A profile steel laser welding guide and pressure control device for near net shape experiment

Abstract

The utility model provides a kind of for near working condition experiment's profile steel laser welding guiding and voltage control device, it is related to T profile steel welding field, including: guiding mechanism and laser welding head, the guiding mechanism includes fixed frame, first air cylinder, first roller stand, first guide wheel, recess, second air cylinder, second roller stand and second guide wheel, the bottom of the guiding mechanism is provided with conveying mechanism.The utility model, by adjusting roller angle and clamping spacing, ensure that T profile steel moves along correct trajectory during welding process, by fixed laser head, avoid the unstable problem of light path possibly caused by the movement of laser head, all contact guiding parts are configured modular quick-change interface, meet the quick change type demand of different types, different specification profile steel, by adjusting roller angle and clamping spacing, the self-adapting guidance and stable centering of T profile steel can be realized.

Description

Technical Field

[0001] This utility model belongs to the field of T-shaped steel welding technology, specifically relating to a guide and pressure control device for laser welding of T-shaped steel for near-operational experiments. Background Technology

[0002] In the field of high-end equipment manufacturing, T-beams, as an important load-bearing component, are widely used in shipbuilding, bridges, marine engineering, and other fields. Due to their excellent load-bearing capacity and ease of assembly, T-beams play an irreplaceable role in large and complex structures. In recent years, the integrated process of roll forming and dual-beam laser welding has gradually become the core technology path for the efficient manufacturing of T-beams, effectively improving structural strength, dimensional accuracy, and manufacturing efficiency. However, in practical applications, due to the asymmetry of the T-beam cross-section, especially the concentrated heat input at the flange-web connection, problems such as structural warping, trajectory deviation, and weld misalignment are easily caused during the welding process, seriously affecting welding quality and the straightness of the component. Furthermore, most existing laser welding platforms use a method of moving the laser head and fixing the workpiece. The movement of the laser head leads to a complex control system, increasing the difficulty of equipment operation and hindering the stability of the optical path, affecting observation and control during the welding process. Secondly, fixing the workpiece cannot meet the needs of different welding angles and complex deformations, and cannot flexibly adjust the welding trajectory. Such platforms have complex structures and are not suitable for welding short-length samples, especially in laboratory conditions where they cannot meet the needs of near-operational simulation. Utility Model Content

[0003] The purpose of this invention is to provide a guide and pressure control device for flexible roll forming laser welding of structural steel for near-working condition experiments, so as to achieve dynamic forming and deformation suppression during the welding process, improve welding quality and simplify operation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: including a guiding mechanism and a laser welding head, wherein the guiding mechanism includes a fixed frame, a first cylinder, a first roller frame, a first guide wheel, a groove, a second cylinder, a second roller frame, and a second guide wheel, and a conveying mechanism is provided at the bottom of the guiding mechanism, wherein the conveying mechanism includes a first conveying frame, an installation groove, a quick-release roller, a transparent protective shell, a second conveying frame, and a fixed roller, and a T-shaped steel is provided at the top of the conveying mechanism.

[0005] In a preferred embodiment, the side of the fixing frame closest to the horizontal central axis is fixedly connected to one side of the housing of the first cylinder, and the extension end of the first cylinder is fixedly connected to one side of the first roller frame.

[0006] In a preferred embodiment, the inner wall of the other side of the first roller frame is rotatably connected to both ends of the first guide wheel via a pivot, and the outer wall of the first guide wheel is provided with a groove.

[0007] In a preferred embodiment, the inner wall of the groove is movably connected to the outer wall of the column end of the T-shaped steel, and both sides of the fixing frame are fixedly connected to one side of the housing of the second cylinder.

[0008] In a preferred embodiment, the extension end of the second cylinder is fixedly connected to one side of the second roller frame, and the inner wall of the other side of the second roller frame is rotatably connected to both ends of the second guide wheel via a rotating shaft.

[0009] In a preferred embodiment, a first conveyor frame is provided below the fixing frame, and multiple sets of mounting slots are provided on both sides of the first conveyor frame.

[0010] In a preferred embodiment, the inner wall of the mounting groove is rotatably connected to the outer walls of both ends of the quick-release roller, and a gap is provided between the quick-release rollers in the middle section of the first conveyor frame to allow the first guide wheel to rotate. The outer wall of the quick-release roller is provided with a stabilizing groove that matches the bottom outer wall of the T-shaped steel.

[0011] In a preferred embodiment, the top of the first conveyor frame is fixedly connected to the bottom of the transparent protective shell, the transparent protective shell is disposed around the laser welding head, a second conveyor frame is disposed on one side of the first conveyor frame, the inner side of the second conveyor frame is rotatably connected to both ends of the fixed roller via a rotating shaft, and the top of the quick-release roller and the fixed roller are movably connected to the bottom of the T-shaped steel.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. This device adopts a design scheme of fixed laser head and movable steel profile. Unlike traditional laser welding devices, this device ensures the stability of the beam path by fixing the laser head, thereby avoiding the instability of the optical path that may be caused by the movement of the laser head. This design greatly simplifies the system structure and improves the stability and accuracy of the laser welding process. It is especially suitable for welding short-length samples in a laboratory environment.

[0013] 2. In this utility model, the T-shaped steel to be welded is placed above the second conveyor frame. The T-shaped steel moves towards the first conveyor frame via fixed rollers, entering a position above the quick-release rollers, so that the T-shaped steel is positioned between the first guide wheel and the second guide wheel. Simultaneously, the column end of the T-shaped steel enters the interior of the groove. By activating the first cylinder, the first roller frame moves towards the T-shaped steel, and the first guide wheel presses and stabilizes the upper and lower sides of the T-shaped steel. Activating the second cylinder moves the second roller frame towards the T-shaped steel, and the second guide wheel presses and stabilizes the sides of the T-shaped steel. As the T-shaped steel moves, it is welded by a fixed laser welding head. A heavy-duty T-shaped slide rail structure is adopted, equipped with an adjustable roller guide assembly. By adjusting the roller angle and clamping distance, adaptive guidance and stable centering of the T-shaped steel can be achieved, ensuring that the T-shaped steel moves along the correct trajectory during welding and preventing weld misalignment and structural deformation caused by trajectory deviation.

[0014] 3. This utility model utilizes a transparent protective shell for protection. When welding T-shaped steel of different specifications, quick-release rollers are removed from the mounting groove, and then quick-release rollers with stabilizing grooves of different sizes are placed back into the mounting groove. The transparent protective shell protects the laser beam path, ensuring the stability of the welding process. A U-shaped channel or high-temperature protection window is set in the laser beam passage area to ensure a clear and unobstructed laser beam path. Optional protective devices such as automatic heat insulation curtains and anti-spatter air curtains can be added to improve the safety of the optical path and environmental adaptability, ensuring that the laser welding process is not affected by external factors.

[0015] 4. In this utility model, all contact guide parts are equipped with modular quick-change interfaces, which can be quickly installed and disassembled through a pin-type or magnetic structure, meeting the needs of quick changeover of different types and specifications of steel, and significantly improving changeover efficiency in the laboratory environment. Attached Figure Description

[0016] Figure 1 A schematic diagram of a guide and pressure control device for laser welding of structural steel for near-working condition experiments provided by this utility model; Figure 2 A schematic diagram of the guiding mechanism of a laser welding guide and pressure control device for near-working condition experiments of steel profiles provided by this utility model; Figure 3 A schematic diagram of the conveying mechanism of a guide and pressure control device for laser welding of profiled steel for near-working condition experiments provided by this utility model; Figure 4 A schematic diagram of the first conveyor frame of a guide and pressure control device for laser welding of profiled steel for near-working condition experiments provided by this utility model.

[0017] Legend: 1. Guiding mechanism; 101. Fixed frame; 102. First cylinder; 103. First roller frame; 104. First guide wheel; 105. Groove; 106. Second cylinder; 107. Second roller frame; 108. Second guide wheel; 2. Conveying mechanism; 201. First conveying frame; 202. Mounting groove; 203. Quick-release roller; 204. Transparent protective shell; 205. Second conveying frame; 206. Fixed roller; 3. Laser welding head; 4. T-shaped steel. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-4 This utility model provides a technical solution including: a guide mechanism 1 and a laser welding head 3. The guide mechanism 1 includes a fixed frame 101, a first cylinder 102, a first roller frame 103, a first guide wheel 104, a groove 105, a second cylinder 106, a second roller frame 107, and a second guide wheel 108. A conveying mechanism 2 is provided at the bottom of the guide mechanism 1. The conveying mechanism 2 includes a first conveying frame 201, a mounting groove 202, a quick-release roller 203, a transparent protective shell 204, a second conveying frame 205, and a fixed roller 206. A T-shaped steel bar 4 is provided at the top of the conveying mechanism 2.

[0020] In one embodiment, the side of the fixing frame 101 closest to the horizontal central axis is fixedly connected to one side of the housing of the first cylinder 102. The extension end of the first cylinder 102 is fixedly connected to one side of the first roller frame 103. The inner wall of the other side of the first roller frame 103 is rotatably connected to both ends of the first guide wheel 104 via a rotating shaft. The outer wall of the first guide wheel 104 is provided with a groove 105. The inner wall of the groove 105 is movably connected to the outer wall of the column end of the T-shaped steel 4. Both sides of the fixing frame 101 are fixedly connected to one side of the housing of the second cylinder 106. The extension end of the second cylinder 106 is fixedly connected to one side of the second roller frame 107. The inner wall of the other side of the second roller frame 107 is rotatably connected to both ends of the second guide wheel 108 via a rotating shaft.

[0021] Specifically: The T-shaped steel 4 is guided and pressure-controlled by the first guide wheel 104 and the second guide wheel 108, ensuring the stability of the T-shaped steel 4 during movement. Simultaneously, the movement of the T-shaped steel 4 and the fixing of the laser welding head 3 facilitates adjustment of the welding trajectory, simplifying the structure of the device and facilitating the welding of short-length samples. The flexible pressure control mechanism, composed of the first roller frame 103, the second roller frame 107, the first guide wheel 104, and the second guide wheel 108, can dynamically and flexibly press the column end and flange end of the T-shaped steel 4 during laser welding. The pressing force is adjusted in real time by controlling the pressure of the first cylinder 102 and the second cylinder 106 (in the prior art, air is used to adjust the pressing force). Cylinder pressure control for real-time adjustment of clamping force has been widely used in clamping mechanisms of various automated equipment. By using a pneumatic control system (including conventional components such as pressure sensors, solenoid valves, proportional pressure valves, and controllers) to monitor and regulate the input air pressure of the cylinder in real time, dynamic adjustment of the cylinder's output clamping force can be achieved. The pressure sensor collects the working pressure of the cylinder in real time and feeds it back to the controller. The controller, based on preset clamping force parameters or external trigger signals, adjusts the compressed air pressure input to the cylinder by controlling the opening of the proportional pressure valve, thereby changing the force exerted by the cylinder piston rod on the clamped part, achieving real-time adjustment of the clamping force. In this application, the real-time pressure adjustment method of the first cylinder 102 and the second cylinder 106 follows the conventional pneumatic control logic in the aforementioned prior art, achieving pressure-controlled welding and reducing welding deformation. The laser welding head 3 is fixedly set, and the T-shaped steel 4 moves along the conveying mechanism 2, completing an integrated operation of simultaneous guidance, pressure control, and welding when passing through the area of ​​the guide mechanism 1.

[0022] In one embodiment, a first conveyor frame 201 is provided below the fixed frame 101. Multiple sets of mounting grooves 202 are provided on both sides of the first conveyor frame 201. The inner wall of the mounting groove 202 is rotatably connected to the outer walls of the two ends of the quick-release roller 203. A gap is provided between the quick-release rollers 203 in the middle section of the first conveyor frame 201 to allow the first guide wheel 104 to rotate. The outer wall of the quick-release roller 203 is provided with a stabilizing groove that matches the bottom outer wall of the T-shaped steel 4. The top of the first conveyor frame 201 is fixedly connected to the bottom of the transparent protective shell 204. The transparent protective shell 204 is provided around the laser welding head 3. A second conveyor frame 205 is provided on one side of the first conveyor frame 201. The inner side of the second conveyor frame 205 is rotatably connected to the two ends of the fixed roller 206 through a rotating shaft. The top of the quick-release roller 203 and the fixed roller 206 are movably connected to the bottom of the T-shaped steel 4.

[0023] Specifically: by removing the quick-release roller 203 from the inside of the mounting slot 202, and then placing the quick-release roller 203 with different sized stabilizing slots into the inside of the mounting slot 202, the replacement of the quick-release roller 203 facilitates the adaptation of T-shaped steel 4 of different specifications.

[0024] Working principle: The T-shaped steel 4 to be welded is placed above the second conveyor frame 205. The T-shaped steel 4 moves towards the first conveyor frame 201 via the fixed rollers 206, and then moves above the quick-release rollers 203, so that the T-shaped steel 4 is positioned between the first guide rollers 104 and the second guide rollers 108. At the same time, the column end of the T-shaped steel 4 enters the interior of the groove 105. By activating the first cylinder 102, the first roller frame 103 is moved towards the T-shaped steel 4, and then the first guide rollers 104 move the upper and lower sides of the T-shaped steel 4. After compression and stabilization, the second cylinder 106 is activated to drive the second roller frame 107 to move towards the T-shaped steel 4. Then, the second guide wheel 108 compresses and stabilizes both sides of the T-shaped steel 4. As the T-shaped steel 4 moves, it is welded by the fixed laser welding head 3. At the same time, it is protected by the transparent protective shell 204. When welding T-shaped steel 4 of different specifications, the quick-release roller 203 is taken out from the inside of the mounting groove 202, and then the quick-release roller 203 with different sized stabilizing grooves is put into the inside of the mounting groove 202.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A guiding and pressure control device for laser welding of structural steel in near-operational testing, characterized in that, include: The guide mechanism (1) and the laser welding head (3) include a fixed frame (101), a first cylinder (102), a first roller frame (103), a first guide wheel (104), a groove (105), a second cylinder (106), a second roller frame (107) and a second guide wheel (108). The bottom of the guide mechanism (1) is provided with a conveying mechanism (2). The conveying mechanism (2) includes a first conveying frame (201), a mounting groove (202), a quick-release roller (203), a transparent protective shell (204), a second conveying frame (205) and a fixed roller (206). The top of the conveying mechanism (2) is provided with a T-shaped steel (4).

2. The guide and pressure control device for laser welding of structural steel for near-working condition experiments according to claim 1, characterized in that: The side of the fixed frame (101) near the horizontal central axis is fixedly connected to one side of the housing of the first cylinder (102), and the extension end of the first cylinder (102) is fixedly connected to one side of the first roller frame (103).

3. The guide and pressure control device for laser welding of structural steel for near-working condition experiments according to claim 2, characterized in that: The inner wall of the other side of the first roller frame (103) is rotatably connected to both ends of the first guide wheel (104) via a rotating shaft, and the outer wall of the first guide wheel (104) is provided with a groove (105).

4. The guide and pressure control device for laser welding of structural steel for near-working condition experiments according to claim 3, characterized in that: The inner wall of the groove (105) is movably connected to the outer wall of the column end of the T-shaped steel (4), and both sides of the fixing frame (101) are fixedly connected to one side of the housing of the second cylinder (106).

5. The guide and pressure control device for laser welding of structural steel for near-working condition experiments according to claim 4, characterized in that: The extension end of the second cylinder (106) is fixedly connected to one side of the second roller frame (107), and the inner wall of the other side of the second roller frame (107) is rotatably connected to both ends of the second guide wheel (108) through a rotating shaft.

6. The guide and pressure control device for laser welding of structural steel for near-working condition experiments according to claim 1, characterized in that: A first conveyor frame (201) is provided below the fixed frame (101), and multiple sets of mounting slots (202) are provided on both sides of the first conveyor frame (201).

7. The guide and pressure control device for laser welding of structural steel for near-working condition experiments according to claim 6, characterized in that: The inner wall of the mounting groove (202) is rotatably connected to the outer walls of both ends of the quick-release roller (203). A gap is provided between the quick-release rollers (203) in the middle section of the first conveyor frame (201) to allow the first guide wheel (104) to rotate. The outer wall of the quick-release roller (203) is provided with a stabilizing groove that matches the bottom outer wall of the T-shaped steel (4).

8. The guide and pressure control device for laser welding of structural steel for near-working condition experiments according to claim 7, characterized in that: The top of the first conveyor frame (201) is fixedly connected to the bottom of the transparent protective shell (204). The transparent protective shell (204) is set around the laser welding head (3). A second conveyor frame (205) is set on one side of the first conveyor frame (201). The inner side of the second conveyor frame (205) is rotatably connected to both ends of the fixed roller (206) through a rotating shaft. The top of the quick-release roller (203) and the fixed roller (206) are movably connected to the bottom of the T-shaped steel (4).

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