KR102472698B1 - Bending appratus for extrunstion product of aluminum alloy - Google Patents

Abstract

The present invention is to provide a bending apparatus for an extruded aluminum alloy material, capable of minimizing springback. The bending apparatus for an extruded aluminum alloy material according to one embodiment of the present invention includes a pair of movable modules disposed while facing each other and a guide module configured to guide an extruded material between the pair of movable modules. The pair of movable modules each include a fixing part configured to fix both ends of the extruded material, and the pair of movable modules are configured to move the extruded material fixed to the fixing part in a first direction in which the pair of movable modules face each other, a second direction perpendicular to the first direction, and a third direction for rotating around an axis parallel to the second direction. The guide module includes a plurality of guide molds.

Description

Bending apparatus for aluminum alloy extruded materials {BENDING APPRATUS FOR EXTRUNSTION PRODUCT OF ALUMINUM ALLOY}

The present invention relates to a bending device for an aluminum alloy extruded material, and more particularly, to a bending device for a roof side rail made of an aluminum alloy.

Recently, in the automobile industry, a lot of research and development on weight reduction of vehicles has been conducted in order to improve energy efficiency. In particular, in the case of an electric vehicle, which has recently been in the limelight, the weight of the battery is greater than that of an existing internal combustion engine/diesel vehicle, and the effect of improving fuel economy through weight reduction of the vehicle is more noticeable, so the need for weight reduction of the vehicle is greater.

Accordingly, the use of lightweight metals such as aluminum alloys is expanding even in vehicle parts.

Meanwhile, vehicle parts such as roof side rails may be made of a hollow extruded material, and may be manufactured into a required shape through a bending process of bending the extruded material. In the bending process of extruded materials, when the bending force is removed, a springback phenomenon in which the deformed part returns to its original state due to the elastic restoring force of the extruded material may occur. Therefore, it is important to reduce springback in order to obtain a desired shape through the bending process. do.

In the past, several efforts have been made to calculate and correct the amount of spring back, but there is still a need for technology development in terms of minimizing the amount of spring back.

Japanese Patent Publication No. 3658940 (2005. 3. 25)

The present invention is to solve the above-described problems of the prior art, and an object of the present invention is to provide a bending device for an aluminum alloy extruded material capable of minimizing spring back.

In addition, an object of the present invention is to provide a bending device for an aluminum alloy extruded material capable of three-dimensional bending.

An aluminum alloy extruded material bending apparatus according to an embodiment of the present invention includes a pair of movable modules disposed facing each other and a guide module configured to guide an extruded material between the pair of movable modules. Each of the pair of movable modules includes a fixing part configured to fix both ends of the extruded material, and the pair of movable modules move the extruded material fixed to the fixing part in a first direction, a direction in which the pair of movable modules face each other. It is configured to move in a second direction, which is a direction perpendicular to the direction, and in a third direction, which is a direction rotating about an axis parallel to the second direction. The guide module includes a plurality of guide molds.

According to one embodiment of the present invention, a plurality of guide molds of the guide module may be symmetrically arranged between the movable modules. Alternatively, according to one embodiment of the present invention, a plurality of guide molds of the guide module may be asymmetrically disposed between the movable modules.

According to one embodiment of the present invention, the movable module may further include a main body and a support for supporting the main body. In this case, a first rail may be installed in the main body part along the second direction, and a fixing part may be installed to be movable on the first rail. In addition, a second rail may be installed in the support part in the first direction, and the body part may be installed to be movable on the second rail.

The bending device according to an embodiment of the present invention may further include a driving module for rotating the support of the movable module in the third direction.

According to one embodiment of the present invention, the mold guide of the guide module may include a fixed mold configured to support the extruded material and a movable mold configured to press the extruded material supported by the fixed mold.

According to one embodiment of the present invention, the mold guide of the guide module may further include a flange mold configured to fix the flange of the extruded material.

According to one embodiment of the present invention, the guide module may be configured to simultaneously move the extruded material fixed to the fixing unit in at least two directions of a first direction, a second direction, and a third direction.

According to one embodiment of the present invention, when bending an aluminum alloy extruded material, a guide module for guiding the extruded material is composed of a plurality of guide molds and bi-directional bending is possible, thereby minimizing spring back through division of the bending amount.

In addition, according to an embodiment of the present invention, when bending an aluminum alloy extruded material, three-dimensional bending is possible by enabling bending in three directions orthogonal to each other as axes, and thus bending into various shapes is possible.

1 is a schematic view of a bending device according to an embodiment of the present invention viewed from the front.
Figure 2 is a partial schematic view of the bending device according to an embodiment of the present invention viewed from the rear.
3 is a view showing a guide module of a bending device according to an embodiment of the present invention.
4 is a diagram schematically showing an operating aspect of a bending device according to an embodiment of the present invention.
5 is a diagram schematically showing a one-way bending process.
6 is a diagram schematically showing a bidirectional bending process according to an embodiment of the present invention.
7 is a schematic cross-sectional view of an extruded material applied to a bending device according to an embodiment of the present invention.
8 is a schematic view of a guide mold of a bending device according to an embodiment of the present invention viewed from the side.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention will be described in detail so that those skilled in the art can easily practice it.

All terms used in this specification have meanings commonly understood by those of ordinary skill in the art, unless defined otherwise, and all terms used in this specification are intended to explain the present invention more clearly. Since it is used for, it should be understood that the scope of the present invention is not limited thereby.

Expressions such as "comprising" and the like used herein are to be understood as open-ended terms that include the possibility of including other embodiments unless otherwise stated in a phrase or sentence in which the expression is included. In addition, terms including ordinal numbers such as “first” and “second” used herein may be used to describe various components, but are used only for the purpose of distinguishing one component from another component. As such, the components are not limited by these terms.

In this specification, when an element is described as being “located” or “connected to” one side of another element, this means that the element is positioned in direct contact with or directly connected to one side of another element. It should be understood that it is not limited, and may be positioned or connected with other new components interposed therebetween.

In order to clearly describe the present invention, descriptions of parts not related to the present invention have been omitted, the same or corresponding elements in the accompanying drawings are indicated by the same reference numerals, and descriptions of the same or corresponding elements are not given. may be omitted. However, even if a description of a specific component is omitted in the description below, this does not mean that the component is not included in the embodiment.

In addition, since the size, thickness, position, etc. of each component shown in the drawings are arbitrarily shown for convenience of explanation, the present invention is not necessarily limited to those shown. That is, specific shapes, structures, and characteristics described in the specification may be changed and implemented from one embodiment to another without departing from the spirit and scope of the present invention, and the position or arrangement of individual components may also be implemented without departing from the spirit and scope of the present invention. and can be changed without departing from its scope.

Therefore, the detailed description to be described later is not performed in a limiting sense, and the scope of the present invention should be taken as encompassing the scope claimed by the claims and all scopes equivalent thereto.

1 is a schematic view of a bending device according to an embodiment of the present invention viewed from the front, and FIG. 2 is a partial schematic view of a bending device according to an embodiment of the present invention viewed from the rear. A bending device according to an embodiment of the present invention is formed substantially symmetrically from left to right, and in FIG. 2, for convenience of explanation, only the right portion of the bending device is schematically illustrated when viewed from the rear.

Referring to FIGS. 1 and 2, an aluminum alloy extruded material bending device (hereinafter referred to as 'bending device') 10 according to an embodiment of the present invention includes a movable module 100 and a guide module 200. do.

The movable module 100 of the bending device 10 according to an embodiment of the present invention moves both ends of the aluminum alloy extruded material to set a bending direction and to apply a bending force. The movable module 100 may be formed of a pair disposed facing each other, and through this, as will be described later, the aluminum alloy extruded material can be bent in both directions.

The movable module 100 may include a body part 110 , a support part 120 and a fixing part 130 .

As shown, the body portion 110 of the movable module 100 may be formed as a pair of pillars facing each other and may be disposed on the support portion 120 . A first rail 111 extending along the vertical direction of the pillar may be installed on the main body 110 .

The support part 120 of the movable module 100 may perform a function of supporting the lower part of the main body part 110 . A second rail 121 extending along a first direction, which is a direction in which the movable modules 100 face each other, may be installed on the support part 120 . According to this embodiment, the body part 110 of the movable module 100 is disposed on the second rail 121 of the support part 120, and configured to move along the first direction on the second rail 121. do.

The fixing part 130 of the movable module 100 is installed on the body part 110 and is configured to fix both ends of the aluminum alloy extruded material to be bent. The fixing part 130 is installed on the first rail 111 of the body part 110 and is configured to be movable in a vertical direction of the body part 110, that is, in a second direction perpendicular to the first direction.

The guide module 200 of the bending device 10 according to an embodiment of the present invention is disposed between the pair of movable modules 100 to guide the aluminum alloy extruded material to be bent. Specifically, the guide module 200 serves to guide the aluminum alloy extruded material so that it is bent into a preset shape. According to this embodiment, the guide module 200 may be formed of a plurality of guide molds.

3 is a view showing a guide module of a bending device according to an embodiment of the present invention.

Referring to FIG. 3 , the guide module 200 may include a plurality of guide molds. According to this embodiment, the guide module 200 includes a total of six guide molds 200a to 200f. A plurality of guide molds (200a ~ 200f) may be installed on the base (210). The plurality of guide molds 200a to 200f may be classified into two or more groups, and each group may be disposed on a different base or sub-base. For example, as shown, the first guide mold 200a and the second guide mold 200b constitute a first group, the third guide mold 200c constitutes a second group, and the fourth guide mold 200c constitutes a second group. The mold 200d, the fifth guide mold 200e, and the sixth guide mold 200f may constitute a third group, and the first group and the third group are separate sub-bases installed on the base 210. (220).

According to this embodiment, a plurality of guide molds constituting the guide module 200 may be arranged in a preset form. For example, referring to FIG. 3 , the first groups 200a, 200b and the third groups 200d, 200e, and 200f centered on the second group 200c may be tilted upward in the drawing. . In addition, the first group 200a, 200b and the third group 200d, 200e, 200f may be approximately symmetrically arranged around the second group 200c.

The plurality of guide molds may have an arrangement according to the shape of a finally produced extruded product (eg, a roof side rail), and the arrangement of the guide molds may be changed in various forms unlike shown. That is, it should be understood that it is obvious to those skilled in the art that the number, arrangement, group configuration, sub-base configuration, etc. of a plurality of guide molds can be variously modified.

Referring back to FIGS. 1 and 2 , the bending device 10 according to an embodiment of the present invention may further include a driving module 300 . The driving module 300 of the bending device 10 according to an embodiment of the present invention is connected to the movable module 100 and configured to rotate the movable module 100 in one direction. Specifically, as shown in FIG. 2 , the driving module 300 is connected to the support 120 of the movable module 100, and the direction in which the first rail 111 extends (ie, the second direction) is an axis. It is configured so that the support 120 can be rotated. For example, the driving module 300 may be formed of an actuator that is stretchable along one direction.

4 is a diagram schematically showing an operating aspect of a bending device according to an embodiment of the present invention.

As described above, the pair of body parts 110 of the movable module 100 move along the second rail 121 in the first direction A (ie, the direction in which the pair of movable modules face each other). It is possible, and the fixing part 130 installed on the body part 110 is movable in the second direction B (ie, the direction in which the first rail 111 extends) perpendicular to the first direction A. It is configured, and the support part 120 supporting the body part 110 is configured to be able to rotate in a third direction C, which is a direction that rotates around a rotational axis parallel to the second direction B.

Referring to FIG. 4, the operation mode will be sequentially described. The main body 110 of the movable module 100 moves along the second rail 121 in the first direction A, and the fixing part 130 Stretching of the aluminum alloy extruded material to which the ends are fixed is made.

After stretching or at the same time, the support 120 may be rotated in the third direction (C) by the driving module 300 . More specifically, the support 120 of the movable module 100 may be rotated by the driving module 300 around a rotational axis parallel to the second direction B. At this time, while the aluminum alloy extruded material is bent, it may be adhered to and fixed to each of the guide molds of the guide module 200, and a bending force may be applied thereto.

After the support part 120 rotates or at the same time, the fixing part 130 of the movable module 100 may move in the second direction B along the first rail 111 . At this time, bending force may be applied to the aluminum alloy extruded material while the aluminum alloy extruded material is in close contact with and fixed to each guide mold of the guide module 200 .

As such, according to the bending device 10 according to an embodiment of the present invention, the bending process may be performed after stretching the aluminum alloy extruded material or simultaneously with it. In addition, the bending process in the second direction and the bending process in the third direction may be performed together to perform three-dimensional bending of the extruded material.

On the other hand, according to one embodiment of the present invention, spring back can be significantly reduced through bi-directional bending of the aluminum alloy extruded material.

5 is a diagram schematically showing a one-way bending process, and FIG. 6 is a diagram schematically showing a two-way bending process according to an embodiment of the present invention. 5 and 6, in one-way bending, one side (right side in the drawing) of the extruded material is fixed and a tensile force is applied only to the other side (left side in the drawing) to achieve bending, whereas in both-way bending, both sides of the extruded material are applied. Bending is performed while tensile force is given to both.

Table 1 shows the results of measuring spring back when performing unidirectional bending and bidirectional bending in the bending device according to an embodiment of the present invention.

In Table 1, the left rotation angle is between the first group and the second group in the guide module 200 of the bending device 10 according to an embodiment of the present invention, that is, the second guide mold 200b and the third guide from the left. It means the rotation angle between the molds 200c, and the right rotation angle is between the second group and the third group in the guide module 200 of the bending device 10 according to an embodiment of the present invention, that is, the third guide. It means the rotation angle between the mold 200c and the fourth guide mold 200d. Further, in the spring bag, the x-axis direction refers to the longitudinal direction of the extruded material, and the y-axis refers to a direction perpendicular thereto.

division Rotation angle (°) Tensile force (kN) spring bag (mm) left side right left side right x-axis y axis x-axis y axis One 5 - 100 58.3 -15.7 4.5 20.9 2 5 - 110 52.8 -19.5 5.2 17.2 3 One One 100 28.9 20.3 -0.6 14.3 4 One One 110 25.4 21.3 -5.3 -0.6 5 2 One 100 9.4 29.1 1.3 12.0 6 2 One 110 2.3 32.3 2.3 -2.2

Referring to Table 1, when the same tensile force is applied, it can be seen that springback is significantly reduced when bending in both directions compared to bending in one direction. In addition, it can be confirmed that the spring back is reduced in the cases where the left and right rotation angles are different (Nos. 5 and 6) compared to the case where the left and right rotation angles are the same (Nos. 3 and 4).

According to one embodiment of the present invention, it is possible to bend a vehicle component made of an aluminum alloy extruded material, in particular, a roof side rail located on an upper portion of a side surface of a vehicle body into a desired shape.

7 is a schematic cross-sectional view of an extruded material applied to a bending device according to an embodiment of the present invention, and FIG. 8 is a schematic view of a guide mold of the bending device according to an embodiment of the present invention viewed from the side.

First, referring to FIG. 7 , an aluminum alloy extruded material applied to the bending device according to an embodiment of the present invention may be a roof side rail 20 . As shown, the roof side rails 20 have a closed cross-section structure. Specifically, the roof side rail 20 includes an upper side surface (hereinafter, a first surface) 21 configured to be disposed above the body when installed, and an outer surface configured to be disposed outside the side surface of the vehicle body (hereinafter, a second surface) ) 22 and an inner surface (ie, third surface) 23 configured to be disposed inside the side surface of the vehicle body, and has a substantially triangular closed cross-sectional structure.

In addition, the roof side rail 20 may further include a wing portion (flange) 24 extending from the closed section to one side. For example, the wing portion 24 may extend outward from a point where the second surface 22 and the third surface 23 meet. The wing portion 24 may function as a part fastened to the outer panel and the inner panel when the roof side rail 20 is assembled to the vehicle body.

Referring to FIG. 8 , the roof side rails 20 may be guided by a guide mold of the guide module 200 . To this end, the guide mold of the guide module 200 includes a fixed mold 201 and a movable mold 203.

The fixed mold 201 may perform a function of supporting the extruded material from one side. For example, the fixing mold 201 may be configured to contact and support the second surface 22 of the roof side rail 20 .

The moving mold 203 may be configured to press the other side of the extruded material when one side is supported by the fixed mold 201 . For example, when the second surface 22 of the roof side rail 20 is seated on and supported on the fixed mold 201, the movable mold 203 moves the first surface 21 of the roof side rail 20 and It may be configured to contact the third face 23 to apply a bending force.

According to one embodiment of the present invention, the guide mold of the guide module 200 may further include a flange mold 205.

The flange mold 205 may be configured to support the wing portion 24 of the roof side rail 20 together with the fixing mold 201 .

As such, the guide mold of the guide module 200 according to an embodiment of the present invention presses the extruded material to directly apply a bending force when the bending device 10 operates, so that bending can be performed according to a desired shape.

In particular, according to one embodiment of the present invention, the guide module 200 includes a plurality of guide molds, thereby reducing the spring back by dividing the amount of bending. In addition, by including a plurality of guide molds, it is possible to realize a desired bending shape of the extruded material by a simple operation of changing the arrangement of the plurality of guide molds. That is, the degree of freedom in mold design is improved, and it becomes easy to apply extruded materials of various shapes.

Although the present invention has been described above with specific details such as specific components and limited examples, the above examples are only provided to help a more general understanding of the present invention, and the present invention is not limited thereto, and the present invention is not limited thereto. Those skilled in the art can make various modifications and variations from these descriptions.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments and should not be defined, and it can be said that not only the claims described below but also all modifications equivalent or equivalent to these claims belong to the scope of the spirit of the present invention. will be.

10: bending device
100: operation module
110: body part
111: first rail
120: support
121: second rail
130: fixing part
200: guide module
300: drive module

Claims (10)

As a bending device for aluminum alloy extruded materials,
a pair of movable modules disposed facing each other; and
a guide module configured to guide the extruded material between the pair of movable modules;
including,
The pair of movable modules each include a fixing part configured to fix both ends of the extruded material,
The pair of movable modules move the extruded material fixed to the fixing part in a first direction, which is a direction in which the pair of movable modules face each other, in a second direction, which is perpendicular to the first direction, and parallel to the second direction. It is configured to move in a third direction, which is a direction of rotation around an axis,
The guide module includes a plurality of guide molds,
The guide mold of the guide module includes a fixed mold configured to support the extruded material and a movable mold configured to press the extruded material supported by the fixed mold,
bending device. According to claim 1,
A plurality of guide molds of the guide module are symmetrically disposed between the movable modules, the bending device. According to claim 1,
A plurality of guide molds of the guide module are asymmetrically disposed between the movable modules, the bending device. According to claim 1,
The bending device, wherein the movable module further includes a body portion and a support portion supported by the body portion. According to claim 4,
The bending device, wherein a first rail along the second direction is installed on the main body, and the fixing part is installed to be movable on the first rail. According to claim 4,
The bending device, wherein a second rail along the first direction is installed on the support, and the main body is installed to be movable on the second rail. According to claim 4,
The bending device further comprises a driving module configured to rotate the support of the movable module in the third direction. delete According to claim 1,
The guide mold of the guide module further comprises a flange mold configured to fix the flange of the extruded material, the bending device. According to claim 1,
The guide module is configured to simultaneously move the extruded material fixed to the fixing part in at least two directions among the first direction, the second direction, and the third direction.

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