KR20170057959A - Formed beam fabrication method - Google Patents

Formed beam fabrication method Download PDF

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Publication number
KR20170057959A
KR20170057959A KR1020150161507A KR20150161507A KR20170057959A KR 20170057959 A KR20170057959 A KR 20170057959A KR 1020150161507 A KR1020150161507 A KR 1020150161507A KR 20150161507 A KR20150161507 A KR 20150161507A KR 20170057959 A KR20170057959 A KR 20170057959A
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KR
South Korea
Prior art keywords
forming
cooling water
forming beam
mold
roll
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Application number
KR1020150161507A
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Korean (ko)
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KR101760280B1 (en
Inventor
최석준
이문용
Original Assignee
주식회사 성우하이텍
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Priority to KR1020150161507A priority Critical patent/KR101760280B1/en
Publication of KR20170057959A publication Critical patent/KR20170057959A/en
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Publication of KR101760280B1 publication Critical patent/KR101760280B1/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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • 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

Abstract

Disclosed is a method of producing a molded beam. According to an embodiment of the present invention, the method comprises: a roll-forming step of roll-forming a supplied panel through a multistage roll-former; a welding step of welding and combining one side of a molded beam; a heating step of heating the roll-formed and welded molded beam at a predetermined temperature; and a bending and quenching step of bending the heated molded beam at a set curvature using a hot stamping device, and spraying cooling water onto a surface of the molded beam to be quenched. The hot stamping device includes a mold having a curvature for curvature-molding the molded beam, and a cooling water spraying hole to spray cooling water onto the surface of the molded beam is formed on the inner surface of the mold facing the surface of the molded beam. The cooling water sprayed from the cooling water spraying hole quenches the surface of the molded beam, and is able to be discharged to the outside by passing through a gap between the mold and the molded beam.

Description

[0001] FORMED BEAM FABRICATION METHOD [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forming beam manufacturing method, and more particularly to a forming beam forming method in which a forming beam produced through a roll forming process and a welding process is heated to a high temperature and hot- will be.

Generally, the roll forming method is a method in which a roll former unit which rolls a coil and constitutes a pair of an upper roll and a lower roll is passed through a roll former unit which is arranged in a row in multiple stages and is bent and formed into various shapes. A straight type beam current which is bent and formed into various shapes is produced.

In this roll forming method, an uncoiling step is performed in which a coil C serving as a material is fed through an uncoupler in front of a processing line, and a coil C released from the uncoiler is fed to a flat panel P And the feeding step for feeding is performed.

Following the feeding step, a piercing step is carried out to form holes for various uses for assembling the beam to be formed in the panel P supplied from the feeding step, using a piercing press at its rear side.

The piercing step is followed by a roll forming step in which the pierced panel P is subjected to roll foaming in the form of a forming beam to be obtained by successively bending through a roll forming unit having at least two roll formers disposed thereon It proceeds.

Thereafter, in the rear of the roll forming step, a welding step is performed in which the formed forming beam is roll-formed and welded to form a closed end face.

Following the welding step, a bending step may be performed to bend the welded formed beam B2 to a predetermined standard through a cutting press to produce a molded product having a predetermined length.

However, when the molded beam having a closed end face formed with the welded portion is hot-stamped and quenched, the welded portion is not cooled properly, the welded portion is uneven and the weld strength is lowered. Can be degraded.

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

An object of the present invention is to provide a method of forming a welded beam by curving a molded beam having a closed end surface formed with a welded portion by curvilinear molding to prevent the welded portion from being cooled properly during quenching, The present invention provides a method of manufacturing a forming beam that prevents a weld portion from being easily separated when a bumper is used.

A forming beam manufacturing method according to one or more embodiments of the present invention includes a roll forming step of roll forming a supplied panel through a multi-stage roll former, a welding step of welding one side of the forming beam to be welded, A heating step of heating the shaped forming beam welded to a predetermined temperature, bending the heated forming beam by a set curvature using a hot stamping apparatus, And may include a quenching step.

The hot stamping apparatus includes a mold having a curvature for curvature-shaping the forming beam, and an inner surface of the mold facing the surface of the forming beam is provided with a cooling water jetting hole Can be formed.

The cooling water injection holes may be set to inject cooling water on both outer sides of the welded portion formed in the forming beam.

The cooling water injection holes may be formed at predetermined intervals along the longitudinal direction of the forming beam.

Wherein the mold comprises a lower mold having a shape corresponding to a lower side of the forming beam and a upper mold having a shape corresponding to an upper side of the forming beam, wherein the forming beam is disposed between the lower mold and the upper mold, And the lower mold are combined to curvature-shape the forming beam, and the cooling water can be injected onto the surface of the molding beam in a state where the lower mold and the upper mold are combined.

The forming beam is made of boron steel having a strength of 600 MPa to 700 MPa before heating and may have a strength of 1500 MPa or more through heating and quenching.

In the heating step, the forming beam may be heated to 900 degrees Celsius.

A forming beam manufacturing method according to an embodiment of the present invention includes a roll forming step of roll-forming a supplied panel through a multi-stage roll former, a welding step of welding one side of the forming beam, And a bending and quenching step of bending the heated forming beam at a set curvature using a hot stamping apparatus and injecting cooling water onto the surface of the forming beam to quench the heated forming beam, In the quenching step, the cooling water is injected onto the surface of the curved forming beam through the cooling water injection hole formed in the mold of the hot stamping apparatus. The injected cooling water quenches the surface of the forming beam, And can be discharged to the outside through a gap.

The cooling water injection holes may be set to inject cooling water onto both outer sides of the welded portion formed in the forming beam.

The forming beam is made of boron steel having a strength of 600 MPa to 700 MPa before heating, and has a strength of 1500 MPa or more through heating and quenching, and in the heating step, the forming beam can be heated to 900 degrees centigrade.

In the roll forming forming method according to the embodiment of the present invention, curved forming is performed by hot-stamping a molding beam having a closed end face formed with a weld portion, cooling water is directly sprayed onto the welding portion during quenching, The structure of the welded portion is made uniform, and the welding strength is improved, so that the welded portion is not easily separated when the forming beam is used for the bumper.

Particularly, in the process of bending molding using the mold in a state where the forming beam is heated to a high temperature, the cooling water is directly supplied to the surface and the welded portion of the forming beam through the cooling water channel formed inside the upper and lower molds, .

1 is a flowchart showing a forming beam forming method according to an embodiment of the present invention.
FIG. 2 is an overall sectional view showing a state in which a forming beam is clamped with a mold for curvature-forming a forming beam according to an embodiment of the present invention.
3 is a partial perspective view of a topography in a mold for curvature-forming a forming beam according to an embodiment of the present invention.
4 is a cross-sectional view of a forming beam according to an embodiment of the present invention.
5 is a perspective view of a bumper beam unit 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.

It is to be understood, however, that the present invention is not limited to the illustrated embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention. .

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

In the following description, the names of the components are denoted by the first, second, etc. in order to distinguish them from each other because the names of the components are the same and are not necessarily limited to the order.

FIG. 1 is a flow chart showing a forming beam manufacturing method according to an embodiment of the present invention, and FIG. 4 is a sectional view of a forming beam according to an embodiment of the present invention.

Referring to FIG. 1, the forming beam forming method includes a roll forming step S100, a welding step S110, a heating step S120, a curvilinear molding and quenching step S130, and a stay assembling step S140.

In the roll forming step S100, the panel P is sequentially bent and formed through a roll forming unit in which at least two roll formers are disposed to form a forming beam.

4, welded parts 300 are formed on both sides of the roll-formed formed beam 310. The welded part 300 is welded on both sides of the formed beam 310, And the forming beams 310 are joined to each other by the welding portion 300 to form a closed end face.

After the welding step S110, a heating step S120 for heating the welded forming beam to a set temperature is performed. In the embodiment of the present invention, the shaping beam 310 made of high-tensile steel such as boron steel can be heated and quenched, so that a super-high-strength local shape can be machined.

In particular, the forming beam 310 has an intrinsic strength of 600 to 700 MPa, which is the intrinsic strength of a high tensile steel such as a boron steel, and can be set to an intensity of 1500 MPa or more by heating and quenching.

In the curvature forming and quenching step S130, the forming water is formed directly in the roll forming step S100 and the welding step S110, while the curvature is formed on the forming beam 310, and the cooling water is directly sprayed.

In the stay assembly step S140, the stay 400 and the reinforcing member 410 are joined to the forming beam 310 having a curvature, thereby completing the bumper unit 500. [

FIG. 2 is an overall sectional view showing a state in which a forming beam is clamped with a mold for curvature-forming a forming beam according to an embodiment of the present invention.

2, the mold for bending the forming beam 310 includes a top mold 200 and a bottom mold 210, and the molding beam 310 (see FIG. 2) is formed inside the top mold 200 and the bottom mold 210, And a cooling water channel 220 for supplying cooling water to the surface of the cooling water channel 220 are formed.

The forming beam 310 is formed with a welded part 300 that completes an open end face with a closed end face and the upper mold 200 and the lower mold 210 are provided with molding beams 310 corresponding to the welded parts 300 And a cooling water channel 220 for directly supplying cooling water to the surface are formed.

The forming beam 310 bends both end portions 244 of the panel inward and joins both end portions 244 of the panel to the one side 242 of the panel through the welding portion 300, And has both ends 242 and 244 joined to each other.

A protrusion 250 protrudes downward from a central portion of the lower surface of the upper mold 200 and a lower surface of the protrusion 250 is in close contact with both ends 244 of the panel, One side and both ends 242 and 244 are in close contact with each other by the lower mold 210 and the protrusion 250 of the upper mold 200. The coolant flow channel 220 formed in the protrusion 250 and the lower mold 210 The cooling water is directly injected onto the surface of the welded part 300 through the cooling water flow path 220 formed in the cooling water passage 220.

That is, during the bending molding using the mold in the state where the forming beam 310 is heated to a high temperature, the molding beam 310 is formed through the cooling water flow path 220 formed in the upper mold 200 and the lower mold 210 The cooling water can be directly supplied to the surface of the welding part 300 to easily quench the welding part 300 while bending the forming beam 310.

Therefore, in the embodiment of the present invention, the forming beam 310 in the form of a closed end where the welding portion 300 is formed is subjected to curvilinear molding by hot stamping, and the cooling water is sprayed directly onto the surface of the welding portion 300 during quenching, The welding portion 300 is sufficiently cooled to uniformize the structure of the welded portion 300 and improve the welding strength so that the welded portion is not easily separated during the collision when the forming beam 310 is used for the bumper.

3 is a partial perspective view of a topography in a mold for curvature-forming a forming beam according to an embodiment of the present invention.

3, a cooling water injection hole 500 for directly supplying cooling water to the surface of the forming beam 310 is formed in the upper mold 200, and the cooling water injection hole 500 is formed in the forming beam 310, As shown in Fig.

The cooling water injected to the surface of the forming beam 310 through the lower mold 210 and the cooling water injection hole 500 formed in the upper mold 200 is transferred to the upper mold 200 and the forming beam 310 and the gap between the lower mold 210 and the forming beam 310 to the outside of the upper mold 200 and the lower mold 210.

5 is a perspective view of a bumper beam unit according to an embodiment of the present invention.

5, the bumper beam unit 500 includes a forming beam 310 formed with a predetermined curvature, a reinforcing member 410 coupled to an upper portion of the center of the forming beam 310, The forming beam 310 manufactured according to the embodiment of the present invention uniformizes the structure of the welded portion 300 and improves the welding strength so that the welding portion 300 300 are not easily separated.

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.

200: Upper mold 210: Lower mold
220: cooling water channel 300: welded portion
242: one side of the panel 244: both ends of the panel
250: protrusion 500: cooling water injection hole
310: forming beam 400: stay
410: reinforcing member

Claims (10)

A roll forming step of roll-forming the supplied panel through a plurality of roll formers;
A welding step of welding one side of the forming beam and joining the same;
A heating step of heating the shaped beam that has been roll-formed and welded to a predetermined temperature; And
A bending and quenching step of bending the heated forming beam with a set curvature using a hot stamping device and then directly injecting cooling water onto the surface of the forming beam to quench the surface;
And forming a forming beam on the substrate. The method according to claim 1,
The hot stamping apparatus includes:
And a mold having a curvature for curvature-shaping the forming beam,
And a cooling water injection hole for injecting cooling water onto the surface of the forming beam is formed on an inner surface of the mold facing the surface of the forming beam. 3. The method of claim 2,
The cooling water injection hole
And the cooling water is injected onto both outer side surfaces of the welded portion formed on the molding beam. 3. The method of claim 2,
The cooling water injection hole
Wherein the forming beams are formed at predetermined intervals along the longitudinal direction of the forming beam. 3. The method of claim 2,
The mold
A lower mold having a shape corresponding to a lower side of the forming beam; And
And a top shape having a shape corresponding to an upper side of the forming beam,
The forming beam is disposed between the lower mold and the upper mold, the lower mold and the lower mold are combined to curvature-shape the forming beam,
Wherein the cooling water is injected onto the surface of the molding beam in a state where the lower mold and the upper mold are combined. The method according to claim 1,
Wherein the forming beam is made of boron steel having a strength of 600 MPa to 700 MPa before heating and has a strength of 1500 MPa or more after being heated and quenched. The method according to claim 1,
Wherein in the heating step, the forming beam is heated to 900 degrees Celsius. A roll forming step of roll-forming the supplied panel through a plurality of roll formers;
A welding step of welding one side of the forming beam and joining the same;
A heating step of heating the shaped beam that has been roll-formed and welded to a predetermined temperature; And
A bending and quenching step of curving the heated forming beam with a set curvature using a hot stamping apparatus and injecting cooling water onto the surface of the forming beam for quenching; , ≪ / RTI &
In the quenching step, cooling water is injected onto a surface of a curved forming beam through a cooling water injection hole formed in a mold of the hot stamping apparatus. The injected cooling water quenches the surface of the forming beam, Is discharged to the outside through a gap between the first and second molds. 9. The method of claim 8,
The cooling water injection hole
Wherein the mold is set in the mold so as to inject cooling water onto both outer side surfaces of the welded portion formed on the molding beam. 9. The method of claim 8,
Characterized in that the forming beam is made of boron steel having a strength of 600 MPa to 700 MPa before heating and has a strength of 1500 MPa or more through heating and quenching and in the heating step the shaping beam is heated to 900 DEG C Forming beam forming method.
KR1020150161507A 2015-11-18 2015-11-18 Formed beam fabrication method KR101760280B1 (en)

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Application Number Priority Date Filing Date Title
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KR101760280B1 KR101760280B1 (en) 2017-07-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018002277U1 (en) 2017-05-10 2018-05-18 Hyundai Mobis Co., Ltd. Brake caliper noise prevention device for a vehicle brake
CN108620494A (en) * 2018-05-04 2018-10-09 芜湖众梦电子科技有限公司 A kind of cooling device for automobile die
CN110252896A (en) * 2019-07-18 2019-09-20 上海凌云汽车模具有限公司 A kind of quenching technical and its hot forming tool of thermoformed part

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018002277U1 (en) 2017-05-10 2018-05-18 Hyundai Mobis Co., Ltd. Brake caliper noise prevention device for a vehicle brake
CN108620494A (en) * 2018-05-04 2018-10-09 芜湖众梦电子科技有限公司 A kind of cooling device for automobile die
CN108620494B (en) * 2018-05-04 2020-06-02 万德福科技(广东)有限公司 Cooling device for automobile mold
CN110252896A (en) * 2019-07-18 2019-09-20 上海凌云汽车模具有限公司 A kind of quenching technical and its hot forming tool of thermoformed part

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