WO2014109241A1 - ホットスタンプ加工用加熱装置 - Google Patents
ホットスタンプ加工用加熱装置 Download PDFInfo
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- WO2014109241A1 WO2014109241A1 PCT/JP2013/084861 JP2013084861W WO2014109241A1 WO 2014109241 A1 WO2014109241 A1 WO 2014109241A1 JP 2013084861 W JP2013084861 W JP 2013084861W WO 2014109241 A1 WO2014109241 A1 WO 2014109241A1
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- heating
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- heating tank
- amount
- tank
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
-
- 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
- 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
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/673—Quenching devices for die quenching
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
Definitions
- the present invention relates to a heating device for hot stamping.
- a hot stamping process (hot press process) is known in which a metal material is heated to its quenching temperature and the heated metal material is processed.
- Patent Document 1 describes a heating device for hot stamping for heating a metal material before processing.
- a heating apparatus for hot stamping is required to heat a metal material to a high temperature state in a short time.
- One aspect of the present invention is a heating apparatus for hot stamping for heating while transporting a plated metal material, the first heating tank provided in the transport path of the metal material, A second heating tank provided on the downstream side of the first heating tank in the conveyance path, and the amount of heating by the second heating tank is such that the temperature of the metal material is Ac3 point or higher and The heating amount by the first heating tank is set to be larger than the heating amount by the second heating tank. According to such a configuration, the metal material can be heated to a high temperature state in a short time.
- the first heating tank may be designed so that the residence time of the metal material is longer than that of the second heating tank. According to such a configuration, the time required for heating the metal material can be shortened as compared with the configuration in which the second heating bath has a longer residence time of the metal material than the first heating bath.
- the first heating tank and the second heating tank may be formed in a continuous space, and an infrared heater may be used as a heat source.
- the metal material is heated mainly by radiation (radiation) heating. Therefore, in comparison with a configuration in which a gas burner or the like is used as a heat source (a configuration in which the metal material is heated mainly by convection heating), the temperature distribution in the portion where the first heating tank and the second heating tank are continuous Can be clear.
- variations in the temperature of the metal material can be suppressed, for example, the residence time of the metal material in the first heating tank can be designed with higher accuracy, and the entire heating tank can be downsized.
- a heating device 1 shown in FIG. 1 is for heating a metal plate material (iron plate) 9 as an object (workpiece) for hot stamping to its quenching temperature (for example, 900 ° C.) before processing.
- the heating device 1 includes a transport device 2 and an infrared heater 3.
- the conveyance device 2 is a device that conveys the metal plate 9 in a certain direction (right direction in FIG. 1) in a conveyance path (continuous furnace) formed inside the heating device 1, and is driven to rotate in a certain direction, for example.
- a plurality of transport rollers are a plurality of transport rollers.
- the infrared heater 3 is disposed on the ceiling surface of the conveyance path, and the metal plate material 9 conveyed below is heated by radiant heat (radiant heat) due to heat generation. That is, a heating tank using the infrared heater 3 as a heat source is formed in the conveyance path of the metal plate material 9.
- the heating tank is roughly divided into an upstream heating tank 31 and a downstream heating tank 32 provided on the downstream side of the upstream heating tank 31 in the conveyance path.
- the upstream heating tank 31 and the downstream heating tank 32 are formed in a continuous space.
- the heating amount of the upstream heating tank 31 is set larger than that of the downstream heating tank 32.
- the amount of heating here means the amount of heat per unit time given to a heating object under certain conditions. When the heating conditions are constant, the amount of heating increases as the temperature of the heat source increases. Moreover, when heating a heating target object by atmospheric temperature, the heating amount becomes large, so that atmospheric temperature is high.
- the amount of heating by the downstream heating tank 32 is set so that the temperature of the metal plate 9 is not less than the Ac3 point and less than the boiling point of plating.
- the heating amount by the upstream heating tank 31 is set larger than the heating amount by the downstream heating tank 32.
- the Ac3 point is a temperature at which the metal plate material 9 undergoes austenite transformation by heating.
- the metal plate 9 is heated downstream while the temperature of the metal plate 9 is rising.
- the transport distance and transport speed in the upstream heating tank 31 are set so as to be transported to the tank 32.
- the upstream heating tank 31 with a large heating amount can raise the temperature of the metal plate 9 in a short time compared to the downstream heating tank 32. Therefore, the stay time of the metal plate 9 in the upstream heating tank 31 is set as long as possible as long as the temperature of the metal plate 9 does not rise excessively.
- the stay time of the metal plate 9 is longer in the upstream heating tank 31 than in the downstream heating tank 32. The staying time can be adjusted by changing at least one of the length of the conveyance path and the conveyance speed.
- the upstream infrared heater 3 (hereinafter referred to as “upstream heater 3 ⁇ / b> A”) in the transport path is referred to as the infrared heater 3 (hereinafter referred to as “downstream heater 3 ⁇ / b> B”) downstream of the upstream heater 3 ⁇ / b> A. ),
- the temperature is set higher. That is, in this embodiment, the amount of heating is adjusted by the heat source temperature, and the magnitude of the amount of heating in the above description can be read as the height of the heat source temperature.
- the target temperature of the metal plate 9 is T1- ⁇ (for example, a temperature near the quenching temperature), whereas the set temperature (heat source temperature) of the upstream heater 3A is sufficiently higher than T1 (for example, the quenching temperature). Temperature), the set temperature (heat source temperature) of the downstream heater 3B is T1- ⁇ (for example, a temperature higher than the quenching temperature, for example, ⁇ ⁇ ).
- the continuous furnace is divided into stages (zone control) in the first and second half in the longitudinal direction. In the first half stage, the temperature of the infrared heater 3 is set to be considerably higher than the target temperature, and the temperature of the metal plate 9 is raised in a short time. On the other hand, in the latter stage, the temperature of the infrared heater 3 is set to a temperature near the target temperature, and the temperature of the metal plate 9 is made uniform (stable) to the target temperature.
- the heating apparatus 1 the amount of heating by the downstream heating tank 32 is set so that the temperature of the metal plate 9 is not lower than the Ac3 point and lower than the boiling point of plating.
- the heating amount by the upstream heating tank 31 is set larger than the heating amount by the downstream heating tank 32. Therefore, according to the present embodiment, for example, as shown in FIG. 2, the metal plate 9 can be brought into a desired high temperature state (target temperature) in a short time as compared with a configuration in which heating is performed at a constant temperature (for example, T1- ⁇ ). It can be heated and then the temperature can be homogenized. Specifically, as shown in FIG.
- the heating method (C1) at a constant temperature is compared with the heating method (C1) as shown in FIG. As the temperature rises rapidly, the target temperature is reached in a short time.
- the upstream heating tank 31 is designed so that the residence time of the metal plate 9 is longer than that of the downstream heating tank 32. Therefore, according to the present embodiment, the time required for heating the metal plate 9 can be shortened as compared with the configuration in which the downstream heating bath 32 has a longer residence time of the metal plate 9 than the upstream heating bath 31. .
- the metal plate 9 is heated mainly by radiant (radiant) heating.
- radiant heating compared with the heating by gas combustion (convective heating), the heating amount can be easily changed.
- the heating efficiency can be increased.
- the temperature distribution can be clarified in a portion where the upstream heating tank 31 and the downstream heating tank 32 are continuous. As a result, variations in the temperature of the metal plate material 9 are suppressed, and for example, the residence time of the metal plate material in the upstream heating tank 31 can be set with higher accuracy, and the entire heating tank can be downsized.
- the heating device 1 corresponds to an example of a hot stamping heating device
- the upstream heating tank 31 corresponds to an example of a first heating tank
- the downstream heating tank 32 corresponds to an example of a second heating tank
- the metal plate 9 corresponds to an example of a metal material.
- the temperature of the metal plate material 9 may be detected, and at least one of conveyance control and temperature control may be performed according to the detected temperature. For example, control may be performed so that the temperature is raised to a predetermined temperature (for example, 800 ° C.) in the first stage and then sent to the second stage.
- a predetermined temperature for example, 800 ° C.
- a multi-stage (three-stage in this example) continuous furnace (a structure in which continuous heating furnaces are multi-stage) may be used.
- the length of the furnace can be shortened according to the number of stages, and the height can be suppressed because it is multistage and continuous.
- an elevator-type loading device 4 that directly connects to a continuous furnace and loads the metal plate material 9 from the destack into the continuous furnace, and a pressing device that directly connects to the continuous furnace and connects the metal plate material 9 from the continuous furnace.
- the elevator-type unloading device 5 that is unloaded to the side may be configured to move up and down, and one (common) loading device 4 and unloading device 5 may be used for a plurality of continuous furnaces.
- a dashed-dotted line shows the conveyance level before and behind a continuous path.
- the infrared heater 3 may be arranged at a position other than the ceiling surface (for example, below or on the side of the conveyance path) instead of or in addition to the ceiling surface of the conveyance path.
- Each component of the present invention is conceptual and is not limited to the above embodiment. For example, the functions of one component may be distributed to a plurality of components, or the functions of a plurality of components may be integrated into one component. Further, at least a part of the configuration of the above embodiment may be replaced with a known configuration having the same function.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Coating With Molten Metal (AREA)
- Tunnel Furnaces (AREA)
- Heat Treatment Of Articles (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
本発明の一側面においては、金属材を短時間で高温状態に加熱することが望ましい。
図1に示す加熱装置1は、ホットスタンプ加工の対象物(ワーク)としての金属板材(鉄板)9を、加工前にその焼入温度(例えば900℃)まで加熱するためのものである。加熱装置1は、搬送装置2と、赤外線ヒータ3と、を備える。なお、金属板材9としては、メッキが施された金属材(本実施形態ではZnメッキ材)が用いられる。
[A1]加熱装置1において、下流側加熱槽32による加熱量は、金属板材9の温度がAc3点以上でかつメッキの沸点未満となるように設定されている。一方、上流側加熱槽31による加熱量は、下流側加熱槽32による加熱量よりも大きく設定されている。したがって、本実施形態によれば、例えば図2に示すように一定の温度(例えばT1-α)で加熱する構成と比較して、金属板材9を短時間で所望の高温状態(狙い温度)に加熱することができ、その後、温度を均一化することができる。具体的には、図3に示すように、本実施形態のように前半を高温にした加熱方法(C2)によれば、図2に示す構成のように一定温度による加熱方法(C1)と比較して、温度上昇が急激になるため、短時間で狙い温度に到達する。
[B1]上記実施形態では、上流側加熱槽31による加熱量を下流側加熱槽32による加熱量よりも高くするために、熱源温度の高いヒータが用いられた構成を例示したが、これに限定されるものではない。例えば、加熱対象物を雰囲気温度で加熱する場合、雰囲気温度が高いほど加熱量が大きくなるため、雰囲気温度を異ならせてもよい。また例えば、上流側加熱槽31のヒータの量(密度)が、下流側加熱槽32のヒータの量(密度)よりも大きい構成としてもよい。
[B5]本発明の各構成要素は概念的なものであり、上記実施形態に限定されない。例えば、1つの構成要素が有する機能を複数の構成要素に分散させたり、複数の構成要素が有する機能を1つの構成要素に統合したりしてもよい。また、上記実施形態の構成の少なくとも一部を、同様の機能を有する公知の構成に置き換えてもよい。
Claims (3)
- メッキが施された金属材を搬送しながら加熱するためのホットスタンプ加工用加熱装置であって、
前記金属材の搬送路に設けられた第1の加熱槽と、
前記搬送路において前記第1の加熱槽よりも下流側に設けられた第2の加熱槽と、
を備え、
前記第2の加熱槽による加熱量は、前記金属材の温度がAc3点以上でかつ前記メッキの沸点未満となるように設定され、
前記第1の加熱槽による加熱量は、前記第2の加熱槽による加熱量よりも大きく設定されている
ことを特徴とするホットスタンプ加工用加熱装置。 - 請求項1に記載のホットスタンプ加工用加熱装置であって、
前記第1の加熱槽は、前記第2の加熱槽よりも前記金属材の滞在時間が長くなるように設計されている
ことを特徴とするホットスタンプ加工用加熱装置。 - 請求項1又は請求項2に記載のホットスタンプ加工用加熱装置であって、
前記第1の加熱槽及び前記第2の加熱槽は連続した空間に形成され、発熱源として赤外線ヒータが用いられている
ことを特徴とするホットスタンプ加工用加熱装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014556380A JP6050835B2 (ja) | 2013-01-11 | 2013-12-26 | ホットスタンプ加工用加熱装置 |
EP13871152.8A EP2944393B1 (en) | 2013-01-11 | 2013-12-26 | Heating device for hot stamping |
US14/759,771 US20150352621A1 (en) | 2013-01-11 | 2013-12-26 | Heating device for hot stamping |
CA2897287A CA2897287C (en) | 2013-01-11 | 2013-12-26 | Heating device for hot stamping |
US15/953,775 US10619925B2 (en) | 2013-01-11 | 2018-04-16 | Heating device for hot stamping |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-003723 | 2013-01-11 | ||
JP2013003723 | 2013-01-11 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/759,771 A-371-Of-International US20150352621A1 (en) | 2013-01-11 | 2013-12-26 | Heating device for hot stamping |
US15/953,775 Division US10619925B2 (en) | 2013-01-11 | 2018-04-16 | Heating device for hot stamping |
Publications (1)
Publication Number | Publication Date |
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WO2014109241A1 true WO2014109241A1 (ja) | 2014-07-17 |
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ID=51166897
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PCT/JP2013/084861 WO2014109241A1 (ja) | 2013-01-11 | 2013-12-26 | ホットスタンプ加工用加熱装置 |
Country Status (5)
Country | Link |
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US (2) | US20150352621A1 (ja) |
EP (1) | EP2944393B1 (ja) |
JP (1) | JP6050835B2 (ja) |
CA (1) | CA2897287C (ja) |
WO (1) | WO2014109241A1 (ja) |
Families Citing this family (2)
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US20150352621A1 (en) | 2013-01-11 | 2015-12-10 | Futaba Industrial Co., Ltd. | Heating device for hot stamping |
KR102312431B1 (ko) * | 2019-12-20 | 2021-10-12 | 현대제철 주식회사 | 용접성이 우수한 핫스탬핑 부품 및 그 제조방법 |
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JP2009176584A (ja) | 2008-01-25 | 2009-08-06 | Aisin Takaoka Ltd | 被加熱材の加熱装置及び加熱方法 |
WO2012026442A1 (ja) * | 2010-08-23 | 2012-03-01 | 新日本製鐵株式会社 | 亜鉛めっき鋼板のホットスタンプ方法 |
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US20150352621A1 (en) | 2013-01-11 | 2015-12-10 | Futaba Industrial Co., Ltd. | Heating device for hot stamping |
DE102013101489B3 (de) * | 2013-02-14 | 2014-06-05 | Benteler Automobiltechnik Gmbh | Wärmebehandlungslinie und Verfahren zum Betreiben der Wärmebehandlungslinie |
KR102015200B1 (ko) * | 2013-04-18 | 2019-08-27 | 닛폰세이테츠 가부시키가이샤 | 열간 프레스용 도금 강판, 도금 강판의 열간 프레스 방법 및 자동차 부품 |
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2013
- 2013-12-26 US US14/759,771 patent/US20150352621A1/en not_active Abandoned
- 2013-12-26 CA CA2897287A patent/CA2897287C/en active Active
- 2013-12-26 EP EP13871152.8A patent/EP2944393B1/en active Active
- 2013-12-26 WO PCT/JP2013/084861 patent/WO2014109241A1/ja active Application Filing
- 2013-12-26 JP JP2014556380A patent/JP6050835B2/ja active Active
-
2018
- 2018-04-16 US US15/953,775 patent/US10619925B2/en active Active
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JPH11256235A (ja) * | 1998-03-06 | 1999-09-21 | Nippon Steel Corp | 連続熱間圧延用鋼材の加熱操業方法 |
JP2009176584A (ja) | 2008-01-25 | 2009-08-06 | Aisin Takaoka Ltd | 被加熱材の加熱装置及び加熱方法 |
WO2012026442A1 (ja) * | 2010-08-23 | 2012-03-01 | 新日本製鐵株式会社 | 亜鉛めっき鋼板のホットスタンプ方法 |
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US10619925B2 (en) | 2020-04-14 |
CA2897287C (en) | 2017-06-06 |
JPWO2014109241A1 (ja) | 2017-01-19 |
EP2944393A1 (en) | 2015-11-18 |
US20150352621A1 (en) | 2015-12-10 |
JP6050835B2 (ja) | 2016-12-21 |
US20180231313A1 (en) | 2018-08-16 |
CA2897287A1 (en) | 2014-07-17 |
EP2944393B1 (en) | 2018-02-07 |
EP2944393A4 (en) | 2016-10-26 |
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