WO2016088665A1 - Procédé de fabrication d'article moulé par estampage à chaud - Google Patents

Procédé de fabrication d'article moulé par estampage à chaud Download PDF

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Publication number
WO2016088665A1
WO2016088665A1 PCT/JP2015/083350 JP2015083350W WO2016088665A1 WO 2016088665 A1 WO2016088665 A1 WO 2016088665A1 JP 2015083350 W JP2015083350 W JP 2015083350W WO 2016088665 A1 WO2016088665 A1 WO 2016088665A1
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WIPO (PCT)
Prior art keywords
ductile
thermal strain
strain suppressing
high strength
annealing
Prior art date
Application number
PCT/JP2015/083350
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English (en)
Japanese (ja)
Inventor
小林　広和
章嘉 宮脇
英生 樋口
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to JP2016562416A priority Critical patent/JP6646588B2/ja
Publication of WO2016088665A1 publication Critical patent/WO2016088665A1/fr

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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
    • 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
    • B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
    • 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
    • B21D53/86—Making other particular articles other parts for bicycles or motorcycles
    • 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
    • C21D1/26—Methods of annealing
    • 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

Definitions

  • the present invention relates to a method for producing a hot stamped article, which heats a blank material and forms a high-strength article by hot stamp forming the heated blank material.
  • a part of the molded product is heated and annealed and annealed to a part of the molded product (hereinafter referred to as a ductile part)
  • a ductile part a part of the molded product
  • thermal deformation of the ductile portion can be suppressed by holding the ductile portion with a holder (see, for example, Patent Document 1).
  • annealing the formed article to make the ductile part have ductility, it becomes possible to use the ductile part as a welded joint such as spot welding, and it becomes possible to adopt the formed article to a frame of an automobile or the like.
  • the ductile portion is appropriately annealed when annealing the ductile portion. It is necessary to hold down the place where it is.
  • An object of the present invention is to provide a method of manufacturing a hot stamped molded product capable of suppressing thermal deformation of a ductile portion of the molded product.
  • the invention according to claim 1 is a heating step of heating the blank of the steel plate to an austenite structure, and a pressing step of integrally forming the heated blank into a high strength press part and a thermal strain suppressing portion by hot stamping.
  • the method for manufacturing a hot stamped article further includes a removal step of removing the thermal strain suppressing portion from the pressed part after annealing the adjacent portion to make it a ductile portion. Equipped with
  • the said thermal distortion suppression part has a bending flange erected in the outer side of the said press part.
  • a portion adjacent to the thermal strain suppressing portion in the pressed part is formed in a band shape, and in the annealing step, the portion formed in the band shape is spaced After fixing by a pair of clamps and annealing between the pair of clamps, the step of moving the pair of clamps and annealing between the moved pair of clamps is sequentially repeated to form the strip The ductile portion is obtained by annealing the continuous portions.
  • a high strength portion formed in a substantially U-shaped cross section on the pressed part by molding the pressed part, and an opening of the high strength portion And a pair of flanges projecting from the end to the outside of the high strength portion, wherein the pair of flanges are annealed to form a pair of ductile portions in the annealing step, and the pair of ductile portions are used as a weld portion Do.
  • the hot stamped pressed part is a high strength part. Therefore, when welding (for example, spot welding) a press part, there is a possibility that the peak of the narrowest softened portion in the heat affected zone may be generated around the welding portion by welding heat. For this reason, it is conceivable that stress is concentrated around the weld and a crack is generated. Therefore, in claim 5, the high strength portion and the pair of flanges are included in the press part, and the pair of flanges is annealed to form the ductile portion. Furthermore, a pair of ductile portions were used as welds.
  • the press part was equipped with the thermal distortion suppression part. Therefore, when the portion adjacent to the thermal strain suppressing portion is annealed to form the ductile portion, the thermal strain suppressing portion can suppress thermal deformation of the adjacent portion. That is, the thermal strain suppressing portion can suppress the thermal deformation of the ductile portion of the molded product. Thereby, for example, the accuracy of the hot stamped molded product can be ensured without repressing the molded product and correcting the shape of the molded product.
  • the thermal strain suppressing portion is removed from the pressed part in the removing step.
  • thermal deformation i.e., thermal strain
  • the thermal strain suppressing portion has a bending flange, and the bending flange is erected on the outside of the press part. Therefore, the rigidity of the thermal strain suppressing portion can be secured by the bending flange. Thereby, the thermal deformation of the ductile portion can be suitably suppressed.
  • the step of annealing between the pair of clamps is sequentially repeated, and the portion formed in the shape of a strip is made continuous and annealed to make the portion formed in the shape of a strip a ductile portion.
  • the belt-shaped portion is divided into a plurality of portions by a pair of clamps, and the divided portions are annealed, whereby thermal deformation of the divided region can be suitably suppressed by the pair of clamps. Thereby, the thermal deformation of the ductile portion can be suitably suppressed.
  • the pressed part includes the high strength portion and the pair of flanges, and the pair of flanges is annealed to form the pair of ductile portions. Furthermore, a pair of ductile portions were used as welds. Therefore, at the time of welding (for example, spot welding), it can suppress that the peak of the narrowest softened part in the heat affected zone is generated around the welded part by welding heat. Thereby, it is possible to prevent the occurrence of a crack due to concentration of stress around the weld.
  • FIG. 1 It is the schematic which shows the manufacturing method of the hot stamped molded article which concerns on this invention. It is a perspective view which shows the shaping
  • (A) is a perspective view which shows a vehicle provided with the high strength molded product which concerns on this invention, (b) is 14b-14b sectional view taken on the line of (a).
  • (A) is a top view which shows the forming raw material containing the inner panel of FIG. 14, (b) is 15b-15b sectional view taken on the line of (a).
  • (A) is a top view which shows the inner panel of FIG. 15, (b) is the 16b-16b sectional view taken on the line of (a).
  • (A) is a top view which shows the modification 5 of the molding raw material of Fig.15 (a), (b) is the 17b-17b sectional view taken on the line of (a).
  • (A) is a top view which shows the modification 6 of the molding raw material of Fig.15 (a), (b) is a 18b-18b sectional view taken on the line of (a).
  • FIG. 14A “front (Fr)”, “rear (Rr)”, “left (L)”, and “right (R)” follow the direction viewed from the driver.
  • the manufacturing method of the hot stamped molded article 10 which concerns on an Example is demonstrated.
  • the heating step E1 of heating the blank 12 of the steel plate and the heated blank 14 are formed of high strength forming material 14 (ie, the press part 15 and the left and right sides).
  • a removing step E4 of removing 16,17 the hot stamped molded article 10 will be described as the "high-strength molded article 10".
  • the heating step E1 after the coiled steel plate is cut into the blank 12 (that is, a flat plate material), the blank 12 is heated by the heating furnace 21 until the blank 12 has an austenitic structure.
  • the heated blank material 12 is hot stamped (that is, hot pressed) with a forming die 23 to obtain a formed material 14.
  • the forming material 14 comes into contact with the forming die 23 and is quenched to obtain the forming material 14 with high strength.
  • the forming material 14 has a press part 15 and left and right thermal strain suppressing portions (thermal strain suppressing portions) 16 and 17. That is, the press parts 15 and the left and right thermal strain suppressing portions 16 and 17 are integrally formed with high strength by hot stamping.
  • the pressed part 15 has a high strength portion 25 formed in a substantially U-shaped cross section, and a left joining flange 26 and a right joining flange 27 projecting from the open end 25 a of the high strength portion 25 to the outside of the high strength portion 25 And flanges).
  • the press part 15 is formed into a hat-like cross section by the high strength portion 25, the left joint flange 26 and the right joint flange 27.
  • the high strength portion 25 has a flat band-like top 31, a left side wall 32 bent downward from the left side of the top 31, and a right side wall 33 bent downward from the right side of the top 31. .
  • the high strength portion 25 is formed in a substantially U-shaped cross section by the top portion 31, the left side wall 32 and the right side wall 33.
  • a left joint flange (one of a pair of flanges) 26 protrudes outward in the left direction.
  • the left bonding flange 26 is a portion adjacent to the left thermal strain suppressing portion 16 and is formed in a band shape along the high strength portion 25.
  • a right joint flange (the other of the pair of flanges) 27 projects outward to the right.
  • the right bonding flange 27 is a portion adjacent to the right thermal strain suppressing portion 17 and is formed in a band shape along the high strength portion 25.
  • the left thermal strain suppressing portion 16 is integrally formed on the outer side of the left joint flange 26.
  • the left thermal strain suppressing portion 16 has a left connecting portion 35 connected to the outer side of the left connecting flange 26 and a left turn bending flange (folding flange) 36 which is raised upward from the side of the left connecting portion 35. That is, the left turn curved flange 36 is provided on the left outside of the press part 15.
  • the right thermal strain suppressing portion 17 is integrally formed on the outer side of the right joint flange 27.
  • the right thermal strain suppressing portion 17 has a right connecting portion 38 connected to the outer side of the right connecting flange 27, and a right bending flange (folding flange) 39 which is raised upward from the side of the right connecting portion 38. That is, the right bent flange 39 is provided upright on the right outside of the press part 15.
  • the left joint flange 26 is annealed by heating with a laser 58 and gradual cooling.
  • the high strength left joint flange 26 can be made the left ductile portion (ductile portion) 41.
  • the left ductile portion 41 is a soft zone having ductility by being annealed.
  • a high strength left thermal strain suppressing portion 16 is provided adjacent to the left joint flange 26 (left ductile portion 41). Therefore, when the left joint flange 26 is annealed to the left ductile portion 41, thermal deformation (that is, thermal strain) of the left ductile portion 41 is suppressed by the high strength left thermal strain suppressing portion 16.
  • the right bonding flange 27 can be made into a right ductile portion (ductile portion) 42 by annealing with a laser 58 in the same manner as the left bonding flange 26.
  • the right ductile portion 42 is a soft zone having ductility by being annealed.
  • a high-strength right thermal strain suppressing portion 17 is provided adjacent to the right joint flange 27 (right ductile portion 42). Therefore, when the right joint flange 27 is annealed to the right ductile portion 42, thermal deformation (that is, thermal strain) of the right ductile portion 42 is suppressed by the high-strength right thermal strain suppressing portion 17.
  • the left-turn curved flange 36 of the left thermal strain suppressing portion 16 was erected on the outside of the press part 15.
  • the right bending flange 39 of the right thermal strain suppressing portion 17 was set to stand on the outside of the press part 15. Therefore, the rigidity of the left thermal strain suppressing portion 16 can be secured by the left turn bending flange 36.
  • the rigidity of the right thermal strain suppressing portion 17 can be secured by the right bending flange 39.
  • the high strength portion 25, the left ductile portion 41 and the right ductile portion 42 form a high strength molded product (that is, a high strength frame) 10 (see FIG. 5) having a substantially hat-shaped cross section.
  • the left ductile portion is cut by cutting the left boundary 44 of the left thermal strain suppressing portion 16 (specifically, the left connecting portion 35) and the left ductile portion 41 with the laser 47.
  • the left thermal strain suppressing portion 16 is removed from 41.
  • the right thermal strain suppressing portion 17 is cut from the right ductile portion 42 by cutting the right thermal strain suppressing portion 17 (specifically, the right connecting portion 38) and the right boundary 45 of the right ductile portion 42 with the laser 47. Remove.
  • the left thermal strain suppressing portion 16 and the right thermal strain suppressing portion 17 are high strength molded articles Not used as 10.
  • the shapes of the left thermal strain suppressing portion 16 and the right thermal strain suppressing portion 17 can be formed large.
  • the thermal deformation of the left ductile portion 41 can be suitably suppressed by the left thermal strain suppressing portion 16.
  • the thermal deformation of the right ductile portion 42 can be suitably suppressed by the right thermal strain suppressing portion 17.
  • the left thermal strain suppressing portion 16 and the right thermal strain suppressing portion 17 are portions that are not used as the high strength molded product 10. As a result, there is no possibility that the left and right thermal strain suppressing portions 16 and 17 affect the high strength molded product 10, and the design freedom of the high strength molded product 10 can be secured.
  • hot stamped pressed parts are high strength parts. Therefore, when joining a press part by spot welding etc., there exists a possibility that the peak of the narrowest softened part of a heat affected zone may generate
  • the left ductile portion 41 and the right ductile portion 42 are portions having ductility.
  • welding heat generates a peak of the narrowest softened portion in the heat affected zone around the weld portion. Can be suppressed. Thereby, it is possible to prevent the occurrence of a crack due to concentration of stress around the weld. That is, the left ductile portion 41 and the right ductile portion 42 of the high strength molded product 10 can be used as a weld.
  • the annealing apparatus 50 includes a base 52 fixed to the floor 51, a mounting table (not shown) provided on the base 52 for mounting the press part 15, and an arrow AB on the base 52. Between the first and second clamp means (pair of clamps) 54, 55 provided on the support portion 53, and the first clamp means 54 and the second clamp means 55. And laser means 56 disposed at
  • the forming material 14 is placed in front of the support portion 53 by placing the forming material 14 on the mounting table.
  • the left joint flange 26 and the right joint flange 27 of the molding material 14 are disposed at positions where they can be gripped by the first clamp means 54 and the second clamp means 55.
  • FIG. 6 in order to facilitate understanding of the invention, an example in which the left joint flange 26 is gripped by the first clamp means 54 and the second clamp means 55 is described, and the description for gripping the right joint flange 27 is omitted. .
  • the left bonding flange 26 is gripped by the first clamp means 54 and the second clamp means 55 in a state where the forming material 14 is placed on the mounting table.
  • the first clamp means 54 and the second clamp means 55 are disposed on the front portion 53a of the support portion 53 at an interval L1 in the longitudinal direction (the direction of the arrow AB) of the left joint flange 26.
  • the first clamp means 54 includes a first upper clamp portion 61 disposed above the molding material 14 and a first lower clamp portion 62 disposed below the molding material 14.
  • the base 61 a of the first upper clamp portion 61 is supported by the front portion 53 a of the support portion 53 so as to be vertically movable.
  • the base 62 a of the first lower clamp portion 62 is supported by the front portion 53 a of the support portion 53 so as to be vertically movable.
  • the first upper clamp portion 61 is moved downward, and the first lower clamp portion 62 is moved upward.
  • the left joint flange 26 of the molding material 14 is gripped (that is, clamped) in the vertical direction by the end 61 b of the first upper clamp portion 61 and the end 62 b of the first lower clamp portion 62.
  • the second clamp means 55 includes a second upper clamp portion 64 disposed above the molding material 14 and a second lower clamp portion 65 disposed below the molding material 14.
  • the base 64 a of the second upper clamp portion 64 is vertically movably supported by the front portion 53 a of the support portion 53.
  • the base 65 a of the second lower clamp portion 65 is supported by the front portion 53 a of the support portion 53 so as to be vertically movable.
  • the second upper clamp portion 64 is moved downward, and the second lower clamp portion 65 is moved upward. Thereby, the left joint flange 26 of the forming material 14 is gripped (that is, clamped) by the tip 64 b of the second upper clamp portion 64 and the tip 65 b of the second lower clamp portion 65.
  • the left joint flange 26 is gripped by the first upper clamp portion 61 and the first lower clamp portion 62, and the second upper clamp portion 64 and the second lower clamp portion 65.
  • the left joint flange 26 is gripped.
  • the left joint flange 26 is fixed by the first clamp means 54 and the second clamp means 55 with an interval L1.
  • the support portion 53 in the arrow A direction (that is, the conveying direction of the molding material 14)
  • the molding material 14 is conveyed in the arrow A direction together with the first clamp means 54 and the second clamp means 55.
  • a laser means 56 is arranged between the first clamping means 54 and the second clamping means 55.
  • the laser means 56 is movably supported by the upper portion 53b of the support portion 53 in the direction of the arrow AB, and includes an irradiation portion 57 for irradiating the laser 58 downward.
  • the laser 58 is irradiated to the left bonding flange 26 by the irradiation of the laser 58 from the irradiation unit 57. In this state, by moving the laser means 56 in the direction of arrow A, the left joint flange 26 between the first clamp means 54 and the second clamp means 55 can be annealed by the laser 58.
  • the left joint flange 26 of the pressed part 15 is annealed to the left ductile portion 41 (see FIG. 3) by the annealing apparatus 50 (that is, the annealing step E3) will be described based on FIGS. Do.
  • the first fixing portion 26b of the left joint flange 26 is fixed by being gripped by the first clamp means 54.
  • the first fixed portion 26 b is separated from the left end portion 26 a of the left joint flange 26 by an interval L 1. That is, the left joint flange 26 is divided into the division range L1 by the first clamp means 54.
  • the laser 58 (see FIG. 6) is irradiated as shown by arrow A from the left end 26a of the left bonding flange 26 to the first fixing portion 26b to anneal the first annealing portion 71.
  • the first clamping means 54 and the second clamping means 55 are moved in the direction of arrow A.
  • the second fixing portion 26c is a portion adjacent to the left end portion 26a of the left bonding flange 26, and is located in the middle of the first annealing portion 71 (see FIG. 7A).
  • the third fixing portion 26 d of the left joint flange 26 is fixed by being gripped by the first clamp means 54.
  • the third fixed site 26d is separated from the second fixed site 26c by a distance L1. That is, the left joint flange 26 is divided into the division range L1 by the first clamp means 54 and the second clamp means 55.
  • the second annealing site 72 is annealed by irradiating the laser 58 (see FIG. 6) as shown by arrow A from the second fixing site 26c to the third fixing site 26d.
  • the distance L2 from the left end 26a of the left bonding flange 26 to the third fixing portion 26d is continuously annealed.
  • the first clamping means 54 and the second clamping means 55 are moved in the direction of arrow A.
  • the second clamp means 55 grips the fourth fixing portion 26e of the left joint flange 26. Fix by The fourth fixing portion 26e is located in the middle of the second annealing portion 72 (see FIG. 7B).
  • the fifth fixing portion 26 f of the left joint flange 26 is fixed by being gripped by the first clamp means 54.
  • the fifth fixed portion 26f is separated from the fourth fixed portion 26e by an interval L1. That is, the left joint flange 26 is divided into the division range L1 by the first clamp means 54 and the second clamp means 55.
  • the third annealing site 73 is annealed by irradiating the laser 58 (see FIG. 6) as shown by arrow A from the fourth fixing site 26e to the fifth fixing site 26f.
  • the distance L3 from the left end 26a of the left joint flange 26 to the fifth fixing part 26f is continuously annealed.
  • the first clamping means 54 and the second clamping means 55 are moved in the direction of arrow A.
  • the second clamp means 55 moves the (n-2) th fixing portion 26g of the left joint flange 26. Secure by holding the The (n-2) th fixed portion 26g is located in the middle of the (m-2) th annealed portion 74.
  • first (n-1) th fixed portion 26 h is fixed by being gripped by the first clamp means 54.
  • the (n ⁇ 1) th fixed portion 26 h is a portion adjacent to the right end portion 26 i of the left joint flange 26.
  • the (n-1) th fixing portion 26h is separated from the (n-2) th fixing portion 26g by a distance L1. That is, the left joint flange 26 is divided into the division range L1 by the first clamp means 54 and the second clamp means 55.
  • the laser 58 (see FIG. 6) is irradiated as shown by arrow A from the (n-2) fixed portion 26g to the (n-1) fixed portion 26h to burn the (m-1) annealed portion 75. I'm sorry.
  • a part of the (m ⁇ 2) annealed portion 74 overlaps with a part of the (m ⁇ 1) annealed portion 75, the portion from the left end 26 a of the left bonding flange 26 to the (n ⁇ 1) fixed portion 26 h
  • the distance L4 is continuously annealed.
  • the first clamp means 54 and the second clamp means 55 are moved in the direction of arrow A.
  • the second clamp means 55 Fixing by holding the fixing portion 26 j.
  • the (n) th fixed portion 26 j is located in the middle of the (m ⁇ 1) th annealed portion 75.
  • the (n) th fixing portion 26j is separated from the right end portion 26i of the left joint flange 26 by an interval L1. That is, the left joint flange 26 is divided by the second clamp means 55 into the division range L1.
  • the laser 58 (see FIG. 6) is irradiated as shown by arrow A from the (n) fixed portion 26j to the right end 26i of the left bonding flange 26 to anneal the (m) annealed portion 76.
  • the distance L5 from the left end 26a of the left bonding flange 26 to the right end 26i of the left bonding flange 26 is Continuously annealed.
  • the left joint flange 26 is annealed to the left ductile portion 41 (see FIG. 3).
  • the left joint flange 26 is divided into a plurality of divided ranges L1 by the first clamp means 54 and the second clamp means 55, and thermal deformation of the divided range L1 is achieved by sequentially annealing the divided ranges L1.
  • This can be suitably suppressed by the first and second clamp means 54, 55.
  • the thermal deformation of the left ductile portion 41 can be suitably suppressed.
  • the right bonding flange 27 shown in FIG. 6 the right bonding flange 27 can be made to be the right ductile portion 42 (see FIG. 3).
  • the thermal deformation of the right ductile portion 42 can be suitably suppressed as in the case of the left ductile portion 41.
  • the plate 81 is joined to the high strength molded product 10 to form a closed cross section member (that is, a closed cross section frame) will be described based on FIG.
  • a closed cross section member that is, a closed cross section frame
  • FIG. 9A in the high strength molded product 10 having a substantially hat-shaped cross section, the precision of the left ductile portion 41 and the right ductile portion 42 is secured. Therefore, the plate 81 can be accurately superimposed on the high strength molded product 10. Specifically, the left side portion 81 a of the plate 81 can be accurately superimposed on the left ductile portion 41 of the high strength molded product 10. Similarly, the right side portion 81 b of the plate 81 can be accurately superimposed on the right ductile portion 42 of the high strength molded product 10.
  • the left ductile portion 41 and the left side portion 81a are joined by spot welding at a joining portion 83 in a state in which the plate 81 is accurately superimposed on the high strength molded product 10.
  • the right ductile portion 42 and the right side portion 81b are joined at a joint 84 by spot welding.
  • the left ductile portion 41 and the right ductile portion 42 of the high strength molded product 10 are portions having ductility. Therefore, at the time of joining by spot welding etc., it can prevent that stress concentrates around a weld and a crack is generated. Thereby, the left ductile portion 41 and the left side portion 81a can be suitably joined by spot welding, and the right ductile portion 42 and the right side portion 81b can be suitably joined by spot welding. That is, the high strength molded article 10 and the plate 81 can form a highly rigid closed cross section frame.
  • the left thermal strain suppressing portion 92 is a high-strength portion which is projected flat from the outer side of the left joint flange 26 so as to be flush with the left joint flange 26. Therefore, when the left joint flange 26 is annealed to the left ductile portion 41 by the laser 58 (see FIG. 6), the thermal deformation of the left ductile portion 41 can be suppressed by the left thermal strain suppressing portion 92.
  • the right thermal strain suppressing portion 93 is a high-strength portion which is projected flatly from the outer side of the right joint flange 27 so as to be flush with the right joint flange 27. Therefore, when the right joint flange 27 is annealed to the right ductile portion 42 by the laser 58, the thermal deformation of the right ductile portion 42 can be suppressed by the right thermal strain suppressing portion 93.
  • the left thermal strain suppressing portion 92 is removed from the left boundary 90a of the forming material 90. Furthermore, the right thermal strain suppressing portion 93 is removed from the right boundary 90 b of the molding material 90.
  • a high-strength molded article 10 (see FIG. 5) with high accuracy is obtained. Therefore, the accuracy of the high strength molded article 10 can be secured without repressing the high strength molded article 10 to correct the shape of the high strength molded article 10. That is, according to the forming material 90 of the modified example 1, the same effect as the forming material 14 of the embodiment can be obtained.
  • the left thermal strain suppressing portion 96 is formed by being connected to the outer side of the left bonding flange 26 when the forming material 95 is hot stamped.
  • the left thermal strain suppressing portion 96 is a high strength portion having a bead 97 erected in a substantially U-shaped cross section. Therefore, when the left joint flange 26 is annealed to the left ductile portion 41 by the laser 58 (see FIG. 6), the thermal deformation of the left ductile portion 41 can be suppressed by the left thermal strain suppressing portion 96.
  • the right thermal strain suppressing portion 98 is formed by being connected to the outer side of the right bonding flange 27 when the forming material 95 is hot stamped.
  • the right thermal strain suppressing portion 98 is a high-strength portion having a bead 99 erected in a substantially U-shaped cross section. Therefore, when the right joint flange 27 is annealed to the right ductile portion 42 by the laser 58, the thermal deformation of the right ductile portion 42 can be suppressed by the right thermal strain suppressing portion 98.
  • the left thermal strain suppressing portion 96 is removed from the left boundary 95a of the forming material 95.
  • the right thermal strain suppressing portion 98 is removed from the right boundary 95 b of the forming material 95.
  • the forming material 102 of the third modification is one in which a pair of thermal strain suppressing portions 103 and 104 are provided at an interval L6 also on the top 31 of the forming material 14 of the embodiment.
  • the other configuration is the same as that of the molding material 14 of the embodiment.
  • a high strength molded product for example, as a framework of an automobile (that is, a vehicle body)
  • part which has a ductility in the top part of a high strength molded article is needed is considered. Therefore, in the forming material 102 of the third modification, a pair of thermal strain suppressing portions 103 and 104 are provided on the top 31 and a portion 31a between the pair of thermal strain suppressing portions 103 and 104 is annealed by a laser 58 (see FIG. 6). It was possible.
  • the pair of thermal strain suppressing portions 103 and 104 is formed in a bead having a substantially U-shaped cross section standing from the top 31.
  • the rigidity of the pair of thermal strain suppressing portions 103 and 104 is enhanced. Therefore, when the portion 31a between the pair of thermal strain suppressing portions 103 and 104 is annealed to the ductile portion 105 by the laser 58, the thermal deformation of the ductile portion 105 can be suppressed by the pair of thermal strain suppressing portions 103 and 104.
  • the ductile portion 105 is a portion having ductility.
  • a high-strength molded article 100 (see FIG. 12B) can be obtained.
  • the high strength molded product 100 has high accuracy by suppressing thermal deformation of the ductile portion 105, the left ductile portion 41 and the right ductile portion 42. Therefore, the accuracy of the high strength molded product 100 can be secured without repressing the high strength molded product 100 to correct the shape of the high strength molded product 100. That is, according to the forming material 102 of the third modification, the same effect as the forming material 14 of the embodiment can be obtained.
  • the top 31 can be used as a site to be joined by spot welding or the like. Applications can be expanded.
  • molding material 112 of the modification 4 is a high-strength member hot-stamped by planar view substantially rectangular shape.
  • the forming material 112 has a press part 113 provided at the center, and a thermal strain suppressing portion 114 connected to the peripheral edge 113 a of the press part 113.
  • the press part 113 is formed in a substantially rectangular shape in plan view, and has a pair of annealing parts 116 and 117 on both sides.
  • the ductile portion 118 is obtained by annealing the annealing portion 116 with a laser 58 (see FIG. 6). Similarly, by annealing the annealing portion 117 with a laser 58, the ductile portion 119 is obtained.
  • the pair of ductile portions 118 and 119 are portions having ductility.
  • the thermal strain suppressing portion 114 largely protrudes from the peripheral edge 113 a of the press part 113, and the outer shape of the thermal strain suppressing portion 114 is formed in a rectangular frame shape.
  • the thermal strain suppressing portion 114 is greatly expanded from the peripheral edge 113 a of the pressed part 113, whereby the rigidity of the thermal strain suppressing portion 114 is enhanced.
  • the thermal strain suppressing portion 114 can suppress the thermal deformation of the pair of ductile portions 118 and 119.
  • 13A FIG. 13 (FIG. 13 (FIG. 13 (FIG. 13 (FIG. 13 (FIG. 13 (FIG. 13)) by annealing the pair of annealed portions 116, 117 into the pair of ductile portions 118, 119 and removing the thermal strain suppressing portion 114 from the boundary 112 b) see).
  • the high strength molded product 110 has high accuracy by suppressing thermal deformation of the pair of ductile portions 118 and 119. Therefore, the accuracy of the high strength molded product 110 can be secured without repressing the high strength molded product 110 to correct the shape of the high strength molded product 110. That is, according to the forming material 112 of the modification 4, the same effect as the forming material 14 of the embodiment can be obtained.
  • a high strength molded product is adopted for the vehicle body 120 from the viewpoint of weight reduction etc.
  • high-strength molded articles are adopted for the left and right front side frames 121, the cross members 122, the left and right side sills 123, and the left and right upper members 124, which constitute a frame member of the vehicle body 120.
  • a high strength molded product is adopted for the right front side frame 121 will be described.
  • the right front side frame 121 is provided with a hot stamped high strength outer panel 126 and a hot stamped high strength inner panel 127.
  • the right front side frame 121 is formed in a closed cross section by the outer panel 126 and the inner panel 127.
  • the forming material 131 is a high-strength member hot-stamped into a substantially rectangular shape in plan view.
  • the forming material 131 has a press part 132 provided at the center, and a thermal strain suppressing part 133 connected to the peripheral edge 132 a of the press part 132.
  • the press part 132 is formed along the lower side of the high strength portion 135 formed in a substantially U-shaped cross section, the upper joining flange 136 formed along the upper side of the high strength portion 135, and the lower side. And a lower joint flange 137.
  • the thermal strain suppressing portion 133 has an outer shape formed in a substantially rectangular shape, and includes an upper bending flange 138 bent along the upper side and a lower bending flange 139 bent along the lower side.
  • the upper bending flange 138 and the lower bending flange 139 are provided on the outside of the press part 132.
  • the upper and lower ductile portions 141 , 142 can be suppressed by the thermal strain suppressing portion 133.
  • the inner panel ie, high strength
  • the thermal strain suppressing portion 133 is obtained by removing the thermal strain suppressing portion 133 from the boundary 131a of the forming material 131 A molded product) 127 (see FIG. 16) is obtained.
  • the upper ductile portion 141 and the lower ductile portion 142 have ductility by being annealed by the laser 58.
  • the inner panel 127 is maintained in accuracy by suppressing thermal deformation of the upper ductile portion 141 and the lower ductile portion 142. Therefore, the accuracy of the inner panel 127 can be secured without repressing the inner panel 127 to correct the shape of the inner panel 127.
  • the outer panel 126 is manufactured in the same manner as the inner panel 127.
  • the outer panel 126 has an upper ductile portion 144 extending along the upper side and a lower ductile portion 145 extending along the lower side.
  • the upper ductile portion 144 and the lower ductile portion 145 have ductility by being annealed by the laser 58 (see FIG. 6).
  • the upper ductile portion 144 of the outer panel 126 is joined to the upper ductile portion 141 of the inner panel 127 at a joint 147 of spot welding.
  • the lower ductility portion 145 of the outer panel 126 is joined to the lower ductility portion 142 of the inner panel 127 at a joint portion 148 of spot welding.
  • Modification 5 As shown in FIGS. 17 (a) and 17 (b), the molding material 150 of Modification 5 is obtained by replacing the thermal strain suppressing portion 133 of the molding material 131 of FIG. 15 with a thermal strain suppressing portion 151.
  • the structure of the molding material is the same as that of the molding material 131.
  • the thermal strain suppressing portion 151 is formed by being connected to the peripheral edge 132 a of the press part 132 when the forming material 150 is hot stamped.
  • the thermal strain suppressing portion 151 is a high strength portion having an upper bead 153 and a lower bead 154 which are erected in a substantially U-shaped cross section. By forming the upper bead 153 and the lower bead 154 in the thermal strain suppressing portion 151, the rigidity of the thermal strain suppressing portion 151 is secured by the upper bead 153 and the lower bead 154.
  • the thermal deformation of the upper ductile portion 141 can be suppressed by the thermal strain suppressing portion 151 (particularly, the upper bead 153).
  • the lower bonding flange 137 is annealed to the lower ductile portion 142 with the laser 58, thermal deformation of the lower ductile portion 142 can be suppressed by the thermal strain suppressing portion 151 (in particular, the lower bead 154).
  • the thermal strain suppressing portion 151 is removed from the boundary 150 a of the forming material 150.
  • an inner panel (that is, a high strength molded product) 127 (see FIG. 16) with high accuracy is obtained. That is, according to the forming material 150 of the fifth modification, the same effect as the forming material 131 of FIG. 15 can be obtained.
  • Modification 6 As shown in FIGS. 18 (a) and 18 (b), the molding material 160 of Modification 6 is obtained by replacing the thermal strain suppressing portion 133 of the molding material 131 of FIG. 15 with a thermal strain suppressing portion 161.
  • the structure of the molding material is the same as that of the molding material 131.
  • the thermal strain suppressing portion 161 is formed by being connected to the peripheral edge 132 a of the press part 132 when the forming material 160 is hot stamped.
  • the thermal strain suppressing portion 161 is largely projected outward from the peripheral edge 132a of the press part 132, and the outer shape is formed in a rectangular frame shape.
  • the thermal strain suppressing portion 161 is largely expanded from the peripheral edge 132 a of the pressed part 132, whereby the rigidity of the thermal strain suppressing portion 161 is secured.
  • the thermal strain suppressing portion 161 can suppress the thermal deformation of the upper ductile portion 141.
  • the thermal strain suppressing portion 161 can suppress the thermal deformation of the lower ductile portion 142.
  • the thermal strain suppressing portion 161 is removed from the boundary 160 a of the forming material 160.
  • an inner panel (that is, a high strength molded product) 127 (see FIG. 16) with high accuracy is obtained. That is, according to the forming material 160 of the modification 6, the same effect as the forming material 131 of FIG. 15 is obtained.
  • the manufacturing method of the hot stamped molded article which concerns on this invention is not limited to the Example mentioned above, A change, improvement, etc. can be carried out suitably.
  • the left joint flange 26 and the right joint flange 27 are annealed by the laser 58 has been described in the embodiment, the invention is not limited thereto.
  • the left joint flange 26 and the right joint flange 27 may be It is also possible to anneal in other ways.
  • High frequency induction heating is a commonly employed heating method in which the left joint flange 26 and the right joint flange 27 are heated by passing an alternating current through a coil.
  • the present invention is not limited thereto, and the left front side frame 121, the cross member 122, and left and right side sills It is also possible to adopt high strength molded articles as other members such as 123 and the upper members 124 on the left and right.
  • the hot stamped molded articles high strength molded articles
  • blanks blanks
  • pressed parts thermal strain suppressing portions
  • high strength portions joining flanges, bent flanges, ductile portions and first and second
  • the shape and configuration of the clamp means and the like are not limited to the illustrated ones, and can be changed as appropriate.
  • the present invention is a method for producing a hot stamped article for forming a high strength molded article by hot stamping a blank material, and the high strength molded article is suitable for application to automobiles.
  • Hot stamped molded products high strength molded products
  • Blanks 15, 113, 132 Stamped parts 16, 17, 92, 93, 96, 98 Left and right thermal strain suppressing parts (thermal strain suppressing parts) 25, 135 High strength part 25a Open end of high strength part 26
  • Left junction flange part adjacent to left thermal strain suppression part
  • Right joint flange site adjacent to the right thermal strain suppression part
  • Left and right bent flange folded flange
  • 41, 42 Left and right ductile part (ductile part) 54, 55 first and second clamp means (pair of clamps)
  • Ductile portion 114, 133, 151, 161
  • Thermal strain suppressing portion 116, 117 Annealing portion (portion adjacent to thermal strain suppressing portion)
  • Outer panel high strength molded product
  • Inner panel high strength molded product
  • 136, 137 upper and lower joining flanges site adjacent to the

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un article moulé par estampage à chaud comprenant une étape de chauffage (E1) consistant à chauffer une ébauche de tôle en acier (12), une étape de pressage (E2) consistant à mouler l'ébauche chauffée (12) par estampage à chaud dans un élément pressé hautement résistant (15) et des sections gauche et droite de suppression de déformation thermique (16, 17), et une étape de recuit (E3) consistant à soumettre des brides de raccordement gauche et droite (26, 27) à un recuit dans l'élément pressé (15). Lors de l'étape de recuit (E3), dans un état dans lequel la déformation thermique de la bride de raccordement gauche (26) est supprimée par la section gauche de suppression de déformation thermique (16), la bride de raccordement gauche (26) est recuite pour former une partie gauche ductile (41). De la même manière, dans un état dans lequel la déformation thermique de la bride de raccordement droite (27) est supprimée par la section droite de suppression de déformation thermique (17), la bride de raccordement droite (27) est recuite pour former une partie droite ductile (42).
PCT/JP2015/083350 2014-12-03 2015-11-27 Procédé de fabrication d'article moulé par estampage à chaud WO2016088665A1 (fr)

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WO2019187742A1 (fr) * 2018-03-30 2019-10-03 マツダ株式会社 Procédé de traitement de presse à chaud et dispositif de traitement
JP6664556B1 (ja) * 2018-10-10 2020-03-13 ユニプレス株式会社 プレス成形品の製造方法、保持具、及びプレス成形品の製造システム
WO2020075310A1 (fr) 2018-10-10 2020-04-16 ユニプレス株式会社 Procédé de fabrication d'article moulé à la presse, outil de retenue et système de fabrication d'article moulé à la presse
CN112739471A (zh) * 2018-09-19 2021-04-30 日本制铁株式会社 拼焊板、拼焊板的制造方法、压力成形品及压力成形品的制造方法

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JP7492050B2 (ja) 2018-03-09 2024-05-28 住友重機械工業株式会社 成形装置、成形方法、及び金属パイプ
WO2019171868A1 (fr) * 2018-03-09 2019-09-12 住友重機械工業株式会社 Dispositif de moulage, procédé de moulage et tuyau métallique
CN111788019A (zh) * 2018-03-09 2020-10-16 住友重机械工业株式会社 成型装置、成型方法及金属管
KR20200127977A (ko) * 2018-03-09 2020-11-11 스미도모쥬기가이고교 가부시키가이샤 성형장치, 성형방법, 및 금속파이프
JPWO2019171868A1 (ja) * 2018-03-09 2021-03-11 住友重機械工業株式会社 成形装置、成形方法、及び金属パイプ
US11440074B2 (en) 2018-03-09 2022-09-13 Sumitomo Heavy Industries, Ltd. Forming device, forming method, and metal pipe
KR102494386B1 (ko) 2018-03-09 2023-01-31 스미도모쥬기가이고교 가부시키가이샤 성형장치, 성형방법, 및 금속파이프
WO2019187742A1 (fr) * 2018-03-30 2019-10-03 マツダ株式会社 Procédé de traitement de presse à chaud et dispositif de traitement
JP7422080B2 (ja) 2018-09-19 2024-01-25 日本製鉄株式会社 テーラードブランク、テーラードブランクの製造方法、プレス成形品、及び、プレス成形品の製造方法
CN112739471A (zh) * 2018-09-19 2021-04-30 日本制铁株式会社 拼焊板、拼焊板的制造方法、压力成形品及压力成形品的制造方法
JPWO2020059804A1 (ja) * 2018-09-19 2021-09-30 日本製鉄株式会社 テーラードブランク、テーラードブランクの製造方法、プレス成形品、及び、プレス成形品の製造方法
US11945053B2 (en) 2018-09-19 2024-04-02 Nippon Steel Corporation Tailored blank, tailored blank manufacturing method, stamped part, and stamped part manufacturing method
WO2020075310A1 (fr) 2018-10-10 2020-04-16 ユニプレス株式会社 Procédé de fabrication d'article moulé à la presse, outil de retenue et système de fabrication d'article moulé à la presse
US11161164B2 (en) 2018-10-10 2021-11-02 Unipres Corporation Method for manufacturing a press-molded article, a retainer, and a manufacturing system for a press-molded article
JP6664556B1 (ja) * 2018-10-10 2020-03-13 ユニプレス株式会社 プレス成形品の製造方法、保持具、及びプレス成形品の製造システム

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