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JP-2026074576-A - Progressive die press

JP2026074576AJP 2026074576 AJP2026074576 AJP 2026074576AJP-2026074576-A

Abstract

[Problem] To provide a progressive press device that suppresses vertical vibration of the workpiece. [Solution] The present disclosure relates to a progressive press device for transporting a sheet-shaped workpiece W and punching out the workpiece W, comprising an upper die located above the workpiece W and a lower die 21 located below the workpiece W, wherein the lower die 21 is provided with guides 25 at both ends in the width direction of the workpiece W on which the workpiece W is placed when punching out the workpiece W, and the guides 25 are provided with restricting portions 25e that restrict the central part of the workpiece W in the width direction from being pulled upward. [Selection Diagram] Figure 3

Inventors

  • 片桐 鷹英
  • 井下 寛史
  • 岩本 雄磨
  • 吉長 大豪
  • 牧 正幸

Assignees

  • トヨタ自動車株式会社
  • 株式会社アイシン

Dates

Publication Date
20260507
Application Date
20241021

Claims (4)

  1. A progressive press machine that transports a sheet-shaped workpiece and punches out the workpiece, It has an upper mold located above the workpiece and a lower mold located below the workpiece. The lower die is provided with guides at both ends in the width direction of the workpiece, on which the workpiece is placed when punching it out. The guide is provided with a restricting portion that prevents the central part of the workpiece in the width direction from being pulled upward. Progressive die press machine.
  2. At both ends of the workpiece in the width direction, a downwardly bent portion is formed. The regulating portion is a wall portion formed by a wall extending in the vertical direction, The bent portion of the workpiece is positioned on the outside of the wall portion in the width direction of the workpiece. The progressive press apparatus according to claim 1.
  3. At both ends of the workpiece in the width direction, recesses are formed that are indented upward. The regulating portion is a protrusion formed by a projection, The recess of the workpiece is fitted into the protrusion. The progressive press apparatus according to claim 1.
  4. The regulating portion is a wall portion formed by a wall extending in the vertical direction, Through members are inserted through both ends of the aforementioned workpiece. The tip of the through member protruding from the workpiece is positioned on the outside of the wall portion in the width direction of the workpiece. The progressive press apparatus according to claim 1.

Description

This disclosure relates to a progressive die press. In progressive die presses that punch out sheet-like workpieces in multiple steps, vertical vibrations occur in the workpieces as the workpieces become thinner and the transport speed increases. Patent Document 1 discloses a progressive press device having guide sections extending along the transport direction on both sides in the workpiece width direction to restrict movement in the workpiece width direction, and a retaining section protruding inward from the guide section in the workpiece width direction, wherein the retaining section suppresses vertical vibration of the workpiece. Japanese Patent Publication No. 2023-16321 This is a schematic diagram of the progressive press apparatus according to Embodiment 1.This is a cross-sectional view of the second lower type, as seen from direction II, along the dashed-dotted line in Figure 1.This is a cross-sectional view of the second lower type, as seen from direction II, along the dashed-dotted line in Figure 1, showing the state in which the movable stripper is lowered.Figure 1 is a schematic top view of the second lower die of a progressive press machine.This is a cross-sectional view of the second lower die of a progressive press apparatus according to Embodiment 2, corresponding to Figure 3.This is a cross-sectional view of the second lower die, corresponding to Figure 3, of a progressive press apparatus according to Embodiment 3. The embodiments of this disclosure will be described below with reference to Figures 1 to 6. Figure 1 is a schematic configuration diagram of the progressive press apparatus of Embodiment 1. Figure 2 is a cross-sectional view of the second lower die as seen from direction II along the dashed-dotted line in Figure 1. Figure 3 is a cross-sectional view of the second lower die as seen from direction II along the dashed-dotted line in Figure 1, showing the state in which the movable stripper has been lowered. Figure 4 is a schematic top view of the second lower die of the progressive press apparatus of Figure 1. Figure 5 is a cross-sectional view of the second lower die of the progressive press apparatus of Embodiment 2, corresponding to Figure 3. Figure 6 is a cross-sectional view of the second lower die of the progressive press apparatus of Embodiment 3, corresponding to Figure 3. It should be noted that the right-handed XYZ Cartesian coordinate system shown in Figures 1-6 is merely a convenient representation for explaining the positional relationships of the constituent elements. In Figures 1-6, the positive Z-axis direction is vertically upward, and the XY plane is the horizontal plane. Embodiment 1 A progressive press apparatus 1 according to Embodiment 1 will be described using Figures 1 to 4. The progressive press apparatus 1 is a device that forms motor core members, which will become motor cores for motors, from a sheet-shaped workpiece W. As shown in Figure 1, the progressive press apparatus 1 has a supply unit 2, a first transport unit 3, a first die 10, a second transport unit 4, a second die 20, and a third transport unit 5. In the progressive press apparatus 1, the workpiece W is transported in the positive X-axis direction in Figure 1. The supply unit 2 has a sheet-like workpiece W, made of electrical steel, wound into a coil. When the supply unit 2 rotates in the direction of the arrow, the workpiece W is supplied. The first conveying unit 3 is composed of a pair of rolls. When the pair of rolls rotate in the direction of the arrow, the first conveying unit 3 grips the workpiece W and conveys it to the first mold 10. The first mold 10 has a first lower mold 11 and a first upper mold 15. The first lower mold 11 is located below the workpiece W being transported from the first transport unit 3 and supports the workpiece W from below. The first upper mold 15 is located above the workpiece W and presses the workpiece W by moving up and down. The first lower mold 11 includes a die holder 12, a die 13, and a lifter 14. The die holder 12 is fixed to the floor surface and supports the die 13 and the lifter 14. The die 13 is mounted on the upper surface of the die holder 12 and supports the workpiece W from below when it is being press-formed. The lifter 14 is fitted into a recess (not shown) located on the upper part of the die 13. A spring is positioned below the lifter 14, and the elastic force of the spring positions the upper part of the lifter 14 above the upper surface of the die 13. Simultaneously, the lifter 14 lifts the workpiece W upward, supporting it while isolating it from the die 13. When the plate holder 17 (described later) descends, the workpiece W is pressed against the die 13, and the entire lifter 14 fits into the recess. The first upper die 15 includes a punch holder 16, a plate holder 17, a cutter 18, and a punch 19. The punch holder 16 moves up and down (in the Z-axis direction in Figure 1) by a drive device (not shown). The plate holder 17 is suspend