KR101760315B1 - Method For Manufacturing Vehicle Suspension Part - Google Patents

Method For Manufacturing Vehicle Suspension Part Download PDF

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Publication number
KR101760315B1
KR101760315B1 KR1020150115517A KR20150115517A KR101760315B1 KR 101760315 B1 KR101760315 B1 KR 101760315B1 KR 1020150115517 A KR1020150115517 A KR 1020150115517A KR 20150115517 A KR20150115517 A KR 20150115517A KR 101760315 B1 KR101760315 B1 KR 101760315B1
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KR
South Korea
Prior art keywords
bending
mold
mold portion
forming member
molded member
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KR1020150115517A
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Korean (ko)
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KR20170021111A (en
Inventor
박건형
김진우
윤여웅
Original Assignee
주식회사 센트랄
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Priority to KR1020150115517A priority Critical patent/KR101760315B1/en
Publication of KR20170021111A publication Critical patent/KR20170021111A/en
Application granted granted Critical
Publication of KR101760315B1 publication Critical patent/KR101760315B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/001—Suspension arms, e.g. constructional features

Abstract

The present invention relates to a method of manufacturing a suspension for a vehicle, and more particularly, to a method of bending a molding material in a manufacturing method. According to one embodiment, a method of bending a bending portion of a forming member by pressing both the upper bending mold portion and the lower bending mold portion from each other is introduced.

Description

Technical Field [0001] The present invention relates to a method for manufacturing a suspension,

BACKGROUND 1. Field The present disclosure relates to a method of manufacturing a suspension for a vehicle. More particularly, the present invention relates to a method of manufacturing a suspension component by bending a molded member.

One of the methods for manufacturing the control arm, which is a suspension member for a vehicle, is a roll forming step, a bending step, a forging step, and a cutting step.

In the roll forming step, a rod-shaped molded member having a cross section set in the longitudinal direction is formed by passing between a roll and a roll which are rotated.

Bending is required depending on the shape of the control arm, and the bending step is a step of pressing the forming member formed by the roll forming and bending the member in a U shape.

Here, the 'U' type may be bent to an asymmetric 'U' type.

The forging step is a step of forging the bending molded member to form the shape of the control arm, and unnecessary parts are removed through the cutting step for the shaped control arm thus completed.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

1A, there is a problem that wrinkles are formed on the inside of the bending portion due to the occurrence of a material overlap portion where the forming member is folded at the point of the axis where the forming member is pressed when the bending member is bent Respectively.

FIG. 1B is a problem that occurs when bending by the conventional guide roll. Therefore, when the forming member is bent in the asymmetric 'U' shape without bending in the symmetrical 'U' shape, there is a problem that the molded member is deviated from the reference position.

Therefore, in order to overcome the problems of FIGS. 1A and 1B, a new method for bending a molded member is required.

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

In order to solve the above-described conventional problems, the method for manufacturing a suspension for a vehicle according to an embodiment of the present invention may include a roll forming step, a bending step, a forging step, and a cutting step.

The roll forming step may include molding at least one bending portion and forming a forming member that determines the cross-sectional dimension at a predetermined interval.

In the bending step, an upper bending mold portion located above the forming member and a lower bending mold portion located below the forming member exist in the forming member formed by the roll forming step, and the forming member is pressed together at both sides Bending method.

The forging step may be a step of forging the bendable molded member to form a vehicle suspension component.

The upper bending mold portion may be formed to surround the outer portion of the molded member from the upper portion to the middle portion with respect to the center of the width of the molded member.

The lower bending mold portion may be configured to surround the outer portion from the lower portion to the center of the molded member with respect to the center of the width of the molded member.

Therefore, the forming member may be formed such that the periphery of the outer surface is surrounded by the upper bending mold portion and the lower bending mold portion.

In one embodiment, the lower mold includes a lower left mold portion bending against the lower portion of the molding member, a lower right mold portion bending against the lower portion of the molded member at the right side, and a lower right mold portion bending against the lower portion of the lower right mold, And a lower bending mold portion which is movably installed through the portion.

Further, when the lower bending mold portion supports and presses the molded member upward in the downward direction, the upper bending mold portion presses the molding member downward in the upward direction with a pressure larger than the pressure that the lower bending mold portion presses, And moving the forming member and the lower bending mold portion downward.

Here, the lower bending mold portion may include a hydraulic cylinder, and the hydraulic cylinder may be controlled such that the upper bending mold portion moves downward to a predetermined speed or lower.

In the bending step according to another embodiment of the present invention, the upper mold has an upper left mold portion which abuts on the upper left side of the forming member to bend the left side of the forming member, a lower left mold portion which abuts on the upper right side of the forming member, And an upper bending mold portion that passes through between the upper left mold portion and the upper right mold portion and is movable in the vertical direction.

According to another embodiment of the present invention, the bending portion of the molded member is located above the lower bending mold portion. After the upper bending mold portion presses the upper portion of the bending portion by downward movement, the upper left mold portion and the upper right mold portion move downward And bending the molded member.

The upper left mold portion includes a first surface portion that is gently inclined and a second surface portion that is a steeply inclined surface, the first upper surface portion and the second surface portion abutting the upper left portion of the molded member, And the upper right mold portion abuts at the right upper portion of the molding member to bend the right side of the molding member and has a sloped surface that is abruptly higher than the second surface portion, And the right side may include an abruptly inclined surface corresponding to the upper right side mold portion. The first side surface portion, the inflection point, and the second side surface portion may have inclined surfaces corresponding to the first and second surface portions.

The mold apparatus of the present invention includes an upper mold including an upper bending mold portion positioned at an upper portion of the molding member and pressing the bending portion of the molding member at the upper portion thereof and a lower bending portion located at a lower portion of the molding member, A lower right side mold portion in which a mold portion and a right side portion of the molded member are placed and a lower bending mold portion which penetrates between the lower left mold portion and the lower right side mold portion and is provided so as to be movable up and down, And a lower mold including a lower mold.

According to another embodiment of the present invention, there is provided a mold apparatus comprising a lower bending mold portion positioned at a lower portion of a molding member and supporting and pressing a lower portion of a bending portion of the molding member, and a lower bending mold portion supporting a left side portion of the molding member, And a right supporting portion provided on the left side of the forming member so as to be able to move together with the right side portion of the forming member as the forming member is bent while supporting the right side of the forming member, And an upper bending mold portion positioned above the forming member and pressingly supporting an upper portion of the bending portion of the molding member; a lower bending mold portion provided on the left and right sides of the molding member so as to be movable relative to the upper bending mold portion, An upper mold including an upper left mold part and an upper right mold part which can move downward while pressing the part, It can be configured.

It is possible to suppress the occurrence of wrinkles caused in the molding material when bending the molding member through the above-described method or the mold apparatus, to bend stably even in the asymmetric U-bending molding, and to increase the manufacturing efficiency of the vehicle suspension .

FIGS. 1A and 1B are views showing a conventional problem in the bending step.
Fig. 2 shows a manufacturing process of a vehicle suspension.
Fig. 3 is a view showing a first embodiment of a process for manufacturing a suspension for a vehicle according to the present invention.
4 is a view showing a second draft of a manufacturing process of a suspension for a vehicle according to the present invention.

Hereinafter, one embodiment of the present technology will be described in detail with reference to exemplary drawings. However, this is not intended to limit the scope of the present technology.

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, the size and shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms specifically defined in consideration of the structure and operation of the present technology are intended to illustrate embodiments of the present technology, and do not limit the scope of the present technology.

Fig. 2 shows a manufacturing process of a suspension for a vehicle, particularly a control arm.

The manufacturing process of the control arm includes steps (a) to (b) of rolling the formed member 10, bending step (c), forging step (d) . ≪ / RTI >

The molded member 10 may be made of the same material as the aluminum alloy. The forming member 10 is formed so as to have a predetermined cross-sectional size along the longitudinal direction while passing between the roll molds.

Such roll forming processes (a) to (b) may be performed by a multi-step process or a multi-pass process, and a process designing stage for designing the molding process and a roll mold designing stage for designing a roll mold may be premised .

Referring to the forming member 10 formed by the roll forming step in FIG. 2 (b), the forming member 10 has a shape in which the widths of the upper and lower portions are constant from left to right, 2a) and the lower and upper width become smaller. The smaller phase and the lower width are kept constant, and the inclination 2b is formed in the radial direction, so that the upper and lower widths are increased again. In addition, the upper and lower widths of the molded member 10 are kept constant on the right side, and then are inclined 2c in the axial direction so that the upper and lower widths are formed to be small and maintained and are inclined 2d in the radial direction from the right side again The upper and lower widths may be formed larger again and the width may be connected to the right end.

In other words, the molded member 10 can be formed as a left side portion, a right side portion, and a middle portion. When viewed from the left side and the center portion, the right side of the left side portion and the left side of the center portion are inclined in the axial direction (2a, 2b) The lower width can be connected through the left connection portion formed to be relatively small. The center portion and the right side portion may be connected to each other via a right connection portion formed by inclining the cam portion 2c and 2d in the axial direction from the right side of the center portion and the left side portion of the right side portion when viewed from the center portion and the right portion.

That is, the molded member 10 may be formed in the order of the left side, the left side connection, the center, the right side connection, and the right side.

The inclined portion of the molded member 10 may be smoothly formed.

The left portion, the central portion, and the right portion of the molded member 10 may have a similar upper and lower width. The widths of the left connection portion and the right connection portion are smaller than those of the left portion, the center portion, and the right portion, and may be longer.

The forming member 10 formed by the roll forming step may be a bending portion 15 at the center portion.

Each of the outer surfaces of the molded member 10 may have a cylindrical shape (left side portion, left side connection portion, center portion, right side connection portion, right side portion).

The shape of the molded member 10 formed by the roll forming step can be varied in width and length in accordance with the shape of the control arm to be manufactured and is not limited to the shape as described above.

Fig. 3 shows a first embodiment of a method of bending the molded member 10. Fig.

The upper mold 100 is located on the upper side of the molded member 10.

The upper mold 100 is movable upward and downward, and can be pressed downward through the motion.

An upper bending mold part 110 is formed on a lower side of the upper mold 100.

The upper bending mold part 110 may be formed in a semi-cylindrical shape and recessed upward. Therefore, the upper bending mold part 110 may be configured to wrap the upper part of the bending part 15 of the cylindrical forming member 10.

The upper bending mold part 110 may be configured to cover the upper part of the forming member 10 from the upper part to the center. That is, the upper bending mold part 110 may be configured to surround the molding member 10 having a circular peripheral surface from the top to the center.

The lower mold 200 may include a lower bending mold portion 210, a lower left mold portion 230, and a lower right mold portion 220.

The molded member 10 can be supported by the lower mold 200. That is, the left side portion and the right side portion of the molded member 10 are held in contact with the lower left mold portion 230 and the lower right side mold portion 220.

The lower bending mold part 210 may be configured to enclose the bending part 15 of the molded member 10. The lower bending mold part 210 may be formed as a semi-cylindrical shape by being depressed downward. Therefore, the lower bending mold part 210 can cover the molding member 10 having the cylindrical peripheral surface. In the case where the lower bending mold part 210 surrounds the molding member 10, The lower bending mold part 210 may be configured to wrap from the lower part of the forming member 10 to the central position. In other words, it can be a form in which the semicircle of the molding member 10 having a circular peripheral surface is surrounded from the bottom.

The molded member 10 may be formed such that the entire circumference of the outer surface is enclosed by the upper bending mold portion 110 and the lower bending mold portion 210. The upper and lower portions of the bending portion 15 of the molded member 10 may be in contact with the upper bending mold portion 110 and the lower bending mold portion 210, The center portion of the lower bending mold portion 210 may not be in contact with the upper bending mold portion 110 and the lower bending mold portion 210. That is, the molding member 10 is circular, but the shapes of the upper bending mold part 110 and the lower bending mold part 210 need not perfectly coincide with the outer surface of the molding member 10.

As shown in the cross section of the molding member 10 surrounded by the upper bending mold part 110 and the upper bending mold part 110, a fine space that can be moved forward and backward from the center of the width can be formed. The minute space can accommodate a change in the width of the molded member 10 when the molded member 10 is bent so that the upper and lower widths of the upper and lower portions are decreased and the front and rear widths are increased. A portion of the molded member 10 wrapped by the upper bending mold portion 110 and the lower bending mold portion 210 is a bending portion 15.

The overall shape of the lower left mold part 230 and the lower right mold part 220 may be a U shape. However, the 'U' type may be a symmetrical 'U' type or an asymmetric 'U' type. That is, the center of the 'U' shape may be formed to be deflected to the right. The lower left mold part 230 and the lower right mold part 220 may be disconnected. That is, a certain space may be formed between the lower left mold part 230 and the lower right side mold part 220. The lower bending mold portion 210 passes through the space and moves up and down.

The lower left mold part 230 has a first surface formed at a predetermined angle from the space to the left and the upper side, an inflection point at which a predetermined angle of the first surface is bent, and an angle more abrupt than an angle formed by the first surface A second surface inclined to be inclined and connected to the second surface to be flat and formed as an upper surface on which the molded member 10 is seated.

The connection between the second surface and the upper surface may be connected by a rounded curved surface.

The lower right side mold part 220 may be formed as a single surface having an abrupt angle from the second side to the right side and the upper side from the space. The surface may be connected to an upper surface on which the molded member 10 is mounted in a round shape.

However, the lower left mold part 230 and the lower right mold part 220 are not limited to those described above, and may be different depending on the type of the control arm to be manufactured.

The shape of the lower left side and the left side of the upper mold 100 may be formed to correspond to the shape of the lower left mold 230. That is, the left side of the upper mold 100 located directly above the first surface may be formed as a surface having a slope similar to that of the first surface, that is, a surface inclined gradually toward the upper side. In addition, an inflection point at which the gentle slope surface is bent and a surface having a sharp slope corresponding to the second surface may be formed. The abrupt inclined surface may have a flat surface on the left side so as to correspond to the upper surface of the lower left mold part 230.

The shape of the lower right side and the right side of the upper mold 100 may be a shape having only one surface having a steep slope toward the upper side so as to correspond to the shape of the lower right side mold part 220. [ Also, a flat plane corresponding to the upper surface of the lower right side mold part 220 is formed on the right side.

The left and right widths of the upper mold 100 are smaller than the spaces formed by the lower left mold part 230, the lower right mold part 220 and the lower bending mold part 210 inserted into the space. Therefore, when only the upper mold 100 moves downward without the molding member 10, it can be completely inserted into the space.

However, the shape of the left and right sides of the upper mold 100 is not limited to the one described above.

3, the left side portion of the molded member 10 is seated on the upper surface of the lower left mold portion 230, on the upper surface of the right side portion and on the upper surface of the lower right side mold portion 220, The bending portion 15 positioned at the center of the member 10 is wrapped from the bottom to the center by the lower bending mold portion 210 and may be wrapped from the top to the center by the upper bending mold portion 110 have.

The lower bending mold part 210 presses the lower part of the bending part 15 to support the upper part of the bending part 15 and the upper mold 100 presses the upper part of the bending part 15 downward through the upper bending mold part 110 .

Since the upper bending mold portion 110 presses the lower bending mold portion 210 downward at a pressure higher than the pressure that presses the molding member 10 upward, The bending mold portion 210 moves downward. The movement may be a straight line motion.

As the molded member 10 moves downward, the molded member 10 can be gradually bent around the bending portion 15. [ That is, the lower left side of the molded member 10 is pressed upward by the lower left side mold part 230 and the lower right side is respectively pressed by the lower right side mold part 220 and the left side and the right side of the upper part of the molded member 10 Can be bent by the left side and the right side of the upper mold 100.

Further, the downward movement speed of the upper bending mold portion 110 or the lower bending mold portion 210 can be controlled, whereby the bending speed of the molding member 10 can be controlled appropriately.

As the bending portion 15 is bent, the upper portion is compressed and the lower portion is tensioned. If the bending is abruptly performed, buckling may occur in the upper compression portion, and wrinkles may occur. In order to prevent this, the pressing force or the moving speed of the upper bending mold portion 100 and / or the lower bending mold portion 210 can be appropriately controlled during the bending process.

When the bending is completed, the molding member 10 is positioned between the upper mold 100 and the lower mold 200 and can be formed into a symmetric or asymmetric U-shape.

In the present embodiment, the movement of the upper mold 100 and the lower bending mold may be performed by a hydraulic press or a crank press, but the present invention is not limited thereto.

Figure 4 shows another embodiment of the bending step.

The upper mold 300 is located above the molded member 10.

The upper mold 300 passes through the upper left mold part 320 located on the left side, the upper right mold part 330 located on the right side and the upper left mold part 320 and the upper right mold part 330 And an upper bending mold part 310 positioned at the center.

The upper bending mold part 310 may be recessed inward to be similar to the shape of the center of the 'U' shape. That is, from the left side to the right side, it is possible to form the inclined surface toward the upper side and to form the semi-circular shape or the inverted U shape.

The upper bending mold part 310 is located between the upper left mold part 320 and the upper right mold part 330 and the upper bending mold part 310 is positioned between the upper left mold part 320 and the upper right mold part 330. [ 330, and can move up and down.

When the upper bending mold part 310 is located in the space, the shapes formed in the upper left mold part 320, the upper bending mold part 310 and the upper right mold part 330 are symmetric or asymmetric 'U' It can be type.

The upper left mold part 320 includes a first surface formed by sloping downward to the left from a space through which the upper bending mold part 310 passes, a bent section where the inclination of the first surface is bent, And a flat bottom surface connected to the second surface and abutting the upper left portion of the molded member 10 may be formed. The second surface and the lower surface may be connected by a rounded curved surface.

The upper right mold part 330 may have a surface having a sloped surface that is steeper than the slope of the second surface from the space toward the lower right. The upper right side mold part 330 may also be formed with a flat bottom which abuts on the upper right part of the forming member 10, and the connection of the inclined surface and the flat surface may be connected by a rounded curved surface.

However, the upper left mold part 320 and the upper right mold part 330 are not limited to those described above, and may be different depending on the type of the control arm, as in the above-described embodiments.

The lower mold 400 is located at the lower portion of the molded member 10.

The lower mold 400 may have a lower bending mold part 410 formed on one side thereof.

The protruding shape of the lower bending mold part 410 may be formed in a semicircular shape or an inverted U shape so as to correspond to the upper bending mold part 310.

The upper left bending portion 310 and the upper left bending portion 320 are formed in a shape corresponding to the left side inclined surface and the upper surface of the upper left mold portion 320, A bent portion formed at the left side of the lower bending mold portion 410 and corresponding to an inflection point corresponding to the inflection point of the upper left mold portion 320 and a shape having a steep slope corresponding to the second side of the upper left mold portion 320 As shown in FIG.

The shapes of the upper right side and the right side of the lower mold 400 may also be formed as one abrupt surface so as to correspond to the abrupt inclined surface of the upper right mold part 330. [

However, the shape of the lower mold 400 is not limited to that of the upper mold 300.

In addition, the lower mold 400 may include a support portion 500.

The supporting portion 500 serves to support the forming member 10 on both sides of the forming member 10.

The supporting part 500 can be linearly moved upward and downward.

Referring to FIG. 4, the bending method according to another embodiment of the present invention is shown to be bent in two steps.

Both ends of the molded member 10 are supported by the support portion 500 and the lower portion of the bending portion 15 can be abutted and fixed to the lower bending mold portion 410.

Thereafter, the upper bending mold portion 310 linearly moves downward to press the upper portion of the bending portion 15 of the molded member 10. (Step 1 molding) The pressing portion is the upper portion of the bending portion 15 of the molded member 10.

That is, the bending portion 15 of the molded member 10 can be pressed upward and downward by the upper bending mold portion 310 and the lower bending mold portion 410.

The molded member 10 can be primarily bent at the bending portion 15 through the pressing. In this case, the supporting part 500 supporting the forming member 10 at the end of the forming member 10 can also move downward naturally as the forming member 10 is bent.

In this embodiment, the first bending occurs through the upper bending mold part 310. However, in another embodiment, the upper bending mold part 310 can be simply moved to the upper part of the bending part 15 of the forming member 10 And may be used to support only the upper and lower portions.

The left connection part of the molded member 10 may be mounted on the upper left surface of the lower mold 400 by the bending.

After the first-stage bending, the upper left mold part 320 and the upper right mold part 330 move linearly downward to press the left and right sides of the forming member 10. (Two-stage molding)

That is, after the upper bending mold portion 310 moves downward and the bending portion 15 of the forming member 10 is firstly pressed, the upper left mold portion 320 and the upper right mold portion 330 move downward The left and right upper portions of the molded member 10 are pressed to complete the bending process. That is, the upper mold may be constituted by a hydraulic press having a double hydraulic structure.

By the bending process of FIG. 3 or the bending process of FIG. 4, the forming member 10 can be formed into a symmetrical or asymmetric 'U' shape.

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit of the invention, It will be apparent to those of ordinary skill in the art.

10: Molded part 15: Bending part (central part)
100: upper mold 110: upper bending mold part
200: lower mold 210: lower bending mold part
220: lower right side mold part 230: lower left side mold part
300: upper mold 310: upper bending mold part
320: upper left mold 330: upper right mold
400: lower mold 410: lower bending mold part
500: Support

Claims (10)

A suspension component for a vehicle to be manufactured, the suspension component including at least one bending portion, having a left side portion, a left side connecting portion, a bending portion, a right side connecting portion, and a right side portion, Forming a molded member such that the bending portion is formed so as to have a larger width than that of the left connection portion and the right connection portion, the bending portion being eccentrically positioned at one side from the center between the left side portion and the right side portion;
The bending portion is positioned between the upper mold and the lower mold so as to bend the molded member in an asymmetric U shape, and is bent by the movement of the upper mold or the lower mold. When the bending portion is bent, The upper bending mold portion of the upper mold and the lower bending mold portion of the lower mold may be bent at the other end of the molding member so as to control the bending speed to prevent wrinkles from being generated due to the sudden bending at the compression portion of the bending portion. A bending step in which bending is performed while the bending parts are pressed together at both sides;
A forging step of forging the bending molded member to shape the suspension member;
A cutting step of cutting the periphery of the forged member;
, ≪ / RTI &
The upper bending mold portion is formed at the lower portion of the upper mold and is formed so as to surround the outer portion from the upper portion to the center of the forming member with respect to the center of the width of the molding member, Wherein the upper bending mold portion is formed to surround the outer portion from the lower portion to the center of the molded member below the portion where the molded member is wrapped. delete The method according to claim 1,
Wherein the lower mold includes a lower left mold portion which abuts against a lower portion of the molding member on the left side and a lower right mold portion which abuts against a lower portion of the molding member on the right side, And the upper and lower right side mold parts are provided so as to be movable through the space between the upper and lower right side mold parts. The method of claim 3,
Wherein the lower bending mold portion supports the forming member in a downward direction from the upper bending mold portion of the upper mold when the lower bending mold portion supports and supports the forming member upward in the downward direction, And the lower bending mold portion is moved to a lower portion by pressing the molding member and the lower bending mold portion with a pressure larger than a pressure applied to the molding member and the lower bending mold portion. The method of claim 3,
Wherein the lower bending mold portion includes a hydraulic cylinder and the hydraulic cylinder is hydraulically controlled such that the upper bending mold portion moves downward below the set speed. The method according to claim 1,
Wherein the upper mold includes an upper left mold portion for bending the left side of the forming member and an upper right mold portion for bending the right side of the forming member in contact with the upper right portion of the forming member, Wherein the upper bending mold portion passes between the upper left mold portion and the upper right mold portion and is movable in the up-and-down direction relative to the upper left mold portion and the upper right mold portion. The method according to claim 6,
Wherein the bending step includes the step of positioning the bending portion of the forming member on the lower bending mold portion and moving the upper bending mold portion downward to press the upper portion of the bending portion; And
Bending the forming member by moving the upper left mold portion and the upper right mold portion downward;
Wherein the suspension includes a plurality of projections. 8. The method of claim 7,
Wherein the upper left mold portion includes a first surface portion having a gentle sloped surface and a second surface portion bent to bend the left side of the molded member in contact with the upper left portion of the molded member, Wherein the forming portion is formed from the inflection point and the left side of the forming member is bent at a two-
Wherein the upper right mold portion abuts at the upper right portion of the forming member to bend the right side of the forming member and bends the forming member at a steep incline with an abruptly inclined surface than the second surface portion,
Wherein a left side portion of the lower mold has a gentle inclined surface corresponding to the first surface portion and an abrupt inflection point corresponding to the upper left mold portion and a sharp inclined surface corresponding to the second surface portion, And a sharp inclined surface corresponding to the right mold part. delete delete
KR1020150115517A 2015-08-17 2015-08-17 Method For Manufacturing Vehicle Suspension Part KR101760315B1 (en)

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KR101760315B1 true KR101760315B1 (en) 2017-07-21

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011255404A (en) * 2010-06-10 2011-12-22 Kobe Steel Ltd Bending die, and apparatus and method for manufacturing automotive suspension arm using the same
WO2015083367A1 (en) * 2013-12-06 2015-06-11 新日鐵住金株式会社 Press molding device, production method for press molded article using said molding device, and press molded article

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011255404A (en) * 2010-06-10 2011-12-22 Kobe Steel Ltd Bending die, and apparatus and method for manufacturing automotive suspension arm using the same
WO2015083367A1 (en) * 2013-12-06 2015-06-11 新日鐵住金株式会社 Press molding device, production method for press molded article using said molding device, and press molded article

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