WO2014171610A1 - 도금 강재의 열간 프레스 성형 장치 및 이를 이용한 성형 방법 - Google Patents
도금 강재의 열간 프레스 성형 장치 및 이를 이용한 성형 방법 Download PDFInfo
- Publication number
- WO2014171610A1 WO2014171610A1 PCT/KR2013/012110 KR2013012110W WO2014171610A1 WO 2014171610 A1 WO2014171610 A1 WO 2014171610A1 KR 2013012110 W KR2013012110 W KR 2013012110W WO 2014171610 A1 WO2014171610 A1 WO 2014171610A1
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- WIPO (PCT)
- Prior art keywords
- hot press
- press forming
- blank
- cam
- forming apparatus
- Prior art date
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Classifications
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/06—Stamping using rigid devices or tools having relatively-movable die parts
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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
- B21D22/20—Deep-drawing
- B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/34—Heating or cooling presses or parts thereof
Definitions
- the present invention relates to a hot press forming apparatus and a hot press forming method using the same, and more particularly, to a hot press forming apparatus and a method of plated steel.
- This molding problem can be solved by forming a material at a high temperature with good moldability, and quenching the mold at the same time to manufacture a high strength component.
- This approach is called Hot Press Forming (HPF). According to such a process, the component which has a strength of 1500 Mpa or more can be manufactured.
- the hot press molding is usually subjected to press working in a state where the blank is heated to 900 ° C. or more.
- the heating is performed, the blank surface of the steel material is oxidized to generate scale. Therefore, after forming the product, a separate process such as shot blasting for removing the scale is required, and the corrosion resistance of the product is also inferior to the plating material.
- Patent Document 1 by applying Al-based plating on the surface of the steel sheet to maintain the plating layer in the heating furnace while suppressing the oxidation reaction on the surface of the steel sheet to increase the corrosion resistance by using the passivation film of Al This was developed.
- Patent Document 1 US Patent No. 6,296,805
- One side of the present invention is a hot press of a plated steel material that can reduce the occurrence of micro cracks and secure uniform physical properties of the molded article when hot press forming using a plated steel material, in particular, a Zn-based plated steel material. It is to provide a molding apparatus and a hot press molding method using the same.
- One aspect of the present invention is a hot press forming apparatus comprising an upper mold and a lower mold,
- the upper mold and the lower mold provide a hot press apparatus of a plated steel material, which includes a cam that constrains a portion of the blank and forms an unconstrained portion of the blank to form a machined portion.
- Another aspect of the invention is a step of heating the blank
- the molding provides a hot press forming method of a plated steel material in which a part of the blank is constrained by an upper mold and a lower mold of a hot press forming apparatus, and an unconstrained part of the blank is molded by a cam to form a machined portion. .
- the present invention in the case of hot press forming a plated steel material, in particular, a Zn-based plated steel material, it is possible to reduce the occurrence of minute cracks in the molded part, thereby improving workability such as bending property of the molded product. In addition, it is possible to improve the quality of the manufactured molded article, in particular, there is an advantage that can ensure a uniform physical properties in the processing portion.
- FIG. 1 is a schematic diagram of a conventional hot press forming apparatus and method.
- FIG. 2 is a view of a processed portion of a molded article manufactured by a conventional hot press molding method.
- FIG 3 is a schematic view of the plastic strain of the molded article produced by a conventional hot press molding method.
- Figure 4 is a schematic diagram showing a hot press forming apparatus and method according to an embodiment of the present invention.
- FIG. 5 is a schematic view of the plastic strain of the molded article produced according to an embodiment of the present invention.
- Figure 6 is a schematic diagram showing a hot press forming apparatus and method according to another embodiment of the present invention.
- FIG. 7 is a schematic view of the plastic strain of the molded article prepared according to the conventional method, (b) is a plastic strain of the molded article prepared according to another embodiment of the present invention.
- Figure 8 (a) is a photograph of the processed part of the molded article manufactured by a conventional method
- Figure 8 (b) is a photograph of the processed part of the molded article manufactured according to another embodiment of the present invention.
- the inventors of the present invention in the case of hot press molding using a plated steel, in particular, Zn-based plated steel, a problem in which minute cracks (called microcracks or microcracks) occur in a molded part (molded product), in a processed part of a molded product
- microcracks or microcracks minute cracks
- FIG. 1 is a schematic diagram of a typical hot press molding. As shown in Fig. 1, hot press molding places a heated blank between an upper mold (also called an upper mold) and a lower mold (also called a lower mold), and then presses the blank into the upper mold and the lower mold. To produce a molded article.
- an upper mold also called an upper mold
- a lower mold also called a lower mold
- the plastic strain of the molded article as shown in FIG. 2 is analyzed and shown in FIG. 3.
- FIG. 3 when molding using a conventional hot press forming apparatus, it was found that excessive plastic deformation occurred at the processed portion of the molded product, and minute cracks occurred at the portion subjected to such excessive small deformation. .
- the processing unit is processed by the upper mold and the lower mold, the thickness thereof becomes thin, which is a fine gap is formed between the blank material and the mold.
- the uniform cooling is not performed in the mold cooling process after molding, thereby causing a problem of deterioration of the physical properties of the processed part.
- the present inventors have invented a hot press molding apparatus and a hot press molding method using the same, which can secure uniform physical properties of a molded article without generating the above minute cracks.
- the hot press forming apparatus of the present invention includes an upper mold and a lower mold for restraining a part of the blank, and a cam for forming an unworked part of the blank to form a machining portion.
- the cam forms a machining portion through a different direction of movement from the upper mold and the lower mold.
- the hot press forming apparatus of the present invention includes an upper mold and a lower mold, and further includes a cam between the upper mold and the lower mold.
- the conventional hot press forming apparatus as shown in FIG. 1 does not include the cam, and molding is performed while the upper mold and the lower mold restrain the blank at the time of pressing.
- the upper mold and the lower mold restrain a part of the blank at the time of press molding, and the unconstrained portion forms a processing part while the molding is completed by the cam.
- the hot press forming apparatus of FIG. 4 is formed separately from the upper mold and the lower mold, which move in the vertical direction, while the cam moves in the horizontal direction, to form a machining portion.
- the cam serves to disperse the amount of plastic deformation received in the processing part while forming the processing part. That is, as shown in Figure 4, the hot press forming apparatus of the present invention by the upper mold and the lower mold, the upper mold and the lower mold is molded while constraining a part of the blank at the time of molding, for the unconstrained portion of the cam Molding is completed by the movement.
- the hot press forming apparatus of FIG. 4 has a structure in which a separate cam is distinguished from the upper mold and the lower mold.
- FIG. 6 Another example of the hot press forming apparatus of the present invention is shown in FIG. 6.
- the cam in FIG. 6 shows a structure in which the cam is separated from the upper mold or the lower mold.
- the upper mold and the lower mold restrain the blank, but this serves to fix the blank, and substantially all the molding is performed by the cam. That is, the upper mold and the lower mold fix the blank, and the cam moves while having a constant angle to complete molding of the blank.
- FIG. 7A relates to a molded article manufactured by a conventional method. Comparing Fig. 7 (a) and (b), compared to the molded article (Fig. 7 (a)) manufactured by a conventional method, the molded article (Fig. 7 (b)) produced by the example of the present invention has a plastic deformation amount Notice the significant reduction.
- FIG. 8 (a) the surface of the molded part of the molded article molded by FIG. 6 was observed, and the result is shown in FIG. 8 (a).
- FIG. 8 (b) the surface of the processed part of the molded article formed by the usual hot press forming apparatus is shown. Indicated. Looking at Figure 8 (a), it can be seen that the surface of the molded article formed by the hot press molding apparatus of the present invention does not develop a large crack until the possession, in Figure 8 (b) to form a deep crack in the substrate It can be seen that.
- the present invention provides a hot press forming method of plated steel.
- the hot press molding method will be described in detail.
- the hot press forming method of the present invention after the blank is prepared, the blank is heated to be molded in a hot press forming apparatus.
- the forming process is performed by the upper mold and the lower mold of the hot press forming apparatus constraining part of the blank, and the cam of the hot press forming apparatus forms the unconstrained part of the blank. It is made by forming a machining part.
- FIG. 4 a part of the blank is constrained by the upper mold and the lower mold, and molding is performed on a part of the blank.
- the cam moves with respect to the unconstrained part, thereby finally forming a molding part.
- the upper mold restrains the lower mold, but molding is not performed by the upper mold and the lower mold, and the forming part is formed while the cam moves to form the processing part.
- the hot press molding of the present invention as shown in Figs. 4 and 6, it is possible to prevent the continuous deformation of plastic parts from being applied to the processing portion, thereby preventing the occurrence of minute cracks in the processing portion, and likewise the processing portion It can prevent that thickness becomes thin compared with a conventional method. Further, the processing portion improve the contact with the die through the pressure of the cam operation, in the end there is a technical advantage to this processing unit properties uniformly secured by the mold cooling.
- the process of heating the blank may heat the entire blank at the same temperature, a part of the blank is heated to a high temperature for the purpose of securing different strength (multi-strength) for the molded article, the other part is a lower temperature Heating method can be adopted.
- the heating may be performed when the entire blank is heated to a temperature of A3 or higher, or a part of the blank is heated to a temperature of A3 or higher, and other portions may be heated to a temperature of A1 or lower.
- the part heated at a high temperature in the molded part has a high strength, while in the part heated at a low temperature, It is possible to have different strength in one molded article.
- the heating method is not particularly limited in kind, any method can be applied as long as it can heat the steel in the technical field of the present invention.
- any method can be applied as long as it can heat the steel in the technical field of the present invention.
- atmospheric heating in a heating furnace may be applied, and an induction heating method may also be used.
- the cooling is preferably performed by mold cooling by a hot press forming apparatus, but is not limited thereto.
- the cooling conditions may be used a cooling method by a conventional hot press molding method.
Abstract
Description
Claims (9)
- 상부 금형 및 하부 금형을 포함하는 열간 프레스 성형장치에 있어서,상기 상부 금형 및 하부 금형은 블랭크의 일부를 구속하고, 상기 블랭크의 구속되지 않은 부분을 성형하여 가공부를 형성하는 캠을 포함하는 도금 강재의 열간 프레스 성형 장치.
- 청구항 1에 있어서,상기 캠은 상부 금형 및 하부 금형과 다른 운동방향을 갖는 도금 강재의 열간 프레스 성형 장치.
- 청구항 1에 있어서,상기 캠은 상부 금형과 하부 금형 사이에 위치되어 있는 구조를 갖는 도금 강재의 열간 프레스 성형 장치.
- 청구항 1에 있어서,상기 캠은 상부 금형 또는 하부 금형의 일부로부터 분리된 형태를 갖는 도금 강재의 열간 프레스 성형 장치.
- 블랭크를 가열하는 단계;상기 가열된 블랭크를 열간 프레스 성형장치에서 성형하는 단계; 및상기 성형된 블랭크를 냉각하는 단계를 포함하고,상기 성형은 열간 프레스 성형장치의 상부 금형 및 하부 금형에 의해 상기 블랭크의 일부가 구속되고, 상기 블랭크의 구속되지 않은 부분은 캠에 의해 성형되어 가공부를 형성하는 도금 강재의 열간 프레스 성형 방법.
- 청구항 5에 있어서,상기 캠은 상부 금형 및 하부 금형의 운동방향과 다른 운동 방향으로 이동하면서 성형하는 열간 프레스 성형 방법.
- 청구항 5에 있어서,상기 캠은 상부 금형과 하부 금형 사이에 위치되어 있는 도금 강재의 열간 프레스 성형 방법.
- 청구항 5에 있어서,상기 캠은 상부 금형 또는 하부 금형의 일부로부터 분리되어 형성되는 도금 강재의 열간 프레스 성형 방법.
- 청구항 5에 있어서,상기 가열은 블랭크의 전체를 A3 이상으로 가열하는 방법 또는블랭크의 일부는 A3이상으로 가열하고, 다른 부분은 A1 미만으로 가열하는 방법으로 행하는 도금 강재의 열간 프레스 성형 방법.
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CN201380077548.XA CN105307793A (zh) | 2013-04-19 | 2013-12-24 | 用于镀层钢板的热压成型装置和使用其的热压成型方法 |
JP2016508851A JP6106804B2 (ja) | 2013-04-19 | 2013-12-24 | めっき鋼材の熱間プレス成形装置及びこれを用いた成形方法 |
US14/785,301 US20160082496A1 (en) | 2013-04-19 | 2013-12-24 | Hot press forming device for coated steel and hot press forming method using same |
EP13882172.3A EP2987568B1 (en) | 2013-04-19 | 2013-12-24 | Hot press forming device for coated steel and hot press forming method using same |
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KR10-2013-0043485 | 2013-04-19 | ||
KR20130043485A KR101482395B1 (ko) | 2013-04-19 | 2013-04-19 | 도금 강재의 열간 프레스 성형 장치 및 이를 이용한 성형 방법 |
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PCT/KR2013/012110 WO2014171610A1 (ko) | 2013-04-19 | 2013-12-24 | 도금 강재의 열간 프레스 성형 장치 및 이를 이용한 성형 방법 |
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US (1) | US20160082496A1 (ko) |
EP (1) | EP2987568B1 (ko) |
JP (1) | JP6106804B2 (ko) |
KR (1) | KR101482395B1 (ko) |
CN (1) | CN105307793A (ko) |
WO (1) | WO2014171610A1 (ko) |
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JP2016190269A (ja) * | 2015-03-30 | 2016-11-10 | 株式会社ワイテック | 熱間プレス成形装置 |
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KR102240850B1 (ko) | 2020-07-10 | 2021-04-16 | 주식회사 포스코 | 생산성, 용접성 및 성형성이 우수한 열간 프레스 성형 부재의 제조 방법 |
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- 2013-04-19 KR KR20130043485A patent/KR101482395B1/ko active IP Right Grant
- 2013-12-24 US US14/785,301 patent/US20160082496A1/en not_active Abandoned
- 2013-12-24 CN CN201380077548.XA patent/CN105307793A/zh active Pending
- 2013-12-24 JP JP2016508851A patent/JP6106804B2/ja active Active
- 2013-12-24 EP EP13882172.3A patent/EP2987568B1/en active Active
- 2013-12-24 WO PCT/KR2013/012110 patent/WO2014171610A1/ko active Application Filing
Patent Citations (6)
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US6296805B1 (en) | 1998-07-09 | 2001-10-02 | Sollac | Coated hot- and cold-rolled steel sheet comprising a very high resistance after thermal treatment |
JP2009023000A (ja) * | 2002-09-11 | 2009-02-05 | Kobe Steel Ltd | 金属板のプレス成形用金型および金属板のプレス成形方法 |
JP2009101421A (ja) * | 2008-12-27 | 2009-05-14 | Press Kogyo Co Ltd | プレス品の伸び率を越える成形方法及び成形装置 |
KR101033361B1 (ko) * | 2010-06-30 | 2011-05-09 | 현대하이스코 주식회사 | 생산성을 향상시킨 열간 프레스 성형체 제조방법 |
KR20130015633A (ko) * | 2011-08-04 | 2013-02-14 | 부산대학교 산학협력단 | 전단하중 저감을 위해 열간프레스 성형품의 국부적 연화가 가능한 열간프레스 금형 |
JP2013039696A (ja) * | 2011-08-12 | 2013-02-28 | Ihi Aerospace Co Ltd | ダイスの製造方法とダイスを備えるホットプレス装置 |
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JP2016190269A (ja) * | 2015-03-30 | 2016-11-10 | 株式会社ワイテック | 熱間プレス成形装置 |
Also Published As
Publication number | Publication date |
---|---|
US20160082496A1 (en) | 2016-03-24 |
KR101482395B1 (ko) | 2015-01-13 |
CN105307793A (zh) | 2016-02-03 |
EP2987568A1 (en) | 2016-02-24 |
JP6106804B2 (ja) | 2017-04-05 |
EP2987568B1 (en) | 2018-08-01 |
EP2987568A4 (en) | 2016-05-18 |
KR20140125562A (ko) | 2014-10-29 |
JP2016518256A (ja) | 2016-06-23 |
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