JP7794675B2 - Cutter device - Google Patents

Description

The present invention relates to a cutting device.

Conventionally, devices have been provided that cut the edges of press-formed workpieces and separate the resulting scrap into small pieces, such as the scrap cutter device described in Patent Document 1 below. The scrap cutter in Patent Document 1 eliminates the step where the trim blade of the upper die bites into the lower scrap cutter, and partially eliminates the step where the upper scrap cutter bites into the lower scrap cutter on the bottom dead center side, and is equipped with a cutting aid such as a convex portion that forcibly pulls and cuts the scrap in this eliminated portion.

Japanese Patent Application Laid-Open No. 2003-88923

Here, with conventional scrap cutters, including the one disclosed in Patent Document 1 mentioned above, when the upper die cutting blade is lowered relative to the fixed lower die cutting blade to cut the workpiece, and then the upper die cutting blade is raised, the edge of the cut scrap can get caught on the upper die cutting blade, causing the scrap to be lifted upward. If the scrap is lifted in this way, there is a risk that the scrap may get into the equipment or mold, causing the production line to stop or the mold to be damaged.

The present invention aims to provide a cutter device that can prevent the edge of the cut workpiece from getting caught on the cutting blade after the workpiece has been cut.

(1) The cutter device of the present invention, which is provided to solve the above-mentioned problems, comprises cutting blades A and B that are arranged to be movable relative to each other in a first direction, and a pressing portion that applies a pressing force to a workpiece disposed between cutting blades A and B in the first direction. The cutting blades A and B are capable of cutting the workpiece by moving relatively in the first direction at a position separated by a predetermined clearance in a second direction that intersects the first direction. At least one of cutting blades A and B has a contact portion that contacts the workpiece, and a retraction portion that is formed to retract away from the contact portion in a direction away from the workpiece at a position further away from the contact portion in the second direction from the position where the clearance is formed when the workpiece is in contact with the contact portion, and the pressing portion is capable of pressing the workpiece toward the pressing portion.

The cutter device of the present invention can shear and cut a workpiece at a position where a clearance is formed between cutting blades A and B by moving cutting blades A and B toward and away from each other in a first direction. In the cutter device of the present invention, at least one of cutting blades A and B has a contact portion that contacts the workpiece to be cut, as well as a retraction portion that retracts away from the workpiece from the contact portion. The retraction portion is located in a position offset in a second direction from the position where the clearance is formed between cutting blades A and B when the workpiece is cut. By pressing the workpiece toward the retraction portion with the pressing portion, the cutter device of the present invention can bend the end of the workpiece cut at the clearance formation position in a direction away from the cutting blade A or B with the retraction portion formed in the second direction. This allows the cutter device of the present invention to prevent the end of the cut workpiece from getting caught on the cutting blade after cutting. Furthermore, the cutter device of the present invention prevents cut workpieces from entering unexpected locations inside the device, preventing production line stoppages and damage to various parts of the device.

(2) The cutter device of the present invention described above may be characterized in that the pressing unit presses the workpiece after the timing at which the cutting blades A and B cut the workpiece and before the timing at which the cutting blades A and B start to move in the direction away from each other.

By configuring the cutter device of the present invention in this way, after the workpiece is bent by pressing with the pressing portion, cutting blades A and B can be moved relatively so as to move away from each other in the first direction. This allows the cutter device of the present invention to more reliably prevent the edge of the cut workpiece from getting caught on the cutting blade after the workpiece has been cut.

The above-mentioned pressing unit can be operated by a cylinder or the like provided separately from cutting blade A and cutting blade B. In this case, however, a separate mechanism or device for operating the pressing unit must be provided, and control must be provided to operate the pressing unit at the appropriate timing in conjunction with the operation of cutting blade A and cutting blade B. In order to simplify the device configuration and operational control of the cutter device of the present invention, it is preferable that the cutter device of the present invention does not require a separate mechanism or device for operating the operating unit, or that the operating unit be separately controlled.

(3) Based on this knowledge, the cutter device of the present invention described above may be characterized in that the retracted portion is provided on one of the cutting blades A and B, and a pressing piece forming the pressing portion is integrally provided on the other, and the pressing piece is pushed into the retracted portion when the cutting blades A and B move relative to each other in a direction approaching each other.

As described above, the cutter device of the present invention is configured such that a pressing piece forming a pressing portion is integrally provided on the other of cutting blades A and B, corresponding to the retraction portion provided on one of cutting blades A and B. This allows the cutter device of the present invention to operate the pressing portion at the appropriate timing in conjunction with the operation of cutting blades A and B, without the need for a separate mechanism or device for operating the pressing portion or for special control. This simplifies the device configuration and operational control of the cutter device of the present invention.

Here, it is desirable that the cutter device of the present invention described above be configured to be able to bend the workpiece along the cutting position (cutting line) of the workpiece in order to prevent the edge of the cut workpiece from getting caught on the cutting blade after the workpiece has been cut.

(4) Based on this knowledge, the cutter device of the present invention described above may be characterized in that the retraction portion and the pressing piece are arranged to extend along the cutting position of the workpiece.

By configuring the cutter device of the present invention in this way, it is possible to bend the workpiece along the cutting position (cutting line) of the workpiece. As a result, the cutter device of the present invention can more reliably prevent the edge of the cut workpiece from getting caught on the cutting blade after the workpiece has been cut.

Here, in a configuration in which a pressing force is applied to the workpiece by a pressing piece that forms the pressing portion as described above, if the contact area of the pressing piece is large, the pressing force applied to the workpiece will be dispersed. Therefore, in order to efficiently apply the pressing force required to bend the workpiece at the contact point of the pressing piece, it is advisable to minimize the contact area of the pressing piece. On the other hand, in order to bend the workpiece along the cutting line of the workpiece, it is desirable for the pressing piece to be arranged so that it extends in the direction along the cutting line of the workpiece.

(5) Based on this knowledge, in the cutter device of the present invention described above, the pressing piece has a plate-like portion whose thickness is smaller than its length in the vertical and horizontal directions, and the side surface of the plate-like portion formed in the thickness direction forms a pressing surface that is pressed against the workpiece, and the pressing surface is arranged so as to extend in a direction along the cutting line of the workpiece formed at the position where the clearance is formed.

The cutter device of the present invention has a plate-shaped portion that forms a pressing piece, and the side surface of the plate-shaped portion that is formed in the thickness direction serves as a pressing surface that presses against the workpiece. As a result, when the pressing piece presses the workpiece, the cutter device of the present invention minimizes the contact area of the pressing piece with the workpiece, preventing the pressing force applied to the workpiece from being dispersed. As a result, the cutter device of the present invention can efficiently apply the pressing force required to bend the workpiece at the contact point of the pressing piece. Furthermore, the cutter device of the present invention is arranged so that the side surface that forms the pressing surface of the pressing piece extends in a direction along the cutting line of the workpiece formed at the position where the clearance is formed. This allows the cutter device of the present invention to bend the workpiece along the cutting line. Therefore, the cutter device of the present invention can reliably bend the workpiece along the cutting line without applying excessive external force to the pressing piece.

When a pressing piece such as that described above is provided, a large force acts on the pressing piece in the first direction. Therefore, it is preferable that the pressing piece be configured so as not to hinder the cutting or bending of the workpiece, while also being strong enough to withstand the force acting in the first direction.

(6) Based on this knowledge, the cutter device of the present invention described above may be characterized in that a rib having a portion extending in the first direction is provided on one of the side surfaces constituting the plate-shaped portion, the side surface facing the opposite side to the side surface facing the clearance.

The cutter device of the present invention is configured in this way, so the rib reinforces the pressing piece, allowing the pressing piece to exert sufficient strength against the action of force in the first direction. Furthermore, the cutter device of the present invention is configured such that the rib is provided on the side of the plate-shaped portion facing opposite the side facing the clearance. This allows the cutter device of the present invention to reinforce the pressing piece with the rib while maintaining a configuration that does not impede cutting or bending of the workpiece.

Here, in order to form a bend in the workpiece large enough to prevent the workpiece from getting caught on the cutting blade at a position offset in the second direction from the cutting position (cutting line) of the workpiece as described above, it is advisable to bend the workpiece at a position that is some distance in the second direction from the position where the clearance is formed.

(7) Based on this knowledge, the cutter device of the present invention described above may be characterized in that the retracted portion is formed at a position that is deviated from the position where the clearance is formed in the second direction by a distance greater than the clearance.

By configuring the cutter device of the present invention in this way, it is possible to form a bent portion in the workpiece that is large enough to prevent the workpiece from getting caught on the cutting blade at a position that is offset in the second direction from the cutting position (cutting line) of the workpiece.

The cutter device described above may be a standalone device, but it may also be part of another device such as a press device, or attached to another device such as a press device.

(8) The press device of the present invention, provided based on this knowledge, has dies a and b that are relatively movable toward and away from each other in a first direction, and is capable of cutting a plate-shaped material along a predetermined trimming line by press molding using dies a and b. It is characterized in that it is equipped with a cutter device described in any one of claims 1 to 7, and that the cutter device cuts scrap material generated by cutting the material into workpieces.

Because the press device of the present invention is configured in this way, scrap material generated during press molding can be cut using the cutter device described above. This prevents broken scrap material from getting into unexpected locations, such as inside mold a or mold b that make up the press device or the cutter device, and prevents production line stoppages and damage to various parts of the device.

(9) The above-mentioned press device may be characterized in that the dies a and b are arranged so as to be relatively movable in a first direction, the cutting blades A and B are arranged on the dies a and b, respectively, and are capable of cutting the workpiece by moving relatively in the first direction at a position separated by a predetermined clearance in a second direction intersecting the first direction in conjunction with the relative movement of the dies a and b in the first direction.

By configuring the press device of the present invention in this way, scrap material can be cut by cutting blades A and B in conjunction with the relative movement of dies a and b in the first direction during press forming. Furthermore, the press device of the present invention does not require a separate drive source or drive mechanism for moving cutting blades A and B relative to each other in the first direction in the cutter device. This further simplifies the configuration of the press device equipped with the cutter device.

The present invention provides a cutter device that can prevent the edge of the cut workpiece from getting caught on the cutting blade after the workpiece has been cut.

1A and 1B are schematic diagrams of a cutter device and a press device according to an embodiment of the present invention, in which FIG. 1A shows a state before cutting a workpiece, and FIG. 1B shows a state during cutting of the workpiece. 1 is a perspective view showing a cutter device according to an embodiment of the present invention; 1 is a perspective view showing an upper die cutting blade constituting a cutter device according to an embodiment of the present invention, viewed obliquely from below. FIG.

A cutter device 10 according to one embodiment of the present invention and a press device 100 equipped with the same will be described in detail below with reference to the drawings. In the following description, unless otherwise specified, the vertical direction in the state shown in FIG. 1 will be referred to as the first direction, and the direction intersecting the first direction (the horizontal direction in the illustrated example) will be referred to as the second direction. Below, the general configuration of the cutter device 10 and press device 100 will be described, followed by a more detailed description of the configuration unique to the cutter device 10.

<General configuration of cutter device 10 and press device 100>
1 and 2, the cutter device 10 includes an upper die cutting blade 20 (cutting blade A) and a scrap cutter 30 (cutting blade B). The cutter device 10 can be configured as a standalone device, or can be used as a device that forms part of another device or is attached to another device. The cutter device 10 illustrated in this embodiment forms part of a press device 100.

Specifically, as shown in FIG. 1 , the press apparatus 100 illustrated in this embodiment has an upper mold 110 (mold a) and a lower mold 120 (mold b) that are movable relative to each other so as to approach and move away from each other in a first direction (the vertical direction in the illustrated example). The press apparatus 100 is capable of cutting a plate-shaped material, such as a metal plate, along a predetermined trimming line by moving the upper mold 110 toward the lower mold 120 and sandwiching the plate-shaped material between the upper mold 110 and the lower mold 120. The press apparatus 100 is equipped with a cutter device 10, which can cut scrap material generated during press molding into workpieces W. The press apparatus 100 can be configured, for example, to have the lower mold 120 move toward and away from the upper mold 110, or to have both the upper mold 110 and the lower mold 120 move relative to each other in the first direction. In this embodiment, the lower mold 120 does not move in the first direction, and the upper mold 110 moves in the first direction toward the lower mold 120.

The upper die cutting blade 20 is a cutting blade provided on the upper die 110. The upper die cutting blade 20 is fixed to the upper die 110 and can move integrally with the upper die 110. Therefore, when the upper die 110 is moved toward the lower die 120 to perform press molding using the press device 100, the upper die cutting blade 20 moves toward the lower die 120 (first direction) in conjunction with the upper die 110. The upper die cutting blade 20 is attached to the upper die 110 in a position where its blade faces the scrap cutter 30 provided on the lower die 120, as described below.

The scrap cutter 30 is a cutting blade provided on the lower mold 120. The scrap cutter 30 is fixed to the lower mold 120. The scrap cutter 30 is attached to the lower mold 120 with its blade facing the upper mold cutting blade 20 provided on the upper mold 110.

The cutter device 10 is equipped with the upper die cutting blade 20 and scrap cutter 30 as described above. As a result, the cutter device 10 is capable of cutting a workpiece W placed between the upper die cutting blade 20 and the scrap cutter 30 by moving the upper die cutting blade 20 and the scrap cutter 30 relative to each other in a second direction (horizontal direction) that intersects the first direction (vertical direction) at a position separated by a predetermined clearance C.

<<Configuration specific to cutter device 10>>
1 to 3, the configuration unique to the cutter device 10 will be described in more detail. The cutter device 10 is configured such that one of the upper die cutting blade 20 (cutting blade A) and the scrap cutter 30 (cutting blade B) is provided with a contact portion 40, and the other is provided with a retraction portion 50. The cutter device 10 also includes a pressing portion 60.

The contact portion 40 may be provided on either the upper die cutting blade 20 (cutting blade A) or the scrap cutter 30 (cutting blade B), but in this embodiment it is provided on the scrap cutter 30. The contact portion 40 is the portion of the scrap cutter 30 that comes into contact with the workpiece W. In this embodiment, the contact portion 40 is provided on the top surface side of the scrap cutter 30. The contact portion 40 comes into contact with the workpiece W when the workpiece W is placed on the scrap cutter 30.

The retraction portion 50 is provided on the same cutting blade of the upper die cutting blade 20 and the scrap cutter 30 as the contact portion 40 described above. In this embodiment, since the contact portion 40 is provided on the scrap cutter 30, the retraction portion 50 is also provided on the scrap cutter 30. The retraction portion 50 is a concave portion formed so as to retract in a direction away from the workpiece W than the contact portion 40, at a position offset from the position where the clearance C is formed in the second direction (horizontal in the illustrated example) from the contact portion 40 when the workpiece W is in contact with the contact portion 40.

The retraction section 50 is provided to extend along the cutting position of the workpiece W. When the retraction section 50 is viewed from the side as shown in Figure 1, the retraction section 50 is formed to extend in a direction intersecting the plane of the paper. The retraction section 50 is formed at a position that is greater than the clearance C formed in the second direction (horizontal direction) between the upper die cutting blade 20 and the scrap cutter 30, i.e., based on the cutting position (cutting line) of the workpiece W. In other words, the retraction section 50 is provided at a position where the distance X from the clearance formation position to the retraction section 50 is sufficiently larger than the width x of the clearance C.

The pressing portion 60 is used to apply a pressing force to the workpiece W positioned between the upper die cutting blade 20 and the scrap cutter 30. The pressing portion 60 is capable of pressing the workpiece W, which is positioned so as to contact the contact portion 40, toward the retraction portion 50. The pressing portion 60 includes a pressing piece 62 and a rib 64.

The pressing piece 62 is a member having a plate-shaped portion 62x that forms a pressing portion. The pressing piece 62 is provided on the upper die cutting blade 20 and the scrap cutter 30, whichever cutting blade is different from the cutting blade on which the contact portion 40 and retraction portion 50 described above are provided. In this embodiment, since the contact portion 40 and retraction portion 50 are provided on the scrap cutter 30, the pressing piece 62 is provided on the upper die cutting blade 20.

The pressing piece 62 is provided at a position corresponding to the retraction portion 50 described above. Specifically, the pressing piece 62 is formed on one of the cutting blades (the scrap cutter 30 in this embodiment) of the upper die cutting blade 20 and the scrap cutter 30 at a position offset in the first direction from the retraction portion 50 provided on the other cutting blade (the upper die cutting blade 20 in this embodiment). Therefore, when the upper die cutting blade 20 and the scrap cutter 30 are moved relative to each other in a direction that brings them closer together during cutting of the workpiece W, the pressing piece 62 is pressed into the retraction portion 50. This allows the pressing piece 60 to bend the workpiece W that has been pressed into the retraction portion 50 together with the pressing piece 62.

The pressing piece 62 has a plate-shaped portion (plate-shaped section) whose thickness is shorter than its length in the vertical and horizontal directions. The pressing piece 62 has a pressing surface 62a formed by side surfaces formed in the thickness direction. The pressing surface 62a is a surface that applies a pressing force to the workpiece W by being pressed against the workpiece W when the workpiece W is cut. The pressing piece 62 is arranged so that the pressing surface 62a extends in a direction along the cutting line (cutting position) of the workpiece W formed at the position where the clearance C is formed. The pressing piece 62 also has a rib 64 on the side surface 62c facing opposite to the side surface 62b facing the clearance C.

Although only one rib 64 may be provided on the side surface 62c, multiple ribs are provided in this embodiment. Specifically, in this embodiment, a first rib 64a and a second rib 64b are provided as the ribs 64. The first rib 64a is a generally "I"-shaped rib formed to extend in a first direction (vertical direction). The second rib 64b is a rib that has a portion extending in the first direction (vertical direction) as well as a portion extending in a direction intersecting the first direction (vertical direction). The second rib 64b is a generally "L"-shaped rib. The first rib 64a and the second rib 64b are arranged at a predetermined interval in the direction of the cutting line of the workpiece W.

Because the cutter device 10 is configured as described above, the upper die cutting blade 20 and the scrap cutter 30 move relative to each other in the first direction (vertical direction) in conjunction with the relative movement of the upper die 110 and the lower die 120 in the first direction (vertical direction). The cutter device 10 can cut the workpiece W by moving the upper die cutting blade 20 and the scrap cutter 30 relative to each other in the first direction (vertical direction) at positions separated in the second direction (horizontal direction) via the clearance C. Furthermore, when the cutter device 10 cuts the workpiece W, the pressing portion 60 (pressing piece 62) provided on the upper die cutting blade 20 is pressed into the retraction portion 50 provided on the scrap cutter 30. As a result, the workpiece W is bent at the clearance C side (cutting line side) with the retraction portion 50 as the boundary, forming a bent portion Wb, and is separated from the side of the upper die cutting blade 20. Therefore, even if the upper die cutting blade 20 moves in the first direction (up and down) so that the upper die cutting blade 20 and the scrap cutter 30 move apart after cutting the workpiece W, the workpiece W does not interfere with the upper die cutting blade 20.

The cutter device 10 and press device 100 described above have the following characteristic configurations (a) to (i). As a result, the cutter device 10 and press device 100 can achieve the characteristic effects described below.

(a) The cutter device 10 of this embodiment has an upper cutting blade 20 and a scrap cutter 30 that are arranged to be movable relative to each other in a first direction, and a pressing unit 60 that applies a pressing force to a workpiece W arranged between the upper cutting blade 20 and the scrap cutter 30 in the first direction. The upper cutting blade 20 and the scrap cutter 30 are capable of cutting the workpiece W by moving relatively in the first direction at a position separated by a predetermined clearance C in a second direction that intersects the first direction. At least one of the upper cutting blade 20 and the scrap cutter 30 has a contact unit 40 that contacts the workpiece W, and a retraction unit 50 that is formed so as to retract in a direction away from the workpiece W than the contact unit 40 at a position further away from the position where the clearance C is formed in the second direction when the workpiece W is in contact with the contact unit 40. The pressing unit 60 is capable of pressing the workpiece W toward the pressing unit 60.

Since the cutter device 10 is configured as described above, by pressing the workpiece W toward the retraction section 50 with the pressing section 60, the end of the workpiece W cut at the position where the clearance C is formed can be bent in a second direction away from the upper cutting blade 20 and the scrap cutter 30, whichever is formed as the retraction section 50. This allows the cutter device 10 to prevent the end of the cut workpiece W from getting caught on the cutting blade after cutting the workpiece W. The cutter device 10 also prevents the cut workpiece W from getting into unexpected locations, such as inside the device, preventing production line stoppages and damage to various parts of the device.

In this embodiment, an example is shown in which the components constituting the cutter device 10 and the press device 100 are arranged with the first direction being the vertical direction and the second direction being the horizontal direction, but the present invention is not limited to this. In other words, the cutter device 10 and the press device 100 may be configured such that the components are arranged with the first direction being a direction different from the vertical direction and the second direction being a direction intersecting the first direction.

In addition, while this embodiment has been described as an example in which the upper die cutting blade 20 is movable in the first direction while the scrap cutter 30 does not move in the first direction, the present invention is not limited to this. For example, the cutter device 10 may be configured so that the upper die cutting blade 20 does not move in the first direction and the scrap cutter 30 moves in the first direction, thereby causing the upper die cutting blade 20 and the scrap cutter 30 to move relative to each other in the first direction, or so that both the upper die cutting blade 20 and the scrap cutter 30 are movable in the first direction.

(b) In the cutter device 10 of this embodiment, the pressing unit 60 presses the workpiece W after the upper cutting blade 20 and the scrap cutter 30 cut the workpiece W and before the upper cutting blade 20 and the scrap cutter 30 start moving in the direction away from each other. As a result, the cutter device 10 can bend the workpiece W by pressing with the pressing unit 60, and then move the upper cutting blade 20 and the scrap cutter 30 relative to each other so that they move away from each other in the first direction. Therefore, the cutter device 10 can reliably prevent the edge of the cut workpiece W from getting caught on the cutting blade after cutting the workpiece W.

(c) In the cutter device 10 of this embodiment, the scrap cutter 30 is provided with a retraction section 50, and the upper cutting blade 20 is integrally provided with a pressing piece 62 forming a pressing section 60. When the upper cutting blade 20 and the scrap cutter 30 move relative to each other in a direction approaching each other, the pressing piece 62 is pushed into the retraction section 50. As a result, the cutter device 10 can operate the pressing section 60 at the appropriate timing in conjunction with the operation of the upper cutting blade 20 and the scrap cutter 30, without the need for a separate mechanism or device for operating the pressing section 60 or for special control. As a result, the cutter device 10 of this embodiment can simplify the device configuration and operation control.

In this embodiment, a configuration has been illustrated in which the scrap cutter 30 is provided with a retraction section 50 and the upper cutting blade 20 is integrally provided with a pressing piece 62 forming the pressing section 60, but the present invention is not limited to this. For example, the cutter device 10 can be configured such that the scrap cutter 30 is integrally provided with a pressing piece 62 forming the pressing section 60, and the upper cutting blade 20 is provided with a retraction section 50. Furthermore, the cutter device 10 can also be configured such that the pressing section 60 is operated by a cylinder or the like provided separately from the upper cutting blade 20 and the scrap cutter 30.

(d) In this embodiment, the cutter device 10 is configured so that the retraction section 50 and the pressing piece 62 extend along the cutting position of the workpiece W. Because the cutter device 10 is configured in this manner, it is possible to bend the workpiece W along the cutting position (cutting line) of the workpiece W. This allows the cutter device 10 to more reliably prevent the edge of the cut workpiece W from getting caught on the cutting blade after the workpiece W has been cut.

In this embodiment, an example has been shown in which the workpiece W can be bent along the cutting position (cutting line) of the workpiece W, but the present invention is not limited to this. For example, if the location where the edge of the cut workpiece W is caught by the cutting blade after cutting is limited to a specific location, a retraction portion 50 and a pressing piece 62 may be provided at that location.

(e) In the cutter device 10 of this embodiment, the pressing piece 62 has a plate-like plate portion 62x whose thickness is shorter than its length in the vertical and horizontal directions, and the side surface of the plate portion 62x formed in the thickness direction forms the pressing surface 62a that is pressed against the workpiece W. Because the cutter device 10 is configured in this manner, when the pressing piece 62 presses the workpiece W, the contact area of the pressing piece 62 with the workpiece W is minimized, preventing the pressing force applied to the workpiece W from being dispersed. Therefore, the cutter device 10 can efficiently apply the pressing force required to bend the workpiece W at the contact portion 40 of the pressing piece 62.

In addition, the cutter device 10 of this embodiment is arranged so that the pressing surface 62a extends in a direction along the cutting line of the workpiece W formed at the position where the clearance C is formed. As a result, the cutter device 10 has the plate-shaped portion 62x arranged so that the side surface forming the pressing surface 62a of the pressing piece 62 extends in a direction along the cutting line of the workpiece W formed at the position where the clearance C is formed. This allows the cutter device 10 to bend the workpiece W along the cutting line of the workpiece W. Therefore, the cutter device 10 can reliably bend the workpiece W along the cutting line without applying excessive external force to the pressing piece 62.

In this embodiment, an example is shown in which the pressing piece 62, which constitutes the pressing portion 60, uses a plate-shaped portion 62x having a pressing surface 62a so that a large pressing force can be applied to the workpiece W by the pressing piece 62. However, the present invention is not limited to this. The pressing surface 62a illustrated in this embodiment is a flat surface, but the pressing surface 62a may also be a curved surface that is curved so as to form a convex shape toward the workpiece W.

(f) The cutter device 10 described above is configured such that a rib 64 having a portion extending in a first direction is provided on the side surface 62c of the plate-shaped portion 62x, which faces opposite the side surface 62b facing the clearance C. Because the cutter device 10 is configured in this manner, the rib 64 reinforces the pressing piece 62, providing the pressing piece 62 with sufficient strength to withstand the action of force in the first direction. Furthermore, the cutter device 10 is configured such that the rib 64 is provided on the side surface 62c of the plate-shaped portion 62x, which faces opposite the side surface 62b facing the clearance C. As a result, the cutter device 10 is configured so as not to hinder cutting or bending of the workpiece W, while allowing the rib 64 to reinforce the pressing piece 62.

In this embodiment, an example has been shown in which the plate-shaped portion 62x is reinforced by providing the ribs 64 as described above, but the present invention is not limited to this. For example, instead of or in addition to providing the ribs 64, the strength of the plate-shaped portion 62x may be increased by increasing the thickness of a portion of the plate-shaped portion 62x in the thickness direction. Furthermore, if the plate-shaped portion 62x can exhibit sufficient strength without being reinforced by providing the ribs 64, etc., it is possible to omit the structure for reinforcing the plate-shaped portion 62x, such as the ribs 64.

(g) In the cutter device 10 described above, the retraction portion 50 is formed at a position that is offset in the second direction from the position where the clearance C is formed by a distance greater than the clearance C. This allows the cutter device 10 to form a bent portion in the workpiece W that is large enough to prevent the workpiece W from getting caught on the cutting blade at a position that is offset in the second direction from the cutting position (cutting line) of the workpiece W.

Note that a cutter device 10 having some or all of the features described above (a) to (g) can be used as a standalone device for cutting a workpiece W, but it may also be used as part of another device such as the press device 100, as described above, or as an attachment to another device such as the press device 100.

(h) The press device 100 of this embodiment has an upper die 110 and a lower die 120 that are relatively movable toward and away from each other in a first direction, and is capable of cutting a plate-shaped material along a predetermined trimming line by press forming using the upper die 110 and the lower die 120. The press device 100 is equipped with a cutter device 10 having the features described in at least one of (a) to (g), and the cutter device 10 cuts scrap material generated by cutting the material into workpiece W. Because the press device 100 is configured in this way, the scrap material generated by press forming can be cut by the cutter device 10 described above. This prevents broken scrap material from entering unexpected locations, such as the upper die 110, lower die 120, or the interior of the cutter device 10, that make up the press device 100, and prevents production line stoppages and damage to various parts of the device.

Note that the press device 100 is merely an example of the above-described cutter device 10 being used as part of another device or as an attachment to another device, and it can also be used in other devices besides the press device 100.

(i) In the press apparatus 100 described above, the upper die 110 and the lower die 120 are arranged so as to be movable relative to each other in a first direction, and the upper die cutting blade 20 and the scrap cutter 30 are arranged on the upper die 110 and the lower die 120, respectively. In conjunction with the relative movement of the upper die 110 and the lower die 120 in the first direction, the upper die cutting blade 20 and the scrap cutter 30 move relatively in the first direction at a position separated by a predetermined clearance C in a second direction intersecting the first direction, thereby enabling the workpiece W to be cut. Because the press apparatus 100 is configured in this manner, scrap material can be cut by the upper die cutting blade 20 and the scrap cutter 30 in conjunction with the relative movement of the upper die 110 and the lower die 120 in the first direction during press forming. Furthermore, the press apparatus 100 does not require a separate drive source or drive mechanism for moving the upper die cutting blade 20 and the scrap cutter 30 relative to each other in the first direction in the cutter device 10. This further simplifies the configuration of the press apparatus 100 equipped with the cutter device 10.

The present invention is not limited to the above-described embodiments and variations, and other embodiments may be possible within the teachings and spirit of the invention without departing from the scope of the claims. The components of the above-described embodiments may be arbitrarily selected and combined. Furthermore, any component of the embodiments may be arbitrarily combined with any component described in the Summary of the Invention or any component embodying any component described in the Summary of the Invention. We intend to obtain rights to these as well through amendments to this application or divisional applications, etc.

The present invention can be suitably used in all cutter devices for cutting workpieces.

10: Cutter device 20: Upper die cutting blade (cutting blade A)
30: Scrap cutter (cutting blade B)
40: Contact portion 50: Retraction portion 60: Pressing portion 62: Pressing piece 62a: Pressing surface 62b: Side surface 62c: Side surface 62x: Plate-shaped portion 64: Rib 100: Pressing device 110: Upper mold (mold a)
120: Lower mold (mold b)
C: Clearance W: Work

Claims (1)

A cutting blade ( A ) and a cutting blade ( B ) that are provided so as to be relatively movable in a first direction;
A pressing unit that applies a pressing force to a workpiece arranged between the cutting blade ( A ) and the cutting blade ( B ) in the first direction;
and
The cutting blade ( A ) and the cutting blade ( B ) are capable of cutting the workpiece by moving relatively in the first direction at positions separated by a predetermined clearance in a second direction intersecting the first direction,
At least one of the cutting edge ( A ) and the cutting edge ( B ) is
a contact portion that comes into contact with the workpiece;
a retracted portion formed so as to retract in a direction away from the contact portion in a state where the workpiece is in contact with the contact portion, at a position deviated from a position where the clearance is formed in the second direction relative to the contact portion;
and
a cutting device for cutting scrap material, characterized in that the pressing portion is positioned at a distance from the contact portion in the second direction and is capable of pushing the workpiece deeper into the retraction portion than the contact portion .