Stainless steel liquid cooling pipeline joint welding method

Abstract

The invention discloses a welding method for a stainless steel liquid cooling pipeline joint. The welding method comprises the following steps that S1, a pipeline joint welding mode adopts an insertion type design; s2, the relation between the aperture d2 of the opening of the stainless steel pipe and the diameter d1 of the connector is d2 = d1 + 6mm; s3, centrally inserting the pipeline joint into the opening of the stainless steel pipeline by using a welding positioning tool, and keeping a single-side gap of 3mm; s4, the connector is fixed to the pipeline in a point mode through an opening reserved in the welding positioning tool; s5, the welding positioning tool is removed, the other openings of the pipeline are sealed through Boeing soft pieces, and a pipe opening in one end is reserved; a wooden plug is used for plugging the pipe opening in one end, and an inflation opening is drilled in the center of the wooden plug; argon is filled into the pipeline through the inflation inlet; and S6, the gap between the connector and the opening of the pipeline is filled with argon tungsten-arc welding. The single-side welding and double-side forming process of the stainless steel joint is realized.

Description

Technical Field

[0001] The invention relates to the technical field of metal welding, and in particular to a welding method for a stainless steel liquid cooling pipeline joint. Background Art

[0002] High-power radar generates a lot of heat, so it is cooled by liquid cooling, which uses a set of cold water supply pipes and a set of hot water return pipes. The cold and hot water pipes are connected by hoses, and the two ends of the hoses are screwed to the welding joints of the cold and hot water pipes. The joints are welded on the cold and hot water pipes in advance, and there are many of them.

[0003] The joints and pipes are made of stainless steel, which makes welding difficult. Liquid needs to circulate inside the pipes. To avoid blockage, the inside of the pipes must be kept clean to prevent welding slag from falling. Therefore, single-sided welding and double-sided forming are required during welding. Summary of the invention

[0004] The object of the present invention is to provide a stainless steel liquid cooling pipeline joint welding method to solve the stainless steel joint pipeline positioning and single-sided welding double-sided forming problems.

[0005] To this end, the present invention provides a welding method for a stainless steel liquid cooling pipe joint, comprising the following steps: S1, the pipe joint welding form adopts an insert design; S2, the relationship between the aperture d2 of the stainless steel pipe opening and the joint diameter d1 is: d2=d1+6mm; S3, using a welding positioning tool to insert the pipe joint centrally into the stainless steel pipe opening, maintaining a single-side gap of 3mm; S4, using the opening reserved on the welding positioning tool to fix the joint point on the pipe; S5, removing the welding positioning tool, using Boeing soft film to close the remaining openings of the pipe, leaving one end of the pipe opening; using a wooden plug to plug the one end of the pipe opening, and drilling an inflation port in the center of the wooden plug; filling argon gas into the inside of the pipe through the inflation port; S6, using tungsten inert gas arc welding to fill the gap between the joint and the pipe opening.

[0006] The present invention has the following technical effects: The present invention uses tooling to position the welding joints on the pipeline, thereby ensuring the relative size of each joint; through the plug-in joint design and enlarging the joint gap, the acid clamping problem caused by the root being unable to be welded is avoided; Boeing soft film, wooden plug, etc. are used to seal the pipeline opening, and argon gas is filled into the pipeline during welding, thereby achieving the effect of single-sided welding and double-sided forming.

[0007] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the use of tooling in the stainless steel liquid cooling pipe joint welding method of the present invention; Figure 2 yes Figure 1 Left view of Figure 3 It is a schematic diagram of the tooling used in the present invention; Figure 4 yes Figure 3 Left view of Figure 5 It is a schematic diagram of the tooling base used in the present invention; Figure 6 The present invention is a flow chart of a stainless steel liquid cooling pipe joint welding method. DETAILED DESCRIPTION

[0009] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0010] Combined with reference Figures 1 to 5 The welding positioning tool used in the stainless steel liquid cooling pipe joint welding method of the present invention includes a positioning tool 3 and a positioning shaft 4.

[0011] The positioning tool 3 comprises a base 31 , a bracket 32 ​​, and a tool joint 33 . The tool joint 33 is welded to the bracket 32 ​​, and the bracket 32 ​​is welded to the base 31 .

[0012] The base 31 is in the shape of a semicircular tube, and its inner arc is used to place the pipeline 1 (the pipeline 1 is positioned by the outer circle of the tube). In this embodiment, the welding joints 2 are symmetrically welded on both sides of the tube 1. The height of the base 31 reaches half of the tube diameter, and 120° V-shaped notches are opened on both sides. Holes are opened on the bracket 32 ​​to place the tooling joints 33. According to the number of joints on the pipeline, a corresponding number of positioning fixtures are made. After the pipeline 1, the pipeline joint 2, and the positioning fixture 3 are placed, the positioning shaft 4 is inserted to achieve coaxial positioning of the pipeline joint 2 and the welding joint 33, and then the positioning fixture 3 is rotated relative to the circumferential position of the tube 1 to achieve accurate positioning before welding.

[0013] The positioning welding process of the stainless steel liquid cooling pipeline joint of the present invention is as follows: first, the welding form of the joint 2 is designed to be an insertion type, the joint welding gap is designed, the joint 2 is positioned using a welding tool, the tool is removed, the pipeline opening is sealed using Boeing soft film and a wooden plug, argon gas is filled into the pipeline, and then welding is performed.

[0014] like Figure 6 As shown, the welding method specifically includes the following steps: S1. The pipe joint welding form adopts the plug-in design; S2, the relationship between the opening diameter d2 of the stainless steel pipe on the pipeline and the diameter d1 of the joint is: d2=d1+6; S3. Use the welding positioning tool to insert the pipe joint into the pipe opening in the center, keeping a single-side gap of 3mm; S4. Use the reserved opening on the welding positioning tool to spot weld the pipe joint to the pipeline; S5. Remove the welding positioning tooling, use Boeing soft film to seal the remaining openings of pipeline 1, leaving one end of the pipe opening; use a wooden plug to plug the port, and drill an air filling port in the center of the wooden plug. The relationship between the hole diameter d3 of the air filling port and the diameter d4 of the air filling pipe is: d3=d4+0.5; fill argon gas into the pipe through the air filling port; S6. Use tungsten inert gas welding to fill the gap between the joint and the pipe opening.

[0015] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for welding a stainless steel liquid cooling pipe joint, characterized in that: The following steps are involved: S1. The pipe joint welding form adopts the plug-in design; S2, the relationship between the stainless steel pipe opening diameter d2 and the joint diameter d1 is: d2=d1+6mm; S3. Use the welding positioning tool to insert the pipe joint into the stainless steel pipe opening in the center, keeping a single-side gap of 3mm; S4. Use the reserved opening on the welding positioning tool to fix the joint point on the pipeline; S5. Remove the welding positioning tooling, use Boeing soft film to seal the remaining openings of the pipeline, leaving one end of the pipe opening; use a wooden plug to plug the one end of the pipe opening, and drill an inflation port in the center of the wooden plug; fill argon gas into the interior of the pipeline through the inflation port; S6. Use tungsten inert gas welding to fill the gap between the joint and the pipe opening.

2. The stainless steel liquid cooling pipe joint welding method according to claim 1, characterized in that: The welding positioning tool comprises a positioning tool (3) and a positioning shaft (4); the positioning tool (3) comprises a base (31), a bracket (32) and a tool joint (33); the bracket (32) is welded to the base (31); the tool joint (33) is welded to the bracket (32); the positioning shaft (4) passes through the tool joint (33) and the pipe joint (2), thereby achieving positioning.

3. The stainless steel liquid cooling pipe joint welding method according to claim 2, characterized in that: The pipe joints (2) are symmetrically welded on both sides of the stainless steel pipe, and the height of the base (31) reaches half the pipe diameter.

4. The stainless steel liquid cooling pipe joint welding method according to claim 3, characterized in that: The base has an inner arc for placing a stainless steel pipe.

5. The stainless steel liquid cooling pipe joint welding method according to claim 3, characterized in that: The base (31) is designed with a V-shaped notch, and the bottom angle of the V-shaped notch is designed to be 120°.

6. The stainless steel liquid cooling pipe joint welding method according to claim 2, characterized in that: The bracket (32) has a hole, and the tooling joint (33) is inserted into the hole for welding.

7. The stainless steel liquid cooling pipe joint welding method according to claim 2, characterized in that: The tooling joint (33) and the pipeline joint (2) are the same type of joints.

8. The stainless steel liquid cooling pipe joint welding method according to claim 2, characterized in that: Use a wooden plug to plug the reserved port. An inflation hole is drilled in the center of the wooden plug. The relationship between the hole diameter d3 and the inflation tube diameter d4 is: d3=d4+0.5mm.

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