CN110587052B - Preparation method of metal honeycomb core and preparation method of metal honeycomb plate - Google Patents

Preparation method of metal honeycomb core and preparation method of metal honeycomb plate Download PDF

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Publication number
CN110587052B
CN110587052B CN201910974948.XA CN201910974948A CN110587052B CN 110587052 B CN110587052 B CN 110587052B CN 201910974948 A CN201910974948 A CN 201910974948A CN 110587052 B CN110587052 B CN 110587052B
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foil
solder
honeycomb core
coating
metal honeycomb
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CN110587052A (en
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林君山
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Qingdao Guilai Technology Co ltd
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Qingdao Guilai Technology Co ltd
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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
    • B23K1/008—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
    • B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • B23K3/06—Solder feeding devices; Solder melting pans
    • 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
    • B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • B23K3/08—Auxiliary devices therefor
    • 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

Abstract

The invention belongs to the technical field of processing of aluminum honeycomb cores, and particularly relates to a preparation method of a metal honeycomb core and a preparation method of a metal honeycomb plate. The preparation method of the metal honeycomb core comprises the following steps: s1, preparing solder and solder resist support materials and placing the solder and the solder resist support materials in a coating machine; s2, feeding the foil into a coating machine; s3, coating solder resist support materials and solder at equal intervals on the surface of the foil by using a coating machine, wherein the area coated with the solder on the foil is a combination area, the area coated with the solder resist support materials is a support area, and the combination area and the support area are arranged in a staggered manner one by one; s4, cutting the foil according to the required length and then laminating; s5, furnace brazing or diffusion welding; and S6, stretching the honeycomb core after welding to obtain a finished product of the metal honeycomb core. The method overcomes the technical defect that foil combination cannot be separated after brazing materials overflow in the existing metal honeycomb core preparation process. The solder resist support material can be cleaned or not cleaned; the coating machine with the double coating units is higher in production efficiency and more accurate in coating position.

Description

Preparation method of metal honeycomb core and preparation method of metal honeycomb plate
Technical Field
The invention relates to the technical field of production and processing of honeycomb plates, in particular to a preparation method of a metal honeycomb core and a preparation method of a metal honeycomb plate.
Background
The honeycomb plate structure has the characteristics of small density, high rigidity, good stability and excellent sound and heat insulation performance, and is widely applied to the fields of aerospace, transportation, architectural decoration and the like, and the core material is mainly used for realizing the performance because of adopting a honeycomb structure.
The existing market is mainly the traditional gluing honeycomb core, and the honeycomb core has the defects of being limited by the physical properties of a high-molecular binder, and having the limitations of high temperature resistance, fire resistance, durability and environmental protection performance. In recent years, the gradually popular brazed honeycomb core, besides inheriting the advantages of the glued honeycomb core, overcomes the defects of the traditional honeycomb core, and is the mainstream direction of the development of the honeycomb core in the future.
The invention patent 201710847970.9 relates to a method for manufacturing a welded aluminum honeycomb core and a special adhesive, which comprises the steps of preparing aluminum foil into honeycomb by using an adhesive, and then removing adhesive and brazing. In order to ensure that the honeycomb can be formed, enough adhesive must be available, which makes the adhesive basically remained in the original place (soldering zone) after carbonization during the adhesive removing process difficult to remove, so that large-area cold joint is easy to occur after soldering, and the shearing strength of the honeycomb core is poor.
The invention patent of 201310003242.1, entitled "method for manufacturing metal honeycomb core and honeycomb sandwich panel", provides a method for manufacturing metal honeycomb core and honeycomb panel manufactured by using the honeycomb core, which mainly performs interval coating when brazing material is coated on the surfaces of foils, so that two adjacent foils are only metallurgically bonded at the positions coated with brazing material when brazing, but ignores that the brazing material is melted at high temperature and rapidly spreads on the whole surface of the foils under capillary action, so that the two adjacent foils are integrally and completely welded when brazing, and the step of subsequently stretching into the honeycomb core cannot be performed. Therefore, the prior art has the problem that foil combination can not be separated after the brazing material flows over during brazing, so that the foil combination can not be stretched into a honeycomb core.
Disclosure of Invention
The invention aims to solve the problems and provides a preparation method of a metal honeycomb core and a preparation method of a metal honeycomb plate, which solve the technical defect that foil combination cannot be separated after brazing materials overflow in the existing preparation process of the metal honeycomb core, and adopt the following technical scheme:
a preparation method of a metal honeycomb core is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing solder and solder resist support materials and placing the solder and the solder resist support materials in a coating machine;
s2, feeding the foil into a coating machine;
s3, coating solder resist support materials and solder at equal intervals on the surface of the foil by using a coating machine, wherein the area coated with the solder on the foil is a combination area, the area coated with the solder resist support materials is a support area, and the combination area and the support area are arranged in a staggered manner one by one;
s4, cutting the foil according to the required length and then laminating;
s5, furnace brazing or diffusion welding;
and S6, stretching the honeycomb core after welding to obtain a finished product of the metal honeycomb core.
On the basis of the technical scheme, the welding flux for removing the oxidation film is mixed in the welding flux.
On the basis of the technical scheme, the width of the supporting area is 3 times of that of the combining area.
Preferably, the solder resist support material is mixed with a binder, and the solder is mixed with the binder.
Optionally, the foil is an aluminum foil.
On the basis of the above technical solution, the lamination in step S4 is stacked up and down according to the bonding area of one layer of foil being located at the center of the supporting area of the adjacent layer of foil.
Preferably, the coater in step S3 is a double coating unit coater that coats solder while coating solder resist support material on the foil.
Optionally, the temperature during brazing in the step S5 is 450-700 ℃, the pressure is 0-6 MPa, and the heat preservation time is 0-30 min.
On the basis of the above technical solution, the step S6 further includes a cleaning step after welding and before stretching.
On the basis of the technical scheme, the method further comprises the step of pretreating the foil to remove oil stains on the surface before the step S2.
A preparation method of a metal honeycomb plate is characterized by comprising the following steps: the preparation method of the metal honeycomb core comprises the following steps:
preparing a metal panel;
coating the brazing filler metal;
fixing the metal panel and the metal honeycomb core;
and brazing the metal panel and the metal honeycomb core.
The invention has the following advantages: firstly, the problem that brazing flux overflows between foils to cause the whole combination of two layers of foils in the patent with the application number of 201310003242.1 is effectively avoided according to the metal honeycomb core and the metal honeycomb plate produced by the method, and meanwhile, in the patent with the application number of 201710847970.9, the foils are subjected to interval gluing, then hot pressing, a plane net puller is placed to be unfolded into the honeycomb core material, and finally, a brazing furnace is required to be placed to perform the complicated steps of multi-section heating and pressurizing to remove glue and braze, and the false welding condition is caused when the glue is not completely removed.
Secondly, weld the welding-resistant supporting material that leaves on the foil surface after brazing according to this application and can wash, also can not wash, if the metal honeycomb core exposes the use, then need the sanitization, guarantee pleasing to the eye. If the metal honeycomb plate is further manufactured, the metal honeycomb plate does not need to be cleaned. Because the structure is a relatively loose structure and has the functions of sound absorption and energy absorption, the solder resist support material can improve the effects of vibration reduction and noise reduction.
And thirdly, the coating machine with the double coating units has higher efficiency and more accurate coating position.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary of the invention, and that other embodiments can be derived from the drawings provided by those skilled in the art without inventive effort.
FIG. 1: is a flow chart of the present invention;
FIG. 2: the invention is a schematic view of a top view structure of each division of the surface of the foil;
FIG. 3: is a structural schematic diagram of the coating material of the invention after being attached to the surface of the foil;
FIG. 4: is a schematic structural diagram of the double-coating unit coating machine;
FIG. 5: is a schematic structural diagram of the floating rubber roller;
Detailed Description
The invention is further illustrated by the following figures and examples:
reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1 to 3, a method for manufacturing a metal honeycomb core is characterized in that: the method comprises the following steps:
s1, preparing solder and solder resist support materials and placing the solder and the solder resist support materials in a coating machine;
s2, feeding the foil into a coating machine;
s3, coating solder resist support materials and solder at equal intervals on the surface of the foil by using a coating machine, wherein the area coated with the solder on the foil is a combination area 1, the area coated with the solder resist support materials is a support area 2, and the combination area 1 and the support area 2 are arranged in a staggered mode one by one; the width of the support region is 3 times the width of the bonding region.
S4, cutting the foil 5 according to the required length and then laminating; the lamination is arranged according to the central position of the supporting area of the lower layer foil adjacent to the combining area of the upper layer foil;
s5, furnace brazing, wherein when brazing is carried out, the brazing material is brazing material;
and S6, putting the honeycomb core into a plane net puller after welding and stretching the honeycomb core into a finished product of the metal honeycomb core.
The invention aims to solve the technical defect that foil combination cannot be separated after brazing materials overflow in the existing metal honeycomb core preparation process, and based on the technical defect, a coater is utilized to coat solder resist support materials 4 and solder 3 on the surface of the foil at equal intervals, the area coated with the solder on the foil is a combination area 1, the area coated with the solder resist support materials is a support area 2, and the combination area 1 and the support area 2 are arranged in a staggered mode one by one; on one hand, the solder resist support material is utilized to isolate the bonding area so as to prevent the solder of the bonding area from overflowing during soldering, thereby solving the problem that the non-bonding area (support area) can not be pulled open; on the other hand, the aluminum foil can be supported to a certain extent, and the problem of metallurgical bonding caused by contact of the aluminum foil in the supporting area is prevented.
Example 2
As shown in fig. 1 to 3, a method for manufacturing a metal honeycomb core is characterized in that: the method comprises the following steps:
s1, preparing solder and solder resist support material, placing the solder and solder resist support material in a coating machine,
pretreating the foil to remove oil stains on the surface;
s2, feeding the foil material such as common aluminum foil into a coating machine;
s3, coating solder resist support materials and solder at equal intervals on the surface of the foil by using a coating machine, wherein the area coated with the solder on the foil is a combination area 1, the area coated with the solder resist support materials is a support area 2, and the combination areas and the support areas are arranged in a staggered manner one by one; for example, the main component of the solder resist support material may be Al2O3Or MgO or SiC, the main component of the solder can be aluminum-silicon brazing powder;
s4, cutting the foil 5 according to the required length and then laminating; the lamination is arranged according to the central position of the supporting area of the lower layer foil which is adjacent to the combining area of the upper layer foil 5; taking the bottommost foil 5 as an example, a solder resist support material is coated on the support areas, a bonding area 1 is separated between each support area, a layer of foil is stacked on the bottommost foil, the bonding area 1 of the bottommost foil is positioned at the center of the support area 2 of the upper layer of foil, a bonding area 1 is separated between the support areas 2, and the like;
s5, brazing in a furnace under the protection of nitrogen or argon, wherein the temperature during brazing is 450-700 ℃, the pressure is 0-6 MPa, and the heat preservation time is 0-30 min;
and S6, stretching the honeycomb core after welding to obtain a finished product of the metal honeycomb core.
In order to remove the oxide film on the surface of the foil 5 and thereby perform better soldering, the solder 3 is mixed with flux for removing the oxide film.
Preferably, the width of the support region 2 is 3 times the width of the bonding region 1.
In order to meet the requirement of mass production of the honeycomb panel, the solder resist support 4 mixed with the binder and the solder 3 mixed with the binder are prevented from falling off the foil.
Preferably, the coater in step S3 is a double coating unit coater that coats solder while coating solder resist support material on the foil. It will be appreciated that the solder coating unit may be upstream or the solder resist support coating unit may be upstream in a manner different from the manner in which the entire sheet of foil is coated with solder resist support before the entire sheet is coated with solder. The efficiency is higher, and the coating position is more accurate.
As shown in fig. 4 and 5, the dual coating unit coater may have the following structure:
including blowing unit 100, first coating unit 200, second coating unit 300, storage unit 400 and cutting unit 500, blowing unit 100, first coating unit 200, second coating unit 300, storage unit 400 and cutting unit 500 are arranged by upper reaches to low reaches in proper order, blowing unit 100 is including being used for treating the tension of coating foil and carrying out the tension control mechanism that controls, tension control mechanism includes a plurality of tension control roller 10, first coating unit 200 includes hopper 20, version roller 21 and unsteady rubber roll 22, the bottom of version roller 21 is submerged in hopper 20, unsteady rubber roll 22 is located version roller 21 top, it forms the coating station to float between rubber roll 22 and the version roller 21, second coating unit 300 structure is the same with first coating unit 200 structure, the support is hindered to one splendid attire in hopper 20 of first coating unit 200 and the hopper of second coating unit 300, the other contains solder; the storage unit includes a plurality of transition roller 40, and the foil is the S type around being arranged on transition roller 40, cut unit 500 includes because the drive mechanism 50 that pulls the foil and move ahead with be used for cutting the mechanism that cuts to the foil.
Further, the floating rubber roller 22 of the first coating unit 200 is connected with the frame of the first coating unit 200 in a sliding manner, and can float up and down relative to the frame; a plurality of linear type plate lines 21a which are uniformly distributed at intervals are formed on the surface of the plate roller 21 in a protruding mode, and the floating rubber roller of the second coating unit 300 is connected with the rack of the second coating unit 300 in a sliding mode and can float up and down relative to the rack.
It should be noted that, as known to those skilled in the art, the following are: the existing coating machines are all coating equipment with only one coating unit, and because the solder is necessary, on the basis, if only one material can be coated, only the solder can be coated, and if the solder and the solder mask support material are coated, the solution can be obtained only by changing the coating machine (for coating the solder) to coat the solder after the solder mask support material is coated on the whole foil material by logical analysis and reasoning.
Further, the step S6 includes a cleaning step after welding and before stretching. If the metal honeycomb core is exposed for use, the solder resist support material can be washed away to keep the appearance, if the metal honeycomb plate is further manufactured, the metal honeycomb plate does not need to be washed, the structure is a relatively loose structure and has the functions of sound absorption and energy absorption, and the solder resist support material can improve the effects of vibration reduction and noise reduction.
Cooling to below 450 ℃ before cleaning after welding and discharging.
A preparation method of a metal honeycomb plate is characterized by comprising the following steps: the preparation method of the metal honeycomb core comprises the following steps:
preparing a metal panel;
coating the brazing filler metal;
fixing the metal panel and the metal honeycomb core;
and brazing the metal panel and the metal honeycomb core.
Example 3
As shown in fig. 1 to 3, a method for manufacturing a metal honeycomb core is characterized in that: the method comprises the following steps:
s1, preparing solder and solder mask supporting materials, placing the solder and the solder mask supporting materials in a coating machine, and mixing the solder with a flux for removing an oxide film in order to remove the oxide film on the surface of the foil material and further perform better soldering;
s2, feeding the foil into a coating machine;
s3, coating solder resist support materials and solder at equal intervals on the surface of the foil by using a coating machine, wherein the area coated with the solder on the foil is a combination area 1, the area coated with the solder resist support materials is a support area 2, and the combination areas and the support areas are arranged in a staggered manner one by one; the width of the support area is 3 times of that of the bonding area, and the solder-resisting support material can avoid the boundary diffusion during diffusion welding;
s4, cutting the foil according to the required length and then laminating; the lamination is arranged according to the central position of the supporting area of the lower layer foil adjacent to the combining area of the upper layer foil;
s5, diffusion welding in a furnace;
and S6, putting the honeycomb core into a plane net puller after welding and stretching the honeycomb core into a finished product of the metal honeycomb core.
Compared with the prior art, the embodiment has at least the following advantages:
1. this application hinders the solder resist support material in the coating of support area, can make the foil that the stromatolite ended effectively avoid because of the metallurgical combination of support area that brazing material overflow when brazing in the stove of brazing, two-layer foil is whole when having avoided brazing pastes together about, can't stretch into the problem of honeycomb core.
2. The solder resist support material left on the surface of the foil after the brazing is finished according to the embodiment can be cleaned or not, and if the metal honeycomb core is exposed for use, the metal honeycomb core needs to be cleaned, so that the appearance is ensured. If the metal honeycomb plate is further manufactured, the metal honeycomb plate does not need to be cleaned. Because the structure is a relatively loose structure and has the functions of sound absorption and energy absorption, the solder resist support material can improve the effects of vibration reduction and noise reduction.
The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.

Claims (8)

1. A preparation method of a metal honeycomb core is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing solder and solder resist support materials and placing the solder and the solder resist support materials in a coating machine;
s2, feeding the foil into a coating machine;
s3, coating solder resist support materials and solder at equal intervals on the surface of the foil by using a coating machine, wherein the area coated with the solder on the foil is a combination area, the area coated with the solder resist support materials is a support area, and the combination area and the support area are arranged in a staggered manner one by one; the width of the support region is 3 times of the width of the bonding region; the coater in the step S3 is a double-coating-unit coater, which coats solder resist support material and solder on the foil; the dual coating unit coater may have the following structure: the device comprises a discharging unit, a first coating unit, a second coating unit, a storage unit and a cutting unit, wherein the discharging unit, the first coating unit, the second coating unit, the storage unit and the cutting unit are sequentially arranged from upstream to downstream, the discharging unit comprises a tension control mechanism for controlling the tension of foil to be coated, the tension control mechanism comprises a plurality of tension control rollers, the first coating unit comprises a hopper, a printing roller and a floating rubber roller, the bottom of the printing roller is submerged in the hopper, the floating rubber roller is positioned above the printing roller, a coating station is formed between the floating rubber roller and the printing roller, the second coating unit is identical in structure with the first coating unit, one of the hopper of the first coating unit and the hopper of the second coating unit is filled with a solder-resisting support material, and the other is filled with solder; the cutting unit comprises a traction mechanism for drawing the foil to move forward and a cutting mechanism for cutting the foil;
s4, cutting the foil according to the required length and then laminating;
s5, furnace brazing or diffusion welding;
and S6, stretching the honeycomb core after welding to obtain a finished product of the metal honeycomb core.
2. The method of claim 1, wherein the metal honeycomb core is formed by a process comprising the steps of,
the solder is mixed with a flux for removing an oxide film.
3. The method of claim 1, wherein the metal honeycomb core is formed by a process comprising the steps of,
the solder resist support material is mixed with a binder, and the solder is mixed with the binder.
4. The method of claim 1, wherein the metal honeycomb core is formed by a process comprising the steps of,
the foil is an aluminum foil.
5. The method of claim 1, wherein the metal honeycomb core is formed by a process comprising the steps of,
the lamination in step S4 is performed such that the bonding area of the upper foil is located at the center of the supporting area of the adjacent lower foil.
6. The method of claim 1, wherein the metal honeycomb core is formed by a process comprising the steps of,
the step S6 further includes a cleaning step after welding and before stretching.
7. The method of claim 1, wherein the metal honeycomb core is formed by a process comprising the steps of,
the method also comprises the step of pretreating the foil to remove oil stains on the surface before the step S2.
8. A preparation method of a metal honeycomb plate is characterized by comprising the following steps: a method of making a metal honeycomb core comprising any one of claims 1-7, further comprising the steps of:
preparing a metal panel;
coating the brazing filler metal;
fixing the metal panel and the metal honeycomb core;
and brazing the metal panel and the metal honeycomb core.
CN201910974948.XA 2019-10-14 2019-10-14 Preparation method of metal honeycomb core and preparation method of metal honeycomb plate Active CN110587052B (en)

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CN111151913B (en) * 2020-01-22 2022-02-01 郑州机械研究所有限公司 Brazing paste, preparation method thereof and preparation method of aluminum alloy honeycomb plate
CN112958900A (en) * 2021-03-10 2021-06-15 上海交通大学 Diffusion welding structure and method for ultra-multilayer thin-wall metal component
CN113399858A (en) * 2021-04-25 2021-09-17 郑州机械研究所有限公司 Composite brazing filler metal for brazing, preparation method thereof and hard alloy cutter
CN113634947A (en) * 2021-08-25 2021-11-12 郑州机械研究所有限公司 Composite brazing filler metal for hard alloy brazing and preparation method thereof

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