WO2012160703A1 - Moule pour presse à chaud - Google Patents

Moule pour presse à chaud Download PDF

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Publication number
WO2012160703A1
WO2012160703A1 PCT/JP2011/062133 JP2011062133W WO2012160703A1 WO 2012160703 A1 WO2012160703 A1 WO 2012160703A1 JP 2011062133 W JP2011062133 W JP 2011062133W WO 2012160703 A1 WO2012160703 A1 WO 2012160703A1
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WO
WIPO (PCT)
Prior art keywords
mold
molding surface
lower mold
cooling pipes
right direction
Prior art date
Application number
PCT/JP2011/062133
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English (en)
Japanese (ja)
Inventor
勲 野尻
愼治 石井
Original Assignee
トヨタ自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by トヨタ自動車株式会社 filed Critical トヨタ自動車株式会社
Priority to PCT/JP2011/062133 priority Critical patent/WO2012160703A1/fr
Publication of WO2012160703A1 publication Critical patent/WO2012160703A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • 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
    • B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment

Definitions

  • This invention relates to the metal mold
  • a workpiece such as a steel plate heated to a temperature at which an austenite structure appears or higher is pressed by a press device to which a die composed of an upper die and a lower die is attached, and at the same time, the die contacts the workpiece Hot press molding is widely known in which quenching is performed using cooling by means of cooling.
  • Patent Documents In hot press molding, a technique for cooling a mold by forming a water channel through which cooling water flows inside the mold and cooling the work well during quenching is known (for example, Patent Documents). 1).
  • the water channel as described above is generally formed linearly using a drill. Therefore, in a mold having a complicated curved molding surface, the distance from the water channel to the molding surface is partially different, which causes a problem that the molding surface cannot be cooled uniformly. As a result, there is a problem that a sufficient cooling rate cannot be ensured in a part of the workpiece during quenching, and the hardness of the workpiece is partially smaller than a desired value.
  • the mold is made of laminated steel material so that the distance from the water channel to the molding surface is made uniform and the molding surface is cooled uniformly. This is disadvantageous in that an expensive facility or the like is required for producing the material with laminated steel.
  • An object of the present invention is to provide a hot press mold capable of uniformly cooling a molding surface at a low price.
  • the hot press mold of the present invention is a hot press mold for forming a product by performing a pressing process on a heated workpiece and simultaneously cooling it, and the molding surfaces thereof face each other.
  • a plurality of cooling pipes through which a cooling medium flows are provided inside the lower mold and / or the upper mold, and the plurality of cooling pipes include: It is disposed in the vicinity of the molding surface of the lower mold and / or the upper mold provided with the plurality of cooling pipes, and is curved along the shape of the molding surface so that the distance from the molding surface is always equal. While extending.
  • the lower mold and / or the upper mold provided with the plurality of cooling pipes are formed with a plurality of cutting portions from the molding surface toward the inside,
  • the cutting part is formed along the shape of the molding surface so as to have a constant depth over the entire area of the lower mold and / or the upper mold where the plurality of cooling pipes are arranged. It is preferable that each cooling pipe is joined by a welding part in a state where the plurality of cooling pipes are respectively installed in the cutting parts.
  • a convex portion that protrudes toward the other molding surface along the front-rear direction is formed on one molding surface of the lower die and the upper die in the middle portion in the left-right direction.
  • the molding surface is formed continuously from the top surface extending in the left-right direction at the projecting end of the convex portion, and the both ends of the top surface in the left-right direction.
  • the molding surface is a bottom surface extending along the left-right direction at the deepest portion of the recess, Two side surfaces extending in the opposite direction to the recess direction of the concave portion from both end portions in the left-right direction of the bottom surface, and two side surfaces extending outward from the extending end portions of the two side surfaces in the left-right direction And a joint portion between the top surface and the two side surfaces in the molding surface on which the convex portions are formed, and the two side surfaces and the two base end surfaces in the molding surface on which the concave portions are formed.
  • the cutting part is formed in each convex R part of the lower mold and / or the upper mold provided with the plurality of cooling pipes, and the cooling part is provided with the cooling part located in each convex R part.
  • the weld is formed so as to embed the cooling pipe in a state where the pipe is installed so that its outer peripheral surface does not protrude from the molding surface of the lower mold and / or the upper mold provided with the cooling pipe,
  • the welded part formed in the cutting part located at each convex R part is formed to be flush with the molding surface of the lower mold and / or the upper mold on which the welded part is formed. Is preferred.
  • a convex portion that protrudes toward the other molding surface along the front-rear direction is formed on one molding surface of the lower die and the upper die in the middle portion in the left-right direction.
  • the other molding surface of the lower mold and the upper mold is continuously formed along the front-rear direction in the middle of the left-right direction, and is recessed along the front-rear direction.
  • the convex surface is formed with a top surface extending along the left-right direction at the projecting end of the convex portion, and the convex surface from both ends in the left-right direction of the top surface.
  • the cutting part is formed in the center part in the direction, and in the left-right direction of the top surface
  • the cooling pipe is installed in the cutting part located in the central part of the cutting part so that a part of its outer peripheral surface protrudes from the top face, and the cutting part located in the central part in the left-right direction of the top face. It is preferable that the installed cooling pipe has a shape in which an elliptical annular cross section is continuous along the front-rear direction, and is arranged so that the long side of the ellipse is parallel to the top surface.
  • the molding surface of the mold can be uniformly cooled, and cooling of the workpiece at a sufficient speed can be realized at a low price.
  • FIG. BB The perspective sectional view showing the metallic mold in a first embodiment of the present invention.
  • the mold 1 is a hot press mold that is attached to a predetermined press device (not shown) and produces a product by hot press molding a plate-like workpiece (not shown).
  • a predetermined press device not shown
  • the direction indicated by the arrow X in FIG. 1 is defined as the right and left direction as the right direction of the mold 1, the direction indicated by the arrow Y in FIG.
  • the vertical direction is defined with the direction indicated by the arrow Z in FIG.
  • the mold 1 is composed of a lower mold 10 and an upper mold 20 provided so that their molding surfaces face each other.
  • the lower mold 10 and the upper mold 20 are produced by NC processing a predetermined metal lump.
  • the lower mold 10 is a lower mold corresponding to the upper mold 20, and a convex part 11 protruding upward is formed on the molding surface (upper surface).
  • the convex part 11 is a part formed so that the molding surface of the lower mold 10 protrudes upward, and is continuous along the front-rear direction in the middle part (substantially central part) in the left-right direction of the molding surface of the lower mold 10. Is formed.
  • the top surface 10 a extending along the left-right direction at the projecting end portion (uppermost portion) of the convex portion 11, and the projecting direction of the convex portion 11 from both ends in the left-right direction of the top surface 10 a are
  • the side surfaces 10b and 10b extending in the reverse direction (downward) and the base end surfaces 10c and 10c extending outward from the extending end portions (lower end portions) of the side surfaces 10b and 10b in the left-right direction are so-called hats. It is formed as a mold-shaped molding surface, and the top surface 10 a and the side surfaces 10 b and 10 b are the molding surfaces of the protrusions 11.
  • the portions where the top surface 10a and the side surfaces 10b and 10b of the lower mold 10 are joined are formed as rounded convex R portions 12 and 12, respectively, and the side surfaces 10b and 10b and the base end surfaces 10c and 10c of the lower mold 10 are formed.
  • the portions to which are coupled are formed as rounded concave R portions 13 and 13, respectively.
  • the top surface 10a extends in the front-rear direction while being displaced in the up-down direction.
  • the side surfaces 10b and 10b extend in the front-rear direction while being displaced in the left-right direction. That is, the convex portion 11 extends in the front-rear direction while being displaced in the up-down direction and the left-right direction.
  • the base end surfaces 10c and 10c extend in the front-rear direction while the left-right dimension changes.
  • the molding surface (strictly speaking, the top surface 10a and the side surfaces 10b and 10b) of the lower mold 10 is formed as a predetermined uneven surface.
  • the lower mold 10 includes cooling pipes 14A and 14A, cooling pipes 14B and 14B, and cooling pipes 14C and 14C.
  • the cooling pipes 14A and 14A, the cooling pipes 14B and 14B, and the cooling pipes 14C and 14C are steel pipes in which a perfect circular cross section is continuous in the front-rear direction.
  • the cooling pipes 14A and 14A, the cooling pipes 14B and 14B, and the cooling pipes 14C and 14C are configured such that the internal spaces are in communication with each other and a cooling medium such as water is circulated by a pump or the like.
  • the cooling pipes 14 ⁇ / b> A and 14 ⁇ / b> A are steel pipes through which a cooling medium such as water flows and extend along the front-rear direction.
  • the cooling pipes 14A and 14A are embedded in the lower mold 10 and are arranged in the vicinity of the convex R portions 12 and 12, respectively.
  • the cooling pipes 14A and 14A are respectively used with a pipe bender or the like so that the distances from the side surfaces 10b and 10b are the same in the entire range in the front-rear direction and the distances from the top surface 10a are the same in the entire range in the front-rear direction.
  • the lower mold 10 is embedded in the lower mold 10 in a state in which it is bent along the shape of the molding surface (strictly speaking, the top surface 10a and the side surfaces 10b and 10b). Specifically, the welded portions 16A and 16A are formed so as to fill the cut portions 15A and 15A formed from the molding surface of the lower mold 10 toward the inside, and the cooling pipes 14A and 14A are respectively welded portions 16A and 16A. It is embedded in the inside.
  • the cutting parts 15A and 15A cut the lower mold 10 inward from the side surfaces 10b and 10b in the left and right directions at the convex R parts 12 and 12, respectively, and the lower mold 10 is moved downward from the top surface 10a. It is formed by cutting toward.
  • the cutting parts 15A and 15A are each formed in a substantially rectangular shape in cross-sectional view orthogonal to the front-rear direction.
  • the cutting portions 15A and 15A have a molding surface (strictly speaking, the top surface 10a and the top surface 10a) so as to have a constant depth (vertical dimension and lateral dimension) over the entire area of the lower mold 10 in the front-rear direction. It is formed along the shape of the side surfaces 10b and 10b).
  • the vertical and horizontal dimensions of the cutting parts 15A and 15A are set slightly larger than the outer diameter of the cooling pipes 14A and 14A.
  • the welded portions 16A and 16A are members that are formed so as to fill the cut portions 15A and 15A by overlay welding, and join the cooling pipes 14A and 14A and the cut portions 15A and 15A.
  • the welded portions 16A and 16A are formed over the entire area in the front-rear direction of the lower mold 10 so as to be flush with the molding surface of the lower mold 10 (strictly speaking, the top surface 10a and the side surfaces 10b and 10b). .
  • the welds 16A and 16A are formed as follows. That is, first, the cooling pipes 14A and 14A are installed in the cutting portions 15A and 15A so that the outer peripheral surfaces of the cooling pipes 14A and 14A do not protrude from the top face 10a and the side faces 10b and 10b.
  • build-up welding is performed on the cutting portions 15A and 15A in a state where the cooling pipes 14A and 14A are installed, and the welds protrude slightly upward from the top surface 10a, and extend downward from the side surfaces 10b and 10b along the left-right direction.
  • a build-up portion that slightly protrudes toward the outside of the mold 10 is formed.
  • the above-described build-up portion is the surface and surface of the lower mold 10 (strictly speaking, the top surface 10a and the side surfaces 10b and 10b).
  • the welded portions 16A and 16A are formed by cutting the surplus portion of the built-up portion (the portion protruding outward from the molding surface of the lower mold 10) so as to become one.
  • the welded portions 16A and 16A are made of a material having a hardness higher than the hardness of the lower mold 10 (strictly speaking, the portion excluding the cooling pipes 14A and 14A and the welded portions 16A and 16A in the lower mold 10). . Thereby, it is possible to improve the wear resistance of the convex R portions 12 and 12 that are easily worn during press working on the workpiece.
  • the cooling pipes 14B and 14B are steel pipes configured in substantially the same manner as the cooling pipes 14A and 14A, and extend along the front-rear direction.
  • the cooling pipes 14B and 14B are embedded in the lower mold 10 and are disposed on the side surfaces 10b and 10b in the vicinity of the concave R portions 13 and 13, respectively.
  • the cooling pipes 14B and 14B are formed on the molding surface of the lower mold 10 (strictly, the side surfaces 10b and 10b) using a pipe bender or the like so that the distances from the side surfaces 10b and 10b are equal in the entire range in the front-rear direction. It is embedded in the lower mold 10 in a state where the bending process is performed along the shape.
  • the welded portions 16B and 16B are formed so as to fill the cutting portions 15B and 15B formed from the molding surface of the lower mold 10 toward the inside, and the cooling pipes 14B and 14B are respectively welded portions 16B and 16B. It is embedded in the inside.
  • the cutting parts 15B and 15B are formed by cutting the lower mold 10 inward in the left-right direction from the side faces 10b and 10b in the vicinity of the concave R parts 13 and 13, respectively.
  • the cutting portions 15B and 15B are each formed in a substantially rectangular shape in cross-sectional view orthogonal to the front-rear direction.
  • the cutting portions 15B and 15B have the shape of the molding surface of the lower mold 10 (strictly, the side surfaces 10b and 10b) so that the depth (horizontal dimension) is constant over the entire area of the lower mold 10 in the front-rear direction. Are formed along.
  • the vertical and horizontal dimensions of the cutting parts 15B and 15B are set slightly larger than the outer diameter of the cooling pipes 14B and 14B.
  • the welded portions 16B and 16B are members that are formed so as to fill the cut portions 15B and 15B by overlay welding and join the cooling pipes 14B and 14B and the cut portions 15B and 15B.
  • the welded portions 16B and 16B are formed over the entire area in the front-rear direction of the lower mold 10 so as to be flush with the molding surface of the lower mold 10 (strictly speaking, the side surfaces 10b and 10b).
  • the welds 16B and 16B are formed as follows. That is, first, the cooling pipes 14B and 14B are installed in the cutting portions 15B and 15B so that the outer peripheral surfaces of the cooling pipes 14B and 14B do not protrude from the side faces 10b and 10b.
  • the cooling pipes 14C and 14C are steel pipes configured in substantially the same manner as the cooling pipes 14A and 14A, and extend along the front-rear direction.
  • the cooling pipes 14 ⁇ / b> C and 14 ⁇ / b> C are embedded in the lower mold 10 and arranged on the base end surfaces 10 c and 10 c side in the vicinity of the concave R portions 13 and 13, respectively.
  • the cooling pipes 14C and 14C are formed by using a pipe bender or the like so that the distances from the base end faces 10c and 10c are the same in the entire range in the front-rear direction. 10c) is embedded in the lower mold 10 in a state of being bent along the shape of 10c).
  • the welded portions 16C and 16C are formed so as to fill the cutting portions 15C and 15C formed from the molding surface of the lower mold 10 toward the inside, and the cooling pipes 14C and 14C are respectively welded portions 16C and 16C. It is embedded in the inside.
  • the cutting parts 15C and 15C are formed by cutting the lower mold 10 downward from the base end faces 10c and 10c in the vicinity of the concave R parts 13 and 13, respectively.
  • the cutting portions 15C and 15C are each formed in a substantially rectangular shape in cross-sectional view orthogonal to the front-rear direction.
  • the shape of the molding surface of the lower mold 10 (strictly, the base end faces 10c and 10c) is such that the cutting portions 15C and 15C have a constant depth (vertical dimension) over the entire area in the front-rear direction of the lower mold 10. It is formed along.
  • the vertical and horizontal dimensions of the cutting parts 15C and 15C are set slightly larger than the outer diameter of the cooling pipes 14C and 14C.
  • the welded portions 16C and 16C are members that are formed so as to fill the cut portions 15C and 15C by overlay welding, and join the cooling pipes 14C and 14C and the cut portions 15C and 15C.
  • the welded portions 16C and 16C are formed over the entire area in the front-rear direction of the lower mold 10 so as to be flush with the molding surface of the lower mold 10 (strictly speaking, the base end surfaces 10c and 10c).
  • the welds 16C and 16C are formed as follows. That is, first, the cooling pipes 14C and 14C are installed in the cutting portions 15C and 15C so that the outer peripheral surfaces of the cooling pipes 14C and 14C do not protrude from the base end faces 10c and 10c.
  • the cooling pipes 14A and 14A are respectively arranged so that the distances from the side surfaces 10b and 10b are equal in the entire range in the front-rear direction and the distances from the top surface 10a are equal in the entire range in the front-rear direction.
  • the cooling pipes 14B and 14B are embedded inside the lower mold 10 so that the distances from the side surfaces 10b and 10b are equal in the entire range in the front-rear direction.
  • the cooling pipes 14C and 14C are embedded in a curved state in the lower mold 10 so that the distances from the base end faces 10c and 10c are equal in the entire range in the front-rear direction.
  • cooling pipes 14A and 14A, cooling pipes are formed so that the molding surface of the cut surface (see FIG. 2) perpendicular to the front-rear direction of the lower mold 10 is uniformly cooled.
  • 14B and 14B and cooling pipes 14C and 14C) can uniformly cool the molding surface of the lower mold 10 in the entire range.
  • the upper mold 20 is an upper mold corresponding to the lower mold 10, and the molding surface (lower surface) has a concave portion 21 that is recessed upward in accordance with the shape of the convex portion 11. Is formed.
  • the concave portion 21 is a portion formed so that the molding surface of the upper mold 20 is recessed upward, and is continuously formed along the front-rear direction in a midway portion (substantially central portion) in the left-right direction of the molding surface of the upper mold 20. Has been.
  • the bottom surface 20 a extending along the left-right direction at the deepest portion (uppermost portion) of the recess 21, and the direction in which the recess 21 is recessed from the both ends in the left-right direction of the bottom surface 20 a (downward)
  • Side surfaces 20b and 20b extending in the horizontal direction, and base end surfaces 20c and 20c extending outwardly in the left-right direction from the extended end portions (lower end portions) of the side surfaces 20b and 20b are so-called hat-shaped molding surfaces.
  • the bottom surface 20 a and the side surfaces 20 b and 20 b are the molding surfaces of the recess 21.
  • the portions where the side surfaces 20b and 20b and the base end surfaces 20c and 20c of the upper mold 20 are joined are formed as rounded convex R portions 22 and 22, respectively, and the bottom surface 20a and the side surfaces 20b and 20b of the upper mold 20 are formed.
  • the joint portions are formed as rounded concave R portions 23 and 23, respectively.
  • the bottom surface 20a extends in the front-rear direction while being displaced in the vertical direction, similar to the top surface 10a.
  • the side surfaces 20b and 20b extend in the front-rear direction while being displaced in the left-right direction in substantially the same manner as the side surfaces 10b and 10b. That is, the recess 21 extends in the front-rear direction while being displaced in the up-down direction and the left-right direction in substantially the same manner as the protrusion 11. Further, along with the displacement of the recess 21 (strictly speaking, the side surfaces 20b and 20b), the base end surfaces 20c and 20c extend in the front-rear direction while the left-right dimension changes.
  • the molding surface of the upper mold 20 (strictly speaking, the bottom surface 20a and the side surfaces 20b and 20b) is substantially the same as the molding surface of the lower mold 10 (strictly, the top surface 10a and the side surfaces 10b and 10b), It is formed as a predetermined uneven surface.
  • the upper mold 20 includes cooling pipes 24A and 24A, cooling pipes 24B and 24B, and cooling pipes 24C and 24C.
  • the cooling pipes 24A and 24A, the cooling pipes 24B and 24B, and the cooling pipes 24C and 24C are configured such that the internal spaces communicate with each other and a cooling medium such as water is circulated by a pump or the like.
  • the cooling pipes 24A and 24A are steel pipes through which a cooling medium such as water flows, and extend in the front-rear direction.
  • the cooling pipes 24A and 24A are embedded in the upper mold 20 and are disposed in the vicinity of the convex R portions 22 and 22, respectively.
  • the cooling pipes 24A and 24A are arranged so that the distance from the side surfaces 20b and 20b is equal in the entire range in the front-rear direction, and the distance from the base end surfaces 20c and 20c is equal in the entire range in the front-rear direction.
  • the upper mold 20 is embedded in the upper mold 20 in a state in which the upper mold 20 is bent along the shape of the molding surface (strictly speaking, the side surfaces 20b and 20b and the base end surfaces 20c and 20c).
  • the welded portions 26A and 26A are formed so as to fill the cut portions 25A and 25A formed from the molding surface of the upper mold 20 to the inside, and the cooling pipes 24A and 24A are respectively welded portions 26A and 26A. It is embedded in the inside.
  • the cutting portions 25A and 25A respectively cut the upper die 20 from the side surfaces 20b and 20b outward in the left-right direction at the convex R portions 22 and 22, respectively, and the upper die 20 from the base end surfaces 20c and 20c. It is formed by cutting downward.
  • the cutting portions 25A and 25A are each formed in a substantially rectangular shape in cross-sectional view orthogonal to the front-rear direction.
  • the cutting portions 25A and 25A are formed on the molding surface (strictly, the side surfaces 10b and 10b) of the upper die 20 so that the cutting portions 25A and 25A have a constant depth (vertical and horizontal dimensions) over the entire area of the upper die 20 in the longitudinal direction. And the base end faces 20c and 20c).
  • the vertical and horizontal dimensions of the cutting portions 25A and 25A are set slightly larger than the outer diameter of the cooling pipes 24A and 24A.
  • the welded portions 26A and 26A are members that are formed so as to fill the cutting portions 25A and 25A by overlay welding, and join the cooling pipes 24A and 24A and the cutting portions 25A and 25A.
  • the welded portions 26A and 26A are formed over the entire area in the front-rear direction of the upper mold 20 so as to be flush with the molding surfaces of the upper mold 20 (strictly speaking, the side surfaces 20b and 20b and the base end surfaces 20c and 20c). ing.
  • the welds 26A and 26A are formed as follows.
  • the cooling pipes 24A and 24A are installed in the cutting portions 25A and 25A so that the outer peripheral surfaces of the cooling pipes 24A and 24A do not protrude from the side faces 20b and 20b and the base end faces 20c and 20c.
  • overlay welding is performed on the cutting portions 25A and 25A in a state where the cooling pipes 24A and 24A are installed, and slightly protrudes from the side surfaces 20b and 20b toward the inside of the upper mold 20 along the left and right directions, And the build-up part which protrudes a little below from base end surface 20c * 20c is formed.
  • the above-described overlay portion is the molding surface of the upper mold 20 (strictly speaking, the side surfaces 20b and 20b and the base end surfaces 20c and 20c). Then, the welded portions 26 ⁇ / b> A and 26 ⁇ / b> A are formed by cutting the surplus portion of the build-up portion (the portion protruding outward from the molding surface of the upper mold 20) so as to be flush with each other.
  • the welded portions 26A and 26A are made of a material having a hardness higher than the hardness of the upper die 20 (strictly, the portions other than the cooling pipes 24A and 24A and the welded portions 26A and 26A in the upper die 20). . Thereby, it is possible to improve the wear resistance of the convex R portions 22 and 22 that are easily worn during press working on the workpiece.
  • the cooling pipes 24B and 24B are steel pipes configured in substantially the same manner as the cooling pipes 24A and 24A, and extend along the front-rear direction.
  • the cooling pipes 24B and 24B are embedded in the upper mold 20 and are disposed on the side surfaces 20b and 20b near the concave R portions 23 and 23, respectively.
  • the cooling pipes 24B and 24B are formed on the molding surface of the upper mold 20 (strictly, the side surfaces 20b and 20b) using a pipe bender or the like so that the distances from the side surfaces 20b and 20b are equal in the entire range in the front-rear direction. It is embedded in the upper mold 20 in a state where the bending process is performed along the shape.
  • the welded portions 26B and 26B are formed so as to fill the cutting portions 25B and 25B formed from the molding surface of the upper mold 20 toward the inside, and the cooling pipes 24B and 24B are respectively welded portions 26B and 26B. It is embedded in the inside.
  • the manner in which the cooling pipes 24B and 24B are embedded in the upper mold 20 is substantially the same as the manner in which the cooling pipes 14B and 14B are embedded in the lower mold 10, and therefore the cutting portions 25B and 25B and the welded portions 26B and 26B Detailed description is omitted.
  • the cooling pipes 24C and 24C are steel pipes configured in substantially the same manner as the cooling pipes 24A and 24A, and extend along the front-rear direction.
  • the cooling pipes 24 ⁇ / b> C and 24 ⁇ / b> C are embedded in the upper mold 20 and are disposed on the bottom surface 20 a side in the vicinity of the concave R portions 23 and 23, respectively.
  • the cooling pipes 24 ⁇ / b> C and 24 ⁇ / b> C follow the shape of the molding surface (strictly speaking, the bottom surface 20 a) of the upper mold 20 using a pipe bender or the like so that the distance from the bottom surface 20 a is the same in the entire range in the front-rear direction. It is embedded in the upper mold 20 in a state where the bending process is performed.
  • the welded portions 26C and 26C are formed so as to fill the cutting portions 25C and 25C formed from the molding surface of the upper mold 20 toward the inside, and the cooling pipes 24C and 24C are respectively welded portions 26C and 26C. It is embedded in the inside.
  • the manner in which the cooling pipes 24C and 24C are embedded in the upper mold 20 is substantially the same as the manner in which the cooling pipes 14C and 14C are embedded in the lower mold 10, so that the cutting portions 25C and 25C and the weld portions 26C and 26C Detailed description is omitted.
  • the cooling pipes 24A and 24A have the same distance from the side surfaces 20b and 20b in the entire range in the front-rear direction, and the distance from the base end surfaces 20c and 20c is equal in the entire range in the front-rear direction.
  • the cooling pipes 24B and 24B were embedded in the upper mold 20 in a curved state, and the cooling pipes 24B and 24B were curved into the upper mold 20 so that the distances from the side surfaces 20b and 20b were equal in the entire range in the front-rear direction.
  • the cooling pipes 24 ⁇ / b> C and 24 ⁇ / b> C are embedded in a curved state in the upper mold 20 so that the distance from the bottom surface 20 a is equal in the entire range in the front-rear direction.
  • cooling pipes 24A and 24A cooling pipes
  • the molding surface of the cut surface are formed so that the molding surface of the cut surface (see FIG. 5) orthogonal to the front-rear direction of the upper mold 20 is uniformly cooled.
  • 24B and 24B and cooling pipes 24C and 24C the molding surface of the upper mold 20 can be uniformly cooled over the entire range.
  • a plurality of cooling pipes are arranged in the vicinity of the molding surface inside the mold 1, and the distances from the molding surfaces adjacent to each other are equal in the entire range in the front-rear direction. It extends along the front-rear direction while curving along the shape of the molding surface. Thereby, it becomes possible to cool the shaping
  • the plurality of cooling pipes are arranged so that the molding surface of the mold 1 is uniformly cooled on the cut surface (see FIGS. 2 and 5) orthogonal to the front-rear direction of the mold 1. It shall be.
  • the cooling pipe is completely embedded in the mold 1.
  • the outer peripheral surface of the cooling pipe is a part of the molding surface of the mold 1.
  • the cooling pipe can be embedded in the mold 1.
  • FIG. 6 shows only the cooling pipes 14 ⁇ / b> A and 14 ⁇ / b> A arranged near the convex R portions 12 and 12 of the lower mold 10.
  • a plurality of cooling pipes are provided in both the lower mold 10 and the upper mold 20, but a configuration in which a plurality of cooling pipes are provided in at least one of the lower mold 10 and the upper mold 20 may be adopted. Is possible.
  • the convex part 11 and the recessed part 21 are each formed in the lower mold
  • the cooling pipe is curved along the shape of the molding surface of the mold 1 and extended along the front-rear direction.
  • the present invention is not limited to this. A configuration including a portion extending along the front-rear direction and a portion extending along the left-right direction is also possible.
  • the mold 100 is a hot press mold that is attached to a predetermined press apparatus (not shown) and produces a product by hot press molding a plate-like workpiece (not shown).
  • the vertical direction in FIG. 7 is defined as the vertical direction of the mold 100
  • the horizontal direction in FIG. 7 is defined as the horizontal direction of the mold 100.
  • the front side of the paper surface in FIG. 7 is defined as the front side of the mold 100
  • the back side of the paper surface is defined as the rear side of the mold 100.
  • the mold 100 includes a lower mold 110 and an upper mold 120 that are provided so that their molding surfaces face each other.
  • the lower mold 110 and the upper mold 120 are manufactured by NC processing a predetermined metal lump.
  • the lower mold 110 is a lower mold corresponding to the upper mold 120, and a convex portion 111 protruding upward is formed on the molding surface (upper surface).
  • the convex part 111 is a part formed so that the molding surface of the lower mold 110 protrudes upward, and is continuous along the front-rear direction in the middle part (substantially central part) in the left-right direction of the molding surface of the lower mold 110. Is formed.
  • a top surface 110a extending along the left-right direction at the top of the convex portion 111, side surfaces 110b, 110b extending downward from both ends in the left-right direction of the top surface 110a, and side surfaces 110b,
  • the base end surfaces 110c and 110c extending outward from the lower end of the 110b in the left-right direction are formed as so-called hat-shaped forming surfaces, and the top surface 110a and the side surfaces 110b and 110b are formed of the convex portion 111. It is a surface.
  • the molding surface (strictly speaking, the top surface 110a and the side surfaces 110b and 10b) of the lower mold 110 is formed as a predetermined uneven surface substantially similar to the molding surface of the lower mold 10.
  • the lower mold 110 includes a cooling pipe 114.
  • the lower mold 110 is abbreviated as a plurality of cooling pipes (cooling pipes 14A and 14A, cooling pipes 14B and 14B, and cooling pipes 14C and 14C) provided in the lower mold 10. It is assumed that a plurality of cooling pipes configured similarly are provided.
  • the cooling pipe 114 is a steel pipe through which a cooling medium such as water flows, and extends along the front-rear direction.
  • the cooling pipe 114 has a shape in which an elliptical annular cross section is continuous along the front-rear direction, and the long side of the ellipse is embedded in the lower mold 110 in a state of being substantially parallel to the top surface 110a. It arrange
  • the cooling pipe 114 is formed on the molding surface (strictly speaking, the top surface 110a) of the lower mold 110 by using a pipe bender or the like so that the distance (projecting dimension) from the top surface 110a is the same in the entire range in the front-rear direction. It is installed in the lower mold 110 in a state where the bending process along the shape is performed. Specifically, the cooling pipe 114 and the cutting part 115 are joined by the welding part 116 in a state where the cooling pipe 114 is installed in the cutting part 115 formed from the top surface 110a of the lower mold 110 toward the inside. .
  • the cutting part 115 is formed by cutting the lower mold 110 downward from the top surface 110a at the center in the left-right direction of the top surface 110a.
  • the cutting part 115 is formed in a substantially rectangular shape in a cross-sectional view orthogonal to the front-rear direction.
  • the cutting part 115 is formed along the shape of the molding surface (strictly speaking, the top surface 110a) of the lower mold 110 so as to have a constant depth (vertical dimension) over the entire area in the front-rear direction of the lower mold 110. Has been.
  • the vertical dimension of the cutting part 115 is set slightly smaller than the length of the short side of the ellipse in the cross section of the cooling pipe 114, and the horizontal dimension of the cutting part 115 is about the same as the length of the long side of the ellipse in the cross section of the cooling pipe 114. Is set to
  • the welded portion 116 is formed by performing welding so that the cooling pipe 114 and the cutting portion 115 are joined in a state where the lower portion of the cooling pipe 114 is installed in the cutting portion 115. It is formed over.
  • the cooling pipe 114 is embedded in the lower mold 110 with the long side of the ellipse in the cross section substantially parallel to the top surface 110 a, and the upper part of the outer peripheral surface of the cooling pipe 114 is the top of the lower mold 110. It arrange
  • the cooling pipe 114 is curved so that the distance (protrusion dimension) from the top surface 110a is the same in the entire range in the front-rear direction. Thereby, the contact area of the cooling pipe 114 with respect to a product can be made uniform in the front-back direction. Therefore, the product can be cooled by the cooling pipe 114 uniformly over the entire range in the front-rear direction.
  • the upper mold 120 is an upper mold corresponding to the lower mold 110. Note that the upper mold 120 is configured in substantially the same manner as the upper mold 20, and thus detailed description thereof is omitted. Although not shown, the upper mold 120 is abbreviated as a plurality of cooling pipes (cooling pipes 24A and 24A, cooling pipes 24B and 24B, and cooling pipes 24C and 24C) provided in the upper mold 20. It is assumed that a plurality of cooling pipes configured similarly are provided.
  • the cooling pipe 114 having an elliptical annular cross section is provided so that the upper part protrudes upward from the top surface 110a of the lower mold 110, but the lower part faces the top surface 110a of the upper mold 120. It is also possible to provide a mold 100 which is provided so as to protrude downward from the molding surface and has a configuration in which a product having a shape in which a portion in contact with the cooling pipe 114 protrudes downward is formed. Even in this case, at the time of quenching, it is possible to cool the portion of the product that is difficult to remove heat (the portion corresponding to the top surface 110a) at a sufficient speed, and to prevent the hardness of the portion from becoming smaller than a desired value. can do.
  • die in each said embodiment was taken as the structure which consists of the lower mold
  • the present invention can be used in a hot press mold that performs cooling at the same time as pressing a heated workpiece.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

L'invention porte sur un moule peu coûteux pour une presse à chaud à l'aide duquel il est possible d'obtenir un refroidissement uniforme de la surface de moulage. Le moule (1) est équipé d'un moule inférieur (10) et d'un moule supérieur (20), qui sont disposés de telle sorte que leurs surfaces de moulage soient face à face. Des tubes de refroidissement (14A/14A) et des tubes de refroidissement (14B/14B) et des tubes de refroidissement (14C/14C) sont agencés dans l'intérieur du moule inférieur (10) et des tubes de refroidissement (24A/24A), des tubes de refroidissement (24B/24B) et des tubes de refroidissement (24C/24C) sont agencés dans l'intérieur du moule supérieur (20). Les tubes de refroidissement (14A/14A), les tubes de refroidissement (14B/14B) et les tubes de refroidissement (14C/14C) sont agencés à proximité de la surface de moulage du moule inférieur (10), une extension et une courbure étant en accord avec la forme de la surface de moulage adjacente du moule inférieur (10) de manière à rester à la même distance de la surface de moulage du moule inférieur (10) et les tubes de refroidissement (24A/24A), les tubes de refroidissement (24B/24B) et les tubes de refroidissement (24C/24C) sont agencés à proximité de la surface de moulage du moule supérieur (20), en s'étendant et en s'incurvant en accord avec la forme de la surface de moulage adjacente du moule supérieur (20) de manière à rester à la même distance de la surface de moulage du moule supérieur (20).
PCT/JP2011/062133 2011-05-26 2011-05-26 Moule pour presse à chaud WO2012160703A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/062133 WO2012160703A1 (fr) 2011-05-26 2011-05-26 Moule pour presse à chaud

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Application Number Priority Date Filing Date Title
PCT/JP2011/062133 WO2012160703A1 (fr) 2011-05-26 2011-05-26 Moule pour presse à chaud

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WO2012160703A1 true WO2012160703A1 (fr) 2012-11-29

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103350147A (zh) * 2013-07-24 2013-10-16 陈扬 基于硼钢钢管的热成形模具的冷却气体直冷工艺及装置
CN107214246A (zh) * 2017-06-27 2017-09-29 重庆理工大学 层片式结构热冲压模具及其凸模和凹模的加工方法
CN109985968A (zh) * 2017-12-29 2019-07-09 明信汽车科技株式会社 烫印模具装置
WO2021020589A1 (fr) * 2019-08-01 2021-02-04 株式会社ジーテクト Matrice, et son procédé de fabrication

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5656731A (en) * 1979-10-13 1981-05-18 Honda Eng Kk Production of punch and die in drawing die
JPS60186931U (ja) * 1984-05-24 1985-12-11 三菱自動車工業株式会社 プレス金型冷却装置
JPS63126912U (fr) * 1987-02-06 1988-08-19
JPH10291070A (ja) * 1997-04-21 1998-11-04 Honda Motor Co Ltd プレス型の加工方法
JP2005007442A (ja) * 2003-06-19 2005-01-13 Yoshihiro Kato プレス装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5656731A (en) * 1979-10-13 1981-05-18 Honda Eng Kk Production of punch and die in drawing die
JPS60186931U (ja) * 1984-05-24 1985-12-11 三菱自動車工業株式会社 プレス金型冷却装置
JPS63126912U (fr) * 1987-02-06 1988-08-19
JPH10291070A (ja) * 1997-04-21 1998-11-04 Honda Motor Co Ltd プレス型の加工方法
JP2005007442A (ja) * 2003-06-19 2005-01-13 Yoshihiro Kato プレス装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103350147A (zh) * 2013-07-24 2013-10-16 陈扬 基于硼钢钢管的热成形模具的冷却气体直冷工艺及装置
CN107214246A (zh) * 2017-06-27 2017-09-29 重庆理工大学 层片式结构热冲压模具及其凸模和凹模的加工方法
CN109985968A (zh) * 2017-12-29 2019-07-09 明信汽车科技株式会社 烫印模具装置
JP2019118957A (ja) * 2017-12-29 2019-07-22 エムエス オートテック カンパニー リミテッドＭｓ Ａｕｔｏｔｅｃｈ Ｃｏ．，Ｌｔｄ． ホットスタンピング金型装置
CN109985968B (zh) * 2017-12-29 2021-04-06 明信汽车科技株式会社 热冲压成形模具装置
WO2021020589A1 (fr) * 2019-08-01 2021-02-04 株式会社ジーテクト Matrice, et son procédé de fabrication
JP2021023950A (ja) * 2019-08-01 2021-02-22 株式会社ジーテクト 金型および金型の製造方法

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