JP7131895B2 - PRESSING DEVICE AND PRESSING METHOD - Google Patents

Description

The present invention relates to a press working apparatus and a press working method.

2. Description of the Related Art Conventionally, a press working apparatus and a press working method for obtaining a molded product of a desired shape by sandwiching and shearing a workpiece with a mold having an upper mold and a lower mold are known. For example, in Patent Document 1 below, in a die hole in which a mold is arranged, press shearing is performed in which a workpiece is sandwiched between a punch provided on an upper die and a pad provided on a lower die and pressurized and sheared. A processing method is disclosed.

JP-A-7-80565

However, the press shearing method described in Patent Literature 1 cited above has a problem that the die hole may be clogged with the sheared portion of the sheared workpiece. Therefore, it has been desired to realize a press working apparatus and a press working method capable of appropriately removing the sheared portion of the sheared workpiece.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and its object is to be able to appropriately shear a workpiece and to easily remove the sheared portion of the sheared workpiece. To provide a press working apparatus and a press working method capable of

The present invention will be described below. In order to facilitate understanding of the present invention, the reference numbers of the attached drawings are added in parentheses, but the present invention is not limited to the illustrated forms.

A press machine (100) according to the present invention clamps and shears a workpiece (W) between a mold having an upper mold (10) and a lower mold (20) to produce a molded product of a desired shape. At least one of the upper blade (11) provided in the upper die (10) and the seat (21) provided in the lower die (20) has a curved shape, and the lower die ( 20) includes a lifting seat (21) that can be raised and lowered, and a holder (31) that supports the lifting seat (21). Further, the lifting seat (21) is arranged with a gap below the workpiece (W) .

The press working method according to the present invention obtains a molded product of a desired shape by clamping and shearing a workpiece (W) between a mold having an upper mold (10) and a lower mold (20). At least one of the upper blade (11) provided in the upper die (10) and the seat (21) provided in the lower die (20) is formed to have a curved shape, and the lower die ( 20) includes a lifting seat (21) that can be raised and lowered, and a holder (31) that supports the lifting seat (21). Further, the elevating seat (21) is arranged below the workpiece (W) with a gap therebetween, and the upper blade (11) descends so that the upper blade (11) and the receiving seat (21) cooperate to clamp the workpiece (W), and while the upper blade (11) and the receiving seat (21) clamp the workpiece (W), It is characterized by obtaining a molded product of a desired shape by further descending and shearing the workpiece (W).

ADVANTAGE OF THE INVENTION According to this invention, while being able to shear a workpiece appropriately, the press-working apparatus and press-working method which can remove the sheared part of the sheared workpiece easily can be provided.

It is a longitudinal section showing an example of composition of a press processing device concerning this embodiment. FIG. 2 is a vertical cross-sectional view showing a state in which the press working device according to the present embodiment pinches and shears the workpiece. FIG. 4 is a vertical cross-sectional view showing a state in which the press working device according to the present embodiment descends while sandwiching a sheared work material. FIG. 2 is a vertical cross-sectional view showing a state in which the press working apparatus according to the present embodiment has returned to the initial state shown in FIG. 1 after shearing the workpiece;

Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. In addition, the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the solution of the invention. .

First, a configuration example of a press working apparatus 100 according to this embodiment will be described with reference to FIG. Here, FIG. 1 is a longitudinal sectional view showing a configuration example of the press working apparatus according to this embodiment.

As shown in FIG. 1, a press working apparatus 100 according to this embodiment includes a die having an upper die 10 and a lower die 20 for shearing a workpiece W. As shown in FIG. In the present embodiment, the portion (shearing portion S) of the workpiece W painted in black is sandwiched between dies and sheared.

The upper die 10 has an upper blade 11 having a curved shape. The upper blade 11 according to this embodiment is formed so that the cutting edge is tapered like a bowl. Since the upper blade 11 has a curved shape, the press working apparatus 100 according to the present embodiment can appropriately shear the workpiece W and improve the breaking efficiency. .

The lower die 20 includes a lifting seat 21 that can be raised and lowered, and a holder 31 that supports the lifting seat 21 .

The lifting seat 21 is formed in a substantially cylindrical shape, and is arranged with a gap downward from the position of the sheared portion S of the workpiece W. As shown in FIG. In this embodiment, the upper surface 21a of the lifting seat 21 that receives the upper blade 11 of the upper die 10 is formed to have a mid-high shape corresponding to the shape of the upper blade 11 that is narrowed. However, the upper blade 11 and the upper surface 21a of the lifting seat 21 only need to have corresponding shapes so that they can clamp the workpiece, and the upper blade 11 has a mid-high shape. In addition, the upper surface 21 a of the lifting seat 21 that receives the upper blade 11 may be formed to be narrowed corresponding to the shape of the upper blade 11 . As described above, the upper blade 11 and the upper surface 21a of the lifting seat 21 have corresponding curved surface shapes, so that the sheared portion S of the workpiece W is curved and reduced in diameter, and the sheared portion S is transferred to the apparatus. It can prevent clogging inside.

The lifting seat 21 has a holder fitting hole 23 fitted to the outer periphery of the holder 31, a bolt insertion hole 25 for inserting the bolt 26, and an elastic body holding groove 27 for holding an elastic body 40, which will be described later. ,

The holder fitting hole 23 is formed in the central lower portion of the lift seat 21 . The holder fitting hole 23 is fitted to the outer periphery of the lifting seat fitting portion 33 of the holder 31, which will be described later, so that, for example, fragments of the sheared portion S and dust can be prevented from entering the inside of the lower die 20. is now possible.

A bolt insertion hole 25 is formed in the center of the lift seat 21 . The bolt insertion hole 25 is formed with a stepped portion 25a for locking the head of the bolt 26. As shown in FIG. When the stepped portion 25a abuts on the head portion of the bolt 26, the lift seat 21 is arranged below the position of the sheared portion S of the workpiece W with a predetermined gap therebetween.

The elastic body holding groove 27 is formed on the upper surface of the holder fitting hole 23 so that the elastic force of the elastic body 40 can be received by the elastic body holding groove 27 .

The holder 31 includes a lift seat fitting portion 33 fitted to the inner periphery of the holder fitting hole 23 of the lift seat 21, a large cylindrical portion 35 having a diameter larger than that of the lift seat fitting portion 33, It comprises a bolt hole 37 formed in the large cylindrical portion 35 , an elastic body holding hole 39 for holding the elastic body 40 , and a bolt hole 41 for inserting the bolt 26 .

The holder 31 is fixed to the base 20 a by inserting bolts 38 into bolt holes 37 formed in the large cylindrical portion 35 . In this embodiment, the holder 31 is fixed to the base 20a by inserting two bolts 38, 38 into the bolt holes 37, 37. As shown in FIG.

An elastic body holding hole 39 is formed in the upper central portion of the holder 31 . An elastic body 40 is installed in the elastic body holding hole 39 . The elastic force of the elastic body 40 always acts on the elastic body holding groove 27, and unless the lift seat 21 receives an external force, the lift seat 21 moves downward from the position of the sheared portion S of the workpiece W. They are arranged with a predetermined gap.

A bolt hole 41 into which a bolt 26 is inserted to determine the distance between the lifting seat 21 and the position of the sheared portion S of the workpiece W is formed under the elastic body holding hole 39 .

The configuration example of the press working apparatus 100 according to the present embodiment has been described above. Next, an operation example of the press working apparatus 100 according to the present embodiment will be described with reference to FIGS. 2 to 4. FIG. Here, FIG. 2 is a vertical cross-sectional view showing a state in which the press working device according to the present embodiment sandwiches and shears the work material. FIG. 3 is a vertical cross-sectional view showing a state in which the press working device according to the present embodiment descends while sandwiching the sheared work material. Furthermore, FIG. 4 is a vertical cross-sectional view showing the initial state shown in FIG. 1 after the press working apparatus according to the present embodiment shears the workpiece.

As shown in FIG. 1, in the initial state of the press working apparatus 100, the upper blade 11 of the upper die 10 is arranged above the workpiece W, and the lift seat 21 is positioned at the sheared portion S of the workpiece W. is arranged with a gap below.

From the initial state shown in FIG. 1, the upper mold 10 having the upper blade 11 is lowered, and the upper blade 11 and the upper surface 21a of the lifting seat 21 cooperate to clamp the sheared portion S of the workpiece W. It shears and becomes the state shown in FIG. More specifically, when the upper die 10 descends and the upper blade 11 presses the workpiece W, the sheared portion S of the workpiece W is curved corresponding to the curved surface shape of the upper blade 11, and the upper blade 11 and the upper surface 21a of the lift seat 21, and are sheared. With such a configuration, according to the present embodiment, it is possible to appropriately shear the workpiece W and improve the breaking efficiency. Further, according to the present embodiment, the sheared portion S of the workpiece W is curved and reduced in diameter, and the sheared portion S can be prevented from clogging the inside of the apparatus.

Then, as shown in FIG. 3, the upper blade 11 and the upper surface 21a of the lifting seat 21 are further lowered while holding the sheared portion S between them. More specifically, the upper mold 10 having the upper blade 11 is lowered, and the elastic force of the elastic body 40 which is installed in the elastic body holding hole 39 of the holder 31 and contacts the elastic body holding groove 27 of the lift seat 21 is released. By pressing the lower die 20 with a greater pressing force, the lifting seat 21 is also lowered.

Furthermore, in the press working apparatus 100 according to the present embodiment, the upper mold 10 having the upper blade 11 and the lifting seat 21 which are lowered while sandwiching the sheared portion S are raised and returned to the initial state, as shown in FIG. state shown. More specifically, when the upper die 10 rises, the pressing force of the upper blade 11 against the lifting seat 21 is released and external force exceeding the elastic force of the elastic body 40 is no longer applied. It will rise with force. At this time, since the sheared portion S is placed on the upper surface 21a of the lift seat 21, the machining process of the press working apparatus 100 according to the present embodiment is completed by removing the sheared portion S. Then, a molded article having a desired shape can be obtained. At this time, as described above, the lifting seat 21 is arranged with a gap below the position of the sheared portion S of the workpiece W, so that the sheared portion S that is punched out is the original portion of the workpiece W. The sheared portion S can be reliably removed without returning to the position.

As a method for removing the sheared portion S remaining on the upper surface 21a of the lift seat 21, for example, after the workpiece W is moved from the lower mold 20, the entire lower mold 20 is tilted to remove the sheared portion S. can be removed by dropping the sheared portion S downward.

The operation example of the press working apparatus 100 according to the present embodiment has been described above. By having the above configuration, the press working apparatus 100 according to the present embodiment can appropriately shear the workpiece W and easily remove the sheared portion S of the sheared workpiece W. It is possible.

Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be added to the above embodiments. It is clear from the description of the scope of the claims that forms with such modifications or improvements can also be included in the technical scope of the present invention. For example, in the above-described embodiment, both the upper blade 11 and the upper surface 21a of the lifting seat 21 are curved, but only one of them may be curved. In this case, it is preferable that the curved surface shape is tapered like the above-described bowl so that the outer peripheral portion of the shearing portion S can be reliably sheared.

REFERENCE SIGNS LIST 100 press working device 10 upper die 11 upper blade 20 lower die 20a base 21 elevating seat 23 holder fitting hole 25 bolt insertion hole 25a stepped portion 26 bolt 27 elastic body holding groove 31 Holder 33 Lifting seat fitting portion 35 Large cylindrical portion 37 Bolt hole 38 Bolt 39 Elastic body holding hole 40 Elastic body 41 Bolt hole W Work material S Shearing portion.

Claims (2)

A press working device for obtaining a molded product of a desired shape by sandwiching a workpiece with a mold having an upper mold and a lower mold and shearing a sheared portion to be removed , wherein the upper blade provided in the upper mold and the At least one of the seats included in the lower mold has a curved surface shape, and the lower mold includes a liftable seat that can be raised and lowered, and a holder that supports the lift seat. is fitted to the outer periphery of the holder, and the lift seat can be moved up and down with respect to the holder via an elastic body. A press working device that is arranged with a gap below a workpiece. A press working method for obtaining a molded product of a desired shape by sandwiching a workpiece with a mold having an upper mold and a lower mold and shearing a sheared portion to be removed , wherein the upper blade provided in the upper mold and the At least one of the seats included in the lower mold is formed to have a curved shape, and the lower mold includes a lifting seat that can be raised and lowered, and a holder that supports the lifting seat, The lifting seat is fitted to the outer periphery of the holder, and the lifting seat can be raised and lowered with respect to the holder via an elastic body, and contacts a bolt provided on the holder. , the upper blade is lowered and the upper blade and the elevating seat cooperate to clamp the workpiece, and the upper blade and A press working method characterized by obtaining a molded product of a desired shape by further lowering the lifting seat while clamping the work material and shearing the work material.

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