Variable-wall-thickness stainless steel automobile exhaust pipe

Abstract

The utility model discloses a variable wall thickness stainless steel automobile exhaust pipe, which comprises a pipe body, the pipe body is divided into a zone A, a zone D, a zone B, a zone E and a zone C. The zone D and the zone E are transition zones, the zone B is a middle zone with equal thickness, the zone A and the zone C are outer end zones with equal thickness, the zone A, the zone D, the zone E and the zone C are respectively provided with a gradual change type variable wall thickness structure, and the gradually change type variable wall thickness structures are arranged on the pipe body. The utility model relates to the technical field of exhaust pipes, adopts a variable-wall-thickness stainless steel exhaust pipe design to replace an equal-wall-thickness stainless steel exhaust pipe, achieves the effect of light weight of the automobile exhaust pipe through the variable-wall-thickness design, saves materials and reduces cost, simultaneously reduces the weight of the automobile exhaust pipe, guarantees the product performance, saves the materials, and simultaneously reduces the cost of the automobile exhaust pipe. The effect of reducing the cost is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust pipes, in particular to a variable-wall-thickness stainless steel automobile exhaust pipe. Background Art

[0002] Stainless steel pipes are used to make automobile exhaust manifolds, center pipes, mufflers, tail pipes, etc. The exhaust pipe mainly plays the role of reducing vibration and noise (silence) and reducing harmful gas pollution.

[0003] Lightweighting of automobiles is a trend in the development of existing automobile technology. It is of great significance to saving fuel, reducing emissions, improving performance and the healthy development of the automobile industry.

[0004] Existing automotive exhaust pipes are all made of stainless steel with uniform thickness, making it impossible to reduce weight by optimizing thickness. However, unequal wall thickness pipes allow for differentiated thickness designs at different locations, thereby reducing the overall weight of the part. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the utility model provides a variable wall thickness stainless steel automobile exhaust pipe, which solves the problem that automobile exhaust pipes are all stainless steel pipes of uniform thickness and weight reduction cannot be achieved by optimizing the thickness.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a variable wall thickness stainless steel automobile exhaust pipe, including a pipe body, the pipe body is divided into area A, area D, area B, area E and area C, the areas D and E are transition sections, the area B is an intermediate section of equal thickness, the areas A and C are outer end areas of equal thickness, and the areas A and D as well as areas E and C are all provided with a gradually changing wall thickness structure.

[0007] Preferably, the gradually changing wall thickness structure includes an inner diameter gradually changing wall thickness structure, and the inner diameter gradually changing wall thickness structure includes that the outer diameters of zone A and zone D and zone E and zone C are equal, the inner diameters of zone A and zone C are equal, the inner walls of zone E and zone C are conical structures, and the inner diameters of zone E and zone D gradually increase from zone A and zone C to zone B.

[0008] Preferably, the gradually changing wall thickness structure also includes an outer diameter gradually changing wall thickness structure, and the outer diameter gradually changing wall thickness structure includes that the inner diameters of zone A and zone D and zone E and zone C are equal, the outer diameters of zone A and zone C are equal, the outer walls of zone E and zone C are conical structures, and the outer diameters of zone E and zone D gradually decrease from zone A and zone C to zone B.

[0009] Preferably, the gradually changing wall thickness structure also includes an inner and outer diameter gradually changing wall thickness structure, wherein the inner and outer diameters of zone A and zone C are equal, the inner and outer walls of zone E and zone C are both conical structures, and the inner and outer diameters of zone E and zone D gradually decrease from zone A and zone C to zone B.

[0010] Beneficial effects

[0011] The utility model provides a variable wall thickness stainless steel automobile exhaust pipe, which has the following beneficial effects: the variable wall thickness stainless steel exhaust pipe design is adopted to replace the uniform wall thickness stainless steel exhaust pipe, and the variable wall thickness design saves materials and reduces costs, thereby achieving the effect of lightweighting the automobile exhaust pipe, while reducing the weight of the automobile exhaust pipe and ensuring the performance of the product, thereby saving material usage and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a top view of the utility model.

[0013] Figure 2 This is a schematic diagram of the inner diameter gradual change structure of the utility model.

[0014] Figure 3 This is a schematic diagram of the outer diameter gradual change structure of the utility model.

[0015] Figure 4 This is a schematic diagram of the utility model's internal and external diameter gradual change structure.

[0016] In the figure: 1. Tube body. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-4 The utility model provides a technical solution: a variable wall thickness stainless steel automobile exhaust pipe, comprising a pipe body 1, wherein the pipe body 1 is divided into an A zone, a D zone, a B zone, an E zone and a C zone, wherein the D zone and the E zone are transition sections, the B zone is an intermediate section of equal thickness, the A zone and the C zone are outer end sections of equal thickness, and the A zone, the D zone, the E zone and the C zone are all provided with a gradual variable wall thickness structure;

[0019] The pipe body 1 is made of stainless steel rolled differential thickness plate as a blank, which is rolled and welded along the width direction to obtain a variable wall thickness stainless steel exhaust pipe, wherein the exhaust pipe can be a stainless steel exhaust pipe with gradually changing inner diameter and wall thickness, a stainless steel exhaust pipe with gradually changing inner and outer diameters and wall thickness, or a stainless steel exhaust pipe with gradually changing outer diameter and wall thickness;

[0020] Several equal thickness areas and at least one transition area are designed along the length of the exhaust pipe. Each equal thickness area is connected by a transition area. The thickness of the equal thickness area ranges from 0.5 to 3.5 mm. The length of the transition area is 80 to 200 times the thickness difference between the two equal thickness areas it connects. The ratio of the thickest thickness to the thinnest thickness of the same variable wall thickness stainless steel straight pipe shall not exceed 2.1:1.

[0021] Usually, the pipe ends are involved in flaring, and the pipe body is involved in bending and bulging. Thicker pipe walls can be designed, while other locations use thinner pipe walls to achieve the greatest weight reduction effect.

[0022] Laser welding, argon arc welding or thermal resistance welding can be used at the weld to ensure good welding effect. The inner diameter design range of variable wall thickness stainless steel straight pipe is φ6~60mm, and the length design range is 100~3000mm.

[0023] Furthermore, the gradually changing wall thickness structure includes an inner diameter gradually changing wall thickness structure, and the inner diameter gradually changing wall thickness structure includes that the outer diameters of zone A and zone D and zone E and zone C are equal, the inner diameters of zone A and zone C are equal, the inner walls of zone E and zone C are conical structures, and the inner diameters of zone E and zone D gradually increase from zone A and zone C to zone B.

[0024] Furthermore, the gradually changing wall thickness structure also includes an outer diameter gradually changing wall thickness structure, wherein the outer diameter gradually changing wall thickness structure includes that the inner diameters of zone A and zone D and zone E and zone C are equal, the outer diameters of zone A and zone C are equal, the outer walls of zone E and zone C are conical structures, and the outer diameters of zone E and zone D gradually decrease from zone A and zone C to zone B.

[0025] Furthermore, the gradually changing wall thickness structure also includes an inner and outer diameter gradually changing wall thickness structure, wherein the inner and outer diameters of zone A and zone C are equal, the inner and outer walls of zone E and zone C are both conical structures, and the inner and outer diameters of zone E and zone D gradually decrease from zone A and zone C to zone B.

[0026] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process.

[0027] Embodiment: When in use, the tube body 1 usually needs to have corresponding mechanical connections or welding with the silencer bag, baffle, and fixed installation position. The installation method is the same as the existing exhaust pipe method, which belongs to the well-known technology. By using a variable wall thickness stainless steel exhaust pipe, the wall thickness of the tube at different positions can be flexibly designed according to needs, and the weight of the parts can be minimized while ensuring the performance of the parts.

[0028] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable wall thickness stainless steel automobile exhaust pipe, comprising a pipe body (1), characterized in that: The tube body (1) is divided into zone A, zone D, zone B, zone E and zone C, wherein the zones D and E are transition sections, the zone B is an intermediate section of equal thickness, the zones A and C are outer end sections of equal thickness, and the zones A and D as well as the zones E and C are all provided with a gradually changing wall thickness structure.

2. The variable wall thickness stainless steel automobile exhaust pipe according to claim 1, characterized in that: The gradually changing wall thickness structure includes an inner diameter gradually changing wall thickness structure, wherein the outer diameters of zones A and D and zones E and C are equal, the inner diameters of zones A and C are equal, the inner walls of zones E and C are conical structures, and the inner diameters of zones E and D gradually increase from zones A and C to zone B.

3. The variable wall thickness stainless steel automobile exhaust pipe according to claim 1, characterized in that: The gradually changing wall thickness structure also includes an outer diameter gradually changing wall thickness structure, wherein the outer diameter of the gradually changing wall thickness structure includes that the inner diameters of zones A and D and zones E and C are equal, the outer diameters of zones A and C are equal, the outer walls of zones E and C are conical structures, and the outer diameters of zones E and D gradually decrease from zones A and C to zone B.

4. The variable wall thickness stainless steel automobile exhaust pipe according to claim 3, characterized in that: The gradually changing wall thickness structure also includes an inner and outer diameter gradually changing wall thickness structure, wherein the inner and outer diameters of zone A and zone C are equal, the inner and outer walls of zone E and zone C are both conical structures, and the inner and outer diameters of zone E and zone D gradually decrease from zone A and zone C to zone B.

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