WO2016031159A1 - Press-molding method and method for producing press-molded component - Google Patents
Press-molding method and method for producing press-molded component Download PDFInfo
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- WO2016031159A1 WO2016031159A1 PCT/JP2015/004015 JP2015004015W WO2016031159A1 WO 2016031159 A1 WO2016031159 A1 WO 2016031159A1 JP 2015004015 W JP2015004015 W JP 2015004015W WO 2016031159 A1 WO2016031159 A1 WO 2016031159A1
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- vertical wall
- wall portion
- blank
- shear deformation
- wrinkle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
Definitions
- the present invention relates to a press molding technique for molding a press molded part having a curved vertical wall such as a curved channel part.
- the present invention is a technique particularly suitable for press molding of the curved portion of the vertical wall portion that shrinks and deforms in accordance with molding.
- drawing or foam bending
- a simple-shaped channel part consisting of a vertical wall part and a top plate part that continues to the vertical wall part, with no curved part in the vertical wall part, is manufactured by foam molding, and a channel part with a flange is manufactured by drawing. Is done.
- foam molding a blank (a plate-shaped workpiece) is placed on a punch, and the blank is bent by a die to obtain a product shape.
- the blank may be pressed between the punch and the pad.
- a wrinkle presser is arranged at a position to be a flange portion, a blank is placed on a punch and a wrinkle presser, and a die is placed above the blank.
- the blank is pressed with a die and a crease, and the blank is bent while applying an appropriate tension to the blank.
- the material (blank) largely pulled between the punch and the die by being pressed by the die and the wrinkle presser forms a vertical wall portion. Therefore, even if it is a material with poor ductility, shaping
- the press-formed product for automobiles includes a curved channel part (such as a lower arm part shown in FIG. 10) having a curved part on a vertical wall part and a curved channel part (such as a part shown in FIG. 3) having a flange part.
- a part shape such as the part shape shown in FIG. 12 having a curved portion in the top plate portion or the like as the vertical wall portion is curved.
- the material when a curved channel part having a curved portion on the vertical wall portion is produced by foam molding, the material is drawn into the vertical wall portion forming space of the mold to form the vertical wall portion. It may be deformed by being compressed in the circumferential direction.
- the material at the time of molding, in the curved part that curves convexly on the top plate part side so that the boundary line between the top plate part and the vertical wall part becomes a convex curve on the top plate part side, the material The wire length is excessively excessive, and the material is compressed and deformed in the circumferential direction of the curved portion. This deformation is called “shrink flange deformation”.
- the shrinkage flange deformation is so large as to be drawn into the vertical wall portion forming space from a position away from the curved portion (for example, the portion denoted by reference numeral 42a in FIG. 10 or the portion denoted by reference numeral 22a in FIG. 3), the outer edge of the vertical wall portion Wrinkles occur when the compressive stress exceeds the buckling strength of the material near the part.
- Patent Documents 1 and 2 propose a method of pulling the edge of the vertical wall portion or the flange portion in order to prevent the shrinkage flange deformation.
- JP 07-39954 A Japanese Patent Laid-Open No. 11-123469
- Patent Documents 1 and 2 are methods of applying tension to compression due to shrinkage flange deformation, but metal plates with poor ductility such as high-strength steel plates and aluminum alloy plates give tensile stress to the edges. In addition, there is a problem that cracks are likely to occur at the edges. For this reason, these methods have their own limitations. When the vertical wall height or curved shape causes large shrinkage flange deformation, or when the yield strength of the material is high, wrinkles due to shrinkage flange deformation are prevented. I can't.
- An object of the present invention is a method for producing a press-molded part such as a curved channel part having a curved part on a vertical wall part by press molding, and provides a technique capable of suppressing shrinkage flange deformation generated in the vertical wall part and the flange part. It is to be.
- one embodiment of the present invention provides a flat plate-shaped workpiece (blank) having a base and a deformed portion including a portion that is continuous with the base and becomes a vertical wall, and at least the base
- a flat plate-shaped workpiece having a base and a deformed portion including a portion that is continuous with the base and becomes a vertical wall, and at least the base
- the vertical wall portion As a forming step, a portion of the base portion on the boundary side with the deforming portion and an outer portion of the deforming portion are separately restrained, and a portion to be the vertical wall portion of the deforming portion is subjected to shear deformation within a plate surface.
- a shear deformation step of generating a flow of material from the bending portion toward a portion away from the bending portion is provided at an outer edge portion of the portion serving as the vertical wall portion.
- FIG. 6 is a perspective view showing a curved channel part manufactured in the first to fifth embodiments. It is sectional drawing explaining the metal mold
- FIG. 2 is a cross-sectional view (corresponding to the AA cross-sectional view of FIG. 1A) for explaining the method of the first embodiment.
- FIG. 6 is a cross-sectional view (corresponding to the AA cross-sectional view of FIG. 1A) for explaining the method of the second embodiment. It is sectional drawing (equivalent to AA sectional drawing of Fig.1 (a)) explaining the method of 3rd Embodiment.
- a curved channel part will be described as an example of a press-molded part to be manufactured, but the present invention is not limited to a curved channel part.
- the vertical wall portion is a press-molded part having a curved portion that curves in a convex shape toward the top plate portion during molding, it is a target.
- the boundary portion between the top plate portion and the vertical wall portion is bent along a curved fold line (boundary line)
- the vertical wall portion 22 is convex toward the top plate portion 21 side.
- the curved portion is formed by out-of-plane deformation (curving) in the direction in which the vertical wall portion 22 protrudes from the top plate portion 21.
- the embodiment based on the present invention includes (1) a base portion 11 that does not deform before and after press molding and a deformable portion 12 that deforms, and the deformable portion 12 is a vertical wall portion.
- the portion 11a on the boundary side of the deformable portion 12 and the outer portion 12b of the deformable portion 12 are separately restrained, and the portion 12a that becomes the vertical wall portion of the deformable portion 12 is shear-deformed within the plate surface. Then, as shown in FIG.
- a shear deformation step for generating The outer portion 12b is a portion that becomes a flange portion when producing a curved channel component having a flange portion, and a portion that becomes a flange portion transiently when producing a curved channel component without a flange portion.
- the shear deformation is a form in which a rectangular ABCD is deformed into a parallelogram ABC1D1 when receiving forces (shearing forces) parallel to and opposite to each other in the AB direction and the DC direction. is there.
- the outer edge portion of the portion 12a to be the vertical wall portion is indicated by an arrow X (from the bending portion, from the bending portion). Since a material flow (toward a distant portion) is generated, the outer edge portion of the curved portion is contracted and flange deformation is less likely to occur.
- the shear deformation step the outer portion 12b and the boundary-side portion 11a are constrained, so that shrinkage flange deformation and wrinkle generation on these portions are suppressed.
- the outer portion 12b and the boundary-side portion 11a are constrained, so that the material cannot move, and the portion 12a that becomes the vertical wall portion is shear-deformed within the plate surface. It is done. Therefore, the shear deformation step can be performed stably even if the surface roughness and clearance of the mold, the cushioning force, the strength and elongation of the blank, the plate thickness, etc. fluctuate during mass production.
- the deformed portion in the step of forming the vertical wall portion, is outside the first constraining portion that constrains the boundary side portion as viewed from the thickness direction of the flat plate-shaped workpiece. From the state in which the second restraining part restraining the side part is separated, the second restraining part is made to have a direction in which the separation distance between the first restraining part and the second restraining part becomes smaller as the boundary part is bent. It is good to make it move relatively.
- the shear deformation step can be performed by the method of the following constitution (3) or (4).
- a line L is the boundary line
- a point B is a bending point of the bending portion.
- the angle is preferably 40 ° or more and 50 ° or less, and more preferably 45 °.
- the cross-sectional shape and size of the portion that becomes the vertical wall portion change to a bent portion (a boundary portion between the vertical wall portion, the top plate portion, and the flange portion). Since it is hard to change except a part, an expansion
- the cross-sectional shape and dimensions of the portion 12a that becomes the vertical wall portion change in the shear deformation step.
- the angle to 30 ° or more and 60 ° or less, the vertical wall portion
- the shrinkage that occurs is not so great as to cause wrinkles, and even if wrinkles occur in the vertical wall portion, the wrinkles can be removed by post-processing.
- the angle is less than 30 °, when the vertical wall portion is formed only by the shear deformation step, the degree of elimination of deformation of the portion that becomes the vertical wall portion (the material is bent excessively) becomes insufficient. If wrinkles remain on the vertical wall, the wrinkles may not be removed by post-processing. When the angle exceeds 60 °, the material of the portion that becomes the vertical wall portion is greatly stretched (the direction of elongation is different from the direction of shear deformation), and cracking due to insufficient ductility of the material may occur. .
- the method according to this aspect can be performed in combination with the shear deformation step and the conventional draw forming step and foam forming step as in the following configurations (5) to (7).
- the drawing step is performed after the shear deformation step.
- the shear deformation step is performed after the drawing forming step.
- the curved channel part does not have a flange portion outside the vertical wall portion, and the foam forming step is performed after the shear deformation step as the step of forming the vertical wall portion.
- a curved press is formed as compared with the case where the vertical wall portion is formed only by the drawing process.
- the shrinkage flange deformation of the molded part is alleviated.
- the outer part 12b of the deformed part exists in a flange shape on the outside of the vertical wall part. Therefore, in the method of this aspect, the flange part is provided on the outer side of the vertical wall part. Post-processing is required when producing a non-curved channel part.
- the foam forming process is performed without removing the outer portion 12b.
- the shrinkage flange deformation of the curved press-molded part is alleviated.
- the press-formed part is curved as compared with the case where the vertical wall section is formed only by the foam-molding process. The shrinkage flange deformation is reduced.
- the method according to this aspect can have the following configuration (8) or (9).
- (8) It has a wrinkle extending step of extending the wrinkles generated in the vertical wall portion by sandwiching the vertical wall portion after the shear deformation step with a mold. At this time, if unevenness for increasing the line length of the vertical wall portion is formed on the press surface of the mold that comes into contact with the vertical wall portion, wrinkles of the vertical wall portion are further extended.
- the said shear deformation process is performed with respect to the blank heated at 300 degreeC or more and 1000 degrees C or less. Preferably it is 400 degreeC or more and 900 degrees C or less.
- the material of the blank used by the method of this aspect may be any blank material used in known press molding. For example, even for blanks that are difficult to press form by conventional methods, such as high-strength steel plates of 590 MPa or higher, and aluminum alloy plates, curved channel parts in which shrinkage flange deformation is suppressed by performing this method. The parts can be obtained.
- the base portion of the blank and the outer portion of the deformation portion are separately restrained in the shear deformation step.
- a conventionally known method can be adopted as the restraining method. For example, there are a method of fixing a blank with a jig, a method of providing a projection on a mold and hooking the blank, a method of fixing the blank with a magnetic force, and these methods are used alone or in combination.
- a method of providing a screw such as a bolt on a jig that sandwiches the blank In this method, a force for fastening the blank with the jig can be applied by a fastening force of the screw.
- a bead portion is provided in a jig that sandwiches a blank, and in this method, bending / unbending deformation and frictional resistance that the material undergoes when moving the bead portion can be used as a restraint force for material movement.
- a concavo-convex shape is formed by knurling (knurling) on a jig that is fixed with a blank interposed therebetween.
- the concavo-convex shape bites into the blank, so that the movement of the material can be easily prevented.
- a method of knurling there are a cutting method and a method of transferring the concavo-convex shape by strongly pressing it against the jig, but any method may be used as long as the concavo-convex shape is imparted to the jig.
- Hardening methods include induction hardening, carburizing quenching, flame quenching, laser quenching and other quenching treatments, low temperature sulfurization treatment, chemical vapor deposition and physical vapor deposition surface modification methods. Can be mentioned.
- this embodiment when press-molding a press-molded part having a curved portion in the vertical wall portion, it is possible to suppress shrinkage flange deformation that occurs in at least the vertical wall portion of the vertical wall portion and the flange portion. That is, it is possible to prevent wrinkles due to shrinkage and flange deformation in a press-molded part having a curved portion in the vertical wall portion.
- the shear deformation process can be stably performed even when there are various fluctuations during mass production, and thus can contribute to a reduction in the defective rate of the pressed product. Since this embodiment can be applied to materials that are difficult to press-form, such as high-strength steel plates of 590 MPa or higher, and aluminum alloy plates, various shapes of press-formed products can be manufactured. Can contribute to the improvement of strength and strength.
- the curved channel component 2 includes a top plate portion 21 corresponding to a base portion, a vertical wall portion 22 having a curved portion 22 a, and a flange portion 24 continuous with the vertical wall portion 22.
- the flange portion 24 has a curved portion 24 a at a portion continuous with the curved portion 22 a of the vertical wall portion 22.
- the vertical wall portion 22 having the curved portion 22a of the curved channel component 2 and the flange portion 24 continuous thereto are formed by the following method.
- portions other than the curved portion 22a may be formed by a normal drawing process.
- the metal mold used in the press molding includes a punch 31 disposed below the blank 1 constituting the plate-shaped workpiece, and a first disposed above the punch 31 across the blank 1. It has a pad 32, a wrinkle presser 33 arranged with a space S 0 beside the punch 31, and a second pad 34 arranged above the wrinkle presser 33 with the blank 1 in between.
- the separation distance S0 between the punch 31 and the second pad 34 is preferably the same as the height of the vertical wall portion 22 of the curved channel component 2 to be manufactured.
- the deformed portion 12 is A portion 12a to be the vertical wall portion 22 is included.
- the deformable portion 12 in order to produce the curved channel component 2 having the flange portion 24, includes a portion 12 b that becomes the flange portion 24.
- the outer portion 12b of the portion 12 (the portion that becomes the flange portion) 12b is sandwiched and restrained by the wrinkle presser 33 and the second pad 34.
- the central portion 11b of the base portion 11 may or may not be restrained. In this state, the punch 31 and the first pad 32, and the wrinkle presser 33 and the second pad 34 are separated from each other by a separation distance S0 when viewed from the thickness direction of the blank 1.
- the punch 31 and the first pad 32 constitute a first restraining portion
- the wrinkle presser 33 and the second pad 34 constitute a second restraining portion.
- the portion 12 a serving as the vertical wall portion has a point B (bending point of the curved portion 22 a of the vertical wall portion 22) B on the boundary line with the boundary side portion 11 a as indicated by an arrow A.
- the wrinkle presser 33 and the second pad 34 that restrain the outer portion 12b so as to rotate toward the center are swung relatively downward and approach the punch 31 and the first pad 32. Move along. This corresponds to a shear deformation process.
- the portion 12a that becomes the vertical wall portion of the blank 1 is bent at the boundary between the boundary side portion 11a and the outer portion 12b to become the vertical wall portion 22 of the curved channel component 2.
- the blank 1 has an in-plane surface of the portion 12 a that becomes the vertical wall portion of the deformation portion 12 in accordance with the movement of the outer portion 12 b indicated by the arrow Y. Shear deformation occurs, and a material flow indicated by an arrow X occurs at the outer edge portion of the portion 12a that becomes the vertical wall portion. For this reason, the curved channel component 2 manufactured in this embodiment is less likely to shrink and flange deformation at the outer edge of the curved portion 22a of the vertical wall portion 22.
- the portion 12a that becomes the vertical wall portion of the blank 1 does not change the cross-sectional shape and dimensions at the portion other than the bent portion, and thus the vertical wall of the curved channel component 2
- the portion 22 is less likely to wrinkle.
- the outer portion 12b moves while being constrained to become the flange portion 24, the outer edge portion of the curved portion 24a of the flange portion 24 is also less likely to shrink and the flange portion 24 is less likely to be wrinkled.
- the curved channel component 2 having the shape shown in FIG. 3 is produced.
- the vertical wall part 22 with the curved part 22a of the curved channel component 2, and the flange part 24 following this are formed with the following method shown in FIG.
- the method of this embodiment is different from the method of the first embodiment in the method of moving the wrinkle presser 33 and the second pad 34 that restrains the outer portion 12b, and is otherwise the same as the method of the first embodiment. is there.
- the boundary portion 11 a of the base portion 11 of the blank 1 is sandwiched and restrained by the punch 31 and the first pad 32, and the outer portion of the deformable portion 12 (the portion that becomes the flange portion). ) 12b is sandwiched and restrained by the wrinkle presser 33 and the second pad 34.
- the wrinkle presser 33 and the second pad 34 that restrain the outer portion 12b are brought closer to the punch 31 and the first pad 32 as viewed from the thickness direction of the blank. Move straight down diagonally.
- the wrinkle presser 33 and the second pad 34 are linearly moved in an oblique direction in which the angle ( ⁇ ) with respect to the plate surface of the blank 1 is an angle in the range of 30 ° to 60 °.
- the constrained outer portion 12b moves linearly in the direction of the angle ⁇ selected from the range of 30 ° to 60 °. This corresponds to a shear deformation process.
- the portion 12a which becomes the vertical wall portion of the blank 1 is not only bent at the boundary between the boundary side portion 11a and the outer portion 12b as shown by a two-dot chain line in FIG. It extends after being deformed in the shrinking direction, and finally becomes the vertical wall portion 22 of the curved channel part 2.
- the vicinity of the boundary with the outer portion 12b of the portion 12a serving as the vertical wall portion moves along the arrow A in FIG. 6 while being bent.
- the blank 1 has an in-plane surface of the portion 12 a that becomes the vertical wall portion of the deformation portion 12 in accordance with the movement of the outer portion 12 b indicated by the arrow Y.
- Shear deformation occurs, and a material flow indicated by an arrow X occurs at the outer edge portion of the portion 12a that becomes the vertical wall portion.
- the shear deformation direction is a direction perpendicular to the paper surface.
- the curved channel component 2 manufactured in this embodiment is less likely to shrink and flange deformation at the outer edge of the curved portion 22a of the vertical wall portion 22.
- the movement angle ( ⁇ ) of the outer portion 12b with respect to the plate surface of the blank 1 is not 45 °, the possibility that the vertical wall portion 22 is wrinkled is higher than that in the case where ⁇ is 45 °.
- ⁇ is 30 ° or more and 60 ° or less, generation of wrinkles due to shrinkage occurring in the vertical wall portion 22 can be avoided, and even if wrinkles occur in the vertical wall portion 22, the wrinkles are small that can be removed by post-processing or the like. It is confirmed that it will be something.
- the outer edge portion of the curved portion 24a of the flange portion 24 is also less likely to shrink and the flange portion 24 is less likely to wrinkle.
- the portion 12a that becomes the vertical wall portion in the state of FIG. The generated wrinkles can be stretched by being sandwiched between the side surface of the punch 31 and the side surface of the second pad 34.
- the curved channel component 2 having the shape shown in FIG. 3 is produced.
- the vertical wall part 22 with the curved part 22a of the curved channel component 2, and the flange part 24 following this are formed with the following method shown in FIG.
- the mold used for press molding is basically the same as that shown in FIG. 4, but as shown in FIG. 7, the blank 1 has a convex portion 35 a on the side surface (press surface contacting the vertical wall portion).
- a punch 35 is disposed.
- a second pad 36 having a recess 36 a on the side surface is disposed above the wrinkle presser 33. The rest is the same as in the second embodiment.
- the angle ( ⁇ ) with respect to the plate surface of the blank 1 is 30 ° to 30%, as indicated by an arrow C. It is linearly moved diagonally downward at 60 °. Along with this, shear deformation occurs in the plate surface of the portion 12a that becomes the vertical wall portion of the blank 1, and the cross-sectional shape of the portion 12a that becomes the vertical wall portion of the blank 1 is as shown by a two-dot chain line in FIG. Change. During this time, the portion near the boundary with the outer portion 12b of the portion 12a serving as the vertical wall portion moves along the arrow A in FIG. 7 while bending.
- the part 12f of the portion 12a that becomes the vertical wall portion is finally sandwiched between the convex portion 35a of the punch 35 and the concave portion 36a of the second pad 36.
- the surface is substantially perpendicular to the surface of the flange portion 24.
- This process is a wrinkle stretching process.
- the vertical wall portion is sandwiched between the molds, the wrinkle is easily stretched even if the vertical wall portion is wrinkled.
- the line length of the portion 12a that becomes the vertical wall portion is increased by an amount corresponding to the recess 36a, that is, the line length can be increased.
- This wrinkle stretching process may be performed finally after the shear deformation process described in the first embodiment and the like. By performing the wrinkle stretching process continuously after the shear deformation process, the number of processes is not increased for the wrinkle stretching process.
- the curved channel component 2 having the shape shown in FIG. 3 is produced.
- the vertical wall part 22 with the curved part 22a of the curved channel component 2, and the flange part 24 following this are formed with the following method shown in FIG.
- the vertical wall portion 22 is formed in two processes in which a drawing process is performed after a shear deformation process. Therefore, a part of the portion that becomes the vertical wall portion 22 is included in the outer portion 12b restrained in the shear deformation step.
- the inner portion (portion on the base 11 side) 12c of the portion that becomes the vertical wall portion 22 is subjected to shear deformation within the plate surface.
- the mold used in the shear deformation step is basically the same as that of the second embodiment, but as shown in FIG. 8A, a separation distance S0 between the punch 31 and the second pad 34 is produced.
- the value is increased or decreased by a margin set in advance to half or half of the height T2 (see FIG. 8B) of the vertical wall portion 22 of the curved channel part 2.
- the boundary portion 11a of the base 11 of the blank 1 is sandwiched and restrained by the punch 31 and the first pad 32, and the outer portion of the deformable portion 12 (part of the portion that becomes the vertical wall portion 22 and the flange portion 24).
- the portion 12b is sandwiched between the wrinkle presser 33 and the second pad 34 and restrained.
- the wrinkle presser 33 and the second pad 36 that restrain the outer portion 12b are connected to the plate surface of the blank 1 as shown by an arrow C in FIG. Is linearly moved in a direction that makes the angle ( ⁇ ) with respect to the angle in the range of 30 ° to 60 °.
- the constrained outer portion 12b moves linearly in the direction of the angle ⁇ selected from the range of 30 ° to 60 °, and shear deformation occurs in the plate surface of the inner portion 12c of the blank 1. This corresponds to a shear deformation process.
- This shear deformation process is performed until the angle between the boundary side portion 11a of the base portion 11 and the inner portion 12c of the deformation portion 12 reaches the angle of the final product.
- a die 37 is installed in place of the second pad 34 constraining the outer portion 12b, and the die 37 and the wrinkle presser 33 are moved along the arrow B.
- the drawing process is performed at As a result, the outer portion 12b is stretched while being pulled out toward the punch 31, and the inner portion 12c is also stretched to form the vertical wall portion 22.
- the curved channel component 2 having the shape shown in FIG. 3 is produced.
- the vertical wall part 22 with the curved part 22a of the curved channel component 2, and the flange part 24 following this are formed with the following method shown in FIG.
- the vertical wall portion 22 is formed in two steps in which a shear deformation step is performed after the drawing step.
- the boundary side portion 11a of the base portion 11 of the blank 1 is sandwiched and restrained by the punch 31 and the first pad 32, and the outer portion 12d (vertical wall portion) of the deformable portion 12 is obtained.
- a portion of the portion 12 a that becomes 22 and a portion that becomes the flange portion 24) are sandwiched between the die 37 and the wrinkle presser 33.
- the inner portion 12c of the deformable portion 12 of the blank 1 exists in an unconstrained state.
- the drawing process is performed by moving the die 37 and the wrinkle presser 33 along the arrow B in a state where a predetermined tension is applied to the outer portion 12d.
- the outer portion 12d is bent while being drawn out and extended toward the punch 31, and the blank 1 has a shape having a bent portion between the portion 12a serving as the vertical wall portion and the outer portion 12b.
- This drawing process is performed until the angle ⁇ between the vertical wall portion 12a and the side surface of the die 37 becomes, for example, an angle in the range of 45 ° to 60 °.
- the outer portion 12 b is restrained by the wrinkle presser 33 and the second pad 34, and the wrinkle presser 33 and the second pad 34 are angled ( ⁇ ) with respect to the plate surface of the blank 1. Is linearly moved in a direction that makes an angle in the range of 30 ° to 60 °.
- the constrained outer portion 12b moves linearly in the direction of the angle ⁇ selected from the range of 30 ° to 60 °.
- shear deformation occurs in the plate surface of the portion 12a that becomes the vertical wall portion of the blank 1, and the vertical wall portion 22 and the flange portion 24 are formed. This corresponds to a shear deformation process.
- the curved channel component 4 includes a top plate portion 41 and a vertical wall portion 42 having a curved portion 42a.
- the vertical wall portion 42 is formed in two stages, a shear deformation process and a foam molding process.
- the basic configuration of the mold used in the shear deformation process is the same as that of the second embodiment.
- the boundary side portion 11a of the base portion 11 of the blank 1 is sandwiched and restrained by the punch 31 and the first pad 32, and the outer portion of the deformable portion 12 (transient flange)
- the portion 12b is sandwiched between the wrinkle presser 33 and the second pad 34 and restrained.
- the punch 31 and the first pad 32 and the wrinkle presser 33 and the second pad 34 are separated by a distance S0 when viewed from the thickness direction of the blank 1. Yes.
- the wrinkle presser 33 and the second pad 34 constraining the outer portion 12b are rotated around the boundary point B between the portion 12a serving as the vertical wall portion and the boundary side portion 11a as indicated by an arrow A. Move to do. This corresponds to a shear deformation process. This movement is stopped at a position where the portion 12a serving as the vertical wall portion is bent by a predetermined angle ⁇ . In this state, the portion 12a which becomes the vertical wall portion is an inclined wall portion, and the outer portion 12b is a flange portion.
- the predetermined angle ⁇ is less than 20 °, shear deformation occurs. Therefore, the effect of suppressing the occurrence of stretch flange deformation is reduced.
- the predetermined angle ⁇ exceeds 70 °, the shear wall is sufficiently generated only by the shear deformation process for forming the vertical wall. Therefore, it is not necessary to perform the molding separately in the two processes of the shear deformation process and the foam molding process.
- the die is placed on the portion 12a that becomes the vertical wall portion and the outer portion 12b. 37 is installed. Then, by moving the die 37 along the arrow B, the bent portion is extended and the vertical wall portion 42 is formed. This corresponds to the foam molding process.
- the angle ( ⁇ ) with respect to the plate surface of the blank 1 is 30 ° to 60 °, as indicated by the arrow C in FIG. You may carry out by moving linearly in the direction which becomes the angle of the range of °.
- the curved channel component shown in FIG. 10 can be produced by a method of cutting the flange portion 24 after obtaining a molded product with a flange once by the method of the first embodiment and the second embodiment.
- the curved channel component 60 is formed by bending the boundary portion between the top plate portion 61 and the vertical wall portion 62 with a curved fold line that protrudes toward the top plate portion.
- a curved portion is formed by in-plane deformation (curving) in the height direction so that 62 is convex toward the top plate portion 61 side, that is, the vertical wall portion 62 is convex toward the top plate portion 61 side. It is.
- the top plate portion 61 has a curved shape so as to be concave toward the vertical wall portion side.
- the flange portion 64 is also curved in the out-of-plane direction.
- the press molding according to the present invention for example, press molding described in the first to sixth embodiments
- wrinkles are generated due to the shrinkage flange deformation. Can be suppressed.
- the top plate part 61 is also curved, the facing surface that holds the blank of the punch 31 and the first pad 32 is set to a surface shape along the curved top plate part.
- the curved portion of the vertical wall portion is a subject of the present invention even if the curved portion is deformed in both the out-of-plane direction and the vertical direction.
- the vertical wall portion 22 of the curved channel part 2 and the flange portion 24 continuous therewith were formed as shown in FIG. Further, the curved channel component 4 shown in FIG. 10 was formed by the method described in the sixth embodiment and conventional press molding (form molding).
- the shape of the flange portion after molding is different from the methods of the first to fifth embodiments.
- the shape of the blank was changed between the methods of the first to fifth embodiments and the drawing, so that the flange width near the curved portion of the vertical wall portion was 50 mm after press forming.
- the shape of the blank for drawing was determined by inverse analysis based on the total strain theory.
- the blank was heated using a heating furnace, and the temperature of the blank before molding was measured using an infrared radiation thermometer.
- FIG. 13 (a) is a plan view of the mold and blank used
- FIG. 13 (b) is a cross-sectional view taken along the line AA.
- the curvature radius R1 of the inner peripheral surfaces of the punch 31 and the first pad 32 corresponding to the curved portion 22a is 100 mm.
- the curvature radius R2 of the outer peripheral surfaces of the wrinkle presser 33 and the second pad 34 corresponding to the curved portion 22a is 90 mm.
- the separation distance S0 between the punch 31 and the second pad 34 shown in FIG. 13B was 100 mm.
- the chamfer radius R3 of the upper end corner of the punch 31 was 10 mm
- the chamfer radius R4 of the lower end corner of the second pad 34 was 10 mm.
- the boundary portion 11a of the base 11 of the blank 1 is sandwiched and restrained by the punch 31 and the first pad 32, and the outer portion (flange) of the deformable portion 12 is fixed.
- the portion 12b is restrained by being sandwiched between the wrinkle presser 33 and the second pad 34.
- the portion 12 a serving as the vertical wall portion was rotated along the arrow A in FIG. 5. As shown in FIG. 14B, this rotation was performed until the distance S between the punch 31 and the second pad 34 was 10 mm.
- FIG. 14A is a plan view of the mold and blank in this state
- FIG. 14B is a cross-sectional view taken along the line AA.
- the height T of the vertical wall portion 22 in FIG. 14B was 100 mm.
- the shear deformation process was performed at room temperature using an unheated blank.
- the resulting curved channel parts were evaluated for wrinkles generated as shown in Table 2.
- the wrinkle was ⁇ (a fine wrinkle that does not cause a quality problem) regardless of the blank material used.
- Example No.1-2 The vertical wall portion 22 and the flange portion 24 continuous with the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 1-1 except for the following points.
- the wrinkle crushing step was performed by sandwiching the vertical wall portion 22 between the punch 31 and the second pad 34 from the state of FIG.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No. 1-3 The vertical wall portion 22 and the flange portion 24 continuous with the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 1-1 except for the following points.
- the shear deformation process was performed using a blank heated to 300 ° C.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.1-4 The vertical wall portion 22 and the flange portion 24 continuous with the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 1-1 except for the following points.
- the shear deformation process was performed using a blank heated to 300 ° C.
- the vertical wall portion 22 is further sandwiched between the punch 31 and the second pad 34 to perform the crushing process.
- the generated wrinkles were evaluated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.2-1> The vertical wall portion 22 of the curved channel component 2 shown in FIG. 3 and the flange portion 24 continuous thereto are formed only by the shear deformation step by the method of the second embodiment shown in FIG.
- the same mold as Sample No. 1-1 was used except that the moving mechanism of the wrinkle presser 33 and the second pad 34 was different.
- the separation distance S0 between the punch 31 and the second pad 34 shown in FIG. 13B was 100 mm.
- the boundary side portion 11a of the base portion 11 of the blank 1 is sandwiched and restrained by the punch 31 and the first pad 32, and the outer portion (portion serving as a flange portion) 12b of the deformable portion 12 is The two pads 34 were sandwiched and restrained.
- FIG. 14A is a plan view of the mold and blank in this state
- FIG. 14B is a cross-sectional view taken along the line AA.
- the height T of the vertical wall portion 22 in FIG. 14B was 100 mm.
- the shear deformation process was performed at room temperature using an unheated blank.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, regardless of the blank material used, the wrinkle was ⁇ (a fine wrinkle that does not cause a problem in quality).
- Example No.2-2 The vertical wall portion 22 of the curved channel part 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-1, except for the following points.
- the wrinkle crushing step was performed by sandwiching the vertical wall portion 22 between the punch 31 and the second pad 34 from the state of FIG.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.2-3 The vertical wall portion 22 of the curved channel part 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-1, except for the following points.
- the shear deformation process was performed using a blank heated to 300 ° C.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.2-4 The vertical wall portion 22 of the curved channel part 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-1, except for the following points.
- the shear deformation process was performed using a blank heated to 300 ° C.
- the vertical wall portion 22 is further sandwiched between the punch 31 and the second pad 34 to perform the crushing process.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.3-1 The vertical wall portion 22 of the curved channel part 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-1, except for the following points. As shown in FIG. 6, the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 45 °. The resulting curved channel part was evaluated for wrinkles generated based on Table 2. In sample No. 2-1, regardless of the blank material used, the wrinkle was ⁇ (a fine wrinkle that does not cause quality problems).
- Example No.3-2> The vertical wall portion 22 and the flange portion 24 continuous to the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-2 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 45 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.3-3 A vertical wall portion 22 and a flange portion 24 continuous to the vertical wall portion 22 of the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-3 except for the following points.
- the degree ( ⁇ ) was 45 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.3-4> A vertical wall portion 22 and a flange portion 24 continuous to the vertical wall portion 22 of the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-4 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 45 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.4-1 The vertical wall portion 22 of the curved channel part 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-1, except for the following points. As shown in FIG. 6, the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 60 °. The resulting curved channel part was evaluated for wrinkles generated based on Table 2. In sample No. 2-1, regardless of the blank material used, the wrinkle was ⁇ (a fine wrinkle that does not cause quality problems).
- Example No.4-2 The vertical wall portion 22 and the flange portion 24 continuous to the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-2 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 60 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.4-3 A vertical wall portion 22 and a flange portion 24 continuous to the vertical wall portion 22 of the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-3 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 60 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.4-4> A vertical wall portion 22 and a flange portion 24 continuous to the vertical wall portion 22 of the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-4 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 60 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.5-1 The vertical wall portion 22 of the curved channel part 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-1, except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 20 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
- Example No.5-2> The vertical wall portion 22 and the flange portion 24 continuous to the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-2 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 20 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
- Example No.5-3 A vertical wall portion 22 and a flange portion 24 continuous to the vertical wall portion 22 of the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-3 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 20 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
- Example No.5-4 A vertical wall portion 22 and a flange portion 24 continuous to the vertical wall portion 22 of the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-4 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 20 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
- Example No. 6-1 The vertical wall portion 22 of the curved channel part 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-1, except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 70 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
- Example No.6-2 The vertical wall portion 22 and the flange portion 24 continuous to the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-2 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 70 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
- Example No. 6-3 A vertical wall portion 22 and a flange portion 24 continuous to the vertical wall portion 22 of the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-3 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 70 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
- Example No. 6-4 A vertical wall portion 22 and a flange portion 24 continuous to the vertical wall portion 22 of the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-4 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 34 along the arrow C was set to 70 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
- Example No.7-1 The vertical wall portion 22 of the curved channel part 2 shown in FIG. 3 and the flange portion 24 continuous therewith are subjected to a two-step process in which a shear deformation step is performed after a drawing step by the method of the fifth embodiment shown in FIG. Formed.
- the mold used in the drawing process is obtained by replacing the second pad 34 with a die 37 in the mold shown in FIG.
- the chamfer radius of the lower end corner portion of the die 37 is 10 mm, which is the same as the chamfer radius R4 of the lower end corner portion of the second pad 34 of the mold shown in FIG.
- the distance L between the punch 31 and the die 37 was 87 mm.
- the boundary side portion 11 a of the base portion 11 of the blank 1 is sandwiched and restrained by the punch 31 and the first pad 32, and the outer portion 12 d of the deformed portion 12 of the blank 1.
- the outer portion 12 d of the deformed portion 12 of the blank 1. was installed between the crease presser 32 and the die 37.
- a drawing process of moving the crease presser 32 and the die 37 by 50 mm in the B direction while applying tension to the outer portion 12d was performed. This drawing process was performed until the angle ⁇ between the portion 12a serving as the vertical wall portion and the side surface of the die 37 reached 60 °. Thereby, height T1 of the part 12a used as a vertical wall part was 50 mm.
- the die 37 is replaced with the second pad 34, and the wrinkle presser 32 and the second pad 34 are connected to the same moving mechanism as used in sample No. 2-1, as shown in FIG. 9B.
- the outer portion 12 d of the deformed portion 12 of the blank 1 was restrained between the wrinkle presser 32 and the second pad 34.
- the separation distance S0 between the punch 31 and the second pad 34 was 87 mm.
- the wrinkle presser 33 and the second pad 34 were linearly moved along the arrow C, with the angle ⁇ with respect to the plate surface of the portion 12a serving as the vertical wall portion of the blank 1 being 60 °. This movement was performed until the distance S between the punch 31 and the second pad 34 became 10 mm.
- the vertical wall portion 22 was formed by shearing and deforming the portion 12a serving as the vertical wall portion.
- the height T2 of the vertical wall portion 22 in FIG. 9B was 100 mm.
- the shear deformation process was performed at room temperature using an unheated blank.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2.
- the wrinkle was ⁇ (a fine wrinkle that does not cause a quality problem) regardless of the blank material used.
- Example No.7-2 A vertical wall portion 22 and a flange portion 24 continuous with the vertical wall portion 22 of the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 7-1 except for the following points.
- the wrinkle crushing process was performed by sandwiching the vertical wall portion 22 between the punch 31 and the second pad 34 from the state of FIG. 9B.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.7-3 A vertical wall portion 22 and a flange portion 24 continuous with the vertical wall portion 22 of the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 7-1 except for the following points.
- the shear deformation process was performed using a blank heated to 300 ° C.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.7-4> A vertical wall portion 22 and a flange portion 24 continuous with the vertical wall portion 22 of the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 7-1 except for the following points.
- the shear deformation process was performed using a blank heated to 300 ° C.
- the vertical wall portion 22 is further sandwiched between the punch 31 and the second pad 34 to perform the crushing process.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No. 8-1 The vertical wall portion 22 of the curved channel part 2 shown in FIG. 3 and the flange portion 24 continuous therewith are subjected to a two-step process in which a drawing process is performed after a shear deformation process is performed by the method of the fourth embodiment shown in FIG. Formed.
- the shear deformation process the same mold as that used in Sample No. 2-1 was used, and the separation distance S0 between the punch 31 and the second pad 34 was set to 50 mm.
- the boundary side portion 11a of the base 11 of the blank 1 is sandwiched and restrained by the punch 31 and the first pad 32, and the outer portion of the deformed portion 12 (becomes a flange portion).
- the second pad 34 is replaced with a die 37, and the die 37 and the wrinkle presser 33 are connected to a drawing forming moving mechanism, and the die 37 and the wrinkle presser 33 are interposed between them.
- the outer part 12b of the blank 1 was installed.
- a drawing process of moving the die 37 and the crease presser 33 by 50 mm in the B direction while applying tension to the outer portion 12b was performed. This drawing process was performed until the height T2 of the vertical wall portion 22 reached 100 mm.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, for sample No. 8-1, regardless of the blank material used, the wrinkle was ⁇ (a fine wrinkle that would not cause a quality problem).
- Example No.8-2 The vertical wall portion 22 of the curved channel component 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 8-1 except for the following points.
- the wrinkle crushing process was performed by sandwiching the vertical wall portion 22 between the punch 31 and the second pad 34 from the state of FIG.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No. 8-3 The vertical wall portion 22 of the curved channel component 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 8-1 except for the following points.
- the shear deformation process was performed using a blank heated to 300 ° C.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.8-4> The vertical wall portion 22 of the curved channel component 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 8-1 except for the following points.
- the shear deformation process was performed using a blank heated to 300 ° C.
- the vertical wall portion 22 is further sandwiched between the punch 31 and the second pad 34 to perform the wrinkle crushing process.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- FIG. 15A is a plan view of the mold and blank used
- FIG. 15B is a cross-sectional view taken along the line AA.
- the mold used in the press molding is the same as a conventional drawing mold, and includes a die 51, a punch 52, and a wrinkle presser 53.
- a radius of curvature R1 of a portion corresponding to the curved portion 22a of the inner peripheral surface 51a of the concave portion of the die 51 is 100 mm.
- the depth F of the concave portion of the die 51 is 100 mm.
- the radius of curvature R2 of the portion corresponding to the curved portion 22a of the outer peripheral surface 52a of the punch 52 is 90 mm.
- the distance K between the inner peripheral surface 51a of the die 51 and the outer peripheral surface 52a of the punch 52 was 10 mm.
- the chamfer radius R3 of the upper end corner of the punch 52 was 10 mm, and the chamfer radius R4 of the lower end corner of the inner peripheral surface 51a of the die 51 was 10 mm.
- wrinkle pressers 53 were disposed on both sides of the punch 52, and the blank 1 was disposed thereon.
- the base 11 of the blank 1 was placed on the punch 52, and the deformed portion 12 was placed on the wrinkle presser 53.
- the die 51 was installed above the blank 1 and the die 51 was lowered. At that time, an appropriate tension was applied to the convex portion 51 b of the die 51 and the deformed portion 12 of the blank 1 pressed by the wrinkle presser 53. This drawing process was performed at room temperature.
- the deformed portion 12 of the blank 1 is bent between the concave portion of the die 51 and the punch 52, and as shown by the arrow B, between the convex portion 51 b of the die 51 and the wrinkle presser 53. Is moved to the punch 52 side, and the material largely drawn between the punch 52 and the die 51 forms the vertical wall portion 22. By performing this drawing process, the curved channel part 2 in which the height T of the vertical wall portion 22 is 100 mm was obtained.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2.
- the blank material used was “270” and “aluminum alloy”: ⁇ (a fine wrinkle that does not cause quality problems), otherwise x (a remarkable wrinkle). there were. That is, in this example, when a high-strength 590, 980, 1180 MPa class steel plate was used as a blank, remarkable wrinkles occurred in the vertical wall portion and cracks occurred in the flange portion.
- Example No. 9-2 A vertical wall portion 22 and a flange portion 24 continuous to the vertical wall portion 22 of the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 9-1 except for the following points.
- the drawing process was performed using a blank heated to 300 ° C.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2.
- wrinkles were evaluated as x (prominent wrinkles) when the blank material used was “980” and “1180”, and ⁇ (small wrinkles that would not cause quality problems) in other cases. It was.
- the curved channel component 4 shown in FIG. 10 was formed in two steps by performing a foam molding step after performing a shear deformation step by the method of the sixth embodiment shown in FIG.
- the same mold as that used in Sample No. 2-1 was used, and the separation distance S0 between the punch 31 and the second pad 34 was set to 50 mm.
- the boundary side portion 11 a of the base portion 11 of the blank 1 is sandwiched and restrained by the punch 31 and the first pad 32, and becomes an outer portion (a flange portion) of the deformable portion 12.
- Part 12 b was sandwiched and restrained by the wrinkle presser 33 and the second pad 34.
- the portion 12a which becomes the vertical wall portion is an inclined wall portion
- the outer portion 12b is a flange portion.
- This shear deformation process was performed at room temperature using an unheated blank until the height T1 of the inclined wall portion was 25 mm.
- the wrinkle presser 33 and the second pad 34 that restrain the outer portion 12b are removed, and the portion (inclined wall portion) 12a that becomes the vertical wall portion of the blank 1 and A die 37 was installed on the outer portion (flange portion) 12b.
- the foam forming process was performed by moving the die 37 along the arrow B.
- the bent part of the part 12b and the inclined wall part 12a which became the flange part transiently was extended, and the vertical wall part 42 was formed.
- the height T2 of the vertical wall portion 42 in FIG. 11B was 100 mm.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, regardless of the blank material used, the wrinkle was ⁇ (a fine wrinkle that does not cause a problem in quality).
- Example No. 10-2 A curved channel component 4 shown in FIG. 10 was produced by the same method as Sample No. 10-1, except for the following points.
- the wrinkle crushing process was performed by sandwiching the vertical wall portion 42 between the punch 31 and the die 37 from the state of FIG.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2.
- the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No. 10-3 A curved channel component 4 shown in FIG. 10 was produced by the same method as Sample No. 10-1, except for the following points.
- the shear deformation process was performed using a blank heated to 300 ° C.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No. 10-4> A curved channel component 4 shown in FIG. 10 was produced by the same method as Sample No. 10-1, except for the following points.
- the shear deformation process was performed using a blank heated to 300 ° C.
- the wrinkle crushing step was performed by sandwiching the vertical wall portion 42 between the punch 31 and the die 37.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No. 11-1 The curved channel component 4 shown in FIG. 10 was produced only by foam molding. A mold obtained by removing the wrinkle presser 53 from the mold shown in FIG. 15 used in sample No. 9-1 is used, and the base 11 of the blank 1 is placed on the punch 52, and then the die 51 is placed above the blank 1. The vertical wall portion 42 was formed by bending the deformed portion 12 of the blank 1 by lowering the die 51.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2.
- the blank material used was “270” and “aluminum alloy”: ⁇ (a fine wrinkle that does not cause quality problems), otherwise x (a remarkable wrinkle). there were. That is, in this example, when a 270 MPa grade steel plate was used as a blank, there was no problem in wrinkle evaluation, but necking occurred at the end of the vertical wall portion. When a high-strength 590, 980, 1180 MPa grade steel plate was used as a blank, wrinkles occurred in the vertical wall portion.
- the foam molding process was performed using a blank heated to 300 ° C.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2.
- the wrinkle was x (remarkable wrinkle) when the material of the blank used was “980” or “1180”, and it was ⁇ (small wrinkle that would not cause quality problems) in other cases. .
- Example No.12-1 The vertical wall portion 22 of the curved channel part 2 and the flange portion 24 continuous with the curved channel component 2 shown in FIG. 3 were produced by the same method as Sample No. 2-1, except for the following points. As shown in FIG. 7, the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 36 along the arrow C was set to 45 °. The resulting curved channel part was evaluated for wrinkles generated based on Table 2. In sample No. 10-1, regardless of the blank material used, the wrinkle was ⁇ (no wrinkle by visual inspection).
- Example No.12-2 The vertical wall portion 22 and the flange portion 24 continuous to the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-2 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 36 along the arrow C was set to 45 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No.12-3> A vertical wall portion 22 and a flange portion 24 continuous to the vertical wall portion 22 of the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-3 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 36 along the arrow C was set to 45 °.
- the generated cracks and wrinkles were evaluated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No. 12-4> A vertical wall portion 22 and a flange portion 24 continuous with the vertical wall portion 22 of the curved channel part 2 shown in FIG. 3 were produced by the same method as Sample No. 2-4 except for the following points.
- the angle ( ⁇ ) for linearly moving the wrinkle presser 33 and the second pad 36 along the arrow C was set to 45 °.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- the vertical wall portion 42 of the curved channel part shown in FIG. 10 was formed by two methods of performing a foam forming step after performing a shear deformation step by the method of the sixth embodiment shown in FIG.
- the same mold as that used in Sample No. 2-1 was used, and the separation distance S0 (see FIG. 8A) between the punch 31 and the second pad 34 was set to 50 mm.
- the boundary side portion 11a of the base 11 of the blank 1 is sandwiched and restrained by the punch 31 and the first pad 32, and the outer portion of the deformed portion 12 (becomes a flange portion).
- the second pad 34 and the wrinkle retainer 33 that restrain the outer portion 12b are removed, and the die is placed on the portion 12a that becomes the vertical wall portion and the outer portion 12b. 37 was installed.
- a foam forming process was performed in which the die 37 was moved along the arrow B to extend the bent portion and form the vertical wall portion 42. This foam molding process was performed until the height T2 of the vertical wall portion 22 reached 100 mm.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, regardless of the blank material used, the wrinkle was ⁇ (a fine wrinkle that does not cause a problem in quality).
- Example No. 13-2 The vertical wall part 42 of the curved channel part shown in FIG. It was produced by the same method.
- the wrinkle crushing process was performed by sandwiching the vertical wall portion 22 between the punch 31 and the die 37 from the state of FIG.
- the resulting curved channel part was evaluated for wrinkles generated based on Table 2.
- the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No. 13-3 The vertical wall part 42 of the curved channel part shown in FIG. It was produced by the same method. In this example, the shear deformation process was performed using a blank heated to 300 ° C. The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was ⁇ (no wrinkles by visual inspection) regardless of the blank material used.
- Example No. 13-4> The vertical wall part 42 of the curved channel part shown in FIG. It was produced by the same method. In this example, the shear deformation process was performed using a blank heated to 300 ° C. Further, from the state of FIG. 11 (b), the wrinkle crushing step was performed by sandwiching the vertical wall portion 42 between the punch 31 and the die 37.
- Tables 3 to 5 summarizes the results of No. 1-1 to No. 9-2 in which curved channel parts having flange portions were produced.
- Table 4 summarizes the results of No. 10-1 to No. 11-2 in which curved channel parts having no flange portion were produced.
- Table 5 summarizes the results of No.12-1 to No.13-4.
- the angle ( ⁇ ) of the restrained outer portion with respect to the blank plate surface is 20 ° or 70 ° (30 A method of linearly moving in a direction that deviates from the range of 60 ° to 60 ° is employed. Therefore, wrinkles generated in the vertical wall during the shear deformation process are removed even if the blank is heated and / or crushed (No. 5-2 to 5-4, No. 6-2 to 6-4). could not.
- the vertical wall portion is not formed only by the shear deformation force, but the vertical wall portion is formed by allowing the material to flow by applying an appropriate tension to the portion to be the vertical wall portion. It is possible to obtain a curved channel part in which wrinkle is improved by suppressing flange deformation and wrinkles are improved.
- the blank was heated to 300 ° C. ⁇ Sample Nos. 1-3, 1-4, 2-3, 2-4, 3-3, 3-4, 4-3,4-4, 7-3, 7-4, 8-3, 8-
- the heating temperatures were 600 ° C., 700 ° C., 900 ° C., and 1000 ° C., respectively.
- the same results as described above were obtained.
- the curved channel parts obtained by heating the blank to 1100 ° C. and performing the shear deformation process were superior to the conventional method in the evaluation of wrinkles, but the surface of the molded product was made of iron called scale. A thick oxide film was formed. Since a thick scale hinders welding and electrodeposition coating, it requires removal steps such as pickling, polishing, and shot blasting, which is not preferable from the viewpoint of manufacturing cost.
- Blank 11 Blank base part 11a Boundary side part of base part 11b Central part of base part 12 Blank deformed part 12a Part to be deformed part vertical wall part 12b Outer part of deformed part 2 Curved channel part 21 Top plate part 22 Vertical wall part 22a Curved portion of vertical wall portion 24 Flange portion 24a Curved portion of flange portion 4 Curved channel component 41 Top plate portion 42 Vertical wall portion 42a Curved portion of vertical wall portion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
自動車用のプレス成形品には、縦壁部に湾曲部を有する湾曲チャンネル部品(図10に示すロアアーム部品など)や、フランジ部を有する湾曲チャンネル部品(図3に示す部品など)もある。また、縦壁部の湾曲に伴い天板部などにも湾曲部を有する部品形状(図12に示す部品形状など)もある。 As a method of adjusting the tension, there are a method of changing the force (cushion pressure) for pressing the blank between the die and the wrinkle press, and a method of installing a bead portion at the press position. If the tension applied to the blank is too weak, the material inflow into the vertical wall becomes excessive and wrinkles (remaining meat) are likely to occur.
The press-formed product for automobiles includes a curved channel part (such as a lower arm part shown in FIG. 10) having a curved part on a vertical wall part and a curved channel part (such as a part shown in FIG. 3) having a flange part. In addition, there is a part shape (such as the part shape shown in FIG. 12) having a curved portion in the top plate portion or the like as the vertical wall portion is curved.
この縮みフランジ変形に起因したしわは、特に高強度の鋼板などの降伏強度が高い材料で問題となっている。また、鋼板以外の材料であっても、降伏強度が高い材料であれば縮みフランジ変形に起因したしわが発生し得る。
これに対する技術としては、特許文献1,2に記載された技術がある。特許文献1,2では、この縮みフランジ変形を防ぐために、縦壁部やフランジ部のエッジを引っ張る方法が提案されている。 Similarly, when a curved channel part having a flange portion is manufactured by drawing, wrinkles due to shrinkage flange deformation may occur due to the flange portion being compressed in the circumferential direction of the curved portion. is there.
The wrinkles caused by the shrinkage flange deformation are a problem particularly in materials with high yield strength such as high-strength steel sheets. Moreover, even if it is materials other than a steel plate, if it is a material with high yield strength, a wrinkle resulting from shrinkage flange deformation | transformation may generate | occur | produce.
As techniques for this, there are techniques described in
この発明の目的は、縦壁部に湾曲部を有する湾曲チャンネル部品などのプレス成形部品をプレス成形により作製する方法であって、縦壁部およびフランジ部に生じる縮みフランジ変形を抑制できる技術を提供することである。 The methods proposed in
An object of the present invention is a method for producing a press-molded part such as a curved channel part having a curved part on a vertical wall part by press molding, and provides a technique capable of suppressing shrinkage flange deformation generated in the vertical wall part and the flange part. It is to be.
但し、本発明は、以下の実施形態及び実施例に限定されない。下記の各実施形態では、作製対象とするプレス成形部品として湾曲チャンネル部品を例に挙げて説明するが、湾曲チャンネル部品に限定されない。縦壁部が、成形の際に、天板部側へ凸状に湾曲する湾曲部を持ったプレス成形部品であれば対象となる。図3の形状では、天板部と縦壁部との境界部を曲線状の折曲げ線(境界線)で折り曲げる際に、縦壁部22が天板部21側に凸となるように、つまり縦壁部22が天板部21に対し張り出す方向へ面外変形(湾曲)して湾曲部が形成される例である。 Embodiments of the present invention will be described below with reference to the drawings.
However, the present invention is not limited to the following embodiments and examples. In the following embodiments, a curved channel part will be described as an example of a press-molded part to be manufactured, but the present invention is not limited to a curved channel part. If the vertical wall portion is a press-molded part having a curved portion that curves in a convex shape toward the top plate portion during molding, it is a target. In the shape of FIG. 3, when the boundary portion between the top plate portion and the vertical wall portion is bent along a curved fold line (boundary line), the
この態様の方法によれば、図1(b)に示すように、前記剪断変形工程において、前記縦壁部となる部分12aの外縁部に矢印Xで示す(前記湾曲部から、当該湾曲部から離れた部分に向かう)材料の流れが生じるため、前記湾曲部の外縁部に縮みフランジ変形が生じにくくなる。 As shown in FIG. 2, the shear deformation is a form in which a rectangular ABCD is deformed into a parallelogram ABC1D1 when receiving forces (shearing forces) parallel to and opposite to each other in the AB direction and the DC direction. is there.
According to the method of this aspect, as shown in FIG. 1B, in the shear deformation step, the outer edge portion of the
また、前記剪断変形工程において、前記外方部12bおよび前記境界側の部分11aは拘束されているため、材料の移動ができず、前記縦壁部となる部分12aは板面内で剪断変形させられる。そのため、前記剪断変形工程は、金型の表面粗さやクリアランス、クッション力、ブランクの強度や伸び、板厚などが量産製造中に変動しても、安定して行うことができる。 In the shear deformation step, the
In the shear deformation step, the
(3)前記拘束された外方部を、前記縦壁部となる部分が、前記基部と前記変形部との境界線上の前記湾曲部の屈曲点を中心に回転するように移動させる方法。図1(a)において、ラインLが前記境界線であり、点Bが前記湾曲部の屈曲点である。 In the method of this aspect, the shear deformation step can be performed by the method of the following constitution (3) or (4).
(3) A method of moving the constrained outer portion so that a portion that becomes the vertical wall portion rotates around a bending point of the bending portion on a boundary line between the base portion and the deformation portion. In FIG. 1A, a line L is the boundary line, and a point B is a bending point of the bending portion.
前記構成(3)の方法では、前記剪断変形工程において、前記縦壁部となる部分の断面形状および寸法が、屈曲部(縦壁部と天板部およびフランジ部との境界部)に変化する部分以外で変化しにくいため、前記縦壁部に伸びやしわが生じにくい。
前記構成(4)の方法では、前記剪断変形工程において前記縦壁部となる部分12aの断面形状および寸法が変化するが、前記角度を30°以上60°以下とすることにより、前記縦壁部に生じる縮みはしわの発生に至るほどは大きくなく、前記縦壁部にしわが生じても、そのしわは後加工で除去可能な状態にすることができる。 (4) A method of linearly moving the constrained outer portion in a direction in which an angle with respect to the plate surface of the blank is 30 ° or more and 60 ° or less. The angle is preferably 40 ° or more and 50 ° or less, and more preferably 45 °.
In the method of the configuration (3), in the shear deformation step, the cross-sectional shape and size of the portion that becomes the vertical wall portion change to a bent portion (a boundary portion between the vertical wall portion, the top plate portion, and the flange portion). Since it is hard to change except a part, an expansion | extension and wrinkle are hard to produce in the said vertical wall part.
In the method of the configuration (4), the cross-sectional shape and dimensions of the
(5)前記縦壁部の形成工程として、前記剪断変形工程を行った後に絞り成形工程を行う。(6)前記縦壁部の形成工程として、絞り成形工程を行った後に前記剪断変形工程を行う。(7)前記湾曲チャンネル部品は前記縦壁部の外側にフランジ部を有さず、前記縦壁部の形成工程として、前記剪断変形工程を行った後にフォーム成形工程を行う。 The method according to this aspect can be performed in combination with the shear deformation step and the conventional draw forming step and foam forming step as in the following configurations (5) to (7).
(5) As the step of forming the vertical wall portion, the drawing step is performed after the shear deformation step. (6) As the forming step of the vertical wall portion, the shear deformation step is performed after the drawing forming step. (7) The curved channel part does not have a flange portion outside the vertical wall portion, and the foam forming step is performed after the shear deformation step as the step of forming the vertical wall portion.
この態様の方法では、前記剪断変形工程後に、変形部の外方部12bが縦壁部の外側にフランジ状に存在するため、この態様の方法で、縦壁部の外側にフランジ部を有さない湾曲チャンネル部品を作製する際には、後加工が必要になる。その後加工として、レーザー切断やトリム金型を使用して、フランジ状の外方部12bを除去する方法がある。 In the configurations (5) and (6), by performing the shear deformation process as a pre-process or a post-process of the drawing process, a curved press is formed as compared with the case where the vertical wall portion is formed only by the drawing process. The shrinkage flange deformation of the molded part is alleviated.
In the method of this aspect, after the shear deformation step, the
(8)前記剪断変形工程後の前記縦壁部を金型で挟み込むことで、前記縦壁部に生じたしわを伸ばすしわ伸ばし工程を有する。
このとき、前記縦壁部に当接する前記金型のプレス面に、前記縦壁部の線長を稼ぐための凹凸を形成しておくと、更に縦壁部のしわが伸びるようになる。
(9)前記剪断変形工程を、300℃以上1000℃以下に加熱されたブランクに対して行う。好ましくは400℃以上900℃以下である。 The method according to this aspect can have the following configuration (8) or (9).
(8) It has a wrinkle extending step of extending the wrinkles generated in the vertical wall portion by sandwiching the vertical wall portion after the shear deformation step with a mold.
At this time, if unevenness for increasing the line length of the vertical wall portion is formed on the press surface of the mold that comes into contact with the vertical wall portion, wrinkles of the vertical wall portion are further extended.
(9) The said shear deformation process is performed with respect to the blank heated at 300 degreeC or more and 1000 degrees C or less. Preferably it is 400 degreeC or more and 900 degrees C or less.
なお、この態様の方法で使用するブランクの材質は、公知のプレス成形で使用されているブランクの材質のいずれであってもよい。例えば、590MPa以上の高強度の鋼板や、アルミニウム合金板などの、従来法ではプレス成形が難しいブランクであっても、この態様の方法を行うことで、縮みフランジ変形が抑制された湾曲チャンネル部品などの部品を得ることができる。 When the heating temperature is less than 300 ° C., the material is not sufficiently softened, so there is no advantage of heating. When the heating temperature is higher than 1000 ° C., a thick scale is generated on the surface of the blank (steel plate). As a heating method of the blank, a normal method such as heating in a heating furnace, high frequency heating, electric heating or the like can be adopted.
In addition, the material of the blank used by the method of this aspect may be any blank material used in known press molding. For example, even for blanks that are difficult to press form by conventional methods, such as high-strength steel plates of 590 MPa or higher, and aluminum alloy plates, curved channel parts in which shrinkage flange deformation is suppressed by performing this method. The parts can be obtained.
この態様の方法は、前記剪断変形工程でブランクの基部と変形部の外方部を別々に拘束する。その拘束方法としては従来より公知の方法が採用できる。例えば、冶具でブランクを挟んで固定する方法、金型に突起物を設けてブランクを引っ掛ける方法、磁力でブランクを固定する方法などがあり、これらの方法を単独であるいは組み合わせて採用する。 <About blank restraint method>
In the method according to this aspect, the base portion of the blank and the outer portion of the deformation portion are separately restrained in the shear deformation step. A conventionally known method can be adopted as the restraining method. For example, there are a method of fixing a blank with a jig, a method of providing a projection on a mold and hooking the blank, a method of fixing the blank with a magnetic force, and these methods are used alone or in combination.
なお、冶具の凹凸形状とされた部分を硬質化すれば、凹凸形状の磨耗や欠落を防ぐことができる。硬質化方法としては、高周波焼き入れや浸炭焼き入れ、火炎焼き入れ、レーザー焼き入れなどの焼き入れ処理を施す方法、低温浸硫処理、化学的蒸着法や物理的蒸着法といった表面改質法が挙げられる。 As a specific example, there is a method of providing a screw such as a bolt on a jig that sandwiches the blank. In this method, a force for fastening the blank with the jig can be applied by a fastening force of the screw. There is also a method in which a bead portion is provided in a jig that sandwiches a blank, and in this method, bending / unbending deformation and frictional resistance that the material undergoes when moving the bead portion can be used as a restraint force for material movement. There is also a method in which a concavo-convex shape is formed by knurling (knurling) on a jig that is fixed with a blank interposed therebetween. In this method, the concavo-convex shape bites into the blank, so that the movement of the material can be easily prevented. As a method of knurling, there are a cutting method and a method of transferring the concavo-convex shape by strongly pressing it against the jig, but any method may be used as long as the concavo-convex shape is imparted to the jig.
In addition, if the part made into the uneven | corrugated shape of a jig | tool is hardened, abrasion and a missing part of an uneven | corrugated shape can be prevented. Hardening methods include induction hardening, carburizing quenching, flame quenching, laser quenching and other quenching treatments, low temperature sulfurization treatment, chemical vapor deposition and physical vapor deposition surface modification methods. Can be mentioned.
前記剪断変形工程を前記構成(3)または(4)の方法で行う際に、ブランクの外方部を拘束したまま動かす方法としては、一般的なプレス成形で使用するプレス機械のスライドの動きを、上下方向から前記構成(3)または前記構成(4)で行う動きに変換して利用する方法が挙げられる。その場合、カム機構に代表される傾斜面を利用した機構、リンク機構、てこを用いた機構などが採用できる。プレス機械の駆動力を利用するだけでなく、電気や空気圧、油圧を利用したシリンダを用いた方法を採用してもよい。 <About the movement method of the constrained blank>
When performing the shear deformation step by the method of the configuration (3) or (4), as a method of moving the outer portion of the blank while restraining, the movement of the slide of a press machine used in general press molding is used. A method of converting from the vertical direction to the movement performed in the configuration (3) or the configuration (4) is used. In that case, a mechanism using an inclined surface represented by a cam mechanism, a link mechanism, a mechanism using a lever, or the like can be adopted. In addition to using the driving force of the press machine, a method using a cylinder using electricity, air pressure, or hydraulic pressure may be employed.
すなわち、縦壁部に湾曲部を有するプレス成形部品に縮みフランジ変形に起因したしわが発生することを防止できる。また、前記剪断変形工程は、量産時に様々な変動があっても安定して行うことができるため、プレス製品の不良率の低減にも寄与することができる。
そして、この実施形態を、590MPa以上の高強度の鋼板や、アルミニウム合金板などのプレス成形が難しい材料に適用することで、様々な形状のプレス成形品が製造できるようになるため、部品の軽量化や高強度化に貢献できる。 According to this embodiment, when press-molding a press-molded part having a curved portion in the vertical wall portion, it is possible to suppress shrinkage flange deformation that occurs in at least the vertical wall portion of the vertical wall portion and the flange portion.
That is, it is possible to prevent wrinkles due to shrinkage and flange deformation in a press-molded part having a curved portion in the vertical wall portion. In addition, the shear deformation process can be stably performed even when there are various fluctuations during mass production, and thus can contribute to a reduction in the defective rate of the pressed product.
Since this embodiment can be applied to materials that are difficult to press-form, such as high-strength steel plates of 590 MPa or higher, and aluminum alloy plates, various shapes of press-formed products can be manufactured. Can contribute to the improvement of strength and strength.
[第1実施形態]
第1実施形態では、図3に示す形状の湾曲チャンネル部品を作製する。
図3に示すように、湾曲チャンネル部品2は、基部に対応する天板部21と、湾曲部22aがある縦壁部22と、縦壁部22に連続するフランジ部24とを有する。フランジ部24は、縦壁部22の湾曲部22aに連続する部分に湾曲部24aを有する。
湾曲チャンネル部品2の湾曲部22aがある縦壁部22と、これに連続するフランジ部24を、以下の方法で形成する。ここで、湾曲部22a以外の部分を、通常の絞り成形工程で形成しても良い。 Next, a specific example of this embodiment will be described.
[First Embodiment]
In the first embodiment, a curved channel component having the shape shown in FIG. 3 is produced.
As shown in FIG. 3, the
The
先ず、図4に示すように、ブランク1の基部11の境界側部分(基部11の変形部12との境界側の部分)11aを、パンチ31と第1パッド32とにより挟んで拘束し、変形部12の外方部(フランジ部となる部分)12bを、しわ押え33と第2パッド34とにより挟んで拘束する。基部11の中央部分11bは、拘束してもよいし、拘束しなくてもよい。この状態では、パンチ31及び第1パッド32と、しわ押え33及び第2パッド34とは、ブランク1の板厚方向からみて、離隔距離S0だけ離れた状態となっている。 Although the blank 1 is a uniform single plate, as shown in FIG. 4, for convenience, when divided into a
First, as shown in FIG. 4, the
次に、図5に示すように、縦壁部となる部分12aが、矢印Aで示すように境界側部分11aとの境界線上の点(縦壁部22の湾曲部22aの屈曲点)Bを中心に回転するように、外方部12bを拘束しているしわ押え33と第2パッド34を、相対的に下側に旋回させつつパンチ31及び第1パッド32に近づくように、矢印Cに沿って移動させる。これが剪断変形工程に相当する。この剪断変形工程により、ブランク1の縦壁部となる部分12aが、境界側部分11aおよび外方部12bとの境界で屈曲して、湾曲チャンネル部品2の縦壁部22となる。 Here, the
Next, as shown in FIG. 5, the
さらに、外方部12bが拘束されたまま移動してフランジ部24となるため、フランジ部24の湾曲部24aの外縁部にも縮みフランジ変形が生じにくく、フランジ部24にもしわが生じにくい。 Further, in the method of this embodiment, in the shear deformation step, the
Furthermore, since the
第2実施形態でも、第1実施形態と同様に、図3に示す形状の湾曲チャンネル部品2を作製する。第2実施形態では、湾曲チャンネル部品2の湾曲部22aがある縦壁部22と、これに連続するフランジ部24を、図6に示す以下の方法で形成する。
この実施形態の方法は、外方部12bを拘束しているしわ押え33と第2パッド34の移動方法が第1実施形態の方法と異なり、それ以外については第1実施形態の方法と同じである。 [Second Embodiment]
In the second embodiment, similarly to the first embodiment, the
The method of this embodiment is different from the method of the first embodiment in the method of moving the
次に、外方部12bを拘束しているしわ押え33と第2パッド34を、図6に矢印Cで示すように、ブランクの板厚方向からみてパンチ31及び第1パッド32に近づくように斜め下方に向けて直線移動させる。具体的には、しわ押え33と第2パッド34を、ブランク1の板面に対する角度(θ)が30°~60°の範囲の角度となる斜め方向に直線移動させる。これにより、拘束された外方部12bが30°~60°の範囲から選択した角度θとなる方向に直線移動する。これが剪断変形工程に相当する。 First, as shown by a solid line in FIG. 6, the
Next, as shown by an arrow C in FIG. 6, the
そのため、この実施形態で作製された湾曲チャンネル部品2は、縦壁部22の湾曲部22aの外縁部に縮みフランジ変形が生じにくい。 In this shear deformation step, as shown in FIG. 1B, the blank 1 has an in-plane surface of the
For this reason, the
外方部12bのブランク1の板面に対する移動角度(θ)が45°でない場合には、θが45°の場合と比較して、縦壁部22にしわが発生する可能性が高くなるが、θが30°以上60°以下であれば、縦壁部22に生じる縮みに起因するシワの発生が回避でき、縦壁部22にしわが生じても、そのしわが後加工などで除去可能の小さなものとなることを確認している。 In the method of this embodiment, in the shear deformation step, the cross-sectional shape of the
When the movement angle (θ) of the
なお、図6の状態からさらに移動させて、縦壁部となる部分12aをパンチ31の側面と第2パッド34の側面とで挟み込むことにより、図6の状態で縦壁部となる部分12aに生じていたしわを、パンチ31の側面と第2パッド34の側面とによる挟み込みで伸ばすことができる。 Further, since the
In addition, by further moving from the state of FIG. 6 and sandwiching the
第3実施形態でも、第1実施形態と同様に、図3に示す形状の湾曲チャンネル部品2を作製する。第3実施形態では、湾曲チャンネル部品2の湾曲部22aがある縦壁部22とこれに連続するフランジ部24を、図7に示す以下の方法で形成する。
プレス成形で使用する金型は基本的には図4と同じであるが、図7に示すように、ブランク1の下方に、側面(縦壁部と当接するプレス面)に凸部35aを有するパンチ35を配置する。しわ押え33の上方に、側面に凹部36aを有する第2パッド36を配置する。それ以外については第2実施形態と同じである。 [Third Embodiment]
In the third embodiment, similarly to the first embodiment, the
The mold used for press molding is basically the same as that shown in FIG. 4, but as shown in FIG. 7, the blank 1 has a
このとき、縦壁部が金型に挟み込まれることで、縦壁部にしわが発生していても、そのしわが伸ばされ易くなる。特に、凹部36aに応じた分だけ縦壁部となる部分12aの線長が長くなる、つまり線長を稼ぐことが出来る結果、縦壁部にしわが発生していても、そのしわが伸ばさせる事となる。
このしわ伸ばし工程は、第1実施形態などで説明した剪断変形工程の後の最終に行っても良い。剪断変形工程に連続してしわ伸ばし工程を行うことで、しわ伸ばし工程のために工程数を増やすことが無い。 Subsequently, by moving the
At this time, since the vertical wall portion is sandwiched between the molds, the wrinkle is easily stretched even if the vertical wall portion is wrinkled. In particular, the line length of the
This wrinkle stretching process may be performed finally after the shear deformation process described in the first embodiment and the like. By performing the wrinkle stretching process continuously after the shear deformation process, the number of processes is not increased for the wrinkle stretching process.
第4実施形態でも、第1実施形態と同様に、図3に示す形状の湾曲チャンネル部品2を作製する。第4実施形態では、湾曲チャンネル部品2の湾曲部22aがある縦壁部22とこれに連続するフランジ部24を、図8に示す以下の方法で形成する。
この実施形態では、縦壁部22を、剪断変形工程を行った後に絞り成形工程を行う二工程で形成する。そのため、剪断変形工程で拘束する外方部12bに、縦壁部22となる部分の一部が含まれる。また、縦壁部22となる部分の内方部(基部11側の部分)12cを板面内で剪断変形させる。 [Fourth Embodiment]
In the fourth embodiment, similarly to the first embodiment, the
In this embodiment, the
先ず、ブランク1の基部11の境界側部分11aを、パンチ31と第1パッド32とにより挟んで拘束し、変形部12の外方部(縦壁部22になる部分の一部とフランジ部24になる部分)12bを、しわ押え33と第2パッド34とにより挟んで拘束する。 The mold used in the shear deformation step is basically the same as that of the second embodiment, but as shown in FIG. 8A, a separation distance S0 between the
First, the
次に、図8(b)に示すように、外方部12bを拘束している第2パッド34に代えてダイ37を設置し、ダイ37としわ押え33を矢印Bに沿って移動することで絞り成形工程を行う。これにより、外方部12bがパンチ31側に引き出されながら伸ばされるとともに、内方部12cも引き伸ばされて、縦壁部22が形成される。 This shear deformation process is performed until the angle between the
Next, as shown in FIG. 8B, a
第5実施形態でも、第1実施形態と同様に、図3に示す形状の湾曲チャンネル部品2を作製する。第5実施形態では、湾曲チャンネル部品2の湾曲部22aがある縦壁部22とこれに連続するフランジ部24を、図9に示す以下の方法で形成する。
この実施形態では、縦壁部22を、絞り成形工程を行った後に剪断変形工程を行う二工程で形成する。 [Fifth Embodiment]
In the fifth embodiment, similarly to the first embodiment, the
In this embodiment, the
次に、図9(b)に示すように、外方部12bをしわ押え33と第2パッド34で拘束し、しわ押え33と第2パッド34を、ブランク1の板面に対する角度(θ)が30°~60°の範囲の角度となる方向に直線移動させる。これにより、拘束された外方部12bが30°~60°の範囲から選択した角度θとなる方向に直線移動する。これに伴い、ブランク1の縦壁部となる部分12aの板面内に剪断変形が生じ、縦壁部22とフランジ部24が形成される。これが剪断変形工程に相当する。 Accordingly, the
Next, as shown in FIG. 9 (b), the
第6実施形態では、図10に示す形状の湾曲チャンネル部品を作製する方法について説明する。このような湾曲チャンネル部品は、例えば、自動車のロアアーム部品として使用される。
図10に示すように、湾曲チャンネル部品4は、天板部41と、湾曲部42aがある縦壁部42とからなる。この実施形態では、縦壁部42を、剪断変形工程とフォーム成形工程の二段階で形成する。剪断変形工程で使用する金型の基本構成は第2実施形態と同じである。 [Sixth Embodiment]
In the sixth embodiment, a method for producing a curved channel component having the shape shown in FIG. 10 will be described. Such a curved channel part is used, for example, as a lower arm part of an automobile.
As shown in FIG. 10, the
なお、フォーム成形工程の前に行う剪断変形工程は、拘束された外方部12bを図11(a)に矢印Cで示すように、ブランク1の板面に対する角度(θ)が30°~60°の範囲の角度となる方向に直線移動することで行ってもよい。 Next, the
In the shear deformation step performed before the foam forming step, the angle (θ) with respect to the plate surface of the blank 1 is 30 ° to 60 °, as indicated by the arrow C in FIG. You may carry out by moving linearly in the direction which becomes the angle of the range of °.
本発明の対象となる湾曲チャンネル部品の別の形態を、図12に示す。
この湾曲チャンネル部品60は、図12に示すように、天板部61と縦壁部62との境界部を天板部側に凸となる曲線状の折曲げ線で折り曲げることで、縦壁部62が天板部61側に凸となるように、つまり縦壁部62が天板部61側に凸となるように高さ方向に面内変形(湾曲)して湾曲部が形成される例である。縦壁部の湾曲に伴い、天板部61も縦壁部側に凹となるように湾曲した形状となっている。またこの例ではフランジ部64にも面外方向の湾曲が形成されている。 [Other Embodiments]
Another form of the curved channel component that is the subject of the present invention is shown in FIG.
As shown in FIG. 12, the
なお、天板部61も湾曲しているので、パンチ31と第1パッド32とのブランクを押さえる対向面を、その湾曲した天板部に沿った面形状としておく。
また、縦壁部の湾曲は、面外方向と縦方向との両方向に変形した湾曲部であっても、本発明の対象となる。 Even in the
In addition, since the
Further, the curved portion of the vertical wall portion is a subject of the present invention even if the curved portion is deformed in both the out-of-plane direction and the vertical direction.
絞り成形ではフランジ部に位置する材料が縦壁部に引き込まれるため、成形後のフランジ部の形状が第1~第5実施形態の方法と異なる。第1~第5実施形態の方法と絞り成形とでブランクの形状を変えて、プレス成形後に縦壁部の湾曲部付近のフランジ幅が50mmとなるようにした。絞り成形用のブランクの形状は、全ひずみ理論に基づいた逆解析により求めた。 By the method described in the first to fifth embodiments and the conventional press molding (drawing), the
In drawing, since the material located in the flange portion is drawn into the vertical wall portion, the shape of the flange portion after molding is different from the methods of the first to fifth embodiments. The shape of the blank was changed between the methods of the first to fifth embodiments and the drawing, so that the flange width near the curved portion of the vertical wall portion was 50 mm after press forming. The shape of the blank for drawing was determined by inverse analysis based on the total strain theory.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、図5に示す第1実施形態の方法により、剪断変形工程のみで形成した。
図13(a)は、使用した金型およびブランクの平面図であり、図13(b)はそのA-A断面図である。
パンチ31および第1パッド32の内周面の、湾曲部22aに対応する部分の曲率半径R1は100mmである。しわ押え33および第2パッド34の外周面の、湾曲部22aに対応する部分の曲率半径R2は90mmである。図13(b)に示すパンチ31と第2パッド34との離隔距離S0を100mmとした。パンチ31の上端角部の面取り半径R3を10mm、第2パッド34の下端角部の面取り半径R4を10mmとした。 <Sample No. 1-1>
The
FIG. 13 (a) is a plan view of the mold and blank used, and FIG. 13 (b) is a cross-sectional view taken along the line AA.
The curvature radius R1 of the inner peripheral surfaces of the
次に、図5の矢印Cに沿ってしわ押え33と第2パッド34を移動することにより、縦壁部となる部分12aを図5の矢印Aに沿って回転させた。この回転を、図14(b)に示すように、パンチ31と第2パッド34との間隔Sが10mmとなるまで行った。これにより、ブランク1の縦壁部となる部分12aを剪断変形させて、縦壁部22を形成した。図14(a)は、この状態での金型およびブランクの平面図であり、図14(b)はそのA-A断面図である。図14(b)における縦壁部22の高さTは100mmであった。
この例では、剪断変形工程を、加熱されていないブランクを用いて室温で行った。
得られた湾曲チャンネル部品について、発生したしわを表2に示すように評価した。 First, as shown in FIGS. 5 and 13 (a), the
Next, by moving the
In this example, the shear deformation process was performed at room temperature using an unheated blank.
The resulting curved channel parts were evaluated for wrinkles generated as shown in Table 2.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.1-1と同じ方法で作製した。
この例では、図14(b)の状態から、更にパンチ31と第2パッド34で縦壁部22を挟み込むことで、しわ潰し工程を行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.1-2>
The
In this example, the wrinkle crushing step was performed by sandwiching the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.1-1と同じ方法で作製した。
この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No. 1-3>
The
In this example, the shear deformation process was performed using a blank heated to 300 ° C.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.1-1と同じ方法で作製した。
この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。また、図14(b)の状態から、更にパンチ31と第2パッド34で縦壁部22を挟み込むことで、しわ潰し工程を行った。
得られた各湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.1-4>
The
In this example, the shear deformation process was performed using a blank heated to 300 ° C. Further, from the state of FIG. 14B, the
For each of the obtained curved channel parts, the generated wrinkles were evaluated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、図6に示す第2実施形態の方法により、剪断変形工程のみで形成した。
金型は、しわ押え33と第2パッド34の移動機構が異なる以外は、サンプルNo.1-1と同じものを使用した。図13(b)に示すパンチ31と第2パッド34との離隔距離S0を100mmとした。
先ず、ブランク1の基部11の境界側部分11aを、パンチ31と第1パッド32とにより挟んで拘束し、変形部12の外方部(フランジ部となる部分)12bを、しわ押え33と第2パッド34とにより挟んで拘束した。 <Sample No.2-1>
The
The same mold as Sample No. 1-1 was used except that the moving mechanism of the
First, the
この例では、剪断変形工程を、加熱されていないブランクを用いて室温で行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては○(品質上問題とならない程度の微少なしわ)であった。 Next, the
In this example, the shear deformation process was performed at room temperature using an unheated blank.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, regardless of the blank material used, the wrinkle was ○ (a fine wrinkle that does not cause a problem in quality).
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-1と同じ方法で作製した。
この例では、図14(b)の状態から、更にパンチ31と第2パッド34で縦壁部22を挟み込むことで、しわ潰し工程を行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.2-2>
The
In this example, the wrinkle crushing step was performed by sandwiching the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-1と同じ方法で作製した。
この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.2-3>
The
In this example, the shear deformation process was performed using a blank heated to 300 ° C.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-1と同じ方法で作製した。
この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。また、図14(b)の状態から、更にパンチ31と第2パッド34で縦壁部22を挟み込むことで、しわ潰し工程を行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.2-4>
The
In this example, the shear deformation process was performed using a blank heated to 300 ° C. Further, from the state of FIG. 14B, the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-1と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を45°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。サンプルNo.2-1では、使用したブランクの材質がいずれの場合でも、しわについては○(品質上問題とならない程度の微少なしわ)であった。 <Sample No.3-1>
The
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. In sample No. 2-1, regardless of the blank material used, the wrinkle was ○ (a fine wrinkle that does not cause quality problems).
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-2と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を45°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.3-2>
The
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-3と同じ方法で作製した。
度(θ)を45°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.3-3>
A
The degree (θ) was 45 °.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-4と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を45°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.3-4>
A
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-1と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を60°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。サンプルNo.2-1では、使用したブランクの材質がいずれの場合でも、しわについては○(品質上問題とならない程度の微少なしわ)であった。 <Sample No.4-1>
The
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. In sample No. 2-1, regardless of the blank material used, the wrinkle was ○ (a fine wrinkle that does not cause quality problems).
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-2と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を60°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.4-2>
The
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-3と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を60°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.4-3>
A
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-4と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を60°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.4-4>
A
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-1と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を20°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては×(顕著なしわ)であった。 <Sample No.5-1>
The
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-2と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を20°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては×(顕著なしわ)であった。 <Sample No.5-2>
The
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-3と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を20°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては×(顕著なしわ)であった。 <Sample No.5-3>
A
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-4と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を20°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては×(顕著なしわ)であった。 <Sample No.5-4>
A
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-1と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を70°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては×(顕著なしわ)であった。 <Sample No. 6-1>
The
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-2と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を70°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては×(顕著なしわ)であった。 <Sample No.6-2>
The
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-3と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を70°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては×(顕著なしわ)であった。 <Sample No. 6-3>
A
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-4と同じ方法で作製した。
図6に示すように、しわ押え33と第2パッド34を矢印Cに沿って直線移動させる角度(θ)を70°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては×(顕著なしわ)であった。 <Sample No. 6-4>
A
As shown in FIG. 6, the angle (θ) for linearly moving the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (prominent wrinkle) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、図9に示す第5実施形態の方法により、絞り成形工程を行った後に剪断変形工程を行う二工程で形成した。
絞り成形工程で使用した金型は、図13に示す金型において、第2パッド34をダイ37に代えたものである。ダイ37の下端角部の面取り半径は、図13に示す金型の第2パッド34の下端角部の面取り半径R4と同じ10mmである。パンチ31とダイ37との間隔Lを87mmとした。 <Sample No.7-1>
The
The mold used in the drawing process is obtained by replacing the
次に、ブランク1の縦壁部となる部分12aの板面に対する角度θを60°として、しわ押え33と第2パッド34を矢印Cに沿って直線移動させた。この移動を、パンチ31と第2パッド34との間隔Sが10mmとなるまで行った。これにより、縦壁部となる部分12aを剪断変形させて縦壁部22を形成した。図9(b)における縦壁部22の高さT2は100mmであった。 Next, the
Next, the
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、サンプルNo.7-1では、使用したブランクの材質がいずれの場合でも、しわについては○(品質上問題とならない程度の微少なしわ)であった。 In this example, the shear deformation process was performed at room temperature using an unheated blank.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, in sample No. 7-1, the wrinkle was ○ (a fine wrinkle that does not cause a quality problem) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.7-1と同じ方法で作製した。
この例では、図9(b)の状態から、更にパンチ31と第2パッド34で縦壁部22を挟み込むことで、しわ潰し工程を行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.7-2>
A
In this example, the wrinkle crushing process was performed by sandwiching the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.7-1と同じ方法で作製した。
この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.7-3>
A
In this example, the shear deformation process was performed using a blank heated to 300 ° C.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.7-1と同じ方法で作製した。
この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。また、図9(b)の状態から、更にパンチ31と第2パッド34で縦壁部22を挟み込むことで、しわ潰し工程を行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.7-4>
A
In this example, the shear deformation process was performed using a blank heated to 300 ° C. Further, from the state of FIG. 9B, the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、図8に示す第4実施形態の方法により、剪断変形工程を行った後に絞り成形工程を行う二工程で形成した。
剪断変形工程では、サンプルNo.2-1で使用したものと同じ金型を使用して、パンチ31と第2パッド34との離隔距離S0を50mmとした。
先ず、図8(a)に示すように、ブランク1の基部11の境界側部分11aを、パンチ31と第1パッド32とにより挟んで拘束し、変形部12の外方部(フランジ部となる部分)12bを、しわ押え33と第2パッド34とにより挟んで拘束した。次に、θ=45°として、しわ押え33と第2パッド34を矢印Cに沿って直線移動させることで剪断変形工程を行った。この剪断変形工程を、ブランク1の内方部12cの高さT1が50mmとなるまで、加熱されていないブランクを用いて室温で行った。 <Sample No. 8-1>
The
In the shear deformation process, the same mold as that used in Sample No. 2-1 was used, and the separation distance S0 between the
First, as shown in FIG. 8A, the
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、サンプルNo.8-1について、使用したブランクの材質がいずれの場合でも、しわについては○(品質上問題とならない程度の微少なしわ)であった。 Next, as shown in FIG. 8 (b), the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, for sample No. 8-1, regardless of the blank material used, the wrinkle was ○ (a fine wrinkle that would not cause a quality problem).
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.8-1と同じ方法で作製した。
この例では、図8(b)の状態から、更にパンチ31と第2パッド34で縦壁部22を挟み込むことで、しわ潰し工程を行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.8-2>
The
In this example, the wrinkle crushing process was performed by sandwiching the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.8-1と同じ方法で作製した。
この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No. 8-3>
The
In this example, the shear deformation process was performed using a blank heated to 300 ° C.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.8-1と同じ方法で作製した。
この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。また、図8(b)の状態から、更にパンチ31と第2パッド34で縦壁部22を挟み込むことで、しわ潰し工程を行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.8-4>
The
In this example, the shear deformation process was performed using a blank heated to 300 ° C. Further, from the state of FIG. 8B, the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、絞り成形工程のみで形成した。
図15(a)は、使用した金型およびブランクの平面図であり、図15(b)はそのA-A断面図である。
プレス成形で使用する金型は、従来の絞り成形の金型と同じであり、ダイ51と、パンチ52と、しわ押え53とを有する。ダイ51の凹部の内周面51aの湾曲部22aに対応する部分の曲率半径R1は100mmである。ダイ51の凹部の深さFは100mmである。パンチ52の外周面52aの湾曲部22aに対応する部分の曲率半径R2は90mmである。 <Sample No.9-1>
The
FIG. 15A is a plan view of the mold and blank used, and FIG. 15B is a cross-sectional view taken along the line AA.
The mold used in the press molding is the same as a conventional drawing mold, and includes a die 51, a
先ず、図15に示すように、パンチ52の両側にしわ押え53を配置し、これらの上にブランク1を配置した。ブランク1の基部11をパンチ52の上に配置し、変形部12をしわ押え53上に配置した。次に、ブランク1の上方にダイ51を設置して、ダイ51を下降させた。その際に、ダイ51の凸部51bとしわ押さえ53で押さえたブランク1の変形部12に適度な張力を加えた。この絞り成形工程を室温で行った。 The distance K between the inner
First, as shown in FIG. 15,
すなわち、この例では、高強度の590、980、1180MPa級鋼板をブランクとして用いた場合、縦壁部に顕著なしわが発生し、フランジ部に割れが発生した。 The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, for wrinkles, the blank material used was “270” and “aluminum alloy”: ○ (a fine wrinkle that does not cause quality problems), otherwise x (a remarkable wrinkle). there were.
That is, in this example, when a high-strength 590, 980, 1180 MPa class steel plate was used as a blank, remarkable wrinkles occurred in the vertical wall portion and cracks occurred in the flange portion.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.9-1と同じ方法で作製した。
この例では、絞り成形工程を、300℃に加熱されたブランクを用いて行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、しわについては、使用したブランクの材質が「980」と「1180」の場合は×(顕著なしわ)、それ以外の場合は○(品質上問題とならない程度の微少なしわ)であった。 <Sample No. 9-2>
A
In this example, the drawing process was performed using a blank heated to 300 ° C.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, wrinkles were evaluated as x (prominent wrinkles) when the blank material used was “980” and “1180”, and ○ (small wrinkles that would not cause quality problems) in other cases. It was.
図10に示す湾曲チャンネル部品4を、図11に示す第6実施形態の方法により、剪断変形工程を行った後にフォーム成形工程を行う二工程で形成した。
剪断変形工程では、サンプルNo.2-1で使用したものと同じ金型を使用して、パンチ31と第2パッド34との離隔距離S0を50mmとした。
先ず、図11(a)に示すように、ブランク1の基部11の境界側部分11aを、パンチ31と第1パッド32とにより挟んで拘束し、変形部12の外方部(フランジ部となる部分)12bを、しわ押え33と第2パッド34とにより挟んで拘束した。次に、外方部12bを拘束しているしわ押え33と第2パッド34を、θ=45°で矢印Cに沿って直線移動させる剪断変形工程を行った。 <Sample No. 10-1>
The
In the shear deformation process, the same mold as that used in Sample No. 2-1 was used, and the separation distance S0 between the
First, as shown in FIG. 11A, the
次に、図11(b)に示すように、外方部12bを拘束しているしわ押え33と第2パッド34を外して、ブランク1の縦壁部となる部分(傾斜壁部)12aおよび外方部(フランジ部)12bの上にダイ37を設置した。次に、ダイ37を矢印Bに沿って移動することでフォーム成形工程を行った。これにより、過渡的にフランジ部となっている部分12bと傾斜壁部12aとの屈曲部が伸ばされて、縦壁部42が形成された。図11(b)における縦壁部42の高さT2は100mmであった。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては○(品質上問題とならない程度の微少なしわ)であった。 In this state, the
Next, as shown in FIG. 11 (b), the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, regardless of the blank material used, the wrinkle was ○ (a fine wrinkle that does not cause a problem in quality).
図10に示す湾曲チャンネル部品4を、以下の点を除き、サンプルNo.10-1と同じ方法
で作製した。
この例では、図11(b)の状態から、更にパンチ31とダイ37で縦壁部42を挟み込むことで、しわ潰し工程を行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No. 10-2>
A
In this example, the wrinkle crushing process was performed by sandwiching the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図10に示す湾曲チャンネル部品4を、以下の点を除き、サンプルNo.10-1と同じ方法
で作製した。
この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No. 10-3>
A
In this example, the shear deformation process was performed using a blank heated to 300 ° C.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図10に示す湾曲チャンネル部品4を、以下の点を除き、サンプルNo.10-1と同じ方法
で作製した。
この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。また、図11(b)の状態から、更にパンチ31とダイ37で縦壁部42を挟み込むことで、しわ潰し工程を行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No. 10-4>
A
In this example, the shear deformation process was performed using a blank heated to 300 ° C. Further, from the state of FIG. 11 (b), the wrinkle crushing step was performed by sandwiching the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図10に示す湾曲チャンネル部品4を、フォーム成形のみで作製した。
サンプルNo.9-1で使用した図15に示す金型からしわ押え53を外した金型を使用し、ブランク1の基部11をパンチ52の上に配置した後、ブランク1の上方にダイ51を設置して、ダイ51を下降させることにより、ブランク1の変形部12を折り曲げることにより、縦壁部42を形成した。 <Sample No. 11-1>
The
A mold obtained by removing the
すなわち、この例では、270MPa級鋼板をブランクとして用いた場合、しわ評価に問題はなかったが、縦壁部の端部にネッキングが発生した。高強度の590、980、1180MPa級鋼板をブランクとして用いた場合、縦壁部にしわが発生した。 The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, for wrinkles, the blank material used was “270” and “aluminum alloy”: ○ (a fine wrinkle that does not cause quality problems), otherwise x (a remarkable wrinkle). there were.
That is, in this example, when a 270 MPa grade steel plate was used as a blank, there was no problem in wrinkle evaluation, but necking occurred at the end of the vertical wall portion. When a high-strength 590, 980, 1180 MPa grade steel plate was used as a blank, wrinkles occurred in the vertical wall portion.
図10に示す湾曲チャンネル部品4を、以下の点を除き、サンプルNo.11-1と同じ方法
で作製した。
この例では、フォーム成形工程を、300℃に加熱されたブランクを用いて行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、しわについては、使用したブランクの材質が「980」「1180」の場合は×(顕著なしわ)、それ以外の場合は○(品質上問題とならない程度の微少なしわ)であった。 <Sample No. 11-2>
A
In this example, the foam molding process was performed using a blank heated to 300 ° C.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was x (remarkable wrinkle) when the material of the blank used was “980” or “1180”, and it was ○ (small wrinkle that would not cause quality problems) in other cases. .
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-1と同じ方法で作製した。図7に示すように、しわ押え33と第2パッド36を矢印Cに沿って直線移動させる角度(θ)を45°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。サンプルNo.10-1では、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.12-1>
The
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. In sample No. 10-1, regardless of the blank material used, the wrinkle was ◎ (no wrinkle by visual inspection).
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-2と同じ方法で作製した。図7に示すように、しわ押え33と第2パッド36を矢印Cに沿って直線移動させる角度(θ)を45°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.12-2>
The
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-3と同じ方法で作製した。図7に示すように、しわ押え33と第2パッド36を矢印Cに沿って直線移動させる角度(θ)を45°とした。
得られた湾曲チャンネル部品について、発生した割れとしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No.12-3>
A
Regarding the obtained curved channel part, the generated cracks and wrinkles were evaluated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図3に示す湾曲チャンネル部品2の縦壁部22とこれに連続するフランジ部24を、以下の点を除き、サンプルNo.2-4と同じ方法で作製した。図7に示すように、しわ押え33と第2パッド36を矢印Cに沿って直線移動させる角度(θ)を45°とした。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No. 12-4>
A
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図10に示す湾曲チャンネル部品の縦壁部42を、図11に示す第6実施形態の方法により、剪断変形工程を行った後にフォーム成形工程を行う二工程で形成した。
剪断変形工程では、サンプルNo.2-1で使用したものと同じ金型を使用して、パンチ31と第2パッド34との離隔距離S0(図8(a)参照)を50mmとした。先ず、図8(a)に示すように、ブランク1の基部11の境界側部分11aを、パンチ31と第1パッド32とにより挟んで拘束し、変形部12の外方部(フランジ部となる部分)12bを、しわ押え33と第2パッド34とにより挟んで拘束した。次にθ=45°として、しわ押え33と第2パッド34を矢印Cに沿って直線移動させることで剪断変形工程を行った。この剪断変形工程を、ブランク1の内方部12cの高さT1が50mmとなるまで、加熱されていないブランクを用いて室温で行った。 <Sample No. 13-1>
The
In the shear deformation process, the same mold as that used in Sample No. 2-1 was used, and the separation distance S0 (see FIG. 8A) between the
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては○(品質上問題とならない程度の微少なしわ)であった。 Next, as shown in FIG. 11B, the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, regardless of the blank material used, the wrinkle was ○ (a fine wrinkle that does not cause a problem in quality).
図10に示す湾曲チャンネル部品の縦壁部42を、以下の点を除き、サンプルNo.11-1
と同じ方法で作製した。この例では、図11(b)の状態から、更にパンチ31とダイ37で縦壁部22を挟み込むことで、しわ潰し工程を行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No. 13-2>
The
It was produced by the same method. In this example, the wrinkle crushing process was performed by sandwiching the
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図10に示す湾曲チャンネル部品の縦壁部42を、以下の点を除き、サンプルNo.11-1
と同じ方法で作製した。この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。
得られた湾曲チャンネル部品について、発生したしわを前記表2に基づいて評価した。その結果、使用したブランクの材質がいずれの場合でも、しわについては◎(目視検査で一切しわ無し)であった。 <Sample No. 13-3>
The
It was produced by the same method. In this example, the shear deformation process was performed using a blank heated to 300 ° C.
The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
図10に示す湾曲チャンネル部品の縦壁部42を、以下の点を除き、サンプルNo.11-1
と同じ方法で作製した。この例では、剪断変形工程を、300℃に加熱されたブランクを用いて行った。また、図11(b)の状態から、更にパンチ31とダイ37で縦壁部42を挟み込むことで、しわ潰し工程を行った。 <Sample No. 13-4>
The
It was produced by the same method. In this example, the shear deformation process was performed using a blank heated to 300 ° C. Further, from the state of FIG. 11 (b), the wrinkle crushing step was performed by sandwiching the
これらの結果を以下の表3~表5に示す。表3は、フランジ部を有する湾曲チャンネル部品を作製したNo.1-1~No.9-2の結果を、まとめて示したものである。表4は、フランジ部を有さない湾曲チャンネル部品を作製したNo.10-1~No.11-2の結果を、まとめて示したものである。表5はNo.12-1~No.13-4の結果をまとめて示しかものである。 The resulting curved channel part was evaluated for wrinkles generated based on Table 2. As a result, the wrinkle was 使用 (no wrinkles by visual inspection) regardless of the blank material used.
These results are shown in Tables 3 to 5 below. Table 3 summarizes the results of No. 1-1 to No. 9-2 in which curved channel parts having flange portions were produced. Table 4 summarizes the results of No. 10-1 to No. 11-2 in which curved channel parts having no flange portion were produced. Table 5 summarizes the results of No.12-1 to No.13-4.
サンプルNo.1-1~No.4-4では縦壁部の形成工程として、前記構成(3)または(4)の方法を採用している。よって、縦壁部を剪断変形工程のみで形成する場合は、前記構成(3)または(4)の方法を採用することで、全ての材料でしわの評価が良好な湾曲チャンネル部品を得ることができる。 From these results, the following can be understood.
In samples No. 1-1 to No. 4-4, the method of the above configuration (3) or (4) is adopted as the vertical wall forming step. Therefore, in the case where the vertical wall portion is formed only by the shear deformation process, by adopting the method of the above configuration (3) or (4), it is possible to obtain a curved channel component having an excellent evaluation of wrinkles with all materials. it can.
そのため、剪断変形工程で縦壁部に生じたしわが、ブランクの加熱および/またはしわ潰し工程を行っても(No.5-2~5-4,No.6-2~6-4)除去できなかった。 In samples No. 5-1 to No. 6-4, as the step of forming the vertical wall portion, the angle (θ) of the restrained outer portion with respect to the blank plate surface is 20 ° or 70 ° (30 A method of linearly moving in a direction that deviates from the range of 60 ° to 60 ° is employed.
Therefore, wrinkles generated in the vertical wall during the shear deformation process are removed even if the blank is heated and / or crushed (No. 5-2 to 5-4, No. 6-2 to 6-4). could not.
ここで、上述の実施例のでは、ブランクの加熱を300℃とした。<サンプルNo.1-3,1-4,2-3,2-4,3-3,3-4,4-3,4-4,7-3,7-4,8-3,8-4,10-3,10-4,13-3,13-4>について、加熱温度を600℃、700℃、900℃、1000℃とした場合についてそれぞれ別途実施した。結果は、上記の説明と同様の結果を得た。 However, even in these cases, the vertical wall portion is not formed only by the shear deformation force, but the vertical wall portion is formed by allowing the material to flow by applying an appropriate tension to the portion to be the vertical wall portion. It is possible to obtain a curved channel part in which wrinkle is improved by suppressing flange deformation and wrinkles are improved.
Here, in the above-described embodiment, the blank was heated to 300 ° C. <Sample Nos. 1-3, 1-4, 2-3, 2-4, 3-3, 3-4, 4-3,4-4, 7-3, 7-4, 8-3, 8- For 4,10-3,10-4,13-3,13-4>, the heating temperatures were 600 ° C., 700 ° C., 900 ° C., and 1000 ° C., respectively. As a result, the same results as described above were obtained.
ここでは、限られた数の実施形態を参照しながら説明したが、権利範囲はそれらに限定されるものではなく、上記の開示に基づく各実施形態の改変は当業者にとって自明なことである。 As described above, the entire contents of Japanese Patent Application No. 2014-171690 (filed on August 26, 2014), to which the present application claims priority, form part of the present disclosure by reference.
Although the present invention has been described with reference to a limited number of embodiments, the scope of rights is not limited thereto, and modifications of each embodiment based on the above disclosure are obvious to those skilled in the art.
11 ブランクの基部
11a 基部の境界側部分
11b 基部の中央部分
12 ブランクの変形部
12a 変形部縦壁部となる部分
12b 変形部の外方部
2 湾曲チャンネル部品
21 天板部
22 縦壁部
22a 縦壁部の湾曲部
24 フランジ部
24a フランジ部の湾曲部
4 湾曲チャンネル部品
41 天板部
42 縦壁部
42a 縦壁部の湾曲部 DESCRIPTION OF
Claims (11)
- 基部と、該基部に連続し縦壁部となる部分を含む変形部とを有する平板状の被加工材を、少なくとも前記基部と前記縦壁部との境界部で折り曲げる際に、前記基部側へ凸状に湾曲する湾曲部を持った前記縦壁部が形成されるプレス成形部品にプレス成形するプレス成形方法であって、
前記縦壁部の形成工程として、
前記基部の前記変形部との境界側の部分と、前記変形部の外方部とを別々に拘束し、前記変形部の前記縦壁部となる部分を板面内で剪断変形させて、前記縦壁部となる部分の外縁部に、前記湾曲部から、当該湾曲部から離れた部分に向かう材料の流れを生じさせる剪断変形工程を有することを特徴とするプレス成形方法。 When a flat plate-shaped workpiece having a base and a deformed portion including a portion that is continuous with the base and becomes a vertical wall is bent at least at the boundary between the base and the vertical wall, the base is moved toward the base. A press molding method for press molding to a press molded part in which the vertical wall portion having a curved portion that curves in a convex shape is formed,
As a process of forming the vertical wall portion,
The base side portion of the base portion and the outer portion of the deformable portion are separately restrained, and the portion that becomes the vertical wall portion of the deformable portion is subjected to shear deformation within a plate surface, A press molding method comprising: a shear deformation step of causing a material flow from the curved portion toward a portion away from the curved portion at an outer edge portion of a portion to be a vertical wall portion. - 前記縦壁部の形成工程では、前記平板状の被加工材の板厚方向からみて、
前記境界側の部分を拘束する第1の拘束部に対し、前記変形部の外方部を拘束する第2の拘束部が離隔した状態から、前記境界部を折り曲げるにつれて、前記第2の拘束部を、前記第1の拘束部と前記第2の拘束部との離隔距離が小さくなる方向に相対移動させることを特徴とする請求項1に記載のプレス成形方法。 In the step of forming the vertical wall portion, as viewed from the plate thickness direction of the flat plate-shaped workpiece,
The second constraining part is bent as the boundary part is bent from the state in which the second constraining part constraining the outer part of the deforming part is separated from the first constraining part constraining the boundary side part. The press forming method according to claim 1, wherein the first restraint portion and the second restraint portion are relatively moved in a direction in which a separation distance is reduced. - 前記剪断変形工程は、前記拘束された外方部を、前記縦壁部となる部分が、前記基部と前記変形部との境界線上の前記湾曲部の屈曲点を中心に回転するように移動させることにより行うことを特徴とする請求項2に記載のプレス成形方法。 In the shear deformation step, the constrained outer portion is moved so that a portion that becomes the vertical wall portion rotates around a bending point of the bending portion on a boundary line between the base portion and the deformation portion. The press molding method according to claim 2, wherein the press molding method is performed.
- 前記剪断変形工程は、前記拘束された外方部を、前記被加工材の板面に対する角度が30°以上60°以下となる方向に直線移動させることにより行うことを特徴とする請求項2に記載のプレス成形方法。 The shear deformation step is performed by linearly moving the constrained outer portion in a direction in which an angle with respect to a plate surface of the workpiece is 30 ° or more and 60 ° or less. The press molding method as described.
- 前記縦壁部の形成工程として、前記剪断変形工程を行った後に絞り成形工程を行うことを特徴とする請求項1~請求項4のいずれか1項に記載のプレス成形方法。 The press molding method according to any one of claims 1 to 4, wherein, as the step of forming the vertical wall portion, the drawing step is performed after the shear deformation step.
- 前記縦壁部の形成工程として、絞り成形工程を行った後に前記剪断変形工程を行うことを特徴とする請求項1~請求項4のいずれか1項に記載のプレス成形方法。 The press molding method according to any one of claims 1 to 4, wherein, as the forming step of the vertical wall portion, the shear deformation step is performed after the drawing step.
- 前記プレス成形部品は前記縦壁部の外側にフランジ部を有さず、
前記縦壁部の形成工程として、前記剪断変形工程を行った後にフォーム成形工程を行うことを特徴とする請求項1~請求項4のいずれか1項に記載のプレス成形方法。 The press-molded part does not have a flange part outside the vertical wall part,
The press molding method according to any one of claims 1 to 4, wherein a foam molding step is performed after the shear deformation step as the vertical wall portion forming step. - 前記剪断変形工程後に、前記縦壁部を金型で挟み込むことで、前記縦壁部に生じたしわを伸ばすしわ伸ばし工程を有することを特徴とする請求項1~請求項7のいずれか1項に記載のプレス成形方法。 8. The method according to claim 1, further comprising a wrinkle extending step of extending wrinkles generated in the vertical wall portion by sandwiching the vertical wall portion with a mold after the shear deformation step. The press molding method according to 1.
- 前記縦壁部の面に当接する前記金型のプレス面には、前記縦壁部の線長を稼ぐための凹凸が形成されていることを特徴とする請求項8に記載のプレス成形方法。 The press molding method according to claim 8, wherein the press surface of the mold that comes into contact with the surface of the vertical wall portion is provided with irregularities for increasing the line length of the vertical wall portion.
- 前記剪断変形工程を、300℃以上1000℃以下に加熱されたブランクに対して行うことを特徴とする請求項1~請求項9のいずれか1項に記載のプレス成形方法。 The press molding method according to any one of claims 1 to 9, wherein the shear deformation step is performed on a blank heated to 300 ° C or higher and 1000 ° C or lower.
- 基部と、該基部に連続し縦壁部となる部分を含む変形部とを有する平板状の被加工材を、少なくとも前記基部と前記縦壁部との境界部で折り曲げる際に、前記基部側へ凸状に湾曲する湾曲部を持った前記縦壁部が形成されるプレス成形部品にプレス成形するプレス成形部品の製造方法であって、
前記縦壁部の形成工程として、
前記基部の前記変形部との境界側の部分と、前記変形部の外方部とを別々に拘束し、前記変形部の前記縦壁部となる部分を板面内で剪断変形させて、前記縦壁部となる部分の外縁部に、前記湾曲部から、当該湾曲部から離れた部分に向かう材料の流れを生じさせる剪断変形工程を有することを特徴とするプレス成形部品の製造方法。 When a flat plate-shaped workpiece having a base and a deformed portion including a portion that is continuous with the base and becomes a vertical wall is bent at least at the boundary between the base and the vertical wall, the base is moved toward the base. A method of manufacturing a press-molded part that is press-molded into a press-molded part in which the vertical wall part having a curved part that curves convexly is formed,
As a process of forming the vertical wall portion,
The base side portion of the base portion and the outer portion of the deformable portion are separately restrained, and the portion that becomes the vertical wall portion of the deformable portion is subjected to shear deformation within a plate surface, A method for producing a press-molded part, comprising: a shear deformation step of causing a material flow from the curved portion toward a portion away from the curved portion at an outer edge portion of a portion to be a vertical wall portion.
Priority Applications (3)
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KR1020177005097A KR101940165B1 (en) | 2014-08-26 | 2015-08-10 | Press-molding method and method for producing press-molded component |
CN201580045759.4A CN106714997B (en) | 2014-08-26 | 2015-08-10 | The manufacturing method of press-processing method and stamping part |
MX2017002416A MX2017002416A (en) | 2014-08-26 | 2015-08-10 | Press-molding method and method for producing press-molded component. |
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JP2014171690A JP5954380B2 (en) | 2014-08-26 | 2014-08-26 | Press molding method and manufacturing method of press molded parts |
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JP (1) | JP5954380B2 (en) |
KR (1) | KR101940165B1 (en) |
CN (1) | CN106714997B (en) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019122978A (en) * | 2018-01-16 | 2019-07-25 | 本田技研工業株式会社 | Bending method and device therefor |
CN113329829A (en) * | 2019-01-25 | 2021-08-31 | 日本制铁株式会社 | Press forming method and press device |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111867747B (en) * | 2018-02-28 | 2022-05-13 | 杰富意钢铁株式会社 | Metal plate for press molding, press molding device, and method for manufacturing press member |
GB201814069D0 (en) * | 2018-08-29 | 2018-10-10 | Cambridge Entpr Ltd | Working of sheet metal |
JP6677289B1 (en) * | 2018-12-12 | 2020-04-08 | Jfeスチール株式会社 | Press molding method |
JP7111057B2 (en) * | 2019-05-15 | 2022-08-02 | Jfeスチール株式会社 | Press molding method |
CN112548578B (en) * | 2019-09-25 | 2023-07-21 | Ykk株式会社 | Method and apparatus for manufacturing component for button stopper |
JP7352123B1 (en) | 2023-04-04 | 2023-09-28 | 日本製鉄株式会社 | Manufacturing method of press molded products |
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WO1999037417A1 (en) * | 1998-01-23 | 1999-07-29 | Acera S.A. | Device for step-by-step bending of metal strips or sheets |
JP2001314918A (en) * | 2000-04-28 | 2001-11-13 | Mazda Motor Corp | Press forming method and apparatus |
JP2006320941A (en) * | 2005-05-19 | 2006-11-30 | Toyota Auto Body Co Ltd | Pressing method and press die |
JP2008055511A (en) * | 2006-08-31 | 2008-03-13 | Benteler Automobiltechnik Gmbh | Method of manufacturing metallic sheet member for automotive use from blank |
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JP2006075884A (en) * | 2004-09-10 | 2006-03-23 | Nippon Steel Corp | Press formation system, press formation method and computer program |
JP5073413B2 (en) * | 2007-08-21 | 2012-11-14 | 本田技研工業株式会社 | Press mold |
ES2965617T3 (en) * | 2010-05-19 | 2024-04-16 | Nippon Steel Corp | L-shaped components pressing forming method |
-
2014
- 2014-08-26 JP JP2014171690A patent/JP5954380B2/en active Active
-
2015
- 2015-08-10 MX MX2017002416A patent/MX2017002416A/en active IP Right Grant
- 2015-08-10 WO PCT/JP2015/004015 patent/WO2016031159A1/en active Application Filing
- 2015-08-10 CN CN201580045759.4A patent/CN106714997B/en not_active Expired - Fee Related
- 2015-08-10 KR KR1020177005097A patent/KR101940165B1/en active IP Right Grant
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JPH0739954A (en) * | 1993-07-31 | 1995-02-10 | Press Kogyo Kk | Press forming method provided with countermeasure for preventing wrinkle and wrinkle preventing mechanism |
JPH11123469A (en) * | 1997-10-15 | 1999-05-11 | Mazda Motor Corp | Flanging method and its device |
WO1999037417A1 (en) * | 1998-01-23 | 1999-07-29 | Acera S.A. | Device for step-by-step bending of metal strips or sheets |
JP2001314918A (en) * | 2000-04-28 | 2001-11-13 | Mazda Motor Corp | Press forming method and apparatus |
JP2006320941A (en) * | 2005-05-19 | 2006-11-30 | Toyota Auto Body Co Ltd | Pressing method and press die |
JP2008055511A (en) * | 2006-08-31 | 2008-03-13 | Benteler Automobiltechnik Gmbh | Method of manufacturing metallic sheet member for automotive use from blank |
WO2015008495A1 (en) * | 2013-07-19 | 2015-01-22 | Jfeスチール株式会社 | Press molding method |
Cited By (3)
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JP2019122978A (en) * | 2018-01-16 | 2019-07-25 | 本田技研工業株式会社 | Bending method and device therefor |
CN113329829A (en) * | 2019-01-25 | 2021-08-31 | 日本制铁株式会社 | Press forming method and press device |
CN113329829B (en) * | 2019-01-25 | 2022-12-16 | 日本制铁株式会社 | Press forming method and press device |
Also Published As
Publication number | Publication date |
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CN106714997A (en) | 2017-05-24 |
JP2016043403A (en) | 2016-04-04 |
JP5954380B2 (en) | 2016-07-20 |
KR20170036026A (en) | 2017-03-31 |
CN106714997B (en) | 2019-05-21 |
MX2017002416A (en) | 2017-05-23 |
KR101940165B1 (en) | 2019-04-11 |
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