CN111169105B - Heat-insulating and noise-reducing structural part and manufacturing method thereof - Google Patents
Heat-insulating and noise-reducing structural part and manufacturing method thereof Download PDFInfo
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- CN111169105B CN111169105B CN201911307843.5A CN201911307843A CN111169105B CN 111169105 B CN111169105 B CN 111169105B CN 201911307843 A CN201911307843 A CN 201911307843A CN 111169105 B CN111169105 B CN 111169105B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0014—Brazing of honeycomb sandwich structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/011—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of iron alloys or steels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
Abstract
The invention relates to a heat-insulating and noise-reducing structural part and a manufacturing method thereof. The filling material mainly comprises a metal material and a ceramic material and is preset in a filling mode; the noise reduction framework structure mainly adopts a honeycomb form, metal skins are brazed through a honeycomb structure made of metal, fillers preset in a honeycomb core are sealed in the honeycomb core, meanwhile, the fillers are pre-coated with brazing filler metal to realize integration with the honeycomb lattice core, and machining flow disturbing holes are formed in the skins on one side close to a sound source. In the aspect of design of a heat insulation and noise reduction structure, the invention integrates the performance advantages of the honeycomb and the ceramic in the aspect of heat insulation and the noise reduction and attenuation effects of the slotted holes on sound waves, realizes the centralized embodiment of the functions in the structure by a brazing integrated process, and can meet the use requirements of the industrial field on the combination of heat insulation and noise reduction.
Description
Technical Field
The invention belongs to the technical field of welding forming of functional structures, and particularly relates to a structural member with dual functions of heat insulation and noise reduction and a manufacturing method thereof.
Background
At present, along with the continuous upgrading of the complexity of industrial products, the trend of multi-functionalization is gradually prominent. In the field of systems such as high-performance engines, gas turbines, blowers, wind tunnels and the like, multiple functions of heat insulation, noise reduction and the like of a working environment are realized through engineering components, and the technical problems to be solved in the industry are urgently needed.
In the aspect of heat insulation, the heat insulation is realized by changing heat conduction materials of heat conduction environment in the forms of materials such as a heat protection coating, a metal honeycomb, foam metal, a heat insulation felt, heat-resistant foam and the like of a ceramic substrate at present; in the aspect of noise reduction, a metal structure comprising a honeycomb, a silencing hole and a channel is mainly adopted in the industry, and the hollow structures such as the honeycomb, the micropore and the airflow groove are utilized to realize choked flow attenuation and noise reduction of sound waves. For example, chinese patent ZL201710135850.6 discloses a 'regular hexagonal honeycomb core with a detachable circular noise reduction structure'. However, a structure having both heat insulation and noise reduction functions has not been provided so far with representative technology and product application.
The brazing technology can realize the integrated molding of dissimilar materials such as ceramics, metals and the like through the interface reaction of the active brazing filler metal. The invention provides a heat insulation and noise reduction structure and a brazing integrated manufacturing method thereof based on technical requirements of the industrial field on heat insulation and noise reduction performance and process adaptability of a brazing technology in integrated connection of dissimilar materials.
Disclosure of Invention
The invention aims to provide a heat-insulation noise-reduction structural member, which breaks through the limitation of insufficient performance of the existing structure in the aspects of heat insulation and noise reduction and improves the comprehensive performance of a functional structure.
The invention also aims to provide a manufacturing method of the composite integrated heat insulation and noise reduction structure, which realizes the integrated integration of different materials in the heat insulation and noise reduction structure by a method of presetting brazing filler metals at multiple positions and synchronously welding.
The purpose of the invention is realized by the following technical scheme:
a thermal insulation and noise reduction structure comprises a noise reduction framework, a metal skin 1 and a filling material for thermal insulation, wherein the noise reduction framework is of a metal honeycomb structure, the metal skin 1 is fixed at two open ends of the honeycomb structure, the filling material is arranged in the inner space of the honeycomb structure, and the filling material is selected from a metal material and a ceramic material;
the noise reduction framework, the metal skin 1 and the filling material for heat insulation are integrated through brazing.
The filling material comprises the following components in percentage by volume: 0-100% of ceramic material, and the balance of metal material, wherein the metal material is selected from one or more of stainless steel wires, high-temperature alloy wires or foam metal, and the ceramic material is selected from one or more of ceramic fiber cloth, honeycomb ceramics and compact structure ceramics.
The filling material comprises the following components: 20-80% of ceramic material and the balance of metal material.
The noise reduction framework of the structural member is a honeycomb core 5 and a metal skin 1, turbulent flow holes 3 are formed in the skin, and the skins at two opening ends of the honeycomb core are integrated with the honeycomb core 5 through brazing.
The turbulent flow holes 3 of the structural part are arranged on the metal skin 1 close to the sound source side.
The aperture of the turbulent flow hole 3 on the metal skin 1 is 0.1-20 mm.
In the filling material of the noise reduction structure, the ceramic filling material with high melting point is arranged in the honeycomb core near a heat source, and the metal wire filler is arranged at a far heat source.
A method for manufacturing a structure with thermal insulation and noise reduction as described above, comprising the steps of:
a. pretreatment of filling materials: selecting an applicable brazing filler metal according to the use temperature requirement of the structural part, and pre-coating brazing filler metal paste or brazing filler metal powder on the surfaces of the selected metal wires and the ceramic filling material;
b. filling a honeycomb core: according to the distance from the heat source, ceramic filling materials with high melting points are placed in the honeycomb core 5 close to the heat source, and metal wire fillers are placed in the position far from the heat source;
c. skin combination: according to the distance from a sound source to the sound source, arranging the metal skin 1 with the turbulent flow holes on the near sound source side, and arranging the metal skin 1 without the turbulent flow holes on the far sound source side;
d. brazing integration: and selecting brazing filler metal to carry out integral brazing filler metal on the metal skin 1 and the honeycomb core 5 according to the requirement of working condition temperature.
In the step a, the brazing filler metal coated on the filler is selected from aluminum-based brazing filler metal, nickel-based brazing filler metal, titanium-based brazing filler metal or cobalt-based brazing filler metal, and the brazing filler metal is used in the form of paste, adhesive tape or powder mixed with a binder.
In the step d, the brazing filler metal adopted for the structure integration is selected from tin-based brazing filler metal, aluminum-based brazing filler metal, titanium-based brazing filler metal, nickel-based brazing filler metal and cobalt-based brazing filler metal; the brazing method includes vacuum brazing, gas-shielded brazing, and the like.
The invention has the beneficial effects that:
in the aspect of design of a heat insulation and noise reduction structure, the invention integrates the performance advantages of the honeycomb and the ceramic in the aspect of heat insulation and the noise reduction and attenuation effects of the slotted holes on sound waves, realizes the centralized embodiment of the functions in the structure by a brazing integrated process, and can meet the use requirements of the industrial field on the combination of heat insulation and noise reduction.
Drawings
Fig. 1 is a schematic view of the thermal insulation and noise reduction structure according to the present invention.
Wherein the reference numerals are:
1 metal skin 2 ceramic filler 3 turbulent flow hole
4 wire filler 5 honeycomb core
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
The invention provides a heat insulation and noise reduction structure and a manufacturing method thereof, wherein the heat insulation and noise reduction structure comprises a filling material and a noise reduction framework structure. And the integrated molding of the filling material and the noise reduction framework structure is realized by adopting a vacuum brazing or gas shielded brazing process.
The filling material comprises 1-80% of stainless steel wires, 1-80% of high-temperature alloy wires and 10-80% of ceramic materials according to volume ratio.
According to the requirement of thermal insulation, a single filler can be selected, and mixed fillers can be adopted, including stainless steel wires, foamed metal, ceramic fiber cloth, honeycomb ceramics, compact structure ceramics and the like.
The noise reduction structure adopts a metal honeycomb structure, the skin on the sound source side is processed into a turbulent flow hole, and the skins on the two sides of the honeycomb are integrated with the honeycomb core through brazing.
Wherein, the covering near the sound source side needs to be processed with a turbulent flow hole, and the aperture size of the covering is 0.1-20 mm. And the structure is integrally formed by adopting vacuum brazing or gas shielded brazing. The brazing filler metal used for brazing can be divided into tin-based brazing filler metal, aluminum-based brazing filler metal, titanium-based brazing filler metal, nickel-based brazing filler metal, cobalt-based brazing filler metal and the like according to different materials of metal honeycombs and fillers of the components, wherein the brazing filler metal coated on the fillers is paste or powdery titanium-based brazing filler metal mixed with a binder, nickel-based brazing filler metal, cobalt-based brazing filler metal or the like.
A heat insulation and noise reduction structure and a manufacturing method thereof are realized by the following steps:
a. pretreatment of the lattice core filler: selecting an applicable brazing filler metal according to the use temperature requirement of a workpiece, and pre-coating brazing filler metal paste or brazing filler metal powder on the surfaces of the selected metal wires and the ceramic filling material;
b. filling a honeycomb core: according to the distance from the heat source, ceramic filling materials with high melting points are placed in the honeycomb core close to the heat source, and metal wire fillers are placed in the position far from the heat source;
c. skin combination: according to the distance from the sound source to the sound source, arranging the metal skin with the turbulence holes on the near sound source side, and arranging the metal skin without the turbulence holes on the far sound source side;
d. brazing integration: and selecting nickel-based brazing filler metal and titanium-based brazing filler metal to perform integral brazing of the skin and the honeycomb core according to the working condition temperature requirement.
The brazing filler metal coated on the filler comprises aluminum-based brazing filler metal, nickel-based brazing filler metal, titanium-based brazing filler metal and the like, and is used in the forms of powder, paste, adhesive tapes and the like.
The skin close to the sound source side needs to be provided with a turbulent flow hole, and the aperture size of the skin is 0.1-20 mm.
The brazing method adopted by the structure integration comprises vacuum brazing, gas shielded brazing and the like.
The integrated manufacturing method mainly comprises the steps of solder presetting and brazing. Firstly, coating the selected paste or powder solder on the outer surface of the filler, and then sequentially putting the filler into the metal honeycomb lattices. Selecting foil tape or adhesive tape brazing filler metal for brazing the honeycomb skin and placing the foil tape or the adhesive tape brazing filler metal on a welding surface of the skin and the honeycomb core; the foil brazing filler metal can be directly placed and preset by resistance spot welding, and the adhesive brazing filler metal is preset by adopting a bonding mode. And then, assembling the skin and the honeycomb core preset with the brazing filler metal, and then brazing, wherein the skin can be pressurized in a counterweight mode in the brazing process, so that the skin and the honeycomb core are tightly attached to each other at the brazing interface.
Example 1
1. Selecting a stainless steel wire and quartz fiber cloth as filling materials, and combining the stainless steel wire and the quartz fiber cloth according to the volume ratio of 70 percent to 30 percent;
2. selecting 304 stainless steel honeycombs as core grids, using 304 stainless steel foil strips with the thickness of 0.1mm as skins, and drilling through holes with the diameter of 2mm and the distance of 10mm on one of the skins;
3. selecting powdery AgCuTi brazing filler metal, preparing the powdery AgCuTi brazing filler metal into paste by using a binder, and coating the paste on the outer surfaces of stainless steel wires and quartz fiber cloth, wherein the paste is moderate in measurement;
4. sequentially placing the stainless steel wire coated with the brazing filler metal and the quartz fiber cloth into the honeycomb core, and sequentially placing the quartz fiber cloth at a higher temperature;
5. selecting a strip AgCu brazing filler metal, and respectively placing the strip AgCu brazing filler metal at contact interfaces of two sides of the honeycomb core and the skin;
6. placing the assembled component in a vacuum brazing furnace, and placing a ceramic plate at the skin on the upper surface of the component to serve as a counterweight;
7. according to the operation process of the vacuum brazing furnace, the vacuum brazing of the component is carried out at 850 ℃, and the brazing forming of the heat insulation and noise reduction structure is realized.
Claims (5)
1. The utility model provides a structure of making an uproar falls in heat insulation which characterized in that:
the noise-reduction framework is of a metal honeycomb structure, the metal skin (1) is fixed at two open ends of the honeycomb structure, the filling material is arranged in the internal space of the honeycomb structure, and the filling material is selected from metal materials and ceramic materials; the filling material comprises the following components in percentage by volume: 20-80% of a ceramic material, and the balance of a metal material, wherein the metal material is selected from one or more of stainless steel wires and high-temperature alloy wires, and the ceramic material is selected from one or more of ceramic fiber cloth, honeycomb ceramics and dense structure ceramics;
the noise reduction framework, the metal skin (1) and the filling material for heat insulation are integrated through brazing, and the structural part is prepared by the following steps:
a. pretreatment of filling materials: selecting an applicable brazing filler metal according to the use temperature requirement of the structural part, and pre-coating brazing filler metal paste or brazing filler metal powder on the surfaces of the selected metal material and ceramic material;
b. filling a honeycomb core: according to the distance from a heat source, ceramic filling materials with high melting points are placed in the honeycomb core (5) close to the heat source, and metal wire fillers are placed in the position far from the heat source;
c. skin combination: according to the distance from a sound source to a sound source, arranging a metal skin (1) with a turbulent flow hole on the near sound source side, and arranging a metal skin (1) without the turbulent flow hole on the far sound source side;
d. brazing integration: and selecting brazing filler metal to perform integral brazing of the metal skin (1) and the honeycomb core (5) according to the requirement of working condition temperature.
2. The structure of claim 1, wherein:
the noise reduction framework of the structural part is a honeycomb core (5) and a metal skin (1), a turbulent flow hole (3) is formed in the skin, and the skins at two open ends of the honeycomb core are integrated with the honeycomb core (5) through brazing.
3. The structure of claim 2, wherein:
the aperture of the turbulent flow hole (3) on the metal skin (1) is 0.1-20 mm.
4. The structural member of claim 1, wherein:
in the step a, the brazing filler metal coated on the filler is selected from aluminum-based brazing filler metal, nickel-based brazing filler metal, titanium-based brazing filler metal or cobalt-based brazing filler metal, and is used in the form of paste, adhesive tape or powder mixed with a binder.
5. The structural member of claim 1, wherein:
in the step d, the brazing filler metal adopted for the structure integration is selected from tin-based brazing filler metal, aluminum-based brazing filler metal, titanium-based brazing filler metal, nickel-based brazing filler metal and cobalt-based brazing filler metal; the brazing method comprises vacuum brazing and gas protection brazing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911307843.5A CN111169105B (en) | 2019-12-18 | 2019-12-18 | Heat-insulating and noise-reducing structural part and manufacturing method thereof |
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| CN201911307843.5A CN111169105B (en) | 2019-12-18 | 2019-12-18 | Heat-insulating and noise-reducing structural part and manufacturing method thereof |
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| CN111169105A CN111169105A (en) | 2020-05-19 |
| CN111169105B true CN111169105B (en) | 2021-05-07 |
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| CN100570268C (en) * | 2006-09-27 | 2009-12-16 | 北京航空航天大学 | Fibre-reinforced metal/ceramic laminated composite material prevention plate |
| CN205063167U (en) * | 2015-09-23 | 2016-03-02 | 广州市美伦建材有限公司 | Thermal -insulated curtain aluminium veneer of environmental protection |
| CN207132921U (en) * | 2017-08-28 | 2018-03-23 | 歌尔科技有限公司 | A kind of combination sensor |
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