JP7089940B2 - Metal surface fastener, manufacturing method, manufacturing equipment, metal surface joining method - Google Patents

Description

The present invention relates to a metal surface fastener, a method for manufacturing the same, a manufacturing apparatus, and a method for joining a metal surface.

Conventionally, various proposals have been made in which the surface fastener is made of metal for the purpose of improving the bonding strength in the bonding technique using the surface fastener (see, for example, Patent Document 1 and Non-Patent Document 1). However, since the metal surface fastener is made of metal, it is difficult to process the unevenness, and there is a problem that the manufacturing cost is higher than that of a general surface fastener made of plastic or the like. Further, as the size of each unevenness increases (for example, on the order of several mm to several cm), there is a problem that the degree of freedom of the joining position depending on the pitch of the unevenness becomes small.

In order to solve such a problem, the present inventor has already proposed a technique as shown in Patent Document 3. As shown in FIG. 7, in this technique, fine uneven portions 4 are formed on the surface 3 of a pair of hook-and-loop fasteners 2 made of a metal substrate 1 by laser scanning processing, and between the uneven metal surfaces 3. A soft metal foil 5 such as an aluminum foil is sandwiched and crimped to be surface-bonded. According to this, the uneven shape can be easily and inexpensively formed on the metal surface by the laser scanning process. Further, since the uneven size can be reduced, a metal surface fastener having a high degree of freedom in the joining position can be realized.

Japanese Unexamined Patent Publication No. 2015-21254 Japanese Patent No. 5816763 Japanese Patent Application No. 2018-011624 (Unpublished at this time)

Gizmodo Japan homepage, "Steel magic tape (registered trademark)", [online], [Search on December 1, 2017], Internet <URL: https://www.gizmodo.jp/2009/09 /post_6093.html ＞

In the metal surface joining technique as shown in Patent Document 3, a technique capable of ensuring high joining strength with a lower crimping load has been desired.

The present invention has been made in view of the above, and provides a metal hook-and-loop fastener, a manufacturing method, a manufacturing apparatus, and a metal surface joining method capable of ensuring high joining strength with a lower crimping load. With the goal.

In order to solve the above-mentioned problems and achieve the object, the metal surface fastener according to the present invention includes a surface fastener having a plurality of engaging elements on the surface of a metal substrate and a surface fastener of the metal substrate. A metal surface fastener configured to surface-bond a surface fastener provided with an engaging layer to each other by engaging the engaging element and the engaging layer, and the plurality of engaging elements are based on the base. The surface of the material is formed into a fine uneven shape by laser processing, and the engaging layer is characterized by being made of a metal film softer than the engaging element.

Further, another metal surface fastener according to the present invention is characterized in that, in the above-mentioned invention, the engaging layer is formed by thermal spraying of a metal onto the surface of a base material.

Further, another metal surface fastener according to the present invention is characterized in that, in the above-mentioned invention, the engaging layer has a thickness capable of ensuring the fitting of the convex portion of the engaging element into the engaging layer. ..

Further, the method for manufacturing a metal surface fastener according to the present invention is the above-mentioned method for manufacturing a metal surface fastener, which has a plurality of fine uneven shapes on the surface of the base material by laser processing on the surface of the base material. It is characterized by having a step of forming an engaging element of the above, and a step of forming an engaging layer made of a metal film softer than the engaging element on the surface of the base material by spraying a metal onto the surface of the base material. ..

Further, the metal surface fastener manufacturing apparatus according to the present invention is an apparatus for manufacturing the above-mentioned metal surface fastener, and has a plurality of fine uneven shapes on the surface of the base material by laser processing on the surface of the base material. It is characterized by having a means for forming an engaging element of the above, and a means for forming an engaging layer made of a metal film softer than the engaging element on the surface of the base material by spraying a metal onto the surface of the base material. ..

Further, the method for joining metal surfaces according to the present invention is a method for joining metal surfaces to each other by using the above-mentioned metal surface fastener, and is a surface fastener provided with a plurality of engaging elements on the surface of a metal base material. It is characterized by having a step of surface-bonding a surface fastener having an engaging layer on the surface of a metal base material by crimp-engaging the engaging element and the engaging layer with each other.

Further, another method for joining a metal surface according to the present invention is characterized in that, in the above-described invention, the engaging layer is heated when the engaging element and the engaging layer are crimp-engaged.

According to the metal surface fastener according to the present invention, a surface fastener having a plurality of engaging elements on the surface of a metal base material and a surface fastener having an engaging layer on the surface of a metal base material can be used with each other. It is a metal surface fastener configured to be surface-bonded by engaging the engaging element and the engaging layer of the above, and the plurality of engaging elements are formed into fine uneven shapes by laser processing on the surface of the base material. Since the engaging layer is formed of a metal film that is softer than the engaging element, it is possible to provide a metal hook-and-loop fastener that can secure high bonding strength with a lower crimping load. It works.

Further, according to another metal surface fastener according to the present invention, since the engaging layer is formed by thermal spraying of the metal on the surface of the base material, there is an effect that the bonding strength can be improved.

Further, according to another metal surface fastener according to the present invention, the engaging layer has a thickness capable of ensuring the fitting of the convex portion of the engaging element into the engaging layer, and thus engages with the engaging element. It has the effect of making the engagement of the layers more reliable and improving the bonding strength.

Further, according to the method for manufacturing a metal surface fastener according to the present invention, the above-mentioned method for manufacturing a metal surface fastener is obtained from a fine uneven shape on the surface of the base material by laser processing on the surface of the base material. Since it has a step of forming a plurality of engaging elements and a step of forming an engaging layer made of a metal film softer than the engaging element on the surface of the base material by spraying the metal onto the surface of the base material, the metal is formed. It has the effect that the surface fastener can be manufactured easily and inexpensively.

Further, according to the device for manufacturing a metal surface fastener according to the present invention, it is an apparatus for manufacturing the above-mentioned metal surface fastener, and the surface of the base material is subjected to laser processing from a fine uneven shape on the surface of the base material. Since it has a means for forming a plurality of engaging elements and a means for forming an engaging layer made of a metal film softer than the engaging element on the surface of the base material by spraying the metal onto the surface of the base material, the metal is formed. It has the effect that the surface fastener can be manufactured easily and inexpensively.

Further, according to the method for joining metal surfaces according to the present invention, it is a method for joining metal surfaces to each other by using the above-mentioned metal surface fastener, and a plurality of engaging elements are provided on the surface of a metal base material. Since the surface fastener has a step of surface-bonding the surface fastener having an engaging layer on the surface of the metal base material by crimping and engaging the engaging element and the engaging layer with each other, the metal surfaces are joined to each other. Has the effect of being able to firmly join.

Further, according to another method for joining a metal surface according to the present invention, the engaging layer is heated when the engaging element and the engaging layer are crimp-engaged, so that the engaging layer is easily plasticized. It has the effect of further improving the bonding strength.

FIG. 1 is a schematic view showing an embodiment of a metal surface fastener and a metal surface joining method according to the present invention. FIG. 2 is a detailed perspective view of the uneven portion of the metal surface. FIG. 3 is a detailed cross-sectional view of a soft metal film on a metal surface. 4A and 4B are photographic views showing a state in which a metal surface fastener according to the present invention is joined by a method of joining metal surfaces, FIG. 4 is a front view, and FIG. 4 is a perspective view. 5A and 5B are photographic views showing the test piece, where (1) is the appearance of the test piece, (2) is the surface of an uneven steel plate, and (3) is an aluminum sprayed coating. FIG. 6 is a photographic diagram showing a test situation. FIG. 7 is a schematic view showing a metal surface fastener of Patent Document 3.

Hereinafter, embodiments of the metal surface fastener, the manufacturing method, the manufacturing apparatus, and the metal surface joining method according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

[Metallic hook-and-loop fastener and its manufacturing method]
First, an embodiment of a metal surface fastener and a method for manufacturing the same according to the present invention will be described.

As shown in FIG. 1, the metal surface fastener 100 according to the present embodiment includes a surface fastener 16 having a plurality of engaging elements 14 on the surface 12 of the metal base material 10 and a metal base material 10. The surface fastener 20 having the engaging layer 18 on the surface 12 is configured to be surface-bonded by crimp-engaging the engaging element 14 and the engaging layer 18 with each other. As the base material 10, a metal material such as a steel material can be used.

The plurality of engaging elements 14 are formed into a fine uneven shape by laser scanning processing on the surface 12 of the base material 10 (hereinafter, may be referred to as a metal surface). Hereinafter, this uneven shape may be referred to as an uneven portion.

When the hook-and-loop fastener 16 is manufactured, the uneven portion 22 having an uneven shape is formed on the metal surface 12 by laser scanning processing. An example of the formed uneven portion 22 is shown in FIG. By irradiating the laser in a grid pattern, a plurality of grooves (recesses 26) are formed on the metal surface at predetermined intervals, thereby forming the uneven portion 22.

The size of the uneven portion 22 is determined by the capacity of the laser processing machine, but in the present embodiment, as shown in FIG. 2, convex portions having a height of about 100 μm are formed at a pitch of 100 μm as well. According to the uneven portion 22, the degree of freedom of the joining position can be realized at a pitch of 100 μm. As long as the convex portion 24 has a height of about 20 to 100 μm, a processing method such as blasting may be used. In order to secure the joint strength, an overhanging shape (a shape larger on the upper side) is preferable. Further, burrs are generated when the concave portions 26 are formed, but it is preferable not to remove these burrs. Even if the processing accuracy of the uneven portion 22 is low, the burrs are plasticized and become familiar, and can be joined by becoming a part of the fitting portion.

As a laser scanning processing technique for forming the uneven portion 22 on the metal surface 12, for example, the technique described in Patent Document 2 can be used. In the technique described in Patent Document 2, the joining of a metal material and a resin-based material is targeted, and the uneven portion is used to improve the interfacial airtightness of the metal material and the resin-based material. On the other hand, in the present embodiment, the bonding between metal materials is targeted.

The engaging layer 18 is made of a soft metal film 28 that is softer than the engaging element 14. The soft metal film 28 is formed by spraying the soft metal onto the surface 12 of the base material 10. When the base material 10 is made of steel, a soft metal such as aluminum or a zinc-aluminum alloy can be used as the soft metal.

When the hook-and-loop fastener 20 is manufactured, a soft metal is sprayed on the surface 12 of the base material 10 to form a soft metal film 28. It is preferable that the thermal spray thickness is set to be equal to or higher than the height of the convex portion 24 and the state in which the convex portion 24 is fitted into the soft metal film 28 is ensured. By doing so, the engagement between the uneven portion 22 and the soft metal film 28 can be made more reliable, and the bonding strength can be improved. In the present embodiment, as shown in FIG. 3, a zinc aluminum alloy is sprayed on the surface 12 of the base material 10 to form a soft metal film 28 having a thickness of about 300 μm.

When the uneven portion 22 and the soft metal film 28 are crimp-bonded, heat is applied to the soft metal film 28 to facilitate plasticization, so that the bonding strength can be further improved. The heating temperature does not need to reach the metal melting temperature, and safe work is possible.

If the surface fasteners 16 and 20 manufactured by the above procedure are placed facing each other so that the uneven portion 22 and the soft metal film 28 face each other and are pressure-bonded, a metal surface made of a metal surface fastener as shown in FIG. 4 can be obtained. A joined structure can be obtained.

According to this embodiment, as will be described later, high bonding strength can be ensured with a lower crimping load. In addition, it is highly practical because it can be joined by crimping and heating under normal conditions such as vacuum and ultra-high temperature, which are not special environments. Examples of such a method include a method of heating with an electromagnetic induction type heating device such as an IH heater and performing crimp bonding. The joining work does not require accurate positioning, and the work such as crimping is suitable for robotization. If the uneven portion 22 and the soft metal film 28 are sound, they can be repeatedly joined as many times as necessary. Therefore, this embodiment is highly developable because it can be expected as a detachable joining method and a joining structure.

Further, the uneven shape can be easily and inexpensively formed on the metal surface by the laser scanning process on the metal surface. Since it is possible to reduce the unevenness dimension, it is possible to realize a metal surface fastener having a high degree of freedom in the joining position. Further, it is possible to join without removing burrs generated during processing. Further, since the material of this metal surface fastener is metal, the joining strength is high.

(Verification of the effect of the present invention)
Next, verification of the effect of the present invention will be described.
In this verification, a crimping test was performed on a micro-concave-convex steel sheet and an aluminum sprayed steel sheet to investigate their fitting characteristics. As the micro-concavo-convex steel sheet, a steel sheet having micro-concavo-convex (about 100 μm) formed on the surface by laser scanning was used. As the steel sheet for comparison, a steel sheet without uneven processing was used. As the aluminum sprayed steel sheet, a “High μ Plate” obtained by spraying aluminum with a spraying thickness of about 300 μm was used.

FIG. 5 (1) shows the test piece. The one on the left end of the figure is an aluminum sprayed steel sheet, and the three on the right are micro uneven steel sheets. FIG. 5 (2) shows an enlarged photograph of the surface of the microconcavo-convex steel sheet, and FIG. 5 (3) shows an enlarged photograph of the cross section of the sprayed aluminum steel sheet.

FIG. 6 shows the test status. In this test, a micro uneven steel plate (or unprocessed steel plate) and an aluminum sprayed steel plate are placed in contact with each other on a 500 kN Amsler type plate bar tester, and then the two are crimped with crimp loads of 10 kN, 50 kN, 100 kN, and 490 kN. gone. After that, the crimping load was unloaded, and a microconcavo-convex steel sheet (or unprocessed steel sheet) was applied through the hole in the center of the aluminum sprayed steel sheet to apply a tensile load to the crimping surface, and the tensile strength at that time was confirmed. ..

Table 1 shows the test results. In the table, "with uneven processing" means a micro uneven steel sheet, and "without processing" means an unprocessed steel sheet.

As shown in this table, it can be seen that the micro-concave-convex steel sheet and the aluminum sprayed steel sheet can be joined with a crimping load of a certain level or more. The larger the crimping load, the larger the tensile strength. By crimping with 490 kN, a tensile proof stress of about 3 kN (stress degree of about 3 N / mm ² ) can be obtained. The tensile proof stress / crimping load ratio was about 0.5%. On the other hand, the unprocessed steel sheet and the aluminum sprayed steel sheet were not joined even with a crimping load of 490 kN. Therefore, according to the present invention, a high tensile proof stress (joint strength) can be ensured with a lower crimping load.

[Metallic hook-and-loop fastener manufacturing equipment]
Next, an embodiment of the metal surface fastener manufacturing apparatus according to the present invention will be described.

The metal surface fastener manufacturing apparatus according to the present embodiment is an apparatus for manufacturing the metal surface fastener 100 described above. This device is a means for forming a fine uneven portion 18 (a plurality of engaging elements 14) on the surface 12 by laser scanning processing on the surface 12 of the base material 10, and a soft metal on the surface 12 of the base material 10. It has a means for forming a soft metal film 28 (engagement layer 18) softer than the engagement element 14 on the surface 12 of the base material 10 by thermal spraying.

The means for forming the uneven portion 18 can be configured by using, for example, a laser processing machine. The means for forming the soft metal film 28 can be configured by using, for example, a metal sprayer. Specific examples of the method for manufacturing the metal surface fastener 100 using this device are as described above. Therefore, according to the present embodiment, the metal surface fastener 100 having a small uneven size can be easily and inexpensively manufactured.

[Metal surface joining method]
Next, an embodiment of the metal surface joining method according to the present invention will be described.

The method for joining metal surfaces according to the present embodiment is a method for joining metal surfaces to each other by using the above-mentioned metal surface fastener 100.

As shown in FIG. 1, the hook-and-loop fasteners 16 and 20 are arranged so as to face each other so that the uneven portion 22 and the soft metal film 28 face each other and are crimp-engaged. As a result, the metal surfaces of the surface fasteners 16 and 20 are surface-bonded to each other. According to this method, the metal surfaces can be firmly joined to each other via the uneven portion 22 and the soft metal film 28. Further, even if the processing accuracy of the uneven portion 22 is low, it can be reliably joined. In addition, heat may be applied to the soft metal film 28 at the time of crimping and joining the uneven portion 22 and the soft metal film 28. By doing so, the soft metal film 2 is likely to be plasticized, and the bonding strength can be further improved. The heating temperature does not need to reach the metal melting temperature, and safe work is possible.

As described above, according to the metal surface fastener according to the present invention, a surface fastener having a plurality of engaging elements on the surface of the metal base material and an engaging layer provided on the surface of the metal base material are provided. It is a metal surface fastener configured to surface-bond the surface fastener by engaging the engaging element and the engaging layer with each other, and the plurality of engaging elements are laser-processed on the surface of the base material. Since the engaging layer is made of a metal film that is softer than the engaging element, it is possible to secure high bonding strength with a lower crimping load. Can be provided.

Further, according to another metal surface fastener according to the present invention, since the engaging layer is formed by thermal spraying of a metal onto the surface of the base material, the bonding strength can be improved.

Further, according to another metal surface fastener according to the present invention, the engaging layer has a thickness capable of ensuring the fitting of the convex portion of the engaging element into the engaging layer, and thus engages with the engaging element. The engagement of the layers can be made more reliable and the bonding strength can be improved.

Further, according to the method for manufacturing a metal surface fastener according to the present invention, the above-mentioned method for manufacturing a metal surface fastener is obtained from a fine uneven shape on the surface of the base material by laser processing on the surface of the base material. Since it has a step of forming a plurality of engaging elements and a step of forming an engaging layer made of a metal film softer than the engaging element on the surface of the base material by spraying the metal onto the surface of the base material, the metal is formed. Surface fasteners can be manufactured easily and inexpensively.

Further, according to the device for manufacturing a metal surface fastener according to the present invention, it is an apparatus for manufacturing the above-mentioned metal surface fastener, and the surface of the base material is subjected to laser processing from a fine uneven shape on the surface of the base material. Since it has a means for forming a plurality of engaging elements and a means for forming an engaging layer made of a metal film softer than the engaging element on the surface of the base material by spraying the metal onto the surface of the base material, the metal is formed. Surface fasteners can be manufactured easily and inexpensively.

Further, according to the method for joining metal surfaces according to the present invention, it is a method for joining metal surfaces to each other by using the above-mentioned metal surface fastener, and a plurality of engaging elements are provided on the surface of a metal base material. Since the surface fastener has a step of surface-bonding the surface fastener having an engaging layer on the surface of the metal base material by crimping and engaging the engaging element and the engaging layer with each other, the metal surfaces are joined to each other. Can be firmly joined.

Further, according to another method for joining a metal surface according to the present invention, the engaging layer is heated when the engaging element and the engaging layer are crimp-engaged, so that the engaging layer is easily plasticized. The bonding strength can be further improved.

As described above, the metal hook-and-loop fastener, the manufacturing method, the manufacturing apparatus, and the metal surface joining method according to the present invention are useful for mechanically joining metals to each other, and are particularly high at a lower crimping load. Suitable for ensuring joint strength.

10 Base material 12 Surface, Metal surface 14 Engagement element 16 Hook-and-loop fastener 18 Engagement layer 20 Hook-and-loop fastener 22 Concavo-convex part 24 Convex part 26 Concave part 28 Concave part 28 Soft metal film 100 Metal surface fastener

Claims (7)

A hook-and-loop fastener having a plurality of engaging elements on the surface of a metal base material and a hook-and-loop fastener having an engaging layer on the surface of a metal base material engage with each other. It is a metal surface fastener configured to be surface-bonded by making it.
The plurality of engaging elements are formed into fine uneven shapes by laser processing on the surface of the base material.
The engaging layer is a metal hook-and-loop fastener characterized by being made of a metal film that is softer than the engaging element. The metal surface fastener according to claim 1, wherein the engaging layer is formed by thermal spraying of a metal onto the surface of a base material. The metal surface fastener according to claim 1 or 2, wherein the engaging layer has a thickness capable of ensuring the fitting of the convex portion of the engaging element into the engaging layer. The method for manufacturing a metal surface fastener according to any one of claims 1 to 3.
A step of forming a plurality of engaging elements having fine uneven shapes on the surface of the base material by laser processing on the surface of the base material.
A method for manufacturing a metal surface fastener, which comprises a step of forming an engaging layer made of a metal film softer than an engaging element on the surface of the base material by spraying a metal onto the surface of the base material. An apparatus for manufacturing a metal surface fastener according to any one of claims 1 to 3.
By laser processing on the surface of the base material, a means for forming a plurality of engaging elements having fine uneven shapes on the surface of the base material, and by spraying metal on the surface of the base material, the engaging element is applied to the surface of the base material. A device for manufacturing a metal surface fastener, which also has a means for forming an engaging layer made of a soft metal film. A method of joining metal surfaces to each other using the metal surface fastener according to any one of claims 1 to 3.
A hook-and-loop fastener having a plurality of engaging elements on the surface of a metal base material and a hook-and-loop fastener having an engaging layer on the surface of a metal base material are crimped to each other. A method for joining a metal surface, which comprises a step of surface joining by joining. The method for joining a metal surface according to claim 6, wherein the engaging layer is heated when the engaging element and the engaging layer are crimp-engaged.

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