KR102155045B1 - Heat treatment apparatus for metal plate and heat treatment methods using the same - Google Patents

Abstract

The present invention relates to a heat treatment apparatus and a heat treatment method for a metal plate that can heat and cool the metal plate in one heat treatment apparatus, and contact with the first surface of the heated metal plate so that the metal plate may be heat treated. And a lower mold that cools the metal plate, and an elevating cylinder installed on the lower mold so as to move up and down in a direction closer to or away from the lower mold, and a surface opposite to the first surface of the metal plate An upper mold for cooling the metal plate material by contacting with, and a support cylinder installed so as to move up and down on the lower mold to support the metal plate material between the lower mold and the upper mold, and between the upper mold and the metal plate material It is installed to be able to enter the sliding entry, it may include a movable heater for heating the metal plate.

Description

Heat treatment apparatus for metal plate and heat treatment methods using the same}

The present invention relates to a heat treatment apparatus and a heat treatment method for a metal plate, and more particularly, to a heat treatment apparatus and a heat treatment method for a metal plate that can heat and cool the metal plate in one heat treatment apparatus.

In order to form a high-strength metal plate with limited room temperature formability, a heat treatment integrated molding technology (also referred to as hot press, hot stamp, die quenching, press quenching, etc.) with improved formability has recently attracted attention. In this integrated heat treatment molding technology, a metal plate is heated to a phase transformation region and then molded to ensure formability, and at the same time, a desired material is obtained through post-heat treatment such as quenching by cooling after molding.

In particular, in the heat treatment integrated molding of aluminum alloys, the heat treatment technology of the aluminum alloy plate to make a supersaturated solid solution by heating and maintaining the temperature for solid solution and rapid cooling is important, and such heat treatment improves quality such as productivity and strength. At the same time, it is being carried out inside the press mold or in a heating/cooling system linked to the molding system. At this time, during the heat treatment of the metal plate, for uniform quality of the heat-treated metal plate, the treatment time of the heat treatment temperature and maintenance of the uniform temperature within the target temperature range of the metal plate may serve as important factors.

In the conventional heating apparatus for a metal plate for heat treatment of a metal plate, heating using a chamber for controlling an atmosphere temperature and heating by contacting a heated jig are mainly performed. However, the heating method of a metal plate using a chamber is suitable for heat treatment of a metal plate at a constant temperature, but is not suitable for rapid heating of a metal plate within tens of seconds, and the heating method of a metal plate contacting the heated jig is advantageous for rapid heating. However, it was difficult to maintain a uniform temperature.

In addition, after solidification of the alloying elements of the metal plate, even in the cooling process of the metal plate to make a supersaturated solid solution state at room temperature, a sufficient cooling rate must be secured to prevent precipitation of the solid solution alloying element. There is a problem that causes thermal deformation of the metal plate, but when the metal plate is heated and transferred to a separate cooling device, the transfer time is lengthened, and there is a problem that some solid solutions are precipitated by natural cooling of the metal plate.

The present invention is to solve a number of problems including the above problems, and by performing heating and cooling of a metal plate in one heat treatment device, it is possible to solve the cooling problem caused by transfer of the metal plate between the heating and cooling devices. An object of the present invention is to provide a heat treatment apparatus and a heat treatment method for a metal plate. However, these problems are exemplary, and the scope of the present invention is not limited thereby.

According to an embodiment of the present invention, an apparatus for heat treatment of a metal plate is provided. The apparatus for heat treatment of the metal plate may include: a lower mold for cooling the metal plate by contacting the first surface of the heated metal plate to heat the metal plate; The upper mold is installed so as to move up and down in a direction closer to or away from the lower mold by an elevating cylinder installed on the lower mold, and cooling the metal plate by contacting the opposite surface of the first surface of the metal plate ; A support cylinder installed so as to move up and down on the lower mold and supporting the metal plate between the lower mold and the upper mold by at least three-point support; And a movable heater installed to slide between the upper mold and the metal plate to heat the metal plate.

According to an embodiment of the present invention, when heating the metal plate by the mobile heater, to prevent heat loss of the metal plate through the support cylinder, the metal plate support surface of the support cylinder Insulation member to be installed; may further include.

According to an embodiment of the present invention, the lower mold and the upper mold may have cooling channels or thermoelectric elements through which cooling water flows to cool the metal plate through a die cooling method.

According to an embodiment of the present invention, the mobile heater may be an optical heating element using infrared heating (NIR heating) so that the metal plate can be heated in a non-contact manner.

According to an embodiment of the present invention, the movable heater may be a mold heating element using any one of cartridge heating, thermoelectric element heating, energization heating, and planar heating to heat the metal plate in a contact manner.

According to an embodiment of the present invention, a control unit for controlling the lifting drive of the upper mold and the support cylinder and sliding drive of the movable heater; may further include.

According to an embodiment of the present invention, the control unit, when heating the metal plate, so that the metal plate can be supported by the support cylinder to be spaced apart from the lower mold and the upper mold by a predetermined distance, to the support cylinder. By applying a control signal, the support cylinder may be raised to a second height lower than the upper mold raised to the first height.

According to an embodiment of the present invention, when the metal plate is heated, it is installed to slide between the movable heater and the upper mold so as to prevent heat from being transferred to the upper mold. Shielding member; may further include.

According to another embodiment of the present invention, a method for heat treatment of a metal plate is provided. The heat treatment method of the metal plate may include carrying the metal plate between the lower mold and the upper mold and seating the metal plate on the support cylinder; A metal plate heating step of heating the metal plate by carrying the mobile heater between the upper mold and the metal plate; After heating the metal plate, cooling the metal plate by taking out the mobile heater and lowering the upper mold and the support cylinder; And carrying out the cooled metal plate to the outside.

According to another embodiment of the present invention, in the step of bringing in the metal plate, the support cylinder is raised to the first height so that the metal plate may be supported by the support cylinder to be spaced apart from the lower mold and the upper mold by a predetermined distance. It can be raised to the second height lower than the raised upper mold.

According to another embodiment of the present invention, in the cooling of the metal plate, the support cylinder is lowered by the second height so that the metal plate may contact the lower mold and the upper mold, and the upper mold You can descend by 1 height.

According to another embodiment of the present invention, in the step of heating the metal plate, the shielding member may be carried between the movable heater and the upper mold so as to prevent heat from the movable heater from being transferred to the upper mold. have.

According to an embodiment of the present invention made as described above, since heating and cooling of the metal plate are performed in one heat treatment apparatus using a movable heater that is movable between the cooling molds of the metal plate, the metal between the heating and cooling apparatuses It is possible to solve the problem of natural cooling of the metal plate due to the transfer of the plate material. In addition, it is possible to implement a heat treatment apparatus and a heat treatment method for a metal plate that can secure excellent heat treatment quality of the metal plate by implementing the structure of the heat treatment device for the metal plate simply while implementing uniform heating and uniform cooling of the metal plate. have. Of course, the scope of the present invention is not limited by these effects.

1 to 4 are cross-sectional views schematically illustrating an operation sequence of a heat treatment apparatus for a metal plate according to an exemplary embodiment of the present invention.
5 is a cross-sectional view schematically showing an apparatus for heat treatment of a metal plate according to another embodiment of the present invention.
6 is a flow chart showing a heat treatment method of a metal plate according to another embodiment of the present invention.

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

The embodiments of the present invention are provided to more completely describe the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and the scope of the present invention is as follows. It is not limited to the examples. Rather, these embodiments are provided to make the present disclosure more faithful and complete, and to completely convey the spirit of the present invention to those skilled in the art. In addition, in the drawings, the thickness or size of each layer is exaggerated for convenience and clarity of description.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing ideal embodiments of the present invention. In the drawings, for example, depending on manufacturing techniques and/or tolerances, variations of the illustrated shape can be expected. Accordingly, the embodiments of the inventive concept should not be construed as being limited to the specific shape of the region shown in the present specification, but should include, for example, a change in shape caused by manufacturing.

1 to 4 are cross-sectional views schematically showing an operation sequence of a heat treatment apparatus 100 for a metal plate according to an embodiment of the present invention, and FIG. 5 is a heat treatment apparatus 200 for a metal plate according to another embodiment of the present invention. ) Is a schematic cross-sectional view.

First, as shown in Figures 1 to 4, the heat treatment apparatus 100 for a metal plate according to an embodiment of the present invention, the lower mold 10, the upper mold 20, and the support cylinder 30 Wow, it may include a movable heater 40, a heat insulating member 50 and a control unit (not shown).

As shown in FIG. 1, the lower mold 10 is in contact with the first surface, which is the lower surface of the heated metal plate P, to cool the metal plate P so that the metal plate P can be heat treated. I can. In addition, the upper mold 20 is installed so as to be able to elevate in a direction closer to or away from the lower mold 10 by the elevating cylinder 70 installed on the lower mold 10, and The metal plate material P may be cooled by contacting the upper surface of the opposite surface of the first surface.

More specifically, the lower mold 10 and the upper mold 20 are cooling molds, and may be formed of copper having excellent thermal conductivity, and cooling water flows inside so that the metal plate P can be cooled by a die cooling method. A cooling channel C or a thermoelectric element exhibiting an endothermic reaction due to the Peltier effect is formed, so that the lower mold 10 and the upper mold 20 can be cooled to the cooling temperature of the metal plate P.

In addition, the elevating cylinder 70, any one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder may be used, and is extended and contracted according to a control signal from the control unit, so that the upper mold 20 and the lower mold 10 It can be raised or lowered in the direction of getting closer or farther away.

As shown in Figure 1, the support cylinder 30 is installed so as to move up and down on the lower mold 10, the metal plate material P by at least three points support the lower mold 10 and the upper mold 20 I can support it. More specifically, as the support cylinder 30, any one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder may be used, and the metal plate material P is extended and contracted according to a control signal from the control unit to form the lower mold 10 and It can be supported to be spaced apart from the upper mold 20 a certain distance. At this time, it may be preferable that the support cylinder 30 supports the metal plate material P by dead-point support so as to stably support the metal plate material P.

In addition, as shown in FIG. 2, the movable heater 40 is installed so as to slide between the upper mold 20 and the metal plate P, so as to heat the metal plate P. More specifically, the mobile heater 40 may be an optical heater using infrared heating (NIR heating) so that the metal plate P can be heated in a non-contact manner. In addition, the movable heater 40 may be a light heater using various lamp heating methods such as a halogen lamp or an LED lamp. However, the movable heater 40 according to an embodiment of the present invention is not necessarily limited to FIG. 2, and so that the metal plate P can be heated in a contact manner, cartridge heating, thermoelectric element heating, energization heating, plane It may be a mold heating body using any one of heating.

In addition, when the mobile heater 40 heats the metal plate P, heat conduction occurs to the support cylinder 30 installed in the lower mold 10 and maintained at a cooling temperature, resulting in heat loss of the metal plate P. In order to prevent this from occurring, a heat insulating member 50 may be installed on the metal plate support surface of the support cylinder 30.

Accordingly, the heat insulating member 50 is formed between the metal plate material P and the support cylinder 30 supporting the metal plate material P, thereby thermally separating the metal plate material P and the support cylinder 30, By preventing the temperature of the metal plate P during heating from being conducted through the support cylinder 30, the heating efficiency of the metal plate P may be increased and uniform heating may be induced.

Accordingly, as shown in FIGS. 1 to 4, the heat treatment process of the heat treatment apparatus 100 for a metal plate according to an embodiment of the present invention is, first, as shown in FIG. 1, in response to a control signal of the controller. As a result, the support cylinder 30 for supporting the metal plate P and the lifting cylinder 70 for raising and lowering the upper mold 20 are raised, and the metal plate P is removed using a robot arm (A) or the like. It may be carried between the lower mold 10 and the upper mold 20. The metal plate material P carried between the lower mold 10 and the upper mold 20 by the robot arm (A) is determined with the lower mold 10 and the upper mold 20 by the raised support cylinder 30. It can be supported at a distance apart.

More specifically, as shown in Figure 2, the control unit, so that the metal plate material (P) is supported by the support cylinder 30 to be spaced apart from the lower mold 10 and the upper mold 20 a predetermined distance, By applying a control signal to the support cylinder 30, the support cylinder 30 can be raised to a second height H2 lower than the upper mold 20 raised to the first height H1 by the elevating cylinder 70. I can.

Subsequently, the movable heater 40 may slide between the upper mold 20 and the metal plate P according to the control signal of the controller to be carried. The carried-in mobile heater 40 may be stopped at a position corresponding to the position of the metal plate P, and then heat the metal plate P.

Subsequently, as shown in FIG. 3, after heating of the metal plate P is completed, the movable heater 40 is slid and carried out by a control signal from the control unit, and the support cylinder 30 and the elevating cylinder 70 ) By lowering, as shown in FIG. 4, the lower surface of the metal plate P may be in contact with the lower mold 10 and the upper surface may be in contact with the upper mold 20.

At this time, the control unit, so that the contact between the lower surface of the metal plate (P) and the lower mold (10) and the upper surface of the metal plate (P) and the upper mold (20) can occur at the same time, the support cylinder (30) and The descending speed of the descending cylinder 70 can be appropriately controlled. In such a state in which the metal plate material P and the lower mold 10 and the upper mold 20 are in contact, the metal plate material P is formed by the lower mold 10 and the upper mold 20 cooled to a cooling temperature. Cooling can proceed.

After the cooling of the metal plate (P) is completed, the support cylinder (30) and the elevating cylinder (70) are raised again, so that the metal plate (P) is moved to a position spaced apart from the lower mold (10) and the upper mold (20). After moving, the metal plate material P can be taken out using the robot arm A.

Accordingly, the apparatus 100 for heat treatment of a metal plate according to an embodiment of the present invention uses the movable heater 40 that is movable between the cooling molds 10 and 20 of the metal plate P, and the metal plate P ) Heating and cooling can be performed in one heat treatment unit.

Therefore, during the heat treatment of the metal plate P, it is possible to solve the problem of natural cooling of the metal plate P due to the transfer of the metal plate P between the heating and cooling devices, and the structure of the heat treatment apparatus 100 for the metal plate At the same time simple implementation, by implementing uniform heating and uniform cooling of the metal plate material P, it is possible to have an effect of securing excellent heat treatment quality of the metal plate material (P).

5 is a cross-sectional view schematically showing an apparatus 200 for heat treatment of a metal plate according to another embodiment of the present invention.

As shown in FIG. 5, when the mobile heater 40 heats the metal plate P, the mobile heater 40 can prevent heat from being transferred to the upper mold 20. A shielding member 60 may be installed so as to slide between the and upper mold 20.

More specifically, the shielding member 60 may be formed of a type of insulation material to prevent heat from the mobile heater 40 from being transferred to the upper mold 20, and larger than the area of the mobile heater 40 It can be formed in an area. In addition, a reflective surface is formed on the lower surface of the shield member 60 so that heat emitted to the upper portion of the movable heater 40 may be reflected in the direction of the metal plate material P. In addition, although not shown, the shielding member 60 also slides between the metal plate P and the lower mold 10 to prevent heat from the metal plate P during heating from being transferred to the lower mold 10. May be.

Therefore, when the mobile heater 40 heats the metal plate P, the heat emitted from the mobile heater 40 or the metal plate P is prevented from being transferred to the lower mold 10 or the upper mold 20 , By preventing the temperature of the lower mold 10 and the upper mold 20, which are cooling molds, from rising above the cooling temperature of the metal plate P, it may have an effect of preventing a decrease in cooling efficiency accordingly. In addition, by inducing the heat emitted from the mobile heater 40 by the shield member 60 to be concentrated to the metal plate P, the heating efficiency of the metal plate P can also be effectively increased.

Accordingly, the heat treatment apparatus 200 for a metal plate according to another embodiment of the present invention uses the movable heater 40 that is movable between the cooling molds 10 and 20 of the metal plate P, and the metal plate P ) Heating and cooling are performed in one heat treatment apparatus, and the heating efficiency and cooling efficiency of the metal plate P may be further increased by using the shield member 60.

Therefore, during the heat treatment of the metal plate P, it is possible to solve the problem of natural cooling of the metal plate P due to the transfer of the metal plate P between the heating and cooling devices, and the structure of the heat treatment apparatus 100 for the metal plate At the same time simple implementation, by implementing uniform heating and uniform cooling of the metal plate material P, it is possible to have an effect of securing excellent heat treatment quality of the metal plate material (P).

6 is a flow chart showing a heat treatment method of a metal plate according to another embodiment of the present invention.

As shown in Figure 6, the heat treatment method of the metal plate according to another embodiment of the present invention, the metal plate (P) is carried between the lower mold 10 and the upper mold 20 to the support cylinder 30 The metal plate heating step (S20) for heating the metal plate P by bringing in the metal plate material carrying step (S10) to be seated and the movable heater 40 between the upper mold 20 and the metal plate material (P), and metal After the plate material (P) is heated, the mobile heater 40 is taken out, and the upper mold 20 and the support cylinder 30 are lowered to cool the metal plate material P (S30) and the cooled metal plate material ( It may include a metal plate carrying out step (S40) of carrying out P) to the outside.

More specifically, in the metal plate material carrying step (S10), the metal plate material (P) can be supported by a predetermined distance apart from the lower mold 10 and the upper mold 20 by the support cylinder 30, the support cylinder ( 30) may be raised to a second height H2 lower than the upper mold 20 raised to the first height H1. In addition, in the metal plate cooling step (S30), the support cylinder 30 is lowered by a second height (H2) so that the metal plate material P can be brought into contact with the lower mold 10 and the upper mold 20 The mold 20 can be lowered by the first height H1.

In addition, in the metal plate heating step (S20), the heat generated from the mobile heater 40 and the heat generated from the heated metal plate (P) is prevented from being transferred to the lower mold 10 and the upper mold 20 To be able to, it is possible to carry the shield member 60 between the movable heater 40 and the upper mold 20.

Therefore, the heat treatment method of a metal plate according to another embodiment of the present invention, by using the movable heater 40 that is movable between the cooling molds 10 and 20 of the metal plate P, Heating and cooling can be carried out in one heat treatment unit.

Therefore, during the heat treatment of the metal plate P, it is possible to solve the problem of natural cooling of the metal plate P due to the transfer of the metal plate P between the heating and cooling devices, and the structure of the heat treatment apparatus 100 for the metal plate At the same time simple implementation, by implementing uniform heating and uniform cooling of the metal plate material P, it is possible to have an effect of securing excellent heat treatment quality of the metal plate material (P).

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those of ordinary skill in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: lower mold
20: prize mold
30: support cylinder
40: removable heater
50: insulation member
60: shielding member
70: lifting cylinder
P: metal plate
C: cooling channel
100, 200: heat treatment device for metal plate

Claims (12)

A lower mold for cooling the metal plate by contacting the heated first surface of the metal plate to heat-treat the metal plate;
The upper mold is installed so as to move up and down in a direction closer to or away from the lower mold by an elevating cylinder installed on the lower mold, and cooling the metal plate by contacting the opposite surface of the first surface of the metal plate ;
A support cylinder installed so as to move up and down on the lower mold, and supporting the metal plate between the lower mold and the upper mold;
A movable heater installed so as to slide between the upper mold and the metal plate to heat the metal plate; And
A heat insulating member installed on the metal plate support surface of the support cylinder to prevent heat loss of the metal plate material from occurring through the support cylinder when the metal plate material is heated by the mobile heater;
Containing, a heat treatment apparatus for a metal plate. delete The method of claim 1,
The lower mold and the upper mold,
A heat treatment apparatus for a metal plate, in which a cooling channel or a thermoelectric element is formed through which cooling water flows to cool the metal plate by a die cooling method. The method of claim 1,
The mobile heater,
An optical heating device using infrared heating (NIR heating) so as to heat the metal sheet in a non-contact manner. The method of claim 1,
The mobile heater,
A heat treatment apparatus for a metal plate, which is a mold heating body using any one of cartridge heating, thermoelectric element heating, energization heating, and planar heating so that the metal plate can be heated in a contact manner. The method of claim 1,
A control unit for controlling an elevation driving of the upper mold and the support cylinder and sliding driving of the movable heater;
Further comprising a heat treatment apparatus for a metal plate. The method of claim 6,
The control unit,
When the metal plate is heated, the upper mold is raised to a first height by applying a control signal to the support cylinder so that the metal plate can be supported by the support cylinder to be spaced apart from the lower mold and the upper mold by a predetermined distance. A heat treatment apparatus for a metal plate, which raises the support cylinder to a lower second height. The method of claim 1,
A shielding member installed to slide between the movable heater and the upper mold so as to prevent heat from the movable heater from being transferred to the upper mold when the metal plate is heated;
Further comprising a heat treatment apparatus for a metal plate. As a heat treatment method of a metal plate using the heat treatment apparatus for a metal plate according to any one of claims 1, 3, 4, 5, 6, 7 and 8,
A metal plate carrying step of carrying the metal plate between the lower mold and the upper mold and seated in the support cylinder;
A metal plate heating step of heating the metal plate by carrying the mobile heater between the upper mold and the metal plate;
After heating the metal plate, cooling the metal plate by taking out the mobile heater and lowering the upper mold and the support cylinder; And
A metal plate carrying step of carrying out the cooled metal plate material to the outside;
Containing, the heat treatment method of the metal plate. The method of claim 9,
In the step of bringing in the metal plate,
The metal for raising the support cylinder to the second height lower than the upper mold raised to the first height so that the metal plate may be supported by the support cylinder to be spaced apart from the lower mold and the upper mold by a predetermined distance. Heat treatment method of plate material. The method of claim 10,
In the metal plate cooling step,
The method for heat treatment of a metal plate, in which the support cylinder is lowered by the second height and the upper mold is lowered by the first height so that the metal plate can be brought into contact with the lower mold and the upper mold. The method of claim 9,
In the metal plate heating step,
In order to prevent heat from the mobile heater from being transferred to the upper mold, the shielding member is carried between the mobile heater and the upper mold.

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