An auxiliary tool for welding of large diesel engine spliced pipe

Abstract

An auxiliary tooling for welding large diesel engine splice pipes includes: a tooling pipe made of high-strength seamless steel pipe; a first flange welded to one end of the tooling pipe, the flange end face having an annular positioning groove; a second flange welded to the other end of the tooling pipe; and an adjusting support assembly consisting of multiple U-shaped supports evenly distributed around the first flange to form an annular support structure. In daily welding, due to the large number of splice pipes and the unchanging operation of on-site personnel, welding quality and efficiency cannot be guaranteed. This tooling is designed to reduce on-site labor intensity and increase production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of welding of large diesel engine splice pipes, and specifically relates to an auxiliary tooling for welding large diesel engine splice pipes, which is particularly suitable for butt weld operations of large-diameter splice pipes in marine diesel engine piping systems. Background Technology

[0002] Shipbuilding is a massive and complex engineering project, and welding technology plays a vital role in its development. Standardized, scientific, and thorough welding work has a positive impact on the overall structural performance of a ship. Currently, welding time accounts for approximately 40% of the entire shipbuilding cycle, and welding costs account for about 40% of the hull construction cost. It not only significantly affects the quality of the hull structure but also plays a crucial role in reducing costs, improving efficiency, and shortening the shipbuilding cycle throughout the entire process.

[0003] With the increasing number of pipes in the diesel engine piping system, on-site workers can only weld on the ground, which is very inconvenient. Therefore, solving the welding of splicing pipes has become a major problem that urgently needs to be addressed.

[0004] This invention improves the tooling, enabling on-site employees to perform upright welding during the welding process, reducing quality and safety hazards caused by inconvenient posture. Summary of the Invention

[0005] The purpose of this invention is to simplify and streamline welding by using a fixture, while providing sufficient space to prevent interference with the welding torch during the welding process. Furthermore, the fixture is compatible with pipe diameters of various sizes, reducing frequent changes and ensuring the straightness of the main pipe after welding. This reduces the workload of on-site workers, avoids affecting pipe quality, and prevents wasted time.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An auxiliary tooling for welding splicing pipes of large diesel engines, characterized in that it includes:

[0008] The tooling tubing is made of high-strength seamless steel pipe;

[0009] The first flange is welded and fixed to one end of the tooling pipe, and an annular positioning groove is machined on the flange end face;

[0010] The second flange is welded and fixed to the other end of the tooling pipe.

[0011] The adjustment bracket assembly consists of multiple U-shaped brackets evenly distributed along the circumference of the first flange to form a ring support structure.

[0012] Furthermore, the adjustable support assembly consists of eight U-shaped supports welded at 45° intervals to the end face of the first flange, forming a 360° annular support structure.

[0013] Furthermore, the cross-section of the annular positioning groove is trapezoidal, with a bottom width of 12mm, an opening width of 15mm, and a depth of 3mm, forming an interference fit with the flange of the splicing pipe flange.

[0014] Furthermore, the second flange has a 360° rotation function, which is used to achieve fine axial adjustment of the pipe fitting.

[0015] The beneficial effects of this utility model are: the splicing pipe is placed on the designed tooling, and during manufacturing, the pipe flange can be easily inserted into the fixed flange bracket without the need to use a crane to lift the pipe or to weld on the ground, thus improving the efficiency of splicing pipe manufacturing, increasing the safety factor of the support frame, and preventing safety accidents during production. The spatial positioning mechanism formed by the first and second flanges enables precise adjustment of the pipe fitting in the X / Y / Z axes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the auxiliary tooling used for welding splicing pipes of large diesel engines according to this utility model. Detailed Implementation

[0017] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can fully understand and implement the technical solution of this utility model.

[0018] Please see Figure 1 , Figure 1 This is a schematic diagram of the auxiliary tooling for welding large diesel engine splicing pipes according to this utility model, as shown in the figure, including:

[0019] Tooling pipe 1 is made of high-strength seamless steel pipe, and its length is customized according to the operation requirements;

[0020] The first flange 2 is welded and fixed to one end of the tooling pipe 1, and the flange end face is machined with an annular positioning groove 21;

[0021] The second flange 3 is welded and fixed to the other end of the tooling pipe 1;

[0022] Adjustable bracket group 4 consists of 8U-shaped brackets evenly distributed along the circumference of the first flange, with a spacing of 45° in this embodiment.

[0023] Implementation method:

[0024] Step 1: Pre-assembly of tooling

[0025] The first flange 2 and the second flange 3 are welded to both ends of the tooling pipe 1, and the angle is precisely adjusted by using the annular scale lines. Eight U-shaped brackets are welded to the end face of the fixed flange at 45° intervals to form a 360° annular support structure.

[0026] Step 2: On-site positioning

[0027] The adjusting flange 3 is fully welded to the embedded iron plate, and the verticality of the main pipe is calibrated using a laser level.

[0028] Step 3: Pipe Fitting Assembly

[0029] Align the flange hole of the pipe to be assembled with the U-shaped bracket for suspension and positioning. Fine-tune the axial direction of the pipe fitting using the 360° rotation function of the second flange 3. The accompanying tool ring can suspend three welding torches and a 2kg welding wire spool.

[0030] Step 4: Welding Operation

[0031] During welding, the tooling bracket can hold welding guns, welding wires and other tools. The bracket in tooling pipe 1 can hold simple and compact flanges for easy access during welding, avoiding repetitive work and rework, reducing the need for personnel to perform tedious and repetitive welding actions, and enabling long-term, uninterrupted operation, thereby increasing on-site welding efficiency.

[0032] The use of this tooling successfully solved the problem of inconvenient welding operations for on-site employees. It is simple and easy to operate, avoiding the quality problems and safety hazards caused by welding on the ground, and ensuring the accuracy of pipe system manufacturing. At the same time, it significantly reduces the time spent on post-weld correction of pipe fittings, saving labor intensity for on-site employees.

[0033] The above embodiments are not intended to limit the scope of this utility model. The scope of protection claimed by this utility model is not limited to the above embodiments, but should also include other obvious variations and alternatives to this utility model. All equivalent changes and modifications made based on the content of this utility model shall fall within the scope of this utility model.

Claims

1. An auxiliary tooling for welding splicing pipes of large diesel engines, characterized in that, include: The tooling tubing is made of high-strength seamless steel pipe; The first flange (2) is welded and fixed to one end of the tooling pipe, and the flange end face is machined with an annular positioning groove; The second flange (3) is welded and fixed to the other end of the tooling pipe; The adjusting bracket group (4) consists of multiple U-shaped brackets evenly distributed along the circumference of the first flange to form a ring support structure.

2. The auxiliary tooling for welding large diesel engine splice pipes according to claim 1, characterized in that, The adjustment bracket group (4) consists of 8 U-shaped brackets welded at 45° intervals to the end face of the first flange (2), forming a 360° annular support structure.

3. The auxiliary tooling for welding large diesel engine splice pipes according to claim 1, characterized in that, The cross-section of the annular positioning groove is trapezoidal, with a bottom width of 12mm, an opening width of 15mm, and a depth of 3mm, forming an interference fit with the flange of the splicing pipe flange.

4. The auxiliary tooling for welding large diesel engine splice pipes according to claim 1, characterized in that, The second flange (3) has a 360° rotation function, which is used to achieve axial fine adjustment of the pipe fitting.

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