A tool for welding a heat exchanger tube sheet ring weld

Abstract

This utility model discloses a tooling for welding the circumferential weld of a heat exchanger tube box, including a chuck base plate. At least three sliding support assemblies for supporting and fixing the end cap are arranged in a circular array around the center of the chuck base plate. Each sliding support assembly includes a guide rail base plate with a guide rail and a support that slides along the guide rail. The guide rail points towards the center of the chuck base plate. A lead screw is rotatably connected to the guide rail base plate via two bearing seats. The lead screw is connected to the support via a lead screw nut seat, and the support is connected to the end cap flange via a bolt and nut assembly. This utility model effectively achieves welding of the end cap and the tube box circumferential weld at a flat welding position, avoiding the need for temporary supports welded onto materials such as heat-resistant steel, stainless steel, and non-ferrous metals. It solves the problem of inconvenient fixation during welding of the end cap and the tube box circumferential weld, and is particularly suitable for tube boxes where temporary fixation by welding is not advisable, improving welding efficiency and quality.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger processing tooling technology, specifically a tooling for welding the circumferential weld seam of a heat exchanger tube box. Background Technology

[0002] To obtain a welded joint with good forming quality, the workpiece to be welded should be adjusted to a flat welding position as much as possible. For rotatable workpieces, the workpiece can be rotated while the welding gun is in a fixed position for welding. This is conducive to the automation of welding and the formation of a stable welded joint.

[0003] Commonly used roller frames are suitable for welding long cylindrical workpieces; chuck-type positioners can clamp workpieces such as pipes and flanges, but cannot clamp workpieces with elliptical ends; temporary welding fixation will damage the surface of the base material, especially for some heat-resistant steel, stainless steel, non-ferrous metals, etc. Temporary supports should be avoided as much as possible.

[0004] To address this issue, a tooling for welding the circumferential weld seam of the heat exchanger tube box is proposed to facilitate the welding of the circumferential weld seam of the heat exchanger tube box. Utility Model Content

[0005] The technical problem this utility model aims to solve is to overcome existing defects and provide a tooling for welding the circumferential weld of heat exchanger tube boxes. This tooling effectively enables the welding of the circumferential weld between the end cap and the cylindrical section in a flat welding position, avoiding the need to weld temporary supports on the surface of materials such as heat-resistant steel, stainless steel, and non-ferrous metals. It solves the problem of inconvenience in fixing the circumferential weld between the end cap and the cylindrical section of the heat exchanger tube box, and is especially suitable for tube boxes that are not suitable for temporary fixing by welding. This tooling improves the efficiency and quality of welding operations and can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tooling for welding the circumferential weld of a heat exchanger tube box, comprising a chuck base plate, wherein at least three sliding support assemblies for supporting and fixing the end cap are arranged in a circular array around the center of the chuck base plate. Each sliding support assembly includes a guide rail base plate, on which a guide rail is provided. A support is slidably fitted to the guide rail, and the guide rail points toward the center of the chuck base plate. A lead screw is rotatably connected to the guide rail base plate through two bearing seats. The lead screw is connected to the support through a lead screw nut seat, and the support is connected to the end cap flange through a bolt and nut assembly.

[0007] Preferably, the support is provided with an inclined positioning plate facing the center of the chuck base plate.

[0008] Preferably, the support is provided with a waist-shaped hole through which the bolts of the bolt and nut assembly pass.

[0009] Preferably, the guide rail base plate is fixedly connected to the chuck base plate by hex bolts.

[0010] Preferably, the support is provided with a slider adapted to the guide rail, and the slider is connected to the support by hex bolts.

[0011] Preferably, the support is provided with two sliders, and the guide rail base plate is provided with two parallel guide rails.

[0012] Preferably, the end of the lead screw away from the center of the chuck base plate is provided with an external hexagonal head.

[0013] Preferably, the support is threadedly connected with a locking bolt that abuts against the guide rail base plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: the support slides on the guide rail, and after the position is adjusted, it is fixed by locking bolts, which is suitable for tube boxes of different diameters; multiple supports are used to position the end cap, and the end cap abuts against the support through bolt and nut assembly, which effectively realizes the welding of the end cap and the circumferential weld of the tube box in the flat welding position. It can be used with automated welding equipment to avoid welding temporary supports on the surface of heat-resistant steel, stainless steel, non-ferrous metals and other materials, thus ensuring product quality; it solves the problem of inconvenience in fixing the end cap and the circumferential weld of the heat exchanger tube box, and is especially suitable for tube boxes that are not suitable for temporary fixing by welding, thus improving the efficiency and quality of welding operations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of another usage state of this utility model.

[0018] In the diagram: 1. Chuck base plate, 2. Slider, 3. Guide rail base plate, 4. Bearing seat, 5. Guide rail, 6. Lead screw, 7. Support, 8. Bolt and nut assembly, 9. Inclined positioning plate, 10. Oval hole. Detailed Implementation

[0019] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0020] Please see Figure 1-2 The present invention provides the following technical solution:

[0021] Example 1: A tooling for welding the circumferential weld of a heat exchanger tube box includes a chuck base plate 1. At least three sliding support assemblies for supporting and fixing the end cap are arranged in a circular array around the center of the chuck base plate 1. The sliding support assembly includes a guide rail base plate 3, a guide rail 5 is provided on the guide rail base plate 3, and a support 7 is slidably fitted on the guide rail 5. The guide rail 5 points to the center of the chuck base plate 1. A lead screw 6 is rotatably connected to the guide rail base plate 3 through two bearing seats 4. The lead screw 6 is connected to the support 7 through a lead screw nut seat. The support 7 is connected to the end cap flange through a bolt and nut assembly 8.

[0022] Understandably, by rotating the lead screw 6, the lead screw 6 drives the support 7 to move on the guide rail 5 through the lead screw nut seat. The support 7 is moved to the appropriate position according to the specifications of the end cap. The supports 7 of the three sliding support components are adjusted in sequence to ensure that the three supports 7 are aligned with the center of the chuck base plate 1. Then, the end cap is fixed to the support 7 with the bolt and nut group 8, which effectively realizes the welding of the end cap and the circumferential weld of the cylinder section in the flat welding position. It can be used with automated welding equipment to avoid welding temporary supports on the surface of heat-resistant steel, stainless steel, non-ferrous metals and other materials, ensuring product quality and solving the problem of inconvenience in fixing the end cap and the circumferential weld of the heat exchanger tube box during welding.

[0023] Example 2: Unlike Example 1, the support 7 is provided with an inclined positioning plate 9 facing the center of the chuck base plate 1, which abuts against the end cap positioning; the support 7 is provided with a waist-shaped hole 10 for the bolts of the bolt and nut assembly 8 to pass through, which can be used for fine adjustment of size; the guide rail base plate 3 is fixedly connected to the chuck base plate 1 by internal hex bolts, which is a detachable connection and is convenient for installation and fixing.

[0024] It should be noted that, as Figure 3 As shown, the end cap flange can also be directly fixed to the support 7 by bolt and nut assembly 8, and the end cap and cylinder section circumferential weld can be welded. The end cap can be clamped and positioned according to actual needs, making it flexible and convenient to use.

[0025] Example 3: Unlike Example 1, the support 7 is provided with a slider 2 that is adapted to the guide rail 5. The slider 2 is connected to the support 7 by an internal hex bolt. The support 7 is provided with two sliders 2, and the guide rail base plate 3 is provided with two parallel guide rails 5. Through the cooperation of the guide rails 5 and the sliders 2, the support 7 is ensured to move toward the center of the guide rail base plate 3.

[0026] In addition, the end of the lead screw 6 away from the center of the chuck base plate 1 is provided with an external hexagonal head, which makes it easy to turn the lead screw 6 with a wrench. The support 7 is threadedly connected with a locking bolt that abuts against the guide rail base plate 3. The support 7 is fixed by the locking bolt to prevent it from moving or misaligning after it is adjusted into place.

[0027] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents in the content of this utility model.

Claims

1. A tooling for welding circumferential welds in heat exchanger tube boxes, comprising a chuck base plate (1), characterized in that: The chuck base plate (1) has at least three sliding support components arranged in a circular array around its center for supporting and fixing the end cap. The sliding support components include a guide rail base plate (3), a guide rail (5) on the guide rail base plate (3), a support (7) slidably fitted on the guide rail (5), the guide rail (5) pointing towards the center of the chuck base plate (1), and a lead screw (6) rotatably connected to the guide rail base plate (3) through two bearing seats (4). The lead screw (6) is connected to the support (7) through a lead screw nut seat, and the support (7) is connected to the end cap flange through a bolt and nut assembly (8).

2. The tooling for welding the circumferential weld seam of a heat exchanger tube box according to claim 1, characterized in that: The support (7) is provided with an inclined positioning plate (9) facing the center of the chuck base plate (1).

3. The tooling for welding the circumferential weld seam of a heat exchanger tube box according to claim 1, characterized in that: The support (7) is provided with a waist-shaped hole (10) through which the bolts of the bolt and nut assembly (8) pass.

4. The tooling for welding the circumferential weld seam of a heat exchanger tube box according to claim 1, characterized in that: The guide rail base plate (3) is fixedly connected to the chuck base plate (1) by hex bolts.

5. The tooling for welding the circumferential weld seam of a heat exchanger tube box according to claim 1, characterized in that: The support (7) is provided with a slider (2) adapted to the guide rail (5), and the slider (2) is connected to the support (7) by an internal hex bolt.

6. The tooling for welding the circumferential weld seam of a heat exchanger tube box according to claim 5, characterized in that: The support (7) is provided with two sliders (2), and the guide rail base plate (3) is provided with two parallel guide rails (5).

7. The tooling for welding the circumferential weld seam of a heat exchanger tube box according to claim 1, characterized in that: The lead screw (6) has an external hexagonal head at one end away from the center of the chuck base plate (1).

8. The tooling for welding the circumferential weld seam of a heat exchanger tube box according to claim 1, characterized in that: The support (7) is threadedly connected with a locking bolt that abuts against the guide rail base plate (3).

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