Automatic welding machine for circular valve body
By combining a rotary table and a motor assembly, automatic concentricity compensation of the circular valve body and adaptive adjustment of the welding torch angle are achieved, solving the problems of unstable quality and low efficiency in traditional welding, and improving welding accuracy and equipment automation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN XINQIRUI MACHINERY EQUIPMENT MANUFACTURING CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional circular valve body welding relies on manual or semi-automatic equipment, resulting in unstable welding quality, low efficiency, lack of adaptive adjustment function, difficulty in accurately compensating for valve body size deviations and welding torch angle fixation, which affects sealing performance and structural strength.
The system employs components such as a rotary table, cylinder, telescopic rod, rotary motor, and linear motor to achieve automatic concentricity compensation of the valve body and adaptive adjustment of the welding torch angle. The cylinder drives the telescopic rod for centering, the rotary motor adjusts the angles of the rotary table and welding torch, and the linear motor moves the welding torch, ensuring welding accuracy and stability.
It improves welding precision and efficiency, achieves 360° welding of valve body without dead angles, adapts to complex welding processes, reduces the frequency of manual adjustment, and enhances automation and equipment versatility.
Smart Images
Figure CN224273829U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of valve welding equipment, specifically an automatic welding machine for circular valve bodies. Background Technology
[0002] Traditional welding of circular valve bodies relies primarily on manual operation or semi-automatic equipment, resulting in inconsistent weld quality and low efficiency. Manual welding requires frequent adjustments to the valve body to ensure uniform weld seams, leading to high labor intensity and defects such as misaligned welds and incomplete welds. Existing semi-automatic welding equipment typically lacks adaptive adjustment capabilities, making it difficult to accurately compensate for dimensional deviations or internal bore eccentricity, resulting in poor weld formation. Furthermore, the fixed welding torch angle cannot adapt to the welding requirements of complex weld seams, affecting sealing performance and structural strength. Therefore, there is an urgent need for a highly automated, adaptively adjustable valve body welding machine to improve welding accuracy and production efficiency.
[0003] A search revealed Chinese patent publication number CN219852957U, which discloses an automatic welding machine for circular valve bodies. The machine includes a main support frame, with a motor fixed inside the frame. The motor is connected to a guide support surface via a gear transmission assembly. The guide support surface and the main support frame are rotatably connected via bearings. The center of the valve internal support mechanism is fixed to the center of the guide support surface, and the support arm of the valve internal support mechanism is slidably connected to the opening groove of the guide support surface. A cylinder is fixed to the main support frame and pneumatically connected to the valve internal support mechanism. A welding torch adjustment mechanism is fixed to the main support frame. This invention solves the problems of inconsistent welding quality among different welders, high requirements for welders, and poor working conditions for welders in existing valve body welding processes.
[0004] However, although the device solves the problems of unstable welding quality and reliance on manual labor, it still has shortcomings: concentric adjustment relies solely on cylinder propulsion, which has limited precision; the welding torch angle needs to be manually pre-adjusted and cannot dynamically adapt to changes in the weld; the overall rigidity is insufficient, and high-speed rotation is prone to vibration, affecting the uniformity of the weld. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides an automatic welding machine for circular valve bodies, which solves the problems of existing devices lacking automatic concentricity compensation function and welding torch angle adaptive adjustment capability.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic welding machine for circular valve bodies, comprising a rotary table, a mounting table, and a mounting frame. The rotary table is positioned above the mounting table, and the mounting frame is fixedly connected to one side of the mounting table. A guide rail is provided at the upper end of the rotary table, and a movable plate is provided on the guide rail. A cylinder is fixedly connected to the upper end of the movable plate, and a telescopic rod is provided inside the cylinder. One end of the telescopic rod is fixedly connected to a support plate, which provides rigid support to prevent the valve body from shaking during welding and ensures uniform weld seams.
[0007] The valve body to be welded is placed on the moving plate and fitted with an internal cylinder. The cylinder is driven to extend the telescopic rod, which in turn extends the support plate laterally to quickly center the valve body blank. If there is an internal control deviation in the valve body blank, the second rotary motor is driven to rotate the lead screw. The rotation of the lead screw causes the moving plate to move along the lead screw axis, which can finely adjust the position of the mandrel to ensure that the valve body and the rotary table rotate concentrically, avoiding uneven welds caused by eccentricity during welding. The first rotary motor is driven to rotate the rotating column, which in turn drives the rotary table to rotate. The linear motor is driven to move the moving block, thereby adjusting the distance between the welding torch and the valve body blank. The third rotary motor is driven to rotate the rotating rod, thereby adjusting the angle between the welding torch and the valve body blank, flexibly adjusting the welding position of the welding equipment.
[0008] Preferably, a first rotating motor is fixedly connected to the lower outer wall of the mounting platform, the output shaft of the first rotating motor is fixedly connected to the rotation center of the rotating column, the upper end of the rotating column is fixedly connected to the rotating table, and the speed of the first motor is adjustable to adapt to different welding speed requirements.
[0009] Preferably, a mounting plate is fixedly connected to the upper outer wall of the rotating platform, and a second rotating motor is fixedly connected to one side of the mounting plate. The output shaft of the second rotating motor is fixedly connected to the rotation center of the lead screw. The lead screw is connected to the moving plate, and a threaded seat is provided on the lower outer wall of the moving plate. The thread of the threaded seat is engaged with the thread of the lead screw.
[0010] Preferably, a linear motor is fixedly connected to one side of the mounting bracket, and the output end of the linear motor is fixedly connected to the outer wall of one side of the moving block. The output shaft of the linear motor only performs lateral linear motion.
[0011] Preferably, the movable block is equipped with a welding device, the welding device is equipped with a welding torch, the welding torch is connected to a connecting pipe, the connecting pipe is fixedly connected to an installation cylinder, the installation cylinder is equipped with a rotating rod, the rotation center of the rotating rod is fixedly connected to a third rotating motor, the third rotating motor is fixedly connected to the outer wall of one side of the movable block, and the connecting pipe is connected to an external circuit. This is an existing device and will not be described in detail or illustrated here.
[0012] Preferably, a bracket is fixedly connected to the lower outer wall of the mounting platform, which increases the overall stability of the device.
[0013] This utility model provides an automatic welding machine for circular valve bodies. It has the following advantages:
[0014] 1. This automatic welding machine for circular valve bodies uses a rotary table to drive the valve body to rotate at a uniform speed, combined with a laterally adjustable pneumatic expansion mandrel, to achieve 360° welding of the valve body without dead angles. When there is an internal hole deviation in the valve body, the screw drive mechanism can precisely fine-tune the position of the support plate, automatically compensating for eccentricity errors and ensuring that the valve body and the rotary table are strictly concentric. During rotation, the first rotating motor controls the speed to be uniform and stable, avoiding uneven weld seams caused by speed fluctuations. This design effectively solves the problem of repeated manual adjustments for alignment in traditional welding, significantly improving the forming quality of circumferential weld seams, and is especially suitable for welding thin-walled valve bodies with high precision requirements.
[0015] 2. This automatic welding machine for circular valve bodies features a welding torch driven by a third rotary motor to rotate a shaft, allowing for flexible adjustment of the torch angle to meet the process requirements of flat welding, vertical welding, and bevel welding. A linear motor moves the welding torch laterally, combined with the linkage control of the rotary table, ensuring the torch remains perpendicular to the weld surface and preventing welding defects. The multi-degree-of-freedom adjustment design also avoids interference from valve body flanges or protruding structures, enabling one-time forming of complex welds. This function significantly reduces the frequency of manual torch adjustments, increases automation, and adapts to welding tasks for valve bodies of different specifications, enhancing the equipment's versatility. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the support plate structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the guide rail structure of this utility model;
[0019] Figure 4 This is a schematic diagram of the welding equipment structure of this utility model.
[0020] The attached diagram lists the components represented by each number as follows:
[0021] 1. Rotary table; 2. Mounting platform; 3. Mounting frame; 4. Linear motor; 5. Welding equipment; 6. First rotary motor; 7. Rotating column; 8. Bracket; 9. Support plate; 10. Telescopic rod; 11. Cylinder; 12. Lead screw; 13. Second rotary motor; 14. Mounting plate; 15. Third rotary motor; 16. Rotating rod; 17. Welding torch; 18. Mounting cylinder; 19. Connecting pipe; 20. Guide rail; 21. Moving plate; 22. Moving block. Detailed Implementation
[0022] 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.
[0023] Example 1
[0024] Please see Figure 1-4 This utility model provides an automatic welding machine for circular valve bodies, including a rotary table 1, a mounting table 2, and a mounting frame 3. The rotary table 1 is located above the mounting table 2, and the mounting frame 3 is fixedly connected to one side of the mounting table 2. A guide rail 20 is provided at the upper end of the rotary table 1, and a movable plate 21 is provided on the guide rail 20. A cylinder 11 is fixedly connected to the upper end of the movable plate 21, and a telescopic rod 10 is provided inside the cylinder 11. One end of the telescopic rod 10 is fixedly connected to a support plate 9. In use, the cylinder 11 drives the telescopic rod 10 to extend the support plate 9 laterally, so that the valve body blank is automatically centered, reducing manual adjustment time. The movable plate 21 can be adjusted on the guide rail 20. Combined with the cylinder 11 and the telescopic rod 10, it can be adapted to valve bodies with different inner diameters, improving versatility.
[0025] Example 2
[0026] Please see Figure 1-4 In this embodiment, a first rotating motor 6 is fixedly connected to the lower outer wall of the mounting platform 2. The output shaft of the first rotating motor 6 is fixedly connected to the rotation center of the rotating column 7. The upper end of the rotating column 7 is fixedly connected to the rotating platform 1. In use, the first rotating motor 6 drives the rotating platform 1 to rotate at a constant speed through the rotating column 7, so as to achieve continuous welding of the valve body without any breaks.
[0027] A mounting plate 14 is fixedly connected to the upper outer wall of the rotary table 1. A second rotary motor 13 is fixedly connected to one side of the mounting plate 14. The output shaft of the second rotary motor 13 is fixedly connected to the rotation center of the lead screw 12. The lead screw 12 is connected to the moving plate 21. In use, the lead screw 12 can precisely move the position of the support plate 9, correct the deviation of the valve body hole, and ensure the concentricity of rotation. The lead screw 12 is controlled by the second rotary motor 13, which replaces manual adjustment, improves efficiency and reduces human error.
[0028] A linear motor 4 is fixedly connected to one side of the mounting bracket 3. The output end of the linear motor 4 is fixedly connected to the outer wall of one side of the moving block 22. In use, the linear motor 4 quickly adjusts the distance between the welding torch 17 and the valve body to adapt to valve bodies of different diameters.
[0029] The movable block 22 is equipped with a welding device 5, which is equipped with a welding torch 17. The welding torch 17 is connected to a connecting pipe 19, and the connecting pipe 19 is fixedly connected to an installation cylinder 18. The installation cylinder 18 is equipped with a rotating rod 16, and the rotation center of the rotating rod 16 is fixedly connected to a third rotating motor 15. The third rotating motor 15 is fixedly connected to the outer wall of one side of the movable block 22. In use, the third rotating motor 15 can adjust the tilt angle of the welding torch 17 to meet the requirements of flat welding, vertical welding or bevel welding.
[0030] A bracket 8 is fixedly connected to the lower outer wall of the mounting platform 2. During use, the bracket 8 absorbs the mechanical vibration during welding and prevents the rotating platform 1 from shifting.
[0031] Instructions for use: When using this device, place the valve body to be welded on the moving plate 21 and insert the cylinder 11. Drive the cylinder 11 to make the telescopic rod 10 drive the support plate 9 to extend laterally and quickly center the valve body blank. If there is an internal control deviation in the valve body blank, drive the second rotary motor 13 to rotate the lead screw 12. The rotation of the lead screw 12 drives the moving plate 21 to move along the axis of the lead screw 12. The position of the mandrel can be finely adjusted to ensure that the valve body and the rotary table 1 rotate concentrically, avoiding uneven welds caused by eccentricity during welding. Drive the first rotary motor 6 to make the rotating column 7 drive the rotary table 1 to rotate. Drive the linear motor 4 to move the moving block 22, thereby adjusting the distance between the welding torch 17 and the valve body blank. Drive the third rotary motor 15 to make the rotating rod 16 rotate, thereby adjusting the angle between the welding torch 17 and the valve body blank, and flexibly adjusting the welding position of the welding equipment 5.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An automatic welding machine for circular valve bodies, comprising a rotary table (1), a mounting table (2), and a mounting frame (3), wherein the rotary table (1) is disposed above the mounting table (2), and the mounting frame (3) is fixedly connected to one side of the mounting table (2), characterized in that: The upper end of the rotary table (1) is provided with a guide rail (20), the guide rail (20) is provided with a moving plate (21), the upper end of the moving plate (21) is fixedly connected with a cylinder (11), the cylinder (11) is provided with a telescopic rod (10), one end of the telescopic rod (10) is fixedly connected to the support plate (9).
2. The automatic welding machine for valve bodies of circular valves according to claim 1, characterized in that: The lower outer wall of the mounting platform (2) is fixedly connected to a first rotating motor (6), the output shaft of the first rotating motor (6) is fixedly connected to the rotation center of the rotating column (7), and the upper end of the rotating column (7) is fixedly connected to the rotating platform (1).
3. The automatic welding machine for circular valve bodies according to claim 2, characterized in that: An mounting plate (14) is fixedly connected to the upper outer wall of the rotary table (1). A second rotating motor (13) is fixedly connected to one side of the mounting plate (14). The output shaft of the second rotating motor (13) is fixedly connected to the rotation center of the lead screw (12). The lead screw (12) is connected to the moving plate (21).
4. The automatic welding machine for a circular valve body according to claim 1, characterized in that: A linear motor (4) is fixedly connected to one side of the mounting bracket (3), and the output end of the linear motor (4) is fixedly connected to the outer wall of one side of the moving block (22).
5. The automatic welding machine for a circular valve body according to claim 4, characterized in that: The movable block (22) is equipped with a welding device (5), the welding device (5) is equipped with a welding torch (17), the welding torch (17) is connected to a connecting pipe (19), the connecting pipe (19) is fixedly connected to an installation cylinder (18), the installation cylinder (18) is equipped with a rotating rod (16), the rotation center of the rotating rod (16) is fixedly connected to a third rotating motor (15), and the third rotating motor (15) is fixedly connected to the outer wall of one side of the movable block (22).
6. The automatic welding machine for circular valve bodies according to claim 1, characterized in that: The mounting platform (2) has a bracket (8) fixedly connected to the lower outer wall.