CN113909817B - Processing technology of low-smoke muffler assembly - Google Patents
Processing technology of low-smoke muffler assembly Download PDFInfo
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- CN113909817B CN113909817B CN202111214225.3A CN202111214225A CN113909817B CN 113909817 B CN113909817 B CN 113909817B CN 202111214225 A CN202111214225 A CN 202111214225A CN 113909817 B CN113909817 B CN 113909817B
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- 239000000779 smoke Substances 0.000 title claims abstract description 20
- 238000012545 processing Methods 0.000 title claims abstract description 10
- 238000005516 engineering process Methods 0.000 title claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 83
- 238000003466 welding Methods 0.000 claims abstract description 61
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 230000030279 gene silencing Effects 0.000 claims abstract description 18
- 238000002791 soaking Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 238000004080 punching Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 16
- 230000003584 silencer Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000004049 embossing Methods 0.000 claims description 3
- 238000002161 passivation Methods 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/007—Apparatus used as intake or exhaust silencer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/0211—Arrangements for mounting filtering elements in housing, e.g. with means for compensating thermal expansion or vibration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a processing technology of a low-smoke muffler component, which comprises the following steps: rolling the plate into a cylindrical shape, connecting the cylindrical body with a central seam to prepare a shell cylinder, cutting the plate into circular plates with specified sizes, punching the circular plates to prepare a silencing plate, and preparing an exhaust connecting pipe; placing a sealing rubber ring matched with the diameter of the filter element into a soaking barrel, adding water with the temperature of 80-90 ℃ into the soaking barrel, and soaking for 20-40min to enable the sealing rubber ring to be heated and expanded; sleeving the soaked sealing rubber ring on the filter element, standing and cooling for 30-60min to enable the sealing rubber ring to be cooled and contracted, and enabling the inner ring of the sealing rubber ring to form interference fit with the filter element; press-fitting a filter element, a silencing plate and a sealing cover; and (3) sequentially press-fitting the silencing plates and the sealing covers in the S2 and the S3 into the shell barrel through a press-fitting machine, and welding the sealing covers. The invention simultaneously meets the requirements of connection strength and tightness of the filter element assembled in the muffler, and the equipment required by the process is simple and cheap, is convenient to operate and is suitable for mass production.
Description
Technical Field
The invention relates to the technical field of automobile part machining, in particular to a machining process of a low-smoke muffler component.
Background
The vehicle noise is mainly from the vehicle exhaust noise. If no muffler is added, the noise can reach more than 100 dB at a certain speed. And the engine noise and the tire noise are respectively the engine noise and the tire noise, wherein the engine noise can reach more than 90 dB when the automobile normally runs, and the tire noise can reach about 95 dB when the automobile speed is more than 90 km/h. Therefore, by adding the muffler in the exhaust system, the exhaust noise of the automobile can be reduced by 20-30 dB. The automobile muffler is a common component part of an automobile, is beneficial to reducing noise pollution in the running process of the automobile, and is manufactured by utilizing the sound wave superposition interference principle. The material selection, structural design and production process and process control of the muffler have important effects on quality assurance, cost control, service life and the like.
The common automobile muffler cannot filter the smoke discharged by the engine, and a filter element is often assembled in the muffler when the muffler is produced so as to achieve the purpose of filtering the smoke; however, most of the prior filter elements are net bodies, which are inconvenient to weld during assembly, and are easy to be subjected to cold welding and off-welding, and meanwhile, tightness between the filter elements and the muffler pipe is difficult to be ensured, so that smoke is easy to pass through gaps between the filter elements and the muffler pipe, and a good filtering effect cannot be achieved, so that the assembly difficulty of the filter elements in the muffler is high, no good manufacturing process exists at present, and therefore, a processing process of a low-smoke muffler component is required.
Disclosure of Invention
The invention aims to provide a processing technology of a low-smoke muffler component, which simultaneously meets the requirements of connection strength and tightness of an assembled filter element in a muffler, has simple and cheap equipment required by the technology, is convenient to operate, and is suitable for large-scale production so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the processing technology of the low-smoke muffler component comprises the following steps:
s1, preparing a shell cylinder; cutting the leveling plate to a specified size, rolling the plate into a cylindrical shape, and connecting a central seam of a cylinder body to prepare a shell cylinder body;
s2, preparing a sound attenuation plate; cutting a flat plate material into circular plates with specified sizes, and punching the circular plates to obtain a silencer plate;
s3, preparing an exhaust connecting pipe; cutting a pipe with a specified diameter into a pipe section to manufacture an exhaust connecting pipe, cutting a flat plate material into round pieces matched with the diameter of the shell cylinder, perforating the round pieces, inserting the pipe section into the holes, and welding the pipe section into a whole, so that the round pieces are positioned at one end of the exhaust connecting pipe to form a sealing cover of the shell cylinder;
s4, preparing a filter element in a sealing way; taking a filter element with a specified diameter for standby; placing a sealing rubber ring matched with the diameter of the filter element into a soaking barrel, adding water with the temperature of 80-90 ℃ into the soaking barrel, and soaking for 20-40min to enable the sealing rubber ring to be heated and expanded;
s5, sleeving a sealing rubber ring; sleeving the soaked sealing rubber ring on the filter element, standing and cooling for 30-60min to enable the sealing rubber ring to be cooled and contracted, and enabling the inner ring of the sealing rubber ring to form interference fit with the filter element;
s6, press fitting the filter element; the filter element and the sealing rubber ring are pressed into the middle part of the shell cylinder body through a press-fitting machine, so that the outer ring of the sealing rubber ring and the inner ring of the shell cylinder body form interference fit;
s7, press fitting the silencing plate and the sealing cover; sequentially press-fitting the silencing plates and the sealing covers in the S2 and the S3 into the shell cylinder body through a press-fitting machine, and press-fitting and crimping two ends of the press-fitted shell cylinder body through a press-fitting machine to fasten the sealing covers;
s8, welding a sealing cover; derusting the shell cylinder, the sealing cover and the joint thereof, cleaning, drying, fixing by using a clamp, performing connection welding at the sealing cover according to the circumference, ensuring that the height and the width of a welding spot cannot exceed the size of a welding spot at the later time, polishing the welding spot after the welding is finished, and performing pickling passivation and spraying treatment on the surface of the welding spot;
s9, testing a muffler finished product; and placing the formed silencer into a tool, performing pressure test, and then performing vibration test.
Preferably, in S1, the rolled plate is cut by a plate shearing machine, a rounding machine is used for rolling the cut plate into a barrel shape, then a central seam is welded into a barrel, or a tapping machine is used for bending the central seam in the forward and reverse directions on two sides, and then a hydraulic embossing machine is used for overlapping to form patterns.
Preferably, in S3, the pipe is a pipe with a wall thickness of 1.3mm and an outer diameter of 8cm, the flat plate is a stainless steel plate with a thickness of 1.5mm, the pipe is cut into a pipe section with a length of 30cm by adopting a pipe cutting machine, two circular sheets matched with the diameter of a cylinder are processed by adopting a cutting machine, and edges of the two circular sheets are polished by utilizing an edge polishing machine.
Preferably, a heater is arranged in the soaking barrel in S4 to heat water, and a temperature controller is arranged to control the heater, so that the water temperature is always kept at 80-90 degrees; and S5, adopting an industrial fan to blow and accelerate cooling of the filter element.
Preferably, the inner diameter of the sealing rubber ring is 0.2mm smaller than the outer diameter of the filter element, and the outer diameter of the sealing rubber ring is 0.1mm larger than the inner diameter of the shell cylinder.
Preferably, in the press mounting process of S6 and S7, the cylinder is clamped on a fixed clamping seat on an automatic press mounting workbench, the filter element, the silencing plate and the sealing cover are placed on a guide rod matched with the filter element, the silencing plate and the sealing cover above the filter element, and then the filter element, the silencing plate and the sealing cover are driven by an oil cylinder to be pressed into the shell cylinder to realize press fit.
Preferably, in S8, flat fillet welding is adopted for welding, and SF-409Ti is adopted as a welding wire; the welding is carried out by adopting flat fillet welding, welding current of 50-230A, welding voltage of 20-25V, welding wire diameter of 0.8-1.6mm, and welding angle of 90 degrees relative to the end face of the steel pipe at the gas flow rate of 10-15L per minute and the welding speed of 200-230mm per minute.
Preferably, in S9, the pressure test is to make the formed muffler last for 10 minutes under the pressure of 180KPa, and detect that no air leakage occurs at the welded position; the vibration test is to make the formed silencer have a vibration frequency of 100 Hz-180 Hz and a vibration acceleration of 50m/s 2 The vibration time was 3 hours, and the stability of the muffler was detected.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the sealing rubber ring is soaked in hot water, so that the sealing rubber ring is heated and expanded, the soaked sealing rubber ring is conveniently sleeved on the filter element, and then the sealing rubber ring is cooled and contracted through standing and cooling, so that the purpose that the sealing rubber ring inner ring and the filter element form interference fit is achieved, the whole flow is simple, the implementation equipment is simple, the assembly connection strength is high, the sealing performance is good, and the device is suitable for actual production.
Drawings
FIG. 1 is a process flow diagram of the present invention;
fig. 2 is a schematic view of a muffler processed according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: the processing technology of the low-smoke muffler component comprises the following steps:
s1, preparing a shell cylinder; cutting the leveling plate to a specified size, rolling the plate into a cylindrical shape, and connecting a central seam of a cylinder body to prepare a shell cylinder body; firstly, cutting a coiled plate by a plate shearing machine, coiling the coiled plate into a barrel shape by a rounding machine with proper size, welding a center seam into a barrel, bending the center seam with both sides positively and negatively by a tapping machine, and overlapping to form patterns by a hydraulic embossing machine;
s2, preparing a sound attenuation plate; cutting a flat plate material into circular plates with specified sizes, and punching the circular plates to obtain a silencer plate;
s3, preparing an exhaust connecting pipe; cutting a pipe with a specified diameter into a pipe section to manufacture an exhaust connecting pipe, cutting a flat plate material into round pieces matched with the diameter of the shell cylinder, perforating the round pieces, inserting the pipe section into the holes, and welding the pipe section into a whole, so that the round pieces are positioned at one end of the exhaust connecting pipe to form a sealing cover of the shell cylinder; the pipe is a pipe with the wall thickness of 1.3mm and the outer diameter of 8cm, the flat plate is a stainless steel plate with the thickness of 1.5mm, the pipe is cut into a pipe section with the length of 30cm by adopting a pipe cutting machine, two circular sheets matched with the diameter of a cylinder are processed by adopting a cutting machine, and the edges of the two circular sheets are polished by utilizing an edge grinder.
S4, preparing a filter element in a sealing way; taking a filter element with a specified diameter for standby; placing a sealing rubber ring matched with the diameter of the filter element into a soaking barrel, adding water with the temperature of 80-90 ℃ into the soaking barrel, and soaking for 20-40min to enable the sealing rubber ring to be heated and expanded; a heater is arranged in the soaking barrel to heat water, and a temperature controller is arranged to control the heater, so that the water temperature is always kept at 80-90 degrees;
s5, sleeving a sealing rubber ring; sleeving the soaked sealing rubber ring on the filter element, standing and cooling for 30-60min to enable the sealing rubber ring to be cooled and contracted, and enabling the inner ring of the sealing rubber ring to form interference fit with the filter element; adopting an industrial fan to blow and accelerate cooling of the filter element; the inner diameter of the sealing rubber ring is 0.2mm smaller than the outer diameter of the filter element, and the outer diameter of the sealing rubber ring is 0.1mm larger than the inner diameter of the shell cylinder;
s6, press fitting the filter element; the filter element and the sealing rubber ring are pressed into the middle part of the shell cylinder body through a press-fitting machine, so that the outer ring of the sealing rubber ring and the inner ring of the shell cylinder body form interference fit; firstly, clamping a cylinder body on a fixed clamping seat on a workbench of an automatic press-fitting machine, placing a filter element on a guide rod matched with the filter element above the filter element, and then driving the filter element to press into a shell cylinder body through an oil cylinder to realize press-fitting;
according to the invention, the sealing rubber ring is soaked in hot water, so that the sealing rubber ring is heated and expanded, the soaked sealing rubber ring is conveniently sleeved on the filter element, and then the sealing rubber ring is cooled and contracted through standing and cooling, so that the purpose that the sealing rubber ring inner ring and the filter element form interference fit is achieved, the whole flow is simple, the implementation equipment is simple, the assembly connection strength is high, the sealing performance is good, and the device is suitable for actual production.
S7, press fitting the silencing plate and the sealing cover; sequentially press-fitting the silencing plates and the sealing covers in the S2 and the S3 into the shell cylinder body through a press-fitting machine, and press-fitting and crimping two ends of the press-fitted shell cylinder body through a press-fitting machine to fasten the sealing covers; firstly, the cylinder body is clamped on a fixed clamping seat on a workbench of an automatic press-loading machine, the silencing plate and the sealing cover core are placed on a guide rod matched with the silencing plate and the sealing cover core above the silencing plate and the sealing cover core, and then the cylinder is driven to press into the shell cylinder body through an oil cylinder to realize press-fit.
S8, welding a sealing cover; derusting the shell cylinder, the sealing cover and the joint thereof, cleaning, drying, fixing by using a clamp, performing connection welding at the sealing cover according to the circumference, ensuring that the height and the width of a welding spot cannot exceed the size of a welding spot at the later time, polishing the welding spot after the welding is finished, and performing pickling passivation and spraying treatment on the surface of the welding spot; welding is carried out by adopting flat fillet welding, and SF-409Ti is adopted as a welding wire; adopting flat fillet welding, welding current of 50-230A, welding voltage of 20-25V, welding wire diameter of 0.8-1.6mm, and welding at gas flow of 10-15L per minute and welding speed of 200-230mm per minute relative to the welding angle of 90 degrees of the end face of the steel pipe;
s9, testing a muffler finished product; placing the formed muffler into a tool, performing pressure test, and then performing vibration test; the pressure test is to keep the formed silencer under the pressure of 180KPa for 10min, and the welding position is detected to be free from air leakage; the vibration test is to make the formed silencer have a vibration frequency of 100 Hz-180 Hz and a vibration acceleration of 50m/s 2 The vibration time was 3 hours, and the stability of the muffler was detected.
After cleaning, sampling detection is carried out on the automobile stainless steel muffler, and the welding seam tolerance test is included.
According to the processing technological process, in one embodiment of the invention, the manufactured muffler is shown in fig. 2, can be used for purifying black smoke discharged by an engine, can be used for purifying a gasoline vehicle, has small ventilation resistance, has a simple structure, and integrates purification and noise elimination.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The processing technology of the low-smoke muffler component is characterized in that: the method comprises the following steps:
s1, preparing a shell cylinder; cutting the leveling plate to a specified size, rolling the plate into a cylindrical shape, and connecting a central seam of a cylinder body to prepare a shell cylinder body;
s2, preparing a sound attenuation plate; cutting a flat plate material into circular plates with specified sizes, and punching the circular plates to obtain a silencer plate;
s3, preparing an exhaust connecting pipe; cutting a pipe with a specified diameter into a pipe section to manufacture an exhaust connecting pipe, cutting a flat plate material into round pieces matched with the diameter of the shell cylinder, perforating the round pieces, inserting the pipe section into the holes, and welding the pipe section into a whole, so that the round pieces are positioned at one end of the exhaust connecting pipe to form a sealing cover of the shell cylinder;
s4, preparing a filter element in a sealing way; taking a filter element with a specified diameter for standby; placing a sealing rubber ring matched with the diameter of the filter element into a soaking barrel, adding water with the temperature of 80-90 ℃ into the soaking barrel, and soaking for 20-40min to enable the sealing rubber ring to be heated and expanded;
s5, sleeving a sealing rubber ring; sleeving the soaked sealing rubber ring on the filter element, standing and cooling for 30-60min to enable the sealing rubber ring to be cooled and contracted, and enabling the inner ring of the sealing rubber ring to form interference fit with the filter element;
s6, press fitting the filter element; the filter element and the sealing rubber ring are pressed into the middle part of the shell cylinder body through a press-fitting machine, so that the outer ring of the sealing rubber ring and the inner ring of the shell cylinder body form interference fit;
s7, press fitting the silencing plate and the sealing cover; sequentially press-fitting the silencing plates and the sealing covers in the S2 and the S3 into the shell cylinder body through a press-fitting machine, and press-fitting and crimping two ends of the press-fitted shell cylinder body through a press-fitting machine to fasten the sealing covers;
s8, welding a sealing cover; derusting the shell cylinder, the sealing cover and the joint thereof, cleaning, drying, fixing by using a clamp, performing connection welding at the sealing cover according to the circumference, ensuring that the height and the width of a welding spot cannot exceed the size of a welding spot at the later time, polishing the welding spot after the welding is finished, and performing pickling passivation and spraying treatment on the surface of the welding spot;
s9, testing a muffler finished product; and placing the formed silencer into a tool, performing pressure test, and then performing vibration test.
2. The process for manufacturing a low smoke muffler assembly as defined in claim 1, wherein: in S1, firstly, a rolled plate is cut by a plate shearing machine, a rounding machine is used for rolling the rolled plate into a barrel shape after the plate is cut into a proper size, then a central seam is welded into a barrel, or a tapping machine is used for bending the central seam in the forward and reverse directions in combination with two sides, and then a hydraulic embossing machine is used for lap joint to form patterns.
3. The process for manufacturing a low smoke muffler assembly as defined in claim 1, wherein: in S3, the pipe is a pipe with the wall thickness of 1.3mm and the outer diameter of 8cm, the flat plate is a stainless steel plate with the thickness of 1.5mm, the pipe is cut into a pipe section with the length of 30cm by adopting a pipe cutting machine, two circular sheets matched with the diameter of a cylinder are processed by adopting a cutting machine, and the edges of the two circular sheets are polished by utilizing an edge polishing machine.
4. The process for manufacturing a low smoke muffler assembly as defined in claim 1, wherein: s4, a heater is arranged in the soaking barrel to heat water, and a temperature controller is arranged to control the heater, so that the water temperature is always kept at 80-90 degrees; and S5, adopting an industrial fan to blow and accelerate cooling of the filter element.
5. The process for manufacturing a low smoke muffler assembly as defined in claim 1, wherein: the inner diameter of the sealing rubber ring is 0.2mm smaller than the outer diameter of the filter element, and the outer diameter of the sealing rubber ring is 0.1mm larger than the inner diameter of the shell cylinder.
6. The process for manufacturing a low smoke muffler assembly as defined in claim 1, wherein: in the press mounting process of S6 and S7, firstly, the cylinder body is clamped on a fixed clamping seat on an automatic press mounting workbench, the filter element, the silencing plate and the sealing cover are placed on a guide rod matched with the filter element, the silencing plate and the sealing cover above the filter element, and then the filter element, the silencing plate and the sealing cover are driven by an oil cylinder to be pressed into the shell cylinder body to realize press fit.
7. The process for manufacturing a low smoke muffler assembly as defined in claim 1, wherein: s8, welding is carried out by adopting flat fillet welding, and SF-409Ti is adopted as a welding wire; the welding is carried out by adopting flat fillet welding, welding current of 50-230A, welding voltage of 20-25V, welding wire diameter of 0.8-1.6mm, and welding angle of 90 degrees relative to the end face of the steel pipe at the gas flow rate of 10-15L per minute and the welding speed of 200-230mm per minute.
8. According to claim 1The processing technology of the low-smoke muffler component is characterized in that: s9, the pressure test is to keep the formed silencer under the pressure of 180KPa for 10min, and the welding position is detected to be free from air leakage; the vibration test is to make the formed silencer have a vibration frequency of 100 Hz-180 Hz and a vibration acceleration of 50m/s 2 The vibration time was 3 hours, and the stability of the muffler was detected.
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