KR20200056156A - 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 of a metal plate capable of performing heating and cooling of a metal plate in one heat treatment apparatus, and to a heat treatment method thereof. The heat treatment apparatus of the metal plate comprises: a lower mold being in contact with a first surface of a heated metal plate to cool the metal plate so as to thermally treat the metal plate; an upper mold installed to ascend and descend in a direction close to or far away from the lower mold by an ascending/descending cylinder installed in the lower mold, and being in contact with an opposite surface of the first surface of the metal plate to cool the metal plate; a support cylinder installed to ascend and descend in the lower mold, and supporting the metal plate between the lower mold and the upper mold; and a movable heater installed to slidably enter between the upper mold and the metal plate, and heating the metal plate. According to the present invention, excellent heat treatment quality of the metal plate can be ensured.

Description

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

The present invention relates to a heat treatment device and a heat treatment method for a metal plate material, and more particularly, to a heat treatment device and a heat treatment method for a metal plate material capable of performing heating and cooling of the metal plate material in one heat treatment device.

In order to form a high-strength metal plate having limited room temperature formability, a heat treatment integrated molding technology (also referred to as hot press, hot stamping, die quenching, press quenching, etc.) with improved formability has recently attracted attention. This, heat treatment integrated molding technology is a process of obtaining a desired material through post-heating treatment such as quenching by cooling after molding while securing the moldability by heating the metal sheet after heating it to the phase transformation region.

In particular, in the integrated molding of heat treatment of an aluminum alloy, the heat treatment technology of the aluminum alloy plate for heating and maintaining at a temperature for employing a main alloy element and rapidly cooling it to form a supersaturated solid solution is important, and such heat treatment improves quality such as productivity and strength. In order to secure at the same time, it is performed in a heating / cooling system inside a press mold or in conjunction with a 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 the maintenance of a uniform temperature within the target temperature range of the metal plate can act as important factors.

In a conventional metal plate heating apparatus for heat treatment of a metal plate, heating using a chamber for controlling an ambient temperature and heating through contact of a heated jig are mainly performed. However, the heating method of the metal plate utilizing the chamber is suitable for heat-treating the metal plate at a constant temperature, but is not suitable for rapidly heating the metal plate within tens of seconds, and the heating method of the metal plate contacting the heated fixture is advantageous for rapid heating. However, maintaining a uniform temperature had a difficult problem.

In addition, in the process of cooling the metal plate to create a supersaturated solid solution at room temperature after the alloy element is dissolved in the metal plate, a sufficient cooling rate must be secured to prevent precipitation of the employed alloy element, and the uneven cooling rate is a metal plate. There is a problem that causes the thermal deformation of the metal plate, there is a problem that some solid solution is precipitated by the natural cooling of the metal plate because the transfer time is longer when transferred to a separate cooling device after heating of the metal plate.

The present invention is to solve a number of problems, including the problems as described above, by performing the heating and cooling of the metal plate in one heat treatment device, it is possible to solve the cooling problem caused by the transfer of the metal plate between the heating and cooling devices It is an object 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, a heat treatment device for a metal plate is provided. The heat treatment apparatus for the metal plate material may include a lower metal mold that cools the metal plate material by contacting a first surface of the heated metal plate material so as to heat the metal plate material; It is installed so that the elevating cylinder installed on the lower mold can move up and down in a direction closer to or away from the lower mold, and is in contact with an opposite surface of the first side of the metal plate to cool the metal plate. ; A support cylinder that is installed to move up and down on the lower mold, and supports the metal plate between the lower mold and the upper mold by at least three-point support; And a movable heater installed to slide in between the upper mold and the metal plate to heat the metal plate.

According to an embodiment of the present invention, when the metal plate is heated by the movable heater, to prevent the heat loss of the metal plate from occurring through the support cylinder, to the metal plate support surface of the support cylinder It may further include; a heat insulating member to be installed.

According to an embodiment of the present invention, the lower mold and the upper mold may be formed with a cooling channel or a thermoelectric element through which cooling water flows to cool the metal plate in a die cooling method.

According to an embodiment of the present invention, the movable heater may be an optical heating body 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 body using any one of cartridge heating, thermoelectric element heating, electrification heating, and surface heating so that the metal plate material can be heated in contact.

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

According to an embodiment of the present invention, when the metal plate is heated, the control unit may be supported by the support cylinder so that the metal plate is supported by the support cylinder to be spaced apart from the lower mold and the upper mold by a predetermined distance. By applying a control signal, the support cylinder can 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 so as to be able to enter the sliding between the movable heater and the upper mold to prevent the heat of the movable heater from being transferred to the upper mold. Shielding member; may further include.

According to another embodiment of the present invention, a method of heat treatment of a metal plate is provided. The method of heat treatment of the metal plate material may include: bringing the metal plate material between the lower metal mold and the upper metal mold to be seated on the support cylinder; A metal plate heating step of heating the metal plate by bringing the movable heater between the upper mold and the metal plate; After heating the metal plate, the metal plate cooling step of taking out the movable heater and lowering the upper die and the support cylinder to cool the metal plate; And a step of taking out the cooled metal plate to take the metal plate out.

According to another embodiment of the present invention, in the step of bringing in the metal plate, the support cylinder is placed at the first height so that the metal plate is 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 first height so that the metal plate can contact the lower mold and the upper mold, and the upper mold is removed from the first mold. It can be lowered by 2 heights.

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 of the movable heater from being transferred to the upper mold. have.

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

1 to 4 are cross-sectional views schematically showing an operation sequence of a heat treatment apparatus for a metal plate according to an embodiment of the present invention.
5 is a cross-sectional view schematically showing a heat treatment apparatus for 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 preferred 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 fully describe the present invention to those skilled in the art, and the following embodiments 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 fully convey the spirit of the present invention to those skilled in the art. In addition, the thickness or size of each layer in the drawings is exaggerated for convenience and clarity of explanation.

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 the manufacturing technique and / or tolerance, deformations of the illustrated shape can be expected. Therefore, embodiments of the inventive concept should not be interpreted as being limited to a specific shape of the region shown in this specification, but should include, for example, a change in shape resulting from manufacturing.

1 to 4 are cross-sectional views schematically showing an operation sequence of the 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 ).

First, as shown in Figures 1 to 4, the metal plate heat treatment apparatus 100 according to an embodiment of the present invention, the lower mold 10, the upper mold 20, and the support cylinder 30 And, 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 contacts the first surface, which is the lower surface of the heated metal plate P, to cool the metal plate P so as to heat-treat the metal plate P. Can be. In addition, the upper die 20 is installed so as to move up and down in the direction toward or away from the lower die 10 by the elevating cylinder 70 installed on the lower die 10, and the metal plate (P) The metal plate P may be cooled by making contact with the opposite surface of the first surface, which is the upper 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 therein to cool the metal plate P in a die cooling method. A cooling channel (C) or a thermoelectric element showing an endothermic reaction due to the Peltier effect is formed, so that the lower metal mold 10 and the upper metal 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 expand and contract according to the control signal of the control unit, the upper die 20 and the lower die 10 It can be moved up and down in the direction of getting closer or away.

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

In addition, as shown in FIG. 2, the movable heater 40 is installed to slide in between the upper die 20 and the metal plate P, and can heat the metal plate P. More specifically, the movable heater 40 may be an optical heating body 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 an optical 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, so that the metal plate P can be heated in a contact manner, cartridge heating, thermoelectric heating, energizing heating, plane It may be a mold heating body using any one of heating.

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

Accordingly, a heat insulating member 50 is formed between the support cylinder 30 supporting the metal plate P and the metal plate P, thereby thermally separating the metal plate P and the support cylinder 30, The temperature of the metal plate P during heating can be prevented from being conducted through the support cylinder 30 to increase the heating efficiency of the metal plate P and to induce uniform heating.

Thus, as shown in Figures 1 to 4, the heat treatment process of the heat treatment apparatus 100 of a metal plate according to an embodiment of the present invention, first, as shown in Figure 1, the control signal of the control unit By the support cylinder 30 to support the metal plate (P) and the elevating cylinder (70) for elevating and elevating the upper die 20, the metal plate (P) using a robot arm (A) or the like It can 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 predetermined by the lower mold 10 and the upper mold 20 by the raised support cylinder 30. It can be supported in a distanced state.

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

Subsequently, the movable heater 40 may be brought into sliding movement between the upper die 20 and the metal plate P by the control signal of the control unit. After the movable heater 40 is stopped at a position corresponding to the position of the metal plate P, the metal heater P may be heated.

Subsequently, as shown in FIG. 3, after the heating of the metal plate P is completed, the movable heater 40 is slidably moved out by the control signal of 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 contact the lower mold 10 and the upper surface may contact the upper mold 20.

At this time, the control unit, the lower surface of the metal plate (P) and the lower mold 10 so that the contact between the upper surface of the metal plate material (P) and the upper mold 20 can occur at the same time, the support cylinder 30 and win The descending speed of the descending cylinder 70 can be appropriately controlled. As such, in the state where the metal plate material P and the lower metal mold 10 and the upper metal mold 20 are in contact, the metal plate material P is cooled by the lower metal mold 10 and the upper metal mold 20 cooled to the cooling temperature. Cooling may 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 spaced apart from the lower metal mold 10 and the upper metal mold 20. After moving, the metal plate P can be taken out using the robot arm A.

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

Therefore, during the heat treatment of the metal plate P, the natural cooling problem of the metal plate P according to the transfer of the metal plate P between the heating and cooling devices can be solved, and the structure of the heat treatment device 100 of the metal plate P can be solved. Simultaneously, at the same time, by implementing uniform heating and uniform cooling of the metal plate P, it can have an effect of securing excellent heat treatment quality of the metal plate P.

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

As shown in FIG. 5, when the movable heater 40 heats the metal plate P, the movable heater 40 can prevent the heat of the movable heater 40 from being transferred to the upper die 20. Shielding member 60 may be installed to allow sliding entry between and the upper mold 20.

More specifically, the shielding member 60 may be formed of a kind of heat insulating material to prevent the heat of the mobile heater 40 from being transferred to the upper mold 20, and is 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 shielding member 60 to induce heat emitted to the upper portion of the movable heater 40 to be reflected in the direction of the metal plate P. In addition, although not shown, the shielding member 60 slides between the metal plate P and the lower mold 10 to prevent the heat of the metal plate P during heating from being transferred to the lower mold 10. It might be.

Therefore, when the movable heater 40 heats the metal plate P, the heat emitted from the movable heater 40 or the metal plate P is prevented from being transferred to the lower metal mold 10 or the upper metal 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 can have an effect of preventing a reduction in cooling efficiency. In addition, by inducing the heat emitted from the movable heater 40 by the shielding member 60 to be concentrated in the metal plate P, the heating efficiency of the metal plate P can also be effectively increased.

Therefore, the heat treatment apparatus 200 for a metal plate according to another embodiment of the present invention, using a movable heater 40 movable between the cooling molds 10 and 20 of the metal plate P, the metal plate P ) Is performed by heating and cooling in one heat treatment apparatus, and the heating efficiency and cooling efficiency of the metal plate P can be further increased by using the shielding member 60.

Therefore, during the heat treatment of the metal plate P, it is possible to solve the natural cooling problem of the metal plate P according to the transfer of the metal plate P between the heating and cooling devices, and the structure of the heat treatment device 100 of the metal plate P Simultaneously, at the same time, by implementing uniform heating and uniform cooling of the metal plate P, it can have an effect of securing excellent heat treatment quality of the metal plate 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 method of heat treatment of a 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 Metal plate material bringing in step (S10), and a metal plate heating step (S20) in which the movable heater 40 is carried between the upper mold 20 and the metal plate P to heat the metal plate P, and metal Metal plate cooling step (S30) and cooled metal plate (C) cooling the metal plate (P) by heating the plate (P), then moving the movable heater (40) and lowering the upper die (20) and the support cylinder (30) It may include a step (S40) for taking out the metal plate P) to the outside.

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

In addition, in the metal plate heating step (S20), heat generated in the movable heater 40 and heat generated in the metal plate P to be heated are prevented from being transferred to the lower metal mold 10 and the upper metal mold 20. To be able, the shielding member 60 may be carried between the movable heater 40 and the upper die 20.

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

Therefore, during the heat treatment of the metal plate P, it is possible to solve the natural cooling problem of the metal plate P according to the transfer of the metal plate P between the heating and cooling devices, and the structure of the heat treatment device 100 of the metal plate P Simultaneously, at the same time, by implementing uniform heating and uniform cooling of the metal plate P, it can have an effect of securing excellent heat treatment quality of the metal plate P.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand 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: Ha-myung
20: Prize
30: support cylinder
40: removable heater
50: insulating member
60: shielding member
70: lifting cylinder
P: Metal plate
C: cooling channel
100, 200: metal plate heat treatment device

Claims (12)

A metal mold that cools the metal plate by contacting the heated first surface of the metal plate to heat-treat the metal plate;
It is installed so as to move up and down in the direction closer to or away from the lower mold by the elevating cylinder installed in the lower mold, and is in contact with the opposite side of the first side of the metal plate to cool the metal mold. ;
A support cylinder installed to move up and down on the lower mold, and supporting the metal plate between the lower mold and the upper mold; And
A movable heater installed to allow sliding entry between the upper mold and the metal plate to heat the metal plate;
The heat treatment apparatus of a metal plate containing. According to claim 1,
When the metal plate is heated by the movable heater, an insulating member installed on the metal plate support surface of the support cylinder to prevent heat loss of the metal plate through the support cylinder;
Further comprising, a heat treatment device for a metal plate. According to claim 1,
The lower mold and the upper mold,
A cooling channel or a thermoelectric element through which cooling water flows is formed to cool the metal plate by a die cooling method, wherein the heat treatment device of the metal plate is formed. According to claim 1,
The movable heater,
An optical heating chain using infrared heating (NIR heating) to heat the metal plate in a non-contact manner, and a heat treatment device for the metal plate. According to claim 1,
The movable heater,
A mold heating chain using any one of cartridge heating, thermoelectric element heating, electrification heating, and surface heating so that the metal plate material can be heated in a contact manner, and a heat treatment device for the metal plate material. According to claim 1,
A control unit for controlling the up and down driving of the upper die and the support cylinder and the sliding driving of the movable heater;
Further comprising, a heat treatment device for a metal plate. The method of claim 6,
The control unit,
When the metal plate is heated, the metal plate is raised to a first height by applying a control signal to the support cylinder so that the metal plate can be supported at a predetermined distance from the lower mold and the upper mold by the support cylinder. A metal plate heat treatment apparatus for raising the support cylinder to a lower second height. According to claim 1,
A shielding member installed to allow sliding entry between the movable heater and the upper mold to prevent heat of the movable heater from being transferred to the upper mold when heating the metal plate;
Further comprising, a heat treatment device for a metal plate. A method for heat treatment of a metal plate using a heat treatment device for a metal plate according to any one of claims 1 to 8,
A metal plate material loading step of bringing the metal plate material between the lower metal mold and the upper metal mold and seating the support cylinder;
A metal plate heating step of heating the metal plate by bringing the movable heater between the upper mold and the metal plate;
After heating the metal plate, the metal plate cooling step of taking out the movable heater and cooling the metal plate by lowering the upper die and the support cylinder; And
A metal plate carrying out step of taking the cooled metal plate out to the outside;
A method of heat treatment of a metal plate comprising a. The method of claim 9,
In the step of bringing in the metal plate,
A metal that raises the support cylinder to the second height lower than the upper mold raised to the first height so that the metal plate material can be supported at a predetermined distance from the lower mold and the upper mold by the support cylinder Method of heat treatment of sheet materials. The method of claim 10,
In the metal plate cooling step,
A method of heat-treating a metal plate, so that the support cylinder is lowered by the first height and the upper mold is lowered by the second height so that the metal plate can contact the lower mold and the upper mold. The method of claim 9,
In the metal plate heating step,
A method of heat-treating a metal plate, in which the shielding member is carried between the movable heater and the upper die to prevent heat of the movable heater from being transferred to the upper die.

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