JPH06595U - Press machine - Google Patents

Abstract

(57) [Summary] [Purpose] Noise from the press body is not leaked to the outside. [Structure] The press body (10) is surrounded by a soundproof case (20), and openings (21, 2) of the soundproof case (20) are surrounded.
The sound collector (31) and the sound generator (51) are provided in 2), and the sound receiving data (DR) is received by receiving the signal (Rf) from the sound collector.
F) and sound generation data generation means (40) for generating sound generation data (DDF) having the frequency characteristic opposite to that of the sound reception data (DRF) as input. And the sound data (DDF) as an input, a signal (Df) for reducing or muting the press noise leaking outside from the openings (21, 22) is generated and output to the sound generator (51). This is a configuration provided with a tone generation signal generating means (50).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a press machine having a sound deadening function.

[0002]

[Prior art]

 In a press machine, the press work involves vibration and noise. These vibrations and noises worsen the working environment and are likely to cause pollution in the surrounding area, so countermeasures against them are strongly desired.

As a conventional vibration countermeasure method, for example, as disclosed in JP-A-58-65600, a vibration isolator is provided between the main frame and the pedestal so that the vibration is not transmitted to the surrounding area. Has been devised. On the other hand, as for soundproofing measures, it is general that the entire press machine is hermetically enclosed by a case as disclosed in, for example, Japanese Patent Publication No. 55-1 1440.

[0004]

[Problems to be solved by the device]

 However, although the above-mentioned hermetically-enclosed structure has a soundproof effect, it hinders press work. That is, for example, when the coil material fed from the uncoiler is intermittently supplied to the press machine for progressive processing, openings must be provided on the inlet side and the outlet side of the case. In other words, since the case cannot have a closed structure, noise cannot be prevented from leaking and propagating to the outside through the opening. As described above, there is an effective measure for the vibration generated by the press work, but there is no effective measure for the noise. Therefore, the countermeasure is strongly required.

An object of the present invention is to provide a press machine that does not allow noise generated from the press body to leak or propagate to the outside.

[0006]

[Means for Solving the Problems]

 In the present invention, it is impossible in principle to eliminate the noise generated from the press body, and even if the body case is surrounded by a soundproof case, the soundproof case must be provided with an opening for loading and unloading materials. After admitting that it does not happen, it is configured to cancel the noise generated from the press body and prevent it from leaking and propagating from the opening to the outside.

That is, in the press machine according to the present invention, the press body is surrounded by a soundproof case, and a sound collector and a sound generator are arranged in the opening of the soundproof case, and a signal from the sound collector is received. Sound reception data generation means for generating sound reception data, sound generation data generation means for generating sound generation data having frequency characteristics opposite to the frequency characteristics of the sound reception data, and sound generation data as input from the opening. A sounding signal generating means for generating a signal for reducing or muting the press noise leaking to the outside and outputting the signal to the sounding device is provided.

[0008]

[Action]

 In the present invention having the above structure, the sound collector provided in the opening of the soundproof case collects the noise generated in the press body and leaking and propagating to the outside from the opening. Then, the sound reception data generation means receives the signal from the sound collector, generates sound reception data, and outputs the sound reception data to the sound generation data generation means. Subsequently, the sound generation data generating means generates sound generation data having a frequency characteristic in which the frequency characteristic is inverted based on the input sound reception data, and outputs the sound generation data to the sound generation signal generating means. Here, the sound generator operates based on the input sound signal so as to reduce or mute the press noise that is about to leak to the outside through the opening. Therefore, it is possible to prevent the press noise from leaking and propagating to the outside.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) This first embodiment is shown in FIGS. In FIG. 1, the press machine comprises a press body 10 (crown 11, column 12, slide 13, bolster 14, bed 15) and a soundproof case 20 surrounding the entire press body 10. The soundproof case 20 is provided with openings 21 and 22 for loading and unloading a material (coil material W).

The material intermittent feeding device is composed of an uncoiler 1, a leveler 2 and a feed roll 3 arranged in a soundproof case 20 via a loop adjusting portion R, and a coil material W is slid on a press body 10 by its slide stroke. Corresponding to the intermittent delivery.

As shown in FIG. 2, the press machine is provided with a sound collector 31, a sound reception data generation means 30, a sound data generation means 40, a sound signal generation means 50, and a sound generator 51. These cooperate to develop a silencing function. The tone generation data generating means 40 comprises a sound receiving circuit 32 and an A / D converter 33, and the tone generation signal generating means 50 comprises a D / A converter 52 and a tone generating circuit 53. In FIG. 2, one opening 21 (or 22) is shown.

First, the sound collectors 31 and 31 have a microphone structure and are arranged in the openings 21 and 22. Each sound collector 31 collects noise escaping to the outside through the opening 21 (22) and outputs a sound collecting analog signal Rf having a frequency characteristic according to its magnitude. As shown in FIG. 2, when the vertical axis represents the frequency f and the horizontal axis represents the crank angle θ, the crank angle θ becomes maximum near 180 degrees, as shown in FIG. More specifically, as shown in FIG. 5, it becomes large at the time of the press work entry I and at the break through B.

The sound reception data generation means 30 (32, 33) digitally converts the input sound collection analog signal Rf to generate sound reception data DRF.

Here, the pronunciation data generation means 40 has a frequency characteristic [θ-(-f)] opposite to the frequency characteristic (θ-f) of the received data DRF, based on the input received sound data DRF. It produces the pronunciation data DDF that it has. Data is converted in real time. This tone generation data DDF is converted into an analog tone generation signal Df by the tone generation signal generation means 50 to activate the tone generator 51. That is, when the sounding device 51 having a speaker structure operates to generate sound, the frequency characteristic is reversed, so that the noise generated from the press body 10 and passing through the opening 21 (22) is canceled to reduce the noise. Mute.

The sound collector 31 and the sound generator 51 may be provided outside the soundproof case 20.

Therefore, according to the first embodiment, the sound collector 31 and the sound generator 51 are arranged in the opening 21 (22) of the soundproof case 20 surrounding the press body 10, and the sound reception data generating means 3 is provided. 0, the pronunciation data generating means 40 and the pronunciation signal generating means 50 are provided, and the noise generated from the press body 10 and trying to pass through the openings 21 and 22 is generated by the sound generator 51 having the opposite frequency characteristic. Since the configuration is such that the noise is reduced or muted, it is possible to prevent the noise associated with the press work from leaking and propagating to the outside.

Second Embodiment In the second embodiment, as shown in FIGS. 3 and 4, the pronunciation data generating means 40 is constructed as a storage / reproduction type.

That is, as shown in FIG. 5, the frequency characteristic curve of the noise emitted from the press main body 10 is a fixed shape related to the crank angle θ, that is, the slide stroke motion, and the frequency characteristic is the press work. It depends on factors (modes) such as mode, press speed, and product shape.

Therefore, the frequency characteristic opposite to the frequency characteristic of the noise generated by each factor such as the press work mode is stored, and for the operation of the factor, the reproduction sound is reproduced with the stored frequency characteristic. By doing so, noise can be prevented from leaking to the outside through the openings 21 and 22.

As shown in FIG. 3, the pronunciation data generation means 40 has a CPU 41 that controls operations, commands, executions, a ROM 42 that stores an inverse conversion program for frequency characteristics, and an inversely converted frequency characteristics. A RAM 43 for storing sounding data DDF and the like, a switch panel 44 having a sound collecting instruction switch 44I, a sounding instruction switch 44O, a mode selecting switch 44S, etc., interfaces 45 and 46, and an input port 47 are formed.

The first sound collecting function of the pronunciation data generating means 40 is constructed so as to be expressed as follows. That is, the mode selection switch 44S is used to select the mode according to the press work operation. Then, the sound collection command switch 44I is operated to issue a sound collection command.

Then, the CPU 41 takes in the sound reception data DRF from the sound collector 41 and the sound generation data generating means 30 via the interface 33, and writes and stores it in the RAM 43. At this time, the CPU 41 stores it in association with the crank angle θ from the crank angle detector 60 (for example, an absolute encoder having a resolution of 0.5 degrees) read via the input port 47.

Thus, the CPU 41 reversely converts the sound reception data DRF stored in the RAM 43 into the sound generation data DDF based on the reverse conversion program stored in the ROM 42. This sound generation data DDF is stored in the RAM 43 in correspondence with the crank angle θ and with a selection mode. Hereinafter, the pronunciation data is generated and stored in the RAM 43 for each mode.

Next, the second sound producing function is formed so as to be developed as follows. That is, when a sounding command is issued using the sounding command switch 44O (YES in ST10 of FIG. 4), the CPU 41 calls the sounding data DDF with the selected mode (ST11) using the mode selection switch 44S (ST12). . Further, the crank angle θ is continuously read (ST13).

Here, the CPU 41 confirms that the current value of the crank angle θ during the press work operation and the crank angle attached to the calling sound data DDF have the same θ, that is, are synchronized (YES in ST14). , And outputs the pronunciation data DDF to the pronunciation signal generation means 50. Therefore, the noise generated from the press body 10 and trying to pass through the openings 21 and 22 can be produced with an inverse frequency characteristic (ST15).

Therefore, according to the second embodiment, the same operational effect as in the case of the first embodiment can be obtained, and further, the sound data generation means 40 can be a low-speed processing type so that the cost can be reduced. This is because it is not necessary to perform real-time processing as in the first embodiment. Further, if the sound data DDF for each mode is stored in, for example, a cassette or a floppy instead of the RAM 43, it can be used in other press machines (10, 20) having the same configuration. Moreover, it is not necessary to provide the sound collector 31 and the sound reception data generating means 30 in the other press machines (10, 20).

[0027]

[Effect of device]

 According to the present invention, the sound collector and the sound generator are arranged in the opening of the soundproof case surrounding the press body, and the sound receiving data generating means, the sound generating data generating means and the sound generating signal generating means are provided, and the sound is generated from the press main body. The noise that passes through the opening is reduced or muted by the sound output from the sound generator having the opposite frequency characteristic.Therefore, the noise associated with the press work may be leaked and propagated to the outside. It can be prevented.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram mainly for explaining a mechanical configuration of a first embodiment of the present invention.

FIG. 2 is likewise a block diagram mainly for explaining an electronic configuration.

FIG. 3 is a block diagram showing a second embodiment.

FIG. 4 is likewise a flowchart for explaining a sounding operation.

FIG. 5 is a diagram for explaining frequency characteristics of noise generated from the press body in the present invention and the conventional example.

[Explanation of symbols]

 1 Uncoiler 2 Leveler 3 Feed Roll 10 Press Main Body 13 Slide 20 Soundproof Case 21, 22 Opening 30 Sound Receiving Data Generating Means 31 Sound Collector 32 Sound Receiving Circuit 33 A / D Converter 40 Sounding Data Generating Means 41 CPU 42 ROM 43 RAM 44 switch panel 44I sound collection command switch 44O sounding command switch 44S mode selection switch 50 sounding signal generating means 51 sounder 52 sounding circuit 53 D / A converter 60 crank angle detector DRF sound receiving data DDF sounding data Df sounding signal

Claims (1)

[Scope of utility model registration request] 1. A press body is surrounded by a soundproof case, and a sound collector and a sounder are arranged in an opening of the soundproof case.
Sound reception data generating means for receiving sound signals from the sound collector and generating sound reception data; and sound data generating means for generating sound data having frequency characteristics opposite to the frequency characteristics of the sound reception data as input. A press machine, which receives sounding data as input, generates a signal for reducing or muting press noise leaking to the outside from the opening, and outputs the signal to the sounder. .