Welding tool for air inlet flange

Abstract

The utility model relates to the technical field of flange welding, in particular to an air inlet flange welding tool which comprises a base. The vertical frame is fixedly mounted on the surface of the base; the first triangular chuck is rotationally connected to the side wall of the vertical frame and used for fixing the pipeline and enabling the pipeline and the first triangular chuck to be kept coaxial. The first triangular chuck and the second triangular chuck are connected through the telescopic piece and the symmetrical supporting piece, a three-point stable supporting structure is formed, it is guaranteed that the pipeline and the flange are strictly coaxial all the time in the clamping state, and the quality defect caused by welding eccentricity is effectively avoided; and the telescopic piece adopts the thread transmission design of the threaded rod and the spiral sleeve, the distance between the two chucks can be accurately adjusted, axial movement of the flange on the pipeline is achieved, the flange and the end of the pipeline can be conveniently and rapidly aligned, and the requirement for alignment or reserved welding allowance is met.

Description

Technical Field

[0001] This utility model relates to the field of flange welding technology, and in particular to a welding fixture for an air inlet flange. Background Technology

[0002] Flange welding is a process for connecting flanges to pipes, equipment, or other components. It involves melting welding materials or base materials at high temperatures to create a permanent bond between the flange and the connecting part. Its core purpose is to ensure the sealing, structural strength, and stability of the connection. It is widely used in piping systems, pressure vessels, and mechanical equipment.

[0003] Traditional tooling often uses simple clamps to fix pipes and flanges separately, lacking a reliable coaxial positioning mechanism. Pipe and flange are prone to axial misalignment during clamping, leading to weld eccentricity during welding, severely affecting weld quality and workpiece sealing performance. Alignment between the flange and pipe ends usually relies on manual measurement and repeated adjustments, which is cumbersome and difficult to control in terms of precision. Especially when welding allowance is required, traditional methods necessitate multiple disassemblies and measurements, resulting in low production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a welding fixture for an air inlet flange, which solves the problem of inconvenient adjustment of welding precision between the flange and the pipeline in the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A welding fixture for an air intake flange includes a base; a stand fixedly mounted on the surface of the base; a first triangular chuck rotatably connected to the side wall of the stand for fixing a pipe and keeping the pipe and the first triangular chuck coaxial; a second triangular chuck for fixing the flange and keeping the flange and the pipe coaxial, the surface of the first triangular chuck being provided with a telescopic component and a support component, the second triangular chuck being connected to the first triangular chuck through the telescopic component and the support component; and a driving component mounted on the surface of the stand for driving the first triangular chuck to rotate.

[0007] Preferably, the telescopic component includes a sleeve, a spiral sleeve, and a threaded rod. The threaded rod is slidably inserted inside the sleeve, the spiral sleeve is rotatably connected to the end of the sleeve, and the threaded rod and the spiral sleeve are threadedly connected. The ends of the sleeve and the threaded rod that are far apart from each other are respectively fixed to a first triangular chuck and a second triangular chuck.

[0008] Preferably, the support member is in two sets, and the support member includes a sliding sleeve and a sliding rod. The sliding rod is slidably inserted inside the sliding sleeve, and the ends of the sliding sleeve and the sliding rod that are far apart from each other are respectively fixed to the first triangular chuck and the second triangular chuck.

[0009] Preferably, the driving component includes a motor, a gear, and a gear ring, wherein the gear and the output shaft of the motor are fixed, the gear ring is fixedly sleeved on the surface of the first triangular chuck, and the motor and the upright are fixedly connected.

[0010] Preferably, a through hole is provided at the center of the surface of both the first triangular chuck and the second triangular chuck, and a first claw and a second claw are respectively provided on the first triangular chuck and the second triangular chuck, and both the first claw and the second claw are lengthened.

[0011] Preferably, the end of the second claw is provided with a groove for contacting the arc-shaped surface and end face of the flange.

[0012] Preferably, the surface of the upright is provided with an auxiliary rod, which is composed of a round rod and a long plate. The long plate is welded to the end of the round rod, and the round rod moves through the upright.

[0013] This utility model has at least the following beneficial effects:

[0014] By setting up a first triangular chuck and a second triangular chuck connected by a telescopic component and symmetrical support components, a three-point stable support structure is formed, ensuring that the pipe and flange always remain strictly coaxial in the clamping state, effectively avoiding quality defects caused by welding eccentricity. Moreover, the telescopic component adopts a threaded rod and screw sleeve threaded transmission design, which can precisely adjust the distance between the two chucks to realize the axial movement of the flange on the pipe, which facilitates quick alignment of the flange and the pipe end, meeting the requirements of flush or leaving welding allowance.

[0015] The adjustable auxiliary rod on the side of the stand abuts against the end face of the pipe to be welded via a long plate. With the help of the telescopic component, it can quickly achieve a precise fit between the flange and the end of the pipe, eliminating the need for traditional measurement steps, improving assembly efficiency, and the auxiliary rod can be rotated and stored to avoid interfering with the welding operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This utility model Figure 1 Side view;

[0019] Figure 3 This is a schematic diagram of the second triangular chuck structure of this utility model;

[0020] Figure 4 This utility model Figure 3 Schematic diagram of the structure at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the telescopic component structure of this utility model.

[0022] In the diagram: 1. Base; 2. Stand; 3. Drive component; 31. Motor; 32. Gear; 33. Gear ring; 4. First triangular chuck; 41. First jaw; 5. Second triangular chuck; 51. Second jaw; 6. Telescopic component; 61. Sleeve; 62. Spiral sleeve; 63. Threaded rod; 7. Support component; 71. Sliding sleeve; 72. Sliding rod; 8. Auxiliary rod. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that provides control.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Reference Figure 1-5 A welding fixture for an air intake flange includes a base 1; a stand 2, which is fixedly installed on the surface of the base 1; a first triangular chuck 4, which is rotatably connected to the side wall of the stand 2 for fixing a pipe and keeping the pipe and the first triangular chuck 4 coaxial; a second triangular chuck 5 for fixing the flange and keeping the flange and the pipe coaxial, wherein the surface of the first triangular chuck 4 is provided with a telescopic member 6 and a support member 7, and the second triangular chuck 5 is connected to the first triangular chuck 4 through the telescopic member 6 and the support member 7; and a driving member 3, which is installed on the surface of the stand 2 for driving the first triangular chuck 4 to rotate.

[0029] The base 1 serves as the foundation component, providing stable support for the entire fixture. The upright 2 is fixed to the base 1, providing installation positions for other components. The first triangular chuck 4 is rotatably connected to the side wall of the upright 2, securing the pipe through its own structure and ensuring that the pipe's axis coincides with that of the first triangular chuck 4. The second triangular chuck 5 is used to fix the flange, connected to the first triangular chuck 4 via the telescopic component 6 and the support component 7, thereby ensuring that the flange and the pipe remain coaxial. The drive component 3 is mounted on the surface of the upright 2, driving the first triangular chuck 4 to rotate, causing the pipe fixed on it to rotate as well, facilitating welding operations. In specific operation, the pipe is first passed through the first triangular chuck 4 and the second triangular chuck 5, then the pipe is fixed using the first triangular chuck 4. At this time, the flange is fitted onto the end of the pipe, and the second triangular chuck 5 is used to fix the flange, ensuring that the flange and the pipe are coaxial after fixing.

[0030] Furthermore, the telescopic component 6 includes a sleeve 61, a helical sleeve 62, and a threaded rod 63. The threaded rod 63 is slidably fitted inside the sleeve 61, and the helical sleeve 62 is rotatably connected to one end of the sleeve 61, with the external thread of the threaded rod 63 engaging with the internal thread of the helical sleeve 62. The other end of the sleeve 61 is fixed to the first triangular chuck 4, and the free end of the threaded rod 63 is fixed to the second triangular chuck 5.

[0031] When the screw sleeve 62 is rotated, the threaded rod 63 moves linearly within the sleeve 61 due to the action of the thread, thereby changing the distance between the first triangular chuck 4 and the second triangular chuck 5, which are connected to the opposite ends of the sleeve 61 and the threaded rod 63. The fixed flange is moved on the pipeline using the telescopic component 6, allowing adjustment of the flange's position so that its end is flush with or slightly extends beyond the pipeline end to facilitate welding. Furthermore, because both the flange and the pipeline are fixed, the welding is more precise.

[0032] Furthermore, the support members 7 are configured in two sets, symmetrically distributed on both sides of the telescopic member 6. Each set of support members 7 includes a sliding sleeve 71 and a sliding rod 72, with the sliding rod 72 slidably fitted inside the sliding sleeve 71. One end of the sliding sleeve 71 is fixed to the first triangular chuck 4, and the free end of the sliding rod 72 is fixed to the second triangular chuck 5. The two sets of support members 7, together with the telescopic member 6, constitute a stable three-point support structure, ensuring that the first and second triangular chucks 5 maintain coaxiality during movement.

[0033] The structure and quantity of the support member 7 provide auxiliary support for the connection between the first triangular chuck 4 and the second triangular chuck 5, ensuring the stability and coaxiality of the connection. When the telescopic member 6 adjusts the distance between the first triangular chuck 4 and the second triangular chuck 5, the slide rod 72 slides within the sliding sleeve 71. At the same time, the support member 7 can limit the relative position of the first triangular chuck 4 and the second triangular chuck 5 to prevent offset and ensure their coaxiality. The support member 7 can provide support for the second triangular chuck 5 and the flange.

[0034] Furthermore, the driving component 3 includes a motor 31, a gear 32, and a gear ring 33. The motor 31 is fixed to the side of the support frame 2 by a bracket, and its output shaft is coaxially connected to the gear 32. The gear ring 33 is fitted and fixed to the outer periphery of the first triangular chuck 4, and the gear 32 meshes with the gear ring 33. When the motor 31 starts, the output shaft drives the gear 32 to rotate. Through the meshing transmission between the gear 32 and the gear ring 33, the first triangular chuck 4 is driven to rotate around its axis. The motor 31 is a 750W rated power servo motor 31, equipped with an encoder to achieve 0.1° accuracy control, and the speed is reduced to an adjustable range of 5-30 rpm by a reducer.

[0035] When motor 31 starts, the output shaft of motor 31 drives gear 32 to rotate. Gear 32 meshes with gear ring 33, thereby driving gear ring 33 and the first triangular chuck 4 fixed thereto to rotate, providing power for the rotation of the first triangular chuck 4, thereby driving the pipe to rotate, facilitating circumferential welding. It is worth noting that the circumferential welding here is for the flange and the end of the pipe, which can be directly circumferentially welded. For the weld position on the other side, the second triangular chuck 5 needs to be moved away from the flange to perform circumferential welding. Gear 32 and gear ring 33 adopt 20CrMnTi carburizing and quenching process, with a tooth surface hardness of HRC58-62, module m=4, and the number of teeth are 20 and 80 respectively, with a transmission ratio of 1:4 to ensure smooth torque transmission.

[0036] Both the first triangular chuck 4 and the second triangular chuck 5 adopt a three-jaw structure, with an extended first jaw 41 and a second jaw 51 respectively. The extended design of the first jaw 41 increases the contact area with the pipe and improves clamping stability; the end of the second jaw 51 is machined with a groove that matches the outer contour of the flange. The inner surface of the groove can simultaneously conform to the arc surface and end face of the flange, improving clamping accuracy through multi-point contact and ensuring that the flange and the pipe are strictly coaxial.

[0037] The central through hole facilitates pipe passage, the extended first jaw 41 can better fix the pipe and enhance the fixing effect, and the extended second jaw 51 can better clamp the flange.

[0038] Furthermore, the support frame 2 is equipped with an adjustable auxiliary rod 8 on its side, which includes a round rod and a long plate welded to the end of the round rod. The round rod moves through the support frame 2, allowing for both sliding and rotation. After the pipe and flange are fixed, the auxiliary rod 8 is pushed to make the long plate abut against the end face of the pipe to be welded. Then, the position of the second triangular chuck 5 is adjusted by the telescopic component 6 until the end face of the flange is completely in contact with the long plate, thereby quickly achieving precise alignment between the flange and the pipe end without additional measurement. When not in use, the long plate can be rotated downwards without affecting the welding operation.

[0039] In summary, the pipe is inserted from the outside of the support frame 2 into the central through hole of the first triangular chuck 4 and the second triangular chuck 5.

[0040] The three-jaw mechanism of the first triangular chuck 4 is activated, and the extended first jaw 41 clamps the outer wall of the pipe, ensuring that the pipe axis is strictly coaxial with the axis of the first triangular chuck 4.

[0041] The flange is fitted onto the end of the pipe to be welded. The second triangular chuck 5 is slowly moved closer to the flange. The outer contour of the flange is clamped by the second jaw 51 with a groove at the end. Coaxial centering of the flange and the pipe is achieved through multi-point contact.

[0042] Observe the relative position of the flange end face and the pipe end, and make preliminary adjustments to achieve approximate alignment.

[0043] Slide and rotate the round rod of auxiliary rod 8 to move the long plate to the end face of the pipe to be welded. Push auxiliary rod 8 to make the long plate fit tightly against the end face of the pipe.

[0044] The spiral sleeve 62 of the rotating telescopic component 6 drives the threaded rod 63 to move axially within the sleeve 61, thereby moving the second triangular chuck 5 and the flange along the pipeline axis until the flange end face is completely in contact with the long plate, achieving precise alignment.

[0045] Start the servo motor 31, which drives the first triangular chuck 4 to rotate at a constant speed of 5-30 rpm through the gear 32 and gear ring 33 transmission system, causing the pipeline to rotate synchronously.

[0046] For the circumferential weld between the flange and the pipe end, the welding operation is carried out directly; if it is necessary to weld the weld on the other side, the second triangular chuck 5 is moved back by the expansion joint 6 to avoid the welding area before welding is carried out.

[0047] During the welding process, the rotation speed stability can be monitored in real time by an encoder to ensure uniform weld seam.

[0048] 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 principles of this 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 claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for an air inlet flange, characterized in that, Including the base (1); The support frame (2) is fixedly installed on the surface of the base (1); The first triangular chuck (4) is rotatably connected to the side wall of the stand (2) to fix the pipe and keep the pipe and the first triangular chuck (4) coaxial. The second triangular chuck (5) is used to fix the flange and keep the flange and the pipe coaxial. The surface of the first triangular chuck (4) is provided with a telescopic member (6) and a support member (7). The second triangular chuck (5) is connected to the first triangular chuck (4) through the telescopic member (6) and the support member (7). The driving component (3), which is mounted on the surface of the stand (2), is used to drive the first triangular chuck (4) to rotate.

2. The welding fixture for an air inlet flange according to claim 1, characterized in that, The telescopic component (6) includes a sleeve (61), a spiral sleeve (62), and a threaded rod (63). The threaded rod (63) is slidably inserted inside the sleeve (61). The spiral sleeve (62) is rotatably connected to the end of the sleeve (61), and the threaded rod (63) and the spiral sleeve (62) are threadedly connected. The ends of the sleeve (61) and the threaded rod (63) that are far apart from each other are fixed to the first triangular chuck (4) and the second triangular chuck (5), respectively.

3. The welding fixture for an air inlet flange according to claim 2, characterized in that, The support member (7) consists of two sets, including a sliding sleeve (71) and a sliding rod (72). The sliding rod (72) is slidably inserted inside the sliding sleeve (71). The ends of the sliding sleeve (71) and the sliding rod (72) that are far apart from each other are respectively fixed to the first triangular chuck (4) and the second triangular chuck (5).

4. The welding fixture for an air inlet flange according to claim 1, characterized in that, The drive unit (3) includes a motor (31), a gear (32) and a gear ring (33). The output shaft of the gear (32) and the motor (31) are fixed. The gear ring (33) is fixedly sleeved on the surface of the first triangular chuck (4). The motor (31) and the stand (2) are fixedly connected.

5. The welding fixture for an air inlet flange according to claim 1, characterized in that, The first triangular chuck (4) and the second triangular chuck (5) are provided with through holes at the center of their surfaces. The first triangular chuck (4) and the second triangular chuck (5) are respectively provided with a first claw (41) and a second claw (51). The first claw (41) and the second claw (51) are both lengthened.

6. The welding fixture for an air inlet flange according to claim 5, characterized in that, The end of the second claw (51) is provided with a groove for contacting the flange arc surface and end face.

7. The welding fixture for an air inlet flange according to claim 5, characterized in that, The surface of the upright frame (2) is provided with an auxiliary rod (8), which is composed of a round rod and a long plate. The long plate is welded to the end of the round rod, and the round rod moves through the upright frame.

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