Positioning tool for welding pipe fitting and plane piece

Abstract

The utility model relates to the technical field of welding tools, in particular to a positioning tool for welding a pipe fitting and a plane piece, and the positioning tool realizes high-precision alignment, self-adaptive clamping and rotary welding through the synergistic effect of a plane piece positioning assembly and a pipe fitting positioning assembly. The device is compact in structure, convenient to operate, capable of remarkably improving the welding quality and efficiency and suitable for various industrial fields.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, specifically to a positioning fixture for welding pipe fittings and flat parts, which is particularly suitable for applications requiring high-precision alignment and rotary welding. Background Technology

[0002] In the welding process of pipe fittings and flat parts (such as plates, flanges, etc.), traditional tooling suffers from low positioning accuracy and poor adjustment efficiency. For example, misalignment easily occurs when aligning pipe fittings and flat parts, resulting in uneven welds. Existing technologies mostly employ manual clamping or fixed positioning structures, which have low positioning accuracy, are difficult to adapt to workpieces of different specifications, lack rotation capabilities, and have low welding efficiency. Therefore, there is an urgent need for a tooling that can achieve rapid and accurate positioning, self-adaptive clamping, and rotational adjustment. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a positioning fixture that can automatically clamp pipe fittings, accurately align planar parts, and support rotary welding, so as to improve welding accuracy and efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A positioning fixture for welding pipe fittings and flat parts, which achieves rotational positioning of the flat part through a flat part positioning component and adaptive clamping and release of the pipe fitting through a pipe fitting positioning component. The specific structure includes:

[0006] Flat part positioning assembly: includes a chuck, a flat part positioning block, a flat part locking component, and a rotary drive component; wherein, the chuck drives the flat part positioning block to rotate through the rotary drive component, and the flat part is fixed to the flat part positioning block through the flat part locking component.

[0007] Pipe positioning assembly: includes an arc-shaped component, a wedge-shaped component, an elastic component, and a linear drive component; the linear drive component pushes the wedge-shaped component to move axially, and the arc-shaped component expands radially by being squeezed by the inclined surface, thereby pressing against the inner wall of the pipe fitting; the elastic component drives the arc-shaped component to reset when the linear drive component retracts, achieving rapid release.

[0008] Preferably, the rotary drive component is a servo motor, a stepper motor, or a hydraulic motor.

[0009] Preferably, the linear drive component is a pneumatic cylinder, an electric push cylinder, or a lead screw transmission mechanism.

[0010] Preferably, the elastic element is a helical spring, a butterfly spring, or an elastic rubber pad.

[0011] Preferably, the diameter of the positioning hole on the flat part that mates with the pipe is 0.1-1 mm smaller than the outer diameter of the pipe.

[0012] Preferably, the chuck is a three-jaw chuck or a four-jaw chuck, and the jaws are provided with anti-slip textures.

[0013] Preferably, the arc-shaped component is a multi-segment split structure, evenly distributed along the circumference of the pipe.

[0014] Preferably, the inclination angle of the wedge-shaped member is 15°-45°.

[0015] Preferably, the planar positioning block is detachably connected to the chuck.

[0016] Preferably, the positioning fixture further includes a position sensor for detecting the radial position of the arc-shaped component and feeding it back to the control system.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. Adaptive clamping: The combination of arc-shaped and wedge-shaped parts can adapt to the clamping of pipe fittings of different diameters without the need for manual adjustment.

[0019] 2. High-precision alignment: The cooperation between the planar component positioning assembly and the tubular component positioning assembly ensures high alignment accuracy.

[0020] 3. Rotary welding: The chuck drives the flat parts to rotate, which facilitates continuous welding at multiple angles and reduces welding defects.

[0021] 4. High expandability: By replacing the arc-shaped parts and adjusting the limiting groove, it can be adapted to workpieces of various specifications. Attached Figure Description

[0022] Figure 1 According to some embodiments of the present invention, a schematic diagram of a positioning fixture for welding pipe fittings and planar parts is shown;

[0023] Figure 2 According to some embodiments of the present invention, a cross-sectional view of the positioning fixture is shown;

[0024] Figure 3 According to some embodiments of the present invention, a structural schematic diagram of a pipe positioning assembly is shown;

[0025] Figure 4 According to some embodiments of the present invention, it is shown that Figure 2 A magnified view of part C in the middle. Detailed Implementation

[0026] The technical features and advantages of this application will be described in more detail below with reference to the accompanying drawings, so that the advantages and features of this application can be more easily understood by those skilled in the art, thereby making a clearer and more explicit definition of the scope of protection of this invention.

[0027] It should be noted that in the description of this application, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0028] The terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the importance of the technical features shown.

[0029] Furthermore, it should be noted that, in the description of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] The embodiments of the present invention provide a positioning fixture for welding pipe fittings and flat parts, which can automatically clamp the pipe fittings, accurately align the flat parts, and support rotational welding, thereby improving welding accuracy and efficiency.

[0031] Please see Figures 1-4 This is a schematic diagram of the positioning fixture. The fixture uses a planar component positioning assembly to achieve rotational positioning of the planar component, and a pipe component positioning assembly to achieve adaptive clamping and release of the pipe component. The specific structure includes:

[0032] The planar part positioning assembly includes a chuck 1, a planar part positioning block 2, a planar part locking component 3, and a rotary drive component 4. The chuck 1 is connected to the rotary drive component 4. The planar part positioning block 2 is fixed on the chuck 1. The rotary drive component 4 can drive the chuck 1 to rotate, thereby driving the planar part positioning block 2 to rotate. The planar part A is fixed on the planar part positioning block 1 by the planar part locking component 3, and thus rotates around the axis under the drive of the rotary drive component 4.

[0033] Pipe positioning assembly: includes an arc-shaped component 5, a wedge-shaped component 6, an elastic component 7, and a linear drive component 8; the outer diameter of the arc-shaped component 5 is designed to match the inner diameter of the pipe B; the wedge-shaped component 6 is connected to the linear drive component 8 to achieve linear movement along the axial direction of the pipe B; the wedge-shaped component 6 and the arc-shaped component 5 form an inclined surface fit; the linear drive component 8 pushes the wedge-shaped component 6 to move axially, and the inclined surface squeezes the arc-shaped component 5 to expand radially outward, thereby pressing against the inner wall of the pipe B and fixing the pipe B; the elastic component 7 drives the arc-shaped component 5 to reset when the linear drive component 8 retracts, thereby achieving rapid release.

[0034] The specific structural details are as follows:

[0035] When the planar part positioning block 2 is a circular part, the chuck 1 can be a three-jaw chuck or a four-jaw chuck. The planar part positioning block 2 is fixed by the jaws, and the surface of the jaws can be designed with anti-slip texture. Alternatively, when the planar part positioning block 1 is a square part, the chuck 1 can be a circular plate. The planar part positioning block 1 can be fixed to the chuck 1 by bolts or other detachable connection methods. The shape of the planar positioning block 2 is designed according to the shape and structure of the planar part A.

[0036] The planar component positioning block 2 is made of hardened steel and has a through positioning hole 201 in the center. The hole diameter is slightly larger than the outer diameter of the pipe B and is used to install the pipe positioning assembly. A limiting groove can be provided on the side to position the planar component A. The planar component positioning block 2 and the chuck 1 are detachably connected, for example, by bolts, so that a suitable planar component positioning block 2 can be replaced according to the structure of the planar component A, thereby improving the versatility of this embodiment.

[0037] In this embodiment, two planar locking components 3 are designed and arranged opposite to each other, respectively on both sides of the planar positioning block 2, to achieve stable clamping of planar component A. The planar locking component 3 includes a handle 301, a fixed bracket 302, and a push rod 303. The fixed bracket 302 is fixedly mounted on the chuck 1. One end of the handle 301 is hinged to the fixed bracket 302, and the middle part is hinged to the push rod 303. By rotating the handle 301, the push rod 303 is moved to achieve clamping of planar component A.

[0038] The rotary drive component 4 can be a servo motor, stepper motor, or hydraulic motor, used to drive the chuck 1 to rotate, thereby achieving rotary welding.

[0039] The arc-shaped component 5 can be composed of multiple arc-shaped blocks (in this embodiment, two arc-shaped blocks are designed to be arranged opposite each other). The outer arc surface 501 of the arc-shaped component 5 forms a fit with the outer wall of the pipe B. An anti-slip coating can be provided on the arc surface 501. The interior of the arc-shaped component 5 is designed with a concave inclined surface 502, which is used to form an inclined fit with the wedge-shaped component 6. The initial state of the arc-shaped component 5 is a contracted shape, and after it expands outward, it is in close contact with the inner wall of the pipe B.

[0040] The wedge-shaped part 6 has a 30° inclined surface 601 at the front end, which cooperates with the concave inclined surface 502 of the arc-shaped part 5, and moves back and forth by the drive of the linear drive part 8.

[0041] The elastic element 7 can be a helical spring, a butterfly spring, or an elastic rubber pad, used to drive the arc-shaped element 5 to reset when the linear drive element 8 retracts. In this embodiment, the elastic element 7 is a helical spring, and a hook 502 is designed on the arc-shaped element 5.

[0042] The linear drive component 8 can be a pneumatic cylinder, an electric push cylinder, or a lead screw transmission structure, used to drive the wedge component 6 to achieve axial linear movement along the positioning hole 201.

[0043] A positioning hole is designed on the flat part A to mate with the pipe part B. The diameter of the positioning hole is designed to be 0.1-1mm smaller than the outer diameter of the pipe part B. This design forms a flat weld during welding, thereby ensuring the welding quality.

[0044] The positioning fixture of this invention operates on the following principle:

[0045] Clamping steps:

[0046] 1. Insert the flat part A into the flat part positioning block 2, position it through the limiting groove, and then rotate the handle 301 to lock and fix it through the flat part locking part 3.

[0047] 2. Insert pipe B into the center hole 201 of the flat positioning block 2, start the linear drive 8 to push the wedge 6 forward, so that the arc 5 expands outward to clamp pipe B.

[0048] 3. Start the rotary drive component 4 to rotate the flat component A for welding.

[0049] Release steps:

[0050] The linear drive component 8 retracts, the elastic component 7 pulls the arc-shaped component 5 to reset, and the tube component B can be easily removed.

[0051] In this embodiment, the positioning fixture is designed so that the pipe B is fixed and does not need to be rotated. For pipe B that is long, the end away from the positioning fixture can be designed with a cylinder and a push rod for auxiliary fixing. A support roller is designed at the bottom along the length of the pipe B to ensure clamping stability.

[0052] Application scenarios of this invention include, but are not limited to:

[0053] 1. Automotive exhaust pipe welding: Suitable for butt welding of flanges and pipes.

[0054] 2. Chemical pipeline installation: Used for circumferential welding of flanges and pipe fittings.

[0055] 3. Mechanical manufacturing: Welding of metal pipes and panels.

[0056] Furthermore, in an alternative embodiment, the rotary drive 4 can be replaced with a manual crank, suitable for environments without power. The elastic element 7 can be a nitrogen spring instead of a mechanical spring to improve the reset speed. Additionally, a pressure sensor can be added to monitor the clamping force of the arc-shaped element 5 in real time and feed it back to the control system. Example 1

[0057] Taking the welding of DN50 stainless steel pipe and flange as an example:

[0058] 1. Select the arc-shaped part 5 and the flat part positioning block 2 that are compatible with DN50.

[0059] 2. Insert the flange (flat part A) into the flat part positioning block 2 and lock it.

[0060] 3. Insert the stainless steel pipe (fitting B) into the center hole 201, start the pneumatic cylinder to push the wedge 6 forward by 10mm, and the arc-shaped part 5 expands outward to clamp.

[0061] 4. Start the servo motor to rotate at 5r / min to perform TIG welding, ensuring uniform weld seams without deviation.

[0062] In the description of this specification, references to terms such as "some embodiments," "some examples," "exemplarily," "example," "preferred," or "further" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A positioning tool for welding a pipe member to a flat member, characterized by, The utility model relates to a kind of pipe and plane positioning device, including: Plane piece positioning assembly, including chuck (1), plane piece positioning block (2), plane piece locking piece (3) and rotary drive (4);The chuck (1) is drivingly connected with rotary drive (4), the plane piece positioning block (2) is fixed on chuck (1), and plane piece (A) is fixed on plane piece positioning block (2) by the plane piece locking piece (3), and can rotate around axis under the driving of rotary drive (4); Pipe piece positioning assembly is arranged along the inside of the plane piece positioning block (2) and includes arc piece (5), wedge piece (6), elastic piece (7) and straight line drive (8);The arc piece (5) is adapted to the inner diameter of pipe piece (B), the wedge piece (6) is drivingly connected with straight line drive (8), to realize linear movement in the axial direction of pipe piece (B), the wedge piece (6) and arc piece (5) form inclined surface cooperation between, so that the arc piece (5) expands radially when wedge piece (6) linearly moves to tightly fix pipe piece (B), the elastic piece (7) is used to drive the arc piece (5) reset.

2. The positioning fixture of claim 1, wherein: The rotary drive (4) is servo motor, stepper motor or hydraulic motor.

3. The positioning tool of claim 1, wherein: The straight line drive (8) is pneumatic cylinder, electric push cylinder or screw transmission mechanism.

4. The positioning fixture of claim 1, wherein: The elastic piece (7) is helical spring, butterfly spring or elastic rubber pad.

5. The positioning fixture of claim 1, wherein: The hole diameter of the positioning hole on the plane piece (A) cooperating with the pipe piece (B) is less than the outer diameter of the pipe piece (B) by 0.1-1mm.

6. The positioning fixture of claim 1, wherein: The chuck (1) is three-jaw chuck or four-jaw chuck, and anti-skid lines are provided on chuck jaw.

7. The positioning fixture of claim 1, wherein: The arc piece (5) is multi-section split structure, and is evenly distributed along the circumference of pipe piece (B).

8. The positioning fixture of claim 1, wherein: The inclination angle of the inclined surface of the wedge piece (6) is 15°-45°.

9. The positioning fixture of claim 1, wherein: The plane piece positioning block (2) and the chuck (1) are detachably connected.

10. The positioning fixture of any one of claims 1-9, wherein: It also includes a position sensor for detecting the radial position of the arc piece (5) and feeding back to the control system.

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