阅读说明：本技术 一种汽车进气端锥及其加工工艺 (automobile air inlet end cone and machining process thereof ) 是由 周彬彬 于 2019-08-08 设计创作，主要内容包括：本发明公开了一种汽车进气端锥及其加工工艺,涉及汽车排气系统领域,其中结构包括锥管,锥管呈肘关节弯曲状,锥管的两端分别形成大端口和小端口,锥管位于小端口的一端插接连接有法兰盘,锥管内于大端口和小端口之间形成气流通道；锥管沿气流通道的方向分为第一半壳和第二半壳,第一半壳和第二半壳的两侧边缘均设置有搭边,第一半壳和第二半壳通过搭边相互搭接拼合形成锥管。针对现有技术存在结构紧凑度不高、稳固性能不足的问题,本发明通过设置搭边,便于第一半壳和第二半壳相互拼接,防止两者相对错位,再利用法兰盘插接在锥管的一端,放置第一半壳和第二半壳分离,提高端锥结构的紧凑度和稳定性。(The invention discloses an automobile air inlet end cone and a processing technology thereof, relating to the field of automobile exhaust systems, wherein the structure comprises a conical pipe, the conical pipe is in an elbow joint bending shape, a large port and a small port are respectively formed at two ends of the conical pipe, one end of the conical pipe, which is positioned at the small port, is connected with a flange plate in an inserting way, and an airflow channel is formed between the large port and the small port in the conical pipe; the taper pipe is divided into a first half shell and a second half shell along the direction of the air flow channel, the edges of two sides of the first half shell and the second half shell are provided with overlap edges, and the first half shell and the second half shell are spliced to form the taper pipe through the mutual overlap of the overlap edges. Aiming at the problems of low structural compactness and insufficient stability in the prior art, the end cone structure is provided with the lap edges, so that the first half shell and the second half shell can be conveniently spliced with each other, the first half shell and the second half shell are prevented from being relatively dislocated, the flange plate is inserted at one end of the cone pipe, the first half shell and the second half shell are placed to be separated, and the compactness and the stability of the end cone structure are improved.)

1. the automobile air inlet end cone is characterized by comprising a cone pipe (1), wherein the cone pipe (1) is in an elbow joint bending shape, a large port (2) and a small port (3) are respectively formed at two ends of the cone pipe (1), one end, located at the small port (3), of the cone pipe (1) is connected with a flange plate (4) in an inserting mode, and an air flow channel (5) is formed between the large port (2) and the small port (3) in the cone pipe (1);

taper pipe (1) is followed the direction of airflow channel (5) is divided into first half shell (6) and second half shell (7), first half shell (6) with the both sides edge of second half shell (7) all is provided with scrap (8), first half shell (6) with second half shell (7) pass through scrap (8) overlap joint amalgamation each other forms taper pipe (1).

2. The automobile air inlet end cone as claimed in claim 1, wherein a through pipe (9) is integrally arranged on the side wall of the cone pipe (1), a connecting ring (10) for connecting an oxygen sensor is fixed in the through pipe (9), and a threaded hole (11) is formed in the inner wall of the connecting ring (10).

3. The vehicle intake end cone according to claim 2, wherein the large port (2) and the small port (3) are both in a complete circular shape, the large end and the small end of the first half-shell (6)/the second half-shell (7) are both in a semicircular structure, the first half-shell (6) and the second half-shell (7) are integrally provided with a half ring (12) at the overlap edge (8), and the two half rings (12) are spliced to form the through pipe (9).

4. The vehicle air inlet end cone according to claim 2 or 3, characterized in that the end surface of the connecting ring (10) at the inner end of the air flow channel (5) is provided with a concave curved surface (13) which is matched with the inner wall of the air flow channel (5).

5. The automobile air inlet end cone is characterized in that one end, close to the large port (2), of the cone pipe (1) is in a flaring shape, and a sealing groove (14) for placing a sealing ring is coaxially formed in the side face, far away from the large port (2), of the flange plate (4).

6. The vehicle air inlet end cone as claimed in claim 1, characterized in that the end of the cone tube (1) close to the small port (3) is inserted into the inner diameter of the flange (4), and the end of the cone tube (1) far from the large port (2) extends out of the flange (4).

7. The vehicle intake end cone according to claim 1, wherein the thickness of the lap (8) is the same as the wall thickness of the cone (1), and the lap (8) is disposed to protrude outward.

8. A processing technology of an automobile air inlet end cone is characterized by comprising the following processing steps:

s1: blanking, namely continuously processing the first half shell (6) and the second half shell (7), and carrying out forming processing by using the same blanking piece together, wherein the layout mode is a centrosymmetric layout mode;

S2: forming, namely stretching the blanking sheet through a stamping die to form an integral molded surface, a semi-ring (12), a large port (2) and a small port (3) of the first half shell (6) and the second half shell (7);

S3: shaping, positioning by using the molded surface of the workpiece, and shaping the formed stretching piece by using a shaping die;

S4: cutting edges, namely positioning by using the molded surface of the workpiece, and cutting off the excess materials at the port of the shaping piece and the semi-ring (12) in the step to obtain the complete molded surface profiles of the large port (2) and the small port (3);

S5: the first side cutting is positioned by the profile of the workpiece, and the edge contour line of the middle inner side area of the connecting piece of the first half shell (6) and the second half shell (7) is cut out on the side;

s6: a second side cut is positioned by the profile of the workpiece, and the outer edge contour line of the connecting piece of the first half shell (6) and the second half shell (7) is cut out on the side;

S7: separating, positioning by the profile of the workpiece, and cutting the connecting piece of the first half shell (6) and the second half shell (7) along the middle area;

s8: thirdly, performing side cutting, namely positioning the molded surface of the workpiece, performing side cutting on the edges of two sides of the small end of the first half shell (6), and performing side cutting to form outline edges to obtain a completely formed first half shell (6);

s9: fourth side cutting: positioning by using the profile of the workpiece, performing side cutting on the edges of two sides of the small end of the second half shell (7), and performing side cutting to obtain a profile edge to obtain a completely formed second half shell (7);

s10: welding, namely splicing the first half shell (6) and the second half shell through the laps (8) at the edges of the two sides of the first half shell, welding the laps (8), and then welding the flange plate (4) and the connecting ring (10);

s11: and (3) shaping, positioning by using the profile of the workpiece, and correcting the complete profile of the large port (2) at the position by using a shaping die.

9. The process for manufacturing an automobile air inlet end cone according to claim 8, wherein in the step S10, a sizing die is inserted into the air flow passage (5), and the sizing die is cooled while welding the side wall of the cone (1).

10. the process for manufacturing an automobile air inlet end cone according to claim 9, wherein in step S10, the first half shell (6) and the second half shell (7) are magnetically fixed on the side wall of the sizing die when the cone pipe (1) is welded.

Technical Field

The invention relates to the field of automobile exhaust systems, in particular to an automobile air inlet end cone and a processing technology thereof.

background

The automobile exhaust system is an important system component of an automobile engine in the working process, an air inlet end cone shell in the exhaust system is connected and communicated with the top end of a cylinder body of a catalytic converter, and the catalytic converter is directly connected to the back of an exhaust manifold through the air inlet end cone shell; the joint surface of the connecting parts of the large port and the small port is more complex, and the precision requirement on the parts is high.

For the existing end cone structure, for example, chinese patent with patent publication No. CN204113405U discloses an air inlet end cone of a three-way catalyst, which includes an air inlet end cone body, kidney-shaped holes distributed on the left and right sides of the air inlet end cone body and connected with an exhaust manifold, an oxygen sensor mounting hole distributed on the middle upper portion of the air inlet end cone body, and a plurality of guide pieces distributed on the front and rear portions of the inner surface of the air inlet end cone body.

in the above-mentioned patent, the inlet end awl body is made by the integrative type shaping of punching of sheet metal spare, and stress including the sheet metal spare memory after the punching press easily causes the sheet metal spare after the shaping to warp to lead to the size of inlet end awl body to be difficult to reach required precision, the inlet end awl body is unstable with being connected between other parts.

Disclosure of Invention

Aiming at the problems of low structural compactness and insufficient stability in the prior art, the invention aims to provide an automobile air inlet end cone and a processing technology thereof, and the automobile air inlet end cone has the advantages of compact structure and good stability.

In order to achieve the purpose, the invention provides the following technical scheme:

an automobile air inlet end cone comprises a cone pipe, wherein the cone pipe is in an elbow joint bending shape, a large port and a small port are formed at two ends of the cone pipe respectively, one end, located at the small port, of the cone pipe is connected with a flange plate in an inserting mode, and an air flow channel is formed between the large port and the small port in the cone pipe;

the taper pipe is followed airflow channel's direction is divided into first half shell and second half shell, first half shell with the both sides edge of second half shell all is provided with the overlap, first half shell with the second half shell passes through the mutual overlap joint amalgamation of overlap forms the taper pipe.

Through the technical scheme, the first half shell and the second half shell are conveniently spliced by arranging the scrap, the first half shell and the second half shell are prevented from being staggered relatively, the flange plate is inserted into one end of the taper pipe, the first half shell and the second half shell are placed to be separated, and the compactness and the stability of the end taper structure are improved.

Furthermore, a through pipe is integrally arranged on the side wall of the taper pipe, a connecting ring used for connecting the oxygen sensor is fixed in the through pipe, and a threaded hole is formed in the inner wall of the connecting ring.

Through the technical scheme, the connecting ring and the threaded hole are additionally arranged, so that the oxygen sensor can be detachably connected to the taper pipe.

furthermore, the large port and the small port are both in a complete circular shape, the large end and the small end of the first half shell/the second half shell are both in a semicircular structure, the first half shell and the second half shell are integrally provided with half rings at the joint edge, and the two half rings are spliced into the through pipe.

According to the technical scheme, the connecting ring is fixed in the through pipe, the contact area between the connecting ring and the inner wall of the through pipe is large, and the connection strength of the connecting ring is further enhanced; in addition, the through pipe is composed of two half rings, and the two half rings are respectively positioned on the first half shell and the second half shell, so that the connecting ring can be fixed in the through pipe, and the effect of enhancing the connecting strength of the first half shell and the second half shell can be achieved.

Furthermore, the end surface of the connecting ring at one end in the airflow channel is provided with a concave curved surface matched with the inner wall of the airflow channel.

Through above-mentioned technical scheme, set up the indent curved surface and avoid the one end of go-between to be located airflow channel, hinder the flow of air current, produce noise and vibration problem.

furthermore, one end of the taper pipe, which is close to the large port, is in a flaring shape, and a sealing groove for placing a sealing ring is coaxially formed in the side surface, which is far away from the large port, of the flange plate.

Through the technical scheme, the sealing groove is arranged, so that the sealing ring is arranged on the end face of the flange plate conveniently, and the connection tightness is improved.

furthermore, one end of the taper pipe close to the small port is inserted into the inner diameter of the flange plate, and one end of the taper pipe far away from the large port extends out of the flange plate.

through the technical scheme, the flange plate extends out of one end of the taper pipe, and the taper pipe is fixedly welded with the flange plate.

Furthermore, the thickness of the lap is the same as the wall thickness of the taper pipe, and the lap is arranged in a protruding mode.

Through above-mentioned technical scheme, the outside protrusion of scrap (bridge) forms, and the processing of being convenient for utilizes grafting between the scrap (bridge) to realize the concatenation of first half shell between the second half shell in addition, and the convex scrap (bridge) can also regard as the strengthening rib in addition, strengthens the structural strength that the end bores.

A processing technology of an automobile air inlet end cone comprises the following processing steps:

S1: blanking, namely continuously processing the first half shell and the second half shell, and jointly using the same blanking sheet for forming processing, wherein the layout mode is a centrosymmetric layout mode;

s2: forming, namely stretching the blanking sheet through a stamping die to form an integral molded surface, a semi-ring, a large port and a small port of the first half shell and the second half shell;

s3: shaping, positioning by using the molded surface of the workpiece, and shaping the formed stretching piece by using a shaping die;

s4: cutting edges, namely positioning by using the molded surface of the workpiece, and cutting the excess materials at the port of the shaping piece and the semi-ring in the step to obtain the complete large-port and small-port molded surface profiles;

s5: the first side cutting is carried out, the profile of the workpiece is used for positioning, and the edge contour line of the middle inner side area of the connecting piece of the first half shell and the second half shell is cut out in a side mode;

S6: the second side cut is positioned by the profile of the workpiece, and the outer edge contour line of the connecting piece of the first half shell and the second half shell is cut out on the side;

s7: separating, positioning by the profile of the workpiece, and cutting the connecting piece of the first half shell and the second half shell along the middle area;

S8: thirdly, performing side cutting, namely positioning the molded surface of the workpiece, performing side cutting on the edges of two sides of the small end of the first half shell, and performing side cutting to form a contour edge to obtain a completely formed first half shell;

s9: fourth side cutting: positioning by using the molded surface of the workpiece, performing side cutting on the edges of two sides of the small end of the second half shell, and performing side cutting to form outline edges to obtain a completely formed second half shell;

S10: welding, namely splicing the first half shell and the second half shell through the laps of the edges of the two sides of the first half shell and the second half shell, welding the laps, and then welding the flange plate and the connecting ring;

S11: and (4) shaping, namely positioning by using the profile of the workpiece, and correcting the complete profile of the large-port profile at the position by using a shaping die.

by the technical scheme, the first half shell and the second half shell are processed in pair, the processing precision is high, the first half shell and the second half shell are convenient to splice and match, and finally the taper pipe, the flange plate and the connecting ring are welded and fixed through welding; in the process, four times of side cutting and two times of shaping are adopted, so that the high forming size precision of the product is ensured.

further, in S10, a sizing die is inserted into the air flow passage, and the sizing die is cooled while welding the side wall of the conical tube.

According to the technical scheme, the shaping die is used for entering the airflow channel for welding, so that the situation that the size of the welded taper pipe is inaccurate due to the fact that the first half shell and the second half shell are shaken and the positions are changed in the welding process is avoided; through cooling stock mould, cooling taper pipe inner wall avoids welding treatment to reduce structural strength for the welding department solidifies.

further, in S10, when the taper pipe is welded, the first half shell and the second half shell are magnetically fixed on the sidewall of the sizing die.

Through above-mentioned technical scheme, adopt magnetism to inhale the structure and fix the taper pipe on the stock mould, convenient to use.

Compared with the prior art, the invention has the beneficial effects that:

(1) The first half shell and the second half shell are conveniently spliced with each other by arranging the overlap edge to prevent the first half shell and the second half shell from being relatively dislocated, and the flange plate is inserted at one end of the taper pipe to separate the first half shell and the second half shell, so that the compactness and the stability of the end taper structure are improved;

(2) Further, the half rings are integrally arranged, so that the connecting ring is fixed in the through pipe, and the first half shell and the second half shell are fixed together;

(3) Further, the first half shell and the second half shell are processed in pairs, the processing precision is high, the first half shell and the second half shell are convenient to splice and match, and finally the taper pipe, the flange plate and the connecting ring are welded and fixed through welding; in the process, four times of side cutting and two times of shaping are adopted, so that the high forming size precision of the product is ensured.

drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

fig. 2 is an exploded view of the embodiment.

Reference numerals: 1. a taper pipe; 2. a large port; 3. a small port; 4. a flange plate; 5. an air flow channel; 6. a first half shell; 7. a second half shell; 8. lapping; 9. pipe passing; 10. a connecting ring; 11. a threaded hole; 12. a half ring; 13. a concave curved surface; 14. sealing the groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following provides a detailed description of the present invention with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.

The utility model provides an automobile air inlet end awl, as shown in fig. 1 and 2, including taper pipe 1, taper pipe 1 is elbow joint bending form, the both ends of taper pipe 1 form big port 2 and port 3 respectively, big port 2 and port 3 are complete circular shape, the bore of big port 2 is greater than port 3's bore, form the airflow channel 5 that is used for giving vent to anger between big port 2 and port 3 in taper pipe 1, taper pipe 1 is located port 3's one end grafting connection has ring flange 4, taper pipe 1 is close to port 3's one end and pegs graft in ring flange 4 internal diameter, and taper pipe 1 keeps away from a tip of big port 2 and extends ring flange 4, be convenient for weld in ring flange 4 internal diameter week side, ensure the joint strength between taper pipe 1 and the ring flange 4.

Taper pipe 1 is half into first half shell 6 and second half shell 7 along airflow channel 5's direction, the main aspects and the tip of first half shell 6/second half shell 7 are semi-circular structure, and the both sides edge of first half shell 6 and second half shell 7 all is formed with scrap (bridge) 8 through the punching press, the thickness of scrap (bridge) 8 is the same with taper pipe 1's wall thickness, and scrap (bridge) 8 outwards protrusion sets up, first half shell 6 and second half shell 7 form taper pipe 1 through the mutual overlap joint amalgamation of scrap (bridge) 8, because taper pipe 1 adopts first half shell 6 and the concatenation of second half shell 7 to form, be convenient for release the internal stress of metal spare in the machine-shaping process, improve the manufacturing accuracy of product.

first half shell 6 and second half shell 7 are formed with semi-ring 12 at its scrap (bridge) 8 integrative punching press processing, and two semi-rings 12 splice into siphunculus 9, have go-between 10 through welded fastening in the siphunculus 9, and threaded hole 11 is seted up to go-between 10 inner wall, through at siphunculus 9 internal fixation go-between 10, not only be convenient for threaded connection oxygen sensor on siphunculus 9, can also play the effect of consolidating first half shell 6 and second half shell 7.

The end face of the connecting ring 10 at one end in the airflow channel 5 is provided with a concave curved surface 13 matched with the inner wall of the airflow channel 5, so that one end of the connecting ring 10 is prevented from being convexly arranged in the airflow channel 5, airflow is prevented from flowing, and noise is generated in the air outlet process. The one end that the taper pipe 1 is close to big port 2 is the flaring form, and the side that the big port 2 was kept away from to ring flange 4 is coaxial offers the seal groove 14 that is used for placing the sealing washer, avoids motor vehicle exhaust emission in-process to reveal.

A processing technology of an automobile air inlet end cone comprises the following processing steps:

s1: blanking, namely cutting off an integral metal plate by punching to obtain raw materials of the first half shell 6 and the second half shell 7, wherein the first half shell 6 and the second half shell 7 are positioned on the same blanking sheet, so that the first half shell 6 and the second half shell 7 are ensured to be produced in pairs, and the problem of part loss is reduced; the layout mode of the first half shell 6 and the second half shell 7 on the blanking sheet is centrosymmetric, and the taper pipe 1 is in an elbow joint bending shape, so that the metal plate can be fully utilized, the leftover materials generated by processing are reduced, and the resource utilization rate is improved;

s2: forming, namely stretching the blanking sheet through a stamping die to form the integral molded surfaces of the first half shell 6 and the second half shell 7, the large port 2, the small port 3 and the half ring 12;

s3: shaping, namely positioning the molded surface of a workpiece, shaping the molded tensile member through a shaping die, and circularly introducing cooling water into the shaping die for cooling, so that the problem that the shaping precision is low due to overheating of the shaping die in the batch production process is solved;

S4: cutting edges, namely positioning by using the molded surface of the workpiece, and cutting the excess materials at the port of the shaping piece and the position of the half ring 12 in the step to obtain the complete molded surface profiles of the large port 2 and the small port 3;

S5: the first side cutting is carried out, the profile of the workpiece is used for positioning, and the edge contour line of the middle inner side area of the connecting piece of the first half shell 6 and the second half shell 7 is cut out;

S6: second side cutting, which is positioned by the profile of the workpiece and is used for cutting the outline of the outer edge of the connecting piece of the first half shell 6 and the second half shell 7;

s7: separating, positioning by the profile of the workpiece, and cutting the connecting piece of the first half shell 6 and the second half shell 7 along the middle area;

s8: thirdly, performing side cutting, namely positioning by using the molded surface of the workpiece, performing side cutting on the edges of two sides of the small end of the first half shell 6, and performing side cutting to form a contour edge to obtain a completely formed first half shell 6;

s9: fourth side cutting: positioning by using the profile of the workpiece, performing side cutting on the edges of two sides of the small end of the second half shell 7, and performing side cutting to obtain a profile edge to obtain a completely formed second half shell 7;

S10: welding, wherein the first half shell 6 and the second half shell are spliced through the lapping edges 8 at the edges of the two sides of the first half shell to form a taper pipe 1, the flange plate 4 is inserted at one end of the taper pipe 1, then the taper pipe 1 is communicated with the flange plate 4 and is inserted on a shaping mold, the shaping mold is inserted into the airflow channel 5, and a magnet is embedded in the shaping mold, so that the first half shell 6 and the second half shell 7 are adsorbed on the shaping mold, and the shaking in the welding process is avoided; a circulating water channel is also formed in the shaping die, cooling water is introduced during welding, heat dissipation at the welding position is accelerated, the influence of thermal expansion and cold contraction on the half shell in the welding process is reduced, welding is finally carried out at the joint edge 8 of the outer side wall of the taper pipe 1, and the flange plate 4 and the connecting ring 10 are welded on the taper pipe 1;

S11: and (4) shaping, positioning by using the profile of the workpiece, and correcting the complete profile of the large port 2 at the position by using a shaping die.

In summary, the following steps:

when the invention is used, the first half shell 6 and the second half shell 7 are spliced with each other through the lapping edge 8, so that the relative dislocation of the first half shell 6 and the second half shell 7 is prevented, and the structural strength of the first half shell 6 and the second half shell 7 can be enhanced due to the raised lapping edge 8; the flange plate 4 is inserted at one end of the taper pipe 1, and the first half shell 6 and the second half shell 7 are placed to be separated, so that the compactness and the stability of the end taper structure are improved; by integrally arranging the half rings 12, the connecting ring 10 is fixed in the through pipe 9, and the first half shell 6 and the second half shell 7 are fixed together; the first half shell 6 and the second half shell 7 are processed in pairs, the processing precision is high, the first half shell 6 and the second half shell 7 are convenient to splice and match, and finally the taper pipe 1, the flange plate 4 and the connecting ring 10 are welded and fixed through welding; in the process, four times of side cutting and two times of shaping are adopted, so that the high forming size precision of the product is ensured.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.