Search

EP-4079485-B1 - SHAPING METHOD, AND SYSTEM

EP4079485B1EP 4079485 B1EP4079485 B1EP 4079485B1EP-4079485-B1

Inventors

  • KITAZAWA, TOSHIKI
  • SHIMIZU, MASAHIKO

Dates

Publication Date
20260506
Application Date
20200629

Claims (6)

  1. A forming method of forming a laminate (200) that is obtained by laminating a plurality of sheet-shaped materials including reinforcing fibers, the forming method comprising: a fixation step (S101) of fixing a first region (200a) of the laminate (200) in a longitudinal direction to a forming die (10) that includes a curved portion (13) having at least one of a concave shape and a convex shape along a predetermined direction; a forming step (S103) of forming the laminate (200) along a surface shape of the forming die (10) by pressing a second region (200b) of the laminate (200), of which the first region (200a) is fixed in the fixation step (S101), in the longitudinal direction against the forming die (10) by means of a forming jig (20); an installation step (S104) of installing a holding jig (30) on the curved portion (13) in a state where the forming jig (20) presses the laminate (200) against the forming die (10), the holding jig (30) maintaining a state where the laminate (200) is pressed against the curved portion (13); a disposition step (S102) of disposing the forming jig (20) having a rod-like shape extending in a width direction of the laminate (200) so as to come into contact with the first region (200a) of the laminate (200) fixed in the fixation step (S101), wherein in the installation step (S104), the holding jig (30) is installed on the curved portion (13) over which the forming jig (20) has passed; characterized in that in the forming step (S103), the forming jig (20) is moved from the first region (200a) to the second region (200b) of the laminate (200) along the predetermined direction in a state where the forming jig (20) disposed in the disposition step (102) presses the laminate (200) against the forming die (10).
  2. The forming method according to Claim 1, wherein the holding jig (30) has a shape corresponding to the curved portion (13) of the forming die (10), and in the installation step (S104), the holding jig (30) is moved from a position separated from the forming die (10) to a position close to the forming die (10) so that the holding jig (30) is installed on the curved portion (13).
  3. The forming method according to Claim 1, wherein the curved portion (13) is formed in a convex shape along the predetermined direction, the holding jig (30) is formed in a sheet-like shape of which one end is wound around a roller (31B) and the other end is attached to the forming jig (20), and in the installation step (S104), as the forming jig (20) moves from the first region (200a) to the second region (200b) of the laminate (200), the holding jig (30) is unwound from the roller (31B) in a state where a tension for pressing the laminate (200) against the curved portion (13) is applied so that the holding jig (30) is installed on the curved portion (13).
  4. The forming method according to Claim 1, wherein the holding jig (30) is formed in a sheet-like shape of which one end is fixed to the forming die (10) and the other end is wound around the forming jig (20), and in the installation step (S104), as the forming jig (20) moves from the first region (200a) to the second region (200b) of the laminate (200), the holding jig (30) wound around the forming jig (20) is unwound so that the holding jig (30) is installed on the curved portion (13).
  5. The forming method according to Claim 1, wherein the holding jig (30) is formed in a rod-like shape extending in the width direction of the laminate (200), and in the installation step (S104), as the forming jig (20) moves from the first region (200a) to the second region (200b) of the laminate (200), a plurality of the holding jigs (31, 32, 33) are moved along the longitudinal direction of the laminate (200) in a state where the laminate (200) is pressed against the forming die (10) so that the holding jigs (31, 32, 33) are installed on the curved portion (13).
  6. A system comprising a forming device (100) for forming a laminate (200) that is obtained by laminating a plurality of sheet-shaped materials including reinforcing fibers and the laminate, the forming device (100) comprising: a forming die (10) that includes a curved portion (13, 16) having at least one of a concave shape and a convex shape along a predetermined direction and to which a first region (200a) of the laminate (200) in a longitudinal direction is fixed; a forming jig (20) that is configured to form the laminate (200) along a surface shape of the forming die (10) by pressing a second region (200b) of the laminate (200), of which the first region (200a) is fixed to the forming die (10), in the longitudinal direction against the forming die (10), the forming jig (20) having a rod-like shape extending in a width direction of the laminate (200); a holding jig (30) that is configured to maintain a state where the laminate (200) is pressed against the curved portion (13, 16); a forming mechanism; and an installation mechanism (40) that is configured to install the holding jig (30) on the curved portion (13, 16) in a state where the forming jig (20) presses the laminate against the forming die; characterized in that the forming mechanism is configured to move the forming jig (20) from the first region (200a) to the second region (200b) of the laminate (200) along the predetermined direction in a state where the forming jig (20) presses the laminate (200) against the forming die (10).

Description

Technical Field The present disclosure relates to a forming method of forming a laminate obtained by laminating a plurality of sheet-shaped materials including reinforcing fibers and to a system. Background Art A composite structural member of an aircraft has a certain cross-sectional shape, and as a method of manufacturing the composite structural member, there is known a method of pressing a laminate that is obtained by laminating a plurality of sheet-shaped materials including reinforcing fibers against a forming die so as to form the laminate into a target shape (for example, refer to US 2017/0021534 A1 and US 8 556 618 B2). Disclosed in US 2017/0021534 A1 is a technique in which forming a ply installed on a mandrel by pressing the ply against a forming surface of the mandrel by means of a bladder is repeated to form a composite material in which a plurality of plies are laminated on each other. Disclosed in PTL 2 is a technique in which a plate-shaped material installed on an upper surface of a forming tool is pressed against a side surface and a flange surface of the forming tool by means of a bladder so that the plate-shaped material is formed. WO 2020/121648 A1 discloses a forming method for forming a laminate and a related forming device with the pre-characterizing features of claim 1 and claim 6. Summary of Invention Technical Problem However, in the case of US 2017/0021534 A1, the bladder is withdrawn after the ply is pressed against the forming surface of the mandrel. Therefore, a portion of the ply from which the bladder is withdrawn may be separated from the forming surface and may be deformed into a shape different from the surface shape of the mandrel. Similarly, in the case of US 8 556 618 B2, the bladder is withdrawn after the plate-shaped material is pressed against a forming surface of the forming tool and the plate-shaped material is cured thereafter. Therefore, a portion of the plate-shaped material from which the bladder is withdrawn may be separated from the forming surface and may be deformed into a shape different from the surface shape of the forming tool. Particularly, in a case where a concave portion is formed between a side surface and a flange surface as in the case of the forming tool of US 8 556 618 B2, it is difficult to make a bladder fit in with the shape of the concave portion and to appropriately press a plate-shaped member and thus there is a probability that the plate-shaped member cannot be appropriately formed along the shape of the concave portion. The present disclosure has been made in view of such circumstances and an object thereof is to provide a forming method and a forming device with which it is possible to reliably maintain a state where a laminate obtained by laminating a plurality of sheet-shaped materials including reinforcing fibers is formed along the surface shape of a forming die. Solution to Problem This object is solved by a forming method with the features of claim 1 and a system with the features of claim 6. Preferred embodiments follow from the other claims. According to an aspect of the present disclosure, there is provided a forming method of forming a laminate that is obtained by laminating a plurality of sheet-shaped materials including reinforcing fibers, the forming method including: a fixation step of fixing a first region of the laminate in a longitudinal direction to a forming die that includes a curved portion having at least one of a concave shape and a convex shape along a predetermined direction; a forming step of forming the laminate along a surface shape of the forming die by pressing a second region of the laminate, of which the first region is fixed in the fixation step, in the longitudinal direction against the forming die by means of a forming jig; and an installation step of installing a holding jig on the curved portion in a state where the forming jig presses the laminate against the forming die, the holding jig maintaining a state where the laminate is pressed against the curved portion. According to an aspect of the present disclosure, there is provided a system comprising a forming device forming a laminate that is obtained by laminating a plurality of sheet-shaped materials including reinforcing fibers and the laminate, the forming device including: a forming die that includes a curved portion having at least one of a concave shape and a convex shape along a predetermined direction and to which a first region of the laminate in a longitudinal direction is fixed; a forming jig that forms the laminate along a surface shape of the forming die by pressing a second region of the laminate, of which the first region is fixed to the forming die, in the longitudinal direction against the forming die; a holding jig that maintains a state where the laminate is pressed against the curved portion; and an installation mechanism that installs the holding jig on the curved portion in a state where the forming jig presses the laminate