KR102459241B1 - Multi-shear angular type press apparatus - Google Patents

Abstract

The present invention relates to a multi-shear angle-type press device that enables hole processing at various shear angles without the need to replace a mold, comprising: a mold on which a disc is seated and a first hole and a second hole are formed; a blank holder for pressing a portion of the disc and fixing it to the mold; and at least one punch penetrating through the blank portion of the disk and penetrating the first hole or the second hole of the mold so that a hole is formed in the disk. a flat portion formed around the first hole portion so as to flatly fix the peripheral portion at a reference angle; and a first inclined surface portion formed around the second hole to be inclined to fix the blank peripheral portion of the disk at a first shear angle based on the reference angle.

Description

Multi-shear angular type press apparatus

The present invention relates to a multi-shear angle press apparatus, and more particularly, to a multi-shear angle press apparatus that enables hole processing at various shear angles without the need to replace a mold.

In recent years, environmental and fuel efficiency regulations and safety standards are being strengthened in the automobile industry, and the application rate of ultra-high-strength steel sheets is steadily increasing in order to satisfy these various standards.

In the case of ultra-high-strength steel sheet, instead of increasing the strength of the steel sheet, dimensional defects due to fracture and springback occur frequently due to a decrease in elongation.

Such deterioration of the shear surface quality includes the occurrence of irregular brittle fracture surfaces and excessive chipping, mold damage due to high shear load, and burrs at the trim end.

In the past, it was possible to control the shear angle of the hole trim to improve the quality of the hole front surface, reduce the mold load, and give the material shape.

That is, in the past, it was possible to reduce the shear load and reduce vibration and noise by installing the mold at an inclined shear angle.

However, in the conventional molds capable of evaluating shear angles to which such shear angles are applied, the molds had to be individually manufactured for each shear angle, and these molds had to be replaced as needed. , there were many problems such as frequent mold replacement time, which greatly wastes cost and time.

Korean Patent Application No. 10-2016-0077426

The present invention is to solve various problems including the above problems, and forms a flat part, an inclined surface part, and a writing part so that a hole can be processed at various shear angles in a single mold, so that various shearing parts are formed without replacing the mold. Since the original plate can be holed at an angle, mold manufacturing cost and mold replacement time can be greatly reduced, mold durability deterioration and material deformation can be prevented due to mold replacement or form-type mold application. To provide a multi-shear angle press device that can firmly fix the original plate by forming The purpose. However, these problems are exemplary, and the scope of the present invention is not limited thereto.

Multiple shear angle type press apparatus according to the spirit of the present invention for solving the above problems, a mold on which the disc is seated, the first hole portion and the second hole portion are formed; a blank holder for pressing a portion of the disc and fixing it to the mold; and at least one punch penetrating through the blank portion of the disk and penetrating the first hole or the second hole of the mold so that a hole is formed in the disk. a flat portion formed around the first hole portion so as to flatly fix the peripheral portion at a reference angle; and a first inclined surface portion formed around the second hole to be inclined to fix the blank peripheral portion of the disk at a first shear angle based on the reference angle.

In addition, according to the present invention, the mold is formed with a third hole, and the mold can fix the blank periphery of the disk at a second shear angle larger than the first shear angle based on the reference angle. It may further include; a second inclined surface portion formed around the third hole portion.

In addition, according to the present invention, the punch may include: a first punch corresponding to the first hole; a second punch corresponding to the second hole; and a third punch corresponding to the third hole.

In addition, according to the present invention, the mold may include: a first writing portion formed between the flat portion and the first inclined surface portion and inclined at a first intermediate angle between the reference angle and the first shear angle; and a second writing part formed between the flat part and the second inclined surface part and inclined at a second intermediate angle between the reference angle and the second shear angle.

Further, according to the present invention, the first shear angle may be 3 degrees to 7 degrees, and the second shear angle may be 8 degrees to 12 degrees.

In addition, according to the present invention, the mold may have an uneven surface (Texture) formed on the surface to increase the frictional force with the original plate.

In addition, according to the present invention, an alignment guide installed around the mold so that the disk can be seated in the correct position of the mold; may further include.

In addition, according to the present invention, a friction force measuring sensor for measuring the friction force between the mold and the disc; and a load correction unit for correcting the load value of the press by using the friction force signal measured from the friction force measuring sensor.

In addition, according to the present invention, the original plate may be an ultra-high tensile strength steel plate.

Further, according to the present invention, the disc may be heated so that it can be hot pierced.

According to some embodiments of the present invention made as described above, a flat plate, inclined surface parts, and written parts are formed so that holes can be machined at various shear angles in a single mold, and the disc can be formed at various shear angles without replacing the mold. can process holes, greatly reducing mold manufacturing cost and mold replacement time, preventing mold durability deterioration and material deformation caused by mold replacement or application of form-type molds, and forming uneven surfaces in the mold The original plate can be firmly fixed, and the written part can be formed in the angular inflection area to prevent the disc from being caught or moved, and it has the effect of being applicable to hot piercing. Of course, the scope of the present invention is not limited by these effects.

1 is a cross-sectional view showing a multi-shear angle press apparatus according to some embodiments of the present invention.
2 is a cross-sectional view showing a hole processing state of the multiple shear angle type press apparatus of FIG. 1 .
3 is a plan view showing a mold of the multi-shear angle press apparatus of FIG. 1 .
4 is a perspective view showing the multi-shear angle press apparatus of FIG. 1 .

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

Examples of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and the scope of the present invention is as follows It is not limited to an Example. Rather, these embodiments are provided so as to more fully and complete the present disclosure, and to fully convey the spirit of the present invention to those skilled in the art. In addition, in the drawings, the thickness or size of each layer is exaggerated for convenience and clarity of description.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically illustrating ideal embodiments of the present invention. In the drawings, variations of the illustrated shape can be envisaged, for example depending on manufacturing technology and/or tolerances. Accordingly, embodiments of the inventive concept should not be construed as limited to the specific shape of the region shown in the present specification, but should include, for example, changes in shape caused by manufacturing.

1 is a cross-sectional view showing a multi-shear angle press apparatus 100 according to some embodiments of the present invention.

First, as shown in Figure 1, the multi-shear angle-type press apparatus 100 according to some embodiments of the present invention is to largely include a mold 10, a blank holder 20 and a punch (P). can

For example, as shown in FIG. 1 , the mold 10 has a disc 1 seated thereon, and a first hole part H1 , a second hole part H2 , and a third hole part H3 are formed on the upper surface of the mold 10 . As a kind of block body to be formed, it may be a lower mold positioned below the punch (P).

However, the mold 10 is not necessarily limited to the lower mold, and all molds of a wide variety of shapes, such as being applied to the upper mold, or applied to the left or right mold, or the core mold, may be applied.

In addition, the first hole portion H1, the second hole portion H2, and the third hole portion H3 are not necessarily limited to the drawings below, and may be formed in a variety of shapes other than a circular shape as needed.

More specifically, for example, as shown in FIG. 1 , the mold 10 has a blank periphery of the disc 1 so that the disc 1 can be hole-processed at various shear angles without replacement of the mold. A flat portion M1 formed around the first hole H1 so as to be flatly fixed at a reference angle, and a blank peripheral portion of the disk 1 at a first shear angle K1 based on the reference angle A first inclined surface portion (M2) formed around the second hole portion (H2) and a blank peripheral portion of the disk (1) formed around the second hole portion (H2) so as to be fixed in an inclined manner, the first shear angle (K1) larger than the first shear angle (K1) based on the reference angle It may include a second inclined surface portion (M3) formed around the third hole portion (H3) to be fixed at the second shear angle (K2).

Here, for evaluation and testing according to various shear angles of the first hole, the second hole, and the third hole formed in the disk 1 without replacing the mold, the first shear angle K1 is 3 degrees to 7 degrees and the second shear angle K2 may be 8 degrees to 12 degrees.

However, the first shear angle K1 and the second shear angle K2 are not necessarily limited thereto, and various combinations of shear angles necessary for evaluation and testing of the original plate 1 may be applied.

In addition, for example, as shown in FIG. 1 , the mold 10 has the flat portion M1 and the first inclined surface portion M2 so as to prevent movement of the original plate 1 during press pressure. The first writing portion C1 formed between the reference angle and the first intermediate angle J1 between the first shear angle K1 and the first writing portion C1 and the flat portion M1 and the second inclined surface portion are formed It may further include a second writing portion (C2) formed between (M3) and inclined at a second intermediate angle (J2) between the reference angle and the second shear angle (K2).

Accordingly, the disk 1 is formed between the flat portion M1 and the first standing portion C1, between the first standing portion C1 and the first inclined surface portion M2, and the flat portion M1. An inflection line is respectively formed between the second writing part C2 and the second writing part C2 and the second inclined surface part M3, and these inflection lines are each part of the disc 1 It is possible to prevent the movement of the original plate (1) during press pressing by firmly fixing the.

Here, the mold 10 may have an uneven surface (T) (Texture) formed on the surface to increase the frictional force with the original plate (1) so as to more firmly fix the original plate (1). have.

Accordingly, the disc 1 can be more firmly fixed by the uneven surface T, and the quality of hole processing can be greatly improved.

Here, the original plate 1 may be an ultra-high-strength steel plate required to determine the shear angle, and it is also possible to be heated in advance by a melting furnace or a heater so that it can be hot-pierced.

In addition, for example, as shown in FIG. 1 , the blank holder 20 is a kind of block body that presses a part of the disk 1 to fix it to the mold 10 , and together with the mold 10 . It may serve to firmly fix the disc 1 by a pressing force.

Here, the shape of the blank holder 20 may be formed to correspond to the shape of the mold 10 described above.

In addition, for example, as shown in FIG. 1 , the punch (P) penetrates the blank portion of the disk (1) to form a hole in the disk (1). As a kind of cutting tool that penetrates into the first hole (H1) or the second hole (H2), the punch (P), the first punch (P1) corresponding to the first hole (H1), and the second A second punch P2 corresponding to the hole portion H2 and a third punch P3 corresponding to the third hole portion H3 may be included.

Here, the first punch (P1), the second punch (P2), and the third punch (P3) are installed interchangeably with a press (not shown), and may be installed or removed as needed. .

2 is a cross-sectional view showing a hole processing state of the multi-shear angle press apparatus 100 of FIG. 1 .

Accordingly, as shown in FIG. 2 , the user forms a first hole in the disk 1 in a flat state without a shearing angle using the flat portion M1 of the mold 10 , or A second hole is formed in the disk 1 at a first shear angle K1 using the inclined surface portion M2, or a third hole is simultaneously or partially formed in the disk using the second inclined surface portion M3. can be formed with

Therefore, the user can designally set the optimal shear angle suitable for the material of the original plate 1 by evaluating and testing the first, second, and third holes processed at various shear angles without changing the mold. have.

On the other hand, as shown in Figure 2, the multiple shear angle type press apparatus 100 according to some embodiments of the present invention, a friction force measuring sensor for measuring the friction force between the mold 10 and the disc 1 ( 40) and a load correction unit 41 for correcting the load value of the press using the friction force signal measured from the friction force measuring sensor 40 may be further included.

Therefore, during evaluation and testing of the original plate 1, the friction force acting on the original plate 1 can be measured using the friction force measuring sensor 40, and this can be reflected in mold design or process design. The load value of the press may be corrected using the friction force signal measured from the friction force measuring sensor 40 using the load correction unit 41 .

3 is a plan view showing the mold 10 of the multiple shear angle type press apparatus 100 of FIG. 1 , and FIG. 4 is a perspective view showing the multiple shear angle type press apparatus 100 of FIG. 1 .

As shown in FIGS. 1 to 4 , the multi-shear angle press apparatus 100 according to some embodiments of the present invention is such that the disc 1 can be seated in the correct position of the mold 10 . An alignment guide 30 installed around the mold 10 may be further included.

Therefore, by limiting the edge position of the disc 1 using the alignment guide 30, the disc 1 is aligned in the correct position and at the same time, when pressing, the disc 1 is prevented from moving or deformed. can do.

Therefore, according to the present invention, the flat portion M1, the inclined surface portions M2 (M3) and the writing portions (C1) (C2) are formed so that the hole can be processed at various shear angles in one mold 10 . As a result, the original plate 1 can be holed at various shear angles without changing the mold, greatly reducing the mold manufacturing cost and mold replacement time. It is possible to prevent the phenomenon, and by forming the uneven surface (T) on the mold (10), the original plate (1) can be firmly fixed, and by forming the writing parts (C1) (C2) at the angle inflection part, It can prevent jamming or movement, and can be applied to hot piercing.

Although the present invention has been described with reference to the embodiment shown in the drawings, which is only exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

1: Disc
10: mold
H1: first hole
H2: second hole
H3: third hole
20: blank holder
P: punch
P1: 1st punch
P2: 2nd punch
P3: 3rd Punch
M1: flat part
M2: first inclined surface portion
M3: second inclined surface portion
K1: first shear angle
K2: second shear angle
C1: First written part
C2: Second written part
J1: first intermediate angle
J2: second intermediate angle
T: Concave-convex surface
30: alignment guide
40: friction force measuring sensor
41: load compensation unit
100: multiple shear angle type press device

Claims (10)

a mold on which the disc is seated, the first hole portion and the second hole portion are formed;
a blank holder for pressing a portion of the disc and fixing it to the mold; and
At least one punch penetrating through the blank portion of the disk and penetrating into the first hole or the second hole of the mold so that a hole is formed in the disk.
The mold is
a flat portion formed around the first hole portion so as to flatly fix the blank peripheral portion of the disk at a reference angle; and
A first inclined surface portion formed around the second hole to be inclined to fix the blank periphery of the disk at a first shear angle based on the reference angle;
The mold is formed with a third hole,
The mold is
a second inclined surface portion formed around the third hole portion so as to fix the blank periphery of the disk at a second shear angle greater than the first shear angle based on the reference angle; and
The mold is
a first writing portion formed between the flat portion and the first inclined surface portion and inclined at a first intermediate angle between the reference angle and the first shear angle; and
a second writing portion formed between the flat portion and the second inclined surface portion and inclined at a second intermediate angle between the reference angle and the second shear angle;
Including, multiple shear angle type press device. delete The method of claim 1,
The punch is
a first punch corresponding to the first hole;
a second punch corresponding to the second hole; and
a third punch corresponding to the third hole;
Including, multiple shear angle type press device. delete The method of claim 1,
The first shear angle is 3 degrees to 7 degrees, and the second shear angle is 8 degrees to 12 degrees, a multiple shear angle type press apparatus. The method of claim 1,
The mold is a multi-shear angle press device in which an uneven surface (Texture) is formed on the surface to increase the frictional force with the original plate. The method of claim 1,
an alignment guide installed around the mold so that the disk can be seated in the correct position of the mold;
Further comprising a, multiple shear angle type press device. The method of claim 1,
a friction force measuring sensor for measuring the friction force between the mold and the disk; and
a load correction unit for correcting the load value of the press using the friction force signal measured from the friction force measuring sensor;
Further comprising a, multiple shear angle type press device. The method of claim 1,
The original plate is an ultra-high-strength steel plate, a multi-shear angle press device. The method of claim 1,
The disc is heated so that it can be hot pierced, a multiple shear angle type press apparatus.

Images