EP3219403B1 - Procédé de fabrication et dispositif de fabrication d'un article moulé par compression - Google Patents

Procédé de fabrication et dispositif de fabrication d'un article moulé par compression Download PDF

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Publication number
EP3219403B1
EP3219403B1 EP15859100.8A EP15859100A EP3219403B1 EP 3219403 B1 EP3219403 B1 EP 3219403B1 EP 15859100 A EP15859100 A EP 15859100A EP 3219403 B1 EP3219403 B1 EP 3219403B1
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EP
European Patent Office
Prior art keywords
region
ridge line
formed product
vertical wall
punch
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP15859100.8A
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German (de)
English (en)
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EP3219403A4 (fr
EP3219403A1 (fr
Inventor
Ryuichi Nishimura
Yoshiaki Nakazawa
Toru Yonebayashi
Seiya ISHII
Koichi Sato
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Nippon Steel Corp
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Nippon Steel Corp
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Publication date
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Publication of EP3219403A1 publication Critical patent/EP3219403A1/fr
Publication of EP3219403A4 publication Critical patent/EP3219403A4/fr
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Publication of EP3219403B1 publication Critical patent/EP3219403B1/fr
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Classifications

    • 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
    • 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
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor
    • 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
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments

Definitions

  • the present invention relates to a method and an apparatus for producing a press formed product used in automobiles, various vehicles other than automobiles, home appliances, vessels, architectural materials, etc.
  • the car body of an automobile includes various structural members (examples: floor cross members, side sills, side members, etc.).
  • Press formed products which use metal sheets such as steel sheets as their starting materials, are heavily used in the structural members. Due to the advantages over material rupture, shape fixability, and producing cost at the time of press forming, in many cases, a press formed product is obtained by performing press working on a metal sheet through bending forming.
  • the press formed product has, for example, a channel cross-section shape or a hat-shaped cross-section shape.
  • the press formed product having a channel cross-section includes a top panel part and a pair of vertical wall parts extending from the top panel part.
  • the press formed product having a hat-shaped cross-section further includes a pair of flange parts extending from the respective vertical wall parts.
  • FIG. 1 is an illustration schematically showing a configuration example of a press forming apparatus that performs general bending forming.
  • a press forming apparatus 1 is an apparatus for producing a press formed product having a channel cross-section or a hat-shaped cross-section.
  • FIG. 1 illustrates the case of producing a press formed product having a hat-shaped cross-section (see a dashed line in FIG. 1 ).
  • the press forming apparatus 1 includes a punch 2 as a lower die, and includes a die 3 and a pad 5, which are paired with the punch 2, as an upper die.
  • the pad 5 is supported by the die 3 or by an upper die holder or slide integrally operated with the die 3 via a pressure member 4.
  • the pad 5 can be received in the die 3, and constitutes a part of the die 3 with being received in the die 3.
  • the bending forming of forming a metal sheet 6 into a press formed product by such press forming apparatus 1 is performed as follows. Before the forming, the metal sheet 6 is sandwiched between the punch 2 and the pad 5. That is, before staring the pushing-in of the metal sheet 6 into the die 3 by the punch 2, a portion of the metal sheet 6, which portion is formed into a top panel part of the press formed product, is restrained by the punch 2 and the pad 5. In this state, the die 3 is descended to a bottom dead point. In this manner, the top panel part of the press formed product is formed along a top surface (a front end surface) 2a of the punch 2. Vertical wall parts are formed along side surfaces 2b of the punch 2. Ridge line parts are formed between the top panel part and the vertical wall parts. The ridge line parts connecting the top panel part to the vertical wall parts are formed along punch shoulder parts 2c of the punch 2.
  • such bending forming is referred to as the pad bending forming.
  • a high-strength steel sheet having a tensile strength of 440 MPa or more is used as the metal sheet 6, which is the starting material of the structural member.
  • a 590 MPa-class high-strength steel sheet is also used, and in some cases, a 980 MPa-class high-strength steel sheet, or even a 1180 MPa-class high-strength steel sheet is used.
  • the shapes of the structural members may become relatively complex. This is because of the design constraints, such as prevention of the interference between the structural members and the other members, bonding between the structural members and the other members, securing of a desired space, etc.
  • FIGS. 2 to 8 are perspective views showing examples of press formed products having relatively complex shapes.
  • FIG. 2 shows a first exemplary press formed product 7 formed from a high-strength steel sheet having a tensile strength of 590 MPa or more (an alloyed hot-dip galvanized steel sheet made of DP (Dual Phase) steel having a sheet thickness of 1.2 mm).
  • FIGS. 3 to 8 show second to seventh exemplary press formed products 7 formed from a high-strength steel sheet having a tensile strength of 440 MPa or more (an alloyed hot-dip galvanized steel sheet, a non-plated steel sheet, etc. having a sheet thickness of about 1.2 mm), respectively.
  • each of the cross-section shapes of the first to seventh exemplary press formed products 7 is a hat shape. That is, each of the press formed products 7 includes a top panel part 7a, vertical wall parts 7c extending from the left and right ends of the top panel part 7a, ridge line parts 7b between the top panel part 7a and the vertical wall parts 7c, and flange parts 7d extending from the lower ends of the respective vertical wall parts 7c. Further, the press formed product 7 includes shape-changing parts 9 in parts of the ridge line parts 7b.
  • the shape-changing parts 9 are provided in both of the ridge line parts 7b on both ends of the top panel part 7a.
  • the height of the ridge line parts 7b is changed at local portions located substantially in the middle of the lengthwise direction of the press formed product 7.
  • a step height part 8 is formed in the top panel part 7a in a region connecting the shape-changing parts 9 to each other.
  • the shape-changing parts 9 are provided in both of the ridge line parts 7b on both ends of the top panel part 7a.
  • the height of the ridge line parts 7b is changed in a wide area substantially in the middle of the lengthwise direction of the press formed product 7.
  • the height of the top panel part 7a gently changes corresponding to the positions of the shape-changing parts 9.
  • the shape-changing part 9 is provided in one of the ridge line parts 7b on both ends of the top panel part 7a.
  • This shape-changing part 9 change the arc length in a cross section of the ridge line part 7b at a local portion substantially in the middle of the lengthwise direction of the press formed product 7.
  • the angle between the top panel part 7a and the vertical wall part 7c changes corresponding to the position of the shape-changing part 9.
  • the shape-changing parts 9 are provided in both of the ridge line parts 7b on both ends of the top panel part 7a.
  • the ridge line parts 7b are twisted in a wide area substantially in the middle of the lengthwise direction of the press formed product 7.
  • the top panel part 7a and the vertical wall parts 7c are twisted corresponding to the positions of the shape-changing parts 9.
  • the shape-changing parts 9 are provided in both of the ridge line parts 7b on both ends of the top panel part 7a.
  • the ridge line parts 7b are warped in the width direction of the press formed product 7 in a wide area substantially in the middle of the lengthwise direction of the press formed product 7.
  • the top panel part 7a and the vertical wall parts 7c are warped in the width direction of the press formed product 7 corresponding to the positions of the shape-changing parts 9.
  • the shape-changing part 9 is provided in one of the ridge line parts 7b on both ends of the top panel part 7a.
  • this ridge line part 7b is hollowed in the width direction of the press formed product 7 at a local portion substantially in the middle of the lengthwise direction of the press formed product 7.
  • the top panel part 7a and the vertical wall parts 7c are hollowed in the width direction of the press formed product 7 corresponding to the position of the shape-changing part 9.
  • the shape-changing part 9 is provided in one of the ridge line parts 7b on both ends of the top panel part 7a.
  • the radius of curvature of a cross section of the ridge line part is changed in an area from substantially in the middle to one end of the lengthwise direction of the press formed product 7.
  • the width of the top panel part 7a and the height of the vertical wall part 7c are changed corresponding to the position of the shape-changing part 9.
  • Such a wrinkle similarly occurs even in the second to seventh exemplary press formed products 7 shown in FIGS. 3 to 8 .
  • Aiming to suppress the occurrence of such a wrinkle reduces the degree of freedom in designing the structural members. This is because the various dimensions of the shape-changing parts 9 in the ridge line parts 7b are restricted in accordance with the press formability of a high-strength steel sheet, which is a starting material.
  • Patent Literature 1 Japanese Patent Application Publication No.2010-115674
  • Patent Literature 2 Japanese Patent Application Publication No. 2012-024837
  • Patent Literature 1 discloses the technique for applying concavo-convex beads to vertical wall parts and flange parts. With the application of the beads, the line length difference is reduced that is generated in an end part of a starting material before and after bending forming. In this manner, the generation of wrinkles is suppressed.
  • Patent Literature 2 is directed to the production of a press formed product having a hat-shaped cross-section shape and bent in the width direction, and discloses the technique for suppressing wrinkles generated in outer vertical wall parts, etc. of a bending portion of the press formed product.
  • an excess thickness portion is provided only on the outer side of the bending portion.
  • the excess thickness portion is bent in the direction opposite to the press direction by upper and lower dies, and is also sandwiched between the dies. In this manner, tensile force is applied to the outside of the bending portion, and the generation of wrinkles is suppressed.
  • EP2796221 forming the basis for the preamble of claim 5, discloses a press-formed product that enables inexpensively providing a shock-absorbing member having a high crashing load with respect to a three-point bending load is provided.
  • the press-formed product is a press-formed product of a steel sheet, the press-formed product including a body having a hat-shaped cross section and extending in a direction, the transverse cross section including a bottom portion and a shoulder portion that is contiguous to the bottom portion through an R end.
  • a first region from the R end to a position a predetermined distance away in a direction in which the bottom portion extends, and a second region that is a part of the bottom portion and is contiguous to the first region have a work-hardening distribution introduced by press-forming of the body, the work-hardening distribution being one in which average hardness Hv1 of an area of the first region from a surface of the steel sheet to a position with a depth obtained by multiplying a thickness of the steel sheet by 0.2 and average hardness Hv2 of an area of the second region from the surface of the steel sheet to the position obtained by multiplying the thickness of the steel sheet by 0.2 satisfy a relationship of Hv1 > 1.05 x Hv2.
  • EP 2 796 221 there is also known a method for producing a press formed product from a starting material, the press formed product comprising a top panel part, vertical wall parts respectively extending from both ends of the top panel part, and ridge line parts between the vertical wall parts and the top panel part, the producing method comprising: a preparation step of preparing a metal sheet as the starting material; and a press working step of performing press working on the starting material by using a punch, and a pad and a die that are paired with the punch, and the press working step including: a first step of forming, by the punch and the pad, at least a region of the top panel part; and a second step of forming, subsequent to the first step, by the punch and the die, the remaining regions, with the starting material sandwiched between the punch and the pad.
  • Patent Literature 2 cannot be necessarily applied to the production of all of the above-described first to seventh exemplary press formed products 7. Additionally, according to this technique, because the excess thickness portion exists, the yield reduction cannot be avoided.
  • An object of the present invention is to provide a producing method and a producing apparatus of a press formed product that can reduce the generation of wrinkles in the region of the shape-changing part and the region in the vicinity thereof, even in the case where, for example, a high-strength steel sheet is used as the starting material, when forming the press formed product having a channel cross-section or a hat-shaped cross-section and including a shape-changing part in a part of the ridge line parts.
  • the predetermined height is 2 mm or more from the border between the vertical wall part and the ridge line part, and is equal to or less than a half of the total height of the vertical wall part.
  • the producing method of the above-described (1) can employ the following configuration.
  • the entire region of the top panel part, the entire region of each of the ridge line parts, and a region up to the predetermined height from the border between the vertical wall part and the ridge line part of a region of each of the vertical wall parts are formed by the punch and the pad.
  • a region beyond the predetermined height of the region of each of the vertical wall parts is formed by the punch and the die.
  • the producing method of the above-described (1) can employ the following configuration.
  • the shape-changing part of the ridge line part is at least one of (a) to (f) as follows:
  • a producing apparatus is an apparatus for producing a press formed product from a starting material
  • the predetermined height is 2 mm or more from the border between the vertical wall part and the ridge line part, and is equal to or less than a half of the total height of the vertical wall part.
  • the producing apparatus according to the above-described (2) can employ the following configuration.
  • the bottom surface of the pad corresponds to the entire region of the top panel part.
  • Each of the corner parts of the pad corresponds to the entire region of each of the ridge line parts.
  • Each of the inner side surfaces of the pad corresponds to a region up to the predetermined height from the border between the vertical wall part and the ridge line part of a region of each of the vertical wall parts.
  • the die includes inner side surfaces corresponding to regions beyond the predetermined height of regions of the respective vertical wall parts.
  • the die is divided to correspond to each of the vertical wall parts.
  • the producing apparatus includes a die moving mechanism that moves each of the dies toward a respective one of the side surfaces of the punch after completion of pushing-in of the starting material into the pad by the punch.
  • the present invention it is possible to reduce the occurrence of a wrinkle in the region of the shape-changing part and the region in the vicinity thereof, even in the case where, for example, a high-strength steel sheet is used as the starting material, when forming the press formed product having a channel cross-section or a hat-shaped cross-section including the shape-changing part in a part of the ridge line part.
  • the region formed into the ridge line part and the region formed into the vertical wall part are processed sequentially with the pushing-in of the punch into the die, after the region of the top panel part is restrained by the punch and the pad.
  • the generation of wrinkles can be reduced by suppressing the excessive material excess in the region of the shape-changing part and the region in the vicinity thereof.
  • the region restrained by the punch and the pad from the early phase of the press working (hereinafter referred to as the "restrained region") should be increased.
  • the restrained region is not only the region of the top panel part, but also the region of the shape-changing part and a part of the region of the vertical wall part adjacent to the shape-changing part, where a wrinkle is likely to be generated. In this manner, at the time of press working, there is no room for a material excess to be generated in the region of the shape-changing part and the region in the vicinity thereof, and the generation of wrinkles is reduced.
  • FIGS. 9 to 11 are perspective views showing an example of the structure of a producing apparatus used in producing a press formed product in a first embodiment of the present invention.
  • Each of the producing apparatuses 10 shown in FIGS. 9 to 11 is a press forming apparatus.
  • the press forming apparatus 10 shown in FIG. 9 is an apparatus that produces the first exemplary press formed product 7 having the hat-shaped cross-section shown in the above-described FIG. 2 .
  • the press forming apparatus 10 shown in FIG. 10 is an apparatus that produces the second exemplary press formed product 7 having the hat-shaped cross-section shown in the above-described FIG. 3 .
  • the press forming apparatus 10 shown in FIG. 11 is an apparatus that produces the sixth exemplary press formed product 7 having the hat-shaped cross-section shown in the above-described FIG. 7 .
  • FIGS. 12A to 12C are diagrams showing the statuses of the press working step by the producing apparatus of the first embodiment.
  • FIG. 12A shows the state before starting the forming.
  • FIG. 12B shows the state of the early phase of the forming.
  • FIG. 12C shows the state at the completion of the forming.
  • These figures show the cross sections of the region(s) of the shape-changing part(s).
  • the press forming apparatus 10 includes a punch 11 as a lower die, and includes a die 12 and a pad 13 as an upper die. That is, the punch 11 makes a pair with the die 12 and the pad 13. Note that FIGS. 9 to 11 show the die 12 by a dashed line, so as to facilitate the understanding of the structure.
  • the punch 11 includes a top surface 1 1a (a front end surface), a pair of side surfaces 1 1b, and punch shoulder parts 11c provided between the top surface 11a and the side surfaces 11b.
  • the punch shoulder parts 11c are regions connecting the top surface 1 1a to the side surfaces 11b.
  • the shape of the top surface 1 1a is the shape corresponding to the region of the top panel part 7a of the press formed product 7.
  • the shapes of the side surfaces 11b are the shapes corresponding to the region of the vertical wall parts 7c of the press formed product 7.
  • the shape of the punch shoulder part 1 1c is the shape corresponding to the region of the ridge line part 7b (including the shape-changing part 9) of the press formed product 7.
  • the punch shoulder part 11c is provided with a shape-changing part in a part of the longitudinal direction of the punch 11.
  • the shape of the shape-changing part of the punch shoulder part 11c is the shape corresponding to the region of the shape-changing part 9 that exists in a part of the ridge line part 7b of the press formed product 7.
  • the punch shoulder part 11c includes a portion where the cross-section shape changes in the longitudinal direction of the punch 11, or where the extending direction of the punch shoulder part 11c is bent.
  • the pad 13 is arranged opposed to the top surface 11a of the punch 11.
  • the pad 13 includes a bottom surface 13a, a pair of inner side surfaces 13b, and corner parts 13c.
  • the corner parts 13c are portions that connect the bottom surface 13a to the inner side surfaces 13b.
  • the shape of the bottom surface 13a is the shape corresponding to the region of the top panel part 7a of the press formed product 7. That is, the bottom surface 13a opposes the top surface 11a of the punch 11, and its shape is the shape conforming to the top surface 11a of the punch 11.
  • the shape of the corner part 13c is the shape corresponding to the region of the ridge line part 7b (including the shape-changing part 9) of the press formed product 7.
  • the corner part 13c opposes the punch shoulder part 11c, and its shape is the shape conforming to the punch shoulder part 11c.
  • the shape conforming means the shape where the convexity and concavity of the opposing portions with the material metal sheet sandwiched therebetween is inverted.
  • the inner side surface 13b opposes a part of the side surface 11b of the punch 11.
  • the shape of the inner side surface 13b is the shape corresponding to the region having a predetermined height h from the border between the vertical wall part 7c and the ridge line part 7b of the region of the vertical wall part 7c of the press formed product 7 (see FIG. 12C ).
  • the pad 13 is supported by an upper die holder integrally operated with a slide via a pressure member.
  • the pressure member is a hydraulic cylinder, a gas cylinder, a spring, a rubber, etc., and applies a downward force (a force directed to the punch 11) to the pad 13.
  • the pad 13 may be supported by a slide that operates integrally with the upper die holder.
  • the die 12 is divided into two, and each of the dies 12 is arranged on each of the outer sides of the pad 13.
  • Each of the dies 12 includes an inner side surface 12a.
  • the shape of the inner side surface 12a is the shape corresponding to the region beyond the predetermined height h of the region of the vertical wall part 7c of the press formed product 7. That is, the inner side surface 12a opposes a region of the regions of the side surface 11b of the punch 11 except for the regions opposing the inner side surface 13b of the pad 13.
  • Each of the dies 12 is connected to the upper die holder or slide via a die moving mechanism such as a cam.
  • the die moving mechanism moves each of the dies 12 obliquely downward to a respective one of the side surfaces 11b of the punch 11 (see the outlined arrows in FIG. 12B ).
  • the producing method of the press formed product 7 using such press forming apparatus 10 according to the first embodiment includes a preparation step and a press working step as follows.
  • a metal sheet 14 is prepared as a starting material.
  • a high-strength steel sheet having a tensile strength of 440 MPa or more can be used as the metal sheet 14.
  • the metal sheet 14 may be a 590 MPa-class high-strength steel sheet, a 980 MPa-class high-strength steel sheet, or even a 1180 MPa-class high-strength steel sheet.
  • a stainless steel sheet, an aluminum sheet, a copper sheet, etc. may also be used as the metal sheet 14.
  • press working step press working by bending forming is performed on the metal sheet 14 by using the press forming apparatus 10, so as to produce the press formed product 7.
  • the press working step press working by bending forming is performed on the metal sheet 14 by using the press forming apparatus 10, so as to produce the press formed product 7.
  • each of the dies 12 is moved, by the die moving mechanism, obliquely downward toward a respective one of the side surfaces 11b of the punch 11, such that the dies 12 are become close to each other (see the outlined arrows in FIG. 12B ).
  • the working by the punch 11 and the dies 12 is begun, and the region beyond the predetermined height h is formed in the region of each of the vertical wall parts 7c (see FIG. 12C ). That is, the remaining regions are formed by the punch 11 and the dies 12.
  • the flange parts 7d which are connected to the vertical wall parts 7c, are also formed by the punch 11 and the dies 12. In this way, the press formed product 7 is obtained.
  • the region of the shape-changing part 9 and a part of the region of the vertical wall part 7c adjacent to the shape-changing part 9, where a wrinkle is likely to be generated are restrained by the punch 11 and the pad 13 from the early phase of the working. Therefore, at the time of press working, there is no room for a material excess to be generated in the region of the shape-changing part 9 and the region in the vicinity thereof. As a result, even when a high-strength steel sheet is used as the starting material, it is possible to suppress the generation of wrinkles in the region of the shape-changing part 9 and the region in the vicinity thereof. Accordingly, in the case where the press formed product having a relatively complex shape is produced, it is possible to expedite the increasing of the strength, and it is also possible to increase the degree of freedom in designing.
  • the region of each of the vertical wall parts 7c adjacent to the shape-changing part 9 is formed such that, first, the region having the predetermined height h is formed by the pad 13 and the punch 11, and thereafter, the remaining regions are formed by the dies 12 and the punch 11. It is preferable that the predetermined height h is 2 mm or more from the border between the vertical wall part 7c and the ridge line part 7b, and is equal to or less than a half of the total height H (H/2) of the vertical wall part 7c. The reason is as follows.
  • the predetermined height h is less than 2 mm from the border between the vertical wall part 7c and the ridge line part 7b, at the time of the subsequent working by the dies 12 and the punch 11, the working regions of the vertical wall parts 7c become broad, and a wrinkle is likely to be generated.
  • the predetermined height h is more than a half of the total height H of the vertical wall part 7c, at the time of the aforementioned working by the pad 13 and the punch 11, the working regions of the vertical wall parts 7c become broad, and also in this case, a wrinkle is likely to be generated.
  • the lower limit for the predetermined height h is preferably 3 mm, and more preferably 5 mm.
  • the upper limit for the predetermined height h is preferably 40 mm, and more preferably, 20 mm.
  • the press formed product 7 to be produced in the first embodiment is not limited to the first, second and sixth exemplary press formed product 7 having the hat-shaped cross-section shown in FIG. 2 , 3 and 7 . That is, the press formed product 7 may be the third to fifth and seventh exemplary press formed products 7 shown in the above-described FIGS. 4 to 6 and FIG.8 , as long as a part of the ridge line part 7b includes a shape-changing part 9.
  • the shape-changing part 9 of the ridge line part 7b of the press formed product 7 is at least one of (a) to (f) as follows:
  • the pair of ridge line parts of the press formed product does not have to be parallel.
  • a pair of ridge line parts may be crossed at their ends.
  • the cross-section shape of the press formed product may be a channel shape without the flange parts.
  • FIGS. 13A to 13C are diagrams showing the statuses of the press working step by a producing apparatus according to a second embodiment.
  • FIG. 13A shows the state before starting the forming.
  • FIG. 13B shows the state of the early phase of the forming.
  • FIG. 13C shows the state at the completion of the forming.
  • These figures show the cross sections of the region(s) of the shape-changing part(s), as in FIGS. 12A to 12C .
  • a second embodiment is based on the first embodiment, and modifies a part of the first embodiment.
  • the height of the inner side surface 13b of the pad 13 is larger compared to the above-described first embodiment.
  • Each of the dies 12 is arranged adjacent to the either side of the pad 13, and is fixed directly to the upper die holder. That is, no special die moving mechanism is provided. Further, in the case of the second embodiment, the die 12 may be integral without being divided into two.
  • the press working step of the second embodiment first, the working by the punch 11 and the pad 13 is completed with the descending of the upper die holder (see FIG. 13B ). Then, the descending of the upper die holder is subsequently continued. Consequently, each of the dies 12 descends directly, and reaches to the bottom dead point (see the outlined arrows in FIG. 13B ). In this manner, in each of the regions of the vertical wall parts 7c, the region beyond the predetermined height h is formed by the punch 11 and the die 12 (see FIG. 13C ). In this way, the press formed product 7 is obtained.
  • the press working step of the second embodiment it is also possible to reduce the generation of wrinkles in the region of the shape-changing part 9 and the region in the vicinity thereof, as in the above-described first embodiment. Additionally, in the second embodiment, it is unnecessary to provide a special die moving mechanism. Therefore, the apparatus configuration is simple.
  • FIGS. 14A to 14C are diagrams showing the statuses of the press working step by a producing apparatus according to a third embodiment.
  • FIG. 14A shows the state before starting the forming.
  • FIG. 14B shows the state of the early phase of the forming.
  • FIG. 14C shows the state at the completion of the forming.
  • These figures show the cross sections of the region(s) of the shape-changing part(s), as in FIGS. 12A to 12C , and FIGS. 13A to 13C .
  • a third embodiment is based on the second embodiment, and modifies a part of the second embodiment.
  • the substantial working regions of the vertical wall parts 7c by the dies 12 and the punch 11 are front end parts (lower bottom parts) of the vertical wall parts 7c, and are significantly narrow. Therefore, the addition of a restriking step for fine adjusting the shape may be required.
  • the third embodiment improves such a disadvantage (an increase in the steps) of the second embodiment.
  • Each of the dies 12 in the third embodiment is arranged on either outer side of the punch 11.
  • Each of the dies 12 is connected to a lower die holder or bolster via a die moving mechanism such as a cam.
  • Each of the dies 12 may be connected to the upper die holder or slide via the die moving mechanism such as a cam, as in the above-described first embodiment.
  • the die moving mechanism in the third embodiment moves each of the dies 12 horizontally toward a respective one of the side surfaces 11b of the punch 11 (see outlined arrows in FIG. 14B ).
  • the press working step of the third embodiment first, the working by the punch 11 and the pad 13 is completed with the descending of the upper die holder (see FIG. 14B ). Then, the descending of the upper die holder is subsequently continued to the bottom dead point. Consequently, each of the dies 12 is moved, by the die moving mechanism, horizontally toward a respective one of the side surfaces 11b of the punch 11, such that the dies 12 become closer to each other (see the outlines arrows in FIG. 14B ). In this manner, in the region of each of the vertical wall parts 7c, the region beyond the predetermined height h is formed (see FIG. 14C ). In this way, the press formed product 7 is obtained.
  • the press working step of the third embodiment it is also possible to reduce the generation of wrinkles in the region of the shape-changing part 9 and the region in the vicinity thereof, as in the above-described first and second embodiments. Additionally, in the third embodiment, it is possible to suppress the addition of the restriking step, which may occur in the second embodiment, because the substantial working regions of the vertical wall parts 7c by the dies 12 and the punch 11 are broad.
  • the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention as defined by the claims.
  • the press forming apparatus of the above-described embodiments has the structure that includes the punch as the lower die, and includes the die and the pad as the upper die
  • the press forming apparatus of the above-described embodiments may have the structure in which the arrangement of the upper and lower dies is inverted.
  • the restrained region of the top panel part by the punch and the pad may be at least a region adjacent to the shape-changing part of the region of the top panel part.
  • the restrained region of the ridge line part by the punch and the pad may be at least a region of the shape-changing part in the region of each of the ridge line parts.
  • the restrained region of the vertical wall part by the punch and the pad may be at least a region adjacent to the shape-changing part and up to the predetermined height h in each of the vertical wall parts.
  • those regions that are not adjacent to the shape-changing part(s) may be formed by the pad, or may be formed by a separate pad.
  • those regions except for the shape-changing part(s) may be formed by the pad, or may be formed by the dies.
  • those regions that are not adjacent to the shape-changing part(s) may be formed by the pad, or may be formed by the dies.
  • the degree of generation of wrinkles was studied in the case of producing the second exemplary press formed product 7 shown in the above-described FIG. 3 .
  • an FEM analysis was conducted assuming the press working according to the first embodiment shown in the above-described FIGS. 12A to 12C .
  • an FEM analysis was conducted assuming the pad bending forming shown in the above-described FIG. 1 .
  • a DP steel having a 590 MPa-class tensile strength and a sheet thickness of 1.2 mm was used as the starting material.
  • the sheet thickness increase rate was calculated for the shape-changing part, where it was feared that a wrinkle might be generated.
  • the sheet thickness increase rate A is expressed by the following Formula (1).
  • A t 1 ⁇ t 0 / t 0 ⁇ 100 %
  • t0 represents the sheet thickness before the press working
  • t1 represents the sheet thickness after the press working
  • FIG. 15 is a graph showing the study result of the example.
  • the sheet thickness increase rate in the shape-changing part was more than 15%, and the generation of wrinkles was expected.
  • the sheet thickness increase rate in the shape-changing part was suppressed to about 4%, which was the level at which a wrinkle was not generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (8)

  1. Procédé de production d'un produit formé à la presse (7) à partir d'un matériau de départ (14),
    le produit formé à la presse (7) comprenant une partie de panneau supérieure, des parties de paroi verticales s'étendant respectivement depuis les deux extrémités de la partie de panneau supérieure (7a), et des parties d'arête (7b) entre les parties de paroi verticales (7c) et la partie de panneau supérieure (7a), et comportant une partie de forme changeante (9) dans une partie des parties d'arête (7b), qui est située au milieu d'une direction dans le sens de la longueur du produit formé à la presse (7),
    le procédé de production comprenant :
    une étape de préparation consistant à préparer une tôle en tant que matériau de départ (14) ; et
    une étape de travail à la presse consistant à réaliser un travail à la presse sur le matériau de départ (14) par l'utilisation d'un poinçon (11), et d'un patin (13) et d'une matrice (12) qui sont appariés au poinçon (11), et
    l'étape de travail à la presse comportant :
    une première étape consistant à former, par le poinçon (11) et le patin (13), au moins une région adjacente à la partie de forme changeante (9) d'une région de la partie de panneau supérieure (7a), d'au moins une région de la partie de forme changeante (9) d'une région de chacune des parties d'arête (7b), et d'au moins une région adjacente à la partie de forme changeante (9) d'une région de chacune des parties de paroi verticales (7c) et jusqu'à une hauteur prédéterminée depuis une limite entre la partie de paroi verticale (7c) et la partie d'arête (7b) ; et
    une seconde étape consistant à former, à la suite de la première étape, par le poinçon (11) et la matrice (12), les régions restantes, avec le matériau de départ (14) intercalé entre le poinçon (11) et le patin (13).
  2. Procédé de production du produit formé à la presse (7) selon la revendication 1,
    dans lequel la hauteur prédéterminée est de 2 mm ou plus depuis la limite entre la partie de paroi verticale (7c) et la partie d'arête (7b), et est inférieure ou égale à une moitié de la hauteur totale de la partie de paroi verticale (7c).
  3. Procédé de production du produit formé à la presse (7) selon la revendication 1 ou 2,
    dans lequel, dans la première étape, la région entière de la partie de panneau supérieure (7a), la région entière de chacune des parties d'arête (7b), et une région allant jusqu'à la hauteur prédéterminée depuis la limite entre la partie de paroi verticale (7c) et la partie d'arête (7b) d'une région de chacune des parties de paroi verticales (7c) sont formées par le poinçon (11) et le patin (13), et
    dans la seconde étape, une région au-delà de la hauteur prédéterminée de la région de chacune des parties de paroi verticales (7c) est formée par le poinçon (11) et la matrice (12).
  4. Procédé de production du produit formé à la presse (7) selon l'une quelconque des revendications 1 à 3,
    dans lequel la partie de forme changeante (9) des parties d'arête (7b) est au moins l'un des éléments (a) à (f) suivants :
    (a) la hauteur de la partie d'arête (7b) est changée ;
    (b) la longueur d'arc en section transversale de la partie d'arête (7b) est changée ;
    (c) la partie d'arête (7b) est torsadée ;
    (d) la partie d'arête (7b) est fléchie dans une direction de largeur ;
    (e) la partie d'arête (7b) fait saillie ou est creusée dans la direction de largeur ; et
    (f) le rayon de courbure en section transversale de la partie d'arête (7b) est changé.
  5. Appareil de production d'un produit formé à la presse (7) à partir d'un matériau de départ (14),
    l'appareil de production comprenant un poinçon (11), un patin (13) et une matrice (12) qui sont appariés au poinçon,
    le poinçon (11) comportant :
    une surface d'extrémité avant (11a) mise en forme pour former une région d'une partie de panneau supérieure du produit formé à la presse,
    des surfaces latérales (11b) mises en forme pour former des régions de parties de paroi verticales respectives du produit formé à la presse qui s'étendent chacune depuis les deux extrémités de la partie de panneau supérieure du produit formé à la presse,
    des parties d'épaulement de poinçon (11c) prévues entre la surface d'extrémité avant et les surfaces latérales et les parties d'épaulement de poinçon étant mises en forme pour former des régions de parties d'arête respectives du produit formé à la presse qui sont entre les parties de paroi verticales et la partie de panneau supérieure, caractérisé en ce que
    le patin (13) comporte :
    une surface inférieure (13a) mise en forme pour former une région adjacente à une partie de forme changeante d'une région de la partie de panneau supérieure du produit formé à la presse,
    une partie de coin (13c) mise en forme pour former une région de la partie de forme changeante d'une région de chacune des parties d'arête du produit formé à la presse, la partie de forme changeante étant prévue dans une partie des parties d'arête et située au milieu d'une direction dans le sens de la longueur du produit formé à la presse, et
    une surface latérale interne (13b) mise en forme pour former une région adjacente à la partie de forme changeante d'une région de chacune des parties de paroi verticales du produit formé à la presse et jusqu'à une hauteur prédéterminée depuis une limite entre la partie de paroi verticale et la partie d'arête du produit formé à la presse.
  6. Appareil de production du produit formé à la presse selon la revendication 5,
    dans lequel la hauteur prédéterminée est de 2 mm ou plus depuis la limite entre la partie de paroi verticale et la partie d'arête, et est inférieure ou égale à une moitié de la hauteur totale de la partie de paroi verticale.
  7. Appareil de production du produit formé à la presse selon la revendication 5 ou 6,
    dans lequel la surface inférieure (13a) du patin (13) correspond à la région entière de la partie de panneau supérieure, chacune des parties de coin (13c) du patin (13) correspond à la région entière de chacune des parties d'arête, et chacune des surfaces latérales internes (13b) du patin (13) correspond à une région allant jusqu'à la hauteur prédéterminée depuis la limite entre la partie de paroi verticale et la partie d'arête d'une région de chacune des parties de paroi verticales, et
    dans lequel la matrice (12) comporte des surfaces latérales internes (12a) correspondant à des régions au-delà de la hauteur prédéterminée de régions des parties de paroi verticales.
  8. Appareil de production du produit formé à la presse selon la revendication 7,
    dans lequel la matrice (12) est divisée pour correspondre à chacune des parties de paroi verticales, et
    dans lequel l'appareil de production comprend un mécanisme de déplacement de matrice (12) qui déplace chacune des matrices (12) vers l'une respective des surfaces latérales du poinçon après achèvement d'une poussée du matériau de départ dans le patin par le poinçon.
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Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI628013B (zh) * 2015-05-11 2018-07-01 新日鐵住金股份有限公司 壓製成形裝置及壓製成形方法
CN105013917B (zh) * 2015-07-29 2017-07-25 费晓明 金属箱壳体圆弧角接筋的拉伸工艺
CA3011213C (fr) * 2016-01-26 2020-05-12 Nippon Steel & Sumitomo Metal Corporation Appareil de type presse et procede de production pour article moule a la presse
MX2020008953A (es) * 2018-02-28 2020-10-15 Jfe Steel Corp Metodo de produccion para componentes prensados, dispositivo de moldeado por prensado, y lamina de metal para moldeado por prensado.
EP3760332A4 (fr) * 2018-02-28 2021-04-14 JFE Steel Corporation Procédé de production d'éléments pressés, dispositif de moulage à la presse et plaque métallique pour moulage à la presse
KR102356422B1 (ko) * 2018-02-28 2022-02-08 제이에프이 스틸 가부시키가이샤 프레스 부품의 제조 방법, 프레스 성형 장치 및, 프레스 성형용의 금속판
WO2019167791A1 (fr) 2018-02-28 2019-09-06 Ｊｆｅスチール株式会社 Plaque métallique pour moulage à la presse, dispositif de moulage à la presse et procédé de production pour un élément pressé
JP6985989B2 (ja) * 2018-06-26 2021-12-22 株式会社神戸製鋼所 プレス成形品の製造方法
EP3974078A4 (fr) * 2019-05-20 2022-07-13 JFE Steel Corporation Procédé de fabrication d'un composant comprimé et matrice de correction de forme
JP6753502B1 (ja) * 2019-09-30 2020-09-09 Ｊｆｅスチール株式会社 自動車用外板パネルのプレス成形方法及びプレス成形装置
JP6760539B1 (ja) * 2019-10-09 2020-09-23 日本製鉄株式会社 成形品およびそれを用いた構造部材、ならびに成形品の製造方法
JP7421150B2 (ja) * 2020-04-10 2024-01-24 日本製鉄株式会社 プレス成形体の製造方法およびプレス成形体の製造装置
CN118555991A (zh) * 2021-12-28 2024-08-27 日本制铁株式会社 冲压成形装置和冲压成形品的制造方法
CN117444003B (zh) * 2023-11-07 2024-08-09 安徽九纲机电有限公司 一种空心导轨连续自动加工设备及生产线

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339032A (en) * 1941-06-25 1944-01-11 Schlenxig Benhardt Forming die
SU1412867A1 (ru) * 1986-05-11 1988-07-30 Предприятие П/Я Г-4725 Способ изготовлени штампованных изделий
RU2057606C1 (ru) * 1992-10-20 1996-04-10 Челябинский государственный технический университет Способ изготовления профилей
JP3194407B2 (ja) * 1994-06-14 2001-07-30 ダイハツ工業株式会社 板金ワークのプレス方法及びプレス金型装置
JPH0810861A (ja) * 1994-06-30 1996-01-16 Shigenobu Yoshida プレス装置および被加工物のプレス加工法
JP3382729B2 (ja) * 1994-08-25 2003-03-04 国立環境研究所長 自動車のドア構造
JP2002263744A (ja) * 2001-03-06 2002-09-17 Toyota Motor Corp 金属成形品の絞り成形方法および絞り成形用プレス金型
JP2003335266A (ja) * 2002-05-17 2003-11-25 Nissan Motor Co Ltd 車体骨格フレームの補強構造
RU35608U1 (ru) * 2003-09-26 2004-01-27 Федеральное государственное унитарное предприятие "Государственный космический научно-производственный центр им. М.В.Хруничева" Штамп для гибки деталей коробчатого профиля
JP2008189126A (ja) * 2007-02-05 2008-08-21 Kobe Steel Ltd 構造用部材
BRPI0805842A2 (pt) * 2007-10-17 2011-08-30 Toyota Motor Co Ltd artigo moldado para membro estrutural do corpo de veìculo
JP5020858B2 (ja) * 2008-02-27 2012-09-05 新日本製鐵株式会社 部材長手方向の平面内に屈曲部を有する金属製断面ハット型形状部材およびそのプレス成形方法
JP2009248585A (ja) * 2008-04-01 2009-10-29 Toyota Motor Corp 車体補強構造
JP5217928B2 (ja) * 2008-11-12 2013-06-19 新日鐵住金株式会社 プレス加工方法及びプレス成形体
JP5416498B2 (ja) * 2009-07-23 2014-02-12 本田技研工業株式会社 テーラードブランク板の成形方法及びその装置
JP5422454B2 (ja) * 2010-03-23 2014-02-19 本田技研工業株式会社 車体側部構造
JP5610898B2 (ja) * 2010-07-27 2014-10-22 ユニプレス株式会社 プレス成形用金型装置並びにプレス成形方法
JP5836972B2 (ja) * 2010-11-24 2015-12-24 新日鐵住金株式会社 Ｌ形製品の製造方法
EP2711104B1 (fr) * 2011-05-20 2023-01-11 Nippon Steel Corporation Procédé de formage par presse
JP2013000780A (ja) * 2011-06-17 2013-01-07 Honda Motor Co Ltd プレス成形装置
EP2796221B1 (fr) * 2011-12-22 2022-12-21 Nippon Steel Corporation Produit embouti
US9839951B2 (en) * 2012-06-22 2017-12-12 Nippon Steel & Sumitomo Metal Corporation Manufacturing method and manufacturing apparatus of press-formed body
JP5673636B2 (ja) * 2012-09-26 2015-02-18 Ｊｆｅスチール株式会社 パネル部品評価方法、パネル部品評価装置および自動車用パネル部品の製造方法
EP3037187B1 (fr) * 2013-10-09 2020-11-04 Nippon Steel Corporation Procédé de production pour un corps moulé à la presse et dispositif de moulage à la presse
JP3194407U (ja) * 2014-09-09 2014-11-20 由彦 上満 レーザー墨出し器用エレベーターマグネット基台
KR101958584B1 (ko) * 2014-10-01 2019-03-14 신닛테츠스미킨 카부시키카이샤 프레스 성형품의 제조 방법, 제조 장치 및 제조 설비열

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US20170333972A1 (en) 2017-11-23
RU2017120293A (ru) 2018-12-14
KR20170080681A (ko) 2017-07-10
EP3219403A4 (fr) 2018-10-31
BR112017008611A2 (pt) 2017-12-26
MX2017005944A (es) 2017-06-30
CA2966971A1 (fr) 2016-05-19
RU2675416C2 (ru) 2018-12-19
WO2016075937A1 (fr) 2016-05-19
EP3219403A1 (fr) 2017-09-20
JPWO2016075937A1 (ja) 2017-07-13
CN107148320A (zh) 2017-09-08

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