JPH06190599A - Forging press equipment - Google Patents

Abstract

PURPOSE:To provide a forging press equipment which can surely prevent a seizure accident of a slide gib. CONSTITUTION:In a slide 16 and the left and the right uprights 12, 13, a temperature sensor 21 is provided, respectively. A computer 32 calculates a temperature difference between the slide 16 and the uprights 12, 13 detected by these temperature sensors 21, executes a calculation determined in advance by using this calculated temperature difference, and executes an abnormality display and stops a press operation, when the calculated value reaches a prescribed value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging press device,
In particular, the present invention relates to improvement of a seizure failure prevention means for a slide gib of a forging press device.

[0002]

2. Description of the Related Art In a forging press device, generally, left and right uprights are erected on the upper surface of a press bed, and slides are provided between these left and right uprights via slide gibs so as to be slidable in the vertical direction. In such a forging press device, since the slide moves up and down during the forging die stamping operation, the temperature rises due to the frictional heat. Due to the difference in thermal expansion between the left and right uprights and the slide due to such a temperature rise, the slide-gib gap, which is the gap between the sliding surfaces of the left and right uprights, may decrease and a seizure may occur.

In order to prevent the occurrence of such a seizure accident, the first method in the conventional forging press device is to predict the slide expansion amount and the aplite change amount due to the temperature rise during stamping, and allow some margin. The reduction of the slide-gib gap has been suppressed by setting the gap of the slide-gib held, or as a second method, by incorporating a cooling device such as water cooling inside the slide.

[0004]

In the forging press apparatus according to the first method described above, there is a certain limit when setting the slide gib gap to be small in order to improve the product accuracy, and the temperature is higher than expected. If the slide gib gap is significantly reduced due to the rise, there is a risk that a seizure accident may occur, and the decrease in the slide gib gap cannot be grasped until the seizure accident occurs, so that abnormalities cannot be predicted.

Further, in the forging press apparatus according to the second method, there is a drawback that the apparatus manufacturing cost or maintenance cost increases because the apparatus becomes complicated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a forging press device capable of reliably preventing a seizure failure of a slide gib during forging die stamping.

[0007]

According to the present invention, the uprights provided upright on the upper surface of the bed, and the slides provided between the uprights via the slide gib so as to be slidable in the vertical direction, When a predetermined calculation is performed based on the temperature sensors provided on the slide and the upright, and the temperature difference between the slide and the uprite detected by these temperature sensors, and when the calculation result reaches a predetermined value. Thus, a forging press device provided with means for displaying an abnormality or stopping the pressing operation can be obtained.

According to the present invention, the uprights provided on the upper surface of the bed, the slides vertically slidable between the uprights via the slide gib, and the slides provided on the slides. A temperature sensor, a temperature sensor for measuring the atmospheric temperature arranged outside the press, and a predetermined calculation based on the temperature difference between the slide and the atmosphere detected by these temperature sensors, and the calculation result is a predetermined value. When the value is reached, a forging press device having a means for displaying an abnormality or stopping the pressing operation can be obtained.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a forging press device 10 according to an embodiment of the present invention.
2 is a cross-sectional view of the apparatus shown in FIG. 1 cut along the line BB in FIG. 1, and FIG. 3 is an enlarged view of a main portion showing a part of FIG. 2 in an enlarged manner. .

As shown in FIG. 1, the forging press device 10 is
The bed 11, the left upright 12 and the right upright 13 which are erected on the upper surface of the bed 11, and the left and right uprights 12 and the right upright 13 are provided with slide gibs 14 and 15
Slide 16 slidably provided in the vertical direction via
Etc. As shown in FIG. 2, slide gibs 14 and 15 are provided on the side walls of the left upright 12 and the right upright 13 on the center side of the press. Slide give 1
4 is the front side 1 of the left upright 12 and the right upright 13.
7 and the rear surface side 18, respectively, as shown in FIG. 3, regulates the runout of the slide 16 in the front-rear direction via a liner 19. Further, the slide gib 15 is provided inward of the slide gib 14 and regulates the lateral deflection of the slide 16 via a liner 19.

A liner 20 is also provided on the slide 16 so as to face the liner 19 attached to the slide give 14, 15. A slide gib gap t is set between the liner 19 and the liner 20.

As shown in FIG. 2, each of the left upright 12 and the right upright 13 is provided with an upright temperature sensor 21, and a slide 16 is also provided with a slide temperature sensor 22. The temperature of each part inside is detected and monitored. Further, instead of the temperature sensor 21 for upright, as shown in FIG. 1, an atmosphere temperature sensor 23 for measuring the temperature in the atmosphere may be arranged near the forging press device.

An upright temperature sensor 2 attached to the left upright 12, the right upright 13 and the slide 16.
1. The slide temperature sensor 22 is preferably installed at a location where the average temperature of each member can be measured. That is, the left upright 12 and the right upright 13 are preferably located at the central member forming the member, and at the slide 16, the center position in the width direction of the slide 16 or the intermediate position between the adjacent liners 20, 20 is desirable. It is desirable that the atmospheric temperature sensor 23 is located near the press without being affected by the working temperature of the press.

The electric output signals of the temperature sensors 21, 22 or the temperature sensors 22, 23 are amplified by an amplifier 31 and supplied to a computer 32 as shown in FIGS. The computer 32 is the temperature sensor 2
1, 22 or the electrical output signals of the temperature sensors 22, 23 are processed to generate a signal 33 necessary for controlling the forging die stamping operation of the forging press device 10, for example, an abnormal signal or a stop signal.

Next, the operation of the forging press device 10 according to the embodiment of the present invention will be described. During the forging die-pressing operation of the forging press device 10, the slide 16 moves up and down, so that the liner 20 of the slide 16 and the liner 19 of the slide gibs 14 and 15 come into sliding contact with the liners 19 and 20 and the slide gibs 14 and 15 respectively. Temperature rises. However, increasing the temperature of this portion alone does not have much effect on the slide gib clearance t, which is the clearance between the liners 19 and 20 shown in FIG.

The most significant effect on the slide-gib clearance t is that the left upright 12, the right upright 13 and the slide 16 rise in temperature and expand differently during the preheating of the forging die and the forging of the heated material. is there. That is,
Left upright 12, right upright 13 and slide 16
If the temperature rises at the same temperature, there is no problem, but in reality, the temperature rises are different, so the amount of thermal expansion changes, and as a result, the slide gib gap t decreases.

Therefore, in the forging press device 10 of the present invention, each temperature is measured by the temperature sensor 21 for upright, the temperature sensor 22 for slide, or the temperature sensor 22 for slide, and the temperature sensor 23 for atmosphere, and these results are obtained. It is used to predict the amount of decrease in the slide-gib gap t.

That is, in the forging press device 10, the slide gib gap t changes as shown in FIG. 6 due to die preheating before starting the die stamping operation and heat during the die stamping operation.
The vertical axis of FIG. 6 represents the amount of change C (mm) in the slide-gib gap t, and the horizontal axis represents time (H). The change amount C of the slide gib gap t increases downward with reference to 0.

In FIG. 6, from time 0 to h1, there is a residual heat period, and the amount of change in the slide gib gap t gradually increases from 0 and reaches the peak value C1. In the stamping operation period from time h1 to time h2, the change amount C of the slide gib gap t gradually decreases immediately after the stamping operation start time h2, and is maintained at a substantially constant value thereafter. From the time h2 to h3 when the stamping operation period ends, there is a rest period. During this period, the change amount C of the slide gib gap t gradually decreases, but the value C2 before returning to 0 is maintained in the state of the value C2. The remaining heat period (h3-h4) is started. From time 0 to h3, the first stamping operation cycle H1 is formed.

From time h3 to h6, the second stamping operation cycle H2 is formed, and the first stamping operation cycle H1.
The same operation as is repeated. However, in this second stamping operation cycle H2, the change amount C3 of the slide gib gap t at the end of the residual heat period h4 is the change amount C1 at the corresponding time h1 in the first stamping operation cycle H1.
Will be larger than.

Further, at the end time h6 of the second stamping operation cycle H2, the change amount C of the slide gib gap t.
4 is larger than the value C2 at the end time h3 of the first stamping operation cycle H1. Therefore, in the third stamping operation cycle H3, at the end of the residual heat period h
The change amount C5 of the slide gib gap t of 7 becomes larger than the change amount C3 at the corresponding time h4 in the second stamping operation cycle H2, and exceeds the limit change amount Cmax.

As described above, the phenomenon that the slide gib gap t exceeds the gap limit value occurs when the forging press device is continuously operated day and night, or when the die preheating time is long and a large amount of heat is applied. If die stamping is started in a state where the value exceeds the value, there is a possibility that a slide gib seizure may occur.

By the way, the inventor of the present invention has found that the gap between the slide gibs t.
It was noted that there is a certain correlation between the amount of change in the slide temperature and the temperature difference between the slide temperature and the upright temperature as expressed by the following equation, and the change in the slide-gib gap can be predicted by monitoring both temperatures.

C = A (T1-T2) + B where C: slide gib gap change amount T1: slide temperature, T2: upright temperature A: coefficient corresponding to temperature difference (T1-T2) B: constant . The slide temperature T1 and the upright temperature T2 are measured by the slide temperature sensor 22 and the upright temperature sensor 21, respectively. Further, the slide temperature T1 and the upright temperature T2 during the press stop and the stamping operation are measured together with the slide gib gap reduction amount C. The computer 32 of FIG. 4 uses these measured data prior to the actual operation of the forging press device and uses the measured data to perform regression analysis with the slide gib gap reduction amount as the target variable to determine the coefficient A and the constant B in the above equation. To get

In the actual operation of the forging press machine, the computer 32 reads the output signal data of the upright temperature sensor 21 and the slide temperature sensor 22, and calculates the slide gib gap t by the above-mentioned formula stored in advance. Then, the computer 32 causes the limit value Cmax of the amount of change C of the slide gib gap t stored in advance to be stored.
And the calculated value C are compared, and the change amount calculated value C is the limit value Cma.
The operation of the forging press device 10 is continued during x or less. On the other hand, the computer 32 determines that the change amount calculated value C is the limit value Cm.
When it exceeds ax, an abnormality of the forging press device or a device stop signal is output. These signals cause the forging press device 10 to generate an abnormal alarm or automatically stop the device.

In the above embodiment, the change in the slide-gib gap t is predicted by noting that there is a certain correlation between the amount of change in the slide-gib gap and the temperature difference between the slide temperature and the upright temperature. There is also a certain correlation between the temperature difference between the slide temperature and the atmospheric temperature and the amount of change in the slide-gib gap t, as shown in the following equation. Predicting the change in the slide-gib gap using this relationship. You can also

C = A · (T1−T3) + B where C: slide gib gap change amount T1: slide temperature, T3: atmospheric temperature A: coefficient corresponding to temperature difference (T1−T3) B: constant slide temperature The temperature T1 and the atmospheric temperature T3 are measured by the slide temperature sensor 22 and the atmospheric temperature sensor 23, respectively. Further, changes in the slide temperature T1 and the atmospheric temperature T3 during the press stop and the stamping operation are measured together with the slide gib gap reduction amount C.

The computer 32 shown in FIG. 4 uses the measured data of these prior to the actual operation of the forging press apparatus, similarly to the above-described embodiment, and performs the above-mentioned regression analysis by using the slide gib gap reduction amount as the objective variable. A regression equation that determines the coefficient A and the constant B in the equation is obtained. In the actual operation of the forging press device, the computer 32 reads the output signal data of the slide temperature sensor 22 and the atmospheric temperature sensor 23, and calculates the slide gib gap by the above-mentioned formula stored in advance.

Then, the computer 32 causes the limit value Cma of the change amount C of the slide gib gap t stored in advance to be stored.
x and the calculated value C are compared, and the change amount calculated value C is the limit value Cm.
The operation of the forging press device 10 is continued during the time period equal to or lower than ax, and when the variation calculation value C exceeds the limit value Cmax, the forging press device abnormality or the device stop signal is output. These signals cause the forging press device 10 to generate an abnormal alarm or automatically stop the device.

[0030]

EFFECTS OF THE INVENTION According to the present invention, it is possible to predict a decrease in the slide-gib gap caused by continuous operation of the forging press device for a long time or preheating, or long-term residual heat of the press die or excessive preheating due to high heat or the like. As a result, it is possible to reliably prevent a seizure accident.

[Brief description of drawings]

FIG. 1 is a side view of a forging press device according to an embodiment of the present invention.

2 is a cross-sectional view of the device shown in FIG. 1 taken along the line BB in FIG.

FIG. 3 is an enlarged view of an essential part showing a part of FIG. 2 in an enlarged manner.

FIG. 4 is a schematic view of the present invention in which a temperature sensor is provided on the upright and the slide.

FIG. 5 is a schematic view of the present invention in which a slide and a temperature sensor are provided in the atmosphere.

FIG. 6 is a graph showing the relationship between the amount of change in the slide-gib gap and time, for explaining the operation of the forging press device according to the example of the present invention.

[Explanation of symbols]

 10: Forging press device 11: Bed 12: Left upright 13: Right upright 14, 15: Slide gib 16: Slide 17: Front side of upright 18: Back side of upright 19, 20: Liner 21: Temperature sensor for upright 22: Temperature sensor for slide 23: Temperature sensor for atmosphere

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Kenji Hiraishi 5-2 Sokai-cho, Niihama-shi, Ehime Sumitomo Heavy Industries, Ltd. Niihama Works

Claims (2)

[Claims] 1. An upright standing on the upper surface of a bed, a slide slidably provided between these uprights via a slide gib, and temperatures provided on the slide and the upright respectively. A sensor and means for performing a predetermined calculation based on the temperature difference between the slide and the upright detected by these temperature sensors, and stopping the abnormal display or the press operation when the calculation result reaches a predetermined value. Forging press device equipped with and. 2. An upright standing on the upper surface of a bed, a slide slidably provided between these uprights via a slide gib, a temperature sensor provided on the slide, and a press. When a predetermined calculation is performed based on the temperature sensor for outside air temperature measurement placed outside and the temperature difference between the slide and the atmosphere detected by these temperature sensors, and when this calculation result reaches a predetermined value , A forging press device having means for displaying an abnormality or stopping the pressing operation.