阅读说明：本技术 一种金属蜂窝芯的制备方法及金属蜂窝板的制备方法 (Preparation method of metal honeycomb core and preparation method of metal honeycomb plate ) 是由 林君山 于 2019-10-14 设计创作，主要内容包括：本发明属于铝制蜂窝芯的加工技术领域,尤其是一种金属蜂窝芯的制备方法及金属蜂窝板的制备方法。金属蜂窝芯的制备方法包括如下步骤：S1、准备焊料和阻焊支撑料置于涂布机中；S2、将箔材送入涂布机；S3、利用涂布机在箔材表面以等间距间隔涂布阻焊支撑料和焊料,箔材上涂布焊料的区域为结合区,涂布阻焊支撑料的区域为支撑区,结合区和支撑区一一交错排布；S4、将箔材按需要的长度进行裁切然后叠层；S5、炉内钎焊或扩散焊；S6、焊后拉伸成金属蜂窝芯成品。它解决了现有金属蜂窝芯制备工艺中钎焊材料漫流后箔材结合无法分开的技术缺陷。阻焊支撑料可以清洗,也可以不清洗；采用具有双涂覆单元的涂布机生产效率更高,涂布位置更精准。(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.)

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;

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 width of the support region is 3 times the width of the bonding region.

4. 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.

5. 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.

6. 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.

7. The method of claim 1, wherein the metal honeycomb core is formed by a process comprising the steps of,

the coater in step S3 is a double coating unit coater that coats solder resist support material and solder material on the foil.

8. 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.

9. 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.

10. 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 1-9, 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.

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.