KR102012198B1 - Method for processing and assembling plate having different thickness - Google Patents

Abstract

Provided is a method for processing and assembling a steel sheet having different thicknesses, wherein the steel sheet having different thicknesses include: a first steel sheet area having first thickness; a second steel sheet area having second thickness different from the first thickness; and a third steel sheet area located between the first steel sheet area and the second steel sheet area, and formed of a tapered section in which the first thickness is changed into the second thickness. The method for processing the steel sheet having different thicknesses can comprise the following steps: pressurizing an upper surface of the first steel sheet area, the third steel sheet area, and the second steel sheet area by bending equipment; and performing a bending process with respect to the steel sheet having different thicknesses for a curvature to be formed in the longitudinal direction of the steel sheet having different thicknesses as the upper surface is pressurized.

Description

METHOD FOR PROCESSING AND ASSEMBLING PLATE HAVING DIFFERENT THICKNESS}

The present invention relates to a method for processing and assembling steel sheets having different thicknesses. In more detail, it is based on the processing method and the assembly method of the steel plate which consists of the thickness of a heterogeneous thickness centering on a tapered structure.

The members or structures of the ship differ in their degree of pressure from each part. Accordingly, when the ship is built, members or structures connected by welding steel plates of different thicknesses are applied to the blocks. Due to such a welding process, a problem arises in that the work man-hour is increased and the post-process is delayed.

In order to solve this problem, a new concept steel sheet (STEP, Steel Tapered Enhanced Plate) has been recently developed without welding two steel plates having different thicknesses and having different thicknesses in one steel sheet.

The step provides the advantage of improving the productivity and reducing the inspection time due to the reduced productivity of the welding process, since the welding process can be omitted, whereas the new shape allows the existing welded steel sheet to There is a problem that the processing method used in the above cannot be used.

Therefore, there is a need for a processing method for processing steps in which different thicknesses exist in a gentle slope in one steel sheet.

The technical problem to be solved by the present invention is to provide a machining method for a step.

Specifically, the technical problem to be solved by the present invention is to provide a processing method, such as cutting, bending, sheeting, member attachment to a steel sheet having a different thickness based on the tapered section in one steel sheet It is.

In addition, another technical problem to be solved by the present invention is to provide a marine member to which the step processing method is applied. In addition, another technical problem to be solved by the present invention is to provide a marine member to which the step assembly method is applied.

In addition, another technical problem to be solved by the present invention is to provide a method for manufacturing a ship structure in which the conventional lateral welding process is omitted by welding the step in the longitudinal direction continuously.

The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to one or more exemplary embodiments, a method of processing a steel sheet having a different thickness according to an embodiment of the present invention may include a first steel sheet region having a first thickness and a second thickness different from the first thickness in one steel sheet. Processing of a different thickness steel sheet comprising a second steel sheet region having a third steel sheet region located between the first steel sheet region and the second steel sheet region and having a tapered section that is changed from the first thickness to the second thickness A method comprising: dividing an upper surface of the third steel sheet region into a plurality of sections in units of a predetermined length along a direction of the tapered section, and performing a cutting operation at different cutting angles for each of the plurality of sections. It may include.

According to an embodiment, the dividing into a plurality of sections may include forming markings on the upper surface of the third steel sheet region, respectively, for distinguishing the plurality of sections for each preset length unit. The performing of the cutting operation may include cutting the dissimilar thickness steel sheet from the first steel sheet region to the second steel sheet region through the third steel sheet region. The cutting may be performed along the marking.

According to an embodiment of the present disclosure, the performing of the cutting may include: while the cutting is performed in the first section of the plurality of sections, the direction of the cutting external force applied to the first section may be the surface of the first section. While cutting is performed within a predetermined angle range from an angle perpendicular to and a cutting operation is performed in a second section different from the first section, the direction of the cutting external force applied to the second section is the second section. It may include the step of performing the cutting process within a predetermined angle range from the angle perpendicular to the surface of the.

According to an embodiment, the preset length unit may be preset from an angle at which the direction of the cutting external force applied to the first section is perpendicular to the surface of the first section while the cutting operation is performed in the first section. While the cutting operation is performed in the angular range, while the cutting operation is performed in the second section, the direction of the cutting external force applied to the second section is cut within the preset angle range from the angle perpendicular to the surface of the second section. Processing can be determined to be performed.

According to another aspect of the present invention, there is provided a method of processing a steel sheet having a dissimilar thickness, which includes a first steel sheet region having a first thickness and a second thickness different from the first thickness in one steel sheet. Processing of a different thickness steel sheet comprising a second steel sheet region having a third steel sheet region located between the first steel sheet region and the second steel sheet region and having a tapered section that is changed from the first thickness to the second thickness The method may further include pressing the upper surfaces of the first steel sheet region, the third steel sheet region, and the second steel sheet region by bending equipment, and as the upper surface is pressed, the longitudinal direction of the dissimilar thickness steel sheet. The bending process may be performed on the dissimilar thickness steel sheet so that curvature is formed about an axis.

According to one embodiment, the pressing step, the different thickness steel sheet is pressed by the bending equipment along the slope formed by the thickness of the first steel sheet region, the third steel sheet region and the second steel sheet region. As a result, a first pressure is applied to a thick steel sheet region among the first steel sheet region and the second steel sheet region, and the first steel sheet region is formed in a thin steel sheet region among the first steel sheet region and the second steel sheet region. A second pressure that is stronger than one pressure may be applied.

According to an embodiment, the pressing may include inserting a liner member to eliminate a height difference formed by a difference in thickness between the first steel plate region and the second steel plate region. After the insertion, the bending apparatus may include pressing the upper surfaces of the first steel sheet region, the third steel sheet region, and the second steel sheet region.

According to still another aspect of the present invention, there is provided a method of processing a steel sheet having a different thickness, in one steel sheet, a first steel sheet region having a first thickness, and a second thickness different from the first thickness. A second steel sheet region having a third steel sheet region including a second steel sheet region having a tapered section which is positioned between the first steel sheet region and the second steel sheet region and is changed from the first thickness to the second thickness. A processing method, comprising: contacting a steel sheet member to any one of the side, upper and lower portions of the dissimilar thickness steel sheet and contacting the steel sheet member so that the first steel sheet region and the dissimilar thickness steel sheet are between the steel sheet member and the dissimilar thickness steel sheet. Forming a height difference due to the difference in thickness of the second steel sheet region; and pressing the first steel sheet region and the second steel sheet region by pressing equipment. Group by pressing, the formed height difference may include the step of adjusting the height drive in the previously set range.

In one embodiment, the pressing step, the first pressure is applied to the thick steel sheet region of the first steel sheet region and the second steel sheet region by the pressing device, the first steel sheet region and the The second steel sheet region may include applying a second pressure stronger than the first pressure to the thin steel sheet region.

According to one embodiment of the present invention, there is an effect that a processing method for a newly developed dissimilar thickness steel sheet is provided.

In particular, according to the embodiment of the present invention, there is an effect that can provide the optimum cutting efficiency in the longitudinal cutting of the tapered section of the dissimilar thickness steel sheet.

In addition, according to an embodiment of the present invention, there is an effect that the processing method that can overcome the step due to the different thickness of the steel sheet used in the production of the ship structure or the member for the vessel is provided. Because of this, there is an advantage that the different thickness steel sheet can be widely utilized in various components of the ship.

Effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is an illustration of a dissimilar thickness steel sheet, referred to in some embodiments of the present invention.
2 and 3 are examples of the bending processing method of the different thickness steel sheet, referred to in one embodiment of the present invention.
4 is an illustration of a sheet metal working method of dissimilar thickness steel sheet according to another embodiment of the present invention.
5 is an illustration of a method for welding a built-up (BLT-UP) member of a dissimilar thickness steel sheet according to another embodiment of the present invention.
6 and 7 are exemplary views for explaining a method for manufacturing a structure for ships of dissimilar thickness steel plate, referred to in some embodiments of the present invention.
8 is an illustration of a method of cutting the dissimilar thickness steel sheet according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments may make the posting of the present invention complete and the general knowledge in the technical field to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase.

In the present specification, the different thickness steel sheet to which the embodiment of the present invention is applied will be mainly illustrated as a step, but the embodiment of the present invention can be widely applied to steel sheets having different thicknesses in one steel sheet, and the processing method of the step It is not limited to. The dissimilar thickness steel sheet may be represented by a steel sheet having a dissimilar thickness. In addition, a different thickness steel plate may be a heavy plate for ships, for example.

Further, in the present specification, the ship structure or the ship member may include various steel plate components constituting the inner or outer surface of the vessel.

1 is an illustration of a dissimilar thickness steel sheet, referred to in some embodiments of the present invention. Referring to FIG. 1, the dissimilar thickness steel sheet 100 includes, in one steel sheet, a first steel sheet region 101 having a first thickness, a second steel sheet region 103 having a second thickness different from the first thickness, and a first steel sheet. The first steel sheet region 101 and the second steel sheet region 103 may include a third steel sheet region 105 formed of a tapered section that is changed from the first thickness to the second thickness. For example, the different thickness steel sheet 100 may be a step.

2 and 3 are examples of the bending processing method of the different thickness steel sheet, referred to in one embodiment of the present invention. Bending processing is performed by bending equipment, for example, the bending equipment may be a 2200t roll press device or a 2500t roll press device, but is not limited thereto. Bending equipment may be a device for forming a curvature on the steel sheet in the longitudinal direction or the longitudinal direction of the steel sheet, widely used in the art.

2 and 3, the upper surfaces of the first steel sheet region 101, the third steel sheet region 105, and the second steel sheet region 103 may be pressed by the bending equipment 200, 210. In addition, as the upper surface is pressed, bending processing for the dissimilar thickness steel sheet 100 may be performed such that curvature is formed along the longitudinal direction of the dissimilar thickness steel sheet 100. At this time, the longitudinal direction of the dissimilar thickness steel plate 100 means the direction which passes the 3rd steel plate area | region 105 from the 1st steel plate area | region 101 toward the 2nd steel plate area | region 103. FIG.

Referring to FIG. 2, the inclination is formed by the thicknesses of the first steel plate region 101, the third steel plate region 105, and the second steel plate region 103. Along the inclination, the bending equipment 200 may be placed on the upper surface of the dissimilar thickness steel sheet 100 to pressurize the dissimilar thickness steel sheet 100.

In particular, in FIG. 2, one end of the bending equipment 200 placed on the first steel plate region 101 is raised in the direction opposite to the pressing direction 201, and the bending equipment 200 placed on the second steel plate region 103 is disposed. The other end is lowered in the pressing direction 203. That is, due to the thickness difference between the first steel plate region 101 and the second steel sheet region 103, the inclination occurs on the surface of the dissimilar thickness steel sheet 100, the bending equipment 200 may be placed along the generated inclination. . In addition, the bending equipment 200 presses the different thickness steel sheets 100 along the placed direction. Accordingly, a first pressure that is relatively weak is applied to the first steel plate region 101, which is a thick steel plate region, and a second pressure that is stronger than the first pressure may be applied to the second steel plate region 103, which is a thin steel sheet region. have. As such, by varying the application angle of one bending equipment, the different thickness steel sheet 100 is pressed with a pressure difference for each region, thereby minimizing the space between the bending equipment 200 and each region of the different thickness steel sheet 100. And bending efficiency and performance can be maximized.

Referring to FIG. 3, a liner member 300 may be inserted to eliminate the height difference formed by the difference in thickness between the first steel plate region 101 and the second steel plate region 103. Accordingly, the thickness of the second steel sheet region 103 may be compensated by the thickness of the first steel sheet region 101. With the liner inserted, the bending equipment 210 presses the upper surfaces of the first steel sheet region 101, the third steel sheet region 105, and the second steel sheet region 103, so as to press the different thickness steel sheet 100. Lengthwise bending processing is performed.

4 is an illustration of a sheet metal processing method for dissimilar thickness steel sheet according to another embodiment of the present invention.

Referring to FIG. 4 (a), the steel sheet member 400, which is a steel sheet to be welded, is in contact with the side portion of the dissimilar thickness steel sheet 100. In particular, in FIG. 4, the steel sheet member 400 is arranged on the side thereof in accordance with the length of the dissimilar thickness steel sheet 100. As the lengths of the two steel sheets 100 and 400 are matched, an existing mold line for welding the steel sheet may also be used in the case of welding the different thickness steel sheets 100. The steel plate member 400 may be a general steel plate maintained at one thickness.

As the steel sheet member 400 contacts the dissimilar thickness steel sheet 100, the thickness difference between the first steel sheet region 101 and the second steel sheet region 103 is between the steel sheet member 400 and the dissimilar thickness steel sheet 100. Due to the height difference is formed. In particular, the space 410 may be a space floated due to the height difference from the bottom surface of the dissimilar thickness steel sheet 100.

Referring to FIG. 4B, the first steel sheet region 101 and the second steel sheet region 103 are pressed by the pressing equipment 421 and 422. The pressurization equipment may be, for example, hydraulic pressure or roller pressure, but is not limited thereto. Pressurization equipment is widely used in the art to which the present invention belongs, minimizes the space 410 generated due to the thickness change of the dissimilar thickness steel sheet 100, the side and the steel plate member 400 of the dissimilar thickness steel sheet 100 It may be a device for applying a pressure to the second steel sheet region 103 of the dissimilar thickness steel sheet 100 to fit the side of the. In addition, the first steel sheet region 101 to fix the first steel sheet region 101 of the dissimilar thickness steel sheet 100 may be a device for applying a pressure. The pressurization equipment 421, 422 may be individual pressurization equipment, or may be a component included in one pressurization equipment, for example, a pressurization cylinder.

In addition, the pressing equipment 423, 424 may fix the steel sheet member 400 arranged in contact with the different thickness steel sheet 100. That is, the pressurizing equipment 421, 422, 423, 424 may fix the two steel sheets 100, 400 through a pressing operation in order to weld the dissimilar thickness steel sheet 100 and the steel sheet member 400. In particular, the pressurizing equipment 422 applies a strong pressure to the second steel sheet region 103 relative to the pressure applied by the pressurizing equipment 421, 423, 424 to the first steel sheet region 101 and the steel sheet member 400. As a result, the formed height difference may be adjusted to the height difference within a preset range. That is, the space 410 may be adjusted within a preset range. Accordingly, when welding the dissimilar thickness steel sheet 100 and the steel sheet member 400, side contact areas of both steel sheets may be maximized, convenience of the welding process may be increased, and welding strength may be maximized.

5 is an illustration of a built-up member welding machining method for a dissimilar thickness steel sheet according to another embodiment of the present invention. That is, it is an illustration of the method of attaching another steel plate member to a dissimilar thickness steel plate.

Referring to FIG. 5A, the built-up member 500, which is a steel sheet to be welded, is in contact with the upper portion of the dissimilar thickness steel sheet 100. In particular, in FIG. 5, the built-up member 500 was placed on top of the different thickness steel sheet 100. For example, the built-up member 500 may be a structure of a tee formed of a built-up web and a built-up face. In FIG. 5, the case in which the built-up member 500 is disposed on the upper portion of the dissimilar thickness steel sheet 100 is illustrated. According to another embodiment of the present invention, the dissimilar thickness steel sheet 100 may be disposed on the upper portion of the other steel sheet member. It may be.

As the built-up member 500 is in contact with the dissimilar thickness steel sheet 100, the thickness of the first steel sheet region 101 and the second steel sheet region 103 between the built-up member 500 and the dissimilar thickness steel sheet 100. Height difference due to the difference is formed. In particular, the space 510 may be a space generated due to the height difference on the upper surface of the dissimilar thickness steel sheet 100.

Referring to FIG. 5B, the first steel sheet region 101 and the second steel sheet region 103 are pressed by the pressing equipment 521 and 522. The pressurization equipment 521, 522 may be the same equipment as the pressurization equipment described in FIG. 4.

In particular, the pressurizing equipment 522 applies a strong pressure to the second steel sheet region 103 relative to the pressure applied by the pressurizing equipment 521 to the first steel sheet region 101. As a result, the formed height difference may be adjusted to the height difference within a preset range. That is, the space 510 may be adjusted within a preset range. Accordingly, when welding the dissimilar thickness steel sheet 100 and the built-up member 500, the contact area between the upper portion of the dissimilar thickness steel sheet 100 and the lower portion of the built-up member 500 is maximized and the convenience of the welding process is maximized. Can be increased and the welding strength can be maximized.

On the other hand, according to another embodiment of the present invention, as shown in Figure 5 (b), by the lower pressing equipment (523, 524), the different thickness steel plate 100 may be fixed.

6 and 7 are exemplary views for explaining a method for manufacturing a structure for ships of dissimilar thickness steel plate, referred to in some embodiments of the present invention.

FIG. 6 is an example of a method of manufacturing a ship structure by welding steel sheets having different thicknesses without applying the different thickness steel sheets 100 described above. Referring to FIG. 6, steel sheets 601, 602, 603, 604, and 605 having a first thickness and steel sheets 611, 612, 613, 614, and 615 having a second thickness are arranged in a mold line, respectively (S601). For example, the first thickness is 21.5 mm and the second thickness is 19 mm.

In step S602, the steel sheets 601, 602, 603, 604, 605 of the first thickness and the steel sheets 611, 612, 613, 614, 615 of the second thickness are laterally welded. Thereby, the steel plate of the different thickness which is 1st thickness and 2nd thickness is welded to one steel plate. However, one steel plate welded is the steel plate by which the two steel plates distinguished from the heterogeneous thickness steel plate 100 mentioned above were welded.

Next, five welded steel sheets are welded in a longitudinal direction (S603). Thus, the upper welding is finished, and in step S604, the longitudinally welded structure for the lower welding is turned over. In step S605, the lower transverse welding is finished, and in step S606, the lower longitudinal welding is performed. As a result, a ship structure in which a total of 10 steel sheets are welded is completed.

7 is an example of the case where the aforementioned dissimilar thickness steel sheet 100 is used for manufacturing a ship structure. In FIG. 7, the case where the different thickness steel sheets 701, 702, 703, 704, and 705 are arranged (S701) as an example of the different thickness steel sheets. Referring to FIG. 7, the upper portions of the different thickness steel sheets 701, 702, 703, 704, and 705 are longitudinally welded (S703), and after the welded structure is inverted (S705), lower longitudinal welding is performed (S705). In S707, the ship structure is completed.

In the case of FIG. 6, a total of six steps were required, but in the case of FIG. 7, only four steps were used, and manufacturing a structure for ships using dissimilar thickness steel sheets has an advantage of significantly shortening air.

8 is an illustration of a method of cutting the dissimilar thickness steel sheet according to another embodiment of the present invention.

Referring to FIG. 8, the upper surface of the third steel plate region 105 is divided into a plurality of sections in units of a predetermined length along the direction of the tapered section, that is, along the length direction of the third steel sheet region 105. Can be. For example, when the length of the third steel sheet region 105 of the dissimilar thickness steel sheet 100 is 1 m, the preset length unit may be 250 mm. In this case, the third steel plate region 105 is divided into quarters in the longitudinal direction.

According to the exemplary embodiment of the present invention, markings A, B, and C may be formed on the upper surface of the third steel sheet region 105 to distinguish the plurality of sections for each preset length unit. The markings A, B, and C may be actually displayed on the upper surface of the dissimilar thickness steel sheet 100.

Next, the cutting process may be performed at different cutting angles for each of the plurality of sections. For example, while the cutting equipment (not shown) passes through the tapered section, while performing the cutting operation, the distance from the external force exerted by the cutting equipment to the top of the third steel sheet region 105 is changed. This is because the third steel plate region 105 has an inclination. In this case, the external force for cutting can be most effectively applied when the cutting equipment is at an angle at which the cutting external force is applied, for example, the cutting angle of the torch is perpendicular to the upper surface of the third steel plate region 105. To this end, the cutting equipment may perform the cutting process by changing the torch angle during the first predetermined section, while maintaining the first angle, and then changing the second angle to the second angle in the next second section. The cutting external force angle may be, for example, a torch angle, and the first and second angles may be angles within a preset angle range from angles perpendicular to the surfaces of the first and second sections, respectively.

The cutting process is performed on the dissimilar thickness steel sheet 100 from the first steel sheet region 101 to the third steel sheet region 105 through the second steel sheet region 103. In particular, the third steel sheet region 105 Cutting lines may be formed along markings A, B and C. The cutting equipment may be, for example, a milling apparatus or a plasma apparatus, but is not limited thereto. The cutting equipment described above may be cutting equipment widely used in the art to which the present invention pertains.

Meanwhile, the preset length unit may be changed according to the length of the tapered section. That is, the preset length unit may be determined as a distance such that the first angle and the second angle satisfy an angle condition within a preset angle range from angles perpendicular to the surfaces of the first and second sections, respectively. . That is, in order to maintain the angle at which the cutting external force acts on the upper surface of the third steel sheet region 105 at a predetermined level, a plurality of sections of the upper surface of the third steel sheet region 105 should be divided into predetermined lengths. The predetermined length unit may be determined as a distance that can be divided into a plurality of sections.

The bending equipment, the cutting equipment, and the pressing equipment are equipment for processing the different thickness steel sheets 100, and may be individual equipment, but the control device or software for controlling each equipment may be the same. For example, the control device may include a memory for loading the software and a processor for calculating the loaded software. The control device may be provided in each of the bending equipment, the cutting equipment, and the pressing equipment. Thus, the control device receives at least one of the length information of the tapered section, the thickness information of the first thickness and the second thickness, and the inclination angle of the tapered section according to the user's setting. Bending processing, cutting processing of the cutting equipment, it can be controlled to perform the pressing processing of the pressing equipment.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it is to be understood that the embodiments described above are exemplary in all respects and not restrictive.

100 dissimilar thickness steel plate
105 tapered sections
200 first press device
210 second press device
300 liner structures
400 steel plates subject to judgment
500 built-up absence

Claims (2)

Within one steel sheet, a first steel sheet region having a first thickness, a second steel sheet region having a second thickness different from the first thickness, and located between the first steel sheet region and the second steel sheet region and having the first thickness In the processing method of the dissimilar thickness steel sheet comprising a third steel sheet region consisting of a tapered section is changed to the second thickness in,
Pressing upper surfaces of the first steel sheet region, the third steel sheet region and the second steel sheet region by bending equipment; And
As the upper surface is pressed, the bending process for the dissimilar thickness steel sheet is performed so that curvature is formed along the longitudinal direction of the dissimilar thickness steel sheet,
The pressing may include pressing the dissimilar thickness steel sheet along a slope formed by thicknesses of the first steel sheet region, the third steel sheet region, and the second steel sheet region by the bending equipment. A first pressure is applied to the thick steel sheet region among the steel sheet region and the second steel sheet region, and a second stronger than the first pressure is applied to the thin steel sheet region among the first steel sheet region and the second steel sheet region. Comprising a step of applying pressure,
Processing method of steel sheet having different thickness. The method of claim 1, wherein the pressing step,
Inserting a liner member for eliminating the height difference formed by the difference in thickness between the first steel sheet region and the second steel sheet region; And
After the liner member is inserted, pressing the upper surfaces of the first steel sheet region, the third steel sheet region and the second steel sheet region by the bending equipment;
Processing method of steel sheet having different thickness.

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