KR20240071223A - Press forming device - Google Patents

Abstract

The present invention relates to a press forming device capable of improving the shear forming quality of a plate, comprising a forming punch part installed to be able to move up and down toward a sheet material, and by lowering or raising the forming punch part that passes through the sheet material. , a shear forming part for shearing and forming at least a portion of the sheet, and a counter punch part installed to be raised and lowered toward the sheet in a direction opposite to the raising and lowering direction of the forming punch part, penetrating the shear portion of the sheet. and a counter forming part that removes compression burrs generated on the shear surface of the sheet material during the shear forming process of the forming punch part by raising or lowering the counter punch part passing through the forming punch part. It is formed to have a stepped portion on the penetrating end side, and during shear processing of the plate, at least a portion of the edge of the shear portion can be compression molded by the stepped portion to generate the compression burr.

Description

Press forming device {Press forming device}

The present invention relates to a press forming device, and more specifically, to a press forming device that can improve the shear forming quality of a sheet material.

In general, press processing is a type of plastic processing that can be molded into a desired product by cutting or changing the shape of a plate-shaped material using a press molding device. For example, shearing, punching, The material can be processed into many forms including trimming, bending, burring, curling and drawing. In this press molding device, raw materials such as a plate are provided between the upper and lower molds of a mold mounted inside, and then the upper mold is brought into close contact with the lower mold and then pressed to mold the product.

Meanwhile, in recent years, there has been a demand for automobile body frame parts to improve crash safety and reduce carbon emissions by reducing the weight of the vehicle body, and to achieve these requirements, the application of high-strength steel sheets with high strength is increasing.

In the shear forming process where high-strength steel sheets are applied, burrs, roll-overs, fractures, etc. easily occur on the shear forming surface. These problems are resolved and the quality of the shear forming surface is improved. To improve this, the shaving process is mainly used, in which, after shear forming, the shear forming surface is again processed to be flat.

However, the shaving process to improve the quality of the conventional shear forming surface also requires optimization of the mold, such as optimal clearance adjustment to reduce burrs or pressure surfaces generated on the shear forming surface, and this optimization of the mold also requires shearing. There was a problem in that burrs or pressure surfaces generated on the molded surface were not completely removed. In addition, the shaving process also involves shearing and forming the sheared surface once again, so there was a problem that new burrs or pressed surfaces could be generated during the shaving process.

The present invention is intended to solve various problems including the problems described above, and its purpose is to provide a press forming device that can improve the quality of the shear forming surface during shear forming of a sheet material. However, these tasks are illustrative and do not limit the scope of the present invention.

According to one embodiment of the present invention, a press forming apparatus is provided. The press forming device includes a forming punch part installed to be able to be raised and lowered toward the sheet material, and performs shearing forming at least a portion of the sheet material by lowering or raising the forming punch part that passes through the sheet material. molding unit; and a counter punch unit installed to be capable of being raised and lowered toward the plate in a direction opposite to the raising and lowering direction of the forming punch unit, and by the raising or lowering of the counter punch unit passing through the shear portion of the plate, the forming punch. A counter molding part that removes compression burrs generated on the shear surface of the sheet during the shear forming process, wherein the forming punch part is formed to have a stepped portion on an end side penetrating the sheet, During shear processing, the compression burr may be generated by compression molding at least a portion of the edge of the shear portion by the step portion.

According to one embodiment of the present invention, the shear forming part and the counter forming part are formed sequentially along the transport direction of the sheet in one progressive mold so that they can be formed in separate stage processes, or They can be formed individually in different single molds.

According to one embodiment of the present invention, the shear forming part is installed on the upper mold or lower mold of the molding mold in which the plate is supported, and at least a portion of the end penetrates the plate by a downward or upward movement, thereby forming at least one of the plate. The forming punch part for shear forming a portion; and is formed to face the forming punch part and is installed on the lower mold or the upper mold of the forming mold so as to support the sheet material, and is formed so that at least a portion of the end of the forming punch part that penetrates the sheet material can be inserted. It may include a molding die portion in which a groove portion is formed.

According to one embodiment of the present invention, the forming punch unit includes a shear forming tip formed at a first width at an end of the forming punch unit so as to penetrate the forming area of the plate; and forming the stepped portion at the rear of the shear forming tip based on the moving direction of the forming punch for shear forming of the sheet material, so that the shear forming tip penetrates the sheet material and performs shearing of the sheet material during shearing processing of the sheet material. It may include a compression molding tip formed with a second width larger than the first width so as to compression mold at least a portion of the edge portion of the portion.

According to one embodiment of the present invention, the molding groove portion may be formed to have the first width so that only the front forming tip portion of the molding punch portion of the molding die portion can be inserted into the molding groove portion.

According to one embodiment of the present invention, the forming punch unit is such that, during shearing processing of the plate, the step formed at the rear of the shear forming tip by the compression forming tip is supported by the upper surface of the edge portion of the forming groove. By compression molding the edge portion of the shear portion of the plate, the compression burr may be generated below or above the shear portion.

According to one embodiment of the present invention, the shear forming part is installed on one side of the forming punch part to face the forming die part with the plate between the upper mold or the lower mold of the forming mold, and the forming punch part When shear forming the plate, the molding blank holder portion presses and holds one side of the plate. It may further include.

According to one embodiment of the present invention, the counter molding unit is installed on the lower mold or upper mold of the molding mold in which the plate sheared in the shear molding portion is supported, and at least a portion of the end is formed by the upward or downward movement of the plate. The counter punch part penetrates the shear portion of the plate and removes the compression burr generated on the shear surface of the plate; and a counter die portion installed on the lower mold or the upper mold of the forming mold to support the plate material, and in which a counter groove is formed to accommodate the counter punch portion.

According to one embodiment of the present invention, the counter punch part may be formed to have a second width equal to the width of the compression molding tip of the forming punch part.

According to one embodiment of the present invention, the counter punch unit strikes the compression burr in a direction opposite to the direction of compression molding of the compression burr by the compression molding tip of the forming punch unit, thereby striking the compression burr from the shear portion of the sheet material. Compression burrs can be removed.

According to one embodiment of the present invention, the counter molding part is installed to face the counter die part in the upper mold or the lower mold of the molding mold with the plate in between, so that when the counter punch part removes the compression burr, , a counter blank holder portion that presses and holds one side of the plate.

According to one embodiment of the present invention, the front forming part and the counter forming part may be formed in the same stage process in one forming mold.

According to one embodiment of the present invention, the shear forming part is installed on the upper or lower mold of the forming mold in which the plate is supported, and at least a portion of the end penetrates the plate by a downward or upward movement, thereby forming the plate. The forming punch part for shear forming at least a portion; and is formed to face the forming punch part and is installed on the lower mold or the upper mold of the forming mold so as to support the sheet material, and is formed so that at least a portion of the end of the forming punch part penetrating the sheet material can be inserted. a molding die in which a groove is formed, wherein the counter molding portion is installed in the molding groove, and at least a portion of an end penetrates the shear portion of the plate by an upward or downward movement, It may include the counter punch unit for removing the compression burr generated on the cross section.

According to one embodiment of the present invention, the forming punch unit includes a shear forming tip formed at a first width at an end of the forming punch unit so as to penetrate the forming area of the plate; and forming the stepped portion at the rear of the shear forming tip based on the moving direction of the forming punch for shear forming of the sheet material, so that the shear forming tip penetrates the sheet material and performs shearing of the sheet material during shearing processing of the sheet material. It may include a compression molding tip formed with a second width larger than the first width so as to compression mold at least a portion of the edge portion of the portion.

According to one embodiment of the present invention, the counter punch part is formed in a hollow shape and installed in the forming groove part, so that only the shear forming tip part of the forming punch part can be inserted into the hollow part when shearing the sheet material. , the hollow portion may be formed to have the first width.

According to one embodiment of the present invention, the forming punch unit, during shear processing of the plate material, the step formed at the rear of the shear forming tip by the compression forming tip is supported by the upper surface of the counter punch unit. By compression molding the edge of the shear portion, the compression burr can be generated below or above the shear portion.

According to one embodiment of the present invention, the shear forming part is installed on one side of the forming punch part to face the forming die part with the plate between the upper mold or the lower mold of the forming mold, and the forming punch part It may further include a forming blank holder part that presses and holds one side of the sheet when shear forming the sheet or when the counter punch part removes the compression burr.

According to one embodiment of the present invention, the counter punch part may be formed to have a second width equal to the width of the compression molding tip of the forming punch part.

According to one embodiment of the present invention, the counter punch unit strikes the compression burr in a direction opposite to the direction of compression molding of the compression burr by the compression molding tip of the forming punch unit, thereby striking the compression burr from the shear portion of the sheet material. Compression burrs can be removed.

According to an embodiment of the present invention made as described above, the edge portion of the shear portion of the plate is formed during the shear forming process of the plate by the step-shaped molding punch portion formed on the end side that penetrates the plate. After compression molding to generate a compression burr, the compression burr can be easily removed from the shear surface by hitting the compression burr in a direction opposite to the compression direction using a counter punch unit.

In this way, during the shear forming process of the plate, compression burrs are intentionally generated at the shear portion of the plate by the step-shaped molding punch section where the step is formed, thereby reducing the thickness of the burr generated by compressive stress and reducing the thickness of the plate. The occurrence of roll-over on the cross section can be suppressed, and the compression burr can be easily and cleanly removed by hitting the counter punch part due to the compressive stress accumulated in the compression burr.

Therefore, in the shear forming process where high-strength steel sheets are applied, it is possible to secure a high-quality shear forming surface with few burrs or internal cracks, and by securing a high-quality shear forming surface, it is possible to suppress the occurrence of breakage of the product in the post-process, thereby preventing the final product from breaking. A press molding device that can increase product quality and yield can be implemented. Of course, the scope of the present invention is not limited by this effect.

Figure 1 is a cross-sectional view schematically showing the shear forming part of a press forming apparatus according to an embodiment of the present invention.
Figures 2 to 4 are cross-sectional views showing step by step the process of shear forming a plate by the shear forming unit of Figure 1.
Figure 5 is a cross-sectional view schematically showing the counter forming part of the press forming apparatus according to an embodiment of the present invention.
Figures 6 to 8 are cross-sectional views showing step by step the process of removing compression burrs generated on the front surface of the plate by the counter forming part of Figure 5.
Figure 9 is a cross-sectional view schematically showing the shear forming part and the counter forming part of the press forming apparatus according to another embodiment of the present invention.
Figures 10 to 15 are cross-sectional views showing step by step the process of shear forming a sheet by the shear forming unit and the counter forming unit of Figure 9 and the process of removing compression burrs generated on the shear surface.

Hereinafter, various preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the following examples may be modified into various other forms, and the scope of the present invention is as follows. It is not limited to the examples. Rather, these embodiments are provided to make the present disclosure more faithful and complete and to fully convey the spirit of the present invention to those skilled in the art. Additionally, the thickness and size of each layer in the drawings are exaggerated for convenience and clarity of explanation.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will now be described with reference to drawings that schematically show ideal embodiments of the present invention. In the drawings, variations of the depicted shape may be expected, for example, depending on manufacturing technology and/or tolerances. Accordingly, embodiments of the present invention should not be construed as being limited to the specific shape of the area shown in this specification, but should include, for example, changes in shape resulting from manufacturing.

Figure 1 is a cross-sectional view schematically showing the shear forming unit 100 of the press forming apparatus 1000 according to an embodiment of the present invention, and Figures 2 to 4 show the shear forming unit 100 of Figure 1 as a plate ( These are cross-sectional views showing step by step the shear forming process of 1). And, Figure 5 is a cross-sectional view schematically showing the counter forming part 200 of the press forming apparatus 1000 according to an embodiment of the present invention, and Figures 6 to 8 show the counter forming part 200 of Figure 5. These are cross-sectional views showing step by step the process of removing compression burrs (B) generated on the front surface (11a) of the plate (10).

First, as shown in FIGS. 1 and 5, the press forming apparatus 1000 according to an embodiment of the present invention may largely include a shear forming unit 100 and a counter forming unit 200.

The shear forming part 100 and the counter forming part 200 are formed individually in a separate stage process, and are formed sequentially along the transport direction of the sheet material 10 in one progressive mold. , can be formed individually in different single molds.

At this time, when the shear forming part 100 and the counter forming part 200 are individually formed in different single molds, a tandem press is used to mold the product by setting one single mold in one press device. It can be applied to each device individually, or it can be applied together to a transfer press device that molds a product by setting all molds for the entire process in one press device.

For example, as shown in FIG. 1, the shear forming unit 100 includes a forming punch unit 110 installed to be capable of being raised and lowered toward the plate 10, and the forming punch passes through the plate 10. By lowering or raising the portion 110, at least a portion of the plate 10 can be sheared.

Here, shear forming includes blanking processing to remove a plate of a predetermined shape from the plate 10, piercing processing to form a hole in the plate 10, and forming the formed plate 10. It may include trimming processing to cut the irregular edge portion of the plate 10 and notching processing to cut the edge portion of the plate 10 into a desired shape. In addition, in the press forming process of the plate 10, the term may include all processing processes in which a shear surface may occur in the plate 10.

More specifically, as shown in FIG. 1, the shear molding unit 100 for shearing and molding at least a portion of the plate 10 is installed on the upper mold of the mold in which the plate 10 is supported, and is moved by a downward movement. At least a portion of the end penetrates the plate 10, and includes a molding punch portion 110 for shearing and forming at least a portion of the plate 10, and a molding punch portion 110 formed to face the molding punch portion 110 to support the plate 10. A molding die portion 120 installed on the lower mold of the molding mold and having a molding groove 121 formed so that at least a portion of the end of the molding punch portion 110 that penetrates the plate 10 can be inserted, and The upper mold of the forming mold is installed on one side of the forming punch unit 110 to face the forming die unit 120 with the plate 10 interposed therebetween, so that the forming punch unit 110 shears and forms the plate 10. It may include a molded blank holder portion 130 that presses and holds one side of the plate 10.

Here, the forming punch unit 110 and the forming blank holder unit 130 are installed on the upper mold of the forming mold and move downward toward the upper surface of the sheet material 10, and the forming die unit 120 is installed in the upper mold of the forming mold. As an example, it is installed on the lower mold of the mold to support the lower surface of the plate 10, but it is not necessarily limited to FIG. 1, and the molding punch portion 110 and the molding blank holder portion 130 are provided in the mold of the mold. It is installed on the lower mold and moves upward toward the lower surface of the plate 10, and the molding die unit 120 may be installed on the upper mold of the mold and support the upper surface of the plate 10 by vacuum suction or the like.

As shown in FIGS. 1 to 4, the forming punch unit 110 is formed at a first width W1 at the end of the forming punch unit 110 so as to penetrate the forming area of the plate 10. Based on the direction of movement of the shear forming tip 111 and the forming punch unit 110 for shear forming of the plate 10, a step portion 113 is formed at the rear of the shear forming tip 111, and the shear forming tip 111 is formed. When the forming tip 111 penetrates the plate 10 and shears the plate 10, a second width W1 larger than the first width W1 is formed so that at least a portion of the edge of the shear area 11 can be compression molded. It may be composed of a compression molded tip 112 formed with a width W2.

In addition, the forming die unit 120 has a forming groove 121 formed to have a first width W1 so that only the front end forming tip 111 of the forming punch part 110 can be inserted into the forming groove 121. It can be.

Here, as an example, the molding punch portion 110, the shear molding tip 111, and the molding groove portion 121 of the molding die portion 120 are formed to have the same first width W1, but this is a theoretical design dimension. This means that is the same, in reality, a fine dimensional difference equal to the tolerance for adjusting the clearance between the molding groove 121 and the shear molding tip 111 may occur.

Accordingly, as shown in FIGS. 2 to 4, the forming punch unit 110 moves downward from the upper mold of the forming mold and is sheared by the compression molding tip 112 during shearing processing of the plate material 10. The stepped portion 113 formed at the rear of the molding tip 111 forms an edge portion of the front end portion 11 of the plate material 10 supported by the upper surface of the edge portion of the molding groove portion 121 of the molding die portion 120. By compression molding, a compression burr (B) can be generated on the lower side of the shear portion 11 of the plate material 10. At this time, the forming punch unit 110 moves upward from the lower mold of the forming mold to generate a compression burr B on the upper side of the shear portion 11 of the sheet material 10 during shearing processing of the sheet material 10. You can do it.

As shown in FIG. 5, the counter forming unit 200 includes a counter punch unit 210 installed to be capable of being raised and lowered toward the plate 10 in a direction opposite to the raising and lowering direction of the forming punch unit 110. , due to the rise of the counter punch unit 210 passing through the shear portion 11 of the plate 10, the shear surface 11a of the plate 10 occurs during the shear forming process of the forming punch unit 110. The compression burr (B) can be removed.

More specifically, the counter molding unit 200 is installed on the lower mold or upper mold of the molding mold in which the plate 10 sheared in the shear molding section 100 is supported, and at least a portion of the end portion is formed by the upward movement of the plate ( A counter punch part 210 that penetrates the shear portion 11 of the plate 10 and removes the compression burr B generated on the shear surface 11a of the plate 10, and supports the plate 10. A counter die portion 220 is installed on the lower mold of the mold and has a counter groove portion 221 to accommodate the counter punch portion 210, and a plate 10 is placed between the upper mold and the mold. It may include a counter blank holder portion 230 that is installed to face the counter die portion 220 and presses and holds one side of the plate 10 when the counter punch portion 210 removes the compression burr (B). there is.

Here, the counter punch unit 210 and the counter die unit 220 are installed on the lower die of the forming mold, so that the counter punch unit 210 moves upward toward the lower surface of the plate material 10, and the counter blank holder unit As an example, 230 is installed on the upper mold of the forming mold to support the upper surface of the plate 10, but it is not necessarily limited to FIG. 5, and the counter punch portion 210 and the counter die portion 220 are , the counter punch part 210 is installed in the upper mold of the forming mold and moves downward toward the upper surface of the plate 10, and the counter blank holder part 230 is installed in the lower mold of the forming mold and moves the plate ( The lower surface of 10) can also be supported.

This counter punch portion 210 may be formed with a second width W2 that is equal to the width of the compression molding tip 112 of the molding punch portion 110, and the counter groove portion 221 of the counter die portion 220. ) It may also be formed to have a second width W2 so that the counter punch part 210 can be accommodated.

Here, as an example, the counter groove portion 221 of the counter punch portion 210 and the counter die portion 220 is formed to have the same second width W2, but this means that the theoretical design dimensions are the same, and in practical terms, As a result, a fine dimensional difference may occur as much as the tolerance for adjusting the clearance between the counter groove portion 221 and the counter punch portion 210.

Accordingly, as shown in FIGS. 6 to 8, the counter punch unit 210 moves in a direction opposite to the compression molding direction of the compression burr B by the compression molding tip 112 of the molding punch portion 110. By striking the compression burr (B), the compression burr (B) can be removed from the shear portion 11 of the plate material 10.

Therefore, according to the press forming apparatus 1000 according to an embodiment of the present invention, the step-shaped forming punch unit 110 with a step portion 113 formed on the end side penetrating the plate material 10 In the shear forming process of the plate 10, the edge portion of the shear portion 11 of the plate 10 is compression molded to generate a compression burr (B), and then the compression burr (B) is formed using the counter punch unit 210. ) by striking in a direction opposite to the direction of compression, the compression burr B can be easily removed from the shear surface 11a.

In this way, during the shear forming process of the plate 10, the compression burr B is intentionally applied to the shear portion 11 of the plate 10 by the step-shaped forming punch 110 with the step portion 113 formed thereon. By generating the compressive stress, the thickness of the burr can be reduced, the occurrence of roll-over on the shear surface 11a of the plate 10 can be suppressed, and the compression accumulated in the compression burr B can be suppressed. The compression burr (B) can be easily and cleanly removed by hitting the counter punch portion 210 due to stress.

Figure 9 is a cross-sectional view schematically showing the shear forming part 100 and the counter forming part 200 of the press forming apparatus 2000 according to another embodiment of the present invention, and Figures 10 to 15 are the shear forming part of Figure 9. These are cross-sectional views showing step by step the process of shear forming the plate 10 by the unit 100 and the counter forming unit 200 and the process of removing the compression burr (B) generated on the shear surface (11a).

First, as shown in FIG. 9, the front molding portion 100 and the counter molding portion 200 may be formed in one mold in the same stage process.

For example, as shown in FIG. 9, the shear forming part 100 is installed on the upper mold of the forming mold on which the plate 10 is supported, and at least a portion of the end penetrates the plate 10 by a downward movement. , a forming punch unit 110 for shearing and forming at least a portion of the plate 10, and a forming punch unit 110 formed opposite the forming punch unit 110 to support the plate 10, and installed on the lower mold of the forming mold. , a molding die portion 120 in which a molding groove 121 is formed so that at least a portion of the end of the molding punch portion 110 penetrating the plate 10 can be inserted, and the plate 10 is formed in the upper mold of the mold. It is installed on one side of the forming punch unit 110 to face the forming die unit 120, and when the forming punch unit 110 shears and forms the plate 10 or the counter punch unit 210 uses a compression burr ( When B) is removed, it may include a molded blank holder portion 130 that presses and holds one side of the plate 10.

In addition, the counter molding portion 200 is installed in the molding groove portion 121, and at least a portion of the end penetrates the shear portion 11 of the plate material 10 due to the upward movement, and the shear surface of the plate material 10 ( It may include a counter punch unit 210 to remove the compression burr (B) generated in 11a).

Here, the forming punch part 110 and the forming blank holder part 130 are installed on the upper mold of the forming mold and move downward toward the upper surface of the sheet material 10, and the forming die part 120 and the counter punch part 210 is installed on the lower mold of the forming mold to support the lower surface of the plate 10 and move upward toward the compression burr B. However, it is not necessarily limited to FIG. 9, and the forming punch unit (110) and the forming blank holder part 130 are installed on the lower mold of the forming mold and move upward toward the lower surface of the sheet material 10, and the forming die part 120 and the counter punch part 210 are, It may be installed on the upper mold of the forming mold to support the upper surface of the plate 10 and move downward toward the compression burr (B).

As shown in FIGS. 9 to 15, the forming punch unit 110 is formed at a first width W1 at the end of the forming punch unit 110 so as to penetrate the forming area of the plate 10. Based on the direction of movement of the shear forming tip 111 and the forming punch unit 110 for shear forming of the plate 10, a step portion 113 is formed at the rear of the shear forming tip 111, and the shear forming tip 111 is formed. When the forming tip 111 penetrates the plate 10 and shears the plate 10, a second width W1 larger than the first width W1 is formed so that at least a portion of the edge of the shear area 11 can be compression molded. It may be composed of a compression molded tip 112 formed with a width W2.

In addition, the counter punch unit 210 is formed with a second width W2 that is the same as the width of the compression molding tip 112 of the forming punch unit 110, but is formed in a hollow shape and is installed in the forming groove 121. When shearing the plate 10, the hollow portion 211 is set to the first width W1 so that only the shear forming tip 111 of the forming punch 110 can be inserted into the hollow portion 211. can be formed.

Here, as an example, the forming punch part 110, the shear forming tip 111, and the hollow part 211 of the counter punch part 210 are formed to have the same first width W1, but this is a theoretical design dimension. This means that is the same, in reality, a fine dimensional difference equal to the tolerance for adjusting the clearance between the hollow portion 211 of the counter punch unit 210 and the shear forming tip 111 may occur.

Accordingly, as shown in FIGS. 10 to 12, the forming punch unit 110 is formed at the rear of the shear forming tip 111 by the compression forming tip 112 during shearing processing of the plate 10. The jaw portion 113 compresses and molds the edge portion of the shear portion 11 of the plate 10 supported by the upper surface of the counter punch portion 210 to generate a compression burr B on the lower side of the shear portion 11. You can do it.

Subsequently, as shown in FIGS. 13 to 15, the counter punch unit 210 is compressed in a direction opposite to the compression molding direction of the compression burr B by the compression molding tip 112 of the molding punch portion 110. By hitting the burr (B), the compression burr (B) can be removed from the shear portion 11 of the plate 10.

Therefore, according to the press forming apparatus 2000 according to another embodiment of the present invention, the step-shaped forming punch unit 110 with a step portion 113 formed on the end side penetrating the plate material 10 , In the shear forming process of the plate 10, the edge portion of the shear portion 11 of the plate 10 is compression molded to generate a compression burr (B), and then the counter punch unit 210 installed in the same stage process is used. By hitting the compression burr (B) in a direction opposite to the direction of compression, the compression burr (B) can be easily removed from the shear surface (11a).

In this way, during the shear forming process of the plate 10, the compression burr B is intentionally applied to the shear portion 11 of the plate 10 by the step-shaped forming punch 110 with the step portion 113 formed thereon. By generating the compressive stress, the thickness of the burr can be reduced, the occurrence of roll-over on the shear surface 11a of the plate 10 can be suppressed, and the compression accumulated in the compression burr B can be suppressed. The compression burr (B) can be easily and cleanly removed by hitting the counter punch portion 210 due to stress.

Therefore, according to the press forming devices (1000, 2000) according to various embodiments of the present invention, it is possible to secure a high-quality shear forming surface with few burrs or internal cracks in the shear forming process in which high-strength steel sheets are applied, and high-quality shear forming surface is possible. By securing the molding surface, it is possible to suppress the occurrence of breakage of the product in the post-process, which can have the effect of increasing the quality and yield of the final product.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims.

10: plate
11: Shear area
11a: Shear section
100: Shear forming part
110: Forming punch unit
111: Shear forming tip
112: Compression molding tip
113: Stepped part
120: Molded die part
121: Molding groove
130: Molded blank holder part
200: Counter molding part
210: Counter punch unit
211: hollow part
220: Counter Daibu
221: Counter Home Department
230: Counter blank holder part
1000, 2000: Press forming device
B: compression burr

Claims (19)

A shear molding portion including a molding punch portion installed to be able to move up and down toward the plate, and shearing and forming at least a portion of the plate by lowering or raising the molding punch portion that passes through the plate. and
A counter punch unit is installed to be able to be raised and lowered toward the plate in a direction opposite to the raising and lowering direction of the forming punch unit, and passes through a front end portion of the plate. By raising or lowering the counter punch unit, the forming punch unit It includes a counter forming part that removes compression burrs generated on the shear surface of the plate during the shear forming process,
The forming punch part,
A press forming device that is formed to have a stepped portion on an end side penetrating the plate, and generates the compression burr by compression molding at least a portion of an edge portion of the shear portion by the stepped portion during shear processing of the plate. . According to claim 1,
The shear forming part and the counter forming part,
A press forming device that is formed sequentially along the transfer direction of the sheet in one progressive mold or individually formed in different single molds so that it can be formed in a separate stage process. According to claim 2,
The shear molding part,
The forming punch part is installed on the upper or lower mold of the forming mold in which the sheet material is supported, and at least a portion of an end penetrates the sheet material through a downward or upward movement to shear and form at least a portion of the sheet material; and
A forming groove is formed to face the forming punch part and is installed on the lower mold or the upper mold of the forming mold so as to support the sheet material, and allows at least a portion of the end of the forming punch part that penetrates the sheet material to be inserted. A molding die portion in which the portion is formed;
Including, press forming device. According to claim 3,
The forming punch part,
a shear forming tip formed at a first width at an end of the forming punch unit so as to penetrate the forming area of the plate; and
Based on the direction of movement of the forming punch for shear forming of the sheet, the step is formed at the rear of the shear forming tip, so that the shear forming tip penetrates the sheet and during shearing of the sheet, the shear area a compression molding tip formed with a second width larger than the first width so as to compression mold at least a portion of the edge portion of;
Including, press forming device. According to claim 4,
The forming die part,
A press forming apparatus wherein the forming groove is formed to the first width so that only the front forming tip portion of the forming punch can be inserted into the forming groove. According to claim 4,
The forming punch part,
When shearing the plate, the step formed at the rear of the shear molding tip by the compression molding tip compresses and molds the edge of the shear portion of the plate supported by the upper surface of the edge of the molding groove, A press forming device that generates the compression burr below or above the shear area. According to claim 3,
The shear molding part,
The upper mold or the lower mold of the molding mold is installed on one side of the molding punch portion to face the molding die portion with the plate material in between, so that the molding punch portion presses one side of the plate material when shearing and molding the plate material. A molded blank holder portion for holding;
Further comprising a press forming device. According to claim 2,
The counter molding part,
The plate sheared in the shear molding unit is installed on the lower mold or the upper mold of the supported molding mold, and at least a portion of the end penetrates the shear portion of the plate due to an upward or downward movement, and the shear surface of the plate material The counter punch unit for removing the compression burr generated in; and
a counter die part installed on the lower mold or the upper mold of the forming mold to support the plate, and having a counter groove formed to accommodate the counter punch part;
Including, press forming device. According to claim 8,
The counter punch unit,
A press molding device formed with a second width equal to the width of the compression molding tip of the molding punch portion. According to claim 8,
The counter punch unit,
A press forming apparatus, wherein the compression burr is removed from the shear portion of the sheet material by hitting the compression burr in a direction opposite to the direction of compression molding of the compression burr by the compression molding tip of the molding punch unit. According to claim 8,
The counter molding part,
A counter blank holder portion that is installed to face the counter die portion in the upper mold or lower mold of the forming mold with the plate material in between, and presses and holds one side of the plate material when the counter punch section removes the compression burr. ;
Further comprising a press forming device. According to claim 1,
The shear forming part and the counter forming part,
Press forming device, formed within the same stage process in one forming mold. According to claim 12,
The shear molding part,
The forming punch part is installed on the upper or lower mold of the forming mold supporting the sheet material, and has at least a portion of an end penetrating the sheet material through a downward or upward movement, thereby shearing and forming at least a portion of the sheet material; and
A forming groove is formed to face the forming punch part and is installed on the lower mold or the upper mold of the forming mold so as to support the sheet material, and allows at least a portion of the end of the forming punch part that penetrates the sheet material to be inserted. It includes a molding die portion in which the portion is formed,
The counter molding part,
The counter punch part is installed in the forming groove, and has at least a portion of an end penetrating the shear portion of the plate by an upward or downward movement to remove the compression burr generated on the shear surface of the plate;
Including, press forming device. According to claim 13,
The forming punch part,
a shear forming tip formed at a first width at an end of the forming punch unit so as to penetrate the forming area of the plate; and
Based on the direction of movement of the forming punch for shear forming of the sheet, the step is formed at the rear of the shear forming tip, so that the shear forming tip penetrates the sheet and during shearing of the sheet, the shear area a compression molding tip formed with a second width larger than the first width so as to compression mold at least a portion of the edge portion of;
Including, press forming device. According to claim 14,
The counter punch unit,
A press is formed in a hollow shape and installed in the forming groove, and the hollow part is formed to the first width so that only the shear forming tip portion of the forming punch part can be inserted into the hollow part when shearing the sheet material. Forming device. According to claim 14,
The forming punch part,
During shear processing of the plate, the step formed at the rear of the shear molding tip by the compression molding tip compresses and molds the edge portion of the shear portion of the plate supported by the upper surface of the counter punch portion, A press forming device that generates the compression burr on the lower or upper side of. According to claim 13,
The shear molding part,
The upper mold or the lower mold of the mold is installed on one side of the molding punch portion to face the molding die portion with the plate material interposed between them, and the molding punch portion is used to shear and mold the plate material or the counter punch portion is used to press the compression burr. When removing, a molded blank holder portion that presses and holds one side of the plate;
Further comprising a press forming device. According to claim 15,
The counter punch unit,
A press molding device formed with a second width equal to the width of the compression molding tip of the molding punch portion. According to claim 15,
The counter punch unit,
A press forming apparatus, wherein the compression burr is removed from the shear portion of the sheet material by hitting the compression burr in a direction opposite to the direction of compression molding of the compression burr by the compression molding tip of the molding punch unit.

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