JP4774698B2 - Aluminum honeycomb core manufacturing method and apparatus, and foil thickness control method for aluminum honeycomb core - Google Patents

Description

  The present invention relates to an aluminum honeycomb core manufacturing method and apparatus, and an aluminum honeycomb core foil thickness control method. More specifically, the foil thickness in the longitudinal direction of the aluminum honeycomb core is uniformly reduced, and the entire surface of the aluminum honeycomb core is etched. The present invention relates to a method and apparatus for manufacturing an aluminum honeycomb core that can have the same buckling strength, and a method for controlling the foil thickness of the aluminum honeycomb core.

  In general, a hexagonal columnar aluminum honeycomb core has a volume ratio of 95% to 99% for the space layer (air layer) and 5% to 1% for the core material. It is easy, has a high degree of design freedom, and can be manufactured at low cost.

  Accordingly, a honeycomb core block formed by combining a plurality of aluminum honeycomb cores into a block shape is used in various fields such as vehicle impact test materials and impact absorbing materials, building materials, floor panels, containers, and the like ( For example, see Patent Document 1).

  By the way, when the aluminum honeycomb core as described above is used as an impact test material or an impact absorber for a vehicle, the buckling strength does not change with respect to the impact load when the foil thickness is uniform. A configuration in which the foil thickness is sequentially changed with respect to the direction and the volume ratio is also proposed.

  For example, as a method for sequentially changing the foil thickness with respect to the longitudinal direction of the aluminum honeycomb core, a method is known in which the aluminum honeycomb core is sequentially immersed in an etching solution and the foil thickness is processed by etching. However, in the conventional etching method, as shown in FIGS. 14A to 14D, the aluminum honeycomb core W is immersed in the etching solution 2 in the etching tank 1 step by step at regular intervals. Since the foil thickness h of the etched aluminum honeycomb core W is stepped as shown in FIG. 15, the foil thickness ha is sequentially changed with respect to the longitudinal direction of the aluminum honeycomb core W. The buckling strength also changed step by step, and the buckling strength could not be changed smoothly (linearly).

  The cause of this is that when the aluminum honeycomb core W is etched in the etching solution 2, the temperature of the solution rises due to a chemical reaction between the etching solution 2 and aluminum, and the etching reaction increases as the temperature rises. Is known. For this reason, when the aluminum honeycomb core W having a large volume is immersed in the etching solution 2 in advance, the contact area of the aluminum honeycomb core W with respect to the etching solution 2 also increases, and as a result, the temperature rise of the etching solution 2 also increases. Since the etching reaction becomes large, it is understood that when the aluminum honeycomb core W is immersed in the etching solution 2 in a stepwise manner, the foil thickness h in the longitudinal direction of the aluminum honeycomb core W changes stepwise. It was.

Further, in the conventional etching method of the aluminum honeycomb core W, since the aluminum honeycomb core W is immersed in the static etching solution 2, a difference in foil thickness occurs between the outside and inside of the aluminum honeycomb core W. and which, therefore variation in buckling strength due longitudinal location of the aluminum honeycomb core W is generated, there is a problem that the can not be obtained a stable buckling capacity.

  This invention was devised by paying attention to such conventional problems, and when etching an aluminum honeycomb core, the foil thickness can be uniformly processed along the longitudinal direction, It is an object of the present invention to provide an aluminum honeycomb core manufacturing method and apparatus, and an aluminum honeycomb core foil thickness control method capable of reducing the variation in buckling strength and obtaining stable buckling performance.

The present invention, in order to achieve the above object, a manufacturing method of an aluminum honeycomb core of this invention is to convection horizontally etching solution to the liquid surface, the etching solution tank is tilted bottom wall surface on one aluminum The honeycomb core is continuously dipped for a predetermined time while being lowered from the front end side to the rear end side. During the dipping process of the aluminum honeycomb core, the etching solution is applied to the aluminum honeycomb core from the spray nozzle at a predetermined pressure. The foil is controlled so that the foil thickness increases from the front end side to the rear end side of the aluminum honeycomb core, and then the aluminum honeycomb core is transferred to a cleaning treatment tank for cleaning, and then the cleaned aluminum honeycomb core is dipped a manufacturing method of an aluminum honeycomb core be manufactured by dipping in and transferred to a processing tank, during the immersion step of the aluminum honeycomb core, the aluminum When the etching solution is sprayed onto the Nicam core at a predetermined pressure by the spray nozzle, the etching solution is sprayed by a plurality of spray nozzles set at arbitrary spray angles by varying the spray angle corresponding to the location of the aluminum honeycomb core. This is the gist.

Here, when etching the A Rumi honeycomb core, it is performed taking into buckets.

  Further, in the manufacturing process of the aluminum honeycomb core, the bucket containing the aluminum honeycomb core is continuously performed by a transport device that can move up and down, and an alkaline solution (for example, sodium hydroxide solution) is used as the etching solution. To do.

In addition, the aluminum honeycomb core manufacturing apparatus of the present invention includes an etching solution tank in which the bottom wall surface containing the etching solution is inclined on one side on the work table, a cleaning treatment tank for cleaning the etched aluminum honeycomb core, A dip treatment tank for dipping the cleaned aluminum honeycomb core is installed horizontally and in series, and a bucket containing the aluminum honeycomb core is held between the etching solution tank, the cleaning treatment tank, and the dip treatment tank. A transfer device that can be moved up and down and transported, and in the etching solution tank, convection means for convection of the etching solution in the horizontal direction with respect to the liquid surface, and the etching solution corresponding to the location of the aluminum honeycomb core. The gist of the invention is to provide a plurality of injection nozzles that are set to be capable of injection at an arbitrary injection angle with different injection angles.

  Here, the transfer device is provided with clamp means that holds the bucket containing the aluminum honeycomb core and can be moved up and down on the guide rail installed above the etching solution tank, the cleaning treatment tank, and the dipping tank. Is.

Further, the foil thickness control method for an aluminum honeycomb core according to the present invention is such that the aluminum honeycomb core is continuously immersed in an etching solution tank in which the etching solution is convected in a horizontal direction with respect to the liquid surface and the bottom wall surface is inclined to one side. And controlling the foil thickness in the longitudinal direction of the aluminum honeycomb core to control the foil thickness of the aluminum honeycomb core, wherein the aluminum honeycomb core is used as an etching solution tank for a predetermined time from the front end side to the rear end side of the aluminum honeycomb core. During this aluminum honeycomb core dipping process, etching is performed at a predetermined pressure by a plurality of injection nozzles set at arbitrary injection angles with different injection angles corresponding to the location of the aluminum honeycomb core. When etching by spraying the solution, the foil thickness is controlled while controlling the immersion speed from the front end side to the rear end side of the aluminum honeycomb core. It is an gist of Rukoto.

  Here, when the aluminum honeycomb core is immersed in an etching solution tank, the etching solution is convected in a horizontal direction with respect to the liquid surface, and when the etching solution is sprayed onto the aluminum honeycomb core at a predetermined pressure, The angle of the spray nozzle is changed depending on the location. An alkaline solution is used as the etching solution.

Since the present invention is configured as described above, the following excellent effects can be obtained. (A). When the aluminum honeycomb core is etched, the thickness of the foil can be uniformly processed along the longitudinal direction.
(B). The variation in buckling strength can be reduced, and stable buckling performance can be obtained.
(C). Since the etching time of the aluminum honeycomb core can be shortened, productivity can be improved.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Note that the same components as those in the conventional example are denoted by the same reference numerals and description thereof is omitted.

1 is a schematic front view of an apparatus for manufacturing an aluminum honeycomb core W for carrying out the method for manufacturing an aluminum honeycomb core of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a side view of FIG. This aluminum honeycomb core W manufacturing apparatus has a certain period of time from the front end side to the rear end side of the aluminum honeycomb core W housed in the wire mesh-like bucket 3 in the etching solution 2 (for example, alkaline solution: sodium hydroxide solution). An etching solution tank 1 for controlling the foil thickness h of the aluminum honeycomb core W while being continuously immersed in water, a cleaning treatment tank 4 for cleaning the etched aluminum honeycomb core W with water, and the cleaned aluminum honeycomb core W with water. a de I-up processing tank 5 to de-I-up process is placed in series horizontally on working platform 6 by like. The temperature of the etching solution 2 in the etching solution tank 1 is preferably 20 to 70 degrees.

  Between the etching solution tank 1, the cleaning treatment tank 4, and the dipping treatment tank 5, an elevating and moving transfer device 7 that holds and transfers the bucket 3 containing the aluminum honeycomb core W is installed, The transfer device 7 is attached to a guide rail 8 installed above the etching solution tank 1, the cleaning treatment tank 4, and the dipping treatment tank 5 so as to be reciprocally movable. Clamp means 10 is attached to hold the bucket 3 that moves up and down.

  In the etching solution tank 1, as shown in FIGS. 4 to 6, convection means 11 for convection the etching solution 2 in the horizontal direction with respect to the liquid surface, and the etching solution 2 with respect to the aluminum honeycomb core W A plurality of injection nozzles 12 that can be injected at an angle are provided. 4 to 6, the convection means 11 is formed by inclining the bottom wall surface 1a of the etching solution tank 1, and the etching solution 2 overflowing from the etching solution tank 1 is supplied to the circulation pump 13 and the circulation path. The etching solution 2 is circulated in a horizontal direction with respect to the liquid level by circulating through the nozzle 14, and the spray nozzle 12 for the etching solution 2 is further provided at a predetermined interval in a pipe 15 disposed in the lower part of the etching solution tank 1. A plurality of nozzles 12 are attached.

  The tip of the nozzle 12 is configured such that the angle can be adjusted in an arbitrary direction, and the etching solution 2 supplied from the supply pump can be sprayed onto the inner and outer surfaces of the aluminum honeycomb core W at a predetermined flow rate.

  Opening and closing lids 19a and 19b that open and close around fulcrums 18a and 18b are attached to the upper opening of the etching solution tank 1 through a pair of opening and closing cylinders 17a and 17b attached to the side surfaces of the etching solution tank 1. When the aluminum honeycomb core W is etched, and when the aluminum honeycomb core W is inserted and removed, the upper opening of the etching solution tank 1 is opened and closed. Reference numeral 20 denotes a string-like member such as a rubber band that can withstand the etching solution 2 for fixing a plurality of aluminum honeycomb cores W accommodated in the bucket 3, and 20a is formed on the etching solution tank 1. It is an installed exhaust duct device.

  As shown in FIGS. 7 to 9, a plurality of water injection nozzles 21 are disposed above the cleaning treatment tank 4 to inject water into the aluminum honeycomb core W that has been conveyed and clean it. The spray nozzle 21 is attached to a cleaning water pipe 22 disposed at an upper portion of the cleaning treatment tank 4 at a predetermined interval, and the pipe 22 is connected to a cleaning water drive pump (not shown).

  Opening and closing lids 26a and 26b that open and close around fulcrums 25a and 25b via a pair of opening and closing cylinders 24a and 24b are attached to the upper opening of the cleaning treatment tank 4 as well as the etching solution tank 1. ing.

Furthermore, the de-I-up processing tank 5, the surface of the aluminum honeycomb core W de I-up process with water by dipping in an aluminum honeycomb core W water tank 27 that has been cleaned, as shown in FIGS. 1 to 3 what is, the upper opening of the de I-up processing tank 5, close lid for opening and closing through a pair of opening and closing cylinders in the same manner as the etching solution tank 1 and the cleaning tank 4 is mounted.

Next, a method for manufacturing the aluminum honeycomb core will be described.
In the manufacturing method of the present invention, first, the etching solution 2 such as sodium hydroxide solution placed in the etching solution tank 1 is accommodated in the bucket 3 while being convected in a horizontal direction with respect to the liquid level via the convection means 11. a plurality of aluminum honeycomb core W that, as shown in FIG. 10, with its bucket 3 by the transfer device 7, while continuously immersed in a predetermined time toward the rear end side from the front end side of the aluminum honeycomb core W, In addition, the etching solution 2 is sprayed onto the aluminum honeycomb core W by the spray nozzle 12 at a predetermined pressure, and the foil thickness h is controlled by etching in a taper shape so as to be the foil thickness h1 as shown in FIG.

Then, the etched aluminum honeycomb core W, washed with water and transferred to the cleaning tank 4 by a conveying device 7, de I-up processing tank 5 The washed aluminum honeycomb core W by the transfer device 7 is intended to be produced by de I-up process is transferred to. Wherein the etching solution tank 1, when the etching solution 2 is injected into the aluminum honeycomb core W etching as described above, an aluminum honeycomb core W by a plurality of injection nozzles 12 set at an arbitrary injection angle at different injection angle The inner and outer surfaces of the aluminum honeycomb core W can be uniformly etched by spraying the etching solution in correspondence with the spray locations.

Specifically, while immersing the aluminum honeycomb core W in the etching solution tank 1, when the etching solution 2 is injected at a predetermined pressure in an aluminum honeycomb core W is etched, the end rear from the front end side of the aluminum honeycomb core W The foil thickness h can be controlled by continuously dipping while controlling the dipping rate toward the side.

In particular, in this invention, by which continuously immersed in a predetermined time toward the rear end side from the front end side of the aluminum honeycomb core W, the etching solution 2 is the reaction rate (temperature rise) can also be suppressed, and the etching solution 2 since the suspension became a homogeneous density by causing convection, further uniformly spray the etching solution 2 while arbitrarily adjusting the injection angle of the injection nozzle 12 to the inner and outer surfaces of the aluminum honeycomb core W, end the rear from the front end side of the aluminum honeycomb core W It is possible to perform etching with a uniform foil thickness h toward the side.

  As described above, when the aluminum honeycomb core W is etched, the thickness of the foil thickness h can be uniformly processed along the longitudinal direction because the etching is continuously performed by the method as described above. Therefore, when such an aluminum honeycomb core W is used as a vehicle impact test material or shock absorbing material, variations in buckling strength can be reduced and stable buckling performance can be obtained. Moreover, since the etching time of the aluminum honeycomb core W can be shortened, productivity can be improved.

  12 and 13 are graph explanatory views showing the relationship between the load and displacement of the aluminum honeycomb core W of the present invention and the conventional aluminum honeycomb core W, and the aluminum honeycomb core W of the present invention (FIG. 12). ) And the conventional aluminum honeycomb core W are clear.

1 is a schematic front view of an apparatus for manufacturing an aluminum honeycomb core W for carrying out an aluminum honeycomb core manufacturing method of the present invention. It is a top view of FIG. It is a side view of FIG. It is a front view of an etching solution tank. FIG. 5 is a plan view of FIG. 4. FIG. 5 is a side view of FIG. 4. It is a front view of a washing processing tank. FIG. 8 is a plan view of FIG. 7. FIG. 8 is a side view of FIG. 7. (A)-(d) is explanatory drawing of the manufacturing process of the aluminum honeycomb core of this invention. It is a side view of an aluminum honeycomb core whose foil thickness is controlled by the manufacturing method of the present invention. It is graph explanatory drawing which shows the relationship between the load and displacement of the aluminum honeycomb core of this invention. It is graph explanatory drawing which shows the relationship between the load and displacement of the conventional aluminum honeycomb core. (A)-(d) is explanatory drawing of the manufacturing process of the conventional aluminum honeycomb core. It is a side view of an aluminum honeycomb core whose foil thickness is controlled by a conventional manufacturing method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Etching tank 2 Etching solution 1a Bottom face of etching tank W Aluminum honeycomb core h, h1, ha Foil thickness 3 Bucket 4 Cleaning treatment tank 5 Depth treatment tank 7 Conveying device 8 Guide rail 9 Guide rail 10 Clamping means 11 Convection means 12 Injection nozzle DESCRIPTION OF SYMBOLS 13 Circulation pump 14 Circulation path 15 Piping 17a, 17b Opening and closing cylinder 18a, 18b Supporting point 19a, 19b Opening / closing lid 20 String member 20a Exhaust duct device 21 Water injection nozzle 22 Piping 23 Drive pump
24a, 24b Open / close cylinder 25a, 25b Support point 26a, 26b Open / close lid 27 Water tank

Claims (10)

Dipping continuously in a certain time while descending from the front end side of the aluminum honeycomb core to the rear end side in an etching solution tank in which the etching solution is convected in a horizontal direction with respect to the liquid level and the bottom wall surface is inclined to one side. During the dipping process of the aluminum honeycomb core, the etching solution is sprayed from the spray nozzle to the aluminum honeycomb core at a predetermined pressure so that the foil thickness increases from the front end side to the rear end side of the aluminum honeycomb core. Then, after the aluminum honeycomb core is transferred to the cleaning tank and cleaned, the cleaned aluminum honeycomb core is transferred to the dip tank and manufactured by dip processing,
During the immersion step of the aluminum honeycomb core, when to inject at a predetermined pressure etching solution by the injection nozzle with respect to the aluminum honeycomb core, at different injection angle so as to correspond to the location of the aluminum honeycomb core of any injection angle A method for manufacturing an aluminum honeycomb core, wherein an etching solution is sprayed by a plurality of spray nozzles set in step 1.   The method for manufacturing an aluminum honeycomb core according to claim 1, wherein the aluminum honeycomb core is etched in a bucket.   3. The aluminum honeycomb core is subjected to an etching process by immersing the aluminum honeycomb core in an etching solution tank while continuously moving the bucket containing the aluminum honeycomb core by a transporting device capable of moving up and down and moving the aluminum honeycomb core. The manufacturing method of the aluminum honeycomb core of description.   4. The method for manufacturing an aluminum honeycomb core according to claim 1, wherein an alkaline solution is used as the etching solution. An etching solution tank in which the bottom wall surface containing the etching solution is inclined to one side on the work table, a cleaning processing tank for cleaning the etched aluminum honeycomb core, and a dip processing tank for dip processing the cleaned aluminum honeycomb core Are moved in a horizontal and series manner, and a transfer device that can move up and down and move while holding and transferring a bucket containing an aluminum honeycomb core between the etching solution tank, the cleaning treatment tank, and the dip treatment tank. Installed in the etching solution tank, convection means for convection of the etching solution in the horizontal direction with respect to the liquid surface, and the etching solution is sprayed at an arbitrary spraying angle corresponding to the location of the aluminum honeycomb core. An apparatus for manufacturing an aluminum honeycomb core, comprising: a plurality of spray nozzles set in a possible manner.   The said conveying apparatus provided the clamp means which hold | maintains the bucket which accommodated the aluminum honeycomb core in the guide rail installed above the etching solution tank, the cooling processing tank, and the dip processing tank, and can raise / lower. An apparatus for manufacturing an aluminum honeycomb core according to 1. Aluminum for controlling the foil thickness in the longitudinal direction of the aluminum honeycomb core by continuously immersing the aluminum honeycomb core in an etching solution tank in which the etching solution is convected in the horizontal direction with respect to the liquid surface and the bottom wall surface is inclined to one side. A method for controlling the thickness of a honeycomb core foil,
The aluminum honeycomb core is continuously immersed in the etching solution tank from the front end side to the rear end side of the aluminum honeycomb core for a predetermined time, and the aluminum honeycomb core is made to correspond to the location of the aluminum honeycomb core during the dipping process of the aluminum honeycomb core. When etching is performed by spraying the etching solution at a predetermined pressure with multiple spray nozzles set at any spray angle with different spray angles, the immersion speed is controlled from the front end side to the rear end side of the aluminum honeycomb core. A method for controlling the foil thickness of the aluminum honeycomb core while controlling the foil thickness.   The method for controlling the foil thickness of an aluminum honeycomb core according to claim 7, wherein when the aluminum honeycomb core is immersed in an etching solution tank, the etching solution is convected in a horizontal direction with respect to the liquid surface.   9. The spray according to claim 7, wherein when the etching solution is sprayed onto the aluminum honeycomb core at a predetermined pressure, the plurality of spray nozzles having different spray angles are sprayed at a predetermined pressure corresponding to the location of the aluminum honeycomb core. Foil thickness control method for aluminum honeycomb core.   10. The foil thickness control method for an aluminum honeycomb core according to claim 7, 8 or 9, wherein an alkaline solution is used as the etching solution.

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