CN218761936U - Structure for enhancing argon arc welding strength of thin-wall double-layer corrugated pipe - Google Patents
Structure for enhancing argon arc welding strength of thin-wall double-layer corrugated pipe Download PDFInfo
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- CN218761936U CN218761936U CN202223350350.XU CN202223350350U CN218761936U CN 218761936 U CN218761936 U CN 218761936U CN 202223350350 U CN202223350350 U CN 202223350350U CN 218761936 U CN218761936 U CN 218761936U
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Abstract
A structure for enhancing the argon arc welding strength of a thin-wall double-layer corrugated pipe is provided with a corrugated pipe body, a first outer ridge ring, a second outer ridge ring, a first flange part and a second flange part; one end of the corrugated pipe body is provided with a first outer ridge ring, and the first outer ridge ring is in interference fit with the corrugated pipe body; a second outer ridge ring is arranged at the other end of the corrugated pipe body, and the second outer ridge ring is in interference fit with the corrugated pipe body; the corrugated pipe body, the first outer ridge ring and the first flange piece which are in interference fit are welded with each other; the corrugated pipe body, the second outer ridge ring and the second flange piece which are in interference fit are welded with each other; the first outer ridge ring and the second outer ridge ring are provided with a melting area and an unmelted area after welding. The utility model is easy to realize, simple in structure and low in realization cost; the argon arc welding strength is obviously improved, the qualification rate of the air tightness inspection is greatly improved, and the labor productivity is improved; the wall thickness of the thin-wall pipe at the welding seam is increased, the bearing capacity at the welding seam of the thin-wall pipe is enhanced, and the service life is prolonged.
Description
Technical Field
The utility model relates to a reinforcing thin wall double-deck bellows argon arc welds welding strength's structure belongs to bellows technical field.
Background
At present, the welding of the thin-wall double-layer corrugated pipe and the special-shaped flange is carried out by adopting brazing, laser welding and argon arc welding; when brazing is adopted, on one hand, the brazing welding surface has good quality, the product uniformity is good, and the efficiency is high; on the other hand, the high temperature in the brazing furnace eliminates stress, causing the elasticity of the corrugated part to be reduced; resulting in cold welding adhesion between two layers of corrugated pipes and increased rigidity of the corrugated pipes. When laser welding is adopted, on one hand, the laser welding has high welding speed, small heat affected zone and small welding stress and deformation; on the other hand, the laser welding has high requirements on the thin-wall double-layer corrugated pipe and the thick-wall pipe, and generally requires that the thickness is controlled within 0.1mm and not more than 0.2mm, and the gap is required to be uniform.
However, when the thin-wall double-layer corrugated pipe is welded by argon arc welding, the thin-wall double-layer corrugated pipe and the thick-wall cast special-shaped flange are required to be welded together by argon arc welding to form a high-temperature engine gas channel, and the welding seam is required to have excellent sealing performance. The thin-wall corrugated pipe plays a role in pipeline heating compensation in the pipeline, and when the thin-wall double-layer corrugated pipe is welded with the special-shaped flange, the problems of thin-wall welding penetration, leakage and the like are easy to occur; after the machine is installed, the welding seam between the thin-wall double-layer corrugated pipe and the flange bears the pressure action of high-temperature and high-pressure gas, so that leakage failure is easy to occur; the finished product rate is low, and the technical requirements on constructors are high.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a reinforcing thin wall double-layer corrugated pipe argon arc welds welding strength's structure, when solving thin wall double-layer corrugated pipe and special-shaped flange welding, takes place the thin wall easily and welds the installation inefficacy problem that wears, reveals etc. and lead to.
In order to achieve the above object, the present invention provides the following technical solutions: a structure for enhancing argon arc welding strength of a thin-wall double-layer corrugated pipe comprises a corrugated pipe body, a first outer ridge ring, a second outer ridge ring, a first flange part and a second flange part;
the first outer ridge ring is arranged at one end of the corrugated pipe body, and the first outer ridge ring and the corrugated pipe body are in interference fit; the other end of the corrugated pipe body is provided with the second outer ridge ring, and the second outer ridge ring is in interference fit with the corrugated pipe body;
the corrugated pipe body, the first outer ridge ring and the first flange piece which are in interference fit are welded with each other; the corrugated pipe body, the second outer ridge ring and the second flange piece are welded with each other after the corrugated pipe body, the second outer ridge ring and the second flange piece are in interference fit;
the first outer ridge ring and the second outer ridge ring are provided with a melting area and an unmelted area after welding.
As a structural optimization scheme for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe, a first flared part is formed at one end of the corrugated pipe body and is sleeved on the periphery of the interface of the first flange part; the first outer ridge ring is disposed about a periphery of the first flared portion.
As a structural preferred scheme for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe, a second flared part is formed at the other end of the corrugated pipe body, and the second flared part is sleeved on the periphery of the interface of the second flange part; the second outer ridge ring is disposed about a periphery of the second flared portion.
As a structural optimization scheme for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe, the width of the first outer ridge ring is smaller than that of the first flared part, and the width of the second outer ridge ring is smaller than that of the second flared part.
As a structural optimization scheme for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe, the thickness of the first flange piece is larger than that of the corrugated pipe body; the thickness of the second flange piece is greater than the thickness of the bellows body.
As the preferred scheme of structure that reinforcing thin wall double-deck bellows argon arc welded weld strength, the inside of bellows body is equipped with the honeycomb duct, honeycomb duct one end switches on first flange spare, the other one end of honeycomb duct switches on second flange spare.
As a structural optimization scheme for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe, the melting region makes up for a welding hole generated in the welding process of the corrugated pipe body.
As a structural optimization scheme for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe, the unmelted area reinforces the welding seam generated in the welding process of the corrugated pipe body.
The utility model has the advantages of as follows: the corrugated pipe is provided with a corrugated pipe body, a first outer ridge ring, a second outer ridge ring, a first flange piece and a second flange piece; one end of the corrugated pipe body is provided with a first outer ridge ring, and the first outer ridge ring and the corrugated pipe body are in interference fit; a second outer ridge ring is arranged at the other end of the corrugated pipe body, and the second outer ridge ring is in interference fit with the corrugated pipe body; the corrugated pipe body, the first outer ridge ring and the first flange piece which are in interference fit are welded with each other; the corrugated pipe body, the second outer ridge ring and the second flange piece which are in interference fit are welded with each other; the first outer ridge ring and the second outer ridge ring are provided with a melting area and an unmelted area after welding. The utility model is easy to realize, simple in structure and low in realization cost; the argon arc welding strength is obviously improved, the qualification rate of the air tightness inspection is greatly improved, and the labor productivity is improved; the wall thickness of the thin-walled tube at the welding seam is increased, so that the bearing pressure at the welding seam of the thin-walled tube is enhanced, and the service life of the EGR tube in application is prolonged; the thickness of the pipe wall at the lap joint is changed, and compared with the welding of thin-wall pipes, the change of the form reduces the technical requirements of welding personnel and reduces the production cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic structural view of the enhanced thin-wall double-layer corrugated pipe argon arc welding strength provided in the embodiment of the present invention;
fig. 2 is a schematic diagram of the outer ridge ring and the corrugated tube body overlapping provided in the embodiment of the present invention.
In the figure, 1, a bellows body; 2. a first outer spine ring; 3. a second outer ridge ring; 4. a first flange member; 5. a second flange member; 6. a first flared portion; 7. a second flared portion; 8. and a flow guide pipe.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides a structure for enhancing welding strength of argon arc welding of a thin-wall double-layer corrugated pipe, including a corrugated pipe body 1, a first outer ridge ring 2, a second outer ridge ring 3, a first flange 4 and a second flange 5;
wherein, one end of the corrugated pipe body 1 is provided with a first outer ridge ring 2, and the first outer ridge ring 2 is in interference fit with the corrugated pipe body 1; a second outer ridge ring 3 is arranged at the other end of the corrugated pipe body 1, and the second outer ridge ring 3 is in interference fit with the corrugated pipe body 1;
the corrugated pipe body 1, the first outer ridge ring 2 and the first flange piece 4 which are in interference fit are welded with each other; the corrugated pipe body 1, the second outer ridge ring 3 and the second flange piece 5 which are in interference fit are welded with each other;
wherein, the first outer ridge ring 2 and the second outer ridge ring 3 are provided with a melting area and an unmelted area after welding.
In the embodiment, the wall thickness of the corrugated pipe body 1 is different from the wall thicknesses of the first flange part 4 and the second flange part 5, and argon arc welding is adopted for welding; at 1 both ends of bellows body, increase the first outer spine of assembly ring 2 and the outer spine of second ring 3, first outer spine of ring 2, the outer spine of second ring 3 all adopts interference fit with bellows body 1, can prevent the play of first outer spine of ring 2, the outer spine of second ring 3.
The corrugated pipe body 1 with the first outer ridge ring 2 and the second outer ridge ring 3 is in clearance fit with the first flange part 4 and the second flange part 5, and the axial positioning is determined by the flaring depth of the corrugated pipe body 1.
In this embodiment, a first flared portion 6 is formed at one end of the bellows body 1, and the first flared portion 6 is sleeved on the periphery of the interface of the first flange 4; the first outer ridge ring 2 is disposed at the periphery of the first flared portion 6. A second flared part 7 is formed at the other end of the corrugated pipe body 1, and the second flared part 7 is sleeved on the periphery of the interface of the second flange part 5; the second outer ridge ring 3 is arranged at the periphery of the second flared portion 7. The width of the first outer ridge ring 2 is smaller than the width of the first flared portion 6 and the width of the second outer ridge ring 3 is smaller than the width of the second flared portion 7. The thickness of the first flange part 4 is larger than that of the corrugated pipe body 1; the thickness of the second flange part 5 is greater than the thickness of the bellows body 1. The melting area compensates for the weld penetration holes produced during the welding of the bellows body 1. The unmelted areas reinforce the weld seam created by the welding process of the bellows body 1.
Specifically, a first flared part 6, a first flange part 4 and a first outer ridge ring 2 of the corrugated pipe body 1 are welded together through argon arc welding, a second flared part 7, a second flange part 5 and a second outer ridge ring 3 of the corrugated pipe body 1 are welded together through argon arc welding, and the three parts are used as base materials and are welded together through welding wires. A part of the first outer ridge ring 2 and a part of the second outer ridge ring 3 are used as base materials to be melted, so that the defect that the corrugated pipe body 1 is easy to weld through as a thin-wall part is overcome; the rest unmelted areas are reserved on the outer side of the corrugated pipe body 1, the function of a reinforcing ring is achieved, and the sealing performance and the pressure bearing capacity of the welding seam of the corrugated pipe body 1 are improved.
Specifically, argon arc welding prevents the corrugated pipe body 1 from entering a brazing furnace and being heated at high temperature, the elasticity of the corrugated part of the corrugated pipe body 1 is kept, two layers of the corrugated pipe body 1 are not adhered, and the increase of the rigidity of the corrugated pipe body 1 and the reduction of the elastic compensation capacity caused by the welding problem are prevented; laser welding with strict dimensional tolerance requirements is not adopted, the requirements on the precision grade of the part are reduced, and the production and manufacturing cost of the part is saved.
Specifically, the first outer ridge ring 2 and the second outer ridge ring 3 mainly compensate the problem of insufficient molten material during welding of the corrugated pipe body 1, so that high precision grade is not needed, and the width can be adjusted according to the welding lap joint width or the width of a thin pipe needing to be strengthened; the form of the first outer ridge ring 2 and the second outer ridge ring 3 can be determined according to the actual situation of the corrugated pipe body 1, the first flange part 4 and the second flange part 5, and can adopt the forms of chamfer or reducing step and the like, and is not limited to the form of an equal-diameter circular ring.
The first flared part 6 and the second flared part 7 can be adjusted in matching mode according to actual design; the width and thickness of the first outer ridge ring 2 and the second outer ridge ring 3 can be adjusted according to the actual design to adapt to the actual welding scheme.
In this embodiment, the bellows body 1 is provided inside with the flow guide tube 8, one end of the flow guide tube 8 is connected to the first flange 4, and the other end of the flow guide tube 8 is connected to the second flange 5. The honeycomb duct 8 reduces the impact force of the fluid on the corrugated pipe body 1, and plays a role in guiding the flow.
By adopting the technical scheme of the embodiment, in the production process of parts, the pipe diameter of the corrugated pipe body 1 in a thin-wall form needs to ensure the size and the wall thickness precision, and the tolerance requirement is met; when the corrugated pipe body 1 is flared, the flaring rate of the pipe orifice is required to be within the material expansion rate of the thin-wall pipe, and the design standard is met; the size tolerance of the flaring needs to meet the matching requirement of the port diameters of the first flange part 4 and the second flange part 5, and the diameter of the flaring needs to ensure certain roundness. The port sizes and the tolerances of the first flange part 4 and the second flange part 5 need to be matched with the inner diameter size of the flaring of the corrugated pipe body 1 in a thin-wall form, so that the precision requirement is met. The inner diameters of the first outer ridge ring 2 and the second outer ridge ring 3 are matched with the outer diameter of the flaring of the thin-wall corrugated pipe body 1, and the size and roundness tolerance are processed according to the precision requirement.
The first outer ridge ring 2, the second outer ridge ring 3 and the thin-wall corrugated pipe body 1 are in interference fit, and the first outer ridge ring 2, the second outer ridge ring 3 and the corrugated pipe body 1 are assembled together to form an assembly through a press-fitting tool; before the integral welding, the parts of the assembly can not generate relative displacement, and two points can be firstly welded by argon arc welding on the outer side to prevent the outer ridge ring from falling off and displacing.
The corrugated pipe comprises a corrugated pipe body 1, a first flared part 6, a second flared part 7, a first flange part 4, a second flange part 5 and a second flange part 5, wherein the first flared part and the second flared part are assembled together with the first flange part 4 and the second flange part 5 respectively; before welding, parts can not generate relative displacement, and two points can be welded by argon arc welding at the welding seam, so that the special-shaped flange and the component can be prevented from falling off and displacing.
In the welding process, the lap joint part at the welding seam is welded with the welding wire together to form the welding seam through the arc action of argon arc welding; through the experiment of limited times, set up suitable first outer spine ring 2 and the 3 width of second outer spine ring, the first outer spine ring 2 of welding back and the 3 retaining parts of second outer spine ring will form the beaded finish to bellows body 1 of welding seam department, have compensatied weak link. After welding, it is usually necessary to perform a gas-tight inspection and a cleanliness inspection; the welding seam is required to meet the standard sealing requirement; and impurities such as welding slag, welding skin and the like are not left in the pipeline. By adopting the technical scheme of the embodiment, the first air tightness inspection qualified rate of the EGR pipe is greatly improved through stress calculation and actual inspection, and the labor productivity is improved; the pressure bearing capacity of the welding seam of the thin pipe is enhanced, and the service life of the EGR pipe in application is prolonged; the pipe wall thickness of the lap joint is changed, the skill requirement of welding personnel is reduced, and the production cost is saved.
To sum up, the utility model is provided with a corrugated pipe body 1, a first outer ridge ring 2, a second outer ridge ring 3, a first flange piece 4 and a second flange piece 5; one end of the corrugated pipe body 1 is provided with a first outer ridge ring 2, and the first outer ridge ring 2 is in interference fit with the corrugated pipe body 1; a second outer ridge ring 3 is arranged at the other end of the corrugated pipe body 1, and the second outer ridge ring 3 is in interference fit with the corrugated pipe body 1; the corrugated pipe body 1, the first outer ridge ring 2 and the first flange part 4 which are in interference fit are welded with each other; the corrugated pipe body 1, the second outer ridge ring 3 and the second flange piece 5 which are in interference fit are welded with each other; the first outer ridge ring 2 and the second outer ridge ring 3 are provided with a melting area and an unmelted area after welding. The first flared part 6, the first flange part 4 and the first outer ridge ring 2 of the corrugated pipe body 1 are welded together through argon arc welding, the second flared part 7, the second flange part 5 and the second outer ridge ring 3 of the corrugated pipe body 1 are welded together through argon arc welding, and the three parts are welded together through welding wires as base materials. A part of the first outer ridge ring 2 and a part of the second outer ridge ring 3 are used as base materials to be melted, so that the defect that the corrugated pipe body 1 is easy to weld through as a thin-wall part is overcome; the rest unmelted areas are reserved on the outer side of the corrugated pipe body 1, play a role of a reinforcing ring, and improve the sealing performance and the pressure-bearing capacity of the welding seam of the corrugated pipe body 1. The argon arc welding avoids the corrugated pipe body 1 from entering a brazing furnace and being heated at high temperature, the elasticity of the corrugated part of the corrugated pipe body 1 is kept, and the two layers of the corrugated pipe body 1 are not adhered to each other, so that the increase of the rigidity and the reduction of the elasticity compensation capability of the corrugated pipe body 1 caused by the welding problem are prevented; laser welding with strict dimensional tolerance requirements is not adopted, the requirements on the precision grade of the part are reduced, and the production and manufacturing cost of the part is saved. The utility model is easy to realize, simple in structure and low in realization cost; the argon arc welding strength is obviously improved, the qualification rate of the air tightness inspection is greatly improved, and the labor productivity is improved; the wall thickness of the thin-walled tube at the welding seam is increased, so that the bearing pressure at the welding seam of the thin-walled tube is enhanced, and the service life of the EGR tube in application is prolonged; the thickness of the pipe wall at the lap joint is changed, and compared with the welding of thin-wall pipes, the change of the form reduces the technical requirements of welding personnel and reduces the production cost.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (6)
1. A structure for enhancing the argon arc welding strength of a thin-wall double-layer corrugated pipe is characterized by comprising a corrugated pipe body (1), a first outer ridge ring (2), a second outer ridge ring (3), a first flange piece (4) and a second flange piece (5);
one end of the corrugated pipe body (1) is provided with the first outer ridge ring (2), and the first outer ridge ring (2) is in interference fit with the corrugated pipe body (1); the other end of the corrugated pipe body (1) is provided with the second outer ridge ring (3), and the second outer ridge ring (3) is in interference fit with the corrugated pipe body (1);
the corrugated pipe body (1), the first outer ridge ring (2) and the first flange piece (4) which are in interference fit are welded with each other; the corrugated pipe body (1), the second outer ridge ring (3) and the second flange piece (5) which are in interference fit are welded with each other;
the first outer ridge ring (2) and the second outer ridge ring (3) are provided with a melting region and an unmelted region after being welded;
a first flared part (6) is formed at one end of the corrugated pipe body (1), and the first flared part (6) is sleeved on the periphery of the interface of the first flange part (4); the first outer ridge ring (2) is arranged at the periphery of the first flaring portion (6);
a second flared part (7) is formed at the other end of the corrugated pipe body (1), and the second flared part (7) is sleeved on the periphery of the interface of the second flange part (5); the second outer ridge ring (3) is arranged at the periphery of the second flared part (7).
2. The structure for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe as claimed in claim 1, wherein the width of the first outer ridge ring (2) is smaller than the width of the first flared part (6), and the width of the second outer ridge ring (3) is smaller than the width of the second flared part (7).
3. The structure for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe as claimed in claim 1, wherein the thickness of the first flange part (4) is greater than that of the corrugated pipe body (1); the thickness of the second flange piece (5) is larger than that of the corrugated pipe body (1).
4. The structure for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe as claimed in claim 1, wherein a flow guide pipe (8) is arranged inside the corrugated pipe body (1), one end of the flow guide pipe (8) is communicated with the first flange (4), and the other end of the flow guide pipe (8) is communicated with the second flange (5).
5. The structure for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe as claimed in claim 1, wherein the melting region is used for compensating a welding perforation hole generated in the welding process of the corrugated pipe body (1).
6. The structure for enhancing the argon arc welding strength of the thin-wall double-layer corrugated pipe as claimed in claim 1, wherein the unmelted region reinforces the welding seam generated in the welding process of the corrugated pipe body (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223350350.XU CN218761936U (en) | 2022-12-14 | 2022-12-14 | Structure for enhancing argon arc welding strength of thin-wall double-layer corrugated pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223350350.XU CN218761936U (en) | 2022-12-14 | 2022-12-14 | Structure for enhancing argon arc welding strength of thin-wall double-layer corrugated pipe |
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| Publication Number | Publication Date |
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| CN218761936U true CN218761936U (en) | 2023-03-28 |
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| CN202223350350.XU Active CN218761936U (en) | 2022-12-14 | 2022-12-14 | Structure for enhancing argon arc welding strength of thin-wall double-layer corrugated pipe |
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| CN (1) | CN218761936U (en) |
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