KR100897868B1 - A metal molding product and molding method thereof - Google Patents

Abstract

The present invention relates to metal moldings and molding methods thereof. In the metal molding according to the embodiment of the present invention, the metal sheet material is expanded to a predetermined shape by compressed air injected into the interspace of the metal plate material formed by the welding part, wherein two or more pieces of the metal plate material are welded to each other. A metal formed product is formed, wherein an edge portion of the metal sheet material protrudes into an inner space of the metal formed product.

Metal plate, air, blow molding, moldings, heating,

Description

Metal moldings and molding method thereof {A METAL MOLDING PRODUCT AND MOLDING METHOD THEREOF}

1 is a perspective view of a metal molding produced by the molding method according to the first embodiment of the present invention,

2 is an enlarged cross-sectional view and a principal part of a state before the sheet metal material is expanded;

3 is a cross-sectional view of a state where the sheet metal material is expanded;

4 is a cross-sectional view of a metal molding according to a second embodiment of the present invention,

5 is a cross-sectional view of a metal molding according to a third embodiment of the present invention.

<Description of Drawing>

100: metal molding 110, 120: metal plate material

112, 122: bent edge portion 130: air injection hole

200: weld

The present invention relates to a metal molding molded using air pressure and a method for producing the same.

Blow molding is a method of molding a three-dimensional object by using air pressure, and is mainly applied to the production of various hollow bottles, containers, tubes, etc., and in recent years, a method of molding a three-dimensional object by using metal plate materials. It is also used.

One conventional method of forming a metal plate material using a blow molding method is disclosed in Korean Patent Application No. 10-2005-0040403.

This application manufactures a three-dimensional molded article by welding the periphery of two sheets of sheet metal material cut into the same shape as one body, injecting compressed air, and expanding the sheet metal material by air pressure.

However, the above-mentioned prior application uses only the air pressure to expand the metal sheet material, so it takes a relatively long time to manufacture the molding.

In addition, the above-described prior application is welding to the upper surface / the lower surface of the metal plate material in the state of overlapping the metal plate material.

However, in order to expand the metal sheet material by air pressure, a thin metal sheet material should be used, and according to the above-mentioned prior application, the welding thickness of the metal sheet material is small, and thus it is not easy to secure welding reliability.

Further, since the portion from the welded portion to the edge portion of the metal plate material is not expanded by air pressure, the expansion range of the metal plate material is small and there is a limit in producing a three-dimensional molded product.

In addition, in order to manufacture a molded article with a beautiful appearance, there is a disadvantage in that a post-processing process of removing an unexpanded portion, that is, a portion of a metal plate material from a welded portion, is required.

The present invention is to solve the above problems, it is possible to shorten the time required for the production of a molding using a metal plate material, the molding method of the metal molding that can produce a three-dimensional molding with a beautiful appearance and manufactured by this method It is an object to provide a molded metal molding.

In order to achieve the above object, in the present invention, two or more pieces of metal sheet material are welded to each other in a welded portion, and the metal sheet material is expanded into a predetermined shape by compressed air injected into the space between the metal sheet materials formed by the welded portion. The metal molding is formed, the inner space of the metal molding is provided with a metal molding protruding the edge of the metal plate material.

The welding part is formed at a bent portion where the metal plate materials are opposed to each other, and the metal plate material may be formed of different thicknesses or different materials.

The metal molding of such a configuration can be produced by a method of forming a metal molding in which the compressed metal is expanded by injecting the compressed air during or after heating the metal sheet material to a predetermined temperature.

At this time, the welding is performed in a state in which the edges of the metal plate material are bent, and the bent portions face each other.

As the metal plate material, a steel plate, a copper plate, a stainless plate, or the like may be used. In the case of the iron plate, a heating temperature of 1000 to 1200 ° C. is used, and in the case of the copper plate, 600 to 600 ° C. A heating temperature of 900 ° C. is used, and a stainless steel plate uses a heating temperature of 1000 to 1300 ° C.

The metal sheet material is locally heated or entirely heated.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

<First Embodiment>

1 is a perspective view of a metal molding produced by the molding method according to the first embodiment of the present invention, Figure 2 is a cross-sectional view of a state before the metal sheet material is expanded, Figure 3 is a cross-sectional view of the metal plate material is expanded state .

The illustrated metal molding 100 is formed in a cushion shape using two metal plate materials 110 and 120.

Each of the two sheet metal materials 110 and 120 is bent at an edge of about 1 cm, and the edge portions 112 and 122 are bent, respectively, and the bent edge portions 112 and 122 are opposed to each other to form the sheet metal materials 110 and 120. It protrudes into the interspace of.

And, the welded portion 200 is formed in the butted portion of the metal plate material (110, 120). The weld part 200 is formed by the general welding method, and is not specifically limited.

In the metal molding 100 having such a configuration, since the edge portions 112 and 122 protrude into the spaces between the metal plate materials 110 and 120, the lengths (about 1 cm) of the edge portions 112 and 122 correspond to each other. The weld 200 may be formed to have a thickness and / or depth. Therefore, the reliability of the welded portion is improved as compared with the prior application.

In addition, since the metal plate materials 110 and 120 of the present embodiment are expanded in the state where the edge portions 112 and 122 are bent, the shape of the metal molding 100 is more three-dimensionally formed than in the prior application, and the edge portion ( A beautiful appearance is formed without post-processing to remove 112, 122).

Hereinafter, the method of shape | molding the metal molding of said structure is demonstrated.

An air injection hole 130 is formed in one sheet of metal sheet material 110, and an air injection valve 210 is welded to a portion where the air injection hole 130 is formed. The air inlet valve 210 is a valve through which air is introduced in one direction and does not flow back before opening the valve head, and when air is released after opening the valve head.

In addition, the air injection nozzle for injecting compressed air may be provided with two valves for effective control of the compressed air.

The two sheet metal materials 110 and 120 are heated by heating means before or during the injection of the compressed air.

The heating of the metal plate materials 110 and 120 as described above is to facilitate the expansion of the metal plate materials 110 and 120.

For example, the metal plate materials 110 and 120 may be locally heated using local heating means such as a torch. In this case, the heated portion and the unheated portion of the metal sheet materials 110 and 120 are different from each other in the amount of expansion by the compressed air. Therefore, various patterns, such as a wrinkled shape, can be formed easily.

In addition, it is also possible to heat the metal plate materials 110 and 120 entirely inside the kiln (pottery). In this case, even when a small amount and / or a small pressure of compressed air is used, the sheet metal materials 110 and 120 can be easily inflated, and when the compressed air of the same pressure as in the previous application is used, the sheet metal material 110, The amount of expansion of 120 may be increased to shorten the time required to manufacture the metal molding.

In addition, in the method of forming a metal molding according to an embodiment of the present invention, since the metal sheet material is formed by using compressed air after or during the heating of the metal sheet material, the prior application for molding the metal sheet material using only compressed air is disclosed. In comparison, a thick metal sheet material may be used, and a more swelled shape may be manufactured.

As a metal plate material for forming the metal molding, a steel plate, a copper plate, a stainless plate, or the like may be used.

The metal plate materials are different from each other. Therefore, heating temperature suitable for each physical property is required, but in the case of iron plate, a heating temperature of 1000 to 1200 ° C is used. This is less than 1000 ℃ expansion of the iron plate is not made well, if it exceeds 1200 ℃ may be melting the iron plate.

In the case of a copper plate, a heating temperature of 600 to 900 ° C is used, and in the case of a stainless plate, a heating temperature of 1000 to 1300 ° C is used.

In the case of the copper plate is less than 600 ℃ expansion is not made well, if it exceeds 900 ℃ copper plate may melt. And, in the case of the stainless plate is less than 1000 ℃ expansion is not made well, if it exceeds 1300 ℃ stainless plate may be melted.

The molding method of the metal molding described above can also be used to manufacture metal moldings made of metal plate materials of different thicknesses and metal plate materials of metal plate materials of different materials, which are described in the second and third embodiments. It demonstrates in an example.

Second Embodiment

Figure 4 shows a cross-sectional view of a metal molding according to a second embodiment of the present invention.

The metal molding 100a of this embodiment is formed of metal plate materials 110a and 120a having different thicknesses, and has an asymmetric cross-sectional shape.

That is, the metal molding 100a of the present embodiment is composed of a metal plate material 110a having a relatively thin thickness and a metal plate material 120a thicker than this material, and the metal plate materials 110a and 120a are made of the same material.

Since the metal moldings 100a have different thicknesses of the metal plate materials 110a and 120a, the expansion amount D1 of the thin metal plate material 110a is thin when the center of the line connecting the welding part 200 is centered. Is larger than the expansion amount D2 of the thick metal plate material 120a.

Therefore, the metal molding 100a formed of the metal plate materials 110a and 120a having different thicknesses may have an asymmetric cross-sectional shape when centering a line connecting the welding part 200.

Third Embodiment

5 is a cross-sectional view of a metal molding according to a third embodiment of the present invention. The metal molding 100b of this embodiment is formed of metal plate materials 110b and 120b of different materials, and has an asymmetric cross-sectional shape. Has

That is, the metal molding 100b of the present embodiment is composed of a metal plate material 110b having a relatively larger expansion amount and a metal plate material 120b having a smaller expansion amount than this material.

When the metal molding 100b is centered on a line connecting the welding part 200, the expansion amount D1 of the metal plate material 110b of a material that is relatively easier to expand is the expansion amount of the metal plate material 120b ( Larger than D3).

Therefore, when the metal plate materials 110b and 120b of different materials are used, the metal molding 100b having the same visual effect as in the second embodiment may be manufactured.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

In the forming method of the present embodiment described above, the bent portion is welded from the outside while the metal sheet material is bent and the bent portions are engaged with each other.

Therefore, the post-processing process for removing the edge portion of the metal plate material can be eliminated, so that the time required for the production of the metal molding can be shortened, and the three-dimensional molding having a beautiful appearance can be manufactured.

In addition, by using a metal plate material of different thicknesses or by using a metal plate material of different materials, it is possible to produce a metal molding of a more various shape.

Claims (11)

A metal molding in which two or more metal sheet materials are welded to each other at a welding section, and the metal sheet materials are expanded to a predetermined shape by compressed air injected into the interspace of the metal sheet material formed by the welding section. A metal molding in which an edge portion of the metal plate material protrudes in an inner space of the metal molding. In claim 1, The welded part is a metal molding formed in the bent portion where the metal sheet material is opposed to each other. The method of claim 1 or 2, Metal molding material having a different thickness of the metal plate material. The method of claim 1 or 2, Metal molding material of the metal plate material is made of different materials. A method of forming a metal molded article having a predetermined shape by welding two or more metal sheet materials in a welding section, and inflating the metal sheet material by injecting compressed air into the space between the metal sheet materials formed by the welding section. The welding is carried out while bending the edges of the metal plate material, and the bent parts to each other, A method of forming a metal molding wherein the metal sheet material is expanded by injecting the compressed air during or after heating the metal sheet material to a predetermined temperature. delete In claim 5, A metal plate is used as the metal plate material, and the method of forming a metal molding is heated to a temperature of 1000 to 1200 ℃. In claim 5, A method of forming a metal molding using a copper plate as the metal plate material and heating the copper plate to a temperature of 600 to 900 ° C. In claim 5, A method of forming a metal molding using a stainless plate as the metal plate material and heating the stainless plate to a temperature of 1000 to 1300 ° C. The method according to any one of claims 5, 7, 8 and 9, A molding method of a metal molding for locally heating the metal sheet material. The method according to any one of claims 5, 7, 8 and 9, The molding method of the metal molding which heats the said metal plate raw material whole.

Images