KR20160114309A - Roll forming method - Google Patents

Roll forming method Download PDF

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Publication number
KR20160114309A
KR20160114309A KR1020150040604A KR20150040604A KR20160114309A KR 20160114309 A KR20160114309 A KR 20160114309A KR 1020150040604 A KR1020150040604 A KR 1020150040604A KR 20150040604 A KR20150040604 A KR 20150040604A KR 20160114309 A KR20160114309 A KR 20160114309A
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KR
South Korea
Prior art keywords
hardware
roll
forming
panel
roll forming
Prior art date
Application number
KR1020150040604A
Other languages
Korean (ko)
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KR101680565B1 (en
Inventor
최수영
이문용
Original Assignee
주식회사 성우하이텍
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Priority to KR1020150040604A priority Critical patent/KR101680565B1/en
Publication of KR20160114309A publication Critical patent/KR20160114309A/en
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Publication of KR101680565B1 publication Critical patent/KR101680565B1/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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/14—Projection welding

Abstract

Disclosed by the present invention is a roll forming method which enables hardware to be positioned in a formed product. According to an embodiment of the present invention, the roll forming method comprises: (S1) an uncoiling step of unwinding a coil supplied through an uncoiler in a front side of a processing line; (S2) a straightening step of straightening a coil unrolled out from the uncoiler into a flat panel through a straightener; (S3) a piercing step of processing multipurpose holes to assemble a forming beam through a brake press in the panel supplied from the straightener; (S4) a hardware connecting step of welding and connecting hardware to assemble components using a hardware welding machine corresponding to the holes on the panel supplied from the brake press; and (S5) a roll forming step of forming a roll shape with a forming beam having a predetermined shape by sequentially bending the panel supplied from the hardware welding machine through the roll forming unit formed with roll formers of at least 10 phases.

Description

[0001] ROLL FORMING METHOD [

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a roll forming method and, more particularly, to a roll forming method in which, during roll forming of a steel sheet, various hardware is preliminarily bonded to a steel plate through projection welding, Roll forming method.

Generally, a roll forming method is a method in which a roll forming machine in which a roll forming machine in which a coil is loosened and a pair of an upper forming roll and a lower forming roll are arranged in a row is disposed in a row, And is also applicable to the manufacture of straight type beam streams which are bent and formed into various shapes.

FIG. 1 is a conceptual diagram of a stepwise process according to a general roll forming method.

That is, in the general roll forming method, an uncoiler 201 for uncoiling a coil 200 to be fed is formed in front of a processing line to proceed to an uncoiling step (S110), and a coil unwound from the uncoiler 201 The flattening panel 210 is provided with a straightener 203 behind the flattening panel 210 to proceed the straightening step S120.

A brake press 205 for machining holes for various purposes for assembling the beam to be formed in the panel 210 supplied from the straightener 203 is provided at the rear of the straightener 203, ).

A roll forming unit 207 composed of at least ten roll formers R1 to R7 (not shown) is disposed at the rear of the brake press 205, and the uncoiler 201, the straightener 203 And the panel 210 supplied through the brake press 205 are successively folded to form a forming beam 220 to be rolled.

A welding step (S150) for advancing the welding work to the respective welding positions of the roll-formed forming beams 220 by using a welding unit 209 such as a roll spot welding machine is performed to the rear of the roll forming unit 207 .

At the rear of the welding unit 209, the bending step (S160) of forming the welded forming beam 230 supplied from the welding step S150 to a predetermined curvature is performed using the round bender 211.

A cutting press 213 for cutting the curved forming beam 240 to a predetermined size is formed in the rear of the round bender 211 so as to perform a cutting step S170 for cutting according to the standard of the finished product for commercialization.

Through this roll forming method, the finished forming beam 250 can be produced as shown in FIG.

The forming beam 250 produced by such a roll forming method is manufactured by joining hardware 300 such as a weld nut or a pop nut for precision machining for fitting dimensions or the like or assembling with other parts in a subsequent process, do.

However, when the finished product forms a closed end surface like the above-described forming beam 250, the hardware 300 such as a weld nut or a pop nut is bonded to the outer surface of the forming beam 250, There is a problem in that the new hardware 300 may be applied to the outer surface of the finished product, which may cause interference on the assembly.

An embodiment of the present invention is to provide a roll forming method in which hardware is placed inside of a molded product after roll forming, by joining various hardware in advance through projection welding on a steel sheet during roll forming of the steel sheet.

In one or more embodiments of the present invention, in the front of the process line, an uncoil step (S1) for releasing the coil supplied through the uncoiler; A straightening step (S2) for straightening the coil unwound from the uncoiler to a flat panel through a straightener; A piercing step (S3) of processing holes for various purposes for assembling a forming beam through a brake press on a panel supplied from the straightener; A hardware bonding step (S4) of welding and assembling hardware for assembling parts using a hardware welder corresponding to the holes on the panel supplied from the brake press; And a roll forming step (S5) of sequentially bending the panel supplied from the hardware welder through a roll forming unit composed of at least 10 roll formers and roll forming with a forming beam having a predetermined shape can do.

A welding step (S6) of welding and joining a welding spot of a forming beam supplied from the roll forming unit through a roll spot welding machine; A bending step (S7) of forming a forming beam supplied from the roll spot welding machine to a predetermined curvature using a round bender; And a cutting step (S8) of cutting a forming beam supplied from the round bender to a predetermined standard using a cutting press.

Further, the roll forming step may be performed by forming a receiving groove around the outer peripheral surface of the forming roll corresponding to the surface on the steel plate panel to which the hardware is bonded, so as to avoid interference with the hardware.

Also, the hardware welder may be a projection welder which is operated by a robot.

In addition, the hardware may comprise a weld nut or a pop nut for component assembly.

In the embodiment of the present invention, in the roll forming of the steel sheet, various hardware is preliminarily bonded on the steel sheet through projection welding, and then hardware such as weld nuts and pop nuts are positioned inside the molded product by roll forming It is possible to eliminate the cause of interference in the assembly.

Further, in the roll forming step, it is possible to assemble the hardware such as the weld nut or the pop nut all at once and to eliminate the additional welding step after the roll forming step, thereby improving the productivity.

FIG. 1 is a conceptual diagram of a stepwise process according to a general roll forming method.
2 is a perspective view of a forming beam produced using a general roll forming method.
3 is a step-by-step process diagram according to a roll forming method according to an embodiment of the present invention.
4 is a process diagram of a hardware bonding step applied to a roll forming method according to an embodiment of the present invention.
5 is a partial process diagram of a roll forming step applied to a roll forming method according to an embodiment of the present invention.
6 is a sectional view of a forming beam produced according to a roll forming method according to an embodiment of the present invention.

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

4 is a partial process diagram of a roll forming step according to a roll forming method according to an embodiment of the present invention, and FIG. 5 is a sectional view showing a step of the roll forming method according to an embodiment of the present invention FIG. 6 is a cross-sectional view of a forming beam produced according to a roll forming method according to an embodiment of the present invention.

3, a roll forming method according to an embodiment of the present invention includes rolling a panel 20 of a steel plate through roll forming units (R1, R2, R3, R6, and R7, not shown) Thereby forming a shaping beam 40 having a predetermined shape.

In this case, the hardware 55 (see FIG. 4) is welded on the design position on the panel 20 before the roll forming step S5 by welding using the hardware welder 4, The hardware 55 can be placed inside the molded product 50 to eliminate the cause of interference in assembly with other components and to perform additional processes after the roll forming process So that it can be excluded.

As shown in FIG. 3, an entire roll forming apparatus for forming a roll forming method according to an embodiment of the present invention includes an uncoiler 1 formed in front of a processing line, give.

A straightener 2 is arranged behind the uncoiler 1 so that the coil 10 uncoiled from the uncoiler 1 is spread to the flat panel 20.

A brake press 3 is provided behind the straightener 2 so as to form holes H for various purposes for assembling a forming beam on the panel 20 supplied from the straightener 2 .

4, a hardware welder 4 is formed at the rear of the brake press 3, and a hardware 55 for assembling parts is attached to a hole H on a panel 20, which is supplied through the brake press 3, Respectively.

The panel 20 is sequentially bent at the rear side of the hardware welder 4 so that the hardware 55 bonded on the panel 20 is positioned inside and rolled into a closed forming beam 30 The roll forming unit 5 is constituted.

Here, the roll forming unit 5 includes at least ten roll formers R1, R2, R3, R6, and R7 (not shown) arranged in a row.

A roll spot welder 6 is formed behind the roll forming unit 5 to roll-weld the welded portion of the forming beam 30.

At the rear of the roll spot welder 6, a round bender 7 is formed to form the welded formed beam 30 at a certain curvature.

A cutting press 8 for cutting a curved forming beam 40 to a predetermined size is formed at the rear of the round bender 7 to cut the forming beam 40 according to the standard of finished product for commercialization, , See Fig. 6).

Hereinafter, the roll forming method according to the embodiment of the present invention will be described in detail with reference to FIG. 3 to FIG.

First, referring to FIG. 3, an uncoil step S1 is carried out to uncoil the coil 10 to be supplied for molding by using the uncoiler 1 in front of the process line.

At this time, in the embodiment of the present invention, a high-strength steel sheet having a coil material of 1,500 MPa or less and an elongation percentage of 5% or more can be applied.

Following the uncoil step S1, straightening the coil 10 uncoiled from the uncoil step S1 to the panel 20 using the straightener 2 at the back of the uncoiler 1, (S2). ≪ / RTI >

Subsequently, at the rear of the straightener 2, a hole H for various purposes for assembling a forming beam is formed on the panel 20 supplied from the straightening step S2 by using a brake press 3 The piercing step S3 is performed.

4, at the rear of the brake press 3, a hardware welding machine 4 is used to mount the component assembly hardware 4 corresponding to the holes H on the panel 20 supplied from the piercing step S3, (S4) for joining the metal plate (55).

That is, in the hardware joining step S4, as shown in FIG. 4, a welded joint is formed corresponding to the hole H formed on the panel 20 passing the die 4c through the hardware welder 4, Or the hardware 55 such as a pop nut is welded and welded by projection welding by electrical resistance.

The hardware welder 4 preferably comprises a projection welder 4b acting on the robot 4a because the hardware 55 must be joined while the panel 20 is moving. The hardware 55 is accurately welded to the hole H formed in the panel 20 on the die 4c while moving the projection welding machine 4b in accordance with the moving speed of the panel 20 in the process direction.

In the embodiment of the present invention, examples of the hardware 55 are a weld nut or a pop nut for component assembly, but the present invention is not limited thereto. The hardware 55 may be a hardware 55 for welding between components Applicable.

As described above, the panel 20 to which the hardware 55 such as a world nut or a pop nut is bonded through the hardware joining step S4 includes a multi-stage roll formers R1, R2, R3, R6, The roll forming step S5 is performed in which the forming beam 30 is supplied to a roll forming unit 5 composed of a plurality of roll forming units 5 and a closed end surface shaping beam 30 to be sequentially bent.

5, in the roll forming step S5, the hardware 55 is interfered with the hardware 55 along the periphery of the forming roll FR1 corresponding to the surface on the panel 20 to which the hardware 55 is bonded, And the receiving groove G is formed so as to avoid the bosses.

The forming roll FR1 having the receiving groove G is formed only on the upper forming roll FR1 or the lower forming roll FR2 which is directly in contact with the surface on the panel 20 to which the hardware 55 is joined, And can be applied to the initial upper forming roll FR1 until the panel 20 forms the closed end face through the roll forming, as in the embodiment of the present invention.

After the roll forming step S5, a spot welder 6 is attached to the rear of the roll forming unit 5 through a roll spot welder 6 for joining both ends of the roll formed forming beam 30 SW) is advanced to the welding step S6.

Subsequently to the welding step S6, the bending step S7 for forming the welded forming beam 30 supplied from the welding step S6 to a predetermined curvature is carried out by using the round bender 7.

After the bending step S7, a cutting press 8 is provided at the rear of the round bender 7 to cut the curved forming beam 40 to a predetermined standard, The process proceeds to step S8.

6, the molded product 50 produced according to the roll forming method according to the embodiment of the present invention has two closed end faces SP1 and SP2, and the inside of the one closed end face SP2 And is connected to the hardware 55 with respect to the hole H.

Therefore, in the roll forming method according to the embodiment of the present invention, the high-strength panel 20 having a strength of 1,500 MPa or less is rolled through a multi-stage roll formers R1, R2, R3, R6 and R7 The hardware 55 is welded on the design position on the panel 20 before the roll forming step S5 by using the hardware welder 4 in the process of forming the forming beam 30 of the roll forming So that the hardware for assembling parts 55 can be positioned inside the closed end surface SP2 of the molded product 50 after the molding.

Thus, the hardware 55 can eliminate the interference of the molded product 50 with the other parts, and the additional welding process can be excluded after the roll-forming molding process for assembling the hardware 55.

Further, in the roll forming step, the hardware 55 such as a weld nut or a pop nut can be assembled at one time during the process, thereby eliminating the additional process, thereby improving the productivity.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Various modifications and variations are possible within the scope of the appended claims.

1: Uncoiler
2: Straightener
3: Brake press
4: Hardware welder
4a: Robot
4b: projection welding machine
4c: Die
5: Roll forming unit
6: Roll spot welder
7: Round Bender
8: Cutting press
10: Coil
20: Panel
30, 40: forming beam
50: molded article
55: Hardware
SP1, SP2: closed end face
FR1, FR2: upper and lower forming rolls

Claims (10)

A roll forming method for roll forming a panel through a multi-stage roll former to form a forming beam of a predetermined shape,
A method of roll forming comprising the steps of: prior to the roll forming step of the panel, welding the hardware on a design position on the panel using a hardware welder, and then welding it to the roll forming step. The method according to claim 1,
The design position on the panel
Wherein the piercing hole is a position of a piercing hole formed on the panel in the piercing step before the roll forming step. The method according to claim 1,
The roll forming step
And a receiving groove is formed along the periphery of the outer peripheral surface of the forming roll corresponding to the surface on the panel to which the hardware is bonded so as to avoid interference with the hardware. The method according to claim 1,
The hardware welder
And a projection welding machine acting on the robot. The method according to claim 1,
The hardware
A method of roll forming comprising a weld nut or a pop nut for component assembly. An uncoiling step (S1) for loosening the coil supplied through the uncoiler, in front of the processing line;
A straightening step (S2) for straightening the coil unwound from the uncoiler to a flat panel through a straightener;
A piercing step (S3) of processing holes for various purposes for assembling a forming beam through a brake press on a panel supplied from the straightener;
A hardware bonding step (S4) of welding and assembling hardware for assembling parts using a hardware welder corresponding to the holes on the panel supplied from the brake press;
A roll forming step (S5) of sequentially bending a panel supplied from the hardware welder through a roll forming unit composed of at least ten rollers and roll forming the formed beam into a predetermined shaped beam;
/ RTI > The method according to claim 6,
A welding step (S6) of welding and joining a welding spot of a forming beam supplied from the roll forming unit through a roll spot welding machine;
A bending step (S7) of forming a forming beam supplied from the roll spot welding machine to a predetermined curvature using a round bender;
A cutting step (S8) of cutting a forming beam supplied from the round bender to a predetermined standard using a cutting press;
Further comprising the steps of: 8. The method according to claim 6 or 7,
The roll forming step
And a receiving groove is formed along the periphery of the outer peripheral surface of the forming roll corresponding to the surface on the panel to which the hardware is bonded so as to avoid interference with the hardware. 8. The method according to claim 6 or 7,
The hardware welder
And a projection welding machine acting on the robot. 8. The method according to claim 6 or 7,
The hardware
A method of roll forming comprising a weld nut or a pop nut for component assembly.
KR1020150040604A 2015-03-24 2015-03-24 Roll forming method KR101680565B1 (en)

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KR1020150040604A KR101680565B1 (en) 2015-03-24 2015-03-24 Roll forming method

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KR101680565B1 KR101680565B1 (en) 2016-11-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113118230A (en) * 2021-04-21 2021-07-16 中冶赛迪技术研究中心有限公司 Closed-type steel hot roll bending production composite process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102396221B1 (en) * 2017-12-29 2022-05-10 주식회사 성우하이텍 Roll forming method and bumper beam manufactured using the method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5083643B2 (en) * 2006-07-18 2012-11-28 好高 青山 Welding equipment for welding shaft-shaped parts to pipe members
KR101137252B1 (en) * 2009-06-08 2012-04-20 주식회사 성우하이텍 Roll forming system and method thereof, and formed article prepared by using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113118230A (en) * 2021-04-21 2021-07-16 中冶赛迪技术研究中心有限公司 Closed-type steel hot roll bending production composite process
CN113118230B (en) * 2021-04-21 2023-05-12 中冶赛迪技术研究中心有限公司 Composite technology for producing closed section steel through hot roll bending

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