JP2017094341A - Method for manufacturing press-molded product and press-molding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a press-molded product which enables formation of a thick part of a desired shape while reducing a press force amount.SOLUTION: A method for manufacturing a press-molded product comprises: a process of locating a pressed member on a press-molding device 1; and a process of pressing a flat plate part 10 of the pressed member by causing a first press part 11A and a second press part 12A to approach each other. A first opposite surface 11B and a second opposite surface 12B are brought into contact with the flat plate part 10 during pressing and face each other. In the pressing process, a part of material of the flat plate part 10 in a press direction is made to flow into a thickening formation part 15 formed on the first opposite surface 11B, thereby forming a thick portion on the flat plate part 10. The second opposite surface 12B is moved in the press direction in association with pressing of the flat plate part 10 by the first press part 11A and the second press part 12A.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for manufacturing a press-formed product and a press-forming apparatus.

  2. Description of the Related Art Conventionally, a technique for manufacturing a metal plate used for a frame part of a vehicle such as an automobile by press molding is known. In such an application, there is an increasing demand not only for a metal plate having a constant plate thickness but also for a metal plate provided with a plate thickness difference by partially forming a thickened portion. Patent Documents 1 to 3 below disclose apparatuses and methods for manufacturing a metal plate having such a thickened portion by press molding.

  In the press forming apparatus disclosed in Patent Documents 1 and 2 below, both main surfaces of the metal plate are sandwiched between a pair of upper and lower molds, and in this state, the metal plate is pressed in a direction parallel to the main surface. Thereby, the material of a metal plate flows toward the recessed part provided in a part of clamping surface of a metal mold | die, and a thickened part is formed. In Patent Document 3 below, an extension is provided in a part of the longitudinal direction in a U-shaped metal plate, and a thickened part is formed in a part of the longitudinal direction by pressing the extension. .

JP 2014-166645 A JP 2007-14978 A JP 2008-296252 A

  In the press forming apparatus disclosed in Patent Documents 1 and 2, both main surfaces of the metal plate are sandwiched between a pair of upper and lower molds, and the metal plate is in a direction parallel to the main surface in a state where the position of the mold is fixed. To press. In this case, the frictional force generated due to the sliding between the mold and the metal plate increases, and the necessary pressing force becomes excessive. On the other hand, in the press molding apparatus disclosed in Patent Document 3, the gap between the mold and the metal plate is large, and folding may occur in the metal plate during pressing. When the folding occurs in this way, the flow direction of the metal plate material cannot be controlled, and it becomes difficult to form a thickened portion having a desired shape.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for manufacturing a press-formed product and a press-forming device that can form a thickened portion having a desired shape while reducing the amount of pressing force. It is to be.

  (1) A method for manufacturing a press-formed product according to one aspect of the present invention is a method for manufacturing a press-formed product by forming a pressed member including a flat plate portion. In this method, the first main surface of the flat plate portion faces the first facing surface, and the second main surface, which is the main surface facing the first main surface of the flat plate portion, faces the second facing surface. As described above, the step of installing the member to be pressed in the press molding apparatus, the first press portion facing the first end portion of the flat plate portion, and the end of the flat plate portion opposite to the first end portion Pressing the flat plate portion by bringing the second press portion facing the second end portion, which is a portion, close to each other. The first opposing surface and the second opposing surface are in contact with the flat plate portion during pressing and are opposed to each other. In the pressing step, a thickness of the flat plate portion is made to flow by flowing a part of the material of the flat plate portion in the pressing direction into a thickening forming portion formed on at least one of the first facing surface and the second facing surface. A meat portion is formed, and at least one of the first facing surface and the second facing surface moves in the pressing direction as the flat plate portion is pressed by the first pressing portion and the second pressing portion.

  In the above method, as the first press portion and the second press portion are brought close to each other and the flat plate portion is pressed, the facing surface that faces the main surface of the flat plate portion moves in the direction of the press. For this reason, the frictional force generated by sliding between the main surface of the flat plate portion and the facing surface is further reduced as compared with the case of pressing in a state where the facing surface is fixed without moving as in the prior art. Can do. As a result, the required pressing force can be further reduced.

  In the above method, the flat plate portion is pressed by the first press portion and the second press portion, and a portion of the material of the flat plate portion in the pressing direction is caused to flow into the thickening forming portion, whereby the flat plate portion is thickened. A thickened part which is a part can be formed. Here, since the first facing surface and the second facing surface are in contact with the flat plate portion during the pressing and are opposed to each other, it is possible to prevent the flat plate portion from being folded during the pressing, and the flow direction of the material Can be prevented from becoming non-uniform. For this reason, the material of a flat plate part can be reliably flowed into the thickening formation part, and the thickening part of desired shape can be formed.

  Here, the “first end portion and the second end portion” are end portions on both sides in the pressing direction of the flat plate portion.

  (2) In the method of manufacturing a press-formed product, in the step of installing the pressed member, a mold provided with the first press portion and the first facing surface, the second press portion, and the first You may install the said flat plate part between the metal mold | die provided with 2 opposing surfaces.

  Thereby, compared with the case where the 1st press part and the 1st counter surface are provided in a separate member, and using the press molding device in which the 2nd press part and the 2nd counter surface were provided in a separate member, The apparatus structure can be further simplified.

  (3) In the method for manufacturing a press-molded product, the mold having the first facing surface includes a first divided portion and a second divided portion formed separately from the first divided portion. You may do it. The first press part may be formed in the first divided part. The second press part may be formed in the second divided part. In the step of pressing, the first divided portion moves in the pressing direction of the first press portion along with the pressing of the flat plate portion by the first press portion, and the flat plate portion by the second press portion With the pressing, the second divided portion may move in the pressing direction of the second pressing portion.

  Thereby, the 1st and 2nd edge part of a flat plate part can be pressed by the 1st and 2nd press part by making a 1st division part and a 2nd division part approach mutually, respectively. Therefore, the first facing surface can be moved in each pressing direction by the first and second pressing portions, and the frictional force generated between the main surface of the flat plate portion and the facing surface can be more effectively reduced. it can. As a result, the pressing force can be further reduced.

  (4) In the method for manufacturing a press-formed product, the first divided portion and the second divided portion may each have a comb tooth shape that meshes with each other. In the pressing step, the first divided portion and the second divided portion may approach each other so that the comb teeth mesh with each other.

  Thereby, it can press-mold in the state which supported the flat plate part more stably.

  (5) In the method of manufacturing a press-formed product, in the step of installing the pressed member, the pressed member is installed so that the first main surface and the second main surface of the flat plate portion are along a vertical direction. May be.

  Thereby, compared with the case where it arrange | positions so that a 1st main surface and a 2nd main surface may follow a horizontal direction, the installation area of a press molding apparatus can be made small and space saving can be achieved.

  (6) In the method for manufacturing a press-formed product, in the step of installing the pressed member, the first main surface and the second main surface are along a vertical direction by supporting the flat plate portion by a temporary pressing member. You may maintain the state.

  Thereby, even when it is set as a vertical arrangement so that the first main surface and the second main surface of the flat plate portion are along the vertical direction, the flat plate portion can be stably supported so as not to fall down.

  (7) In the method for manufacturing a press-formed product, in the pressing step, pressure may be applied to the material of the flat plate portion that has flowed into the thickening forming portion.

  Thereby, in the process of flowing the material of the flat plate portion into the thickening forming portion to form the thick portion, it is possible to more effectively prevent the folding in the flat plate portion.

  (8) In the method for manufacturing a press-formed product, the pressed member may be formed by hot pressing.

  In the above method, since the flat plate portion can be pressed in a state where no folding occurs as described above, the flow direction of the material can be more reliably controlled even in the case of hot pressing.

  (9) A press molding apparatus according to another aspect of the present invention is a press molding apparatus for molding a pressed member including a flat plate portion. The press molding apparatus includes a first press portion facing the first end portion of the flat plate portion and a second end portion facing the second end portion of the flat plate portion opposite to the first end portion. A pressing portion, a first opposing surface that opposes the first main surface of the flat plate portion, and a second opposing surface that opposes a second main surface that is the main surface facing the first main surface of the flat plate portion. And a drive unit that brings the first press unit and the second press unit closer to each other so as to press the flat plate unit. A thickening portion for forming a thick portion on the flat plate portion is formed on at least one of the first facing surface and the second facing surface. The first opposing surface and the second opposing surface are in contact with the flat plate portion during pressing and are opposed to each other. The thickening portion is configured such that a part of the material of the flat plate portion in the pressing direction flows by pressing the flat plate portion with the first press portion and the second press portion. At least one of the first facing surface and the second facing surface is configured to move in the pressing direction as the flat plate portion is pressed by the first press portion and the second press portion.

  In the press molding apparatus, as the first press portion and the second press portion are brought close to each other and the flat plate portion is pressed, the facing surface facing the main surface of the flat plate portion can be moved in the direction of the press. . For this reason, it is possible to further reduce the frictional force generated by sliding between the main surface of the flat plate portion and the facing surface, compared to the case of pressing in a state where the facing surface is fixed without moving as in the prior art. it can. As a result, the required pressing force can be further reduced.

  In the press molding apparatus, the flat plate portion is pressed by the first press portion and the second press portion, and a part of the material of the flat plate portion in the pressing direction is caused to flow into the thickening forming portion, thereby increasing the thickness of the flat plate portion. A thickened part, which is a meat part, can be formed. Here, since the first facing surface and the second facing surface are in contact with the flat plate portion during the pressing and are opposed to each other, it is possible to prevent the flat plate portion from being folded during the pressing, and the flow direction of the material Can be prevented from becoming non-uniform. For this reason, the material of a flat plate part can be reliably made to flow into the thickening formation part, and the thickening part of a desired shape can be formed.

  (10) In the press molding apparatus, the first press portion and the first facing surface may be provided in the same mold. The second press part and the second facing surface may be provided in the same mold.

  Thereby, compared with the case where the 1st press part and the 1st counter surface are provided in a separate member, and the 2nd press part and the 2nd counter surface are provided in a separate member, the structure of a press molding device is simpler. Can be

  (11) In the press molding apparatus, the mold having the first facing surface includes a first divided portion and a second divided portion formed separately from the first divided portion. Also good. The first press part may be formed in the first divided part. The second press part may be formed in the second divided part.

  Thereby, the 1st and 2nd edge part of a flat plate part can be pressed by the 1st and 2nd press part by making a 1st division part and a 2nd division part approach mutually, respectively. Therefore, the first facing surface can be moved in each pressing direction by the first and second pressing portions, and the frictional force generated between the main surface of the flat plate portion and the facing surface can be more effectively reduced. it can. As a result, the pressing force can be further reduced.

  (12) In the press molding apparatus, the first divided portion and the second divided portion may each have a comb-tooth shape that meshes with each other.

  Thereby, it can press-mold in the state which supported the flat plate part more stably.

  (13) In the press molding apparatus, the first facing surface and the second facing surface may be arranged along a vertical direction.

  Thereby, compared with the case where it arrange | positions so that a 1st and 2nd opposing surface may follow a horizontal direction, the installation area of a press molding apparatus can be made small and space saving can be achieved.

  (14) The press molding apparatus may include a temporary pressing member that supports the flat plate portion so that the first main surface and the second main surface are maintained in a state along the vertical direction.

  Accordingly, even when the first main surface and the second main surface are arranged vertically so that the vertical direction is along the vertical direction, the flat plate portion can be stably supported so as not to fall down.

  (15) The press molding apparatus may include a back pressure applying portion that applies pressure to the material of the flat plate portion that has flowed into the thickening forming portion.

  Thereby, in the process of flowing the material of the flat plate portion into the thickening forming portion to form the thick portion, it is possible to more effectively prevent the folding in the flat plate portion.

  (16) In the press molding apparatus, the pressed member may be molded by hot pressing.

  In the press molding apparatus, since the flat plate portion can be pressed in a state where no folding occurs as described above, the flow direction of the material can be more reliably controlled even in the case of hot pressing.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method and press molding apparatus of a press-molded product which enable formation of the thick part of a desired shape can be provided, reducing press force.

It is a figure which shows typically the structure of the press molding apparatus which concerns on Embodiment 1 of this invention. It is an enlarged view of the thickness forming part vicinity in the said press molding apparatus. It is a flowchart which shows the procedure of the manufacturing method of the press-formed product which concerns on Embodiment 1 of this invention. It is a figure which shows a mode that a to-be-pressed member is heated in an electric furnace. It is a figure which shows a mode that a flat plate part is pressed and a thickened part is formed. It is a schematic diagram which shows a press-formed product. It is a graph which shows the measurement result of a forming load and a pressing load. It is a figure which shows typically the structure of the press molding apparatus which concerns on the modification 1 of the said Embodiment 1. FIG. It is a figure which shows a mode that a flat plate part is pressed in the said modification 1, and a thickened part is formed. It is a figure which shows typically the structure of the press molding apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows a mode that a flat plate part is pressed in the said Embodiment 2. FIG. It is a figure which shows a mode that a flat plate part is pressed in the said Embodiment 2, and a thickened part is formed. It is a figure which shows typically the structure of the press molding apparatus which concerns on the modification 1 of the said Embodiment 2. FIG. It is a figure which shows typically the structure of the press molding apparatus which concerns on the modification 1 of the said Embodiment 2. FIG. It is a figure which shows typically the structure of the press molding apparatus which concerns on the modification 2 of the said Embodiment 2. FIG. It is a figure which shows a mode that a flat plate part is pressed in the modification 2 of the said Embodiment 2, and a thickened part is formed. It is a figure which shows typically the structure of the press molding apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows a mode that the flat plate part has been arrange | positioned between metal mold | die in the said Embodiment 3. FIG. It is a figure which shows a mode that a flat plate part is pressed in the said Embodiment 3, and a thickened part is formed. It is a figure which shows typically the structure of the press molding apparatus which concerns on the modification 1 of the said Embodiment 3. FIG. It is a figure which shows a mode that the flat plate part has been arrange | positioned between metal mold | die in the modification 1 of the said Embodiment 3. FIG. It is a figure which shows a mode that a flat plate part is pressed in the modification 1 of the said Embodiment 3, and a thickened part is formed. It is a figure which shows typically the structure of the press molding apparatus which concerns on the modification 2 of the said Embodiment 3. FIG. It is a figure which shows a mode that a flat plate part is pressed in the modification 2 of the said Embodiment 3, and a thickened part is formed. It is a figure which shows typically the structure of the press molding apparatus which concerns on the modification 3 of the said Embodiment 3. FIG. It is a figure which shows a mode that a flat plate part is pressed in the modification 3 of the said Embodiment 3, and a thickened part is formed. It is a figure which shows typically the structure of the press molding apparatus which concerns on the modification 4 of the said Embodiment 3. FIG. It is a figure which shows a mode that a flat plate part is pressed in the modification 4 of the said Embodiment 3, and a thickened part is formed. It is a figure which shows the structure of the division part in the other modification of the said Embodiment 3. FIG. It is a figure which shows typically the structure of the press molding apparatus which concerns on Embodiment 4 of this invention. It is a figure which shows a mode that a flat plate part is pressed in the said Embodiment 4. FIG. It is a figure which shows a mode that a flat plate part is pressed in the said Embodiment 4, and a thickened part is formed. It is a figure which shows typically the structure of the press molding apparatus which concerns on the modification 1 of the said Embodiment 4. FIG. It is a figure which shows a mode that a flat plate part is pressed in the modification 1 of the said Embodiment 4. FIG. It is a figure which shows a mode that a flat plate part is pressed in the modification 1 of the said Embodiment 4, and a thickened part is formed. It is a figure which shows typically the structure of the press molding apparatus which concerns on other embodiment of this invention. It is a schematic diagram for explaining partial energization heating. It is the schematic for demonstrating the press molding of the flat plate part heated by partial electricity supply.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
[Configuration of press molding equipment]
First, the configuration of the press molding apparatus 1 according to Embodiment 1 of the present invention will be described with reference mainly to FIG.

  The press forming apparatus 1 is an apparatus that performs press forming so that a thick portion (thickened portion) is partially formed in a pressed member including a flat plate portion 10 such as a metal plate having a constant plate thickness. The press molding apparatus 1 includes a first mold 11, a second mold 12, a support member 13, a pressing member 18, and a drive unit 18B.

  The member to be pressed is a metal plate made of a material such as hard steel, mild steel, or aluminum, and the whole is configured as a flat plate portion 10 in the illustrated example.

  In addition, the to-be-pressed member of this invention does not need to be the flat plate part 10 as a whole, and may have the flat plate part 10 in part. The flat plate portion 10 includes a first main surface 10C, a second main surface 10D that is a main surface facing the first main surface 10C, a first end portion 10A, and the first end portion 10A opposite to the first main surface 10C. A second end portion 10B which is an end portion of the first end portion 10B.

  The first mold 11 is fixed on the mounting surface 13A of the support member 13 by a fixing member such as a bolt B. The first mold 11 includes a facing portion 11C that faces the flat plate portion 10 and a guide portion 11D that is disposed at a distance from the facing portion 11C and guides the movement of the second mold 12.

  The facing portion 11C is provided with a first facing surface 11B facing the first main surface 10C and a first press portion 11A facing the first end portion 10A. As described above, the first press part 11 </ b> A and the first facing surface 11 </ b> B are provided in the same first mold 11. The 1st opposing surface 11B is arrange | positioned in the vertical state so that the upper end may be connected to the upper surface 11F, and may follow a perpendicular direction (it is parallel to a perpendicular direction). The first press portion 11A is connected to the lower end of the first facing surface 11B and is provided as a flat surface along the horizontal direction (parallel to the horizontal direction).

  In the vicinity of the center of the first facing surface 11B, a groove-shaped thickening forming portion 15 is formed. The thickening portion 15 is provided to form a thickened portion, which is a thick portion, in the flat plate portion 10 by flowing a part of the material of the flat plate portion 10 in the pressing direction during press molding. Yes. The thickening forming portion 15 is a portion surrounded by a pair of side wall surfaces formed of a horizontal plane extending in the horizontal direction and a bottom wall surface connecting end portions on the back side of the pair of side wall surfaces. Dent in the direction away from. The thickening forming portion 15 is formed in a part in the pressing direction on the first facing surface 11B.

  In addition, the shape of the thickening formation part 15 is not limited to this, According to the shape of the thickening part formed in the flat plate part 10, it can change suitably. For example, a semicircular cross section or a triangular shape may be used. In addition, a plurality of thickening portions 15 may be formed on the first facing surface 11B. Further, the portion where the thickening forming portion 15 is formed is not limited to the central portion.

  A plurality of guide rollers 17 are arranged on the inner surface of the guide portion 11D. The lower end portion of the second mold 12 is located between the guide portion 11D and the facing portion 11C, and the second mold 12 moves in the vertical direction as the spring 16 contracts. At this time, when the guide roller 17 contacts the side surface, the vertical movement of the second mold 12 is guided.

  The second mold 12 has a lower surface connected to the upper end of the spring 16 and a lower end portion located between the facing portion 11C and the guide portion 11D. In a state before the start of press molding (FIG. 1), the upper surface 12C of the second mold 12 is positioned above the upper surface 11F of the first mold 11.

  The second mold 12 is provided with a second facing surface 12B facing the second main surface 10D and a second press portion 12A facing the second end portion 10B. Thus, the second press part 12A and the second facing surface 12B are provided in the same second mold 12. The second facing surface 12B has an upper end connected to the second press portion 12A, and is arranged in a vertical state so as to be along the vertical direction (so as to be parallel to the vertical direction). The second press portion 12A is provided as a flat surface along the horizontal direction (parallel to the horizontal direction).

  In the second mold 12, the second opposing surface 12B faces the first opposing surface 11B in the horizontal direction with the flat plate portion 10 interposed therebetween, and the second press portion 12A has the first press portion with the flat plate portion 10 interposed therebetween. It is arranged so as to face 11A in the vertical direction. Thereby, the flat plate part 10 can be disposed between the first mold 11 and the second mold 12.

  FIG. 2 shows the thickness T1 of the flat plate part 10, the distance D1 between the first and second opposing surfaces 11B and 12B, and the distance D2 between the bottom wall surface 15A of the thickening forming part 15 and the second opposing surface 12B. Yes. In the press molding apparatus 1, the interval D1 is adjusted according to the thickness T1 so that the ratio of the interval D1 (mm) / thickness T1 (mm) is 1.1 or less. For example, when pressing the flat plate portion 10 having a thickness T1 of 1.4 mm, the interval D1 is adjusted to 1.6 mm. The interval D2 is adjusted to 2.2 mm.

  As shown in FIG. 2, before the press is started (that is, before the flat plate portion 10 is pressed by the first and second press portions 11A and 12A), the flat plate portion 10, the first facing surface 11B, and the second facing surface 12B. A gap may be formed between the two. This gap is such that no folding occurs during pressing. In other words, the first facing surface 11B and the second facing surface 12B are opposed to each other with a gap D1 at which the folding of the flat plate portion 10 does not occur during pressing. Here, the “folding of the flat plate portion 10” means that the flat plate portion 10 bends to such an extent that the flow of the material of the flat plate portion 10 by the press is hindered. Excludes materials that do not affect the flow of materials.

  In the course of pressing, the first facing surface 11B and the second facing surface 12B are in contact with the flat plate portion 10 and face each other. However, the flat plate portion 10 does not always need to be in contact with the first opposed surface 11B or the second opposed surface 12B in the course of pressing, and the entire flat plate portion 10 is the first opposed surface 11B or the second opposed surface. There is no need to contact 12B.

  As shown in FIG. 1, the support member 13 is a metal member having a rectangular parallelepiped shape, and has a flat placement surface 13 </ b> A on which the lower surface of the first mold 11 is placed. The support member 13 is disposed with the placement surface 13 </ b> A placed horizontally along the horizontal direction, and is fixed to the first mold 11 by a fixing member such as a bolt B.

  The pressing member 18 is a member for moving the second mold 12 downward in the vertical direction by pressing the upper surface 12C of the second mold 12. The pressing member 18 has a pressing surface 18A and moves downward in the vertical direction by operating the driving unit 18B. The second mold 12 can be moved downward in the vertical direction by pressing the upper surface 12C with the pressing surface 18A.

  The drive unit 18B is disposed in contact with the upper surface 18C of the pressing member 18. The drive unit 18B has, for example, a hydraulic or electric piston, and moves the pressing member 18 downward in the vertical direction by pressing the upper surface 18C.

  In the press molding apparatus 1, first, the driving surface 18 </ b> B is moved to lower the pressing member 18, whereby the pressing surface 18 </ b> A comes into contact with the upper surface 12 </ b> C of the second mold 12. In this state, when the pressing member 18 is further lowered, the second mold 12 moves downward in the vertical direction, whereby the second press portion 12A approaches the first press portion 11A. And the flat plate part 10 is pressed by the 1st press part 11A and the 2nd press part 12A in the direction parallel to the main surfaces 10C and 10D from the both end parts 10A and 10B side (FIG. 5). Thereby, a part of material of the flat plate part 10 in a press direction flows into the thickening formation part 15, and a thickening part is formed.

  Here, in the said press molding apparatus 1, the 2nd opposing surface 12B moves to the direction of a press with the press by 1st and 2nd press part 11A, 12A. That is, the second facing surface 12B slides in the same direction as the pressing direction of the flat plate portion 10. For this reason, the frictional force resulting from sliding between 2nd main surface 10D and 2nd opposing surface 12B is reduced, and the amount of press force required for shaping | molding of the flat plate part 10 is reduced.

[Press-molded product manufacturing method]
Next, a method for manufacturing a press-formed product according to the present embodiment using the press-forming apparatus 1 will be described with reference to a flowchart shown in FIG. First, step S10 for preparing a member to be pressed is performed. In this step S10, a pressed member including the flat plate portion 10, such as a metal plate having a constant plate thickness, is prepared and heated at a predetermined temperature in the electric furnace F (FIG. 4). Thereby, the whole flat plate part 10 will be in the softened state. In the present embodiment, a press-formed product is manufactured by a hot press that is molded in such a state that the entire flat plate portion 10 is softened by heating. In addition, this invention is not limited in the case of hot press, and in the case of cold work, the said step S10 may be omitted.

  Next, process S20 which installs a member to be pressed is carried out. In this step S20, the flat plate portion 10 softened in the above step S10 is installed between the first mold 11 and the second mold 12 (FIG. 1). More specifically, the first major surface 10C faces the first facing surface 11B along the vertical direction, and the second major surface 10D faces the second facing surface 12B along the vertical direction. Thus, the flat plate portion 10 is installed. Here, the 1st opposing surface 11B and the 2nd opposing surface 12B contact the flat plate part 10 in the middle of a press, and are mutually opposing so that a folding may not generate | occur | produce in the flat plate part 10 in below-mentioned press process S30.

  Next, step S30 for pressing the member to be pressed is performed. In this step S30, first, the driving member 18B is operated to lower the pressing member 18, and the pressing surface 18A is brought into contact with the upper surface 12C of the second mold 12. Then, by further lowering the pressing member 18 and pressing the upper surface 12C of the second mold 12, the second mold 12 is lowered and the second press part 12A approaches the first press part 11A. Thereby, the flat plate part 10 is pressed by the 1st press part 11A and the 2nd press part 12A in the direction parallel to main surface 10C, 10D from the both-ends part 10A, 10B side. A part of the material of the flat plate portion 10 in the pressing direction flows into the thickening portion 15 (arrow in FIG. 5), and a thickened portion that is a thick portion is formed on the flat plate portion 10. Thereafter, when the pressing surface 18A comes into contact with the upper surface 11F of the first mold 11, the operation of the driving unit 18B is stopped.

  In this step S30, the second facing surface 12B moves (slides) in the pressing direction as the flat plate portion 10 is pressed by the first press portion 11A and the second press portion 12A. That is, the second facing surface 12 </ b> B moves in the same direction as the pressing direction of the flat plate part 10. Thereby, the frictional force generated by the sliding between the second main surface 10D and the second facing surface 12B during pressing is reduced, and the flat plate portion 10 can be formed with a smaller amount of pressing force.

  Further, the first and second opposing surfaces 11B and 12B are in contact with the flat plate portion 10 while being pressed. For this reason, folding does not occur in the flat plate portion 10 at the time of pressing, and the flow direction of the material does not become uneven, and the material of the flat plate portion 10 is reliably transferred from the both end portions 10A, 10B toward the thickening forming portion 15. Can be made to flow. Thereby, a thickened portion having a desired shape along the shape of the thickened forming portion 15 can be formed.

  Finally, step S40 for taking out the press-formed product is performed. In this step S40, after the press forming of the flat plate portion 10 is completed in the above step S30, the pressing member 18 is raised by operating the driving portion 18B. Then, the press-formed product 100 (FIG. 6) on which the thickened portion 100A is formed is taken out. The manufacturing method of the press-formed product according to the present embodiment is completed by the above steps S10 to S40.

[Function and effect]
Next, the characteristic structure and effect of the press molding apparatus 1 will be described.

  The press molding apparatus 1 brings the first press portion 11A, the second press portion 12A, the first facing surface 11B, the second facing surface 12B, and the first press portion 11A and the second press portion 12A closer to each other. And a drive unit 18B. On the first facing surface 11B, a thickening forming portion 15 for forming a thick portion in the flat plate portion 10 is formed. The 1st opposing surface 11B and the 2nd opposing surface 12B contact the flat plate part 10 in the middle of a press, and are mutually opposing. The thickening forming portion 15 is configured such that a part of the material of the flat plate portion 10 in the pressing direction flows by pressing the flat plate portion 10 with the first press portion 11A and the second press portion 12A. The second facing surface 12B is configured to move in the pressing direction along with the pressing of the flat plate portion 10 by the first press portion 11A and the second press portion 12A.

  In the press molding apparatus 1, the second facing surface 12 </ b> B can be moved in the pressing direction as the first press part 11 </ b> A and the second press part 12 </ b> A are brought close to each other to press the flat plate part 10. For this reason, the frictional force generated by the sliding between the second main surface 10D and the second facing surface 12B is further reduced as compared with the case of pressing in a state where the facing surface is fixed without moving as in the prior art. can do. As a result, the required pressing force can be further reduced.

  The graph of FIG. 7 shows the effect of reducing the load by pressing while moving the opposing surface as in this embodiment. In the graph of FIG. 7, “1” indicates the molding load and pressing load values when pressed without moving the opposing surface, and “2” indicates the molding load and pressing force when pressed while moving the opposing surface. The value of load is shown. The “molding load” is a load necessary for press molding of the flat plate portion 10, and the “pressing load” is a load for fixing the clearance between the molds. As is apparent from this graph, by pressing while moving the facing surface, the molding load is greatly reduced (down to about 1/10) compared to the case where the facing surface is not moved.

  In the press molding apparatus 1, the flat plate portion 10 is pressed by the first press portion 11 </ b> A and the second press portion 12 </ b> A, and a part of the material of the flat plate portion 10 in the pressing direction is caused to flow into the thickening forming portion 15. The thickened portion 100A, which is a thick portion, can be formed on the flat plate portion 10. Here, since the first facing surface 11B and the second facing surface 12B are in contact with the flat plate portion 10 and are opposed to each other during the pressing, the flat plate portion 10 is bent during the pressing, so that It can suppress that a flow direction becomes non-uniform | heterogenous. That is, the flow control of the material becomes possible. For this reason, the material of the flat plate part 10 can be surely flowed into the thickening forming part 15, and the thickening part 100A having a desired shape can be formed.

  In the press molding apparatus 1, the first press part 11A and the first opposing surface 11B are provided in the same first mold 11, and the second press part 12A and the second opposing surface 12B are provided in the same second mold 12. Is provided. Thereby, compared with the case where the 1st press part 11A and the 1st counter surface 11B are provided in a separate member, and the 2nd press part 12A and the 2nd counter surface 12B are provided in a separate member, press forming device 1 This structure can be further simplified.

  In the press molding apparatus 1, the first opposing surface 11B and the second opposing surface 12B are arranged along the vertical direction. Thereby, compared with the case where the 1st opposing surface 11B and the 2nd opposing surface 12B are arrange | positioned so that a horizontal direction may be followed, the installation area of the press molding apparatus 1 can be made small, and space saving can be achieved. it can.

[Modification 1]
Next, a press forming apparatus 1A according to Modification 1 of Embodiment 1 will be described with reference to FIGS. In the press molding apparatus 1A according to Modification 1, the facing portion 11C of the first mold 11 and the guide portion 11D are provided separately from each other. The pressing member 18 includes a main body portion 18D having an upper surface 18C with which the driving portion 18B comes into contact, and a pressing portion 18E fixed to the lower surface 18G of the main body portion 18D. The pressing portion 18E has a shape in which a pressing portion main body 18H fixed to the lower surface 18G by a fixing member such as a bolt B, and a first pressing portion 18F and a second pressing portion 18I are connected to each other. The pressing portion 18E has a shape in which a U-shape is turned upside down in a sectional view.

  The pressing portion main body 18H has a pressing surface 18J that presses the upper surface 12C of the second mold 12. The first and second pressing portions 18F and 18I extend downward in the vertical direction from both ends of the pressing portion main body 18H in the horizontal direction.

  A first inner surface 18K is formed inside the first pressing portion 18F, and a second inner surface 18L is formed inside the second pressing portion 18I. The horizontal distance between the first inner surface 18K and the second inner surface 18L is slightly larger than the horizontal distance between the side surfaces of the first mold 11 (opposing portion 11C) and the second mold 12. For this reason, as shown in FIG. 9, when the pressing member 18 is lowered and the flat plate portion 10 is pressed, the first mold 11 (opposing portion 11C) and the second mold 12 are moved to the first and second pressing portions 18F. , 18I. Thereby, the position shift of the 1st and 2nd metal mold | dies 11 and 12 at the time of a press can be prevented more reliably.

(Embodiment 2)
Next, a press molding apparatus 2 and a method for manufacturing a press molded product according to Embodiment 2 of the present invention will be described with reference to FIGS. In the second embodiment, only parts different from the first embodiment will be described in detail.

[Configuration of press molding equipment]
The press molding apparatus 2 includes a first mold 21, a second mold 22, a support member 26, and a drive unit 28B. The first mold 21 has a substantially rectangular parallelepiped shape. The first opposed surface 21B facing the first main surface 10C, the first side surface 21C facing away from the first opposed surface 21B, and the first end portion 10A. 1st press part 21A which opposes. Thus, the first press portion 21A and the first facing surface 21B are provided in the same first mold 21. The first mold 21 is fixed to the fixing surface 26A of the support member 26 on the first side surface 21C by a fixing member such as a bolt B.

  The first opposing surface 21B has an upper end connected to the upper surface 21F and is disposed along the vertical direction. The first press portion 21A is connected to the lower end of the first facing surface 21B and intersects the first facing surface 21B so as to form an acute angle. In the vicinity of the center of the first facing surface 21B, there is formed a groove-shaped thickening portion 25 for forming a thickened portion by allowing a part of the material of the flat plate portion 10 to flow during pressing.

  The second mold 22 includes a second mold body 28 and a mold fixing member 29 connected to the upper surface of the second mold body 28. The second mold body 28 has a rectangular parallelepiped shape that can be inserted into a mold space 26 </ b> B formed in the support member 26. The second mold body 28 includes a second facing surface 22B facing the second main surface 10D, a second side surface 22C facing away from the second facing surface 22B, and a second press facing the second end portion 10B. 22A. As described above, the second press portion 22A and the second facing surface 22B are provided in the same second mold 22. The second opposing surface 22B has an upper end connected to the second press portion 22A and is disposed along the vertical direction. The second press portion 22A intersects the second facing surface 22B so as to form an acute angle. The mold fixing member 29 has substantially the same width as the support member 26, and is fixed to the upper surface of the second mold body 28 by bolts B.

  In the state where the second mold body 28 is inserted into the mold space 26B (FIG. 11), the second facing surface 22B faces the first facing surface 21B in the horizontal direction across the flat plate portion 10, And the 2nd press part 22A is arrange | positioned so as to oppose the 1st press part 21A in the perpendicular direction on both sides of the flat plate part 10. As shown in FIG. Thereby, the flat plate part 10 can be disposed between the first mold 21 and the second mold 22. At this time, the first facing surface 21B and the second facing surface 22B are in contact with the flat plate portion 10 while being pressed. The second mold body 28 is guided to move in the vertical direction when the second side surface 22 </ b> C comes into contact with the guide roller 27.

  The support member 26 is a metal member in which a concave mold space 26B into which the second mold body 28 is inserted is formed. The support member 26 includes a fixed surface 26A to which the first mold 21 is fixed, a bottom surface 26C facing the lower surface 22D of the second mold body 28, and a guide surface 26D on which a plurality of guide rollers 27 are disposed. Have.

  The drive unit 28B is disposed in contact with the upper surface 29A of the mold fixing member 29. The drive unit 28B has a hydraulic or electric piston as in the first embodiment, and moves the second mold 22 downward in the vertical direction by pressing the upper surface 29A.

[Press-molded product manufacturing method]
Next, a method for manufacturing a press-formed product using the press-forming apparatus 2 will be described. First, a member to be pressed including the flat plate portion 10 that has been softened by heating is prepared (FIG. 3: S10). Next, in a state where the second mold 22 is located above the first mold 21 (FIG. 10), the flat plate portion 10 is installed on the first mold 21. Then, by operating the drive unit 28B, the second mold 22 is lowered so that the second mold body 28 is inserted into the mold space 26B, and the second press unit 22A is brought into contact with the second end 10B. (FIG. 11). Thus, the member to be pressed is installed so that the first main surface 10C faces the first facing surface 21B and the second main surface 10D faces the second facing surface 22B (FIG. 3: S20). At this time, the flat plate portion 10 is in a state in which the first and second main surfaces 10C and 10D are along the vertical direction. Further, the first facing surface 21B and the second facing surface 22B face each other so as to come into contact with the flat plate portion 10 during pressing.

  Next, the second press part 22A is moved closer to the first press part 21A by operating the drive part 28B and further lowering the second mold 22. Thereby, the flat plate portion 10 is pressed in a direction parallel to the main surfaces 10C and 10D by the first press portion 21A and the second press portion 22A, and a part of the material of the flat plate portion 10 flows into the thickening forming portion 25. (FIG. 12). Thereby, the thickened part which is a thick part is formed in a part of flat plate part 10 (Drawing 3: S30). At this time, in the same manner as in the first embodiment, the second facing surface 22B moves in the pressing direction with the pressing of the flat plate portion 10 by the first press portion 21A and the second press portion 22A. And after the press of the flat plate part 10 is completed, the 2nd metal mold | die 22 is raised by operating the drive part 28B, and a press molded product is taken out (FIG. 3: S40).

  In the second embodiment, as in the first embodiment, the second facing surface 22B moves in the pressing direction as the flat plate portion 10 is pressed in the vertical direction by the first press portion 21A and the second press portion 22A. To do. For this reason, the frictional force generated by sliding between the second main surface 10D and the second facing surface 22B during pressing is reduced, and the flat plate portion 10 can be formed with a smaller amount of pressing force. In addition, since the first facing surface 21B and the second facing surface 22B are in contact with the flat plate portion 10 and are opposed to each other during the pressing, the flow direction of the material of the flat plate portion 10 is made nonuniform due to the folding that occurs during pressing. Therefore, the material of the flat plate portion 10 can be reliably flowed toward the thickening forming portion 25. In the second embodiment, the first side surface 21C of the first mold 21 is fixed to the support member 26, and the second mold 22 (second mold body 28) is placed in the mold space 26B of the support member 26. Since it is the structure inserted, it can prevent more reliably the position shift of the 1st and 2nd metal mold | dies 21 and 22 at the time of a press.

[Modification 1]
Next, a press forming apparatus 2A according to Modification 1 of Embodiment 2 will be described with reference to FIGS. The press forming apparatus 2A according to Modification 1 further includes a temporary pressing member 26E that prevents the flat plate member 10 from falling down.

  The press molding apparatus 2A has a pair of thin plate-like temporary pressing members 26E. As shown in FIG. 14, the temporary pressing member 26 </ b> E is attached to the outside of the insertion region of the second mold 22. The temporary holding member 26E has an elongated shape extending from the lower end toward the upper end, the upper end is bent in a direction away from the flat plate portion 10, and is attached to the support member 26 by a fixture 26F at the lower end. The temporary pressing member 26E is in contact with the second main surface 10D at both ends of the flat plate portion 10 so that the first main surface 10C and the second main surface 10D are maintained in a state along the vertical direction. 10 is supported.

  In the press molding apparatus 2A, first, the flat plate portion 10 is disposed between the first mold 21 and the temporary pressing member 26E. Here, the flat plate portion 10 is supported by the temporary pressing member 26E, so that the first and second main surfaces 10C and 10D are maintained in a vertically placed state along the vertical direction. Thereafter, the second mold 22 (second mold body 28) is inserted into the mold space 26B, and the flat plate portion 10 is disposed between the first mold 21 and the second mold 22. As described above, by using the temporary holding member 26E, the flat plate portion 10 is stably supported so that the flat plate portion 10 does not fall down even before the flat plate portion 10 is disposed between the first mold 21 and the second mold 22. can do.

[Modification 2]
Next, a press forming apparatus 2B according to Modification 2 of Embodiment 2 will be described with reference to FIGS. 15 and 16. The press molding apparatus 2B according to Modification 2 includes a back pressure application unit 25E that applies pressure to the material of the flat plate part 10 that has flowed into the thickening formation unit 25A.

  A thickening formation portion 25 </ b> A that is a hole penetrating in the horizontal direction is formed substantially at the center of the first mold 21. A through hole 26G is formed in the support member 26, and the through hole 26G communicates with the thickening portion 25A.

  The back pressure application portion 25E includes a pad portion 25B, an elastic member 25C, and a support portion 25D. The pad portion 25B has a convex shape and is disposed in the thickening formation portion 25A. The elastic member 25C is configured by a spring for urging the pad portion 25B, and is disposed in the through hole 26G. The elastic member 25C is disposed between the pad portion 25B and the support portion 25D, and both ends thereof may be connected to the pad portion 25B and the support portion 25D or may not be connected. The support portion 25 </ b> D is fixed so as to be integrated with the support member 26.

  When the flat plate portion 10 is pressed by the first press portion 21A and the second press portion 22A, the material of the flat plate portion 10 flows into the thickening forming portion 25A while pressing the pad portion 25B to compress the elastic member 25C. Here, the restoring force of the elastic member 25C is applied to the material flowing into the thickening forming portion 25A via the pad portion 25B. That is, the material of the flat plate portion 10 flows into the thickening forming portion 25A while being applied with pressure by the back pressure applying portion 25E. Thereby, generation | occurrence | production of the folding in the flat plate part 10 can be prevented more effectively in the process in which the flat plate part 10 is pressed and material flows into the thickening formation part 25A.

(Embodiment 3)
Next, a press molding apparatus 3 and a method for manufacturing a press molded product according to Embodiment 3 of the present invention will be described with reference to FIGS. In the third embodiment, only portions different from the first embodiment will be described in detail.

[Configuration of press molding equipment]
The press molding apparatus 3 includes a first mold 33, a second mold 34 disposed above the first mold 33, a support member 39 on which the first mold 33 is placed, a pressing member 38, And a drive unit 38B. The first mold 33 includes a first dividing unit 31 and a second dividing unit 32 that is formed separately from the first dividing unit 31. The 1st division part 31 and the 2nd division part 32 are arranged facing the horizontal direction.

  The first divided portion 31 includes a first pressed portion 31D pressed by the pressing member 38, a first press portion 31E that presses the flat plate portion 10, and a first placement portion 31F on which the flat plate portion 10 is placed. Have. A first pressed surface 31C that is pressed by the first pressing surface 38F is formed on the first pressed portion 31D. A first press portion 31A facing the first end portion 10A of the flat plate portion 10 is formed on a side portion of the first press portion 31E. A first facing surface 31B facing the first main surface 10C of the flat plate portion 10 is formed on the upper portion of the first placement portion 31F.

  The second dividing unit 32 has a shape symmetric to the first dividing unit 31. That is, the second divided portion 32 includes a second pressed portion 32D pressed by the pressing member 38, a second press portion 32E that presses the flat plate portion 10, and a second placement portion on which the flat plate portion 10 is placed. 32F. A second pressed surface 32C that is pressed by the second pressing surface 38G is formed on the second pressed portion 32D. A second press portion 32A that faces the second end portion 10B of the flat plate portion 10 is formed on a side portion of the second press portion 32E. A first facing surface 32B facing the first main surface 10C of the flat plate portion 10 is formed on the upper portion of the second placement portion 32F. The first facing surfaces 31B and 32B are arranged in a horizontal state along the horizontal direction (parallel to the horizontal direction).

  The 1st and 2nd mounting parts 31F and 32F have the comb-tooth shape which mutually meshes | engages, respectively. That is, as shown by an arrow in FIG. 17B, the first and second mounting portions 31F and 32F are brought close to each other, so that the comb teeth of the first mounting portion 31F are comb teeth in the second mounting portion 32F. The comb teeth of the second placement part 32F are inserted into the gaps between the comb teeth in the first placement part 31F.

  The second mold 34 has a substantially rectangular parallelepiped shape and has a second facing surface 34B that faces the second main surface 10D of the flat plate portion 10. The second facing surface 34B is arranged in a horizontally placed state along the horizontal direction (parallel to the horizontal direction). In the vicinity of the center of the second facing surface 34B, a groove-shaped thickening portion 35 is formed. By pressing a part of the material of the flat plate portion 10 into the thickening portion 35 during pressing, the flat plate A thickened portion which is a thick portion can be formed in the portion 10. Further, in a state where the flat plate portion 10 is disposed between the first and second molds 33 and 34 (FIG. 18), the first opposed surfaces 31B and 32B and the second opposed surface 34B are placed on the flat plate portion 10 during the pressing. Touch and face each other.

  The support member 39 is for mounting the first mold 33 and is a rectangular parallelepiped metal member. A plurality of guide rollers 37 are arranged on the upper surface of the support member 39, whereby the first and second divided portions 31 and 32 can be slid in the horizontal direction.

  The pressing member 38 is a member for sliding in the horizontal direction by pressing the first and second divided portions 31 and 32. The pressing member 38 includes a main body portion 38A that comes into contact with the driving portion 38B, and a pressing portion 38B that is fixed to the lower surface of the main body portion 38A. The pressing portion 38B has a shape in which a pressing portion main body 38C fixed to the lower surface of the main body portion 38A by a bolt B, and a first extending portion 38D and a second extending portion 38E are connected to each other. The cross section of the pressing portion 38B cut along the width direction of the flat plate portion 10 (left and right direction in FIG. 17B) and the plane including the vertical direction has a shape in which the U-shape is turned upside down. The lower surface of the pressing portion main body 38 </ b> C is connected to the upper surface of the second mold 34 by a plurality (two) of springs 36. A first pressing surface 38F that presses the first dividing portion 31 is formed at the tip of the first extending portion 38D, and a second pressing that presses the second dividing portion 32 at the tip of the second extending portion 38E. A surface 38G is formed.

  The drive part 38B is disposed in contact with the upper surface of the pressing member 38 (main body part 38A). The drive part 38B has a hydraulic or electric piston as in the first embodiment, and moves downward in the vertical direction by pressing the pressing member 38.

[Press-molded product manufacturing method]
Next, a method for manufacturing a press-formed product using the press-forming apparatus 3 will be described. First, a member to be pressed including the flat plate portion 10 that has been softened by heating is prepared (FIG. 3: S10).

  Next, in a state where the second mold 34 is on the upper side (FIG. 17), the flat plate portion 10 is disposed on the first and second divided portions 31 and 32 with the first main surface 10C facing downward. (FIG. 17). Next, by operating the drive unit 38B, the pressing member 38 is lowered, and the second mold 34 fixed to the pressing member 38 is similarly lowered. Accordingly, as shown in FIG. 18 (A), the flat plate portion 10 so that the first main surface 10C faces the first facing surfaces 31B and 32B and the second main surface 10D faces the second facing surface 34B. Is installed (FIG. 3: S20). At this time, the first facing surfaces 31B and 32B and the second facing surface 34B face each other so as to come into contact with the flat plate portion 10 during pressing.

  Next, by operating the driving portion 38B to further lower the pressing member 38, the first and second pressing surfaces 38F and 38G come into contact with the first and second pressed surfaces 31C and 32C, respectively (FIG. 19 ( A)). By further lowering the pressing member 38 in this state, the first pressing surface 38F slides on the first pressed surface 31C while the first divided portion 31 is slid toward the second divided portion 32, and the second pressing surface 38G. Slides the second divided portion 32 toward the first divided portion 31 while sliding on the second pressed surface 32C. Thereby, the 1st and 2nd division | segmentation parts 31 and 32 approach so that the front-end | tip of one comb tooth may contact | abut to the hollow between other comb teeth (FIG. 19 (B)). Thus, when the 1st and 2nd division parts 31 and 32 approach, the 1st and 2nd press parts 31A and 32A approach mutually, and flat plate part 10 is pressed in the horizontal direction from the both ends 10A and 10B side. . Thereby, a part of the material of the flat plate portion 10 in the pressing direction flows into the thickening forming portion 35, and a thickened portion that is a thick portion is formed on the flat plate portion 10.

  In this pressing step, the first dividing portion 31 moves in the pressing direction of the first pressing portion 31A (the direction from the left to the right in the drawing) as the flat plate portion 10 is pressed by the first pressing portion 31A. . Moreover, the 2nd division | segmentation part 32 moves to the direction (direction toward the left from the right in the figure) of the press by the said 2nd press part 32A with the press of the flat plate part 10 by the 2nd press part 32A. Therefore, the first facing surface 31B moves in the direction of pressing by the first pressing portion 31A along with the pressing of the flat plate portion 10, and the second facing surface 32B moves along the pressing of the flat plate portion 10 to the second pressing portion 32A. Move in the direction of the press. Then, after the pressing of the flat plate portion 10 is completed, the pressing member 38 and the second mold 34 are raised by operating the driving portion 38B, and the press-formed product is taken out (FIG. 3: S40).

  In the third embodiment, the first mold 33 is divided into the first divided portion 31 and the second divided portion 32, and these are brought close to each other, whereby the first and second end portions 10A and 10B of the flat plate portion 10 are moved. Pressing can be performed by the first and second pressing portions 31A and 32A, respectively. For this reason, the 1st opposing surface 31B and the 1st opposing surface 32B can be moved to a mutually reverse direction so that it may become the same as each press direction by 1st and 2nd press part 31A, 32A. As a result, the frictional force generated between the first main surface 10C and the first facing surfaces 31B and 32B can be more effectively reduced, and the amount of pressing force can be further reduced. In addition, since the first and second divided portions 31 and 32 have a comb-teeth shape that meshes with each other, press molding can be performed while the flat plate portion 10 is stably supported.

[Modification 1]
Next, Modification 1 of Embodiment 3 will be described with reference to FIGS. In the press molding apparatus 3A according to the first modification, a plurality (two) of thickening forming portions 35 are formed at intervals from each other on the second facing surface 34B. Thereby, the material of the flat plate portion 10 can be caused to flow into each of the plurality of thickening forming portions 35 by pressing the flat plate portion 10 with the first and second press portions 31A and 32A (FIG. 22A). ), A press-molded product having a more complicated shape can be produced.

  In addition, the shape and size of each thickening forming portion 35 may be the same or different from each other. Further, the interval between the thickening forming portions 35 can be appropriately designed according to the shape of the press-formed product.

[Modification 2]
Next, a second modification of the third embodiment will be described with reference to FIGS. As described in the second modification of the second embodiment, the press molding apparatus 3B according to the second modification includes a back pressure applying unit 35D that applies pressure to the material of the flat plate portion 10 that has flowed into the thickening forming unit 35A. .

  A hole-shaped thickening portion 35A is formed in the vicinity of the center of the second facing surface 34B. The back pressure application portion 35D includes a pad portion 35B and an elastic member 35C. The pad portion 35B has a convex shape and is disposed in the thickening formation portion 35A. The elastic member 35 </ b> C is configured by a spring that biases the pad portion 35 </ b> B, and one end is connected to the pad portion 35 </ b> B and the other end is connected to the hole wall surface of the second mold 34.

  As shown in FIG. 24, when the flat plate portion 10 is pressed by the first and second press portions 31A and 32A, the material of the flat plate portion 10 flows into the thickening forming portion 35A while pressing the pad portion 35B. Here, the restoring force of the elastic member 35C is applied to the material flowing into the thickening forming portion 35A via the pad portion 35B. That is, the material of the flat plate portion 10 flows into the thickening forming portion 35A while being applied with pressure by the back pressure applying portion 35D. Thereby, in the process in which the material of the flat plate part 10 flows into the thickening forming part 35A, the occurrence of folding in the flat plate part 10 can be more effectively prevented.

[Modification 3]
Next, a third modification of the third embodiment will be described with reference to FIGS. 25 and 26. FIG. In the press molding apparatus 3C according to Modification 3, the first divided portion 31 and the second divided portion 32 are connected to each other by a spring 33A.

  The first dividing portion 31 includes a first mounting portion 31G having a quadrangular shape in plan view (FIG. 25B), and a first protruding portion 31H that protrudes from the side surface of the first mounting portion 31G. . A first facing surface 31B is formed on the first placement portion 31G. The first projecting portion 31H is provided with a step with respect to the first placement portion 31G so that the upper surface thereof is located below the first facing surface 31B (FIG. 25A). .

  The second division part 32 has a second placement part 32G having a square shape with a smaller area than the first placement part 31G in plan view (25 (B)). A first facing surface 32B is formed on the upper part of the second placement portion 32G. Moreover, the hollow part 32H is formed in the 2nd division part 32, and the 1st protrusion part 31H can be inserted in the said hollow part 32H. That is, the hollow portion 32H is formed larger than the first protruding portion 31H. The flat plate portion 10 is placed on the first facing surfaces 31B and 32B so as to straddle the first and second divided portions 31 and 32 (FIG. 25A).

  Thus, by connecting the first and second divided portions 31 and 32 to each other by the spring 33A, the positional relationship between the first and second divided portions 31 and 32 can be more reliably fixed. Further, by configuring the first protruding portion 31H to be insertable into the hollow portion 32H, it is possible to guide the horizontal movement of the first and second divided portions 31 and 32 during pressing.

[Modification 4]
Next, a fourth modification of the third embodiment will be described with reference to FIGS. In the press molding apparatus 3D according to Modification 4, the first dividing unit 31 includes a first placement unit 31I having a substantially right triangle shape in plan view (FIG. 27B). A first opposing surface 31B is formed on the upper portion of the first placement portion 31I. Moreover, the 2nd division part 32 has the 2nd mounting part 32I of the substantially right triangle shape symmetrical with the 1st mounting part 31I by planar view (FIG.27 (B)). A first facing surface 32B is formed on the upper portion of the second placement portion 32I. By bringing the first and second mounting portions 31I and 32I closer to each other, the inclined surfaces 31J and 32J having a right triangle come into contact with each other, and a rectangular mounting surface is formed in plan view (FIG. 28). Even in such a modified example, as in the case of the comb-teeth shape described in the third embodiment, the flat plate portion 10 can be pressed in a stably supported state.

  In addition, the shape of the 1st and 2nd division | segmentation parts 31 and 32 is not limited to the above-mentioned comb-tooth shape, a right triangle shape, etc. Specifically, when the thickened portion is formed on the flat plate portion 10 by pressing, various shapes can be used as long as the first and second divided portions 31 and 32 overlap each other in at least part of the pressing direction. Can be adopted.

  Further, in the case where the comb-teeth shape is adopted, the present invention is not limited to the case where the comb teeth are completely in close contact with each other when the press is completed as shown in FIG. For example, as shown in FIG. 29, in the region R circumscribing the pair of meshing portions at the time of completion of the press, there may be a gap S that does not allow the material to flow in during the molding process and does not cause folding.

(Embodiment 4)
Next, a press molding apparatus 4 and a method for manufacturing a press molded product according to Embodiment 4 of the present invention will be described with reference to FIGS. 30 to 32. In the fourth embodiment, only parts different from the first embodiment will be described in detail.

[Configuration of press molding equipment]
The press molding apparatus 4 includes a first mold 41, a second mold 42, a mold opening preventing member 43, a pressing member 48, and a drive unit 48B.

  The first mold 41 includes a first pressed portion 41D pressed by the pressing member 48, a first press portion 41E that presses the flat plate portion 10, and a first placement portion 41F on which the flat plate portion 10 is placed. Have. A first pressed surface 41C that is pressed by the first pressing surface 48F is formed on the first pressed portion 41D. The first pressed portion 41D is provided on both the near side and the far side of the paper surface. A first press portion 41A facing the first end portion 10A of the flat plate portion 10 is formed on the side portion of the first press portion 41E. A first facing surface 41B that faces the first main surface 10C of the flat plate portion 10 is formed on the upper portion of the first placement portion 41F. Thus, the first press part 41A and the first opposing surface 41B are provided in the same first mold 41. The first opposing surface 41B is arranged in a horizontal state along the horizontal direction, and the first press portion 41A is connected to the end of the first opposing surface 41B so as to form an acute angle with the first opposing surface 41B. ing. Further, when a portion of the material of the flat plate portion 10 flows into the first facing surface 41B during pressing, a concave groove-shaped thickening forming portion 45 for forming a thick portion on the flat plate portion 10 is formed. Is formed.

  The second mold 42 is disposed on the first mold 41 and has a substantially symmetric structure with the first mold 41. That is, the second mold 42 includes a second pressed portion 42D pressed by the pressing member 48, a second press portion 42E that presses the flat plate portion 10, a second opposing portion 42F that faces the flat plate portion 10, Have A second pressed surface 42C that is pressed by the second pressing surface 48G is formed in the second pressed portion 42D. The second pressed portion 42D is provided on both the front side and the back side of the paper. A second press portion 42A facing the second end portion 10B of the flat plate portion 10 is formed on the side portion of the second press portion 42E. A second facing surface 42B facing the second main surface 10D of the flat plate portion 10 is formed below the second facing portion 42F. Thus, the second press part 42A and the second facing surface 42B are provided in the same second mold 42. The second facing surface 42B is disposed in a horizontal state along the horizontal direction, and the second press portion 42A is connected to the end of the second facing surface 42B so as to form an acute angle with respect to the second facing surface 42B. ing.

  The first facing surface 41B and the second facing surface 42B are in contact with the flat plate portion 10 while being pressed. A plurality of guide rollers 47 are disposed below the second mold 42, and the second mold 42 can be slid on the first mold 41 in the horizontal direction.

  The mold opening preventing member 43 is a member for suppressing the mold opening of the first mold 41 and the second mold 42, and has a quadrangular shape surrounding the first mold 41 and the second mold 42. The mold opening preventing member 43 has a part located above the second mold 42 and a part located below the first mold 41, and the first and second molds 41, 42 are moved up and down. Prevents mold opening by pinching. The mold opening prevention member 43 has an inner upper surface 43A and an inner lower surface 43B. A plurality of upper guide rollers 47A are arranged on the inner upper surface 43A, and a plurality of lower guide rollers 47B are arranged on the inner lower surface 43B. Yes. The first mold 41 is slidable in the horizontal direction by having the upper surface 41G in contact with the upper guide roller 47A and the lower surface 41H in contact with the lower guide roller 47B. Further, the second die 42 can slide in the horizontal direction in the same manner as the upper surface 42G contacts the upper guide roller 47A and the guide roller 47 contacts the first die 41.

  The pressing member 48 is a member for sliding in the horizontal direction by pressing the first and second molds 41 and 42. The pressing member 48 includes a main body portion 48A that comes into contact with the driving portion 48B, and a pressing portion 48B that is fixed to the lower surface of the main body portion 48A. The pressing portion 48B has a shape in which the pressing portion main body 48C fixed to the lower surface of the main body portion 48A by the bolt B, and the first extending portion 48D and the second extending portion 48E are connected to each other. The pressing portion 48B has a shape that is U-shaped upside down in a cross-sectional view. A first pressing surface 48F that presses the first mold 41 is formed at the tip of the first extension 48D, and a second press that presses the second mold 42 at the tip of the second extension 48E. A surface 48G is formed. The first and second extending portions 48D and 48E are provided on both the front side and the back side of the paper surface.

  The drive part 48B is disposed in contact with the upper surface of the pressing member 48 (main body part 48A). The driving part 48B has a hydraulic or electric piston as in the first embodiment, and moves the driving member 48B downward in the vertical direction by pressing the pressing member 48.

[Press-molded product manufacturing method]
Next, a method for manufacturing a press-formed product using the press-forming device 4 will be described. First, a member to be pressed including the flat plate portion 10 that has been softened by heating is prepared (FIG. 3: S10). Next, the flat plate portion 10 is disposed between the first mold 41 and the second mold 42. Thus, as shown in FIG. 30, the member to be pressed is installed such that the first main surface 10C faces the first facing surface 41B and the second main surface 10D faces the second facing surface 42B ( Figure 3: S20). At this time, the first facing surface 41B and the second facing surface 42B face each other so as to come into contact with the flat plate portion 10 during pressing.

  Next, by operating the drive unit 48B to lower the pressing member 48, the first and second pressing surfaces 48F and 48G come into contact with the first and second pressed surfaces 41C and 42C, respectively (FIG. 31). By further lowering the pressing member 38 in this state, the first pressing surface 48F slides on the first pressed surface 41C while sliding the first mold 41 in the horizontal direction, and the second pressing surface 48G is moved to the second pressed surface. The second mold 42 is slid in the horizontal direction while sliding on the pressing surface 42C. Thereby, the first and second press portions 41A and 42A approach each other, and the flat plate portion 10 is pressed in the horizontal direction from both end portions 10A and 10B. Thereby, a part of material of the flat plate part 10 in the pressing direction flows into the thickening part 45, and a thickened part which is a thick part is formed in the flat plate part 10 (FIG. 3: S30).

  In this pressing step, the first facing surface 41B moves in the pressing direction as the flat plate portion 10 is pressed by the first press portion 41A, and the second facing surface 42B is pressed by the second press portion 42A. As a result, it moves in the direction of the press. That is, both the first and second facing surfaces 41B and 42B move in the pressing direction as the flat plate portion 10 is pressed. For this reason, it is possible to reduce both the frictional force generated by sliding between the first main surface 10C and the first opposing surface 41B and the frictional force generated by sliding between the second main surface 10D and the second opposing surface 42B. It is possible to further reduce the amount of pressing force required for forming the flat plate portion 10. Then, after the pressing of the flat plate portion 10 is completed, the pressing member 48 is raised by operating the driving portion 48B, and the press-formed product is taken out (FIG. 3: S40).

[Modification 1]
Next, Modification 1 of Embodiment 4 will be described with reference to FIGS. As shown in FIG. 33, in the press molding apparatus 4A according to the first modification, the thickening formation portion 45 is formed not on the first opposing surface 41B but on the second opposing surface 42B. As a result, as shown in FIGS. 34 and 35, the material of the flat plate portion 10 is caused to flow into the thickening forming portion 45 by pressing the flat plate portion 10 with the first and second press portions 41A and 42A. A press-formed product having a thickened portion formed on the surface 10D side can be manufactured. In addition, when the thickened portion is formed on both the first main surface 10C and the second main surface 10D, the thickened portion 45 may be formed on both the first opposed surface 41B and the second opposed surface 42B. .

(Other embodiments)
Finally, other embodiments of the present invention will be described. The present invention is not only applicable to a pressed member that is entirely constituted by a single flat plate portion as described above, but can also be applied to a pressed member that has a flat plate portion in part. For example, as shown in FIG. 36, the present invention can be applied to a bent member 10E having a bent shape having a plurality (two) of flat plate portions 10F.

  More specifically, the press molding apparatus 7 includes an upper mold 71 having first and second upper molds 71A and 71B, a lower mold 72 having first and second lower molds 72A and 72B, The pressed member 10 </ b> E is disposed between the upper mold 71 and the lower mold 72. The first upper die 71A is formed with a first press portion 71C that faces the first end portion 10A of the flat plate portion 10F, and the second upper die 71B is opposed to the first main surface 10C of the flat plate portion 10F. A first facing surface 71D is formed. The first lower mold 72A has a second facing surface 72D that faces the second main surface 10D of the flat plate portion 10F, and the second lower mold 72B has a second end portion 10B of the flat plate portion 10F. Opposing second press part 72C is formed.

  36, the flat plate portion 10F is pressed in a direction parallel to the main surfaces 10C and 10D by the first press portion 71C and the second press portion 72C by lowering the first upper mold 71A as indicated by an arrow in FIG. When the material of the portion 10F flows into the thickening forming portion 75, the thickening portion is formed. At this time, when the first lower mold 72A is pressed by the first upper mold 71A and lowered, the second facing surface 72D moves in the press direction. For this reason, the frictional force caused by sliding between the second main surface 10D and the second opposing surface 72D is reduced, and the amount of pressing force required for forming the flat plate portion 10F can be reduced as in the first to fourth embodiments. .

  Moreover, it is not limited to the case where the whole flat plate part 10 is heated with the electric furnace F (FIG. 4), As shown in FIG. 37, the several electrode 101 is arrange | positioned at intervals at the main surface of the flat plate part 10, and the said electrode 101 The heating temperature raising part 102 may be partially formed by energizing to (partial energization heating). Then, as shown in FIG. 38, the flat plate portion 10 is pressed in a state where it is disposed between the molds 91 and 92, whereby the material in the heating temperature raising portion 102 is caused to flow into the thickening forming portion 95 to increase the thickening portion. May be formed. As described above, since the portion other than the heating temperature raising portion 102 in the flat plate portion 10 is brought into a low temperature state without being heated, the low temperature portion is maintained in a high strength state without being softened. The friction coefficient between the molds 91 and 92 and the flat plate part 10 can be further reduced. Further, not only such partial energization heating, but the entire flat plate portion 10 may be energized and heated.

  It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1, 1A, 2, 2A, 2B, 3, 3A, 3B, 3C, 3D, 4, 4A, 7 Press forming device 10, 10F Flat plate portion 10A First end portion 10B Second end portion 10C First main surface 10D First 2 main surfaces 11, 21, 33, 41 1st mold 12, 22, 34, 42 2nd mold 31 1st division part 32 2nd division part 11A, 21A, 31A, 41A, 71C 1st press part 12A, 22A, 32A, 42A, 72C 2nd press part 11B, 21B, 31B, 41B, 71D 1st opposing surface 12B, 22B, 32B, 42B, 72D 2nd opposing surface 18B, 28B, 38B, 48B Drive part 15, 25, 25A, 35, 35A, 45, 75 Thickening forming part 26E Temporary pressing part 25E, 35D Back pressure applying part

Claims (16)

A method for producing a press-formed product by molding a pressed member including a flat plate part,
The first main surface of the flat plate portion is opposed to the first opposing surface, and the second main surface which is the main surface facing the first main surface of the flat plate portion is opposed to the second opposing surface, Installing the pressed member in a press molding apparatus;
The first press portion facing the first end portion of the flat plate portion and the second press portion facing the second end portion, which is the end portion of the flat plate portion opposite to the first end portion, are brought closer to each other. A step of pressing the flat plate part,
The first opposed surface and the second opposed surface are in contact with the flat plate portion during pressing and are opposed to each other,
In the pressing step,
A thick portion is formed in the flat plate portion by flowing a part of the material of the flat plate portion in the pressing direction into the thickening forming portion formed in at least one of the first opposed surface and the second opposed surface. ,
A method for manufacturing a press-formed product, wherein at least one of the first facing surface and the second facing surface moves in a pressing direction along with pressing of the flat plate portion by the first pressing portion and the second pressing portion.   In the step of installing the member to be pressed, a mold provided with the first press part and the first opposing surface, a mold provided with the second press part and the second opposing surface, The method for producing a press-formed product according to claim 1, wherein the flat plate portion is installed between the two. The mold having the first facing surface has a first divided portion and a second divided portion formed separately from the first divided portion,
The first press part is formed in the first divided part,
The second press part is formed in the second divided part,
In the step of pressing, the first divided portion moves in the pressing direction of the first press portion along with the pressing of the flat plate portion by the first press portion, and the flat plate portion by the second press portion The method of manufacturing a press-formed product according to claim 1, wherein the second divided portion moves in a pressing direction of the second press portion along with the pressing. The first divided portion and the second divided portion each have a comb tooth shape that meshes with each other,
4. The method for manufacturing a press-formed product according to claim 3, wherein in the pressing step, the first divided portion and the second divided portion are close to each other so that the comb teeth mesh with each other.   The press molding according to claim 1 or 2, wherein, in the step of installing the pressed member, the pressed member is installed so that the first main surface and the second main surface of the flat plate portion are along a vertical direction. Product manufacturing method.   6. The step of installing the pressed member maintains the first main surface and the second main surface along a vertical direction by supporting the flat plate portion with a temporary pressing member. Manufacturing method of press-molded products.   The method for manufacturing a press-formed product according to any one of claims 1 to 6, wherein in the pressing step, pressure is applied to the material of the flat plate portion that has flowed into the thickening forming portion.   The method for manufacturing a press-formed product according to any one of claims 1 to 7, wherein the pressed member is formed by hot pressing. A press molding apparatus for molding a pressed member including a flat plate part,
A first press portion facing the first end of the flat plate portion;
A second press portion facing a second end portion which is an end portion opposite to the first end portion in the flat plate portion;
A first facing surface facing the first main surface of the flat plate portion;
A second opposing surface that opposes a second main surface that is a main surface facing away from the first main surface in the flat plate portion;
A drive unit that brings the first press unit and the second press unit closer to each other so as to press the flat plate unit,
On at least one of the first facing surface and the second facing surface, a thickening forming portion for forming a thick portion on the flat plate portion is formed,
The first opposed surface and the second opposed surface are in contact with the flat plate portion during pressing and are opposed to each other,
The thickening portion is configured such that a part of the material of the flat plate portion in the pressing direction flows by pressing the flat plate portion by the first press portion and the second press portion,
At least one of the first facing surface and the second facing surface is configured to move in a pressing direction along with the pressing of the flat plate portion by the first pressing portion and the second pressing portion. Molding equipment. The first press part and the first facing surface are provided in the same mold,
The press molding apparatus according to claim 9, wherein the second press portion and the second facing surface are provided in the same mold. The mold having the first facing surface has a first divided portion and a second divided portion formed separately from the first divided portion,
The first press part is formed in the first divided part,
The press forming apparatus according to claim 9, wherein the second press part is formed in the second divided part.   The press forming apparatus according to claim 11, wherein the first divided portion and the second divided portion each have a comb tooth shape that meshes with each other.   The press molding apparatus of Claim 9 or 10 arrange | positioned so that the said 1st opposing surface and the said 2nd opposing surface may follow a perpendicular direction.   The press molding apparatus of Claim 13 provided with the temporary pressing member which supports the said flat plate part so that the state where the said 1st main surface and the said 2nd main surface followed the perpendicular direction was maintained.   The press molding apparatus of any one of Claims 9-14 provided with the back pressure provision part which provides a pressure to the material of the said flat plate part which flowed into the said thickening formation part.   The press molding apparatus according to any one of claims 9 to 15, wherein the pressed member is molded by hot pressing.

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