KR20150042632A

KR20150042632A - Manufacturing method of metal sheet using 3D-printing and the metal sheet

Info

Publication number: KR20150042632A
Application number: KR20130121521A
Authority: KR
Inventors: 양동열; 이성욱
Original assignee: 한국과학기술원
Priority date: 2013-10-11
Filing date: 2013-10-11
Publication date: 2015-04-21

Abstract

The manufacturing method of metal sheet using 3D-printing that can control local properties and minimize the loss of materials by applying the 3D printing technology of the present invention comprises the steps of: spreading or melting and attaching strengthening materials and functional materials on a random position at the top/bottom of the conventional sheet and controlling the local material properties; and minimizing the loss of materials through controlling of position of additional materials. According to the present invention, the present invention relates to manufacturing of high-intensity light-weight sheet that can control local properties by using the 3D printing technology. The present invention can change the value of properties by controlling the materials and image of the position desired by the producer with the 3D printing technology, design the design of materials and properties to suit the performance needed by the final product on the basis of that, and perform the properties control for improvement of formability. The sheet material manufactured comes to have the optimum value of properties, and the present invention can remove the use of unnecessary materials, prevent the loss of materials, and materialize a light weight.

Description

Technical Field [0001] The present invention relates to a method of manufacturing a steel sheet using a three-dimensional printing technique,

The present invention relates to a method of manufacturing a steel plate using a three-dimensional printing technique, and more particularly, to a method of manufacturing a high strength and lightweight metal plate that can be used in various industries such as building structures, ships, automobiles, airplanes, And a method of manufacturing a steel sheet using the 3D printing technology.

Metal plate materials are used in a variety of applications such as building structures, transportation equipment, and products. Recently, they have been interested in high-strength lightweight materials for improving fuel efficiency, including high-rise buildings and large structures.

As metal plate materials continue to require high strength and lightweight materials, research is under way on many ways, including the development of high strength metal materials, bonding with heterogeneous materials, and the construction of sandwich structures.

3D printing technology, which is a material production technology that has recently become popular, can also be applied as an element technology for manufacturing a high strength lightweight plate. Particularly, the ability to produce 3D arbitrary shapes of 3D printing and the ability to use various raw materials at the same time are significant advantages in producing such high strength and lightweight sheet materials. The material property can be designed from the initial blank sheet material considering the formability and performance of the final product while manufacturing the metal sheet material, and the designed physical property value can be realized as 3D printing technology.

1 is a conceptual view showing a method of manufacturing a conventional plate material. FIG. 1 shows a method of manufacturing a plate material having a desired physical property by changing the thickness of the plate material by controlling the thickness of the plate material during rolling. 2 is a conceptual diagram showing a method of controlling the physical properties of a material by welding a plate material of different thickness as a process for manufacturing TWB of the following conventional patent document 1.

As shown in FIGS. 1 and 2, there is a method of manufacturing a metal plate having high strength and light weight by locally controlling the thickness. However, such a manufacturing method requires a lot of cost to manufacture an initial blank plate and may cause defects such as brittleness and corrosion at the welded part, and the productivity is low. Therefore, if the physical properties of the material are controlled finely using 3D printing technology, customized physical properties can be given according to the user's requirement, so that the loss of the material can be minimized and the optimum lightweight material can be produced. It is possible to prevent productivity deterioration because it is made into plate type which is the initial blank shape instead of making it. The rolling process can solve problems such as stacking defects, internal bubbles, mechanical bonding strength and surface roughness, Is possible.

KR 10-1277858 B1

SUMMARY OF THE INVENTION The present invention has been made to overcome the above problems, and it is an object of the present invention to manufacture precise physical property control and optimal lightweight plate in a conventional high strength lightweight plate. By applying the 3D printing technology, it is possible to control the physical properties by position and control the physical properties of the material so as to have the properties required by the designer of the product. This makes it possible to minimize the amount of material used and to achieve a light weight effect. In order to cope with the production of various kinds of varieties and shape parts in accordance with the customer's tendency as the demand of consumer-oriented production technology is gradually increased, a method of manufacturing a steel plate using a three-dimensional printing technique And the like.

According to an aspect of the present invention, there is provided a method of manufacturing a metal plate, which is capable of controlling local physical properties and minimizing material loss by applying 3D printing technology according to the present invention, Coating or melt-adhering a reinforcing material and a functional material at a location of the reinforcing material and the functional material to control local material properties; And (b) minimizing the loss of material through position control of the additional material.

According to the present invention, there is provided a method for manufacturing a high strength lightweight plate capable of controlling local physical properties using a 3D printing technique. In the 3D printing technique, a material and an image of a desired position can be controlled by a manufacturer to change a physical property value. Based on this, it is possible to design the material properties according to the performance required by the final product, and also to control the physical properties to improve the moldability. Since the manufactured plate-shaped material has an optimum physical property value, the use of unnecessary materials can be eliminated, and thus it is possible to prevent loss of material and achieve weight reduction.

In addition, when the blank plate shape is directly manufactured in the metal melt, it is possible to directly produce the shape desired by the consumer. In addition, since the manufacturing process is simple when using the 3D printing technology, the plate shape and the process change are easy . Therefore, it has the advantage of being able to respond quickly to various products. In case of 3D printed materials, the internal defects, the deterioration of bonding strength and the surface roughness are poor. This is added to the manufacturing process so that it can be solved by the rolling process.

1 is a conceptual view showing a method of manufacturing a conventional plate material;
FIG. 2 is a conceptual diagram showing a process for manufacturing a TWB of the conventional patent document 1; FIG.
3 is a conceptual diagram showing bending characteristics of a general plate member.
4 is a process conceptual diagram of a method for enhancing local physical properties of a sheet material using 3D printing according to an embodiment of the present invention.
5 is a view showing a method of manufacturing the plate material proposed in the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

3 is a conceptual diagram showing bending characteristics of a general plate member.

As shown, the tension and compression occurring during bending are concentrated at the upper and lower portions 32 of the plate material, and the inner member 31 is mainly subjected to compression and shearing. These characteristics show the characteristics of the lightweight structure like the sandwich plate, and show that the strengthening effect can be maximized by fusing the reinforcing member on the surface of the plate.

In the following, we propose a method to directly produce an initial blank plate with the metal melt and metal granules in the production of plate and gypsum plates to control the properties by locally fusing the reinforcement or functional material to the outside of the metal plate using 3D printing technology do. Recently, the demand for materials with high strength and light weight has increased rapidly, and the research on this has become more active. As a method of controlling the physical properties of the plate material, there are a method of changing the physical property value of the metal element, a lamination and bonding of different materials, and a different thickness depending on the position such as TWB (Tailor Welded Blank) and TRB (Tailor Rolled Blank) However, as the material properties gradually become more demanding, there is a demand for a technique capable of controlling local material properties and manufacturing various shapes. Hereinafter, a method of manufacturing a metal plate using shape position control and various material applicability, which is an advantage of 3D printing technology, will be described in more detail with reference to FIGS. 4 and 5.

FIG. 4 is a diagram illustrating a process concept of a method for enhancing local physical properties of a plate using 3D printing according to an embodiment of the present invention.

As shown in the figure, an example of manufacturing a B-pillar part of an automobile is shown in which a reinforcement material 43 is fused and applied to a section to be reinforced by the initial blank material 41 by a 3D printing 42 method, And finally the blank material 44 of the B-pillar part is manufactured through the process shown in FIG.

That is, the functional material is applied and fused by the 3D printing 4b and 4c on the surface of the plate material 4a of the initial blank shape, and then the rolling process 4d is performed to strengthen the adhesion between the materials and to remove internal defects. The final product 4f is produced through the use of the sheet material 4e made of the same material. For example, in the case of an aluminum plate, which is a light metal, when a high-strength material is fused to a surface of an aluminum plate in mesh or plate form and then rolled, the portion most affected by the main deformation of the plate, The reinforcing material is distributed on the surface of the plate material, so that the strength of the material can be dramatically increased compared to the weight.

5 is a view showing a method of manufacturing the plate material proposed in the present invention.

As shown in the figure, a process of directly laminating an initial blank shape 51 from a metal melt by a 3D printing technique and directly manufacturing a plate material having different local physical properties by attaching a functional material 52 during 3D printing. And the plate material produced on this basis is rolled to produce the final blank material 53.

That is, in order to directly manufacture the blank plate material in the melt bath, an initial blank shape is formed in a laminate form in the melt bath as shown in FIG. 5 (5a). (5b, 5c) is formed by directly laminating a functional material or other phase structure on a portion (for strengthening or weakening for better molding) to control the physical properties during the above-mentioned process. Thereafter, the rolling process (5d) is carried out to remove internal defects, increase the surface roughness, and increase the bonding strength. And the final thread product 5f is formed through the molding process with the blank material 5e whose local physical properties are controlled based on the result.

As a result, in the method of manufacturing a metal plate which can control the local physical properties and minimize the material loss by applying the 3D printing technology of the present invention, it is possible to apply the reinforcing material and the functional material to any position of the upper / The local material property control can be performed and the loss of the material can be minimized by controlling the position of the additional material. In addition, after 3D printing, it is possible to improve the bonding strength between the materials, remove bonding defects, and control the surface roughness through an additional rolling process.

Further, in a manufacturing method for directly producing a blank sheet material by using a 3D printing technique using molten metal or metal particles instead of a process of producing a blank sheet material from a conventional molten metal through a rolling process and then cutting the blank sheet material, It is possible to produce the shape of the desired plate without loss of material. Various functional materials can be added to the inside and the outside of the plate by using 3D printing technology, or it is possible to implement the reinforced structure in a geometric manner. In this manufacturing method, after the 3D material is manufactured by the 3D printing method, the inner material can be removed by the rolling process to secure the advantages such as an increase in mechanical strength. Further, a method of fusing a dissimilar material to the surface of the plate material may be further performed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

31: inner layer of metal sheet
32: upper and lower portions of the metal plate, surface layer
41: Initial blank sheet of B-pillar part
42: 3D printing nozzle unit
43, 52: a functional material layer fused or coated with 3D printing
44, 53: B-pillar blank plate with local property control
51: B-pillar blank sheet material unit elements laminated by 3D printing
45, 54: Strengthening area of B-pillar parts

Claims

A manufacturing method for a metal plate material capable of controlling local physical properties and minimizing material loss by applying 3D printing technology,
(a) applying a reinforcing material and a functional material to an arbitrary position on / under a conventional sheet material or applying the same to melt, thereby controlling local material properties; And
(b) minimizing the loss of material through position control of the additional material.

The method according to claim 1,
Further comprising the steps of: after the 3D printing, further improving the bonding strength between the materials through the additional rolling process, removing bonding defects, and controlling the surface roughness
Wherein the metal plate is made of a metal.

The method according to claim 1,
Further comprising the step of removing the internal bubbles or defects through the rolling process after the 3D printing, thereby securing advantages such as an increase in mechanical bonding force
Wherein the metal plate is made of a metal.