JPH06304798A - Press machine - Google Patents

Abstract

PURPOSE:To reduce noises when press are performed with a simple means by providing an upper die side and a lower die side soundproof members respectively, possible to engage with each other, on the outer periphery sides of the upper and the lower dies. CONSTITUTION:An upper die 1 which is freely ascendable and descendably, and a lower die 2 which is arranged opposite to the upper die 1, are arranged on a press. An upper die side and a lower die side soundproof members 5 and 6 are provided respectively, possible to engage with each other at the time of lowering the upper die 1, surrounding the upper die 1 and the lower die 2 on the outer periphery sides of them. An air tube 12 guiding compressed air generating between both parties at the time of the engagement of both soundproof members 5 and 6 as air for ejecting scraps in the following process, is provided. Consequently, the propagation of noises generating with pressing to the outside, is cut off by the soundproof members 5 and 6, and it can improve workers' working environments and prevent damage by noise to the neighborhood.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press working apparatus, and more particularly to a soundproof structure in the press working apparatus.

[0002]

2. Description of the Related Art When processing an iron plate or the like into a desired shape, a press working apparatus is used which comprises a vertically movable upper die and a lower die opposed to the upper die. For example, extremely loud noise (for example, about 10
0 dB) occurs, and there is a problem that it has a great influence on workers and residents of the housing around the factory. In addition, the actual development 61-9
Japanese Patent No. 2421 discloses a trimming press die, but the trimming press die also has the same problem as described above.

[0003]

However, no special measures have been taken as measures against the above-mentioned noises, and only a factory has been installed in a place away from the residential area. Therefore, the worker must work in a bad environment exposed to noise, which is a cause of occupational diseases such as deafness, and it is an urgent task to improve the working environment by reducing the noise. Has become.

The present invention has been made in view of the above points, and effectively suppresses noise caused by press working by a soundproof member that surrounds the outer peripheral sides of the upper mold and the lower mold and can be fitted to each other. The first purpose is to reduce the amount, and the second purpose is to allow the compressed air generated between the soundproof members during press working to be used for discharging scrap in the next step.

[0005]

According to a first aspect of the present invention, as a means for solving the above-mentioned problems, a press working apparatus is provided with an upper mold that can be raised and lowered and a lower mold that is arranged to face the upper mold. On the outer peripheral sides of the upper mold and the lower mold, upper and lower mold-side lower soundproofing members that surround the upper mold and the lower mold and can be fitted to each other when the upper mold is lowered are provided.

According to a second aspect of the present invention, as a means for solving the above-mentioned problems, in the press working apparatus according to the first aspect, when the upper die side and lower die side soundproof members are fitted to each other, they occur. An air pipe that guides the compressed air as scrap discharge air in the next process is attached.

[0007]

According to the first aspect of the invention, the following actions can be obtained by the above means.

That is, when the upper die is lowered during the press working, the soundproofing members surrounding the outer rims of the upper die and the lower die are fitted to each other, which is accompanied by the press working. The sound transmission member blocks the outward propagation of the generated noise.

According to the second aspect of the invention, the following effects can be obtained by the above means.

That is, compressed air is generated inside by the fitting of the upper mold side and lower mold side soundproof members during the press working. The compressed air is supplied to the next step through the air pipe and used as scrap discharge air. Will be used.

[0011]

According to the first aspect of the present invention, in a press working apparatus including an upper mold that can be raised and lowered and a lower mold that is arranged to face the upper mold, the outer peripheral side of the upper mold and the lower mold, The upper and lower mold lower soundproof members that surround each other and can be fitted to each other when the upper mold is lowered are provided respectively so that the soundproof member blocks the outward propagation of noise generated during press working. Therefore, the noise during press working can be reduced by an extremely simple means, and there is an excellent effect that it greatly contributes to the improvement of the working environment of the worker and the prevention of noise damage to the neighborhood.

According to the second aspect of the present invention, in the press working apparatus according to the first aspect, compressed air generated between the upper die side and the lower die side soundproofing members when they are fitted to each other is compressed air for scrap discharge in the next step. Since an air pipe is installed as a guide, compressed air that is derived from press work can be used as scrap discharge air in the next process, ensuring noise reduction during press work and ensuring the discharge of scrap in the next process. It has an excellent effect that it can be done.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the press working apparatus of this embodiment has an upper die 1 fixed to the lower surface of a press slide 3 which can be raised and lowered by an appropriate raising and lowering means (not shown), and the upper die. 1 and the lower die 2 fixed to the bolster 4 are arranged to face each other, and by pressing the upper die 1 onto the lower die 2 by the downward movement of the press slide 3,
Pressing is performed to form a member interposed between the two into a desired shape. During the press working, extremely loud noise was generated, and the working environment deteriorated,
Although noise damage to the neighborhood has become a problem, in this embodiment, the following noise prevention measures are taken.

The press slide 3 and the bolster 4 surround the outer peripheral sides of the upper mold 1 and the lower mold 2, respectively, and when the press slide 3 descends (that is, when the upper mold 1 descends).
Upper mold side and lower mold side lower soundproofing members 5 and 6 which can be fitted to each other are fixed by fixtures 7 and 7, respectively (see FIGS. 3 and 4).

The soundproof members 5 and 6 are rectangular cylindrical main bodies 5a and 6a surrounding the outer peripheral sides of the upper mold 1 and the lower mold 2, respectively.
And flange portions 5b and 6b fixed to the press slide 3 and the bolster 4, respectively. The flange portions 5b and 6b are fixed to the press slide 3 and the bolster 4 by fixing means 7, 7 ... It is supposed to be done. In the case of this embodiment, the upper mold side soundproof member 5 is adapted to be fitted to the outer side of the lower mold side soundproof member 6, but conversely, the lower mold side soundproof member 6 is fitted to the upper mold side soundproof member. It goes without saying that it may be fitted to the outside of the member 5. Reference numeral 8 is a reinforcing rib on the outer peripheral side of the soundproofing members 5 and 6 for reinforcing the force in the expansion direction.

In the case of this embodiment, the soundproof members 5 and 6 are
As shown in FIG. 2, vibration-damping steel plates 10 and 10 are laminated on both surfaces of the polystyrene foam 9, and have a very high soundproofing effect. As the soundproof members 5 and 6, it is of course possible to omit the damping steel plate and use only styrofoam, or to use other members that are expected to have a soundproof effect.

Further, the lower mold side soundproof member 6 is provided with an exhaust port 11 for letting out compressed air generated between the upper mold side and the lower mold side soundproof members 5, 6 when they are fitted to each other. However, an air pipe 12 that guides the compressed air as scrap discharge air in the next step is connected to the exhaust port 11.

In the case of this embodiment, the next step following the press working step is a trimming step provided with a trimming device 13 (see FIG. 6) for removing unnecessary portions from the press-formed product. The trimming device 13 has a shooter 1 for discharging the scrap S separated from the press-formed product.
4 is attached, and the tip of the air pipe 12 is exposed to the upper end side of the shooter 14.

As shown in FIG. 5, the air pipe 12 comprises a large diameter portion 12a connected to the exhaust port 11 side and a small diameter portion 12b facing the upper end side of the shooter 14, The compressed air flowing from the large diameter portion 12a to the small diameter portion 12b is further pressurized by reducing the diameter of the flow path.

With the press working apparatus constructed as described above, the following operational effects can be obtained.

The press working is performed by lowering the press slide 3 to press the upper die 1 and the lower die 2 into contact with each other. At this time, as the press slide 3 is lowered, the upper die side soundproof member is pressed. 5 and the lower mold side soundproof member 6 are fitted to each other, and the outer peripheral sides of the upper mold 1 and the lower mold 2 are substantially sealed spaces surrounded by the soundproof members 5 and 6.
Therefore, the noise generated during the press working is reflected and attenuated by the inner surfaces of the soundproof members 5 and 6, as shown by the chain double-dashed line in FIG. 1, and is prevented from propagating outward. This makes it possible to significantly reduce noise in the work environment.

Further, the soundproof member 5,
The compressed air generated in the space surrounded by 6 is guided to the upper end side of the shooter 14 in the trimming device 13 of the next process via the air pipe 12 and is used as scrap discharge air for promoting discharge of the scrap S.

The invention of the present application is not limited to the configuration of the above-described embodiment, and it goes without saying that the design can be appropriately changed without departing from the gist of the invention.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a press working apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a soundproof member in the press working apparatus according to the embodiment of the present invention.

FIG. 3 is a bottom view of the upper mold side soundproof member in the press working apparatus according to the embodiment of the present invention.

FIG. 4 is a plan view of a lower mold side soundproof member in the press working apparatus according to the embodiment of the present invention.

FIG. 5 is an enlarged view of an air pipe in the press working apparatus according to the embodiment of the present invention.

FIG. 6 is a side view of an essential part of a trimming device used in a trimming process which is a process subsequent to the press working.

[Explanation of symbols]

1 is an upper mold, 2 is a lower mold, 3 is a press slide, 4 is a bolster, 5 is an upper mold side soundproof member, 6 is a lower mold side soundproof member, 11 is an exhaust port, 12 is an air pipe, 13 is a trimming device, 1
4 is shooter, S is scrap.

Claims (2)

[Claims] 1. A press working apparatus comprising a vertically movable upper die and a lower die opposed to the upper die, the outer die of the upper die and the lower die surrounding and surrounding each of the upper die and the lower die. A press working apparatus comprising: an upper mold side and a lower mold side lower soundproofing member which can be fitted to each other when the mold is lowered. 2. An air pipe is provided for guiding compressed air generated between the upper mold side and the lower mold side soundproof members when they are fitted to each other as scrap discharge air in the next step. 1. The press working apparatus according to 1.