KR101579531B1 - Bending device - Google Patents

Abstract

A bending apparatus is disclosed. The bending apparatus includes a bending die for bending and shaping both ends of a curved forming beam having a predetermined curvature formed by a roll forming process, a bending die installed upright on the base, and a plurality of bending dies provided between the both ends of the curved forming beam, A left and a right mold for fixing a curved portion to both ends of the molding beam, and a bending die corresponding to the left and right molds, respectively, which are fixed to the bending die at both sides of the center mold, A rotary cylinder in which one end is hinged to both the rotary frames and the other end is hinged to the base; and a bending unit for bending corresponding to the center mold between the two rotary frames, The mold is mounted on the die so as to be reciprocatable in the vertical direction, And both ends of the curved forming beam are pressed and bent along the curvature of the left and right molds in contact with both ends of the curved forming beam at the time of rotation of the both rotating frames A forming roll.

Description

[0001] BENDING DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus, and more particularly, to a bending apparatus of a roll bending type capable of bending molding both ends of a formed beam having a predetermined curvature.

Generally, the bending facility is for bending a beam with a constant curvature. In particular, it is also applied to bending a straight formed beam formed through a roll forming process, such as a bumper beam for a vehicle, with a certain curvature.

That is, the bending equipment forms a curved forming beam having a predetermined curvature by bending a straight beam. Here, the straight beam has a top surface and a bottom surface with respect to the front surface, a concave portion is formed at the center of the front surface to reinforce rigidity, and is applied to a bumper beam of a large truck having a relatively wide width as compared with a bumper beam applied to a general passenger vehicle .

On the other hand, such a bending apparatus has a stretch bending machine which can increase the dimensional accuracy of the formed curvature by controlling the stiffness and springback by bending the bending die having a certain shape while pulling both ends of the high-strength forming beam having a relatively large width. For example.

The stretch bending machine is formed by bending a straight formed beam at a certain curvature in such a manner that a straight formed beam is inserted into a formed beam rail and both ends of the straight formed beam are pulled as hydraulic pressure in a state where the straight formed beam is clamped through left and right, can do.

On the other hand, when a molding force of a curved line curved with a certain curvature is mounted on a vehicle as a bumper beam, interference occurs at both ends of the formed beam with the vehicle body. have.

In order to form the curvilinear shaped end curvature beam, the linearly formed beam is formed through roll forming, the straightly formed beam is bent and formed into a curved forming beam through a stretch bending machine, .

However, in this case, since the longitudinal deformation of the formed beam occurs due to the stretching bending force, the development of a bending machine capable of bending the both ends of the curved forming beam with a certain curvature with a simple structure without using a stretch bending machine .

The matters described in the background section are intended to enhance the understanding of the background of the invention and may include matters not previously known to those skilled in the art.

Embodiments of the present invention provide a bending apparatus of a roll bending type in which both ends of a shaped beam molded with a certain curvature can be bent and formed in a simple configuration to impart a secondary curvature to both ends of the formed beam.

A bending apparatus according to an embodiment of the present invention is a bending apparatus for bending and forming both ends of a curved forming beam which is formed by roll forming at a predetermined curvature and includes a bending die installed upright on a base, A center mold for supporting between the end portions of the curved forming beam and a left and right mold for fixing a constant curvature to both ends of the forming beam at both sides of the center mold and fixed to the bending die, A pair of left and right rotating mold frames provided on the bending die, the pair of right and left rotating frames being rotatably mounted on both sides of the center mold, the pair of frames being hinged to the both rotating frames, A rotating cylinder coupled to the rotating frame, A pressing mold which is installed on the die so as to reciprocate upward and downward and which presses the curved forming beam on the central mold; and a pressing mold which is rotatably mounted on the both rotating frames, And a forming roll for rolling and bending both ends of the curved forming beam along the curvatures of the left and right molds.

Further, in the bending apparatus according to the embodiment of the present invention, the press mold may be connected to a pressurizing cylinder fixed to the bending die.

In addition, in the bending apparatus according to an embodiment of the present invention, the both-side rotating frame may be rotatably installed on the bending die through a rotating shaft, and the rotating shaft may be installed on the bending die through a bearing.

Further, in the bending apparatus according to the embodiment of the present invention, a guider for guiding the both-side rotating frame may be installed on both sides of the upper portion of the bending die corresponding to the both-side rotating frame.

The embodiment of the present invention can bend both ends of a curved forming beam formed with a certain curvature in a roll bending method with a simple configuration and form the curved forming beam at both ends with a secondary curvature at both ends, And the initial investment cost can be reduced.

In addition, in the embodiment of the present invention, the curved forming beam formed with a certain curvature through the roll forming forming step is formed into the both end curvature forming beams having the secondary curvature at both ends, so that the number of the bending equipments can be minimized, The production time can be shortened.

These drawings are for the purpose of describing an exemplary embodiment of the present invention, and therefore the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 is a front view showing a bending apparatus according to an embodiment of the present invention.
FIGS. 2 to 4 are views showing steps of bending molding a forming beam using the bending apparatus according to the embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

In the following detailed description, the names of components are categorized into the first, second, and so on in order to distinguish them from each other in the same relationship, and are not necessarily limited to the order in the following description.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

It should be noted that terms such as " ... unit ", "unit of means "," part of item ", "absence of member ", and the like denote a unit of a comprehensive constitution having at least one function or operation it means.

1 is a front view showing a bending apparatus according to an embodiment of the present invention.

1, a bending apparatus 100 according to an embodiment of the present invention includes a high-strength curved forming beam B1 (see FIGS. 2 and 3) formed by forming a high-strength steel sheet through a roll forming process like a bumper beam for a vehicle, (See Fig. 4 below) in which both ends of the curved forming beam B1 are bend-molded by the roll pressing method and the secondary curvature is given to both ends of the curved forming beam B1.

The secondary curvature forming beam B2 has a top surface and a bottom surface with respect to the front surface, and a concave portion is formed at the center of the front surface to reinforce rigidity. The curvature forming beam B2 has a relatively wide width It can be applied to a bumper beam of a heavy truck.

The bending apparatus 100 according to the embodiment of the present invention basically includes a bending die 10 as a device frame. The bending die 10 may be installed upright on the base 1.

The bending die 10 is a frame that supports various components to be described below, in which all the components are installed in one frame, and the components are configured in a frame in which the components are separated from each other.

Such bending dies 10 are made up of various blocks, protrusions, collar, plates, brackets, etc., which are elements for supporting the respective components, and are therefore referred to as bending dies 10 except in exceptional cases .

The bending apparatus 100 according to the embodiment of the present invention is a mold unit for bending both ends of the curved forming beam B1 to form the both end curvature forming beams B2, And the left and right dies 30,

The center mold 20 is fixed to the front center of the bending die 10. The central mold 20 supports between the end portions of the curved forming beam B1 and has a first curvature surface 21 formed on the upper surface thereof for supporting a space between both ends of the curved forming beam B1 have.

The left and right molds 30 and 40 are fixed to the bending die 10 on both sides of the center mold 20 therebetween. Second and third curved surfaces 31 and 41 are formed on the upper surfaces of the left and right dies 30 and 40 to support both ends of the curved forming beam B1 and to impart a predetermined curvature to both ends of the curved forming beam B1 .

The first curvature surface 21 of the center mold 20 and the second and third curvature surfaces 31 and 41 of the left and right molds 30 and 40 are connected to each other and the two curvature forming beams B2.

In the bending die 10 corresponding to the left and right molds 30 and 40 described above, both sides (left and right sides in the drawing) of the rotating frame 20 installed to be rotatable on both left and right sides around the center mold 20 (50).

The two side rotating frames 50 are rotatably installed on the bending die 10 through the rotating shaft 51 and the rotating shaft 51 is installed on the bending die 10 through the bearings 52.

The bending apparatus 100 according to an embodiment of the present invention includes a rotary cylinder 60 for rotating the both side rotary frames 50 in the left and right directions about the center mold 20 ).

The rotary cylinder 60 is operated by hydraulic or pneumatic pressure and one end of the rotary cylinder 60 is hinged to both the rotary frames 50 and the other end of the rotary shaft 60 is hinged to both sides of the base 1 .

A pressing die 70 reciprocating in the vertical direction with respect to the central mold 20 is provided between the two side rotating frames 50.

The pressing die 70 presses the center portion between the center mold 20 and the curved forming beam B1 placed on the left and right dies 30 and 40. The bending die 10 And is vertically movable with respect to the central mold 20 through a fixed pressurizing cylinder 80.

At this time, the pressurizing cylinder 80 can be connected to the press mold 70 through the operation rod 81. A curved surface curved inward is formed on the lower surface of the press mold 70 in correspondence with the curvature of the central mold 20.

On the other hand, a forming roll R is provided in each of the side rotating frames 50 corresponding to between the center mold 20 and the left and right molds 30, 40. At this time, the forming rolls R are rotatably mounted on the rotating frame 50 through the roll shaft S.

The forming roll R rotates in contact with both ends of the curved forming beam B1 at the time of rotation of the both side rotating frames 50 and rotates along the curvature of the left and right molds 30 and 40, Both ends are roll-bended.

On the other hand, on both sides of the upper portion of the bending die 10 corresponding to the both-side rotary frames 50, guiders 90 for guiding the both-side rotary frames 50 are installed.

Hereinafter, the operation of the bending apparatus 100 according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 2 to 4 are views showing steps of bending molding a forming beam using the bending apparatus according to the embodiment of the present invention.

2, in the embodiment of the present invention, the press forming die 70 is moved upward by the backward movement of the pressurizing cylinder 80, and the curved forming beam B1 is transferred to the center mold 20 and the left 31, and 41 of the right and left molds 30 and 40, respectively.

Here, in the embodiment of the present invention, the curved forming beam B1 is set between the center mold 20 and the left and right molds 30 and 40 and the forming roll R on the front side of both side rotary frames 50 . At this time, the both-side rotary frame 50 is kept vertically upright on both sides of the pressing mold 70, and the rotary cylinder 60 is in a state in which its operating rod 61 is retracted have.

After this process, in the embodiment of the present invention, the pressurizing die 70 is moved downward by the advancing operation of the pressurizing cylinder 80 as shown in Fig. The press mold 70 descends toward the center mold 20 between the both side rotary frames 50 and presses and fixes the center portion of the curved forming beam B1 set on the center mold 20.

Then, in the embodiment of the present invention, as shown in FIG. 4, the operation rod 61 of the rotary cylinder 60 is advanced. Thus, the both-side rotary frames 50 are rotated in the left-right direction (away from each other) about the center mold 20. The two side rotating frames 50 can be rotated in the left and right directions while being guided by the guider 90.

In this case, the forming roll R rotates in contact with both ends of the curved forming beam B1 (see Fig. 3) at the time of rotation of the both-side rotating frame 50 and rotates along the curvature of the left and right molds 30 and 40 Both ends of the curved forming beam B1 are roll-press bend.

Therefore, in the embodiment of the present invention, both ends of the curved forming beam B1 are bent along the curvatures of the left and right molds 30 and 40 as the rotational force of the both-side rotary frame 50 and the pressing force of the forming roll R, It is possible to form the both-end curvilinear-shaped forming beam B2 having the secondary curvature at both ends of the forming beam B1.

According to the bending apparatus 100 according to the embodiment of the present invention as described above, both end portions of the curved forming beam B1 formed with a certain curvature are bent in a roll bending method with a simple structure, It is possible to reduce the size of the bending equipment and reduce the initial investment cost.

Further, in the embodiment of the present invention, the curved forming beam B1 molded with a certain curvature through the roll forming forming process is formed into the both end curvature forming beam B2 having the secondary curvature at both ends, Can be minimized, and the production time can be shortened.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Other embodiments may easily be proposed by adding, changing, deleting, adding, etc., but this is also within the scope of the present invention.

1 ... Base 10 ... Bending die
20 ... center mold 21 ... first curvature surface
30, 40 ... left and right mold 31 ... second curvature surface
41 ... third curvature surface 50 ... both side rotating frames
51 ... rotation shaft 52 ... bearing
60 ... rotating cylinder 61, 81 ... operating rod
70 ... press mold 80 ... press cylinder
90 ... guider B1 ... curved forming beam
B2 ... both ends curvature forming beam R ... forming roll
S ... roll shaft

Claims (4)

1. A bending apparatus for bending both end portions of a curved forming beam formed by roll forming with a constant curvature to impart a secondary curvature to both ends of the curved forming beam,
A bending die installed upright on the base;
A central mold fixedly installed at the front center of the bending die and supporting between the ends of the curved forming beam;
Left and right molds fixedly attached to the bending die at both sides of the center mold and for imparting a predetermined curvature to both ends of the forming beam;
Side rotating frames provided on the bending dies respectively corresponding to the left and right dies so as to be rotatable on both left and right sides of the center mold;
A rotary cylinder in which one end is hinged to the both-side rotary frame and the other end is hinged to the base;
A pressing mold which is installed between the both side rotating frames so as to reciprocate vertically on the bending die corresponding to the center mold and presses the curved forming beam on the center mold; And
And both ends of the curved forming beam are pressed and bent along the curvature of the left and right molds in contact with both ends of the curved forming beam when the both rotating frames are rotated A forming roll,
Wherein the pressing die is connected to a pressurizing cylinder fixed to the bending die, the both rotating frames are rotatably installed on the bending die through a rotating shaft, the rotating shaft is installed in the bending die through a bearing,
And a guider is installed on both sides of the upper portion of the bending die corresponding to the both-side rotary frames to guide the two rotary frames. delete delete delete

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