CN104165078A

CN104165078A - Exhaust pipe auxiliary silencer structure and manufacturing technology thereof

Info

Publication number: CN104165078A
Application number: CN201410378226.5A
Authority: CN
Inventors: 胡冬青
Original assignee: WUHAN SANHUI MINTH AUTOMOBILE PARTS Co Ltd
Current assignee: WUHAN SANHUI MINTH AUTOMOBILE PARTS Co Ltd
Priority date: 2014-07-31
Filing date: 2014-07-31
Publication date: 2014-11-26

Abstract

The invention discloses an exhaust pipe auxiliary silencer structure. The auxiliary silencer structure comprises an outer cylinder of a cylinder structure, end covers are arranged at the two ends of the outer cylinder, an inner cylinder penetrates through the end covers, and the space between the outer cylinder and the inner cylinder is filled with a glass wool layer. Honeycomb holes are evenly formed in the left section of the inner cylinder. The invention further discloses a manufacturing technology of the exhaust pipe auxiliary silencer. The manufacturing technology includes the key step of a silencing material layer filling and namely glass wool filling. According to the key step, an auxiliary silencer to be machined is placed on a rotating platform, a clamping head is loaded at the upper end of the inner cylinder, and therefore the upper end of the inner cylinder is sealed; negative-pressure air is communicated inside the outer cylinder; a glass wool jetting device enters the space between the outer cylinder and the inner cylinder; the rotating platform rotates, meanwhile, the glass wool jetting device gradually moves upwards until glass wool filling is finished, and the clamping head is detached. The manufacturing technology of the exhaust pipe auxiliary silencer is simple, the silencing material layer is composed of glass wool, and therefore the problems that original silencing material is disassembled due to influences of high temperature, and the service life is short are solved.

Description

The secondary muffler structure of outlet pipe and manufacturing process thereof

Technical field

The present invention relates to automobile exhaust pipe, refer to particularly the secondary muffler structure of a kind of outlet pipe and manufacturing process thereof.

Background technique

The secondary baffler of outlet pipe (having another name called CHAMBER.EXH) is as the important spare part in outlet pipe noise reduction for the first time during in exhausting air, guarantee outlet pipe abating the noise in the time of discharging waste gas played huge effect, its Main Function and principle: 1. decayed and 2. used sound absorbing material noise reduction by expansion.

The secondary muffler structure of outlet pipe in past is because of its at least two-layer structure, and this style has 3 shortcomings.

First: manufacturing process complexity (1, steel wool twisting cohesion; 2, starching; 3, interior glass wool twisting cohesion; 4, outer glass wool twisting cohesion; 5, three axle starchings; 6, dry; 7, outer barrel two rewinding spot welding/crimpings; 8, glass wool is pressed into; 9, wheel limit; 10, airtight inspection.)

Second: weight increases (structure of at least two-layer quieter material and 2 rewindings can make whole component weight increase).

The the 3rd: cost increases and (because of the complexity of its manufacturing process, impels the quantity of its manufacturing equipment to increase or expensive.In addition, the maintaining expense of multiple equipment also can increase).

The 4th; Operating life is short, and (temperature is higher during due to work in outlet pipe, and the slurry layer that starching forms at high temperature disintegrates gradually.By starching, the fixing quieter material such as steel wool, glass wool of layer progressively disintegrates, fragmentation; From outlet pipe, be discharged to again outside car body; Have a strong impact on the erasure effect of baffler).

Summary of the invention

The first object of the present invention is to provide a kind of secondary muffler structure of outlet pipe that overcomes the short problem of existing baffler operating life.

The first object of the present invention is achieved in the following ways:

The secondary muffler structure of outlet pipe, it comprises the urceolus of cylindrical structure; Described urceolus two ends are provided with lower end cap, upper end cap; There is inner core to run through described upper end cap, lower end cap; Between described urceolus and described inner core, be filled with glass staple layer; Left section of described inner core has been evenly arranged honeycomb hole.

The second object of the present invention is to provide the secondary muffler structure manufacturing process of a kind of outlet pipe.

The second object of the present invention is achieved in the following ways, and comprises the steps:

Step 1: sheet material is rolled into drum, by the drum limit docking of spooling, flanged edge welding is connected together with argon arc welding, become ladle body; By the fixing complementary angle excision on the ladle body welding; Ladle body is put in mould, flattened into predetermined ellipse, form urceolus;

Step 2:: inner core is inserted in the preformed hole of lower end cap, reserves 1-2mm and expose, with pressure welding machine by spot-welded together to inner core and lower end cap; Realize the welding of lower end cap and inner core;

Step 3: the inner core welding with lower end cap point is inserted in urceolus, put into press-in die, lower end cap is pressed into urceolus 4mm left and right;

Step 4: secondary baffler to be processed is placed on rotation platform, loads dop in inner core upper end, make the sealing of inner core upper end; In urceolus, connect air negative pressure; Glass staple injection apparatus enters between urceolus and inner core; Rotation platform rotatablely moves, and glass staple injection apparatus progressively moves upward until by complete the filling of glass staple, unload dop simultaneously;

Step 5: by the urceolus of populated glass wool, put into press-in die, by overlapping to the preformed hole of upper end cap and inner core external diameter, starting device, is pressed into upper end cap;

Step 6: the spot welding one end pressing on the urceolus of upper end cap is put into welding fixture down, start clamp component, starting device starts welding, and the intact parts of the taking-up after having welded are exactly secondary baffler.

Usefulness of the present invention is only to need to use one deck quieter material, manufacturing process simple; And overcome the fixing quieter material of original utilization slurry layer and be subject to the drawback that temperatures involved is disintegrated, operating life, and the erasure effect in later stage has had significantly lifting.

Brief description of the drawings

Fig. 1 is the secondary muffler structure schematic cross-section of outlet pipe of the present invention.

Fig. 2 is the secondary muffler structure perspective view of outlet pipe of the present invention.

Fig. 3 is that the secondary muffler structure glass of outlet pipe of the present invention staple is filled process flow diagram processed.

Fig. 4 is the secondary muffler structure schematic diagram of old-fashioned outlet pipe.

In figure: urceolus 1; End cap 2; Lower end cap 21; Upper end cap 22; Inner core 3; Glass staple layer 4; Honeycomb hole 5; Glass staple injection apparatus 6; Rotation platform 7; Dop 8; Interior glass wool layer 9; Outer glass wool layer 10; Steel wool layer 11.

Embodiment

Below in conjunction with drawings and Examples, the present invention is described in further detail, but this embodiment should not be construed limitation of the present invention.

As shown in drawings, the secondary muffler structure of outlet pipe, it comprises the urceolus 1 of cylindrical structure; Described urceolus 1 two ends are provided with lower end cap 21, upper end cap 22; There is inner core 3 to run through described lower end cap 21, described upper end cap 22; Between described urceolus 1 and described inner core 3, be filled with glass staple layer 4; Left section of described inner core 3 has been evenly arranged honeycomb hole 5.

The secondary muffler structure of outlet pipe, comprises the steps:

Step 1: sheet material is rolled into drum, by the drum limit docking of spooling, flanged edge welding is connected together with argon arc welding, become ladle body; By the fixing complementary angle excision on the ladle body welding; Ladle body is put in mould, flattened into predetermined ellipse, form urceolus 1;

Step 2:: inner core 3 is inserted in the preformed hole of lower end cap 21, reserves 1-2mm and expose, with pressure welding machine by spot-welded together to inner core 3 and lower end cap 21; Realize the welding of lower end cap 21 and inner core 3;

Step 3: by inserting in urceolus 1 with 21 inner cores that weld 3 of lower end cap, put into press-in die, lower end cap 21 is pressed into urceolus 14mm left and right;

Step 4: secondary baffler to be processed is placed on rotation platform 7, loads dop 8 in inner core 3 upper ends, make inner core 3 upper end sealings; In the interior connection air negative pressure of urceolus 1; Glass staple injection apparatus 6 enters between urceolus 1 and inner core 3; Rotation platform 7 rotatablely moves, and glass staple injection apparatus 6 progressively moves upward until by complete the filling of glass staple, unload dop 8 simultaneously;

Step 5: by the urceolus of populated glass wool 1, put into press-in die, by overlapping to the preformed hole of upper end cap 22 and inner core 3 external diameters, starting device, is pressed into upper end cap 22;

Step 6: the spot welding one end pressing on the urceolus 1 of upper end cap 22 is put into welding fixture down, start clamp component, starting device starts welding, and the intact parts of the taking-up after having welded are exactly secondary baffler.

Be below erasure effect laboratory data of the present invention, experimenter tests a large amount of bafflers, and wherein the upper tolerance of volume decay, the lower tolerance of volume decay are the noise reduction experimental result of the best and the poorest baffler of erasure effect in a large amount of samples.And a large amount of data results is concentrated near that is distributed in sample 1, sample 2.Data obtain thus, quantize to produce the requirement that baffler finished product meets erasure effect completely.

Below do not elaborate, be prior art.

Claims

1. the secondary muffler structure of outlet pipe, is characterized in that: it comprises the urceolus (1) of cylindrical structure; Described urceolus (1) two ends are provided with lower end cap (21), upper end cap (22); There is inner core (3) to run through described lower end cap (21) and described upper end cap (22); Between described urceolus (1) and described inner core (3), be filled with glass staple layer (4); Left section of described inner core (3) has been evenly arranged honeycomb hole (5).

2. the secondary muffler structure manufacturing process of outlet pipe, is characterized in that, it comprises the steps:

Step 1: sheet material is rolled into drum, by the drum limit docking of spooling, flanged edge welding is connected together and becomes ladle body with argon arc welding; By the fixing complementary angle excision on the ladle body welding; Ladle body is put in mould and flattened into predetermined ellipse, form urceolus (1);

Step 2: inner core (3) is inserted in the preformed hole of lower end cap (21), reserve 1-2mm and expose, with pressure welding machine, inner core (3) and lower end cap (21) is spot-welded together; Realize the welding of lower end cap (21) and inner core (3);

Step 3: the inner core (3) that will weld with lower end cap (21) point inserts in urceolus (1), puts into press-in die, is pressed into lower end cap (21) to urceolus (1) 4mm left and right;

Step 4: secondary baffler to be processed is placed on to rotation platform (7) upper, loads dop (8) in inner core (3) upper end, make the sealing of inner core (3) upper end; In urceolus (1), connect air negative pressure; Glass staple injection apparatus (6) enters between urceolus (1) and inner core (3); Rotation platform (7) rotatablely moves, and glass staple injection apparatus (6) progressively moves upward until by complete the filling of glass staple, unload dop (8) simultaneously;

Step 5: by the urceolus of populated glass staple (1), put into press-in die, by overlapping to the preformed hole of upper end cap (22) and inner core (3) external diameter, starting device, is pressed into upper end cap (22);

Step 6: the spot welding one end pressing on the urceolus (1) of upper end cap (22) is put into welding fixture down, start clamp component, starting device starts welding, and the intact parts of the taking-up after having welded are exactly secondary baffler.