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WO2018173997A1 - Moule de matrice destiné à un pliage asymétrique, ensemble de moule destiné à un pliage asymétrique, et procédé de traitement de pliage - Google Patents

Moule de matrice destiné à un pliage asymétrique, ensemble de moule destiné à un pliage asymétrique, et procédé de traitement de pliage Download PDF

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Publication number
WO2018173997A1
WO2018173997A1 PCT/JP2018/010741 JP2018010741W WO2018173997A1 WO 2018173997 A1 WO2018173997 A1 WO 2018173997A1 JP 2018010741 W JP2018010741 W JP 2018010741W WO 2018173997 A1 WO2018173997 A1 WO 2018173997A1
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Prior art keywords
bending
block
die
mold
asymmetric
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PCT/JP2018/010741
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English (en)
Japanese (ja)
Inventor
英俊 金
河 黄
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Amada Co Ltd
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Amada Holdings Co Ltd
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Publication date
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Publication of WO2018173997A1 publication Critical patent/WO2018173997A1/fr
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  • the present invention relates to a die for asymmetric bending used when performing asymmetric bending on a workpiece.
  • symmetrical bending means that both sides (front part and rear part) of the part corresponding to the bending line in the workpiece are symmetrical with respect to the vertical direction (vertical direction) when viewed from the side (one side in the mold length direction). Bending to be.
  • the symmetric bending means that both sides of the part corresponding to the bending line in the workpiece are bent at the same bending angle.
  • Asymmetric bending refers to bending so that both sides of a portion corresponding to a bending line in a workpiece are asymmetric with respect to the vertical direction when viewed from the side (one side in the mold length direction). Specifically, one side (front side portion) of the portion corresponding to the bending line in the workpiece is set to a first bending angle smaller than 45 °, and the other side (rear side portion) of the portion corresponding to the bending line in the workpiece is set to 45. Bending to a second bending angle greater than °.
  • a punch mold for asymmetric bending that can be attached to and detached from the lower end of the upper table in the press brake, and an asymmetric that can be attached to and detached from the upper end of the lower table in the press brake
  • An asymmetric bending mold set including a bending die mold is used. Further, a first punch inclined at the same angle as the first bending angle with respect to the horizontal direction (horizontal line) passing through the tip edge of the punch die is formed on the front side (front side portion) of the tip portion of the asymmetric punch die. A tip surface is formed.
  • a second punch tip surface that is inclined by the same angle as the second bending angle with respect to the horizontal direction passing through the tip edge of the punch die is formed on the back side (rear part) of the tip portion of the asymmetric punch die.
  • the machining groove (V groove) of the die mold for asymmetric bending is formed in a shape corresponding to the tip of the punch mold for asymmetric bending.
  • the horizontal component of the bending load that works at the corner (first shoulder round portion) on the back side (rear side) of the machining groove of the die mold is the corner on the front side (front side) of the machining groove of the die mold ( Compared to the horizontal component of the bending load that works in the second shoulder radius part), it becomes larger according to the difference between the second bending angle and the first bending angle.
  • a thrust load (a load in the front-rear direction) according to the difference between the second bending angle and the first bending angle acts on the mold set and the press brake.
  • the mold set or press brake will be damaged. Therefore, when asymmetric bending is performed on the workpiece, the workpiece thickness (plate thickness), material, and bending length (corresponding to the bending line) are used so that excessive thrust load does not act on the mold set and press brake.
  • the processing range (processing conditions) such as the length of the part was limited.
  • a method of reducing the thrust load acting on the mold set and the press brake by arranging a punch receiving member made of urethane in the machining groove of the die mold is also conceivable. In this case, the bending accuracy is lowered by the punch receiving member.
  • the present invention has been made paying attention to the above-described circumstances, and an object thereof is to provide a die mold for asymmetric bending and the like having a novel configuration.
  • a die mold for asymmetric bending (lower mold) used when performing asymmetric bending with respect to a workpiece by a press brake
  • a die mold having an accommodation recess on the upper side (upper side).
  • a first bending block for bending the side (front side portion) to a first bending angle smaller than 45 °, a biasing member for biasing the first bending block upward, and the accommodation of the die mold base Provided on the back side of the first bending block in the recess, and cooperates with the punch die to make the other side (rear part) of the part corresponding to the bending line in the workpiece to a second bending angle larger than 45 °.
  • a recessed processing step for allowing the tip of the punch die to enter is formed in a portion extending over the upper surface of the bending block.
  • the workpiece is positioned with respect to the die mold so that the portion corresponding to the bending line in the workpiece is located above the machining step. Thereafter, the punch die is moved downward, and the tip end portion of the punch die enters the processing step portion. Thereby, one side (front part) of the part corresponding to the bending line in the workpiece is sandwiched between the punch tip surface of the punch die and the back side (rear side) corner of the upper surface of the first bending block. The first bending angle can be bent. At the same time, the other side (rear part) of the part corresponding to the bending line in the workpiece can be bent to the first bending angle by the front side (front side) corner of the upper surface of the second bending block.
  • the punch die is further moved downward, the first bending block is moved downward against the urging force of the urging member, and the second bending block is moved to the upper surface of the first bending block. Project upward. Accordingly, the bending line in the workpiece is increased by the front corner portion of the upper surface of the second bending block while the distance between the front edge of the punch die and the upper corner portion of the second bending block is increased.
  • the other side (rear side portion) of the portion corresponding to can be bent from the first bending angle to the second bending angle.
  • the horizontal component of the bending load acting on the front side (front side) corner of the upper surface of the second bending block is the bending load acting on the rear side (rear side) corner of the upper surface of the first bending block. Compared to the horizontal component, it tends to increase according to the difference between the second bending angle and the first bending angle.
  • the other side (rear part) of the part corresponding to the bend line in the workpiece is bent from the first bending angle to the second bending angle, the front end edge of the punch die and the upper surface of the second bending block are faced.
  • the horizontal component of the bending load acting on the corner portion on the front side on the upper surface of the second bending block can be reduced. Therefore, when the workpiece is asymmetrically bent without providing a punch receiving member made of urethane in the die die, the die set consisting of the punch die and the die die, and the press brake The working thrust load (the load in the front-rear direction) can be reduced.
  • the second aspect of the present invention is a mold set for asymmetric bending used when performing asymmetric bending with respect to a workpiece by a press brake, and is attachable to and detachable from a lower end portion of an upper table in the press brake.
  • Punch die for asymmetric bending (upper die) having a punch tip surface inclined at the same angle as the first bending angle smaller than 45 ° with respect to the horizontal direction (horizontal line) passing through the tip edge on the front side of the tip portion Mold) and a die mold (lower mold) for asymmetric bending that is detachable from the upper end of the lower table in the press brake and has the configuration of the first aspect of the present invention. It is.
  • the front side (front side) of the tip is smaller than 45 ° with respect to the horizontal direction passing through the tip edge.
  • a die mold base for asymmetrical bending (upper mold) in which a punch tip surface inclined by the same angle as the first bending angle is formed, and having an accommodating recess in the upper part (upper side);
  • a first bending block provided in the housing recess of the die mold base so as to be movable in the vertical direction; and a back surface side (rear side) of the first bending block in the housing recess of the die mold base.
  • Top surface and said 2 Using a die mold (lower mold) for asymmetric bending in which a recessed processing step (processing recess) is formed in a portion extending over the upper surface of the bending block, the portion corresponding to the bending line in the workpiece is the processing step In a state where the punch die is positioned on the upper side of the punch die, the punch die is moved downward, and the tip end portion of the punch die is entered into the processing step portion.
  • the second bending block is simultaneously bent to the first bending angle by sandwiching one side (front side portion) of the portion corresponding to the bending line in the workpiece by the back side (rear side) corner of the upper surface of the first bending block.
  • a first bending step of bending the other side (rear side portion) of the portion corresponding to the bending line in the workpiece to a first bending angle by the front side (front side) corner portion of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface, and further lowering the punch die Move the first By moving the bending block downward and projecting the second bending block upward with respect to the upper surface of the first bending block, the tip edge of the punch die and the upper surface of the second bending block are placed.
  • the first bend of the other side (rear portion) of the part corresponding to the bending line in the workpiece is performed by the front corner of the upper surface of the second bending block.
  • the horizontal component of the bending load acting on the front side (front side) corner of the upper surface of the second bending block is the back side (rear side) of the upper surface of the first bending block.
  • the horizontal component of the bending load that works at the corner it tends to increase according to the difference between the second bending angle and the first bending angle.
  • the punch tip and the upper surface of the second bending block face the front side (front side).
  • FIG. 1 is a side view showing a mold set for asymmetric bending according to the first embodiment.
  • FIG. 2 is an enlarged side cross-sectional view showing a mold set for asymmetric bending according to the first embodiment.
  • FIG. 3A is a front view of the die mold for asymmetric bending according to the first embodiment, and FIG. 3B is a rear view of the die mold for asymmetric bending according to the first embodiment. is there.
  • FIGS. 4A and 4B are cross-sectional views for explaining the operation of the asymmetric bending mold set according to the first embodiment.
  • FIG.5 (a) is sectional drawing explaining operation
  • FIG.5 (b) is an expanded sectional view of the I section in Fig.5 (a).
  • FIG. 6 is a side view showing how a deep bent product is manufactured using the asymmetric bending die set according to the first embodiment.
  • FIG. 7 is a side view showing a mold set for asymmetric bending according to the second embodiment.
  • FIG. 8 is an enlarged side sectional view showing a mold set for asymmetric bending according to the second embodiment.
  • FIG. 9A is a front view of an asymmetric bending die die according to the second embodiment, and FIG.
  • FIGS. 10A and 10B are cross-sectional views illustrating the operation of the asymmetric bending mold set according to the second embodiment.
  • Fig.11 (a) is sectional drawing explaining operation
  • FIG.11 (b) is an expanded sectional view of the II section in Fig.11 (a). It is.
  • FIG. 12 is a side view showing how a deep bent product is manufactured using the asymmetric bending die set according to the second embodiment.
  • die width direction refers to the width direction of the asymmetric bending punch die or the asymmetric bending die die, and in the embodiment of the present invention, it refers to the front-rear direction.
  • Die length direction refers to the length direction of a punch mold for asymmetric bending or a die mold for asymmetric bending. In the embodiment of the present invention, it refers to the left-right direction. .
  • DA is the mold width direction
  • FF is the front direction (one side in the mold width direction)
  • FR is the rear direction (the other side in the mold width direction)
  • DB is the mold length direction
  • L is the left direction (one side of the mold length direction)
  • R is the right direction (the other side of the mold length direction)
  • U is the top direction.
  • the direction “D” indicates the downward direction.
  • the asymmetric bending die set 10 performs asymmetric bending on a plate-shaped workpiece (sheet metal) W by a press brake (only part of which is shown). It is a mold set used in the case. Further, the asymmetric bending die set 10 is a punch metal for asymmetric bending which is detachably attached to a lower end portion of an upper table 12 (only a part is shown) in a press brake via an intermediate plate 14 and a mounting bolt 16. It consists of a die 18 and a die die 24 for asymmetric bending that is detachably attached to an upper end portion of a lower table 20 (only a part is shown) in a press brake via a lower die holder 22.
  • the asymmetric bending punch die 18 extends in the die length direction DB (left-right direction).
  • a shank portion 26 for mounting the punch die 18 to the lower end portion of the upper table 12 is formed along the die length direction DB at the base end portion (upper end portion) of the punch die 18.
  • a first punch tip surface 18f is formed along the die length direction DB on the front side (front portion) of the tip portion of the punch die 18.
  • the first punch tip surface 18f of the punch die 18 has a first bending angle ⁇ 1 (see FIG. 5B) smaller than 45 ° with respect to the horizontal direction (horizontal line) passing through the tip edge 18t of the punch die 18. It is inclined by the same angle.
  • a second punch tip surface 18s is formed along the die length direction DB (left and right direction) on the back side (rear side portion) of the tip portion of the punch die 18.
  • the second punch tip surface 18s of the punch die 18 is the same angle as the second bending angle ⁇ 2 (see FIG. 5B) larger than 45 degrees with respect to the horizontal direction passing through the tip edge 18t of the punch die 18. Inclined.
  • the first bending angle ⁇ 1 is a bending angle on one side (front side portion) of the portion S ′ corresponding to the bending line in the workpiece W.
  • the first bending angle ⁇ 1 is 15 as an example. It is set to ⁇ 35 degrees.
  • the second bending angle ⁇ 2 is a bending angle on the other side (rear side portion) of the portion S ′ corresponding to the bending line in the workpiece W, and is set to 65 to 75 degrees as an example.
  • the portion corresponding to the bending line in the workpiece W refers to a portion that becomes a bending line S (see FIG. 5B) by bending.
  • the second punch tip surface 18s of the punch die 18 only needs to be inclined at a second bending angle ⁇ 2 or more with respect to the horizontal direction passing through the tip edge 18t of the punch die 18, and the tip edge of the punch die 18 You may incline 90 degree
  • the die mold 24 for asymmetric bending is a die mold base that can be attached to and detached from the upper end of the lower table 20 via a plurality of lower mold holders 22.
  • (Lower mold base) 28 is provided, and the die mold base 28 extends in the mold length direction DB (left-right direction).
  • an upper side (upper surface) of the die mold base 28 is an L-shaped die mold base main body 30 and a back fixed to the back surface of the die mold base main body 30 via a plurality of mounting bolts 32.
  • a plate 34 is provided.
  • the die mold base 28 has an accommodation recess 36 extending in the mold length direction DB on the upper side (upper side), and both sides of the accommodation recess 36 in the mold length direction DB are opened. .
  • one side (front part) of the portion S corresponding to the bending line in the workpiece W in cooperation with the first punch tip surface 18 f of the punch mold 18 is a first bending angle.
  • a first bending block 38 for bending to ⁇ 1 is provided.
  • the first bending block 38 extends in the mold length direction DB (left-right direction), and a first slidable contact surface 38f inclined with respect to the vertical direction is formed at the lower part of the first bending block 38 in the mold length. It is formed along the direction DB.
  • the first bending block 38 is configured to be movable in the vertical direction via a plurality of guide bolts 40.
  • the first bending block 38 is provided in the housing recess 36 of the die mold base 28 so as to be movable in the vertical direction via the plurality of guide bolts 40.
  • each guide bolt 40 is supported by a long hole 30h formed in the upper part of the die mold base body 30 so as to be movable in the vertical direction.
  • a coil spring 42 is provided below the guide bolts 40 in the die mold base body 30 as a first bending block urging member that urges the first bending block 38 upward.
  • a second bending block 44 is provided for bending the other side (rear part) of S to the second bending angle ⁇ 2.
  • the second bending block 44 extends in the mold length direction DB (left-right direction), and a second slidable contact surface 44s inclined with respect to the vertical direction is formed at the lower part of the second bending block 44 in the mold length. It is formed along the direction DB.
  • the second sliding contact surface 44 s of the second bending block 44 is adjacent to the first sliding contact surface 38 f of the first bending block 38.
  • the second bending block 44 is configured to be movable in the vertical direction via a plurality of guide bolts 46.
  • the second bending block 44 is provided on the back side of the first bending block 38 in the housing recess 36 of the die mold base 28 so as to be movable in the vertical direction via the plurality of guide bolts 46.
  • each guide bolt 46 is supported by a long hole 38h formed in the upper part of the back plate 34 so as to be movable in the vertical direction.
  • Each elongated hole 38h of the back plate 34 is provided with a coil spring 48 as a biasing member for a second bending block that biases the second bending block 44 downward.
  • a cam block 50 extending in the mold length direction DB (left-right direction) is provided on the bottom side of the housing recess 36 of the die mold base 28. Further, on one side FF (front side portion) in the mold width direction DA at the upper part of the cam block 50, the first cam surface 50f slidably contacting the first slidable contact surface 38f of the first bending block 38 is formed in the mold width direction DA. The first cam surface 50f is inclined with respect to the vertical direction. Furthermore, on the other side FR (rear part) of the mold length direction DB in the upper part of the cam block 50, the second cam surface 50s slidably contacting the second slidable contact surface 44s of the second bending block 44 has a mold length. The second cam surface 50s is inclined with respect to the vertical direction.
  • the cam block 50 is configured to be movable (displaceable) in the mold width direction DA (front-rear direction) via a plurality of guide bolts 52 (only one is shown).
  • the cam block 50 is provided on the bottom side of the housing recess 36 of the die mold base 28 so as to be movable in the mold width direction via the plurality of guide bolts 52.
  • Each guide bolt 52 is supported by a long hole 30b formed in the lower part (bottom part) of the die mold base body 30 so as to be movable in the mold width direction DA.
  • a plurality of support bolts 54 are provided on the front surface (front side surface) of the cam block 50 at intervals in the mold length direction DB. As shown in FIG. 2, each support bolt 54 is supported by a guide hole 30p formed in an intermediate portion of the die mold base body 30 so as to be movable in the mold width direction DA (front-rear direction). Further, between the head of each guide bolt 40 and the front surface of the die mold base body 30, there is a cam block attachment that urges the cam block 50 to one side FF (forward direction) in the mold width direction DA. A coil spring 56 as a biasing member is provided.
  • the cam block 50 resists the biasing force of the plurality of coil springs 56 and the other in the mold width direction DA. Move to the side (backward). Then, the second bending block 44 moves upward against the urging force of the plurality of coil springs 48.
  • the cam block 50 moves to one side (forward direction) in the mold width direction DA by the urging forces of the plurality of coil springs 56. To do. Then, the second bending block 44 moves downward by the gravity and the urging forces of the plurality of coil springs 48.
  • the second bending block 44 is configured to move in the direction opposite to the moving direction of the first bending block 38 in conjunction with the vertical movement of the first bending block 38.
  • a recessed processing step (processing recess) 58 for allowing the tip of the punch die 18 to enter is provided in the mold length direction DB ( (Horizontal direction).
  • a first rounded portion (first shoulder rounded portion) 38r is formed along the mold length direction DB at a corner on the back side (rear side) of the upper surface of the first bending block 38.
  • a second rounded portion (second shoulder rounded portion) 44r is formed along the mold length direction DB at the corner portion on the front side (front side) of the upper surface of the second bending block 44. ing.
  • the edge portion on the front side (front side) of the upper surface of the second bending block 44, or the first bending block 38. May be formed in a portion extending between the upper surface of the second bending block 44 and the upper surface of the second bending block 44.
  • the bending method according to the first embodiment is a method for performing asymmetric bending on a plate-shaped workpiece (sheet metal) W by a press brake, and includes a positioning step, a first bending step, and a second bending step. Bending process.
  • the workpiece W is positioned with respect to the die mold 24 so that the portion S ′ corresponding to the bending line in the workpiece W is positioned above the machining step portion 58 (positioning step). ).
  • the punch die 18 is moved downward by the lowering operation (downward movement operation) of the upper table 12, and the punch die is moved. 18 tip portions enter the processing step portion 58.
  • one side (front side portion) of the portion S ′ corresponding to the bending line in the workpiece W is sandwiched between the first punch tip surface 18f of the punch die 18 and the first rounded portion 38r of the first bending block 38. It is bent to the first bending angle ⁇ 1.
  • the other side (rear part) of the portion S ′ corresponding to the bending line in the workpiece W is sandwiched by the second punch tip surface 18s of the punch die 18 and the second rounded portion 44r of the second bending block 44. It is bent to 1 bending angle ⁇ 1.
  • both sides (front side portion and rear side portion) of the portion S ′ corresponding to the bending line in the workpiece W can be bent at the same bending angle (first bending angle ⁇ 1) (first bending step).
  • the punch die 18 is further moved downward by the lowering operation of the upper table 12, and the first bending block 38 is moved. It is moved downward against the urging force of the plurality of coil springs 42. Then, the second bending block 44 is moved upward against the urging force of the plurality of coil springs 48 and protrudes upward with respect to the upper surface of the first bending block 38.
  • the punch die 18 is moved upward by the upward movement (upward movement movement) of the upper table 12, and the first bending block 38 is moved upward by the urging forces of the plurality of coil springs 42. Moved in the direction. Then, the second bending block 44 is moved downward by the gravity and the urging forces of the plurality of coil springs 48. Thereby, the die mold 24, in other words, the mold set 10 can be returned to the original state.
  • the horizontal component F2h of the bending load F2 acting on the second round portion 44r of the second bending block 44 is the bending load acting on the first round portion 38r of the first bending block 38.
  • F1h of F1 it tends to increase according to the difference between the second bending angle ⁇ 2 and the first bending angle ⁇ 1.
  • the workpiece W is bent a plurality of times to reduce bending of the workpiece W on the front side (front side) of the press brake, while deeply bending the product M from the workpiece W. Can be produced.
  • the thrust load when performing asymmetric bending on the workpiece W can be reduced without providing the die mold 24 with a punch receiving member made of urethane. . Therefore, according to the first embodiment, when asymmetric bending is performed on the workpiece W by a press brake, the processing range (processing conditions such as the thickness, material, and bending length of the workpiece W is maintained while maintaining the bending accuracy. ) Can be expanded.
  • the asymmetric bending die set 60 according to the second embodiment includes the intermediate plate 14 and the mounting bolt 16 at the lower end of the upper table 12 (only part of which is shown) in the press brake. And a punch die 18 that can be attached and detached, and a die die 62 for asymmetric bending that can be attached and detached via a lower die holder 22 at the upper end of a lower table 20 (only part of which is shown) in the press brake.
  • the asymmetric bending mold set 60 according to the second embodiment is replaced with the asymmetric bending die mold 24 (see FIGS. 1 and 2) according to the first embodiment.
  • the die mold 62 for asymmetric bending according to the above is used.
  • the die mold 62 for asymmetric bending is a die mold base that can be attached to and detached from the upper end portion of the lower table 20 via a plurality of lower mold holders 22. 64, and the die mold base 64 extends in the mold length direction DB (left-right direction).
  • the die mold base 64 has an accommodation recess 66 extending in the mold length direction DB on the upper side (upper side) thereof, and both sides of the accommodation recess 66 in the mold length direction DB are opened. .
  • a first bending block 68 for bending to ⁇ 1 is provided in the mold length direction DB (left-right direction), and is configured to be movable in the up-down direction via a plurality of guide bolts 70.
  • the first concave block 68 extending in the mold length direction DB is provided in the housing recess 66 of the die mold base 64 so as to be movable in the vertical direction via the plurality of guide bolts 70.
  • Each guide bolt 70 is supported in a long hole 64h formed in the upper part of the die mold base 64 so as to be movable in the vertical direction.
  • a coil spring 72 is provided via a set screw 74 as a biasing member for biasing the first bending block 68 upward in the support hole 64b formed at the bottom of each elongated hole 64h in the die mold base body 30. ing.
  • a gas spring (not shown) or a hydraulic cylinder (not shown) may be used.
  • a second bending block 76 for bending the other side (rear portion) of S to the second bending angle ⁇ 2 is provided.
  • the second bending block 76 is detachably fixed to the die mold base 64 via a plurality of mounting bolts 78 (only one is shown).
  • a recessed processing step (processing recess) 80 for allowing the tip of the punch die 18 to enter is provided along the mold length direction DB. Is formed. Further, a first rounded portion (first shoulder rounded portion) 68r is formed along the mold length direction DB at a corner on the back side (rear side) of the upper surface of the first bending block 68. A second rounded portion (second shoulder rounded portion) 76r is formed along the mold length direction DB at a corner portion on the front side (front side) of the upper surface of the second bending block 76.
  • the rear edge (rear) edge of the upper surface of the first bending block 68, or the first bending block. 68 may be formed in a portion extending from the upper surface of 68 to the upper surface of the second bending block 76.
  • the bending method according to the second embodiment of the present invention is a method for performing asymmetric bending on a plate-shaped workpiece (sheet metal) W by a press brake, and includes a positioning step, a first bending step, And a second bending step.
  • the workpiece W is positioned with respect to the die mold 62 so that the portion S ′ corresponding to the bending line in the workpiece W is located above the machining step 80 (positioning step). .
  • the punch die 18 is moved downward by the lowering operation (downward movement operation) of the upper table 12, and the punch die is moved. 18 tip portions enter the processing step portion 80.
  • one side (front side portion) of the portion S ′ corresponding to the bending line in the workpiece W is sandwiched between the first punch tip surface 18 f of the punch die 18 and the first rounded portion 68 r of the first bending block 68. It can be bent up to one bending angle ⁇ 1.
  • the other side (rear part) of the portion S ′ corresponding to the bending line in the workpiece W is sandwiched by the second punch tip surface 18 s of the punch die 18 and the second rounded portion 76 r of the second bending block 76. It can be bent up to one bending angle ⁇ 1.
  • both sides (front side portion and rear side portion) of the portion S ′ corresponding to the bending line in the workpiece W can be bent at the same bending angle (first bending angle ⁇ 1) (first bending step).
  • the punch die 18 is moved further downward by the lowering operation of the upper table 12, and the first bending block 68 is moved. It is moved downward against the urging force of the plurality of coil springs 72. Then, the second bending block 76 is moved upward with respect to the first bending block 68 and protrudes upward with respect to the upper surface of the first bending block 38. As a result, the distance between the tip edge 18t of the punch die 18 and the second rounded portion 76r of the second bending block 76 is increased, and the second punch leading end surface 18s of the punch die 18 and the second bending block 76 first.
  • both sides (front side portion and rear side portion) of the portion corresponding to the bending line in the workpiece W can be bent at different bending angles (first bending angle ⁇ 1 and second bending angle ⁇ 2) (second bending step). ).
  • the punch die 18 is moved upward by the upward movement (upward movement movement) of the upper table 12, and the first bending block 68 is moved upward by the urging forces of the plurality of coil springs 72. Moved in the direction. Accordingly, the die mold 62, in other words, the mold set 60 can be returned to the original state.
  • the horizontal component F2h of the bending load F2 acting on the second round portion 76r of the second bending block 76 is the bending load acting on the first round portion 68r of the first bending block 68.
  • F1h of F1 it tends to increase according to the difference between the second bending angle ⁇ 2 and the first bending angle ⁇ 1.
  • the processing range (processing conditions) such as the thickness, material, and bending length of the workpiece is expanded while maintaining the bending accuracy. Can do.

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Abstract

L'invention concerne un premier bloc de pliage (38) coopérant avec une première surface de pointe de poinçon (18f) pour un moule de poinçon (18) pour plier un côté d'une partie (S) correspondant à une ligne de pliage dans une pièce (W) à un premier angle de courbure (θ1), qui est disposé de façon à être mobile verticalement par l'intermédiaire d'une pluralité de boulons de guidage (40) dans un évidement de logement (36) d'une base de moule de matrice (28). Un second bloc de pliage (44) coopérant avec une seconde surface de pointe de poinçon (18s) d'un moule de poinçon (18) pour plier l'autre côté de la partie (S) correspondant à la ligne de pliage dans la pièce (W) à un second angle de courbure (θ2) est disposé sur le côté de surface arrière du premier bloc de pliage (38) dans l'évidement de logement (36) de la base de moule de matrice (28). Une marche de traitement évidée (58) pour faire avancer la partie de pointe du moule de poinçon (18) est formée sur le bord du côté de surface arrière de la surface supérieure du premier bloc de pliage (38).
PCT/JP2018/010741 2017-03-21 2018-03-19 Moule de matrice destiné à un pliage asymétrique, ensemble de moule destiné à un pliage asymétrique, et procédé de traitement de pliage Ceased WO2018173997A1 (fr)

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JPS5617170B2 (fr) * 1978-11-15 1981-04-21
JPH06304661A (ja) * 1993-04-21 1994-11-01 Komatsu Ltd 曲げ加工機におけるワーク曲げ方法および曲げ装置
JP2764351B2 (ja) * 1991-02-08 1998-06-11 丸機械工業株式会社 折曲げ型
JP3125681U (ja) * 2006-07-18 2006-09-28 株式会社カワタ 曲げ台
JP4383931B2 (ja) * 2004-03-12 2009-12-16 株式会社アマダ ダイ

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JPS59114227U (ja) * 1983-01-19 1984-08-02 株式会社相沢鉄工所 プレスブレ−キの押し下げ型
KR101414471B1 (ko) * 2012-06-12 2014-08-06 곽성훈 절곡장치용 절곡금형

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JPS5617170B2 (fr) * 1978-11-15 1981-04-21
JP2764351B2 (ja) * 1991-02-08 1998-06-11 丸機械工業株式会社 折曲げ型
JPH06304661A (ja) * 1993-04-21 1994-11-01 Komatsu Ltd 曲げ加工機におけるワーク曲げ方法および曲げ装置
JP4383931B2 (ja) * 2004-03-12 2009-12-16 株式会社アマダ ダイ
JP3125681U (ja) * 2006-07-18 2006-09-28 株式会社カワタ 曲げ台

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