JP7090926B2 - Press equipment - Google Patents

Description

The present invention relates to a press device. Here, the "pressing apparatus" in the present specification refers to an apparatus for producing a pressed product from a pressing machine and a pressing die.

In the press machine itself, which is repeatedly pressed, or in the pressed product, the pressed product may crack in the press processing process, or the press machine may break down, resulting in defective products. In some cases. As a countermeasure, it is conceivable to inspect the appearance of the press machine or the pressed product by visual inspection or by using a photographed image to detect defective products at an early stage.

However, in the above-mentioned inspection based on the appearance, if a crack or the like is generated in a portion (inside) that does not appear in the appearance, the detection may be delayed. In addition, there is also a problem that a large amount of labor and time are required for visual inspection.

The present invention has been made with the above-mentioned matters in mind, and an object of the present invention is to provide a press device capable of easily preventing a failure of the press machine itself and improving the quality of the pressed product.

In order to achieve the above object, the press device according to the present invention includes an upper die that can be attached to and detached from a slide and a lower die that can be attached to and detached from a bolster, and the upper die and the lower die are brought close to each other to press the work. It is a press device that performs processing and produces pressed products. It is a press device that continuously measures the gap between the upper and lower dies at different points, and continuously measures by each of the measurement units. A storage unit that stores the change in the gap as a change curve, a diagnostic unit that compares the change curve in one cycle with a reference change curve, and diagnoses the press product or the press device, and each measurement. If the difference from the reference change curve exceeds a certain permissible range in multiple of each change curve obtained from the part, the change curve in which the difference is particularly large (the change curve with the maximum difference or the difference is the maximum). It is provided with a display unit for identifiablely displaying the measurement unit corresponding to (a plurality of change curves occupying the upper ranks including those) (claim 1).

According to the present invention, it is possible to obtain a press device capable of easily preventing a failure of the press machine itself and improving the quality of the pressed product.

That is, in the press device of the invention according to each claim of the present application, a plurality of measuring units are installed, and the presence or absence of cracks or the like in the press device or the pressed product is determined from the measured values of the gap between the upper die and the lower die. I am trying to do it.

It is explanatory drawing which shows schematic structure of the press apparatus which concerns on one Embodiment of this invention. It is a graph which shows an example of the change curve and the reference change curve obtained in the said press apparatus.

Embodiments of the present invention will be described below with reference to the drawings.

In the press device shown in FIG. 1, the gaps between the upper mold 2 detachable from the slide (ram) 1, the lower mold 4 detachable from the bolster 3, and the upper mold 2 and the lower mold 4 are different from each other. It is provided with a plurality of measuring units (for example, gap sensors) 5 for continuous measurement, a driving unit (for example, a motor, etc.), a power transmission mechanism and a control device, which are not shown in the figure. The lower mold 4 is brought close to the work (not shown) to perform drawing processing (an example of pressing processing) to produce a pressed product.

In addition, in FIG. 1, 6 is a wrinkle holding type.

The control device (not shown) includes a drive control unit that controls the drive of the drive unit, a storage unit that stores changes in the gap continuously measured by each measurement unit 5 as a change curve, and a storage unit in one cycle. A diagnostic control unit (an example of a diagnostic unit) for diagnosing the pressed product or the press device by comparing the change curve with the reference change curve, and a display unit are provided. The drive control unit and the diagnostic control unit are embodied by, for example, a CPU or the like that executes a predetermined control program.

The storage unit associates the measured value of the gap obtained by the measuring unit 5 with the cycle motion of the slide 1, for example, the vertical axis represents the vertical gap (measured value of the gap), and the horizontal axis represents the press operation time. It is stored for each cycle as a change curve obtained by plotting.

In addition, the reference change curve that the diagnostic control unit compares with the change curve is normal (no cracks) by pressing the work using a normal press device (in a state where it has been confirmed in advance that there are no cracks). The change curve in one cycle when the pressed product is obtained, or the change curve obtained by averaging the change curves of two or more cycles (for example, the vertical gap at any plurality of press operation times is the average value). 2 (A) and 2 (B) are shown by solid lines. The reference change curve may be updated regularly or irregularly, for example.

Then, the diagnostic control unit compares the change curve obtained by each measurement unit 5 with the reference change curve for each cycle, and the difference between the curves (or the difference between the measured values of the gaps at any plurality of press operation times). Is within a certain range, and if there is something that exceeds a certain allowable range, a warning is given via the display unit or the like, and the difference exceeds a certain abnormal range wider than the allowable range. It is configured to stop the press device of this example if there is something. The specific range of the allowable range and the abnormal range may be determined based on the measured value of the gap when a crack or the like actually occurs in the press device or the pressed product, for example, periodically or irregularly. It is desirable to update.

Specifically, when the above difference occurs, as shown in FIG. 2A, the change curve shown by the broken line shifts in the vertical direction as a whole with respect to the reference change curve shown by the solid line, and the minimum value of the gap is obtained. In addition to the cases where (measured value of the gap when the upper mold 2 and the lower mold 4 are closest to each other) are different, as shown in FIG. 2 (B), until the upper mold 2 and the lower mold 4 are closest to each other. The case where the gap does not shrink smoothly in the process may be mentioned. For example, when the pressed product is cracked, a difference occurs between the change curve and the reference change curve as shown in FIG. 2 (A).

In general, a press device (press machine) may not have a predetermined processing force due to a change in rigidity (crack, deflection, etc.) due to aging, or a crack or the like may progress and break down. In this regard, according to the press device of this example, a plurality of measuring units 5 are installed, and the load change is always read from the measured value in the press production state by the dies (upper die 2 and lower die 4), and the above-mentioned It is possible to clarify the change in rigidity of the dies, prevent failures, and take measures against changes in the quality of pressed products. The effect is to arrange multiple measuring units 5 as far apart as possible and increase the number of them. Can be further enhanced by. In this example, 12 measuring units 5 are arranged in a matrix of 3 rows and 4 columns.

Further, in the press device of this example, the same die is attached to different press devices and the reference change curve is grasped for each, so that the machine difference can be grasped and the die conditions suitable for each press device can be grasped in advance. It is also possible to grasp.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be variously modified and implemented without departing from the gist of the present invention. For example, the following modification examples can be given.

In the above embodiment, the change curve and the reference change curve are obtained at the time of pressing the work. For example, the change curve and the reference change curve are obtained in the upper mold 2 and the lower mold 4 in a state where the work is not pressed. And may be obtained close to each other. That is, if the above diagnosis is performed using the change curve obtained without pressing the work, it is possible to diagnose a failure of the press device, etc., which was obtained during this diagnosis and the press working of the work. When used in combination with the above diagnosis using a change curve, it becomes possible to more easily identify the location where cracks or the like occur (press device or pressed product). Further, the same defect diagnosis can be performed not only for the drawing die but also for the punching die, the bending die and the like.

For example, when a crack occurs in a press device or a pressed product, it is considered that the difference between the change curve obtained and the reference change curve is likely to be large in the measuring unit 5 located closer to the crack. Therefore, for example, when the difference from the reference change curve in a plurality of the change curves obtained from each measurement unit 5 exceeds a certain allowable range, the change curve in which the difference is particularly large (even if only one of the maximum ones is used). The measurement unit 5 may be displayed on an appropriate display unit or the like so that the measurement unit 5 corresponding to the measurement unit 5 occupying the upper rank including the maximum one can be easily specified. In this case, the measurement unit 5 may be displayed. , The location of the crack can be quickly identified. Further, for example, a warning light such as an LED lamp is provided in the vicinity of each measurement unit 5 so as to have a one-to-one correspondence, and the warning light is turned on to correspond to a change curve having a particularly large difference. You may want to indicate the position

Needless to say, the modifications given in the present specification may be combined as appropriate.

1 Slide 2 Upper type 3 Bolster 4 Lower type 5 Measuring unit 6 Wrinkle holding type

Claims (1)

It is a press device that has an upper mold that can be attached and detached to a slide and a lower mold that can be attached to and detached from a bolster, and presses the work by bringing the upper and lower molds close to each other to produce a pressed product.
A plurality of measuring units that continuously measure the gap between the upper mold and the lower mold at different points.
A storage unit that stores changes in the gap continuously measured by each measurement unit as a change curve, and a storage unit.
A diagnostic unit that compares the change curve in one cycle with the reference change curve to make a diagnosis of the press product or the press device.
Of the respective change curves obtained from each of the measurement units, when the difference from the reference change curve exceeds a certain allowable range, the change curve having a particularly large difference (the change curve having the maximum difference or the change curve thereof) A press device provided with a display unit that can identify and display the measurement unit corresponding to (multiple change curves occupying the upper rank including the one with the largest difference) .

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