KR20150080353A - Heating device of hot stamping panel - Google Patents

Heating device of hot stamping panel Download PDF

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Publication number
KR20150080353A
KR20150080353A KR1020130169448A KR20130169448A KR20150080353A KR 20150080353 A KR20150080353 A KR 20150080353A KR 1020130169448 A KR1020130169448 A KR 1020130169448A KR 20130169448 A KR20130169448 A KR 20130169448A KR 20150080353 A KR20150080353 A KR 20150080353A
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KR
South Korea
Prior art keywords
heating
hot stamping
stamping material
molds
housing
Prior art date
Application number
KR1020130169448A
Other languages
Korean (ko)
Inventor
김지찬
이문용
Original Assignee
주식회사 성우하이텍
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Filing date
Publication date
Application filed by 주식회사 성우하이텍 filed Critical 주식회사 성우하이텍
Priority to KR1020130169448A priority Critical patent/KR20150080353A/en
Publication of KR20150080353A publication Critical patent/KR20150080353A/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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

 A hot stamping material heating apparatus is disclosed. A hot stamping material heating apparatus according to an embodiment of the present invention is a material heating apparatus for locally thermally processing a hot stamping material formed by differently joining steel sheet materials to each other, the apparatus comprising: a heating housing installed on a base; First and second lower molds installed in contact with each other on both sides of the base in the heating housing; First and second upper molds disposed in correspondence with upper portions of the first and second lower molds in mutual contact with each other in the heating housing; A driving cylinder installed at the center of the outer upper surface of the heating housing and connected to the upper side of the first and second upper molds through an upper surface of the heating housing; And a heating source which is provided inside each of the space portions and has a space portion formed on mutually corresponding surfaces of the first lower half portion and the corresponding first upper half portion,

Description

HEATING DEVICE OF HOT STAMPING PANEL [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hot stamping material heating apparatus, and more particularly, to a hot stamping material heating apparatus capable of locally heat-treating a hot stamping material made of different kinds of steel sheets.

Generally, a vehicle body including bumper beams of an automobile is formed by pressing a steel-based steel sheet material, and the rigidity of these steel sheet materials greatly affects the collision stability of the vehicle.

Accordingly, in order to satisfy the rigidity and weight reduction of the steel sheet material at the same time, hot stamping technology which is a hot press forming technique using the boron steel sheet 111 has been actively studied as shown in Fig.

That is, in the hot stamping technique, the boron steel plate 111 is heated at an appropriate temperature (about 900 ° C.), molded at once in the press die 113, and then rapidly cooled to manufacture the high strength body member 115 Molding technology.

The boron steel sheet 111 is a steel sheet to which a small amount of boron (B) is added. Boron is segregated in an atomic state at the austenite grain boundary under the above-mentioned optimum temperature condition, and the free energy of the austenite grain boundary is lowered , The generation of pro-eutectoid ferrite nuclei is suppressed and the hardening ability of the steel (the ability of the steel to be hardened by martensite formation at the time of heat treatment) is remarkably improved.

The hot stamping method using the boron steel plate 111 differs from the conventional method using a high strength steel, in that a boron steel sheet 111 having a ferrite structure having a tensile strength of about 500 to 800 MPa before molding is heat- Followed by rapid cooling to produce a molded article of martensite structure having a high tensile strength of about 1300 to 1600 MPa.

Accordingly, the hot stamping molded article can have a strength of 4 to 5 times higher than that of a general steel plate part, but its weight can be reduced by up to 40% compared with the conventional one, which is advantageous in achieving both weight saving and high strength characteristics.

However, the conventional hot stamping technique as described above can meet the high strength and light weight, and can further enhance the impact energy absorption performance, but it has a problem that the material cost and the processing cost are increased.

Further, in the vehicle, since it is not necessary to increase the strength of the steel sheet material applied to the entire body of the vehicle, only the portion requiring high strength is used as the boron steel sheet, and a soft steel sheet is applied to the remaining portions.

In the case of using the boron steel plate and the soft steel sheet bonded together as described above, it is required to heat only the portion of the boron steel sheet so that hot stamping can be performed without heating the soft steel sheet portion.

The embodiment of the present invention can be applied to a hot stamping material in which different steel sheets are bonded to each other in a hot stamping material so that the heat treatment can be locally performed only on a portion requiring heat processing, Heating device.

In one or more embodiments of the present invention, there is provided a workpiece heating apparatus for locally thermally processing a hot stamping material formed by heterogeneously bonding different steel sheet materials, the workpiece heating apparatus comprising: a heating housing installed on a base; First and second lower molds installed in contact with each other on both sides of the base in the heating housing; First and second upper molds disposed in correspondence with upper portions of the first and second lower molds in mutual contact with each other in the heating housing; A driving cylinder installed at the center of the outer upper surface of the heating housing and connected to the upper side of the first and second upper molds through an upper surface of the heating housing; A hot stamping material heating apparatus may be provided which includes a heating source provided with a space portion on each of the mutually corresponding surfaces of the first lower mold and the corresponding first upper mold and provided inside each space portion.

In addition, the heating housing may be formed with both an inlet and an outlet for supplying and discharging the hot stamping material on both right and left sides.

In addition, a heat insulating material may be interposed between the first lower mold and the second lower mold.

Further, a heat insulating material may be interposed between the first and second upper molds.

In addition, the second lower die may have a seating surface on which the hot stamping material is seated.

In addition, the driving cylinder may be connected to an adapter in which an operating rod is installed on the upper portion between the first and second upper molds.

The heating source may include a plurality of infrared heat lamps installed on the inner surfaces of the spaces of the first lower mold and the first upper mold.

In the embodiment of the present invention, a workpiece to which a boron steel plate requiring heat processing is bonded to a soft steel plate that does not require heat processing is thermally processed, and only a portion requiring heat processing is thermally processed through an infrared heating lamp The cost can be reduced as compared with the total heat treatment cost.

This makes it possible to secure the local stiffness of the required portion and to ideally derive the deformation behavior at the time of impact.

1 is a conceptual diagram of a general hot stamping process.
2 is a perspective view of a hot stamping material heating apparatus according to an embodiment of the present invention.
3 is a sectional view taken along the line AA in Fig.
4 is an operational state diagram of a hot stamping material heating apparatus 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.

FIG. 2 is a perspective view of a hot stamping material heating apparatus according to the present invention, and FIG. 3 is a sectional view taken along line A-A of FIG.

The hot stamping material 1 is formed by the hetero-bonding of the boron steel sheet 10 and the soft steel sheet 11. The hot stamping material 1 is a hot stamping material in which different steel sheets are bonded to each other.

The above-mentioned heterogeneous bonding is performed by the TWB welding technique. The TWB welding is a tailor-made welding technique in which steel sheets having different thicknesses, strengths, and materials are cut into appropriate sizes and shapes and joined by laser welding.

2 and 3, a hot stamping workpiece heating apparatus 20 according to an embodiment of the present invention includes a heating housing 23, first and second lower molds 31 and 32, first and second upper molds 31 and 32, The hot stamping material 1, which is formed by joining different steel sheets to each other including the driving cylinder 25 and the heating source 30, is locally thermally processed.

The heating housing 23 is installed on the base 21 to form a space defined therein.

The heating housing 23 is provided with a charging port 23a and a charging port 23b for charging and discharging the hot stamping material 1 on both left and right sides, respectively.

The first and second lower molds 31 and 32 are installed inside the heating housing 23. The first and second lower molds 31 and 32 are installed on the left side in FIG. As shown in FIG.

The first and second lower molds 31 and 32 are installed on both sides of the base 21 in mutual contact with each other and a heat insulating material 50 is interposed between the first and second lower molds 31 and 32 The movement of the heat source is blocked.

In addition, a seating surface F may be formed on the upper surface of the second lower molds 31 and 32 so that the hot stamping material 1 is seated thereon.

The first and second upper molds 41 and 42 are disposed corresponding to the upper portions of the first and second lower molds 31 and 32 while being in contact with each other in the heating housing 23.

At this time, a heat insulating material 50 is also interposed between the first upper mold 41 and the second upper mold 42 to block the movement of the heat source.

The driving cylinder 25 is installed at the center of the upper surface of the outer surface of the heating housing 23. The operating rod 27 of the driving cylinder 25 passes through the upper surface of the heating housing 23, And is connected to the upper side of the second upper molds 41 and 42.

At this time, the operating rod 27 of the driving cylinder 25 is connected through the adapter 29 provided on the upper part between the first upper mold 41 and the second upper mold 42.

The heating source 30 may have a space S formed in each of the mutually corresponding surfaces of the first lower mold 31 and the corresponding first upper mold 41, Respectively.

That is, the heating source 30 is composed of a plurality of infrared heating lamps installed on the inner surfaces of the space S of the first lower mold 31 and the first upper mold 41.

Therefore, the operation of the hot stamping material heating apparatus 20 according to the embodiment of the present invention as described above will be described with reference to FIG.

4 is an operational state diagram of a hot stamping material heating apparatus according to an embodiment of the present invention.

That is, in the hot stamping workpiece heating apparatus 20 according to the embodiment of the present invention, as shown in FIG. 3, the first and second upper and lower workpieces 41 and 42 are raised upward by the backward movement of the drive cylinder 25 The hot stamping material 1 is put into the heating housing 23 through the charging port 23a.

At this time, the hot stamping material 1 is seated on the seating surface F of the second lower mold 32. In this state, the driving cylinder 25 is driven forward to move the first and second upper molds 41 and 42, At the same time.

4, the hot stamping material 1 is formed such that the right portion thereof is fixed by the second lower mold 32 and the second upper mold 42, and the left portion, which requires thermal processing, The hot work is locally instantaneously heated by the heating source 30 composed of the plurality of infrared heat lamps arranged in the space S of the upper mold 41 and the first lower mold 31 to perform thermal processing.

That is, the output of the heating source 30 can be controlled by a controller (not shown), and the heating time and the heating condition can be set through the output control.

After the thermal processing is locally performed on the hot stamping material 1, the driving cylinder 25 is driven backward and the first and second upper molds 41 and 42 are lifted, The hot stamping material 1 is taken out through the outlet 23b of the hot stamping material 23b.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

1: Hot stamping material
20: Hot stamping material heating device
23: Heating housing
31, 32: first and second lower molds
41 and 42: first and second upper molds
25: driving cylinder
30: Heating source
S: space portion

Claims (10)

1. A workpiece heating apparatus for locally thermally processing a hot stamping material formed by heterogeneously bonding different steel sheet materials,
A heating housing mounted on the base;
First and second lower molds installed in contact with each other on both sides of the base in the heating housing;
First and second upper molds disposed in correspondence with upper portions of the first and second lower molds in mutual contact with each other in the heating housing;
A driving cylinder installed at the center of the outer upper surface of the heating housing and connected to the upper side of the first and second upper molds through an upper surface of the heating housing;
A heating source which is provided on each of the mutually corresponding surfaces of the first lower mold and the corresponding first upper mold, and is provided inside each of the spaces;
Wherein the hot stamping material heating apparatus comprises: The method according to claim 1,
The heating housing
A hot stamping material heating device in which an inlet and an outlet for feeding and discharging a hot stamping material are formed on both left and right sides, respectively. The method according to claim 1,
Between the first lower mold and the second lower mold
Hot stamping material heating device with insulation. The method according to claim 1,
Between the first and second upper and lower molds
Hot stamping material heating device with insulation. The method according to claim 1 or 3,
The second lower die
And a seating surface on which the hot stamping material is seated is formed on an upper surface thereof. The method according to claim 1,
The drive cylinder
Wherein an operating rod is connected to an adapter installed on top of said first and second upper molds. The method according to claim 1,
The heating source
And a plurality of infrared heat lamps provided on inner surfaces of the spaces of the first lower mold and the first upper mold. 1. A workpiece heating apparatus for locally thermally processing a hot stamping material formed by heterogeneously bonding different steel sheet materials,
A heating housing in which a charging port and a charging port for charging and discharging the hot stamping material provided on the base are formed on both right and left sides, respectively;
First and second lower molds provided on both sides of the base in a state where they are in contact with each other through a heat insulating material in the heating housing;
First and second upper molds disposed in correspondence with upper portions of the first and second lower molds in contact with each other through a heat insulating material in the heating housing;
A driving cylinder installed at the center of the outer upper surface of the heating housing and connected to the upper side of the first and second upper molds through an upper surface of the heating housing;
A heating source comprising a plurality of infrared heating lamps each having a space portion formed on a corresponding surface of the first lower mold and a corresponding first upper mold,
Wherein the hot stamping material heating apparatus comprises: The method according to claim 1 or 3,
The second lower die
And a seating surface on which the hot stamping material is seated is formed on an upper surface thereof. The method according to claim 1,
The drive cylinder
Wherein an operating rod is connected to an adapter installed on top of said first and second upper molds.
KR1020130169448A 2013-12-31 2013-12-31 Heating device of hot stamping panel KR20150080353A (en)

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Application Number Priority Date Filing Date Title
KR1020130169448A KR20150080353A (en) 2013-12-31 2013-12-31 Heating device of hot stamping panel

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Application Number Priority Date Filing Date Title
KR1020130169448A KR20150080353A (en) 2013-12-31 2013-12-31 Heating device of hot stamping panel

Publications (1)

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KR20150080353A true KR20150080353A (en) 2015-07-09

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KR1020130169448A KR20150080353A (en) 2013-12-31 2013-12-31 Heating device of hot stamping panel

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102642390B1 (en) * 2023-05-03 2024-02-28 이용선 Mixed upset forging device and forging processing method using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102642390B1 (en) * 2023-05-03 2024-02-28 이용선 Mixed upset forging device and forging processing method using the same

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