TW201639698A - Method for forming stamping member with a plurality of strengths and hot stamping forming apparatus therefor - Google Patents

Method for forming stamping member with a plurality of strengths and hot stamping forming apparatus therefor Download PDF

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Publication number
TW201639698A
TW201639698A TW104114025A TW104114025A TW201639698A TW 201639698 A TW201639698 A TW 201639698A TW 104114025 A TW104114025 A TW 104114025A TW 104114025 A TW104114025 A TW 104114025A TW 201639698 A TW201639698 A TW 201639698A
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Taiwan
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mold
forming
working surface
blank
hot stamping
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TW104114025A
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Chinese (zh)
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Wei-Liang Liu
Sheng-Chi Tsai
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Metal Ind Res &Development Ct
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Priority to TW104114025A priority Critical patent/TW201639698A/en
Priority to CN201610219721.0A priority patent/CN106077276A/en
Publication of TW201639698A publication Critical patent/TW201639698A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling

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

Abstract

Disclosed are a method for forming a stamped member with a plurality of strengths and a hot stamping forming apparatus employing the method. The apparatus comprises a first mold having a first working surface; a second mold having a second working surface, wherein when the second mold and the first mold are assembled, the second working surface and the first working surface form a molding chamber for shaping a blank material, the second mold comprising a first assembly and a second assembly, which may be individually disassembled from the first mold at different timing sequences, the second working surface comprising a merging surface of the first assembly and the second assembly. The forming method comprises: heating a blank material to a forming temperature; sandwiching the blank material between a first mold and a second mold; pressing the blank material with a first working surface and a second working surface; disassembling the first assembly; and performing in-mold quenching on a pressed area of the blank material.

Description

具複數強度的沖壓件之成形方法及其應用的熱沖壓成形裝置 Forming method of stamping part with complex strength and hot stamping forming device thereof

本發明係有關於一種具複數強度的沖壓件之成形方法及其應用的熱沖壓成形裝置，特別是有關於一種應用可分別退模之時間差以達成對工件不同部位產生空冷及模內淬火加工的熱沖壓成形裝置及沖壓件成形方法。 The present invention relates to a method for forming a stamping member having a plurality of strengths and a hot stamping forming apparatus therefor, and more particularly to a time difference in which a mold can be separately removed to achieve air cooling and in-mold quenching processing on different parts of the workpiece. Hot stamping forming apparatus and stamping forming method.

由於熱沖壓技術具有易成形、零件成形後機械性能佳、回彈少等優點。在此製程中材料被加熱至900℃以上，成形後急速冷卻使製品強度大幅提升。而由於某些熱沖壓件(例如車門鋼樑)，必需在不同部位具備不同的剛性。 Because the hot stamping technology has the advantages of easy forming, good mechanical properties after forming parts, and less rebound. In this process, the material is heated to above 900 ° C, and rapid cooling after forming greatly increases the strength of the product. And because some hot stampings (such as door steel beams), it is necessary to have different rigidity in different parts.

如圖1及圖2所示，中國CN 201110412533.7號「一種變強度超高強鋼熱沖壓件的成形方法」，其成形方法是通過改變與軟化部相應的凸、凹模模組10內的冷卻管道(11,11’)來實現，藉由通過減小冷卻管道直徑、增加管道之間的距離、增加管道到模具的表面距離的方法，減小板料的淬火程度，降低成形件的馬氏體含量，從而使該部分強度降低，得到變強度熱沖壓件，惟此一技術手段並無法在同一模具上靈活、機動地調整在沖壓件之同一部分結構上形成需所要的不同的強度程度。 As shown in Fig. 1 and Fig. 2, China CN 201110412533.7 "Forming method for forming a high-strength steel hot stamping of variable strength" is formed by changing a cooling duct in the convex and concave mold module 10 corresponding to the softening portion. (11,11') is achieved by reducing the quenching degree of the sheet and reducing the martensite of the formed part by reducing the diameter of the cooling pipe, increasing the distance between the pipes, and increasing the distance from the pipe to the surface of the mold. The content, so that the strength of the part is reduced, the variable strength hot stampings are obtained, but this technical means cannot flexibly and maneuverly adjust the different strength levels required to form the same part of the structure of the stamping part on the same mold.

如圖3所示，美國US 20120040205號「模內淬火的金屬部件的製造方法(Method for producing a press-quenched metal component)」，揭示一種預先記算工件12需要不同強度的位置，並在該位置的表面設置缺口121，再於熱沖壓模具13內進行熱沖壓及模內淬火的技術，前述缺口121因在模內淬火時不接觸模具，因而在該部位產生不同的強度。惟此技術工法必需破壞工件表面的完整性，在部分講究產品外觀的應用上，必需另外再進行表面處理的工序。 As shown in FIG. 3, US Pat. No. 20120040205, "Method for producing a press-quenched metal component", discloses a position in which the workpiece 12 needs different strengths, and at this position. The surface of the surface is provided with a notch 121, and in the hot stamping die 13, a technique of hot stamping and in-mold quenching is performed. The notch 121 does not contact the mold during quenching in the mold, and thus has different strength at the portion. However, this technical method must destroy the integrity of the surface of the workpiece. In some applications where the appearance of the product is required, a surface treatment process must be additionally performed.

本發明的目的在於提供一種結合自然空冷及模內淬火處理的熱沖壓成形裝置。 It is an object of the present invention to provide a hot stamping forming apparatus that combines natural air cooling and in-mold quenching.

本發明的再一目的在於提供一種同組模具的不同部位，在不同時間退模的成形方法，以在同一沖壓件的不同位置具有自然空冷及模內淬火處理之不同加工方式，以使該沖壓件產生不同的材料強度。 A further object of the present invention is to provide a forming method for demolding different parts of the same set of molds at different times, with different processing modes of natural air cooling and in-mold quenching treatment at different positions of the same stamping part, so that the stamping is performed. Pieces produce different material strengths.

為達成前述提供熱沖壓成形裝置的目的，本發明的技術手段包含：一第一模具，其係具有一第一工作面；一第二模具，其係具有一第二工作面，且第一、二模具合模時，該第二工作面與該第一工作面構成一造型腔室，以對該胚料進行成形，該第二模具包含可分別在不同時序相對於該第一模具進行退模的一第一組件與一第二組件，該第二工作面包含該第一組件與該第二組件之一合併表面。 In order to achieve the foregoing objective of providing a hot stamping forming apparatus, the technical means of the present invention comprises: a first mold having a first working surface; a second mold having a second working surface, and first When the two molds are closed, the second working surface and the first working surface form a modeling chamber for forming the blank, and the second mold comprises mold releasing relative to the first mold at different timings. a first component and a second component, the second working surface comprising a merged surface of the first component and the second component.

為達成前述提供成形方法的目的，本發明的技術手段包含下列步驟：提供前述的熱沖壓成形裝置；加熱一胚料至一成形溫度；置入該胚料於該第一模具與該第二模具之間；壓合該熱沖壓成形裝置以應用該第一工作面與該第二工作面接觸該胚料；進行該第二模具之該第一組件的退模，以釋放出該第二工作面的部分區域，令該胚料對應該部分區域的表面形成開放區域以接觸空氣；對該胚料之受壓合區域進行模內淬火處理，使該胚料之受壓合區域與該開放區域具有不同的冷卻速率而形成不同的材料強度。 In order to achieve the foregoing objective of providing a forming method, the technical means of the present invention comprises the steps of: providing the aforementioned hot stamping forming apparatus; heating a billet to a forming temperature; and placing the billet in the first mold and the second mold Pressing the hot stamping forming device to apply the first working surface to the second working surface to contact the blank; performing demolding of the first component of the second mold to release the second working surface a portion of the area, the blank corresponds to the surface of the partial area to form an open area to contact the air; the pressed area of the blank is subjected to in-mold quenching treatment, so that the pressed area of the blank and the open area have Different cooling rates result in different material strengths.

本發明的沖壓件成形裝置及成形方法，在高強度鋼在高溫(約930℃)的強度較低時(200~300MPa)，藉由熱沖壓模具對被加熱鋼材之工件第一次沖壓成需要的形狀的半成品之後/或在對被加熱鋼材之工作件在其淬火硬化之前， 預先退開部分模具，使加工件部分壓合於沖壓模具，並對壓合的部分進行模內淬火處理，以使該鋼材具有複強度，以達到經濟節省成本的效益。 In the stamping part forming apparatus and the forming method of the present invention, when the high-strength steel has a low strength at a high temperature (about 930 ° C) (200 to 300 MPa), the workpiece of the heated steel material is first punched by a hot stamping die. After the semi-finished product of the shape/or before the work piece of the heated steel is hardened by quenching, Part of the mold is pre-retarded, the workpiece is partially pressed into the stamping die, and the pressed portion is subjected to in-mold quenching treatment so that the steel has a complex strength to achieve economical cost-saving benefits.

10‧‧‧凸、凹模模組 10‧‧‧ convex and concave module

11,11’‧‧‧冷卻管道 11,11’‧‧‧Cooling pipe

12‧‧‧工件 12‧‧‧Workpiece

121‧‧‧缺口 121‧‧‧ gap

13‧‧‧熱沖壓模具 13‧‧‧Hot stamping die

20,20’‧‧‧熱沖壓成形裝置 20,20'‧‧‧Hot stamping forming device

21,21’‧‧‧第一模具 21,21’‧‧‧First mould

211‧‧‧第一工作面 211‧‧‧ first working surface

22,22’‧‧‧第二模具 22,22’‧‧‧ Second mould

221‧‧‧第二工作面 221‧‧‧Second work surface

222‧‧‧第一組件 222‧‧‧ first component

2221‧‧‧開放區域 2221‧‧‧Open area

223‧‧‧第二組件 223‧‧‧second component

2231‧‧‧受壓合區域 2231‧‧‧Compressed area

224‧‧‧合併表面 224‧‧‧Combined surface

24‧‧‧造型腔室 24‧‧‧Modeling chamber

30‧‧‧胚料 30‧‧‧Bullet

40‧‧‧沖壓件 40‧‧‧ Stampings

41‧‧‧第一強度區域 41‧‧‧First intensity zone

42‧‧‧第二強度區域 42‧‧‧second intensity zone

50‧‧‧冷卻流體循環單元 50‧‧‧Cooling fluid circulation unit

步驟S10~步驟S60‧‧‧具複數強度的沖壓件之成形步驟 Step S10 to Step S60‧‧‧ Forming Step of Stamping Parts with Complex Strength

[圖1]為先前技術之熱沖壓模具的一截面剖視圖；[圖2]為圖1之熱沖壓模具延伸的另一部位的截面剖視圖；[圖3]為先前技術之另一模內淬火的金屬部件的製造方法之結構示意圖；[圖4]為本發明一實施例之熱沖壓成形裝置的立體示意圖；[圖5]為本發明一實施例之具複數強度的沖壓件之成形方法流程圖；[圖6]至[圖8]為本發明一實施例之具複數強度的沖壓件之成形方法的結構流程圖；[圖9]為本發明一實施例之熱沖壓成形裝置嵌設有冷卻流體循環單元之側視剖面示意圖；[圖10]至[圖12]為本發明一實施例之應用具複數強度的沖壓件之成形方法加工胚料至沖壓件之成形示意圖。 1 is a cross-sectional view of a prior art hot stamping die; [FIG. 2] is a cross-sectional view of another portion of the hot stamping die of FIG. 1; [FIG. 3] is another in-mold quenching of the prior art. FIG. 4 is a schematic perspective view of a hot stamping forming apparatus according to an embodiment of the present invention; FIG. 5 is a flow chart showing a forming method of a stamping member having a plurality of strengths according to an embodiment of the present invention; [Fig. 6] to Fig. 8 are structural flowcharts showing a method of forming a stamping member having a plurality of strengths according to an embodiment of the present invention; [Fig. 9] a hot stamping forming apparatus in which cooling is embedded in an embodiment of the present invention A side cross-sectional view of a fluid circulation unit; [Fig. 10] to Fig. 12 are schematic views showing the forming of a blank for stamping by a forming method of a stamping member having a plurality of strengths according to an embodiment of the present invention.

茲配合圖式說明本發明之實施例如下。 The embodiment of the present invention will be described with reference to the drawings.

請先參照圖4、圖6至圖8所示。本實施例之熱沖壓成形裝置20，適於對一胚料30進行熱沖壓及模內淬火而成形為一沖壓件40，該熱沖壓成形裝置20包含一具有一第一工作面211的第一模具21以及一具有一第二工作面221的第二模具22。第二模具22與第一模具21合模時，該第二工作面221與該第一工作面211所圈圍的空間構成了一造型腔室24，該造型腔室24用以對該胚料30進行成形(及後續的模內淬火處理)，該第二模具22包含一第一組件222與一第二組件223，二 組件(222,223)可分別在不同時序相對於該第一模具21進行退模動作。其中，該第二工作面221包含該第一組件222與該第二組件223之一合併表面224，亦即該第二工作面221的全部或一部分是由該第一組件222與該第二組件223各自的一工作面所組合而成。 Please refer to FIG. 4 and FIG. 6 to FIG. 8 first. The hot stamping forming apparatus 20 of the present embodiment is adapted to form a stamping member 40 by hot stamping and in-mold quenching of a billet 30. The hot stamp forming apparatus 20 includes a first having a first working surface 211. The mold 21 and a second mold 22 having a second working surface 221. When the second mold 22 is clamped with the first mold 21, the space surrounded by the second working surface 221 and the first working surface 211 constitutes a modeling chamber 24, and the modeling chamber 24 is used for the blank. 30 performing forming (and subsequent in-mold quenching treatment), the second mold 22 includes a first component 222 and a second component 223, two The components (222, 223) can perform a mold ejection operation with respect to the first mold 21 at different timings, respectively. The second working surface 221 includes a combined surface 224 of the first component 222 and the second component 223, that is, all or a portion of the second working surface 221 is composed of the first component 222 and the second component. Each of 223's working faces is combined.

當然，在一熱沖壓成形裝置20’的實施例中，第一模具21’或第二模具22’嵌設有冷卻流體循環單元50(如圖9所示)。或者，第一模具21’與第二模具22’皆嵌設有冷卻流體循環單元50。 Of course, in an embodiment of the hot stamping forming apparatus 20', the first mold 21' or the second mold 22' is embedded with a cooling fluid circulation unit 50 (shown in Fig. 9). Alternatively, the first mold 21' and the second mold 22' are each provided with a cooling fluid circulation unit 50.

請再參照圖5，並配合圖4、圖6~圖8所示。本實施例之具複數強度的沖壓件之成形方法的步驟包含： Please refer to FIG. 5 again, and cooperate with FIG. 4 and FIG. 6 to FIG. The steps of the forming method of the stamping member having the complex strength of the embodiment include:

步驟S10，提供前述的的熱沖壓成形裝置(20,20’)。 In step S10, the aforementioned hot stamping forming apparatus (20, 20') is provided.

步驟S20，加熱一胚料30至一成形溫度(例如為930℃)，使其易於彎折成形。在一實施例中，該胚料30係為含肥粒鐵與波來鐵組織的板材，且在胚料30到達成形溫度下的加熱時間不超過10分鐘。 In step S20, a blank 30 is heated to a forming temperature (for example, 930 ° C) to make it easy to bend. In one embodiment, the billet 30 is a sheet of ferrite-containing iron and a ferrite structure, and the heating time at which the billet 30 reaches the forming temperature does not exceed 10 minutes.

步驟S30，將該加熱的胚料30快速地(例如其傳送時間在10秒之內)置入於該第一模具21與該第二模具22之間。 In step S30, the heated billet 30 is quickly placed (for example, its delivery time is within 10 seconds) between the first mold 21 and the second mold 22.

步驟S40，壓合該熱沖壓成形裝置(20,20’)以應用該第一工作面211與該第二工作面221接觸該胚料20。 In step S40, the hot stamping forming device (20, 20') is pressed to apply the first working surface 211 to the second working surface 221 to contact the billet 20.

步驟S50，進行該第二模具22之該第一組件222的退模(此時該第二組件223保持在原位置不跟著移動)，以釋放出該第二工作面221的部分區域，令該胚料30對應該部分區域的表面形成開放區域2221，以接觸空氣。 Step S50, performing demolding of the first component 222 of the second mold 22 (when the second component 223 is kept in the original position without moving) to release a partial area of the second working surface 221, so that the embryo The material 30 forms an open area 2221 corresponding to the surface of the partial area to contact the air.

步驟S60，對該胚料30之受壓合區域進行模內淬火處理，使該胚料之受壓合區域2231與該開放區域2221具有不同的冷卻速率而形成不同材料強度的沖壓件40。 In step S60, the nip area of the blank 30 is subjected to in-mold quenching treatment, so that the nip area 2231 of the billet and the open area 2221 have different cooling rates to form stamping members 40 having different material strengths.

如圖10~圖12所示，在進行前述成形方法的步驟過程中，胚料30可為一相同強度的板材(如圖10中所示的胚料30)或預先成形為所需要的形狀之預成形件(如圖11中所示的胚料30)。之後進行模具階段退模及模內淬火加工後形成的沖壓件40(如圖12中所示的沖壓件40)，其具有對應於該開放區域2221所形成的第一強度區域41及對應於該受壓合區域2231所形成的第二強度區域42。可以理解的是，該沖壓件40之第一強度區域41的材料強度不同於該第二強度區域42的材料強度。 As shown in FIGS. 10 to 12, during the steps of the foregoing forming method, the blank 30 may be a sheet of the same strength (such as the billet 30 shown in FIG. 10) or pre-formed into a desired shape. The preform (such as the blank 30 shown in Figure 11). Then, a stamping member 40 (such as the stamping member 40 shown in FIG. 12) formed after the mold stage demolding and in-mold quenching processing is performed, which has a first strength region 41 corresponding to the open region 2221 and corresponds to the The second intensity region 42 formed by the nip region 2231. It can be understood that the material strength of the first strength region 41 of the stamping member 40 is different from the material strength of the second strength region 42.

前述本發明所採用的技術手段之實施方式或實施例，並非用來限定本創作專利實施之範圍。即凡與本發明專利申請範圍文義相符，或依本發明專利範圍所做的均等變化與修飾，皆為本發明專利範圍所涵蓋。 The embodiments or examples of the technical means adopted by the present invention are not intended to limit the scope of implementation of the present patent. That is, the equivalent changes and modifications made in accordance with the scope of the patent application of the present invention or the scope of the invention are covered by the scope of the invention.

步驟S10~步驟S60‧‧‧具複數強度的沖壓件之成形步驟 Step S10 to Step S60‧‧‧ Forming Step of Stamping Parts with Complex Strength

Claims (8)

一種熱沖壓成形裝置，適於對一胚料進行熱沖壓及模內淬火而成形為一沖壓件，該裝置包含：一第一模具，具有一第一工作面；一第二模具，具有一第二工作面，且與該第一模具合模時，該第二工作面與該第一工作面構成一造型腔室，以對該胚料進行成形，該第二模具包含可分別在不同時序相對於該第一模具進行退模的一第一組件與一第二組件，該第二工作面包含該第一組件與該第二組件之一合併表面。 A hot stamping forming device is suitable for hot stamping and in-mold quenching of a blank to form a stamping. The device comprises: a first mold having a first working surface; and a second mold having a first a second working surface, and when the mold is closed with the first mold, the second working surface and the first working surface form a modeling chamber to shape the blank, and the second mold comprises a plurality of different timings respectively A first component and a second component are demolded in the first mold, and the second working surface comprises a combined surface of the first component and the second component. 如申請專利範圍第1項所述之熱沖壓成形裝置，其中，該第一模具或該第二模具的至少一者嵌設有冷卻流體循環單元。 The hot stamping and forming apparatus according to claim 1, wherein at least one of the first mold or the second mold is embedded with a cooling fluid circulation unit. 一種具複數強度的沖壓件之成形方法，其步驟包含：提供如申請專利範圍第1項或第2項所述的熱沖壓成形裝置；加熱一胚料至一成形溫度；置入該胚料於該第一模具與該第二模具之間；壓合該熱沖壓成形裝置以應用該第一工作面與該第二工作面接觸該胚料；進行該第二模具之該第一組件的退模，以釋放出該第二工作面的部分區域，令該胚料對應該部分區域的表面形成開放區域以接觸空氣；以及對該胚料之受壓合區域進行模內淬火處理，使該胚料之受壓合區域與該開放區域具有不同的冷卻速率而形成不同的材料強度。 A method for forming a stamping member having a plurality of strengths, comprising the steps of: providing a hot stamping forming apparatus according to claim 1 or 2; heating a billet to a forming temperature; and placing the billet in the billet Between the first mold and the second mold; pressing the hot stamping forming device to apply the first working surface to the second working surface to contact the blank; performing demolding of the first component of the second mold a portion of the second working surface is released to form an open area corresponding to the surface of the blank to contact the air; and the nip of the blank is subjected to in-mold quenching treatment to make the blank The nip area and the open area have different cooling rates to form different material strengths. 如申請專利範圍第3項所述之成形方法，其中，該胚料為含肥粒鐵與波來鐵組織的板材。 The forming method according to claim 3, wherein the billet is a sheet material containing ferrite iron and a ferrite structure. 如申請專利範圍第4項所述之成形方法，其中，該成形溫度為930℃。 The molding method according to claim 4, wherein the molding temperature is 930 °C. 如申請專利範圍第5項所述之成形方法，其中，該胚料到達該成形溫度下的加熱時間不超過10分鐘。 The forming method according to claim 5, wherein the billet reaches the forming temperature for a heating time of not more than 10 minutes. 如申請專利範圍第6項所述之成形方法，其中，該胚料移入該熱沖壓成形裝置之傳送時間係在10秒之內。 The forming method according to claim 6, wherein the transfer time of the blank into the hot stamping forming apparatus is within 10 seconds. 如申請專利範圍第4項所述之成形方法，其中，該胚料在移入該熱沖壓成形裝置模內成形加工前已預先成形為所需要的形狀的預成形件。 The forming method according to claim 4, wherein the blank is preformed into a preform of a desired shape before being moved into the in-mold forming process of the hot stamping forming apparatus.
TW104114025A 2015-05-01 2015-05-01 Method for forming stamping member with a plurality of strengths and hot stamping forming apparatus therefor TW201639698A (en)

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