110 to wash away the welding fumes. In addition, the oil needs to be filtered to reduce the cost of use.

[0054] 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 that sprays oil onto the gear part 108 and the rotating gear 110.

[0055] Gear pumps can be installed on the oil inlet pipe 116 and the oil injection pipe 117 as needed, thereby accelerating the flow of oil.

[0056] It should be noted here that the main purpose of the oil in this application is to flush away solids such as welding fumes from the gear section 108 and the rotating gear 110, so a low-cost cutting fluid can be used.

[0057] The filter assembly 115 includes: a cylinder 118, a first piston plate 119 that moves within the cylinder 118, and an oil injection filter element 120 fixedly installed inside the cylinder 118; the oil injection filter element 120 is composed of an annular portion 121 and a plate 122, on which a first filter screen can be installed, and the annular portion 121 and the first piston plate 119 are connected by a rubber ring 123; an oil inlet pipe 116 is fixedly connected to the annular portion 121, and oil flows into the space between the first piston plate 119 and the plate 122. At this time, the first piston plate 119 can reciprocate, thereby driving the oil to flow, so that the oil passes through the first filter screen for initial filtration of the oil.

[0058] The cylinder 118 is slidably provided with a second piston plate 124, and a second filter screen 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, thereby causing the second filter screen to move and fully filter the oil.

[0059] In other words, during the movement of the first piston plate 119 in this application, the rubber ring 123 can be deformed, thereby squeezing the oil and allowing the oil to pass through the first filter screen for filtration. Moreover, when the first piston plate 119 moves, it can drive the second piston plate 124 to move, thereby causing the second filter screen to move and fully filter the oil, thus achieving secondary filtration with good filtration effect.

[0060] In this application, the first piston plate 119 can be driven by a cylinder or by an electric motor, which is common knowledge and will not be described in detail here.

[0061] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can 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), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0063] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A bridge steel structure welding apparatus characterized by comprising: The utility model relates to a steel structure automatic welding device, including: Fixed unit, welding unit and control unit, the welding unit includes welding torch and manipulator, the control unit includes data collection module, data processing module, The data collection module collects the inclination degree of two points at the same vertical position on the profile steel surface and transmits the information to the data processing module, the data processing module carries out data analysis and calculates the perpendicularity of the profile steel, the data processing module calculates the distance between the upper end of the anchor and the lower end of the anchor and the profile steel surface and generates the welding current according to the distance.

2. The bridge steel structure welding apparatus according to claim 1, characterized by: The fixed unit includes a rotating body, a connecting piece fixedly installed on the rotating body, a pressing piece hinged to the connecting piece and a contact piece for contacting the steel structure with the pressing piece.

3. The bridge steel structure welding apparatus according to claim 2, wherein: The pressing piece is composed of an abutting portion and a pressing portion, the abutting portion is hinged to the pressing portion, the pressing portion is hinged to the connecting piece, a push block is abutted below the abutting portion of the pressing piece, a push rod is fixedly connected to the push block, and the push block and the abutting portion are connected through an inclined surface.

4. A bridge steel structure welding apparatus according to claim 1 or 2, 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.

5. The bridge steel structure welding apparatus according to claim 4, wherein: The filter assembly includes a cylinder, a first piston plate moving in the cylinder, an oil injection filter fixedly installed inside the cylinder.

6. The bridge steel structure welding apparatus according to claim 5, wherein: The oil injection filter is composed of a ring-shaped portion and a plate, a first filter screen is installed on the plate, the ring-shaped portion and the first piston plate are connected through a rubber ring, and the oil inlet pipe is fixedly connected to the ring-shaped portion.

7. The bridge steel structure welding apparatus according to claim 6, wherein: A second piston plate is slidably arranged 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 through a connecting rod.

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