METHOD FOR MANUFACTURING A MUFFIN AND THE MUFFIN

Abstract

The present invention relates to a method for manufacturing a silencer and a silencer, which is at least composed of a first end cover and a second end cover assembled to form a closed silencer chamber, the silencer chamber having a first axial direction; a silencer pipe is arranged in the silencer chamber, the silencer pipe is supported by a support system that guides the silencer pipe to exist in a corresponding steady state, the support system separates the silencer chamber along the first axial direction to form an air intake chamber and an injection buffer chamber, the injection buffer chamber and the air intake chamber are connected by a throttling system; the air intake chamber is provided with an air intake system for connecting to the outside, and the air intake system has the characteristics of guiding exhaust gas into the air intake chamber and rotating around the first axial direction; the silencer pipe guides the gas in the injection buffer chamber to flow into the silencer pipe through the air guide hole and then be discharged. The present invention adopts a deep drawing integrated molding process to manufacture the end cover, the product quality is stable and reliable, the process is simple, it is conducive to modular development and design, and the standardized interchangeability of the product is achieved. The silencer has improved noise reduction performance and good practicality and economy.

Description

Technical Field

[0001] The present invention relates to the technical field of mufflers, and in particular to the technical field of mufflers for exhaust gas treatment systems of locomotives and small and medium-sized generators. Background Art

[0002] Currently, users of generator sets, construction machinery, agricultural machinery, all-terrain vehicles, and garden tools are increasingly demanding greater control over noise and air pollution. Consequently, the functional and quality requirements for mufflers used in these applications are also increasing. However, existing mufflers used in exhaust gas treatment systems for locomotives and small and medium-sized generators primarily feature a one-piece housing, making assembly of internal components difficult and limiting the muffler's internal design and expansion. Furthermore, gas typically enters from one end of the muffler housing and exits from the other, resulting in inadequate noise reduction. Summary of the Invention

[0003] The object of the present invention is to provide a method for manufacturing a silencer and a silencer, which can well solve the above technical problems, be simple to manufacture, and have good scalability and noise reduction properties.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a method for manufacturing a silencer, which is to construct a closed silencer chamber, which is formed by at least a first end cover and a second end cover being assembled and enclosed, and the silencer chamber obtains a first axial direction that guides the extension of the silencer chamber according to the mutual assembly direction of the first end cover and the second end cover; at least one silencer pipe is arranged in the silencer chamber, and the silencer pipe is supported by a support system that guides the silencer pipe to exist in a corresponding steady state in the silencer chamber, and the support system separates the silencer chamber along the first axial direction to form an intake chamber and an injection buffer chamber, and the injection buffer chamber is connected to the intake chamber through a throttling system; the intake chamber is provided with an intake system for connecting to the corresponding external exhaust gas, and the intake system has the characteristic of guiding the exhaust gas to enter the intake chamber and rotate around the first axial direction; the silencer pipe is provided with at least a first radial air guide hole, and the first radial air guide hole is located in the injection buffer chamber, and the silencer pipe is extended along the first axial direction and guides the gas in the injection buffer chamber to pass through the first radial air guide hole into the silencer pipe and then be discharged.

[0005] The above scheme is further that the support system includes a first support member and a second support member, which are arranged at intervals in the first axial direction and thereby separate the silencing chamber along the first axial direction to form an air intake chamber and an injection buffer chamber, and the injection buffer chamber is located between the first support member and the second support member, and the first end cover and the second end cover are made based on a deep drawing one-piece molding process, so that the first end cover and the second end cover are both U-shaped structures, and the opening ends of the first end cover and the second end cover are partially overlapped with each other; the deep drawing one-piece molding process adopts step-by-step stretching, the first stretching is a negative gap stretching, the upper and lower mold gaps are less than the thickness of the stretched part plate, the stretching ratio H / D ≥ 1.3, H is the height of the stretched part, D is the diameter of the stretched part or the diagonal length, and after the first stretching, the surface temperature of the product is above 75 degrees Celsius; the second stretching forms the arc top feature and the guide positioning feature of the product; the third stretching enters the shaping process to form the internal and external dimensions of the product, and obtains a tight connection structure that ensures the air tightness of the sleeve.

[0006] The above scheme is further that the support system includes a first support member and a second support member, and the soundproof chamber is formed by sequentially assembling and enclosing a first end cover, a first support member and a second end cover, and the first end cover, the first support member and the second end cover are manufactured based on a deep drawing one-piece molding process, so that the first end cover, the first support member and the second end cover are all U-shaped structures, and the first end cover, the first support member and the second end cover are partially overlapped with each other in sequence; the first support member and the second support member separate the soundproof chamber along the first axial direction to form an air intake chamber and an injection buffer chamber, and the injection buffer chamber is located between the first support member and the second support member. The deep drawing one-piece molding process adopts step-by-step stretching, the first stretching is a negative gap stretching, the upper and lower mold gaps are less than the thickness of the stretched part, the stretching ratio H / D ≥ 1.3, H is the height of the stretched part, D is the diameter of the stretched part or the diagonal length, and after the first stretching, the surface temperature of the product is above 75 degrees Celsius; the second stretching forms the arc top feature and the guide positioning feature of the product; the third stretching enters the shaping process to form the internal and external dimensions of the product, and obtains a tight connection structure that ensures the air tightness of the sleeve.

[0007] The above scheme is further that the support system includes a first support member, a second support member and a third support member, the muffler chamber is formed by sequentially assembling and enclosing the first end cover, the first support member, the third support member and the second end cover, the third support member is embedded between the first support member and the second support member, the first support member and the second support member separate the muffler chamber along the first axial direction to form an air inlet chamber and an injection buffer chamber, the injection buffer chamber is located between the first support member and the second support member, the third support member further separates the injection buffer chamber into two connected sections, and between the third support member and the second support member The injection buffer chamber adopts an air guide system based on the Venturi principle to guide the gas in the injection buffer chamber into the silencer pipe; the first end cover, the first support member, the third support member and the second end cover are manufactured based on the deep drawing one-piece molding process, and the first end cover, the first support member, the third support member and the second end cover are all U-shaped structures, and the first end cover, the first support member, the third support member and the second end cover are partially overlapped with each other in sequence; the deep drawing one-piece molding process adopts step-by-step stretching, the first stretching is negative gap stretching, the upper and lower mold gaps are less than the thickness of the stretched part, the stretching ratio H / D ≥ 1.3, H is the height of the stretched part, D is the diameter of the stretched part or the diagonal length, and after the first stretching, the surface temperature of the product is above 75 degrees Celsius; the second stretching forms the arc top feature and the guide positioning feature of the product; the third stretching enters the shaping process to form the internal and external dimensions of the product, and obtains a tight connection structure that ensures the air tightness of the sleeve.

[0008] The above solution is further provided that the time difference between the first stretching and the second stretching, and the time difference between the second stretching and the third stretching must satisfy the requirement that the surface temperature of the product is controlled above 65 degrees Celsius during the latter stretching.

[0009] To achieve the above object, the present invention provides a muffler having:

[0010] A first end cap, which is a U-shaped structure formed by a deep drawing integral molding process;

[0011] A second end cap, which is a U-shaped structure formed by a deep drawing integral molding process;

[0012] A closed soundproofing chamber, the soundproofing chamber is formed by at least a first end cover and a second end cover being assembled and enclosed, and the soundproofing chamber obtains a first axial direction that guides the extension of the soundproofing chamber according to the mutual assembly direction of the first end cover and the second end cover; at least one soundproofing pipe is arranged in the soundproofing chamber, and the soundproofing pipe is supported by a support system that guides the soundproofing pipe to exist in a corresponding stable state in the soundproofing chamber, and the support system includes at least a first support member and a second support member, and the first support member and the second support member are arranged at intervals in the first axial direction and thereby separate the soundproofing chamber along the first axial direction to form an air intake chamber and an injection buffer chamber, and the injection buffer chamber is located between the first support member and the second support member, and the air intake chamber is arranged at both ends of the injection buffer chamber along the first axial direction, and the injection buffer chamber It is connected to the air intake chamber through a throttling system, and the throttling system is arranged on the first support member and the second support member; the air intake chamber is provided with an air intake system for connecting with the corresponding external exhaust gas, and the air intake system has the characteristic of guiding the exhaust gas into the air intake chamber and rotating around the first axial direction, the air intake system includes an air inlet and an external duct, and the air inlet is opened on the outer peripheral surface of the first end cover and the second end cover; the silencer is provided with a first radial air guide hole, and the first radial air guide hole is located in the injection buffer chamber, the silencer extends along the first axial direction and guides the gas in the injection buffer chamber to pass through the first radial air guide hole into the silencer and then be discharged, and the discharge direction is parallel to the first axial direction or forms an angle with the first axial direction.

[0013] The above scheme is further that the open ends of the first end cover and the second end cover are partially overlapped and sleeved with each other, and the open end of the first end cover is provided with a first sleeve lip, which sleeves the open end of the second end cover and overlaps and surrounds the outer periphery of the second end cover; the end of the second end cover away from the first end cover is provided with a pipe outlet hole, and the pipe outlet hole is used for one end of the silencer to extend to discharge gas, while the other end of the silencer is sealed by a shrinkage tail; the first support member and the second support member are disc-shaped or U-shaped, the first support member is located in the first end cover, and the second support member is located in the second end cover, and the outer diameters of the first support member and the second support member respectively match the inner diameters of the first end cover and the second end cover, so that the first support member is tightly embedded in the first end cover, and the second support member is tightly embedded in the second end cover; the throttling system is a first throttling hole arranged on the first support member and a second throttling hole on the second support member, and the first throttling hole and the second throttling hole are distributed around the first axial direction.

[0014] The above scheme is further that the first support member is a U-shaped structure formed based on a deep drawing one-piece molding process; the second support member is embedded in the open end of the first support member; the second support member is disc-shaped or U-shaped, and the outer diameter of the second support member matches the inner diameter of the first support member, so that the second support member and the first support member are tightly embedded; the first end cover, the first support member and the second end cover are partially overlapped with each other in sequence, and the open end of the first end cover is provided with a first sleeve lip, which sleeves the inner bottom end of the first support member and overlaps and surrounds the outer periphery of the first support member; the open end of the second end cover is provided with a second sleeve lip, which sleeves the first support member. The open end of the support member overlaps and surrounds the outer circumference of the first support member, so that the first end cover, the first support member and the second end cover together form a silencer chamber, the second support member and the inner bottom of the first support member are spaced apart in the first axial direction, and thus the silencer chamber is separated along the first axial direction to form an air intake chamber and an injection buffer chamber, the throttling system is a first throttling hole arranged on the inner bottom of the first support member and a second throttling hole on the second support member, and the first throttling hole and the second throttling hole are distributed around the first axial direction; the end of the second end cover away from the first end cover is provided with an outlet hole, and the outlet hole is for one end of the silencer pipe to extend out to discharge gas, while the other end of the silencer pipe is sealed with a shrinkage tail.

[0015] The above scheme is further that the support system also includes a third support member, which is arranged between the first support member and the second support member, and the first support member and the third support member are both U-shaped structures formed based on a deep drawing one-piece molding process; the second support member is embedded in the open end of the third support member; the second support member is disc-shaped or U-shaped, and the outer diameter of the second support member matches the inner diameter of the third support member, so that the second support member and the third support member are tightly embedded; the first end cover, the first support member, the third support member and the second end cover are partially overlapped with each other in sequence, and the open end of the first end cover is provided with a first sleeve lip, which sleeves the inner bottom end of the first support member and overlaps and surrounds the outer periphery of the first support member; the open end of the first support member is sleeved with the inner bottom end of the third support member; the open end of the second end cover is provided with a second sleeve lip, which sleeves the open end of the third support member and overlaps and surrounds the outer periphery of the third support member, so that the first end cover, the first support member, the third support member and the second end cover together form a soundproof chamber, which is formed according to the first end cover, the first support member, The mutual assembly direction of the third support member and the second end cover obtains the first axial direction for guiding the extension of the silencer chamber; the silencer pipe is supported by the first support member, the second support member and the third support member in the silencer chamber, the second support member and the inner bottom of the first support member are arranged at intervals in the first axial direction and thereby divide the silencer chamber along the first axial direction to form an air inlet chamber and an injection buffer chamber, the injection buffer chamber is located in the first support member and the second support member, the inner bottom of the third support member further divides the injection buffer chamber into two connected sections, and a Venturi principle-based air guide system is used in the injection buffer chamber between the third support member and the second support member to guide the gas in the injection buffer chamber into the silencer pipe; the throttling system is a first throttling hole arranged on the inner bottom of the first support member, a second throttling hole of the second support member and a third throttling hole on the inner bottom of the third support member, and the first throttling hole, the second throttling hole and the third throttling hole are all distributed around the first axial direction; the end of the second end cover away from the first end cover is provided with an outlet hole, the outlet hole is for one end of the silencer pipe to extend out to discharge gas, and the other end of the silencer pipe is sealed with a shrinkage tail.

[0016] The above scheme is further that the air guide system based on the Venturi principle has a sleeve protruding from the inner bottom of the third support member toward the second support member, and a gap is left between the outer protruding end of the sleeve and the second support member. The sleeve is connected to the silencer pipe, and a gap is left between the inner wall of the sleeve and the outer wall of the silencer pipe. The silencer pipe is also provided with a second radial air guide hole, and the second radial air guide hole is located inside the sleeve.

[0017] The technical solution of the present invention has the following advantages:

[0018] 1. The combined enclosure forms an anechoic chamber, obtaining a multi-section modular structure, which is convenient for assembling internal components and has good scalability to meet market needs.

[0019] 2. The deep drawing one-piece molding process is used for production, and the product quality is stable and reliable, the process is simple, the investment cost is low, and it is conducive to modular development and design, achieving standardized interchangeability of products and improving the production and application of silencers.

[0020] 3. The multifunctional integrated design of the support combines the functions of the shell and the partition, has good structural and sealing properties, and reduces the processing and use of parts. It has the advantages of providing economy and large-scale automated mass production, so that the silencer products can be fully automated, thereby greatly improving production efficiency and reducing production costs.

[0021] 4. Changing the direction and shape of the airflow and adding a discontinuous silencer system further improves the silencer's noise reduction performance. It has good practicality and economy and is more suitable for use in locomotive / small and medium-sized generator exhaust treatment systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attachment Figure 1 This is a schematic structural diagram of one embodiment of the present invention;

[0023] Attachment Figure 2 for Figure 1 A schematic diagram of the internal assembly structure of the embodiment;

[0024] Attachment Figure 3 This is a schematic structural diagram of a second embodiment of the present invention;

[0025] Attachment Figure 4 for Figure 2 A schematic diagram of the internal assembly structure of the embodiment;

[0026] Attachment Figure 5 Schematic diagram of the structure of the third embodiment of the present invention;

[0027] Attachment Figure 6 for Figure 5 A schematic diagram of the internal assembly structure of the embodiment;

[0028] Attachment Figure 7 Schematic diagram of the structure of the fourth embodiment of the present invention;

[0029] Attachment Figure 8 This is a schematic diagram of the assembly welding of the present invention;

[0030] Attachment Figure 9 This is a schematic diagram of polishing and oiling after assembly and welding of the present invention;

[0031] Attachment Figure 10 、 11 This is a schematic diagram of the application of the muffler of the present invention. DETAILED DESCRIPTION

[0032] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0033] It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] See Figures 1 to 7As shown, the present invention proposes a method for manufacturing a silencer, which is to construct a closed silencer chamber 100, which is formed by at least a first end cover 1 and a second end cover 2. The silencer chamber 100 obtains a first axial direction that guides the extension of the silencer chamber according to the mutual connection direction of the first end cover 1 and the second end cover 2; a silencer pipe 3 is set in the silencer chamber. The silencer pipe in the embodiment in the figure is a straight pipe. Of course, according to needs, the silencer pipe can also be designed as multiple straight pipes in parallel or in series, and even the silencer pipe can be a bent pipe body. As long as it can achieve the effect of silencing and reducing noise, there is no limitation here. The silencer pipe is supported in the silencer chamber by a support system that guides the silencer pipe to exist in a corresponding stable state, ensuring that the silencer pipe 3 is relatively fixed in the silencer chamber and presents a designed shape. The present invention further utilizes this support system to separate the muffler chamber along the first axial direction into an intake chamber 101 and an ejection buffer chamber 102. The ejection buffer chamber 102 is connected to the intake chamber 101 via a throttling system. This creates different airflow patterns in the intake and ejection buffer chambers 101 and 102, increasing impedance and thereby enhancing noise reduction. The structure is simple, compact, and easy to manufacture. The intake chamber 101 of the present invention is equipped with an intake system for connecting to external exhaust gas, which can be connected to an exhaust treatment system for locomotives or small and medium-sized generators. The intake system guides exhaust gas into the intake chamber and rotates about the first axial direction. This increases gas flow distance and mutual collision and friction between gases, reducing airflow energy and attenuating sound wave intensity, thereby enhancing noise reduction. The muffler pipe 3 is provided with a first radial air guide hole 31 located within the ejection buffer chamber 102. The muffler pipe 3 extends along the first axial direction and guides gas within the ejection buffer chamber through the first radial air guide hole into the muffler pipe for discharge. While muffler pipe 3 functions as a discharge channel, it also changes the cross-sectional area of ​​the airflow. This design utilizes radial input from first radial air guide holes 31, similarly throttling the flow, followed by axial output, extending the flow distance. This configuration not only enhances noise reduction but also achieves effective discharge, preventing accumulation and blockage. In this embodiment, first radial air guide holes 31 are arranged around the outer circumference of muffler pipe 3, distal from the discharge end.

[0035] See Figure 1 、 2As shown, in this embodiment, the support system includes a first support member 4 and a second support member 5, which are arranged at intervals in the first axial direction and thereby separate the muffler chamber along the first axial direction to form an air inlet chamber and an ejection buffer chamber, and the ejection buffer chamber 102 is located between the first support member 4 and the second support member 5. The first end cap 1 and the second end cap 2 are manufactured based on a deep drawing integral molding process, so that the first end cap and the second end cap are both U-shaped structures, and the opening ends of the first end cap and the second end cap partially overlap each other. The deep drawing integral molding process adopts a step-by-step stretching process. The first stretching is a negative gap stretching, and the gap between the upper and lower dies is less than the thickness of the drawn piece. The stretching ratio H / D ≥ 1.3, H is the height of the drawn piece, and D is the diameter or diagonal length of the drawn piece. After the first stretching, the surface temperature of the product is above 75 degrees Celsius; the second stretching forms the arc top feature and the guide positioning feature of the product; the third stretching enters the shaping process to form the internal and external dimensions of the product, and obtain a tight connection structure that ensures the airtightness of the sleeve.

[0036] See Figure 3 、 4 As shown, in this embodiment, the support system includes a first support member 4 and a second support member 5, and the soundproofing chamber 100 is formed by sequentially assembling and enclosing a first end cover 1, a first support member 4 and a second end cover 2. The first end cover 1, the first support member 4 and the second end cover 2 are manufactured based on a deep drawing one-piece molding process, so that the first end cover, the first support member and the second end cover are all U-shaped structures, and the first end cover, the first support member and the second end cover are partially overlapped with each other in sequence; the first support member 4 and the second support member 5 separate the soundproofing chamber 100 along the first axial direction to form an air intake chamber 101 and an injection buffer chamber 102, and the injection buffer chamber 102 is located between the first support member 4 and the second support member 5. Step-by-step stretching is adopted in the deep drawing one-piece molding process. The first stretching is a negative gap stretching. The gap between the upper and lower dies is less than the thickness of the stretched part. The stretching ratio H / D ≥ 1.3 , H is the height of the stretched part, D is the diameter or diagonal length of the stretched part, and after the first stretching, the surface temperature of the product is above 75 degrees Celsius; the second stretching forms the arc top feature and the guide positioning feature of the product; the third stretching enters the shaping process to form the internal and external dimensions of the product and obtain a tight connection structure that ensures the air tightness of the socket.

[0037] See Figure 5 、 6As shown, in this embodiment, the support system includes a first support member 4, a second support member 5 and a third support member 6, and the soundproofing chamber 100 is formed by sequentially assembling and enclosing the first end cover 1, the first support member 4, the third support member 6 and the second end cover 2, and the third support member 6 is embedded between the first support member 4 and the second support member 5. The first support member 4 and the second support member 5 separate the soundproofing chamber along the first axial direction to form an air intake chamber 101 and an injection buffer chamber 102. The injection buffer chamber is located between the first support member and the second support member, and the third support member 6 further separates the injection buffer chamber 102 into two connected sections, and the injection buffer chamber between the third support member 6 and the second support member 5 adopts a Venturi principle-based air guide system to guide the gas in the injection buffer chamber into the silencer pipe 3, thereby changing the airflow pattern, effectively weakening the sound waves, and thereby improving the sound insulation effect. The first end cap 1, the first support member 4, the third support member 6 and the second end cap 2 are manufactured based on a deep drawing integrated molding process, so that the first end cap, the first support member, the third support member and the second end cap are all U-shaped structures, and the first end cap, the first support member, the third support member and the second end cap are partially overlapped in sequence. The deep drawing integrated molding process adopts a step-by-step stretching process. The first stretching is a negative gap stretching, the gap between the upper and lower molds is less than the thickness of the stretched part, the stretching ratio H / D ≥ 1.3, H is the height of the stretched part, D is the diameter or diagonal length of the stretched part, and after the first stretching, the surface temperature of the product is above 75 degrees Celsius; the second stretching forms the arc top feature and the guide positioning feature of the product; the third stretching enters the shaping process to form the internal and external dimensions of the product, and obtain a tight connection structure that ensures the airtightness of the sleeve.

[0038] The present invention uses a deep drawing process to produce the first end cap, the second end cap, and the corresponding first and third support members, effectively improving the quality and stability, thereby enhancing the quality and consistency of the muffler product. For hardware with a D value range of 100-210mm, an extremely large stretching ratio is a difficulty. Conventional stretching is difficult to achieve high product quality. For this reason, a step-by-step stretching process is proposed based on the existing stretching process. The first stretching is a negative gap stretching, in which the gap between the upper and lower molds is less than the thickness of the stretched part. The stretching ratio H / D ≥ 1.3, and after the first stretching, the surface temperature of the product is above 75 degrees Celsius, thereby improving the ductility of the stretched part itself; the second stretching forms the arc top feature and the guide positioning feature of the product to ensure the accuracy of the deep drawing; the third stretching enters the shaping process to form the internal and external dimensions of the product, obtaining a tight connection structure that ensures the airtightness of the sleeve, and ensuring the quality of subsequent matching assembly. The time difference between the first and second stretches, and between the second and third stretches, is required to ensure that the product surface temperature is above 65 degrees Celsius during the latter stretch. This ensures stretch continuity, reduces stress effects, and ensures stable product quality. During production, the material transfer process, such as a relatively closed stretching environment and insulated clamping arm design, ensures that the product surface temperature is above 65 degrees Celsius during the latter stretch, thereby ensuring the quality of the integrated second and third deep draws.

[0039] See Figure 8 、 9 As shown, the present invention further adopts a mechanical automatic combination when the first end cover 1, the second end cover 2 and the corresponding first support member 4 and the third support member 6 are assembled and enclosed. Figure 8 The assembly welding device 200 shown is used to connect the first end cap 1, the second end cap 2 and the corresponding first support member 4 and the third support member 6, and adopts Figure 9The polishing and oil drying device 300 shown performs surface treatment after assembly and welding. The assembly and welding device 200 includes a docking module 201, a conveyor module 202, and a welding module 203. The docking module 201 includes a left-right abutting jig that allows for precise alignment and assembly of interconnected components, effectively eliminating stress effects, improving assembly accuracy and stability, and thus enhancing subsequent welding quality and airtightness. The conveyor module 202 connects the workstations of the docking module 201 and the welding module 203, transferring the docked product from the docking module 201 to the workstation of the welding module 203. The welding module 203 includes a welding gun, a pressure roller, and a rotary drive assembly to press and weld the product at the welding position, as well as drive the product to rotate for continuous circumferential welding. After welding is completed, the product is transferred to the polishing and oil drying device 300 for surface treatment. The polishing and oil drying device 300 sequentially includes the polishing module 301, the oiling module 302, and the drying module 303, along with corresponding transmission mechanisms to enable continuous operation. Polishing module 301 uses the product's rotation and friction with a polishing wheel to remove excess solder and improve airtightness at welded areas. Oiling module 302 applies oil to the polished areas using a rotating brushing method, extending their lifespan and further enhancing their sealing. Drying module 303 wraps the product around the oiling area and heats it to remove moisture, ensuring the protective oil adheres tightly to the surface.

[0040] The present invention uses a modular enclosure to form a silencer chamber, obtaining a multi-stage modular structure that is convenient for assembling internal components and has good scalability to meet market needs. The corresponding components are manufactured based on a deep-drawing process, and mechanized assembly is adopted to achieve automated modular assembly, full-robot welding, etc., which reduces manual labor while greatly improving production efficiency and product quality. The product quality is stable and reliable, the process is simple, and the investment cost is low, which is conducive to modular development and design, and improves the production and application of silencers. This solves the problem that current silencers for locomotives / small and medium-sized generators are of various types, difficult to assemble, and are basically customized. Different internal air chambers are formed by standardized modules with two-stage, three-stage, four-stage, or even five-stage appearances, so that they can be quickly adapted to locomotives and small and medium-sized generators with different power and different silencer requirements. The problem of product airtightness is solved from the perspective of manufacturing and assembly. The airtightness of products manufactured through deep drawing is significantly improved, the service life is long, and they have good economic efficiency.

[0041] See Figures 1 to 7As shown, the present invention proposes a muffler comprising a first end cap 1 and a second end cap 2. Both the first end cap 1 and the second end cap 2 are U-shaped structures formed using a deep-drawing integral molding process. The muffler also includes a closed muffler chamber 100, which is formed by at least the first end cap 1 and the second end cap 2 being joined together. The muffler chamber 100 has a first axial direction that guides its extension, according to the direction in which the first end cap 1 and the second end cap 2 are joined together. At least one muffler pipe 3 is provided in the muffler chamber 100. The muffler pipe 3 is supported in the muffler chamber by a support system that guides the muffler pipe to exist in a corresponding stable state. The support system includes at least a first support member 4 and a second support member 5. The first support member 4 and the second support member 5 are spaced apart in the first axial direction and thereby separate the muffler chamber along the first axial direction into an air intake chamber 101 and an ejection buffer chamber 102. The ejection buffer chamber 102 is located between the first support member 4 and the second support member 5. The air intake chamber 101 is provided at both ends of the ejection buffer chamber 102 along the first axial direction. The ejection buffer chamber 102 and the air intake chamber 101 are connected by a throttling system, and the throttling system is provided on the first support member 4 and the second support member 5. The air intake chambers 101 at both ends of the ejection buffer chamber 102 are throttled by the throttling system and then enter the ejection buffer chamber 102 for buffering and mixing. The two ends of the ejection buffer chamber relative to each other intake air. According to the airflow characteristics, the gases at both ends will also relatively impact and mix in the ejection buffer chamber, thereby increasing impedance, attenuating fluid energy, and further reducing noise. The air intake chamber 101 is provided with an air intake system for connecting to the corresponding external exhaust gas, and the air intake system has the characteristics of guiding the exhaust gas into the air intake chamber and rotating around the first axial direction. The air intake system includes an air intake port 81 and an external conduit 82. The air intake port 81 is opened on the outer peripheral surface of the first end cover 1 and the second end cover 2. In this embodiment, one end of the external conduit 82 is welded to the first end cover 1 or the second end cover 2 corresponding to the air intake port 81. In actual assembly, reinforcements can be added to the inner and / or outer sides of the first end cover 1 and the second end cover 2 to cooperate with the welding of the external conduit 82 to improve the connection firmness of the external conduit 82 and prevent damage such as shaking. The air intake system takes in air in a tangential direction relative to the first end cover 1 and the second end cover 2. In conjunction with the curved inner walls of the first end cover 1 and the second end cover 2, the exhaust gas is guided into the air intake chamber and rotates around the first axis to form a bypass flow, thereby achieving rotational collision and deceleration of the exhaust gas in the air intake chamber, weakening the sound waves. For the same engine under the same conditions, the back pressure can be reduced by at least 12% and the low-frequency noise can be significantly improved. The decelerated exhaust gas is then throttled by the throttling system into the injection buffer chamber 102, which greatly improves the airflow. The muffler 3 is provided with a first radial air guide hole 31, which is located in the injection buffer chamber 102, so that the exhaust gas in the injection buffer chamber 102 enters the muffler 3 through the first radial air guide hole 31 under the action of positive pressure.The silencer pipe 3 extends along the first axial direction and guides the gas in the injection buffer chamber to flow into the silencer pipe through the first radial air guide hole and then be discharged. The discharge direction is parallel to the first axial direction or forms an angle with the first axial direction. Figures 1 to 6 The discharge is shown in the first axial direction, and one end of the silencer pipe 3 extends out from the second end cover 2 to achieve the silencer function. Of course, according to assembly requirements, the silencer pipe 3 can also be discharged from the first end cover or the middle part between the first end cover and the second end cover, such as Figure 7 As shown, the discharge end of the silencer pipe 3 extends out from the first support member 4, and the discharge direction forms an angle with the first axial direction, which can be an acute angle, a right angle or an obtuse angle. Figure 7 The example shown is the vertical first axial discharge. The silencer pipe 3 of this embodiment is T-shaped, including a first pipe section and a second pipe section perpendicular to each other, wherein the first pipe section is parallel to the first axial direction and performs tail sealing on both ends. The tail sealing can be achieved by a multi-grab tightening method, and there is no need to assemble the corresponding baffle welding, which is optimized for production and has good sealing. The second pipe section is perpendicular to the first axial direction and has a discharge end extending to the first support member 4. The above is only an explanation of the preferred embodiment and does not limit the scope of protection. Of course, the silencer pipe 3 can also be designed to be L-shaped, S-shaped, etc., and will not be illustrated here one by one. The first radial air guide hole 31 is away from the discharge end of the silencer pipe 3, and the first radial air guide hole 31 is distributed along the periphery of the silencer pipe 3. The silencer pipe 3 is supported by a support system so that it exists in the silencer chamber 100 in a relatively suspended state. Figures 1 to 6 In a further embodiment, the muffler pipe 3 is a straight pipe, and the muffler pipe 3 is coaxial with the muffler chamber 100, which can improve the balance of the air intake of the muffler pipe 3.

[0042] See Figure 1 、 2As shown, in this embodiment, the open ends of the first end cover 1 and the second end cover 2 are partially overlapped and sleeved with each other, and the open end of the first end cover 1 is provided with a first sleeve lip 11, and the first sleeve lip 11 sleeves the open end of the second end cover and overlaps and surrounds the outer periphery of the second end cover; the end of the second end cover 2 away from the first end cover is provided with a pipe outlet hole 21, and the pipe outlet hole 21 is for one end of the silencer pipe 3 to extend to discharge gas, while the other end of the silencer pipe 3 is sealed by shrinkage. This embodiment adopts a multi-grab tightening method to achieve shrinkage sealing to achieve the corresponding end sealing of the silencer pipe 3. There is no need to assemble the corresponding baffle welding, and the production is optimized and the sealing is good. The first support member 4 and the second support member 5 are disc-shaped or U-shaped. The first support member 4 is located in the first end cover 1, and the second support member 5 is located in the second end cover 2. The outer diameters of the first support member 4 and the second support member 5 match the inner diameters of the first end cover 1 and the second end cover 2, respectively, so that the first support member 4 and the first end cover 1 are tightly engaged, and the second support member 5 and the second end cover 2 are tightly engaged, thereby achieving the first support member 4 and the second support member 5 separating the muffler chamber 100. In this embodiment, the throttling system is a first throttling hole 41 provided on the first support member 4 and a second throttling hole 51 provided on the second support member 5. The first throttling hole 41 and the second throttling hole 51 are distributed around the first axial direction to achieve uniform distribution of gas in the intake chamber into the injection buffer chamber.

[0043] See Figure 3 、 4As shown, in this embodiment, the first support member 4 is a U-shaped structure formed by a deep drawing integral molding process; the second support member 5 is embedded in the open end of the first support member 4; the second support member 5 is disc-shaped or U-shaped, and the outer diameter of the second support member 5 matches the inner diameter of the first support member, so that the second support member 5 and the first support member 4 are tightly embedded. The first end cover 1, the first support member 4, and the second end cover 2 are partially overlapped with each other in sequence. The open end of the first end cover is provided with a first sleeve lip 11. The first sleeve lip 11 sleeves onto a first step feature 42 preset on the outer periphery of the inner bottom end of the first support member 4. The first step feature 42 is designed by shrinking and limiting stretching to provide assembly alignment and increase the sealing area, thereby improving airtightness. The open end of the second end cover 2 is provided with a second sleeve lip 22, which sleeves the open end of the first support member 4 and overlaps and surrounds the outer periphery of the first support member, so that the first end cover 1, the first support member 4 and the second end cover 5 together form a silencer chamber 100, and the second support member 5 and the inner bottom of the first support member 4 are spaced apart in the first axial direction and thereby the silencer chamber 100 is separated along the first axial direction to form an air intake chamber 101 and an injection buffer chamber 102, and the throttling system is a first throttling hole 41 arranged on the inner bottom of the first support member and a second throttling hole 51 on the second support member, and the first and second throttling holes are distributed around the first axial direction; the end of the second end cover away from the first end cover is provided with a pipe outlet 21, and the pipe outlet 21 is for one end of the silencer pipe 3 to extend to discharge gas, while the other end of the silencer pipe is sealed with a shrinkage tail.

[0044] See Figure 5 、 6As shown, in this embodiment, the support system also includes a third support member 6, which is arranged between the first support member 4 and the second support member 5. The first support member 4 and the third support member 6 are both U-shaped structures formed by a deep drawing integral molding process. The second support member 5 is embedded in the open end of the third support member 6; the second support member 5 is disc-shaped or U-shaped, and the outer diameter of the second support member 5 matches the inner diameter of the third support member 6, so that the second support member 5 and the third support member 6 are tightly embedded. The first end cap 1, the first support member 4, the third support member 6, and the second end cap 2 are partially overlapped with each other in sequence. The open end of the first end cap is provided with a first sleeve lip 11, which sleeves the inner bottom end of the first support member 4 and overlaps and surrounds the outer periphery of the first support member; the open end of the first support member 4 sleeves the third step feature 63 preset on the outer periphery of the inner bottom end of the third support member 6. The third step feature 63 is designed by shrinking and limiting stretching to provide assembly alignment and increase the sealing area, thereby improving airtightness. The open end of the second end cap 2 is provided with a second sleeve lip 22, which sleeves onto the open end of the third support member and overlaps and surrounds the outer circumference of the third support member 6. Appropriate positioning steps are provided during assembly to facilitate sleeve engagement and achieve appropriate positioning and bonding strength. The first end cap 1, first support member 4, third support member 6, and second end cap 2 together form a soundproofing chamber 100. The soundproofing chamber 100 has a first axial direction that guides the extension of the soundproofing chamber, depending on the direction of mutual assembly of the first end cap 1, first support member 4, third support member 6, and second end cap 2. The silencer 3 is supported in the silencer chamber by a first support member 4, a second support member 5 and a third support member 6. The second support member 5 and the inner bottom of the first support member 4 are spaced apart in the first axial direction, thereby dividing the silencer chamber along the first axial direction into an air intake chamber 101 and an injection buffer chamber 102. The injection buffer chamber 102 is located in the first support member 4 and the second support member 5. The inner bottom of the third support member 6 forms a partition to further divide the injection buffer chamber into two connected sections. A third throttling hole 61 is provided on the inner bottom of the third support member 6 to increase impedance, and a Venturi principle-based air guide system is used in the injection buffer chamber between the third support member 6 and the second support member 5 to guide the gas in the injection buffer chamber into the silencer 3.The Venturi-based air guide system comprises a sleeve 62 extending from the inner bottom of the third support member toward the second support member. A gap is left between the outer protruding end of the sleeve 62 and the second support member 5, forming a gas inlet. The sleeve 62 is sleeved onto the silencer pipe 3, and a gap is left between the inner wall of the sleeve 62 and the outer wall of the silencer pipe, thereby shrinking the space and satisfying the gas flow. The silencer pipe 3 is also provided with a second radial air guide hole 32, which is located within the sleeve 62. In the embodiment shown in the figure, the second radial air guide hole 32 is in the form of an elongated hole. The airflow is relieved by the side overflow into the space formed by the inner wall of the sleeve 62 and the outer wall of the silencer pipe, thereby eliminating sound resonance. The airflow inside the silencer pipe can generate a negative pressure between the inner wall of the sleeve 62 and the outer wall of the silencer pipe. Combined with the positive pressure intake provided by the air inlet chamber, while satisfying the requirements of changing the airflow direction and cross-sectional area, it can also ensure the continuous movement of the gas in the silencer chamber, achieving the ideal sound attenuation and noise reduction effect. The structure is simple and reasonable, which helps to improve the practicality and economy of the silencer. The air guide system based on the Venturi principle helps to eliminate sound resonance and achieve a harmonic effect. The throttling system of this embodiment is provided with a first throttling hole 41 on the inner bottom of the first support member 4, a second throttling hole 51 on the second support member 5, and a third throttling hole 61 on the inner bottom of the third support member 6. The first, second, and third throttling holes are relatively distributed around the first axial direction to evenly throttle the intake air; the end of the second end cover 2 away from the first end cover is provided with an outlet hole 21, and the outlet hole 21 is provided for one end of the muffler pipe 3 to extend to discharge gas, while the other end of the muffler pipe 3 is sealed with a shrink tail to seal and change the direction of the airflow.

[0045] The silencer of the present invention adopts a combined enclosure to form a silencer chamber, obtaining a multi-stage modular structure, which is convenient for assembling internal parts and has good scalability to meet market needs. And through effective structural design, the direction and form of the airflow are changed, and a discontinuous silencer system is added, which further improves the silencer's noise reduction performance. It has good practicality and economy, and is more suitable for use in locomotive / small and medium-sized generator exhaust treatment systems. The deep drawing process achieves standardized interchangeability of the product and improves the production and application of the silencer. The multifunctional integrated design of the support part combines the functions of the outer shell and the partition, has good structural and sealing properties, and reduces the processing and use of parts. It has the advantages of providing economy and large-scale automated mass production, so that the silencer product can be fully automated, thereby greatly improving production efficiency and reducing production costs.

[0046] See Figure 10 、 11 As shown, the silencer of the present invention can be used on a locomotive, such as a lawn mower. The silencer 500 can be installed at the front or rear end of the locomotive and connected to the corresponding exhaust gas treatment system through the external duct 82 of the intake system, thereby introducing the exhaust gas of the locomotive into the silencer, and then being discharged after being silenced and noise-reduced by the silencer, thereby reducing noise pollution.

[0047] Although preferred specific embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention should not be limited to the structures and operations that are exactly the same as those described above and in the accompanying drawings. For those skilled in the art, many equivalent improvements and changes can be made to the above embodiments through logical analysis, reasoning or limited experiments without departing from the concept and scope of the present invention, but these improvements and changes should all fall within the scope of protection claimed by the present invention.

Claims

1. A method for manufacturing a muffler, characterized in that: The method is to construct a closed muffler chamber, which is formed by at least a first end cover and a second end cover being assembled and enclosed, and the muffler chamber obtains a first axial direction for guiding the extension of the muffler chamber according to the mutual assembly direction of the first end cover and the second end cover; at least one muffler pipe is arranged in the muffler chamber, and the muffler pipe is supported by a support system that guides the muffler pipe to exist in a corresponding stable state in the muffler chamber, and the support system separates the muffler chamber along the first axial direction to form an intake chamber and an injection buffer chamber, and the injection buffer chamber and the intake chamber are connected through a throttling system; the intake chamber is provided with an intake system for connecting to the corresponding external exhaust gas, and the intake system has the characteristic of guiding the exhaust gas to enter the intake chamber and rotate around the first axial direction; the muffler pipe is provided with at least a first radial air guide hole, and the first radial air guide hole is located in the injection buffer chamber, and the muffler pipe is extended along the first axial direction and guides the gas in the injection buffer chamber to flow into the muffler pipe through the first radial air guide hole and then be discharged; The support system includes a first support member and a second support member, which are arranged at intervals in the first axial direction and thereby separate the muffler chamber along the first axial direction to form an air inlet chamber and an injection buffer chamber, the injection buffer chamber is located between the first support member and the second support member, the first end cover and the second end cover are manufactured based on a deep drawing integral molding process, the first end cover and the second end cover are both U-shaped structures, and the opening ends of the first end cover and the second end cover are partially overlapped with each other; the deep drawing integral molding process adopts step-by-step stretching, the first stretching is a negative gap stretching, the upper and lower mold gaps are less than the thickness of the stretched part, the stretching ratio H / D ≥ 1.3, H is the height of the stretched part, D is the diameter or diagonal length of the stretched part, and after the first stretching, the surface temperature of the product is above 75 degrees Celsius; the second stretching forms the arc top feature and the guide positioning feature of the product; the third stretching enters the shaping process to form the inner and outer dimensions of the product, and obtains a tightly connected structure that ensures the air tightness of the sleeve; the time difference between the first stretching and the second stretching, and the time difference between the second stretching and the third stretching must satisfy that the surface temperature of the product is controlled above 65 degrees Celsius during the latter stretching; Mechanical automation is used for assembly and enclosure. The first end cover, the second end cover, the first support and the second support are assembled and connected by an assembly welding device, and a polishing brush oil drying device is used for surface treatment after assembly and welding. The assembly welding device provides a docking module, a transmission module and a welding module. The docking module includes left and right fixtures to achieve accurate alignment and assembly of interconnected parts and effectively eliminate stress effects. The transmission module connects the docking module and the welding module, and transmits the docked products on the docking module to the welding module. The welding module provides a welding gun, a pressure wheel and a rotary drive component. The welding position of the product is now pressed and welded, and the product is driven to rotate to achieve continuous circumferential welding; after welding is completed, the product is transferred to the polishing brush oil drying device for surface treatment; the polishing brush oil drying device provides a polishing module, an oil brushing module and a drying module in sequence, and is equipped with a corresponding transmission mechanism to achieve continuous operation; the polishing module uses product rotation and polishing wheel friction polishing to remove excess solder from the product welding position and improve the air tightness of the welding position, the oil brushing module uses product rotation to brush and protect the polished part, and the drying module wraps the product's oil brush position and heats it to remove moisture, so that the protective oil is tightly attached to the product surface.

2. A method for manufacturing a muffler, characterized in that: The method is to construct a closed muffler chamber, which is formed by at least a first end cover and a second end cover being assembled and enclosed, and the muffler chamber obtains a first axial direction for guiding the extension of the muffler chamber according to the mutual assembly direction of the first end cover and the second end cover; at least one muffler pipe is arranged in the muffler chamber, and the muffler pipe is supported by a support system that guides the muffler pipe to exist in a corresponding stable state in the muffler chamber, and the support system separates the muffler chamber along the first axial direction to form an intake chamber and an injection buffer chamber, and the injection buffer chamber and the intake chamber are connected through a throttling system; the intake chamber is provided with an intake system for connecting to the corresponding external exhaust gas, and the intake system has the characteristic of guiding the exhaust gas to enter the intake chamber and rotate around the first axial direction; the muffler pipe is provided with at least a first radial air guide hole, and the first radial air guide hole is located in the injection buffer chamber, and the muffler pipe is extended along the first axial direction and guides the gas in the injection buffer chamber to flow into the muffler pipe through the first radial air guide hole and then be discharged; The support system includes a first support member and a second support member, and the soundproof chamber is formed by sequentially assembling and enclosing a first end cover, a first support member and a second end cover. The first end cover, the first support member and the second end cover are manufactured based on a deep drawing one-piece molding process, so that the first end cover, the first support member and the second end cover are all U-shaped structures, and the first end cover, the first support member and the second end cover are partially overlapped with each other in sequence; the first support member and the second support member separate the soundproof chamber along the first axial direction to form an air intake chamber and an injection buffer chamber, and the injection buffer chamber is located between the first support member and the second support member. Step-by-step stretching is adopted in the deep drawing one-piece molding process, and the first stretching is a negative gap stretching. The gap between the upper and lower dies is less than the thickness of the stretched part plate, and the stretching ratio H / D ≥ 1.3 , H is the height of the stretched part, D is the diameter or diagonal length of the stretched part, and after the first stretch, the surface temperature of the product is above 75 degrees Celsius; the second stretch forms the arc top feature and the guide positioning feature of the product; the third stretch enters the shaping process to form the internal and external dimensions of the product, and obtain a tight connection structure that ensures the airtightness of the sleeve; the time difference between the first and second stretches, and the time difference between the second and third stretches, must both ensure that the surface temperature of the product is controlled above 65 degrees Celsius during the latter stretch; Mechanical automation is used for assembly and enclosure. The first end cover, the second end cover, the first support and the second support are assembled and connected by an assembly welding device, and a polishing brush oil drying device is used for surface treatment after assembly and welding. The assembly welding device provides a docking module, a transmission module and a welding module. The docking module includes left and right fixtures to achieve accurate alignment and assembly of interconnected parts and effectively eliminate stress effects. The transmission module connects the docking module and the welding module, and transmits the docked products on the docking module to the welding module. The welding module provides a welding gun, a pressure wheel and a rotary drive component. The welding position of the product is now pressed and welded, and the product is driven to rotate to achieve continuous circumferential welding; after welding is completed, the product is transferred to the polishing brush oil drying device for surface treatment; the polishing brush oil drying device provides a polishing module, an oil brushing module and a drying module in sequence, and is equipped with a corresponding transmission mechanism to achieve continuous operation; the polishing module uses product rotation and polishing wheel friction polishing to remove excess solder from the product welding position and improve the air tightness of the welding position, the oil brushing module uses product rotation to brush and protect the polished part, and the drying module wraps the product's oil brush position and heats it to remove moisture, so that the protective oil is tightly attached to the product surface.

3. A method for manufacturing a muffler, characterized in that: The method is to construct a closed muffler chamber, which is formed by at least a first end cover and a second end cover being assembled and enclosed, and the muffler chamber obtains a first axial direction for guiding the extension of the muffler chamber according to the mutual assembly direction of the first end cover and the second end cover; at least one muffler pipe is arranged in the muffler chamber, and the muffler pipe is supported by a support system that guides the muffler pipe to exist in a corresponding stable state in the muffler chamber, and the support system separates the muffler chamber along the first axial direction to form an intake chamber and an injection buffer chamber, and the injection buffer chamber and the intake chamber are connected through a throttling system; the intake chamber is provided with an intake system for connecting to the corresponding external exhaust gas, and the intake system has the characteristic of guiding the exhaust gas to enter the intake chamber and rotate around the first axial direction; the muffler pipe is provided with at least a first radial air guide hole, and the first radial air guide hole is located in the injection buffer chamber, and the muffler pipe is extended along the first axial direction and guides the gas in the injection buffer chamber to flow into the muffler pipe through the first radial air guide hole and then be discharged; The support system includes a first support member, a second support member and a third support member, the muffler chamber is formed by sequentially assembling and enclosing the first end cover, the first support member, the third support member and the second end cover, the third support member is embedded between the first support member and the second support member, the first support member and the second support member separate the muffler chamber along the first axial direction to form an air inlet chamber and a jet buffer chamber, the jet buffer chamber is located between the first support member and the second support member, the third support member further separates the jet buffer chamber into two connected sections, and the jet buffer between the third support member and the second support member The chamber adopts a venturi-principle-based air guide system to guide the gas in the injection buffer chamber into the silencer pipe; the first end cover, the first support member, the third support member and the second end cover are manufactured based on a deep drawing integrated molding process, and the first end cover, the first support member, the third support member and the second end cover are all U-shaped structures, and the first end cover, the first support member, the third support member and the second end cover are partially overlapped in sequence; the deep drawing integrated molding process adopts step-by-step stretching, the first stretching is a negative gap stretching, the upper and lower mold gaps are less than the thickness of the stretching piece, the stretching ratio H / D ≥ 1.3, H is the height of the stretching piece, D is the diameter of the stretching piece or the diagonal length, and after the first stretching, the surface temperature of the product is above 75 degrees Celsius; the second stretching forms the arc top feature and the guide positioning feature of the product; the third stretching enters the shaping process to form the inner and outer dimensions of the product, and obtains a tightly connected structure that ensures the air tightness of the sleeve; the time difference between the first stretching and the second stretching, and the time difference between the second stretching and the third stretching must satisfy that the surface temperature of the product is controlled above 65 degrees Celsius during the latter stretching; Mechanical automation is used for assembly and enclosure. The first end cover, the second end cover, the first support, the second support and the third support are assembled and connected through an assembly welding device, and a polishing brush oil drying device is used for surface treatment after assembly and welding. The assembly welding device provides a docking module, a transmission module and a welding module. The docking module includes left and right fixtures to achieve accurate alignment and assembly of interconnected parts and effectively eliminate stress effects. The transmission module realizes the connection between the docking module and the welding module, and transmits the docked products on the docking module to the welding module. The welding module provides a welding gun, a pressure wheel and a rotary drive assembly. The components are used to press and weld the welding positions of the products, and to drive the products to rotate to achieve continuous circumferential welding. After welding, the products are transferred to the polishing, oil brushing and drying device for surface treatment. The polishing, oil brushing and drying device sequentially provides a polishing module, an oil brushing module and a drying module, and is equipped with a corresponding transmission mechanism to achieve continuous operation. The polishing module uses product rotation and a polishing wheel for friction polishing to remove excess solder from the product welding position and improve the air tightness of the welding position. The oil brushing module uses a product rotation brushing method to brush oil on the polished parts for protection. The drying module wraps the product's oil brushing position and heats it to remove moisture, so that the protective oil is tightly attached to the product surface.

4. A muffler manufactured by the manufacturing method of claim 1, characterized in that: have: A first end cap, which is a U-shaped structure formed by a deep drawing integral molding process; A second end cap, which is a U-shaped structure formed by a deep drawing integral molding process; A closed soundproofing chamber, the soundproofing chamber is formed by at least a first end cover and a second end cover being assembled and enclosed, and the soundproofing chamber obtains a first axial direction that guides the extension of the soundproofing chamber according to the mutual assembly direction of the first end cover and the second end cover; at least one soundproofing pipe is arranged in the soundproofing chamber, and the soundproofing pipe is supported by a support system that guides the soundproofing pipe to exist in a corresponding stable state in the soundproofing chamber, and the support system includes at least a first support member and a second support member, and the first support member and the second support member are arranged at intervals in the first axial direction and thereby separate the soundproofing chamber along the first axial direction to form an air intake chamber and an injection buffer chamber, and the injection buffer chamber is located between the first support member and the second support member, and the air intake chamber is arranged at both ends of the injection buffer chamber along the first axial direction, and the injection buffer chamber The throttling system is connected to the air intake chamber, and the throttling system is arranged on the first support member and the second support member; the air intake chamber is provided with an air intake system for connecting to the corresponding external exhaust gas, and the air intake system has the characteristics of guiding the exhaust gas into the air intake chamber and rotating around the first axial direction, and the air intake system includes an air inlet and an external conduit, and the air inlet is provided on the outer circumference of the first end cover and the second end cover; the muffler is provided with a first radial air guide hole, and the first radial air guide hole is located in the injection buffer chamber. The muffler extends along the first axial direction and guides the gas in the injection buffer chamber to flow into the muffler through the first radial air guide hole and then be discharged, and the discharge direction is parallel to the first axial direction or forms an angle with the first axial direction; The open ends of the first end cover and the second end cover are partially overlapped and sleeved with each other, and the open end of the first end cover is provided with a first sleeve lip, which sleeves the open end of the second end cover and overlaps and surrounds the outer periphery of the second end cover; the end of the second end cover away from the first end cover is provided with a pipe outlet hole, and the pipe outlet hole is used for one end of the silencer to extend to discharge gas, while the other end of the silencer is sealed by a shrinkage tail; the first support member and the second support member are disc-shaped or U-shaped, the first support member is located in the first end cover, and the second support member is located in the second end cover, and the outer diameters of the first support member and the second support member respectively match the inner diameters of the first end cover and the second end cover, so that the first support member is tightly embedded in the first end cover, and the second support member is tightly embedded in the second end cover; the throttling system is a first throttling hole arranged on the first support member and a second throttling hole on the second support, and the first throttling hole and the second throttling hole are distributed around the first axial direction.

5. A muffler manufactured by the manufacturing method of claim 2, characterized in that: have: A first end cap, which is a U-shaped structure formed by a deep drawing integral molding process; A second end cap, which is a U-shaped structure formed by a deep drawing integral molding process; A closed soundproofing chamber, the soundproofing chamber is formed by at least a first end cover and a second end cover being assembled and enclosed, and the soundproofing chamber obtains a first axial direction that guides the extension of the soundproofing chamber according to the mutual assembly direction of the first end cover and the second end cover; at least one soundproofing pipe is arranged in the soundproofing chamber, and the soundproofing pipe is supported by a support system that guides the soundproofing pipe to exist in a corresponding stable state in the soundproofing chamber, and the support system includes at least a first support member and a second support member, and the first support member and the second support member are arranged at intervals in the first axial direction and thereby separate the soundproofing chamber along the first axial direction to form an air intake chamber and an injection buffer chamber, and the injection buffer chamber is located between the first support member and the second support member, and the air intake chamber is arranged at both ends of the injection buffer chamber along the first axial direction, and the injection buffer chamber The throttling system is connected to the air intake chamber, and the throttling system is arranged on the first support member and the second support member; the air intake chamber is provided with an air intake system for connecting to the corresponding external exhaust gas, and the air intake system has the characteristics of guiding the exhaust gas into the air intake chamber and rotating around the first axial direction, and the air intake system includes an air inlet and an external conduit, and the air inlet is provided on the outer circumference of the first end cover and the second end cover; the muffler is provided with a first radial air guide hole, and the first radial air guide hole is located in the injection buffer chamber. The muffler extends along the first axial direction and guides the gas in the injection buffer chamber to flow into the muffler through the first radial air guide hole and then be discharged, and the discharge direction is parallel to the first axial direction or forms an angle with the first axial direction; The first support member is a U-shaped structure formed based on a deep drawing integral molding process; the second support member is embedded in the open end of the first support member; the second support member is disc-shaped or U-shaped, and the outer diameter of the second support member matches the inner diameter of the first support member, so that the second support member and the first support member are tightly embedded; the first end cover, the first support member and the second end cover are partially overlapped with each other in sequence, and the open end of the first end cover is provided with a first sleeve lip, which sleeves the inner bottom end of the first support member and overlaps and surrounds the outer periphery of the first support member; the open end of the second end cover is provided with a second sleeve lip, which sleeves the open end of the first support member The mouth end overlaps and surrounds the outer circumference of the first support member, so that the first end cover, the first support member and the second end cover together form a silencer chamber, the second support member and the inner bottom of the first support member are spaced apart in the first axial direction, and the silencer chamber is thereby separated along the first axial direction to form an air inlet chamber and an injection buffer chamber, the throttling system is a first throttling hole arranged on the inner bottom of the first support member and a second throttling hole on the second support member, and the first throttling hole and the second throttling hole are distributed around the first axial direction; an end of the second end cover away from the first end cover is provided with an outlet hole, and the outlet hole is for one end of the silencer pipe to extend out to discharge gas, while the other end of the silencer pipe is sealed with a shrinkage tail.

6. A muffler manufactured by the manufacturing method of claim 3, characterized in that: have: A first end cap, which is a U-shaped structure formed by a deep drawing integral molding process; A second end cap, which is a U-shaped structure formed by a deep drawing integral molding process; A closed soundproofing chamber, the soundproofing chamber is formed by at least a first end cover and a second end cover being assembled and enclosed, and the soundproofing chamber obtains a first axial direction that guides the extension of the soundproofing chamber according to the mutual assembly direction of the first end cover and the second end cover; at least one soundproofing pipe is arranged in the soundproofing chamber, and the soundproofing pipe is supported by a support system that guides the soundproofing pipe to exist in a corresponding stable state in the soundproofing chamber, and the support system includes at least a first support member and a second support member, and the first support member and the second support member are arranged at intervals in the first axial direction and thereby separate the soundproofing chamber along the first axial direction to form an air intake chamber and an injection buffer chamber, and the injection buffer chamber is located between the first support member and the second support member, and the air intake chamber is arranged at both ends of the injection buffer chamber along the first axial direction, and the injection buffer chamber The throttling system is connected to the air intake chamber, and the throttling system is arranged on the first support member and the second support member; the air intake chamber is provided with an air intake system for connecting to the corresponding external exhaust gas, and the air intake system has the characteristics of guiding the exhaust gas into the air intake chamber and rotating around the first axial direction, and the air intake system includes an air inlet and an external conduit, and the air inlet is provided on the outer circumference of the first end cover and the second end cover; the muffler is provided with a first radial air guide hole, and the first radial air guide hole is located in the injection buffer chamber. The muffler extends along the first axial direction and guides the gas in the injection buffer chamber to flow into the muffler through the first radial air guide hole and then be discharged, and the discharge direction is parallel to the first axial direction or forms an angle with the first axial direction; The support system also includes a third support member, which is arranged between the first support member and the second support member, and the first support member and the third support member are both U-shaped structures formed based on a deep drawing one-piece molding process; the second support member is embedded in the open end of the third support member; the second support member is disc-shaped or U-shaped, and the outer diameter of the second support member matches the inner diameter of the third support member, so that the second support member and the third support member are tightly embedded; the first end cover, the first support member, the third support member and the second end cover are partially overlapped with each other in sequence, and the open end of the first end cover is provided with a first sleeve lip, which sleeves the inner bottom end of the first support member and overlaps and surrounds the outer periphery of the first support member; the open end of the first support member is sleeved with the inner bottom end of the third support member; the open end of the second end cover is provided with a second sleeve lip, which sleeves the open end of the third support member and overlaps and surrounds the outer periphery of the third support member, so that the first end cover, the first support member, the third support member and the second end cover together form a soundproof chamber, which is formed according to the first end cover, the first support member, the third support member and a second end cover are connected in a mutual assembly direction to obtain a first axial direction for guiding the extension of the silencer chamber; the silencer pipe is supported in the silencer chamber by a first support member, a second support member and a third support member, the second support member and the inner bottom of the first support member are spaced apart in the first axial direction and thereby separate the silencer chamber along the first axial direction to form an air inlet chamber and an injection buffer chamber, the injection buffer chamber is located in the first support member and the second support member, the inner bottom of the third support member further divides the injection buffer chamber into two connected sections, and an air guide system based on the Venturi principle is used in the injection buffer chamber between the third support member and the second support member to guide the gas in the injection buffer chamber into the silencer pipe; the throttling system is a first throttling hole arranged on the inner bottom of the first support member, a second throttling hole of the second support member and a third throttling hole on the inner bottom of the third support member, and the first throttling hole, the second throttling hole and the third throttling hole are all distributed around the first axial direction; an outlet hole is provided at the end of the second end cover away from the first end cover, and the outlet hole is used for one end of the silencer pipe to extend to discharge gas, while the other end of the silencer pipe is sealed with a shrinkage tail; The air guide system based on the Venturi principle has a sleeve protruding from the inner bottom of the third support member toward the second support member, and a gap is left between the outer protruding end of the sleeve and the second support member. The sleeve is connected to the silencer pipe, and a gap is left between the inner wall of the sleeve and the outer wall of the silencer pipe. The silencer pipe is also provided with a second radial air guide hole, and the second radial air guide hole is located inside the sleeve.

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