CN114770055A - Curved surface metal honeycomb rapid forming method based on paper-cut structure - Google Patents
Curved surface metal honeycomb rapid forming method based on paper-cut structure Download PDFInfo
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- CN114770055A CN114770055A CN202210685346.4A CN202210685346A CN114770055A CN 114770055 A CN114770055 A CN 114770055A CN 202210685346 A CN202210685346 A CN 202210685346A CN 114770055 A CN114770055 A CN 114770055A
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 38
- 239000002184 metal Substances 0.000 title claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 239000002655 kraft paper Substances 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 6
- 238000003486 chemical etching Methods 0.000 claims description 4
- 238000003698 laser cutting Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229920000271 Kevlar® Polymers 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000004761 kevlar Substances 0.000 claims description 2
- 239000000123 paper Substances 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 238000004026 adhesive bonding Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 230000005489 elastic deformation Effects 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000013585 weight reducing agent Substances 0.000 abstract description 2
- 239000010935 stainless steel Substances 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 239000011162 core material Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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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
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Abstract
The invention discloses a curved surface metal honeycomb rapid forming method based on a paper-cut structure. Based on the traditional Chinese paper-cutting process, the invention processes and cuts a thin-wall material with a certain size according to a specific mode and a specific direction, and then the thin-wall material is pulled and stretched to form a polygonal honeycomb unit shape; the units are connected by honeycomb materials without gluing, and the honeycomb material is particularly suitable for curved surface structures. The honeycomb forming process has the characteristics of simple processing operation, quick honeycomb forming and low processing cost, and compared with the traditional honeycomb forming process, the honeycomb forming process can realize automatic production and greatly improve the honeycomb forming production efficiency; the formed metal honeycomb has light weight and large elastic deformation range, has better oblique bearing effect within the range of +/-30 degrees of a vertical honeycomb panel, and is expected to be applied to links of collision energy absorption, fire prevention, heat insulation, material reduction, weight reduction and the like of devices such as building construction, logistics transportation, transportation equipment, aerospace and the like.
Description
Technical Field
The invention relates to the technical field of advanced intelligent structures, in particular to a curved surface metal honeycomb rapid forming method based on a paper-cut structure.
Background
The metal honeycomb structure has excellent performances such as high wind pressure resistance, shock absorption, sound insulation, heat preservation, flame retardance, specific strength and high specific stiffness (the specific strength and the specific stiffness are proper terms, the specific strength is the ratio of the tensile strength of a material to the apparent density of the material, and the legal unit is N/tex).
The main methods for manufacturing honeycomb core materials are molding and drawing. The forming method needs to press the metal sheet belt into a corrugated shape and then weld or glue the metal sheet belt into a honeycomb shape, so that the preparation efficiency is low; the earlier-stage gluing of the stretching method has high requirements on gluing width, glue material component proportion and glue bonding force, and the factors have great influence on the structural size and mechanical stability of the metal honeycomb core material.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the method for quickly forming the curved-surface metal honeycomb based on the paper-cut structure can be used for quickly preparing and forming the polygonal honeycomb unit-shaped metal honeycomb through simple processing operation on a thin-wall material, and is expected to be applied to links of collision energy absorption, fire prevention, heat insulation, material reduction, weight reduction and the like of devices such as building construction, logistics transportation, transportation equipment, aerospace and the like due to the characteristics of light weight, large elastic deformation range and good oblique force bearing effect.
The invention provides a curved surface metal honeycomb rapid forming method based on a paper-cut structure, which comprises the following steps:
the method comprises the following steps: according to the outline dimension of the required honeycomb structure, taking a thin-wall material with the length and width dimension of L multiplied by W and the thickness t far smaller than the length L and the width W;
step two: processing a plurality of paper-cut-shaped cuts on the thin-wall material according to the shape and size of the honeycomb units required by the honeycomb structure in the step one, wherein the paper-cut-shaped cuts penetrate through the front end face and the rear end face of the thin-wall material; the relationship between the size of the metal honeycomb and the size of the thin-wall material in the first step depends on the shape and the size of the honeycomb unit, and the shape and the size of the honeycomb unit can be determined by the length a of the paper-cut cuts and the distance b between every two paper-cut cuts in the same row: when the length a of each corner of the hexagonal honeycomb unit and the length a of the notch are fixed, the larger the interval b of the notches in the same row is, the longer the hexagonal honeycomb unit is, the smaller the required thin-wall material L is, and the larger W is.
Step three: and (3) uniformly stretching and unfolding the thin-wall material treated in the step two along the direction vertical to the paper-cut-shaped cuts by adopting a stretcher and a clamp to form a honeycomb structure consisting of hexagonal honeycomb units. The paper-cut-shaped notches in the third step are not necessarily arranged according to the same rule, and the combination design of the notch density and length can be carried out according to the actual requirement, so that the metal honeycomb units of all parts are combined and arranged in different sizes and shapes, and the gradient honeycomb structure suitable for different environmental working conditions is obtained.
As a further improvement of the above scheme, the paper-cut notches in the second step are distributed in a parallel staggered manner on the thin-wall material, the distance between every two paper-cut notches in the same row is b, the length of the paper-cut notch is a, and the row distance of the paper-cut notches in adjacent rows is h.
As a further improvement of the scheme, in the third step, a metal honeycomb consisting of hexagonal honeycomb units with side lengths of b and 1/2 (a-b) is formed.
As a further improvement of the above scheme, in the second step, the paper-cut cuts are made by die cutting, laser cutting, wire cutting or chemical etching.
As a further improvement of the above solution, the thin material is a material having a certain tear strength, shear strength and plasticity and capable of being stretch-formed after the paper-cut-out is processed, for example, a metal material (stainless steel, aluminum alloy, etc.), a glass fiber fabric impregnated with resin, an aromatic fiber paper, kraft paper, graphite fiber, or kevlar fiber.
As a further improvement of the scheme, the honeycomb structure manufactured by the method is suitable for plane, curved surface and multi-dimensional solid surface, and has the advantages of large elastic deformation range, no adhesive joint, welding, continuous paper-cut structure material, stable mechanical property and the like.
The beneficial effects of the invention are:
compared with the prior art, the method for quickly forming the curved-surface metal honeycomb based on the paper-cut structure provided by the invention has the advantages that a certain regular notch is firstly processed on a thin-wall material, and then the metal honeycomb is formed to a certain extent by uniformly stretching the thin-wall material. The rapid forming method does not need processes such as gluing, welding and the like, and avoids the problems of complex processes, multiple processes and multiple influence factors of a forming method and a stretching method; meanwhile, the metal honeycomb under the forming method is formed by stretching a single honeycomb core material without gluing and welding, so that gluing and welding materials are saved, the mechanical property of the metal honeycomb is more stable, and the formed metal honeycomb is lighter; because the honeycomb after stretch forming is not completely vertical to the stretching plane/honeycomb panel, the formed honeycomb has better oblique bearing effect within the range of +/-30 degrees vertical to the honeycomb panel; the honeycomb forming method in the scheme has the characteristics of no glue joint, no welding and continuous paper-cut structural material, so that the transverse elastic deformation range is larger, and the honeycomb forming method is particularly suitable for quickly forming the honeycomb component with the curved surface structure.
The invention can solve the problems of complex forming process and multiple working procedures of the existing metal honeycomb core; the influence of factors such as gluing width, glue material component proportion, glue bonding force and the like on the performance stability of the metal honeycomb core material in the stretching method and the forming method is large; and the problems that the whole components of the prepared honeycomb material are not uniform and the mechanical property is poor due to other materials added in the welding material. The invention combines the traditional Chinese paper-cutting process and scientific analysis experiments, uses thin-wall materials as raw materials, and carries out outer contour cutting, forming notch processing and stretching, unfolding and forming on the raw materials to obtain the metal honeycomb which is lighter, has more stable mechanical property, larger elastic deformation range and better oblique bearing effect in a certain range. Compared with the prior art, the invention has the following advantages: the processing operation is simple, the honeycomb forming efficiency is high, and the processing cost is low; the formed metal honeycomb has light weight and high specific energy absorption; the mechanical property is more stable, the elastic deformation range is large, and the method is particularly suitable for the rapid forming of the honeycomb component with the curved surface structure; the oblique force bearing effect of the oblique honeycomb after stretch forming is better within a certain range; the size and shape of the metal honeycomb units at different positions can be designed according to actual needs, and the metal honeycomb suitable for different environmental working conditions is obtained.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a schematic view of a thin-walled material slit of the present invention;
FIG. 2 is a side shot view of a kraft paper honeycomb made in accordance with the invention;
FIG. 3 is a graph showing the effect of example 1 of the present invention;
fig. 4 is a graph showing the effect of example 2 of the present invention.
Detailed Description
As shown in fig. 1 and 2, in the method for quickly forming a curved metal honeycomb based on a paper-cut structure provided by the invention, a thin-wall material with a thickness dimension much smaller than a length dimension and a width dimension is taken, and the thin-wall material includes but is not limited to a metal material. Designing the notch size according to the size requirement of the honeycomb structure, such as the height of a honeycomb core is not more than 2h, the side length of a hexagonal honeycomb is b and 1/2 (a-b), so that the notch size is designed as follows: the length of the notches is a, the interval of the notches in the same row is b, the row interval of the notches is h, and the notches in adjacent rows are arranged in a staggered mode. Through cross cutting machine, laser cutting machine, linear cutting machine or chemical etching machine, according to the incision size and the mode of arranging that design, carry out the incision processing on thin wall material surface, each leaves a fillet about the incision, the effect of fillet is the in-process that prevents the drawing, and the kneck stress concentration leads to the incision to tear open, and its surface paper-cut form incision is as shown in figure 1, and wherein and the incision runs through thin wall material marginal portion, respectively leaves some not processing the incision so that reserve the centre gripping space for follow-up drawing processing from top to bottom. And fixing the thin-wall material with the paper-cut-shaped cut in a pressing plate clamp of a drawing machine, wherein the clamping parts of the clamp are two ends in the drawing direction. If the clamping range of the clamp is not enough, the base plate can be properly filled to enable clamping to be tighter and more stable, the clamp is installed and fixed on the puller of the stretcher, and the stretching displacement speed of the stretcher is set to be about 20 mm/min. And starting the stretcher, wherein the stretching process is uniform stretching and is carried out along the direction vertical to the cut. When the stretching displacement distance reaches 20% -40% of the length of the thin-wall material, or the deformation of the thin-wall material cut enables the thin-wall material to be formed into a hexagonal shape, the stretching machine is stopped. After the uniform stretching, the thin-wall material is subjected to plastic deformation to form hexagonal honeycomb units, and the metal honeycomb structure is obtained after simple shape correction. The honeycomb structure comprises a curved surface, a plane and a multi-dimensional solid surface. The method of uniform stretching includes, but is not limited to, the use of a stretching machine and a special fixture.
The technical scheme of the invention selects specific embodiments to be explained as follows:
example 1:
the embodiment 1 of the invention is a kraft paper honeycomb based on a paper-cut structure, which is quickly formed by adopting the method.
The steps of this example are as follows:
the method comprises the following steps: taking kraft paper with the thickness of 115 micrometers, the width of 120mm and the length of 180 mm;
step two: the surface of the kraft paper is processed, and the parameters of the notch of the paper-cut section formed by processing are respectively as follows: the length of the notch is 12.6 mm, the width of the notch is 0.3 mm, the two ends of the notch are rounded, the radius of the rounded corner is 0.15 mm, the distance between the notches is 4.5 mm, the longitudinal row spacing is 3 mm, the number of the notch rows is 21, the adjacent rows are arranged in a staggered manner, and the notch gap is opposite to the center of the notch of the adjacent row;
step three: the upper end and the lower end of the treated kraft paper are clamped by clamping plates, so that the treated kraft paper is stressed uniformly when being stretched (115 micrometers is in the clamping range of a stretching clamp, and can be clamped by a common clamp); and stretching the sandwiched kraft paper to a certain degree, gradually forming the hexagonal honeycomb units until plastic deformation is generated, and obtaining the hexagonal honeycomb unit-shaped kraft paper honeycomb structure with the unit side length of about 6 mm after the hexagonal honeycomb units are relatively stable, as shown in the attached figure 3.
Example 2:
example 2 of the present invention is a stainless steel ultra-thin strip metal honeycomb based on a paper-cut structure, which is rapidly formed by the method (the shape of the metal honeycomb is hexagonal, but the distance between the cuts is small (2 mm), so that the upper and lower sides of the formed hexagon are small (2 mm) and look like a quadrangle).
The steps of this example are as follows:
the method comprises the following steps: taking a stainless steel ultrathin strip with the thickness of 300 micrometers, the width of 120mm and the length of 200 mm;
step two: the surface of the paper-cut is processed by cutting (the cutting method used in the embodiment 2 is chemical etching, the effect is excellent), and the parameters of the paper-cut segment are respectively as follows: the length of the notch is 16 mm, the width of the notch is 0.3 mm, two ends of the notch are rounded, the radius of the rounded angle is 0.15 mm, the distance between the notches is 2mm, the longitudinal line distance is 3 mm, the number of the notch lines is 21, the adjacent lines are arranged in a staggered manner, and the notch gap is opposite to the center of the notch of the adjacent line;
step three: clamping the upper end and the lower end of the processed stainless steel ultra-thin strip by using a specific clamp so as to enable the stainless steel ultra-thin strip to be stressed uniformly during stretching; and then placing the clamped stainless steel ultra-thin strip and the clamp thereof on a stretching machine to stretch to a certain degree, so that the stainless steel ultra-thin strip is subjected to plastic deformation, and thus the metal honeycomb structure with the thin-wall material being the stainless steel ultra-thin strip is obtained, as shown in figure 4.
The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.
Claims (6)
1. A curved surface metal honeycomb rapid forming method based on a paper-cut structure is characterized in that: the method comprises the following steps:
the method comprises the following steps: according to the outline dimension of the required honeycomb structure, taking a thin-wall material with the length and width dimension of L multiplied by W and the thickness t far smaller than the length L and the width W;
step two: according to the shape and size of the honeycomb unit required by the honeycomb structure in the step one, processing a plurality of paper-cut-shaped cuts on the thin-wall material, wherein the paper-cut-shaped cuts penetrate through the front end face and the rear end face of the thin-wall material;
step three: and (3) uniformly stretching and unfolding the thin-wall material treated in the step two along the direction vertical to the paper-cut-shaped cuts by adopting a stretcher and a clamp to form a honeycomb structure consisting of hexagonal honeycomb units.
2. The method for quickly forming the curved-surface metal honeycomb based on the paper-cut structure according to claim 1, wherein the method comprises the following steps: the paper-cut notches in the second step are distributed on the thin-wall material in a parallel and staggered mode, the distance between every two paper-cut notches in the same row is b, the length of each notch of each paper-cut notch is a, and the row distance of the paper-cut notches in adjacent rows is h.
3. The method for quickly forming the curved-surface metal honeycomb based on the paper-cut structure according to claim 2, characterized in that: in the third step, a metal honeycomb consisting of hexagonal honeycomb units with side lengths of b and 1/2 (a-b) is formed.
4. The method for quickly forming the curved-surface metal honeycomb based on the paper-cut structure according to any one of claims 1 to 3, wherein the method comprises the following steps: and in the second step, the paper-cut-shaped notch is prepared by die cutting, laser cutting, linear cutting or chemical etching.
5. The method for quickly forming the curved-surface metal honeycomb based on the paper-cut structure according to any one of claims 1 to 3, wherein the method comprises the following steps: the thin-wall material comprises a metal material, a glass fiber fabric impregnated with resin, aromatic fiber paper, kraft paper, graphite fiber and Kevlar fiber.
6. The method for quickly forming the curved-surface metal honeycomb based on the paper-cut structure according to claim 1, wherein the method comprises the following steps: the honeycomb structure manufactured by the method is suitable for plane, curved surface and multi-dimensional solid surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210685346.4A CN114770055A (en) | 2022-06-17 | 2022-06-17 | Curved surface metal honeycomb rapid forming method based on paper-cut structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210685346.4A CN114770055A (en) | 2022-06-17 | 2022-06-17 | Curved surface metal honeycomb rapid forming method based on paper-cut structure |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05309767A (en) * | 1992-05-08 | 1993-11-22 | Showa Aircraft Ind Co Ltd | Manufacture of honeycomb core |
| CN202115922U (en) * | 2011-03-31 | 2012-01-18 | 王新钢 | Novel insulation explosion-proof filling material |
| CN203064557U (en) * | 2013-02-04 | 2013-07-17 | 王学彬 | Three-dimensional honeycomb-like aluminum alloy blocking anti-explosion sheet |
| CN103612433A (en) * | 2013-09-29 | 2014-03-05 | 魏玲 | Metal honeycomb material used in aerospace and aircraft separation layer, and preparation method thereof |
| CN105478562A (en) * | 2015-12-31 | 2016-04-13 | 深圳市乾行达科技有限公司 | Stretching device and stretching method of metal honeycomb molding |
| CN108817638A (en) * | 2018-07-25 | 2018-11-16 | 青岛归来科技有限公司 | The preparation method of metal beehive core material and metal honeycomb plate |
| CN108859281A (en) * | 2018-05-22 | 2018-11-23 | 西安威信科技有限责任公司 | A kind of manufacturing method of honeycomb core material |
| CN109878897A (en) * | 2019-04-23 | 2019-06-14 | 杨介思 | Environmental protection buffering is packaged paper or Honey comb like package paper or netted brown paper |
| CN113775682A (en) * | 2021-11-12 | 2021-12-10 | 太原理工大学 | Adjustable circular tube energy absorption/storage mechanism based on paper-cut structure |
-
2022
- 2022-06-17 CN CN202210685346.4A patent/CN114770055A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05309767A (en) * | 1992-05-08 | 1993-11-22 | Showa Aircraft Ind Co Ltd | Manufacture of honeycomb core |
| CN202115922U (en) * | 2011-03-31 | 2012-01-18 | 王新钢 | Novel insulation explosion-proof filling material |
| CN203064557U (en) * | 2013-02-04 | 2013-07-17 | 王学彬 | Three-dimensional honeycomb-like aluminum alloy blocking anti-explosion sheet |
| CN103612433A (en) * | 2013-09-29 | 2014-03-05 | 魏玲 | Metal honeycomb material used in aerospace and aircraft separation layer, and preparation method thereof |
| CN105478562A (en) * | 2015-12-31 | 2016-04-13 | 深圳市乾行达科技有限公司 | Stretching device and stretching method of metal honeycomb molding |
| CN108859281A (en) * | 2018-05-22 | 2018-11-23 | 西安威信科技有限责任公司 | A kind of manufacturing method of honeycomb core material |
| CN108817638A (en) * | 2018-07-25 | 2018-11-16 | 青岛归来科技有限公司 | The preparation method of metal beehive core material and metal honeycomb plate |
| CN109878897A (en) * | 2019-04-23 | 2019-06-14 | 杨介思 | Environmental protection buffering is packaged paper or Honey comb like package paper or netted brown paper |
| CN113775682A (en) * | 2021-11-12 | 2021-12-10 | 太原理工大学 | Adjustable circular tube energy absorption/storage mechanism based on paper-cut structure |
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