KR101848411B1 - Manufacturing apparatus and method for automotive bumper beam - Google Patents

Abstract

The present invention relates to a bumper beam manufacturing apparatus and a method for manufacturing a bumper beam for a vehicle. The bumper beam manufacturing apparatus includes a roller unit for unwinding a panel that is a raw material of a bumper beam and wound by a rotation operation, a leveler for flattening a panel supplied from the roller unit, A press forming unit for forming various holes at a position to be formed, a roll forming unit for forming a panel in a desired bumper beam shape, comprising a plurality of roll formers, a connecting portion of the formed bumper beam, A bending unit for bending the molded bumper beam so as to have a predetermined curvature, and a cutting unit for cutting the bumped bumper beam to a predetermined length, and a shock absorbing space is provided at the upper and lower portions, respectively So that the impact energy generated in the event of a vehicle collision can be effectively absorbed Prevent damage to the vehicle body and can be manufactured according to a vehicle bumper beam to protect the occupant.

Description

Technical Field [0001] The present invention relates to a bumper beam manufacturing apparatus and a manufacturing method for a bumper beam for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus and a method for manufacturing a bumper beam for a vehicle, and more particularly, to an apparatus and a method for manufacturing a bumper beam for a vehicle for manufacturing a bumper beam for a vehicle that absorbs impact energy generated in a vehicle crash.

Generally, a bumper unit of a vehicle absorbs an impact force to elastically deform when a vehicle collides, minimizes physical damage to the vehicle body, protects the engine and various devices mounted on the hood and the engine room, And is mounted on the front and rear of the vehicle so as to cover the vehicle.

These bumper units must satisfy impact requirements according to the regulations of each country, have high rigidity and impact resistance in a wide temperature range, and have a small expansion and contraction due to temperature.

For example, the following Patent Document 1 discloses a bumper unit configuration according to the prior art.

Fig. 1 is a schematic view of a conventional bumper unit, and Fig. 2 is a sectional view of the bumper beam shown in Fig.

1, the bumper unit 1 according to the prior art includes bumper beams 2 arranged in the vehicle width direction from the front and rear of the vehicle, bumper beams 2 arranged in front of the bumper beam 2, A bumper cover 4 that encloses the bumper beam 2 and the energy absorber 3 and a stay 6 that interconnects the bumper beam 2 and the front side member 5.

This bumper unit 1 absorbs a part of the impact energy while the energy absorber 3 is being compressed in the event of a vehicle collision and the remaining impact energy that has not been absorbed by the energy absorber 3 is absorbed by the rear bumper beam 2 and the stay 6), it is possible to protect the safety of passengers and various devices.

The bumper beam 2 is manufactured by processing a compression press (not shown). However, recently, as shown in FIG. 2, one panel is bent and formed several times through roll forming to form a closed space 7) are formed.

The bumper beam 2 is formed by bending the panel so that two closed spaces 7 are formed on the upper and lower sides, and then welded to each other in a final stage.

On the other hand, the present applicant has filed and filed a bumper beam configuration for a vehicle disclosed in the following patent document 2 and filed.

Patent Document 2 discloses a bumper beam configuration for a vehicle composed of an inner beam forming an up-and-down asymmetric space and an outer beam fixed to the front surface of the inner beam so as to correspond to a collision portion along the height of the vehicle body.

Korean Patent Registration No. 10-0527125 (published on November 9, 2005) Korean Patent Registration No. 10-1436815 (Announcement on Nov. 3, 2014)

However, in Patent Document 1, both ends of the panel are formed so as to meet each other at the front center portion of the bumper beam, and both ends of the panel, which meet at the center portion of the bumper beam, are bent to come into contact with the rear inner surface of the panel.

Patent Document 1 configured in this way complicates the construction of the roll former due to the need to bend both ends of the panel, and the welding operation is performed in such a state that both bent ends of the panel are in contact with the rear inner surface of the panel Accordingly, it is difficult to stably fix the object to be welded, resulting in deterioration in workability and delay in working time.

In the case where space is formed as mutually asymmetric as in Patent Document 2, the roll formers used in the roll forming apparatus are also required to be formed symmetrically with respect to each other, thereby complicating the structure of the forming apparatus.

Further, when the inner beam and the outer beam are individually manufactured and fixed by the welding method, there is a problem that the amount of welding work increases and the working time becomes long.

Further, the portion where the welding operation is performed is liable to be broken or separated by an impact force at the time of a vehicle collision. As a result, there has been a limit in completely preventing the safety of the occupant and the breakage of various devices in the event of a vehicle collision.

An object of the present invention is to provide a vehicle bumper beam manufacturing apparatus and method for manufacturing a vehicle bumper beam for absorbing impact energy generated in a vehicle collision to prevent damage to the vehicle body and protect the occupant .

It is another object of the present invention to provide a bumper beam forming apparatus and a method of manufacturing a bumper beam for a vehicle, which are capable of minimizing a portion to be welded to both ends of a panel, And a method for manufacturing the bumper beam for a vehicle.

It is still another object of the present invention to provide a bumper beam manufacturing apparatus and a manufacturing method for a vehicle which can improve workability in welding work of a bumper beam for a vehicle and improve bonding strength at a welded portion.

In order to achieve the above object, the present invention provides a bumper beam manufacturing apparatus for a vehicle, comprising: a roller unit which is a raw material of a bumper beam and unwinds and supplies a panel wound by a rotation operation; A roll forming unit for forming a panel in a desired bumper beam shape and formed of a plurality of roll formers, a connecting portion of the molded bumper beam and a support portion A bending unit for bending the molded bumper beam to have a preset curvature, and a cutting unit for cutting the bumped bumper beam to a predetermined length.

In order to achieve the above object, a method for manufacturing a bumper beam for a vehicle according to the present invention comprises the steps of: (a) spreading a panel, which is a raw material of a bumper beam supplied from a roller unit, into a flat plate using a leveler, (B) roll-forming the panel into the bumper beam shape using a roll forming unit comprising a plurality of roll formers, (c) (B) welding the bumper beam formed by the bending unit to a predetermined curvature of the curved surface of the bumper beam; (c) And (e) cutting the bumped beam bend using a cutting unit to a predetermined length.

As described above, according to the apparatus and method for manufacturing a vehicle bumper beam according to the present invention, the impact absorbing space is provided at the upper portion and the lower portion, respectively, It is possible to manufacture an automotive bumper beam that can prevent damage to the passenger and safely protect the passenger.

According to the present invention, it is possible to minimize damage to both ends of the panel and to minimize damage and separation of the welded part during the process of bending and forming one panel sequentially by the roll forming method .

Particularly, according to the present invention, when an impact is applied in front of the bumper beam, the impact force can be effectively buffered by using the upper and lower shock absorbing spaces formed in a rectangular shape having a longer transverse length than the longitudinal length, By forming embossed portions in the cushioning portions to enlarge the cross-sectional area, it is possible to reinforce the rigidity at the time of vehicle collision.

According to the present invention, by arranging the first and second support bars of the support portion obliquely upward or downward, it is possible to improve the rigidity against the impact applied from above or below the bumper beam, It is possible to reduce the degree of difficulty of the molding operation and make the operation easier, as compared with the case where the second support bars are respectively bent along the horizontal direction to perform the roll forming, and the workability can be improved.

In addition, according to the present invention, the connecting portion disposed at the central portion of the bumper beam and the front web formed by bending the both end portions of the panel are overlapped with each other and welded together to improve the rigidity of the central portion of the bumper beam, Can be minimized.

Further, according to the present invention, the welded portion is bonded by using the seam welding method or the laser welding method to increase the durability, so that it is possible to prevent separation or damage of the welded portion due to impact at the time of vehicle collision.

In addition, according to the present invention, it is possible to prevent the deterioration of the appearance quality of the front surface of the bumper beam due to the deformation of the front web caused by the heat applied during the welding operation and to prevent the detachment or damage of the welded portion during the bending operation of the bumper beam And it is possible to improve the workability of the welding work and to improve the bonding strength of the welded portion.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram of a conventional bumper unit,
FIG. 2 is a cross-sectional view of the bumper beam shown in FIG. 1,
3 is a perspective view of a bumper beam for a vehicle manufactured using the apparatus for manufacturing a bumper beam for a vehicle according to a preferred embodiment of the present invention,
4 is a cross-sectional view taken along the line A-A 'shown in Fig. 3,
5 is a side view of the apparatus for manufacturing a bumper beam for a vehicle according to a preferred embodiment of the present invention,
6 is a view illustrating a process of molding a bumper beam in the roll forming unit shown in FIG. 5,
7 to 9 are enlarged views of the roll former shown in Fig. 5,
10 is a perspective view of a bumper beam joined by seam welding,
11 is a cross-sectional view of the bumper beam shown in Fig. 10,
12 is a perspective view of a bumper beam joined by laser welding,
13 is a cross-sectional view of the bumper beam shown in Fig. 12,
14 is a cross-sectional view of a welding fixture applied to the welding unit,
15 is a configuration diagram of the bending unit,
16 is a process diagram for explaining a stepwise production method of a bumper beam for a vehicle according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and method for manufacturing a bumper beam for a vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 and 4, the structure of a vehicle bumper beam manufactured using the apparatus and method for manufacturing a vehicle bumper beam according to a preferred embodiment of the present invention will be described in detail.

FIG. 3 is a perspective view of a bumper beam for a vehicle according to a preferred embodiment of the present invention, and FIG. 4 is a sectional view taken along the line A-A 'shown in FIG.

Hereinafter, the right side coupled to the front side member of the vehicle body through the stay will be referred to as the rear side of the bumper beam, and the opposite side will be referred to as the front side of the bumper beam.

Accordingly, terms indicating directions such as 'forward, backward', 'upward' and 'downward' are defined as indicating the respective directions with reference to the front and rear surfaces.

In the present embodiment, the front bumper beam installed on the front surface of the vehicle is used. However, the present invention is not limited to this but it is also applicable to the rear bumper beam installed on the rear surface of the vehicle.

As shown in FIGS. 3 and 4, a bumper beam 10 for a vehicle according to a preferred embodiment of the present invention is formed by folding and molding one panel several times in a roll-forming forming manner, And 41 may be formed so as to have a substantially 'B' shape in cross section, and may be formed to have a predetermined curvature according to the front shape of the vehicle with a predetermined length in the horizontal direction after the molding operation.

Here, the vehicle bumper beam 10 can be manufactured using a panel made of high tensile steel or ultra high strength steel.

The high tensile steel means a steel having a tensile strength higher than that of a normal steel, and a steel having a tensile strength of 100 kg / mm 2 or more.

These high-strength steels are improved in performance by adding silicon, manganese, nickel, chromium, copper, etc. to carbon steel containing about 0.2% of carbon.

The super high tensile steel is a steel having a tensile strength higher than that of the high tensile steel, having a tensile strength of 100 kg / mm < 2 >.

Such super high tensile steel is produced by adding a small amount of silicon and manganese to a processing heat treatment called ausforming so as to have a tensile strength of 200 kg / mm 2 or more and a yield strength of 200 kg / Therefore, it is widely used for materials such as shipbuilding and bridges.

The bumper beam 10 for a vehicle has a supporting portion 20 protruding forward and an upper and a lower shock absorbing spaces 31 and 41 at the upper and lower ends of the supporting portion 20, And may include upper and lower cushioning portions 30 and 40 that are triple-folded.

The support portion 20 is formed by bending a panel several times to form an upper buffer portion 30 and a lower buffer portion 40 and then bending both ends of the panel toward the front surface again, 30 and the front surface of the lower cushioning portion 40 in a welded manner.

As shown in FIG. 4, the supporting part 20 includes a front web 21 vertically disposed on the front surface so as to have a substantially 'C' shape in section, and a front web 21 extending toward the rear of the front web 21 And may include first and second support bars 22,23.

The front web 21 is formed in such a manner that both ends of a panel bent and folded so as to overlap with the connection portion 100 are in contact with each other and a front web 21 is formed on the front surface of the front web 21 between the upper cushioning portion 30 and the lower cushioning portion 40 And the connecting portion 100 connecting the connecting portions 100 are disposed.

The first and second support bars 22 and 23 may be arranged in a horizontal direction, respectively.

In the present embodiment, the first and second support bars 22 and 23 are disposed on the second vertical bar 34 of the upper cushioning portion 30 and the fourth vertical bar 34 of the lower cushioning portion 40, 44 and a predetermined inclination angle alpha.

For example, the first support bar 22 may be formed at an upper end of the front web 21 so as to be inclined upward toward the rear side to form an angle of about 85 ° to 89 ° with the second vertical bar 34.

The second support bar 23 may be inclined from the lower end of the front web 21 toward the rear side downward at an angle of about 85 ° to 89 ° with the fourth vertical bar 44.

As described above, according to the present invention, the first and second support bars of the support portion are inclined rearwardly or downwardly, respectively, so that the rigidity against the impact applied at the upper portion or the lower portion of the bumper beam can be improved.

In addition, the present invention can improve the rigidity of the center portion of the bumper beam by bending the panel several times, and arranging the front webs formed by bending the both ends of the panels on the rear surface of the connecting portion disposed at the center of the panel.

In addition, the present invention can prevent deterioration of the appearance quality due to the deformation of the front web caused by heat applied during the welding operation, and can prevent separation or damage of the welded portion during the bending operation of the bumper beam.

Further, the present invention can improve the workability by reducing the degree of difficulty of the molding operation and facilitating the operation, as compared with the case where the first and second support bars are respectively bent along the horizontal direction to perform roll forming.

The upper buffer part 30 includes a first vertical bar 32 connected to the upper end of the connection part 100 and disposed along the vertical direction, a first horizontal bar 32 bent rearward from the upper end of the first vertical bar 32, And a second vertical bar 34 bent downward from a rear end of the first horizontal bar 33 and connected to a rear end of the first support bar 22. [

Accordingly, the substantially rectangular upper shock absorbing space 31 may be formed in the upper shock absorbing portion 30.

Although the upper shock absorbing space 31 is formed to have a substantially rectangular shape, the present invention can be applied to the case where the first support bar 22, the first and second vertical bars 32 and 34 and the first vertical bar 33 So that the upper shock absorbing space 31 can be formed into a square shape or a rectangular shape.

That is, in this embodiment, the lengths of the first support bar 22 and the first horizontal bar 33 are set to be equal to the lengths of the first and second vertical bars 33, 33 so that the impact applied in front of the bumper beam 10 can be sufficiently absorbed. The length of the upper shock absorbing space 31 may be longer than the length of the upper shock absorbing spaces 31 and 32 so that the upper shock absorbing space 31 may have a rectangular shape with a longer transverse length than the longitudinal length.

Likewise, the lower cushioning portion 40 includes a third vertical bar 42 connected to the lower end of the connection portion 100 and disposed along the vertical direction, a second vertical bar 42 bent rearward from the lower end of the third vertical bar 42, And a fourth vertical bar 44 which is bent upward from the rear end of the horizontal bar 43 and the second horizontal bar 43 and is connected to the rear end of the second support bar 23.

Accordingly, a substantially rectangular lower shock absorbing space 41 may be formed in the lower shock absorbing portion 40.

The lower shock absorbing space 41 is formed such that the lengths of the second support bar 23 and the third horizontal bar 43 are equal to the lengths of the third and fourth vertical bars 42 and 44, And may have a rectangular shape with a longer transverse length than the longitudinal length.

As described above, when the impact is applied to the front of the bumper beam, the impact force can be effectively buffered by using the upper and lower shock absorbing spaces formed in a rectangular shape having a longer transverse length than the longitudinal length.

The upper and lower shock absorbing spaces 31 and 41 are formed symmetrically with respect to each other and the height 2h of the upper and lower shock absorbing spaces 31 and 41 is about 2 Can be formed.

On the other hand, the first and third vertical bars 32 and 42 may have first and second embossed portions 35 and 45 for reinforcing the rigidity, respectively, so as to buffer an impact force at the time of a vehicle collision.

The first and second embossed portions 35 and 45 are formed on the first and third vertical bars 32 and 42 so as to protrude toward the rear in at least one concave manner or convexly protruding forward, By increasing the cross-sectional area of the vertical bars 32 and 42, it is possible to reinforce the rigidity of the first and third vertical bars 32 and 42 in the event of a vehicle collision.

Here, the first and second embossed portions 35 and 45 are recessed or protruded from the first and third vertical bars 32 and 42 along the longitudinal direction of the first and third vertical bars 32 and 42, To increase the cross-sectional area of the first and third vertical bars 32 and 42, and is preferably formed at a position corresponding to the upper and lower shock-absorbing spaces 31 and 41.

3 and 4, one of the first and second embossed portions 35 and 45 is recessed rearwardly. However, the shape of the first and second embossed portions 35 and 45, It should be noted that the number can be variously changed according to the size of the bumper beam 10.

In addition, the first and second embossments 35 and 45 may each be formed with a radius of curvature of about 5 mm to 10 mm.

The lower end of the first vertical bar 32 and the upper end of the third vertical bar 42 are connected to the connecting part 100 and the connecting part 100 is welded to the front surface of the front web 21 of the supporting part 20, . ≪ / RTI >

For example, the connection part 100 and the front web 21 may be joined by a seam welding method or a laser welding method.

5 to 6, a configuration of an apparatus for manufacturing a bumper beam for a vehicle according to a preferred embodiment of the present invention will be described in detail.

FIG. 5 is a side view of the apparatus for manufacturing a bumper beam for a vehicle according to a preferred embodiment of the present invention, and FIG. 6 is a view illustrating a process of forming a bumper beam in the roll forming unit shown in FIG.

As shown in FIG. 5, the apparatus 50 for manufacturing a vehicle bumper beam according to the preferred embodiment of the present invention is constructed such that a panel made of high tensile strength steel or ultra high tensile steel, which is a raw material of the bumper beam 10, A leveler 52 for spreading the panel supplied from the roller unit 51 in a planar shape, a press unit 53 for processing various holes at a position to be formed on the panel, A roll forming unit 54 which is made up of a roll former of a bumper beam and roll-forms the panel into a desired bumper beam shape, a connecting part 100 of the molded bumper beam 10 and a front web 21 of the supporting part 20, A bending unit 56 for bending the molded bumper beam 10 to have a preset curvature and a cutting unit 57 for cutting the bent bumper beam 10 to a preset length ).

The roller unit 51 may include a driving module for driving the roller to rotate in accordance with a control signal from a control unit (not shown) and a roller to which the panel is wound.

The leveler 52 includes a flat plate formed in a flat plate shape to spread the panel supplied from the roller unit 51 and a pressing roller disposed on the flat plate and pressing the panel downward to spread the flat plate can do.

The front end of the panel wound on the newly replaced roller and the rear end of the panel supplied from the existing roller after the panel wound on the roller mounted on the current roller unit 51 are supplied are provided between the leveler 52 and the roll forming unit 53 A panel joining unit 58 may be further provided.

The press unit 53 performs a pre-notch operation to be formed on the bumper beam 10 to form various holes and trim lines before molding by the roll-forming molding method.

5 and 6, the roll forming unit 54 may include a plurality of roll formers 60 for gradually forming the plate-shaped panel into the cross-sectional shape shown in Fig.

For example, in this embodiment, the roll formers 60 may be provided in 36 rolls.

Of course, it should be noted that the present invention is not necessarily limited thereto, and that the quantity and shape of the roll formers may be variously changed according to the formation of the bumper beam to be formed and the standard.

7 to 9 are enlarged views of the roll former shown in Fig.

FIG. 7 is an enlarged view of the roll formers 70 positioned at the third position, FIG. 8 is an enlarged view of the roll formers 80 positioned at the 18th position, FIG. Respectively.

Each of the roll formers 60 is sequentially arranged in a line on the base plate 59 as shown in Fig. 7, and gradually forms the panel supplied from the front end portion.

To this end, each roll former 60 may be disposed at a position corresponding to each other, and may include a lower roll that presses upwardly from a lower portion of the panel and an upper roll that presses downward from an upper portion of the panel.

11, the lower roll 71 and the upper roll 72 of the roll former 70 located at the third position are arranged on both sides of the connecting portion 100 disposed at the center of the panel 11, Are formed to be bent so as to form the upper and lower buffer parts (30, 40) and the support part (20), respectively.

The lower roll 81 of the roll former 80 located at the 18th position is bent to form the upper and lower buffer parts 30 and 40 and the supporting part 20 on the panel 12 as shown in FIG. do.

A first horizontal portion 83 corresponding to the connecting portion is provided at a central portion of the lower roll 83 and first and third vertical bars 32 and 42 are formed on both sides of the first horizontal portion 83, The first and second inclined surfaces 84 and 85 may be formed.

The first and second embossed portions 86 and 86 are formed between the first horizontal portion 83 and the first and second inclined surfaces 84 and 85 so as to correspond to the first and second embossed portions 35 and 45, , 87 may be convexly or concavely recessed upwardly.

The upper roll 82 of the roll former 80 located at the 18th position is formed with a first protruding portion 88 protruding downward in the central portion so as to correspond to the shape of the supporter 20, One end of the second vertical bar 34 and the first support bar 22 and the front web 21 and the other end of the fourth vertical bar 44 and the second support bar 23 and the front web 21, A bending molding portion 89 may be formed so as to bend the end portion in a double-fold manner.

The lower roll 91 of the roll formers 90 positioned at the 30 th position is connected to the connecting portion 100 of the bumper beam 10 to be finally formed, And the third vertical bar 42 and the second horizontal bar 43 of the lower cushioning portion 40 are formed to correspond to the shapes of the bar 31 and the first horizontal bar 32,

A first horizontal bar 33 and a second horizontal bar 93 are provided on both sides of the second horizontal part 93 and the second horizontal part 93 corresponding to the connection part 100, And third and fourth inclined surfaces 94 and 95 corresponding to the third and fourth inclined surfaces 94 and 95 are formed on the first and second inclined surfaces 94 and 95. The first and second embossed portions 94 and 95 are formed between the second horizontal portion 93 and the third and fourth inclined surfaces 94 and 95, The third and fourth embossment sections 96 and 97 may be convexly or concavely protruded upward so as to correspond to the first and second embossment sections 35 and 45, respectively.

The upper roll 92 of the roll former 90 positioned at the thirtieth position is formed with a second protruding portion 98 protruding downward to correspond to the support portion 20 of the bumper beam 10 to be finally formed at the center portion And the second vertical bar 34 of the upper cushioning portion 30 and the fourth vertical bar 44 of the lower cushioning portion 40 are pressed downward on both sides of the second projection 98 A press-formed portion 99 may be formed.

5, the joining unit 55 may join the joining unit 100 and the front web 21 by a seam welding method or a laser welding method.

The seam welding is a method in which a workpiece to be welded is disposed between a pair of roller electrodes and the spot welding is continuously repeated while rotating the electrode while applying pressure to the electrode.

For example, FIG. 10 is a perspective view of a bumper beam joined by a seam welding method, and FIG. 11 is a sectional view of the bumper beam shown in FIG.

10 and 11, the connecting portion 100 and the front web 21 are vertically arranged on the front surface of the connecting portion 100 and the front surface of the front web 21, respectively, Pairs of welding points P are formed at predetermined intervals.

The laser welding is a method in which a high energy laser beam is used to transfer high energy to a workpiece to be heated and welded. It is possible to weld even a minute size up to about 0.2 mm, Since the object absorbs the energy of the laser to generate heat, it can be heated and cooled more efficiently than other methods.

For example, FIG. 12 is a perspective view of a bumper beam bonded by a laser welding method, and FIG. 13 is a sectional view of the bumper beam shown in FIG.

12 and 13, when the connecting portion 100 and the front web 21 are joined by a laser welding method, welding points are formed continuously on the front surface of the connecting portion 100 and the rear surface of the front web 21, respectively Welded lines L can be welded to form a zigzag shape arranged vertically and laterally.

Needless to say, the present invention is not necessarily limited to this, and welding may be performed such that weld lines continuous from the welding points on the front surface of the connection portion and the rear surface of the front web are continuously formed in parallel vertically.

As described above, the present invention minimizes the welding area of the connecting part and the front web and increases the durability by joining the welding part by using the seam welding method or the laser welding method. Therefore, .

On the other hand, in the roll forming unit 50, the 34th to 36th roll formers 60 are provided on the rear side of the joining unit 55, and the vehicle bumper beam 10, in which the connecting portion 100 and the front web 21 are joined, To complete the closed end faces of the respective projecting portions.

The joining unit 55 may include a welding fixture 110 for completing the closed end face of the molded automotive bumper beam 10 during the welding operation and setting the welding point position.

14 is a sectional view of a welding fixture applied to the bonding unit.

14, the welding jig 110 includes a connecting portion 100 positioned at a lower portion of the welding operation of the automotive bumper beam 10 and a lower roller supporting the first and third vertical bars 32, The first horizontal bar 33 and the second horizontal bar 33 positioned on both sides of the upper bumper 111, the upper roller 112 for pressing the second and fourth vertical bars 34 and 44 located at the upper portion, And first and second guide members 113 and 114 for guiding both side ends of the beam 10.

A third horizontal portion 115 is formed in a planar shape so as to correspond to the connection portion 100 on the outer peripheral surface of the lower roller 111 and first and second embossed portions 35 and 35 are formed on both sides of the third horizontal portion 115, 45, and the fifth and sixth embossments 116, 117 may be formed.

A third projection 118 is protruded downward from the center of the outer circumferential surface of the upper roller 112 so as to correspond to the support portion 20 and second and fourth vertical bars 34 and 34 are formed on both sides of the third projection 117, 44 may be formed in a horizontal state by forming the third and fourth press-formed portions 119, 120 in a horizontal state.

The first and second guide members 113 and 114 guide both side ends of the vehicle bumper beam 10 moving by the rotation of the lower and upper rollers 111 and 112 so that the first and second horizontal bars 33 and 43 are vertical As shown in Fig.

The vehicle bumper beam 10 is moved close to the shape to be finally formed by the lower and upper rollers 111 and 112 and the first and second guide members 113 and 114 while moving through the welding jig 110 of the bonding unit 55 .

The bending unit 56 is configured to cause the bumper beam 10 to approach the set curvature as it is difficult to bend the bumper beam 10 at a predetermined set curvature through a single bending operation due to a spring back phenomenon And may include a plurality of bending modules that progressively bend.

For example, Fig. 15 is a configuration diagram of a bending unit.

The bending unit 56 may include first to fourth bending modules 121 to 124 installed along the conveying direction of the automotive bumper beam 10, as shown in FIG.

The first to fourth bending modules 121 to 124 each include upper and lower bending rollers 125 and 126 pivotally disposed on the base plate 59 so as to be rotatable up and down, 125 and 126 may be installed at positions higher than the upper and lower bending rollers 125 and 126 of the previously installed bending module toward the rear side of the bending unit 56.

Thus, the vehicle bumper beam 10 can be gradually bent to approach a predetermined curvature while moving through the upper and lower bending rollers 125 and 126 applied to the first to fourth bending modules 121 to 124, respectively.

The cutting unit 57 cuts the bumper beam 10, which has been formed and welded, according to the control signal of the control unit to a preset length for each type of vehicle to which the bumper beam 10 is applied.

In the present embodiment, the bottom surface of the panel is formed to correspond to the front surface of the vehicle bumper beam 10, but the present invention is not limited thereto.

That is, the present invention can be modified so that the upper surface of the panel corresponds to the front surface of the vehicle bumper beam 10, and bends the vehicle bumper beam bending downward.

To this end, the upper roll and the lower roll of each roll former 60 applied to the roll forming unit 54 are disposed at opposite positions, and a plurality of bending modules 121 to 124 applied to the bending unit 56 The bumper beam 10 can be bent to bend downward from the front end to the rear end.

The upper and lower bending rollers of the fourth bending module 124 are fixedly installed and the upper and lower bending rollers of the first to third bending modules 121 to 123 are vertically moved up and down along the bending direction, The elevation can be easily adjusted by the elevating member which is operably installed.

Next, a method of manufacturing a bumper beam for a vehicle according to a preferred embodiment of the present invention will be described in detail with reference to FIG.

16 is a process diagram for explaining a stepwise production method of a bumper beam for a vehicle according to a preferred embodiment of the present invention.

In step S10 of FIG. 16, the roller unit 51 rotates a roller made of a high-strength steel or a super-high-strength steel by the driving force of the drive motor, and sequentially supplies the panel to the leveler 52.

In step S12, the leveler 52 spreads the panel supplied from the roller unit 51 in a planar shape to flatten it, and the press unit 53 processes various holes at a position to be formed on the panel.

The plurality of roll formers 60 provided in the roll forming unit 54 in the step S14 are bent and formed by a roll forming method so that the panel has the shape of the bumper beam 10 to be formed,

At this time, the joining unit 55 joins the connecting portion 100 of the formed bumper beam 10 and the front web 21 of the supporting portion 20 in a welding manner (S16).

At least one or more bending modules 121 to 124 provided in the bending unit 56 in step S18 gradually bend the bumper beam 10 to have a preset set curvature.

In step S20, the cutting unit 57 cuts the bumped beam 10 bent according to the control signal of the control unit into a predetermined length for each type of vehicle to which the bumper beam 10 is applied.

According to the above-described process, the shock absorbing space is provided at the upper part and the lower part so as to have a cross-sectional shape of B, thereby effectively absorbing the impact energy generated at the time of vehicle collision to prevent damage to the vehicle body, A bumper beam for a vehicle can be manufactured.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

The present invention relates to a vehicle bumper beam for protecting a vehicle occupant from damage by effectively absorbing impact energy generated at the time of a vehicle collision by providing a shock absorbing space at each of the upper and lower portions to produce a B- And the like.

10: vehicle bumper beam 20:
21: front web 22, 23: first and second supporting bars
30: upper buffer portion 31: upper shock absorbing space
32, 34: first and second vertical bars 33: first horizontal bars
35: first embossing portion 40: lower buffering portion
41: Lower shock absorbing space 42, 44: Third and fourth vertical bars
43: second horizontal bar 45: second embossed part
100: Connection P: Welding point
L: welding line 50: vehicle bumper beam manufacturing apparatus
51: roller unit 52:
53: press unit 54: roll forming unit
55: bonding unit 56: bending unit
57: cutting unit 58: panel joining unit
59: base plate 60: roll former
70: roll formers 71, 72: upper and lower rolls
80: roll formers 81, 82: upper and lower rolls
83: first horizontal portion 84, 85: first and second inclined surfaces
86, 87: first and second embossing parts 88: first protrusions
89: Bending forming section 90: Rollformer
91, 92: upper and lower rolls 93: second horizontal portion
94, 95: third and fourth inclined surfaces 96, 97: third and fourth embossed parts
98: second protrusion 94, 95: first and second press-
96, 97: third and fourth embossing units 110: welding fixture
111, 112: lower and upper rollers 113, 114: first and second guide members
115: third horizontal part 116, 117: fifth and sixth embossed parts
118: third projecting portion 119, 120: third and fourth press forming portion
121 to 124: First to fourth bending modules
125, 126: upper and lower bending rollers

Claims (14)

An upper and a lower cushioning portion having a triangular cross-section formed in a rectangular shape so as to form upper and lower shock absorbing spaces at the upper and lower ends of the support portion, respectively, and a front portion of the upper and lower cushioning portions A plurality of bending sections are formed by a roll-forming forming method to form a cross section in a shape of B, a predetermined length in the horizontal direction after the molding operation, and a predetermined setting according to the front or rear shape of the vehicle Wherein the support portion includes a front web vertically disposed on the front surface so as to have a cross section in a shape of a c and a first and second support bars disposed rearwardly on the top and bottom ends of the front web, The web is formed by folding both end portions of the panel and attaching them to the rear surface of the connection portion Wherein at least one embossed portion is recessed toward the rear or protruded forward convexly so as to increase the cross-sectional area of the front portions of the upper and lower cushioning portions to reinforce the rigidity at the time of a vehicle collision, In the apparatus for producing beams,
A roller unit which winds the panel which is the raw material of the bumper beam and unwinds the panel wound by the rotation operation,
A leveler for spreading the panel supplied from the roller unit in a planar shape,
A press unit for processing various holes at a position to be formed on the panel,
A roll forming unit which is made up of a plurality of roll formers and roll-forms the panel into a desired bumper beam shape,
A joining unit joining the connection portion of the molded bumper beam and the front web of the support portion in a welding manner,
A bending unit for bending the molded bumper beam to have a preset curvature and
And a cutting unit for cutting the bent bumper beam to a preset length,
The roll forming unit includes a lower roll disposed at a position corresponding to each other and pressing downward from the upper portion of the panel and a lower roll pushing upward from the lower portion of the panel so that the flat panel is shaped into a bumper beam A plurality of roll formers for gradually forming the roll formers,
The lower rolls and the upper rolls of the plurality of front end roll formers disposed at the front end of the plurality of roll formers are bent to form upper and lower cushion portions and support portions on both sides of the connecting portion disposed at the central portion of the panel And,
A lower roll of a plurality of center roll formers disposed at a center portion of the plurality of roll formers is formed to be bent so as to form the upper and lower cushion portions and the support portion on the panel,
Wherein the first rollers are provided with a first horizontal portion corresponding to the connection portion at the center of the lower roll of the plurality of rollers,
First and second inclined surfaces for forming the first and third vertical bars of the upper and lower cushioning portions are formed on both sides of the first horizontal portion,
The first and second embossments corresponding to the first and second embossed portions formed respectively in the first and third vertical bars respectively protrude upward and protrude upward between the first horizontal portion and the first and second inclined surfaces Or concavely recessed,
The upper rolls of the plurality of center roll formers may have a first protrusion protruding downward at a center portion thereof corresponding to the shape of the support portion,
On both sides of the projecting portion, a second vertical bar of the upper cushioning portion, a first support bar of the support portion and one end of the front web, a fourth vertical bar of the lower cushion portion, a second support bar of the support portion, And a bending-forming portion for bending the bumper beam is formed. The method according to claim 1,
A panel joining unit disposed between the leveler and the roll forming unit and joining the front end of the panel wound on the newly replaced roller to the rear end of the panel supplied from the existing roller after the panel wound on the roller mounted on the roller unit is supplied, Further comprising:
Wherein the press unit performs a pre-notch operation to form various holes and trim lines to be formed in the bumper beam before molding the roll forming unit in the roll forming unit. delete 3. The method according to claim 1 or 2,
The upper and lower rollers of the plurality of rear end roll formers located at the rear end of the plurality of roll formers are connected to the connection portion of the bumper beam to be formed, the first vertical bar and the first horizontal bar of the upper buffer, Vertical bars, and second horizontal bars,
A second horizontal portion corresponding to the connection portion and third and fourth inclined surfaces corresponding to the first horizontal bar and the second horizontal bar are formed on both sides of the second horizontal portion at the center portion of the lower roll of the plurality of rear end roll formers And,
Between the second horizontal portion and the third and fourth inclined surfaces, the third and fourth embossed portions are convexly or concavely protruded upward so as to correspond to the first and second embossed portions, respectively,
The upper rolls of the plurality of rear end roll formers are protruded downward to correspond to the support portions of the bumper beams to be finally formed at the center portion,
Wherein a press-forming portion is formed on both sides of the second projection so as to press the second vertical bar of the upper cushion portion and the fourth vertical bar of the lower cushion portion downwardly in a horizontal state. 5. The method of claim 4,
The joining unit joins the front web formed by bending the both ends of the panel so as to be in contact with each other in a state of being overlapped with the rear surface of the connecting portion by welding,
Wherein the roll forming unit further comprises a plurality of roll formers for calibrating the bumper beam to which the connecting portion and the front web are joined by the joining unit, into a shape to be finally molded. 6. The method of claim 5,
The joining unit joining the connecting portion and the front web in a seam welding manner,
Wherein a pair of welding points are formed at predetermined intervals on the front surface of the connecting portion and the rear surface of the front web, respectively, in the bumper beam to which the bonding is completed. 6. The method of claim 5,
The joining unit joins the joining portion and the front web in a laser welding manner,
Wherein the welded bumper beam is formed in a zigzag shape in which welding lines continuous in welding points are vertically arranged in parallel on the front surface of the connection portion and the rear surface of the front web. 8. The method of claim 7,
Wherein the welding unit comprises a welding fixture for completing the closed end face of the bumper beam formed during the welding operation and setting the welding spot position,
The welding jig may include a lower roller for supporting the connecting portion located at the lower portion and the first and third vertical bars when welding the formed bumper beam,
An upper roller for pressing the second and fourth vertical bars located in the upper portion,
And first and second guide members for guiding both side ends of the bumper beam to form first and second horizontal bars located on both sides,
A third horizontal portion is formed in the center of the outer peripheral surface of the lower roller so as to correspond to the connection portion,
Fifth and sixth embossed portions are formed on both sides of the third horizontal portion so as to correspond to the first and second embossed portions,
A third protrusion protruding downward from the center of the outer peripheral surface of the upper roller to correspond to the support,
And third and fourth press-molded portions are formed on both sides of the third projection so as to press-form the second and fourth vertical bars in a horizontal state. The method according to claim 1,
Wherein the bending unit comprises a plurality of bending modules installed along a conveying direction of the bumper beam and gradually bending toward the set curvature,
The plurality of bending modules each comprising a pair of upper and lower bending rollers rotatably disposed on a base plate,
Wherein each of the upper and lower bending rollers is installed at a position higher than the upper and lower bending rollers of the bending module previously installed as the rear side of the bending unit. An upper and a lower cushioning portion having a triangular cross-section formed in a rectangular shape so as to form upper and lower shock absorbing spaces at the upper and lower ends of the support portion, respectively, and a front portion of the upper and lower cushioning portions A plurality of bending sections are formed by a roll-forming forming method to form a cross section in a shape of B, a predetermined length in the horizontal direction after the molding operation, and a predetermined setting according to the front or rear shape of the vehicle Wherein the support portion includes a front web vertically disposed on the front surface so as to have a cross section in a shape of a c and a first and second support bars disposed rearwardly on the top and bottom ends of the front web, The web is formed by folding both end portions of the panel and attaching them to the rear surface of the connection portion Wherein at least one embossed portion is recessed toward the rear or protruded forward convexly so as to increase the cross-sectional area of the front portions of the upper and lower cushioning portions to reinforce the rigidity at the time of a vehicle collision, A method of manufacturing a beam,
(a) spreading a panel, which is a raw material of a bumper beam supplied from the roller unit, into a flat plate using a leveler, and processing various holes at a position to be formed on the panel using a press unit,
(b) roll-forming the panel into the bumper beam shape using a roll forming unit comprising a plurality of roll formers,
(c) joining the front webs of the supporting portions, which are formed by bending both side ends of the panel, to the connecting portion formed at the center portion of the bumper beam by using the joining unit,
(d) bending the shaped bumper beam using a bending unit to have a preset curvature, and
(e) cutting the bumped beam bend using a cutting unit to a predetermined length,
Wherein the step (b) includes the steps of: (b1) using a lower roll and an upper roll of a plurality of front end roll formers disposed at a front end of the roll forming unit, Molding the lower cushioning portion and the supporting portion,
(b2) molding the upper and lower cushion portions, the support portion, and the first and second embossed portions using a lower roll and an upper roll of a plurality of center roll formers disposed at a central portion of the roll forming unit, and
(b3) a lower roll and an upper roll of a plurality of rear end roll formers disposed at a central portion of the roll forming unit, the upper and lower cushion portions and the supporting portion, and the first and second embossing portions Molding,
The lower rolls of the plurality of central portions of the plurality of central roll formers are provided with a first horizontal portion corresponding to the connecting portion at a central portion thereof and the first and third vertical bars of the upper and lower buffer portions are formed on both sides of the first horizontal portion The first and second inclined surfaces are formed between the first horizontal portion and the first inclined surface, and the first and second inclined surfaces are formed between the first horizontal portion and the first inclined surface, respectively, 2 embossing portion is convexly protruded or recessed upward toward the upper side,
The upper rolls of the plurality of central portions of the plurality of central roll formers have a first protruding portion protruding downward in the central portion so as to correspond to the shape of the support portion, A bend-shaping portion for bending a first support bar of the support portion and one end of the front web, a fourth vertical bar of the lower cushion portion, a second support bar of the support portion and the other end portion of the front web,
A plurality of rear end rollers having a first horizontal bar and a second horizontal bar formed respectively at the lower end of the upper cushion and at the lower end of the lower cushion, Third and fourth inclined surfaces corresponding to the horizontal bars are formed,
Between the second horizontal portion and the third and fourth inclined surfaces, the third and fourth embossed portions are convexly or convexly protruded upward so as to correspond to the first and second embossed portions, respectively,
Wherein the upper roll of the plurality of rear end roll formers protrudes downward to correspond to the support portion of the bumper beam to be finally formed at the center portion,
Wherein a press-forming portion is formed on both sides of the second projection so as to press the second vertical bar of the upper cushion portion and the fourth vertical bar of the lower cushion portion downward so as to be in a horizontal state. delete 11. The method of claim 10, wherein step (c)
(c1) joining the front portion web and the connecting portion by a laser welding method before the final roll-forming of the bumper beam is completed using the joining unit; and
(c2) a step of calibrating the bumper beam having been joined by using a plurality of calibrating roll formers provided at the rear end of the joining unit, into a sectional shape to be finally molded. 13. The method of claim 12,
In the step (c1), the joining unit joins the connecting portion and the front web in a seam welding manner,
Wherein a pair of welding points are formed at predetermined intervals on the front surface of the connecting portion and the rear surface of the front web, respectively, in the bumper beam having been joined. 13. The method of claim 12,
In the step (c1), the joining unit joins the connecting portion and the front web in a laser welding manner,
Wherein the welded bumper beam is formed in a zigzag shape in which welding lines continuous with welding points are vertically arranged in parallel on a front surface of the connecting portion and a rear surface of the front web.

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