Laser calibration welding fixture for hardfacing of gate valve
By combining cylinder clamping and an infrared calibration system, the problem of inaccurate positioning during the welding process of gate valves is solved, achieving high-precision welding and stable fixation, thus improving the welding quality and ease of operation of gate valves.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI CHANGCHENG AUTOMATIC CONTROL EQUIP CO LTD
- Filing Date
- 2025-08-28
- Publication Date
- 2026-07-24
AI Technical Summary
In the existing gate valve welding process, the welding fixture is difficult to position accurately, resulting in welding position deviation, which affects sealing performance and service life. In addition, there is a lack of effective calibration mechanism, which cannot meet the high precision requirements of laser welding.
Multiple cylinders are used to drive the clamping plate for precise clamping. Combined with an infrared transmitter and receiver, a laser calibration system is formed to monitor the welding position in real time. Fine-tuning with cylinders ensures welding accuracy, enabling stable fixation and high-precision calibration of gate valves of different specifications.
It achieves precise positioning and high-precision welding of gate valves, improves welding quality, reduces labor intensity for workers, and enhances ease of operation and equipment applicability.
Smart Images
Figure CN224543620U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding fixture technology, and more specifically, to a laser calibration welding fixture for gate valve overlay welding. Background Technology
[0002] In industrial production, gate valves are important fluid control components, and their sealing performance and durability are crucial. Welding can form an alloy layer with special properties on the surface of the gate valve, effectively improving its wear resistance, corrosion resistance and sealing performance. Laser welding, due to its advantages such as concentrated energy, small heat-affected zone and high welding precision, has become the ideal welding method for gate valve welding.
[0003] Utility model patent CN220073700U discloses a semi-automatic calibration fixture for laser welding of battery box shells. The fixture includes a support plate, a placement plate fixedly connected to one side of the support plate, and a drive motor fixedly connected to the upper surface of the placement plate. By incorporating the drive motor, a flipping rod, and a limiting rod, when welding the battery box shell, it is simply placed on the welding table, which clamps and limits its position. After clamping, the welding assembly is activated to weld the upper part of the shell. After welding, the drive motor is activated, driving the flipping rod to rotate. The flipping rod then rotates the welding table, which in turn rotates the limiting rod within a limiting plate, further improving the stability of the welding table during flipping. After the welding table is flipped, the welding assembly welds the remaining portion, thus avoiding the time-consuming and labor-intensive process of difficult angle adjustment.
[0004] While the aforementioned technical solutions have their respective advantages, current welding fixtures used in the gate valve surfacing process have some shortcomings. Firstly, traditional fixtures struggle to accurately position the gate valve, leading to displacement during welding and resulting in weld position deviations that affect the valve's sealing performance and service life. Secondly, existing fixtures lack effective calibration mechanisms, failing to guarantee weld position alignment and thus failing to meet the high-precision requirements of laser welding. Therefore, we propose a laser-calibrated welding fixture for gate valve surfacing. Utility Model Content
[0005] The purpose of this invention is to provide a laser calibration welding fixture for gate valve overlay welding, so as to solve the defects mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: A laser calibration welding fixture for gate valve overlay welding includes a processing panel with multiple positioning holes. A top plate is provided above the processing panel, and multiple infrared emitters for laser calibration are fixedly installed at the bottom of the top plate. A bottom plate is provided below the processing panel, and multiple infrared receivers are fixedly installed on the upper surface of the bottom plate. The infrared receivers, infrared emitters, and corresponding positioning holes are located on the same vertical axis. Multiple cylinders are fixedly installed on the upper surface of the processing panel, and clamping plates for clamping and fixing workpieces are detachably installed at the ends of the telescopic shafts of the cylinders.
[0007] Preferably, a support frame is fixedly installed on the rear side panel of the top plate, and the support frame is fixedly installed on the processing panel.
[0008] Preferably, a rectangular plate is fixedly installed at the end of the telescopic shaft of the cylinder, and the clamping plate is detachably installed on the side of the rectangular plate.
[0009] Preferably, the processing panel is provided with a plurality of sliding holes, and a slider is fixedly installed on the bottom surface of the clamping plate. The slider is located in the sliding hole and is slidably connected to the sliding hole. This setting guides the movement of the clamping plate, making it more stable during movement.
[0010] Preferably, a plurality of support legs are fixedly installed on the bottom surface of the processing panel, and a fixing seat is fixedly installed at the bottom end of the support legs, and the fixing seat is fixedly installed on an external welding frame.
[0011] Preferably, a plurality of fixing rods are fixedly installed on the top surface of the base plate, and a fixing plate is fixedly installed at the top end of the fixing rods. The fixing plate is detachably installed on the bottom surface of the processing panel.
[0012] Preferably, the front and left and right sides of the support frame are connected to the outside, and a control host is provided on one side of the processing panel.
[0013] Preferably, a support rod is fixedly installed at the bottom of the control host, and the support rod is fixedly installed on the external frame. Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses multiple cylinders to drive the clamping plate to clamp the gate valve. Multiple cylinders can ensure more precise clamping. With the slider sliding in the sliding hole, it can achieve stable fixation of gate valves of different specifications, avoid displacement during welding, solve the problem of inaccurate positioning of traditional fixtures, and achieve the effect of ensuring accurate welding position.
[0014] 2. This utility model forms a laser calibration system by having an infrared transmitter on the top plate, a positioning hole on the processing panel, and an infrared receiver on the bottom plate work together to monitor in real time whether the gate valve position deviates from the preset trajectory. Once it deviates, the corresponding cylinder can be finely adjusted to ensure that the welding position is accurately aligned, meeting the high precision requirements of laser welding and achieving the effect of improving the quality of the weld overlay.
[0015] 3. This utility model achieves detachable installation of the clamping plate through the setting of the rectangular plate, which facilitates the replacement of the appropriate clamping plate according to the specifications of the gate valve. The control host centrally regulates the cylinder and calibration system, simplifies the operation process, reduces the labor intensity of workers, and at the same time, the support legs and fixed seat ensure the stable operation of the equipment, thereby improving the ease of operation and applicability of the equipment. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is one of the partial structural schematic diagrams of this utility model; Figure 4 This is the second partial structural schematic diagram of the present utility model; The meanings of the labels in the diagram are as follows: 1. Processing panel; 10. Positioning hole; 11. Sliding hole; 12. Support leg; 121. Fixing base; 13. Base plate; 131. Infrared receiver; 14. Fixing rod; 141. Fixing plate; 15. Support frame; 16. Top plate; 161. Infrared transmitter; 17. Control host; 171. Support rod; 2. Cylinder; 20. Rectangular plate; 21. Clamping plate; 22. Slider. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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. Please see Figures 1-4This utility model provides a technical solution: a laser calibration welding fixture for gate valve overlay welding, including a processing panel 1, on which multiple positioning holes 10 are provided; a top plate 16 is provided above the processing panel 1; multiple infrared emitters 161 for laser calibration are fixedly installed at the bottom of the top plate 16; a bottom plate 13 is provided below the processing panel 1; multiple infrared receivers 131 are fixedly installed on the upper surface of the bottom plate 13; the infrared receivers 131, infrared emitters 161, and corresponding positioning holes 10 are located on the same vertical axis, forming a precise laser calibration path, providing a reference for the positioning of the gate valve, and ensuring... The accuracy of welding position calibration ensures that only when the gate valve is correctly positioned can the infrared receiver 131 receive the signal from the infrared transmitter 161, achieving the effect of laser calibration. Multiple cylinders 2 are fixedly installed on the upper surface of the processing panel 1. The telescopic shaft end of the cylinder 2 is detachably equipped with a clamping plate 21 for clamping and fixing the workpiece. This allows the cylinder 2 to push the clamping plate 21 to clamp and fix the gate valve. When the corresponding infrared receiver 131 does not receive the signal from the infrared transmitter 161, activating the corresponding cylinder 2 can push the gate valve to adjust its position, achieving the effect of calibration clamping.
[0018] In this embodiment, a support frame 15 is fixedly installed on the rear side plate of the top plate 16. The support frame 15 is fixedly installed on the processing panel 1 to provide stable support for the top plate 16 and the infrared emitter 161, so as to avoid the laser calibration accuracy being affected by shaking during the calibration process and ensure the stable operation of the calibration system.
[0019] like Figure 4 As shown, a rectangular plate 20 is fixedly installed at the end of the telescopic shaft of the cylinder 2. The clamping plate 21 is detachably installed on the side of the rectangular plate 20 by multiple fastening bolts, which makes it easy to replace the appropriate clamping plate 21 according to the size of the gate valve, thereby improving the adaptability of the fixture to workpieces of different specifications.
[0020] Specifically, the processing panel 1 is provided with multiple sliding holes 11, and a slider 22 is fixedly installed on the bottom surface of the clamping plate 21. The slider 22 is located in the sliding hole 11 and is slidably connected to the sliding hole 11, providing guidance for the movement of the clamping plate 21, preventing the clamping plate 21 from shifting during the clamping process, and ensuring that the clamping action is stable and accurate.
[0021] like Figure 1 As shown, multiple support legs 12 are fixedly installed on the bottom surface of the processing panel 1. A fixed seat 121 is fixedly installed at the bottom end of the support leg 12. The fixed seat 121 is fixedly installed on the external welding frame to provide a stable foundation for the overall operation.
[0022] In addition, multiple fixing rods 14 are fixedly installed on the top surface of the base plate 13, and a fixing plate 141 is fixedly installed on the top of the fixing rod 14. The fixing plate 141 can be detachably installed on the bottom surface of the processing panel 1, which facilitates the installation, maintenance and replacement of the base plate 13 and the infrared receiver 131, and improves the convenience of equipment maintenance.
[0023] It is worth noting that the front and left and right sides of the support frame 15 are connected to the outside, allowing the welding robotic arm on the laser welding machine to extend into the welding area from the front and left and right sides to perform the welding operation on the gate valve. It is worth noting that a control host 17 is provided on one side of the processing panel 1. A support rod 171 is fixedly installed at the bottom of the control host 17. The support rod 171 is fixedly installed on the external frame. The control host 17 receives the signal from the infrared receiver 131. When one of the infrared receivers 131 does not receive the signal from the infrared transmitter 161, it proves that the gate valve is not positioned accurately. At this time, the control host 17 controls the cylinder 2 on the corresponding side to drive the clamping plate 21 to push the gate valve to move, so that the gate valve can be positioned accurately and the adjustment operation is completed.
[0024] It is worth noting that the infrared transmitter 161 is installed at the bottom of the top plate 16. After being powered on, it continuously emits infrared signals downwards. The signals pass through the corresponding positioning holes 10 on the processing panel 1 to form a vertical calibration optical path. When the gate valve is placed on the processing panel 1, if the position is accurate, it will not block the optical path, and the infrared receiver 131 can receive the complete signal. If the position is off, the gate valve will block part of the optical path, and the corresponding infrared receiver 131 will receive a interrupted or weakened signal. This status information will be transmitted to the control host 17 in real time. The control host 17, as the core control unit, receives the signals from each infrared receiver 131 and analyzes and judges them. When all receivers receive signals, it is determined that the gate valve is in an accurate position. The control host 17 sends a clamping command to the cylinder 2. The cylinder 2 drives the clamping plate 21 to move smoothly along the slider 22 in the sliding hole 11 to firmly clamp the gate valve. If there is a situation where the infrared receiver 131 does not receive a signal, the control host 17 determines the offset direction and amplitude of the gate valve according to the position of the receiver with missing signals, and then sends an adjustment command to the cylinder 2 on the corresponding side. The cylinder 2 pushes the clamping plate 21 through the telescopic shaft. By using the contact between the clamping plate 21 and the gate valve, the gate valve is moved to the calibration position until all infrared receivers 131 receive the signal. Then the control host 17 issues a clamping command to complete the calibration clamping and ensure that the gate valve is in the precise welding position.
[0025] Finally, it should be noted that the infrared transmitter 161, infrared receiver 131, cylinder 2, control host 17, corresponding control system, and external power supply involved in this utility model are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adapted controllers and power supplies, are connected by wires. The specific connection method should refer to the working principle of this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.
[0026] When using the laser calibration welding fixture for gate valve overlay welding of this utility model, place the gate valve on the processing panel 1 to ensure that it is roughly in the position to be welded, start the equipment, the infrared transmitter 161 on the top plate 16 emits an infrared signal, the signal passes through the positioning hole 10 and is received by the infrared receiver 131 on the bottom plate 13, and the relevant signal is transmitted to the control host 17 in real time. If the gate valve is misaligned, some infrared receivers 131 will not receive a signal. The control host 17 will control the corresponding cylinder 2 to start, push the clamping plate 21, and slide the slider 22 along the sliding hole 11 to move the gate valve until all infrared receivers 131 receive a signal. The control host 17 will then instruct the cylinder 2 to drive the clamping plate 21 to firmly clamp the gate valve. Subsequently, the robotic arm of the laser welding machine extends from the front or left and right sides of the support frame 15 to perform welding on the gate valve. After the welding is completed, the control host 17 controls the cylinder 2 to reset, removes the gate valve, and completes the operation.
[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A laser calibration welding fixture for gate valve overlay welding, comprising a processing panel (1), characterized in that: The processing panel (1) is provided with multiple positioning holes (10), and a top plate (16) is provided above the processing panel (1). Multiple infrared emitters (161) for laser calibration are fixedly installed at the bottom of the top plate (16). A bottom plate (13) is provided below the processing panel (1). Multiple infrared receivers (131) are fixedly installed on the upper surface of the bottom plate (13). The infrared receivers (131), the infrared emitters (161) and the corresponding positioning holes (10) are located on the same vertical axis. Multiple cylinders (2) are fixedly installed on the upper surface of the processing panel (1). A clamping plate (21) for clamping and fixing the workpiece is detachably installed at the end of the telescopic shaft of the cylinder (2).
2. The laser calibration welding fixture for gate valve overlay welding according to claim 1, characterized in that: A support frame (15) is fixedly installed on the rear side plate of the top plate (16), and the support frame (15) is fixedly installed on the processing panel (1).
3. The laser calibration welding fixture for gate valve overlay welding according to claim 1, characterized in that: A rectangular plate (20) is fixedly installed at the end of the telescopic shaft of the cylinder (2), and the clamping plate (21) is detachably installed on the side of the rectangular plate (20).
4. The laser calibration welding fixture for gate valve overlay welding according to claim 1, characterized in that: The processing panel (1) is provided with a plurality of sliding holes (11), and a slider (22) is fixedly installed on the bottom surface of the clamping plate (21). The slider (22) is located in the sliding hole (11) and is slidably connected to the sliding hole (11).
5. The laser calibration welding fixture for gate valve overlay welding according to claim 1, characterized in that: Multiple support legs (12) are fixedly installed on the bottom surface of the processing panel (1), and a fixed seat (121) is fixedly installed at the bottom end of the support leg (12). The fixed seat (121) is fixedly installed on the external welding frame.
6. The laser calibration welding fixture for gate valve overlay welding according to claim 1, characterized in that: Multiple fixing rods (14) are fixedly installed on the top surface of the base plate (13), and a fixing plate (141) is fixedly installed at the top of the fixing rod (14). The fixing plate (141) is detachably installed on the bottom surface of the processing panel (1).
7. The laser calibration welding fixture for gate valve overlay welding according to claim 2, characterized in that: The front and left and right sides of the support frame (15) are connected to the outside world, and a control host (17) is provided on one side of the processing panel (1).
8. The laser calibration welding fixture for gate valve overlay welding according to claim 7, characterized in that: The bottom of the control host (17) is fixedly installed with a support rod (171), which is fixedly installed on the external frame.