CN103831592A - Manufacturing method of full-enclosed sandwich foamed aluminum structure - Google Patents
Manufacturing method of full-enclosed sandwich foamed aluminum structure Download PDFInfo
- Publication number
- CN103831592A CN103831592A CN201410091748.7A CN201410091748A CN103831592A CN 103831592 A CN103831592 A CN 103831592A CN 201410091748 A CN201410091748 A CN 201410091748A CN 103831592 A CN103831592 A CN 103831592A
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- Prior art keywords
- sandwich
- box
- shaped structure
- tracheae
- preparation
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Classifications
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- 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
-
- 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
- B23K1/008—Soldering within a furnace
-
- 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
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
A manufacturing method of a full-enclosed sandwich foamed aluminum structure is technically characterized by including the steps of 1, cutting a sandwich housing, a sandwich core and brazing material, and preparing brazing flux for use; 2, making the sandwich housing into a box structure; 3, coating the inner surface of the box structure, the outer surface of the sandwich core and the outer surface of the brazing material with the brazing flux; placing the sandwich core and the brazing material in the box structure, setting a gas guide pipe on the box structure, closing a cover, clamping with a fixture, and removing the fixture after seal welding; 4, checking for gas leakage; 5, connecting the gas guide pipe to a vacuum system and closing the gas guide pipe until high vacuity; 6, clamping a joint face of the sandwich structure with the fixture; 7, brazing in a normal pressure heating furnace; holding the temperature, discharging, and allowing for natural cooling to room temperature; 8, removing the fixture, cutting the gas guide pipe, repairing a notch by welding, and polishing. Through the application of the manufacturing method, the problems that the traditional process equipment is high in investment and high in production cost are solved.
Description
Technical field
The present invention relates to a kind of preparation method of metal sandwich structure, is a kind of preparation method of totally-enclosed sandwich foamed aluminium structural member specifically.
Background technology
Aluminum alloy foam sandwich structure has low-density, high strength, damping, energy-absorbing, falls low noise superior function, is widely used in the national economy fields such as national defense industry, building industry, rail transport.
Aluminum alloy foam sandwich structure is generally to be made by rolling, gluing and soldering processes, considers from the advantage of cost of manufacture and reliability, selects soldering processes commonplace.Traditional soldering processes carry out conventionally under special equipment vacuum or inert gas shielding condition, as in vacuum brazing furnace, carry out or use high pure nitrogen protection to carry out at tunnel-kiln type Muffle furnace.Not only equipment investment is large, and production cost is high, poor stability.Need the soldering processes of existing sandwich foamed aluminium structural member to improve for this reason.
Summary of the invention
The soldering preparation method that the object of this invention is to provide a kind of totally-enclosed sandwich foamed aluminium structural member, has fundamentally solved the problems referred to above.
The object of the present invention is achieved like this: the preparation method of this totally-enclosed sandwich foamed aluminium structural member, comprises the following steps:
1) cutting sandwich case material, sandwich core material, brazing material, for subsequent use after polishing faying face, preparation soldering flux is for subsequent use;
2) sandwich case material is made to the box-shaped structure of uncovered;
3) smear respectively soldering flux at box-shaped structure inner surface, sandwich core outer surface, brazing material outer surface; Sandwich core material is placed in box-shaped structure, and place brazing material between sandwich core material and box-shaped structure, in box-shaped structure, arrange 1 ~ 2 and be with valvular tracheae, cover lid and by clamp, will after the joint seal between lid and box-shaped structure, unload lower clamp;
4) tracheae is connected with inflator pump, detects and whether leak gas;
5) tracheae is connected with vacuum system, is evacuated to vacuum 5 × 10
-3pa, then confined bed tracheae; Or be evacuated to vacuum 5 × 10
-3pa, anti-high pure nitrogen or the argon gas of filling, then confined bed tracheae;
6) by the faying face clamp of box-shaped structure, sandwich core, brazing material;
7) in atmospheric pressure kiln, 200 ~ 630 ℃ of solderings; Insulation 5 ~ 30min comes out of the stove, and naturally cools to room temperature;
8) unload lower clamp, cutting tracheae, repair welding breach, reconditioning processing.
Preferably, described sandwich core material is selected from fine aluminium foam aluminum or aluminum alloy foamed aluminium, and foam density is 0.2 ~ 0.6g/cm
3, foam ball diameter 1mm ~ 5mm; Aluminium alloy is 1 ~ 3wt% copper preferably, and surplus aluminium forms.
Preferably, described sandwich case material is selected from pure aluminum or aluminum alloy, and aluminium alloy is 1 ~ 3wt% copper preferably, and surplus aluminium forms.
Preferably, described soldering flux is the ammonium chloride being dissolved in 5% polyvinyl alcohol water solution.
The advantage that the present invention has and positive technique effect are: the interior filled and process aluminium sheet of can that adopts metallic plate to make, soldering and sealing becomes closed structure.Through vacuum exhaust, the inner vacuum form that forms of closed structure, metallic plate and foamed aluminium be brazing material, soldering flux in addition, passes through soldering combination, sandwich structure consisting.The present invention is at common apparatus, as carried out soldering in common heat treatment stove, and without adopting special brazing equipment to carry out.And the structure of directly utilizing product itself creates the process conditions (vacuum or inert gas) of soldering in normal pressure heat-treatment furnace, airtight sandwich structure body is through proper temperature heat treatment, softening case material applies the pressure of 0.1MPa under atmospheric effect to the housing inner side of the negative pressure in vacuum, complete brazing process, be made into totally-enclosed sandwich foamed aluminium structure.Utilize airtight box-shaped structure, adopt common apparatus to produce sandwich foam brazed aluminum composite, realize dexterously the technical conditions that soldering needs, solved the problems such as traditional process equipment investment is large, producing cost is high, realize continuous productive process simultaneously, improved production efficiency.Structural member is lighter, intensity is higher, damping absorbing property is good, anti-flammability strong, it is aging, sturdy and durable to be difficult for.Therefore, can be widely used in national defense and military equipment, equipment, apparatus.As light pontoon bridge deck, civilian equipment, equipment component, improve the technological element of a product and performance.Also can be used on lift car.
The specific embodiment
embodiment 1
The preparation method of this totally-enclosed sandwich foamed aluminium structural member, vacuumizes soldering if adopt, and comprises the following steps:
1) cut the sandwich case material of aluminium alloy formation, sandwich core material, the brazing material that fine aluminium foamed aluminium forms according to Product Process size at plate shearing machine, and to preparing the faying face mechanical grinding (being equipped with stainless steel wire wheel or abrasive belt wheel polishing as adopted with the polishing machine of dust catcher) of soldering combination, make it to expose after fresh metal surface for subsequent use, preparation soldering flux is for subsequent use.Soldering flux is preferably dissolved in the ammonium chloride in 5% polyvinyl alcohol water solution.Aluminium alloy is made up of copper and the surplus aluminium of 1wt%.Foam density is 0.2 ~ 0.4g/cm
3, foam ball diameter 1mm ~ 5mm.
2) sandwich case material is made to the box-shaped structure of uncovered.When assembling, polishing surface is placed in to inboard, four vertical seams weldering.Postwelding, uses wire brush polishing in inner side to heat affected area, exposes fresh metal surface.
3) smear respectively soldering flux at box-shaped structure inner surface, sandwich core outer surface, brazing material outer surface.Sandwich core material is placed in box-shaped structure, and place brazing material between sandwich core material and box-shaped structure, in box-shaped structure, arrange one and be with valvular tracheae, cover lid and by clamp, will after the seam welded closure between lid and box-shaped structure, unload lower clamp.
4) tracheae is connected with inflator pump, at 121.2kPa(1.2 times of standard atmospheric pressure) descend detection sandwich shell whether to leak gas, air leak position is carried out to repair welding sealing.
5) wireway is connected with vacuum system, reaches condition of high vacuum degree 5 × 10
-3pa rear enclosed tracheae is installed a temperature overflow valve simultaneously, guarantees can produce the effect of the gas overflow of expanded by heating in the temperature range arranging.
6), by the faying face clamp of box-shaped structure, sandwich core, brazing material, use reading spanner to exert pressure to faying face.
7) in the atmospheric pressure kiln with fan stirring air, 200 ~ 630 ℃ of solderings.Insulation 5 ~ 30min comes out of the stove, and naturally cools to room temperature.
8) unload lower clamp, when operation, should avoid scratching sandwich surface.Cutting tracheae, uses electric angle grinder polishing, repair welding breach, reconditioning processing.
embodiment 2
If adopt filling with inert gas protection soldering, comprise the following steps:
1) cut the sandwich case material being formed by aluminium alloy, sandwich core material, the brazing material that aluminium alloy foamed aluminium forms according to Product Process size at plate shearing machine, and to for subsequent use after the faying face mechanical grinding of preparation soldering combination, make it to expose after fresh metal surface for subsequent use, preparation soldering flux is for subsequent use.Soldering flux is preferably dissolved in the ammonium chloride in 5% polyvinyl alcohol water solution.Aluminium alloy is made up of copper and the surplus aluminium of 3wt%.Foam density is 0.4 ~ 0.6g/cm
3, foam ball diameter 1mm ~ 5mm.
2) sandwich case material is made to the box-shaped structure of uncovered.When assembling, polishing surface is placed in to inboard, four vertical seams weldering.Postwelding, uses wire brush polishing in inner side to heat affected area, exposes fresh metal surface.
3) smear respectively soldering flux at box-shaped structure inner surface, sandwich core outer surface, brazing material outer surface.Sandwich core material is placed in box-shaped structure; and place brazing material between sandwich core material and box-shaped structure; bore respectively two fabrication holes in the side of box-shaped structure; one wireway is installed; check valve is installed (as the low-temperature safety valve of low-temperature solid making for one; its effect is at the soldering heating initial stage; when sandwich structure temperature reaches low-temperature solid fusion temperature; expanded by heating gas in sandwich structure can melt gap from low-temperature solid and overflow, and assurance soldering is carried out under protective atmosphere condition).Cover lid and by clamp, will after the seam welded closure between lid and box-shaped structure, unload lower clamp.
4) tracheae is connected with inflator pump, at 121.2kPa(1.2 times of standard atmospheric pressure) descend detection sandwich shell whether to leak gas, air leak position is carried out to repair welding sealing.
5) tracheae is connected with vacuum system, reaches condition of high vacuum degree 5 × 10
-3anti-filling with inert gas after Pa (preferably argon gas or nitrogen) 0.1MPa, then working pressure pincers sealing tracheae is installed a temperature overflow valve simultaneously, guarantees can produce the effect of the gas overflow of expanded by heating in the temperature range arranging.
6), by the faying face clamp of box-shaped structure, sandwich core, brazing material, use reading spanner to exert pressure to faying face.
7) in the atmospheric pressure kiln with fan stirring air, 200 ~ 630 ℃ of solderings.Insulation 5 ~ 30min comes out of the stove, and naturally cools to room temperature.
8) unload lower clamp, when operation, should avoid scratching sandwich surface.Cutting tracheae, uses electric angle grinder polishing, repair welding breach, reconditioning processing.
Claims (5)
1. a preparation method for totally-enclosed sandwich foamed aluminium structural member, is characterized in that, comprises the following steps:
1) cutting sandwich case material, sandwich core material, brazing material, for subsequent use after polishing faying face, preparation soldering flux is for subsequent use;
2) sandwich case material is made to the box-shaped structure of uncovered;
3) smear respectively soldering flux at box-shaped structure inner surface, sandwich core outer surface, brazing material outer surface; Sandwich core material is placed in box-shaped structure, and place brazing material between sandwich core material and box-shaped structure, in box-shaped structure, arrange 1 ~ 2 and be with valvular tracheae, cover lid and by clamp, will after the joint seal between lid and box-shaped structure, unload lower clamp;
4) tracheae is connected with inflator pump, detects and whether leak gas;
5) tracheae is connected with vacuum system, is evacuated to vacuum 5 × 10
-3pa, then confined bed tracheae; Or be evacuated to vacuum 5 × 10
-3pa, anti-high pure nitrogen or the argon gas of filling, then confined bed tracheae;
6) by the faying face clamp of box-shaped structure, sandwich core, brazing material;
7) in atmospheric pressure kiln, 200 ~ 630 ℃ of solderings; Insulation 5 ~ 30min comes out of the stove, and naturally cools to room temperature;
8) unload lower clamp, cutting tracheae, repair welding breach, reconditioning processing.
2. preparation method according to claim 1, is characterized in that: described sandwich core material is selected from fine aluminium foam aluminum or aluminum alloy foamed aluminium, and foam density is 0.2 ~ 0.6g/cm
3, foam ball diameter 1mm ~ 5mm.
3. preparation method according to claim 1, is characterized in that: described sandwich case material is selected from pure aluminum or aluminum alloy.
4. according to the preparation method described in claim 2 or 3, it is characterized in that: described aluminium alloy is by 1 ~ 3wt% copper, and surplus aluminium forms.
5. preparation method according to claim 1, is characterized in that: described soldering flux is the ammonium chloride being dissolved in 5% polyvinyl alcohol water solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410091748.7A CN103831592B (en) | 2014-03-13 | 2014-03-13 | Method for manufacturing totally-enclosed sandwich foamed aluminum structural member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410091748.7A CN103831592B (en) | 2014-03-13 | 2014-03-13 | Method for manufacturing totally-enclosed sandwich foamed aluminum structural member |
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|---|---|
| CN103831592A true CN103831592A (en) | 2014-06-04 |
| CN103831592B CN103831592B (en) | 2021-03-02 |
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| CN201410091748.7A Active CN103831592B (en) | 2014-03-13 | 2014-03-13 | Method for manufacturing totally-enclosed sandwich foamed aluminum structural member |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110181136A (en) * | 2019-06-28 | 2019-08-30 | 吴忠仪表有限责任公司 | Tab (s) formula labyrinth valve cage mounted structure method for welding |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07115435B2 (en) * | 1990-11-05 | 1995-12-13 | 三菱電機株式会社 | Honeycomb sandwich plate and method for manufacturing the same |
| CN101875142A (en) * | 2010-03-11 | 2010-11-03 | 常州苏晶电子材料有限公司 | Furnace brazing method using vacuum fixture |
| CN102922072A (en) * | 2012-10-30 | 2013-02-13 | 西安航空动力股份有限公司 | Vacuum brazing method utilizing copper nickel cobalt manganese brazing filler metal |
| CN103056466A (en) * | 2012-12-21 | 2013-04-24 | 哈尔滨工业大学 | Vacuum brazing method of beforehand vacuum sealing welding |
| CN103286404A (en) * | 2013-05-23 | 2013-09-11 | 中南大学 | Preparation method of foamed-aluminum sandwiched-structure materials |
-
2014
- 2014-03-13 CN CN201410091748.7A patent/CN103831592B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07115435B2 (en) * | 1990-11-05 | 1995-12-13 | 三菱電機株式会社 | Honeycomb sandwich plate and method for manufacturing the same |
| CN101875142A (en) * | 2010-03-11 | 2010-11-03 | 常州苏晶电子材料有限公司 | Furnace brazing method using vacuum fixture |
| CN102922072A (en) * | 2012-10-30 | 2013-02-13 | 西安航空动力股份有限公司 | Vacuum brazing method utilizing copper nickel cobalt manganese brazing filler metal |
| CN103056466A (en) * | 2012-12-21 | 2013-04-24 | 哈尔滨工业大学 | Vacuum brazing method of beforehand vacuum sealing welding |
| CN103286404A (en) * | 2013-05-23 | 2013-09-11 | 中南大学 | Preparation method of foamed-aluminum sandwiched-structure materials |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110181136A (en) * | 2019-06-28 | 2019-08-30 | 吴忠仪表有限责任公司 | Tab (s) formula labyrinth valve cage mounted structure method for welding |
| CN110181136B (en) * | 2019-06-28 | 2021-08-10 | 吴忠仪表有限责任公司 | Brazing method for butterfly piece type labyrinth valve cage installation structure |
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| CN103831592B (en) | 2021-03-02 |
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