CN215860424U

CN215860424U - Automobile exhaust pipe reducing confluence part butt joint structure

Info

Publication number: CN215860424U
Application number: CN202122025064.5U
Authority: CN
Inventors: 卢山峰; 王卫平; 张术东; 陈敏
Original assignee: Guangzhou Sango Auto Parts Co ltd
Current assignee: Guangzhou Sango Auto Parts Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-02-18
Anticipated expiration: 2031-08-25

Abstract

The utility model relates to the technical field of automobile parts, in particular to a reducing confluence part butt joint structure of an automobile exhaust pipe. The structure comprises a first half pipe and a second half pipe, wherein both sides of the semicircle of the first half pipe are provided with first straight edges, both sides of the semicircle of the second half pipe are provided with second straight edges, and the first straight edges are correspondingly connected with the second straight edges; the end part of the first straight edge is provided with a gradual change part which is jointed with the second straight edge in a bearing way. In addition, the first half pipe and the second half pipe are welded to form a variable-diameter junction pipe, and the end part of the variable-diameter junction pipe is welded with the end part of the cylindrical pipe. Through setting up gradual change portion, when first half pipe, the half pipe welding of second, gradual change portion holds the tip of second straight flange and puts, and gradual change portion narrows first half pipe, the half pipe welding position's of second clearance moreover, and when reducing flow combining pipe and cylinder pipe assembly welding, the fit clearance of circumference position is more reasonable, produces the bad condition of welding when avoiding the welding wire welding.

Description

Automobile exhaust pipe reducing confluence part butt joint structure

Technical Field

The utility model relates to the technical field of automobile parts, in particular to a reducing confluence part butt joint structure of an automobile exhaust pipe.

Background

The reducing exhaust pipe is a commonly used part in the automobile industry at present, and the requirements on the production and manufacturing process of the reducing exhaust pipe are higher and higher. At present, all the pipe fittings of the reducing exhaust pipe are connected basically in a welding mode, so that the fit clearance among all the pipe fittings has great influence on the welding process. The gap between the prior reducing confluence pipe fitting and the circular pipe fitting after assembly is too large, and the diameter of a welding wire is smaller than the assembly gap, so that poor welding is caused.

Chinese patent publication No. CN104747259A discloses a reducing exhaust pipe in 2015, 07/01, which is formed by welding a reducing cylinder and a cylindrical cylinder, wherein an upper pipe body and a lower pipe body are welded into an integral structure, the diameters of connection ports of the upper pipe body and the lower pipe body are the same, the upper pipe body is the reducing cylinder, and the lower pipe body is the cylindrical cylinder. Although the structural form of the reducing exhaust pipe is disclosed, the specific form is not disclosed on the welding structure of the reducing cylinder and the cylindrical cylinder, and the problem of overlarge welding gap of the pipe fitting is not solved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a butt joint structure of a reducing and converging part of an automobile exhaust pipe, aiming at overcoming the defect of a welding gap of the reducing and converging part of the exhaust pipe, so that the fit gap of each part with the reducing diameter of the exhaust pipe is more reasonable, and the condition of poor welding during welding of a welding wire is avoided.

In order to solve the technical problems, the utility model adopts the technical scheme that:

a variable-diameter confluence part butt joint structure of an automobile exhaust pipe comprises a first half pipe and a second half pipe, wherein both sides of a semicircle of the first half pipe are provided with first straight edges, both sides of a semicircle of the second half pipe are provided with second straight edges, and the first straight edges are correspondingly connected with the second straight edges; the end part of the first straight edge is provided with a gradual change part which is jointed with the second straight edge in a bearing way. The first half pipe and the second half pipe are components of the reducing pipe, the first half pipe and the second half pipe are combined to form a complete pipe body, when the first half pipe is connected with the second half pipe, the first straight edge and the second straight edge of the connecting edge are overlapped and tightly attached, meanwhile, the gradual change portion bears and places the end portion of the second straight edge, and the fit clearance is narrowed.

As one preferable scheme, the first straight edge and the second straight edge are jointed and welded, and the first half pipe and the second half pipe are combined into a complete pipe body. Typically, the edges of the first and second half-pipes are formed integrally by welding.

Preferably, the inner diameter of the first half pipe at the first straight edge position is larger than the inner diameter of the second half pipe at the second straight edge position, and the outer side of the second straight edge is attached to the inner side of the first straight edge during welding. The inner diameter of the second straight edge of the second half pipe is smaller, the second straight edge is positioned on the inner side during welding, the inner diameter of the first straight edge of the first half pipe is larger, the first straight edge is positioned on the outer side during welding, the first straight edge and the second straight edge are attached and welded, and the gaps between the first straight edge and the second straight edge are further narrowed by the gradual change parts at the two ends.

Preferably, the inner diameter of the first half pipe at the gradual change part is equal to the inner diameter of the second half pipe at the second straight edge position. Because the inner diameters of the first straight edge and the second straight edge are different, the connecting position of the end part of the pipe body cannot be in smooth transition after welding, and a gradual change part is arranged to narrow a part of a gap between the first straight edge and the second straight edge after welding, wherein the part is usually 1-2mm in pipe wall size.

Preferably, the tapered portion is formed by stamping integrally with the first half pipe. And cutting a seam during punching of the first half pipe and processing the seam inwards to form a gradual change part, wherein the thickness of the gradual change part is equal to the thickness of the first half pipe.

As a preferable scheme, the first straight side and the second straight side are both rectangular sides. The first straight edge and the second straight edge are respectively arranged along the edges of the first half pipe and the second half pipe.

Preferably, the average wall thickness of the first half pipe and the second half pipe is equal.

The first half pipe and the second half pipe are welded to form a variable diameter flow tube, and the end part of the variable diameter flow tube is welded with the end part of the cylindrical pipe. The first half pipe and the second half pipe are welded to form a variable diameter junction pipe and then are welded and communicated with the cylindrical pipe, and welding is usually carried out around the circumference.

Preferably, the outer diameter of the cylindrical pipe is smaller than or equal to the inner diameter of the variable diameter flow combining pipe. The end part of the variable diameter converging tube is sleeved on the cylindrical tube, and then welding wires are adopted to weld around the overlapped circumferential parts of the variable diameter converging tube and the cylindrical tube.

In one preferable scheme, the gap between the first half pipe, the second half pipe and the cylindrical pipe is less than 1mm during welding. First half pipe, second half pipe are welded earlier, because the internal diameter of first straight flange, second straight flange is different, have great clearance at the coincidence position after the welding, and the gradual change portion through the tip effectively narrows down this welding position's clearance, and when reducing the coincidence flow pipe and cylinder assembly welding, the fit clearance of circumference position is more reasonable, produces the bad condition of welding when avoiding the welding wire welding.

Compared with the prior art, the utility model discloses a reducing confluence part butt joint structure of an automobile exhaust pipe, which has the following beneficial effects: this structure becomes the reducing flow-joining tube with first half pipe, half tub of welding of second constitution, again with reducing flow-joining tube and cylinder pipe welding, wherein through setting up gradual change portion, at first half pipe, half tub of welding of second, gradual change portion holds the tip of second straight flange and puts, and gradual change portion narrows first half pipe, half tub of welding position's of second clearance, when reducing flow-joining tube and cylinder pipe assembly welding, the fit clearance of circumference position is more reasonable, produce the bad condition of welding when avoiding the welding wire welding.

Drawings

FIG. 1 is a schematic view of an assembly structure of a first half pipe and a second half pipe of the embodiment.

Fig. 2 is an exploded view of the first half pipe and the second half pipe according to the embodiment.

Fig. 3 is a schematic view of the overall structure of the embodiment.

FIG. 4 is a cross-sectional view of the weld assembly of the embodiments.

Fig. 5 is a weld assembly without a transition.

Wherein, 1 first half pipe, 2 second half pipes, 3 first straight sides, 4 second straight sides, 5 gradual change portions, 6 cylindrical pipes, 7 reducing convergent flow pipes.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The technical scheme of the utility model is further described in detail by the following specific embodiments in combination with the attached drawings:

examples

As shown in fig. 1 to 3, the embodiment provides a variable-diameter confluence butt joint structure of an automobile exhaust pipe, which includes a first half pipe 1, a second half pipe 2 and a cylindrical pipe 6, wherein the average wall thickness of the first half pipe 1 and the second half pipe 2 is equal. The first half pipe 1 and the second half pipe 2 are welded to form the variable diameter flow combining pipe 7, and then the end part of the variable diameter flow combining pipe 7 is welded with the end part of the cylindrical pipe 6.

Specifically, the edges of two sides of the semicircle of the first half pipe 1 are both provided with a first straight edge 3, the edges of two sides of the semicircle of the second half pipe 2 are both provided with a second straight edge 4, and the first straight edge 3 and the second straight edge 4 are both rectangular edges.

The inner diameter of the first half pipe 1 at the position of the first straight edge 3 is larger than that of the second half pipe 2 at the position of the second straight edge 4, during welding, the outer side of the second straight edge 4 is attached to the inner side of the first straight edge 3, welding is carried out at the attaching position, and the edges of the first half pipe 1 and the second half pipe 2 are integrally formed through welding.

In this embodiment, the end of the first straight edge 3 is provided with a gradual change portion 5 for receiving the second straight edge 4, the gradual change portion 5 and the first half pipe 1 are integrally formed by press forming, and the gradual change portion 5 is formed by cutting a slit and processing inward when the first half pipe 1 is pressed. Meanwhile, the inner diameter of the first half pipe 1 at the gradual change part 5 is equal to the inner diameter of the second half pipe 2 at the second straight edge 4, the first straight edge 3 and the second straight edge 4 of the connecting edge are overlapped and tightly attached, and meanwhile, the gradual change part 5 bears and places the end part of the second straight edge 4 and narrows the fit clearance.

The first half pipe 1 and the second half pipe 2 are welded to form a variable diameter flow combining pipe 7 and then are welded and communicated with the cylindrical pipe 6, and welding is usually carried out around the circumference. The outer diameter of the cylindrical pipe 6 is smaller than or equal to the inner diameter of the variable diameter flow combining pipe 7, the end part of the variable diameter flow combining pipe 7 is sleeved on the cylindrical pipe 6, and then welding wires are adopted to weld around the overlapped circumferential parts of the variable diameter flow combining pipe and the cylindrical pipe.

Since the inner diameters of the first straight side 3 and the second straight side 4 are different, after the variable diameter flow tube 7 is welded, the connecting position of the end part of the variable diameter flow tube 7 cannot be smoothly transited, and if the variable diameter flow tube 7 is directly welded with the end part of the cylindrical tube 6, a large gap occurs, as shown in fig. 5, poor welding occurs during welding wire welding.

As shown in fig. 4, the gradual change portion 5 is provided to narrow the gap between the first straight edge 3 and the second straight edge 4 after welding, which is generally equal to the pipe wall size, and is preferably 1 mm. During welding, first half pipe 1, second half pipe 2, the mutual clearance of cylinder 6 is less than 1mm, first half pipe 1, second half pipe 2 welds at first, because the internal diameter of first straight flange 3, second straight flange 4 is different, there is great clearance at the coincidence position after the welding, the gradual change portion 5 through the tip effectively narrows down this welding position's clearance, when reducing coincidence pipe 7 and cylinder 6 assembly welding, the fit clearance of circumference position is more reasonable, produce the bad condition of welding during the welding of welding wire avoiding.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides an automobile exhaust pipe reducing confluence butt-joint structure which characterized in that: the pipe joint comprises a first half pipe (1) and a second half pipe (2), wherein a first straight edge (3) is arranged on each of two sides of a semicircle of the first half pipe (1), a second straight edge (4) is arranged on each of two sides of a semicircle of the second half pipe (2), and the first straight edge (3) is correspondingly connected with the second straight edge (4); the end part of the first straight edge (3) is provided with a gradual change part (5) which is jointed with the second straight edge (4) in a bearing way.

2. The automobile exhaust pipe reducing confluence part butt joint structure as claimed in claim 1, wherein: the first straight edge (3) and the second straight edge (4) are jointed and welded, and the first half pipe (1) and the second half pipe (2) are combined into a complete pipe body.

3. The automobile exhaust pipe reducing confluence part butt joint structure as claimed in claim 2, wherein: the inner diameter of the first half pipe (1) at the position of the first straight edge (3) is larger than that of the second half pipe (2) at the position of the second straight edge (4), and the outer side of the second straight edge (4) is attached to the inner side of the first straight edge (3) during welding.

4. The automobile exhaust pipe reducing confluence part butt joint structure as claimed in claim 3, wherein: the inner diameter of the first half pipe (1) at the gradual change part (5) is equal to the inner diameter of the second half pipe (2) at the position of the second straight edge (4).

5. The automobile exhaust pipe reducing confluence part butt joint structure as claimed in claim 4, wherein: the gradual change portion (5) and the first half pipe (1) are integrally formed in a punching mode.

6. The automobile exhaust pipe reducing confluence part butt joint structure as claimed in claim 5, wherein: the first straight edge (3) and the second straight edge (4) are both rectangular edges.

7. The automobile exhaust pipe reducing confluence part butt joint structure as claimed in claim 6, wherein: the average wall thickness of the first half pipe (1) and the second half pipe (2) is equal.

8. The automobile exhaust pipe reducing and converging portion butt joint structure according to any one of claims 1 to 7, characterized in that: the pipe joint comprises a cylindrical pipe (6), wherein a variable-diameter flow-combining pipe (7) is formed by welding a first half pipe (1) and a second half pipe (2), and the end part of the variable-diameter flow-combining pipe (7) is welded with the end part of the cylindrical pipe (6).

9. The automobile exhaust pipe reducing confluence part butt joint structure as claimed in claim 8, wherein: the outer diameter of the cylindrical pipe (6) is smaller than or equal to the inner diameter of the variable diameter flow combining pipe (7).

10. The automobile exhaust pipe reducing confluence part butt joint structure as claimed in claim 9, wherein: and during welding, the mutual clearance between the first half pipe (1), the second half pipe (2) and the cylindrical pipe (6) is less than 1 mm.