JP3189476B2 - Press working condition setting method and apparatus for press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press machine, and more particularly to a method and an apparatus for setting press working conditions in accordance with a die to be used.

[0002]

2. Description of the Related Art Conventionally, a press machine for performing a press working by moving a pair of removably mounted molds close to and away from each other has been widely used. In some cases, press working conditions can be adjusted. For example, FIGS. 2 and 3 show an example of a single-action type press machine for performing drawing, in which drawing is performed by a die 18 and a punch 12 while wrinkling is suppressed by a wrinkle holding ring 30. Air cylinder 42 affecting load
The press working conditions such as the air pressure Pa and the relative distance h (corresponding to the die height) affecting the press load can be changed by the ON / OFF supply / exhaust valve 46, the servomotor 60 and the like. The wrinkle holding load and the press load for performing appropriate press working differ from one mold to another, and the weight of the wrinkle holding ring 30 and the die 18 forming the mold differ from one mold to another. Therefore, the air pressure Pa, the relative distance h, and the like need to be adjusted for each die to be used, and these are adjusted by trial and error while performing trial hitting in advance so that desired press working is performed. Is common.

On the other hand, in the Japanese Patent Application No. 4-114004 filed earlier, the applicant of the present invention disclosed the press working conditions such as the air pressure Pa based on the mold information unique to the mold and the machine information unique to the press machine. We have proposed a press working condition setting device in which is automatically set. For example, when the air pressure Pa is specifically described, the wrinkle holding load Fso and the wrinkle holding ring 3 can perform appropriate drawing.
The weight Wr of 0 and the number n of the cushion pins 24 to be used are previously obtained for each mold by a tri-press (a press machine that performs a trial punching at the time of mold production) or the like, and the cushion pad 28 is obtained.
Using the weight Wa of the cushion pin 24, the weight Wp of the cushion pin 24, and the pressure receiving area Aa of the air cylinder 42, the air pressure Pax is calculated according to the following equation (1), so that the air pressure Pa in the air tank 44 becomes the air pressure Pax. Then, the ON / OFF supply / exhaust valve 46 is switched and controlled.

Pax = (Fso + Wa + Wr + n · Wp) / Aa (1)

[0004]

However, in a press machine that performs a plurality of types of press working while exchanging the mold, even if the same mold is used again, the press working conditions are determined based on the above mold information and the like. The setting must be reset. For example, when setting the die height h, there is a problem that the operation rate of the press machine is not always good, for example, several trial shots are required each time.

The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to immediately reproduce the previous press working conditions when the same die is used on the same press machine. It is in.

[0006]

In order to achieve the above object, the set press working conditions may be stored, and the first invention is based on a pair of removably mounted press working conditions. Performing press working by moving the mold closer and farther, in a press machine capable of adjusting the press working conditions affecting the press working, a method of setting the press working conditions according to the mold used, (A) an adjusting step of adjusting the pressing conditions so that a proper pressed product is obtained using a press machine used for actual pressing; and (b) an adjusting step of adjusting the pressing conditions adjusted in the adjusting step. And (c) the same mold adjusts the press working conditions in the adjusting step.
And a reproducing step of reproducing the press working conditions stored in the storage means when the press machines are arranged in the same press machine used in (d), and (d) in the press machine, pressure chambers communicate with each other. A pressure equalizing cushion device for applying a wrinkle holding load substantially uniformly by a large number of hydraulic cylinders is provided, and the press working condition is a hydraulic pressure of a hydraulic cylinder of the pressure equalizing cushion device.

[0007]

[The first operation and effect of the invention That is, when the first time of the mold, equalizing proper pressed product using a press machine to be used for actual pressing in the adjustment process is pressing conditions so as to obtain The oil pressure of the pressure cushion device is adjusted, and the adjusted oil pressure of the pressure equalizing cushion device is stored in the storage means in relation to the press machine and the mold. In the adjustment step, the hydraulic pressure of the equalizing cushion device can be adjusted so that a proper pressed product can be obtained by trial and error, but a predetermined die for each die is used to obtain a proper pressed product. based on the information, or to adjust while examining the press machine specific machine characteristics, further Hitoshi圧Ku
The machine information specific to the press machine required for setting the hydraulic pressure of the cushioning device may be obtained in advance, and the adjustment may be made based on the machine information and the mold information. If the storage means is attached to the press machine, the type of the mold and
It is sufficient to store the oil pressure of the equalizing cushion device as a pair, and when the storage means is attached to the mold, the type of the press machine and the oil pressure of the equalizing cushion device are stored as a pair. If the storage means is not attached to any of them, the type of the mold, the type of the press machine and the equalizing cushion
What is necessary is just to memorize in combination with the hydraulic pressure of the device . Then, when the mold is used again in the same press machine, the hydraulic pressure of the pressure equalizing cushion device stored in the storage means is immediately reproduced without performing the adjustment in the adjusting step.

Accordingly, in the press machine that performs a plurality of types of press working while exchanging the mold, in the case of using the same mold again, there is no need to adjust the hydraulic pressure of each time pressure equalizing cushion device immediately proper Hitoshi Of pressure cushion device
The hydraulic pressure is reproduced, so that the burden on the operator is reduced and the operation rate of the press machine is improved.

[0009]

In order to achieve the above object, a second aspect of the present invention is to move a pair of removably mounted dies toward and away from each other as shown in FIG. A press machine capable of adjusting the press working conditions affecting the press work while setting the press working conditions in accordance with the die to be used. And (b) a press machine used for actual press working based on the mold information input by the input means. Adjusting means for adjusting the press working conditions so as to obtain a proper pressed product by using the adjusting means; and (c) adjusting the press working conditions adjusted by the adjusting means to the relationship between the press machine and the die. A storage storing means, for adjusting the pressing condition in the adjustment step (d) same mold
When placed on the same press machine used for
Reproducing means for reproducing the press working conditions stored in the storage means, and (e) the press machine comprises:
The pressure chamber has a pressure equalizing cushion device that applies a wrinkle holding load substantially uniformly by a number of hydraulic cylinders connected to each other. It is characterized by.

[0010]

[Operation and effect of the second invention] That is, the second invention relates to a press working condition setting device which preferably implements the first invention, and in the case of the first die, the metal input by the input means. based on the type information, Hitoshi proper pressed product using a press machine to be used for actual pressing the adjusting means is a press working conditions so as to obtain
Hydraulically adjust the pressure cushion device, pressure equalization after the adjustment
The hydraulic pressure of the cushion device is stored in the storage means in relation to the press machine and the mold. The adjusting means equalizes the pressure using the machine information of the press machine and the mold information stored in advance.
Although the configuration may be such that the hydraulic pressure of the cushion device is adjusted, the hydraulic pressure of the pressure equalizing cushion device may be adjusted based on mold information while checking the machine characteristics unique to the press machine. If the storage means is attached to the press machine, the type of the mold and the pressure equalizing cushion device
Of the hydraulic well by storing in pairs, when the storage means is associated with the mold of the press machine type and pressure equalization cookies
It is sufficient to store the hydraulic pressure of Deployment apparatus in pairs, when the storage unit is not associated to any is stored in combination with the hydraulic pressure of the mold type and the press of the type of machine and the pressure equalizing cushion device You should do it. Then, when the mold is used again in the same press machine, the pressure equalization cushion stored in the storage means is not adjusted by the adjustment means.
Immediately reproduce the hydraulic pressure of the installation device by the reproduction means.

Therefore, when the same die is used again in a press machine that performs a plurality of types of press working while exchanging the die, an appropriate pressure equalizing cushion device is immediately provided.
The hydraulic pressure of the machine is reproduced, and the operating rate of the press machine is improved. In the second invention, the first equalizing cooker is used.
Since the adjustment of the hydraulic pressure of the operation device is automatically performed based on the mold information, the burden on the operator is greatly reduced and superior quality compared to the conventional adjustment by trial and error. Can be obtained stably.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 2 shows an example of a single-action press machine 10 for drawing a car outer panel panel or the like. A bolster 14 to which a punch mold 12 is attached is fixedly disposed on a base (not shown) via a bed 16. On the other hand, the slide plate 20 to which the die 18 is attached is moved up and down by four plungers 22. In the bolster 14,
In order to arrange the cushion pin 24, a large number of through holes 26 are provided.
A cushion pad 28 for supporting the cushion pins 24 is provided below the bolster 14. The cushion pins 24 support the wrinkle holding ring 30 provided together with the punch die 12, and are provided at an arbitrary number at predetermined positions predetermined according to the shape of the wrinkle holding ring 30 and the like. You. The punch die 12 and the wrinkle holding ring 30 and the die die 18
Corresponds to a pair of dies which are detachably attached to the press machine 10 and are used. The drawing process is performed.

The cushion pad 28 has a number of hydraulic cylinders 32 corresponding to the through holes 26,
The lower ends of the cushion pins 24 are each brought into contact with the piston of the hydraulic cylinder 32.
The cushion pad 28 can be moved up and down while being guided by the guide 40, and is always urged upward by the air cylinder 42.
The pressure chamber of the air cylinder 42 communicates with an air tank 44, and the air tank 44
The ON / OFF supply / exhaust valve 4 is connected to a pressure air source 48 in the factory via an N / OFF
The air pressure Pa in the pressure chamber and in the air tank 44 is adjusted by the switching control of 6. The air pressure Pa is detected by the air pressure sensor 50.
When the cushion pad 28 is pressed down via the wrinkle holding ring 30 and the cushion pin 24 during the press working, a wrinkle holding load Fs corresponding to the air pressure Pa is applied to the wrinkle holding ring 30. A plurality of air cylinders 42 are provided as necessary. The pressure chambers of the air cylinders 42 are connected to a common air tank 44. The pressure chambers of the plurality of hydraulic cylinders 32 are communicated with each other. When hydraulic oil is supplied from the electric pump 34 and the electromagnetic on-off valve 36 is controlled to open and close, the hydraulic pressure Ps in the pressure chambers is controlled. Is to be adjusted. This oil pressure Ps is detected by the oil pressure sensor 38. The hydraulic pressure Ps is adjusted such that the wrinkle pressing load Fs acts on the plurality of cushion pins 24 substantially uniformly. Cushion pad 28, hydraulic cylinder 3
The pressure equalizing cushion device 51 includes the second and second cushion pins 24.

On the other hand, the plunger 22 is connected to the slide plate 20 via a die height adjusting mechanism 52 as shown in FIG. The die height adjusting mechanism 52 is provided on a screw shaft 54 provided integrally with the plunger 22, and a nut member 56 screwed to the screw shaft 54 and a worm wheel 58 fixed to the nut member 56. And a servomotor 60 that rotationally drives the worm screwed to the worm wheel 58. When the worm wheel 58 and the nut member 56 are rotated in the forward and reverse directions by the servomotor 60, the height position of the die height adjustment mechanism 52 with respect to the screw shaft 54, that is, the relative distance h of the slide plate 20 with respect to the plunger 22, is increased. Be changed.
This relative distance h is detected by a rotary encoder 59 (see FIG. 4) provided on the servomotor 60.
As the relative distance h increases, the slide plate 20 increases.
Is lowered with respect to the plunger 22, and the plunger 2
Since the pressing force when 2 reaches the lower end is changed, the relative distance h is adjusted according to the press load Fp at the time of drawing. The four plungers 22 are each connected to the slide plate 20 via the die height adjustment mechanism 52, and the relative distance h is adjusted. Each plunger 22 has a strain gauge 6
1 is attached, and each load Foi (i = 1, 2, 3, 4) acting on each plunger 22 is detected. The load Foi is obtained from a data map or the like that stores the relationship between the output signal of the strain gauge 61 and the value measured by the load measuring device 100 shown in FIG.

The die height adjusting mechanism 52 includes a piston 6 of a hydraulic cylinder 62 provided to prevent overload.
4, while the housing of the hydraulic cylinder 62 is integrally provided on the slide plate 20. The hydraulic chamber 62 is filled with hydraulic oil and the pressure chamber is communicated with an oil chamber 68 of the cylinder 66. Air chamber 70 of cylinder 66
Is connected to an air tank 72, and the air tank 72 is an electromagnetic ON / OFF supply / exhaust valve 7.
4 and connected to the pressure air source 48,
By controlling the switching of the N, OFF supply / exhaust valve 74, the air pressure Pc in the air chamber 70 and the air tank 72 is adjusted. The air pressure Pc is detected by the air pressure sensor 76. When an excessive load acts on the hydraulic cylinder 62, the air pressure Pc causes the piston to retreat toward the air chamber 70 and the die height adjusting mechanism 52
The pressure is adjusted according to the pressing ability of the press machine 10 so as to allow the press machine 10 and the slide plate 20 to approach each other and prevent damage to the press machine 10 and the mold. The hydraulic cylinder 62, the cylinder 66, the air tank 72, and the like are provided at connection portions between the four plungers 22 and the slide plate 20, respectively.
Is regulated.

The slide plate 20 is connected to four balancer air cylinders 80 disposed on a machine frame 78 (see FIG. 2) of the press machine 10. The pressure chamber of the air cylinder 80 is communicated with an air tank 82, and the air tank 82 is an electromagnetic ON / O
It is connected to the pressure air source 48 via the FF supply / exhaust valve 84, and the ON / OFF supply / exhaust valve 84 is switched so that the air pressure Pb in the pressure chamber or in the air tank 82 is adjusted. Has become. This air pressure P
The pressure b is detected by the air pressure sensor 86, and the pressure is adjusted to balance the weight of the slide plate 20 and the die 18. The pressure chambers of the four air cylinders 80 are connected to a common air tank 82.

The press machine 10 includes a controller 90 as shown in FIG. 4, and outputs from the air pressure sensors 50, 86, 76, the oil pressure sensor 38, the rotary encoder 59, and the strain gauge 61. Air pressure P
Signals representing a, Pb, Pc, oil pressure Ps, relative distance h, and load Foi are supplied to the controller 90, respectively. The controller 90 is constituted by a microcomputer having a CPU, a RAM, a ROM, an input / output interface circuit, an A / D converter, etc., and performs signal processing in accordance with a program stored in the ROM in advance while utilizing a temporary storage function of the RAM. And outputs drive signals for switching the ON / OFF supply / exhaust valves 46, 84, 74 and the opening / closing valve 36, and changing the operating states of the pump 34 and the motor 60. In the figure, motor 60, strain gauge 61, O
Although only one N, OFF supply / exhaust valve 74 and one air pressure sensor 76 are shown, the same processing is performed for each of the number provided in the press machine 10, in this embodiment, four each.

A setting device 92 such as a keyboard and a personal computer, and a transceiver 94 are also connected to the controller 90. Machine information unique to the press machine 10 is input from the setting device 92 in advance, while Mold information specific to the mold to be used is input. That is, the punch mold 12 stores mold information unique to the mold and an ID card 96 (FIG. 2) having a transmission function and a battery.
) Is attached, and by receiving the data capture signal transmitted from the transceiver 94, mold information is transmitted from the ID card 96, and the mold information is transmitted to the controller 90 via the transceiver 94. It is taken in. FIG. 6 is a functional block diagram of the ID card 96. The mold information memory 125 stores mold information.
A transmission / reception control CPU 126, a transceiver 127, and a press condition data memory 128 are provided.

The machine information and the mold information are based on the air pressures Pa, Pb,
Information required to determine the hydraulic pressure Ps and the relative distance h,
For example, it is as follows. The mold information includes
Information such as the type of the mold, that is, the vehicle type and product number, the press machine used, the process, and the like are also included. (Machine information)-Weight Wa of cushion pad 28-Weight Wp of cushion pin 24-Weight Ws of slide plate 20-Pressure receiving area Aa of air cylinder 42-Pressure receiving area (total of four) Ab of air cylinder 80-Hydraulic cylinder 32 The pressure receiving area As of 32 ・ The bulk modulus K of the hydraulic oil supplied to the hydraulic cylinder 32 ・ The average run-in dimension Xav of the piston of the hydraulic cylinder 32 ・ The oil amount V ・ h-Fpi provisional characteristics (Fpi = a ・ h) (gold (Type information)-Weight Wr of wrinkle holding ring 30-Weight Wu of upper die (die type 18)-Wrinkle holding load Fso-Press load Fpoi-Number of cushion pins 24 used n

Here, the weight Wa of the cushion pad 28
Is the value obtained by subtracting the sliding resistance. For example, by measuring the load on the slide plate 20 while changing the air pressure Pa using the load measuring device 100 shown in FIG. It can be obtained from the characteristics. The load measuring device 100 includes a punch type 12, a die type 1
8. A box-shaped positioning member 102 which is provided in the press machine 10 in place of the wrinkle holding ring 30 and measures the load of each part of the press machine 12 and is fixed on the bolster 14; A load measuring table 106 is provided inside the member 102 so as to be vertically movable, and has a plurality of pins 104 protruding from the lower surface thereof in correspondence with the plurality of cushion pins 24. Positioning member 10
2, a plurality of notches 108 are formed so that the plurality of cushion pins 24 can be arranged. The load measuring table 106 is provided with a plurality of notches 108 inserted through the through holes 26 and the notches 108. It is designed to be placed on the cushion pin 24 via the pin 104. The positioning member 1
02 at the four corners of the column
10 are provided, and four pressed members 112 are fixedly provided at the four corners of the upper surface of the load measuring table 106 where drawing is generally performed, that is, at the portion where wrinkle pressing is performed. , Their columnar portions 110, the pressed member 1
12, strain gauges 114 and 116 are attached, respectively. Also, a strain gauge 118 is attached to a predetermined position of the plurality of pins 104 as needed. Then, the strain gauges 114, 116, 118
A load waveform is recorded by an electromagnetic oscilloscope 122, which is connected to a dynamic strain meter 120 having an amplifying function, a zero point adjusting function, and the like. The positioning member 102 and the load measuring table 1
06, the pressed member 112 has higher rigidity than a normal mold. Each of the strain gauges 114, 116, and 118 has one columnar portion 110,
Four are mounted around the perimeter 04 and connected to form a bridge circuit. The strain gauge 114
Is used to measure the outer load (wrinkle holding load) of a double action press machine.
Is used to measure the inner load (forming load) of a double action press machine and the press load of a single action press machine. The strain gauge 118 measures the transmitted load of each cushion pin 24 of the pressure equalizing cushion device 51. It is for measuring.

In measuring the load of the single-action press machine 10, when the slide plate 20 is lowered by the plunger 22 and comes into contact with the pinched member 112 of the load measuring table 106 supported on the cushion pin 24. , The load measuring table 106 is mounted on the air cylinder 42.
Is displaced against the urging force of the strain gauges 11 provided on the four pressed members 112.
6 respectively. Further, when the slide plate 20 further descends and the load measuring table 106 comes into contact with the positioning member 102, the load detected by the strain gauge 116 rapidly rises in accordance with the rigidity of each part of the press machine 10. FIG. 8 illustrates a change in load detected by the strain gauge 116 provided on any one of the columns 112. The load Fsi corresponds to a wrinkle holding load, the load Ffi corresponds to a forming load, The load Fpi is a press load obtained by adding them. FIG. 9 is a graph showing the wrinkle holding load Fsi measured while changing the air pressure Pa of the air cylinder 42. The load Fxi obtained from this graph is shown in FIG.
Is used to determine the weight Wa of the cushion pad 28. That is, four measured values Fxi (i = 1, 2, 2)
The weight W is obtained by subtracting the weight of the load measuring table 106 and the cushion pin 24 from the total load Fx of (3, 4).
a is required. The weight Wa can also be obtained from a graph of the total load Fs of the wrinkle holding load Fsi and the air pressure Pa. The weight Wa is obtained by subtracting the sliding resistance and the like of the air cylinder 42 from the actual weight of the cushion pad 28. Also, the press machine 10 including the air leakage of the air cylinder 42 and the detection error of the air pressure sensor 50 is included. It is a unique value. The actual weight of the cushion pad 28 and the sliding resistance may be divided into machine information.

The weight Wp of the cushion pin 24 is an average value of a large number of cushion pins 24 used in the press machine 10. It is the value obtained by subtracting the sliding resistance between them. In particular,
By operating the press machine 10 to detect the load Foi when the slide plate 20 is lowered by the strain gauge 61 and changing the air pressure Pb of the air cylinder 80, the total load F of the four strain gauges 61 is changed.
The o-air pressure Pb characteristic is obtained, and the weight Ws can be obtained from the total load Fo-air pressure Pb characteristic in the same manner as in the case of the cushion pad 28. The sliding resistance can be separately set as machine information. The pressure receiving area Aa of the air cylinder 42 takes into account air leakage of the air cylinder 42 and the like.
The slope of the graph of the total load Fs of si and the air pressure Pa corresponds to the pressure receiving area Aa. When a plurality of air cylinders 42 are provided, the total area is set as the pressure receiving area Aa. The pressure receiving area Ab of the air cylinder 80 is the sum of the four air cylinders 80 and is obtained from the total load Fo-air pressure Pb characteristic in the same manner as the pressure receiving area Aa. The pressure receiving area As of the hydraulic cylinder 32 is an average value of a large number of hydraulic cylinders 32. For example, when obtaining the characteristics of the wrinkle pressing load Fsi and the air pressure Pa in FIG. It can be obtained from the total wrinkle holding load Fs-oil pressure Ps characteristic.

The bulk modulus K is determined according to the hydraulic fluid used, and the average drive-in dimension Xav is used to evenly contact the plurality of cushion pins 24 with the wrinkle holding member such as the wrinkle holding ring 30. The downward stroke of the piston of the hydraulic cylinder 32, regardless of variations in the length of the cushion pin 24, inclination of the cushion pad 28, etc., the piston of the hydraulic cylinder 32 is driven downward by all the cushion pins 24, In order to prevent the piston of the hydraulic cylinder 32 from reaching the stroke end irrespective of the shock acting on the cushion pin 24 when the slide plate 20 is lowered, it is necessary to experimentally determine whether the piston pin of the hydraulic cylinder 32 has reached the stroke end or to determine the variation in the length of the cushion pin 24 or the hydraulic cylinder. It is determined based on the maximum stroke of the 32 pistons and the like. The oil amount V is the total capacity of the hydraulic oil present on the hydraulic cylinder 32 side with respect to the check valve 39 (see FIG. 2) when the piston of each hydraulic cylinder 32 is positioned at the rising end.

H-Fpi provisional characteristics (i = 1, 2, 3, 4)
Is the press load F when the plunger 22 reaches the lower end.
The characteristics of pi and the relative distance h are different depending on the rigidity of the mold to be used. The press load Fpi when the plunger 22 reaches the lower end is measured by the gauge 61.
0 reflects the rigidity. When measuring the h-Fpi provisional characteristics, the slide plate 2 is held in a state where the lift force by the slide plate 20 and the air cylinder 80 is balanced.
The adjustment is performed by adjusting the air pressure Pb so that 0 is lowered by the plunger 22. One-dot chain line in FIG. 10 is an illustration of an example of such a h-Fpi temporary characteristics (Fpi = a · h), defined as the basis of the maximum value h ₀ of the relative distance h when the pressing load Fpi 0 ing. Also, this h-
The provisional Fpi characteristics are determined for each of the four die height adjustment mechanisms 52, and the overall press load Fp is the sum of each Fpi. The h-Fpi provisional characteristic can be obtained from the load Fpi in FIG. 8 using the load measuring device 100.

The wrinkle holding ring 30 in the mold information
The weight Wr of the die die 18 and the weight Wu of the die die 18 are actual measurement values measured after manufacturing the wrinkle holding ring 30 and the die die 18, and the wrinkle pressing load Fso and the press load Fpoi are measured.
In the case of (i = 1, 2, 3, 4), the wrinkle holding ring 30, the die 18 and the punch 12 are attached to a test tri-press and actually pressed to obtain a proper pressed product. The load condition is obtained by trial and error. The wrinkle holding load Fso and the pressing load F
The poi excludes the influence of the weight of the mold, the sliding resistance of each part of the tri-press, and the like. For example, when a tri-press configured in the same manner as the press machine 10 in FIGS. The air pressure Pb is adjusted so that the slide plate 20 is lowered by the plunger 22 in a state where the plate 20 and the die 18 and the lifting force of the air cylinder 80 are balanced. Load F detected by
It can be determined based on oi. The wrinkle holding load Fso in this case is the entire load, but the press load Fpoi is 4
At each point of the press load, the total press load is the sum of their press loads Fpoi. The number n of the cushion pins 24 to be used is determined according to the shape of the wrinkle holding ring 30 and the like so that an appropriate pressed product can be obtained.

The press working condition data memory 1 shown in FIG.
28 is a relative distance h ^* corresponding to the machine number of the press machine 10 ^.
Is written via the transceivers 94 and 127, and is read into the press machine 10 via the transceivers 127 and 94. This relative distance h ^* is
The value after adjusting the relative distance h of the die height adjustment mechanism 52 so that the press work is performed with the press load Fpoi as the mold information when the mold is actually attached to the press machine 10 and the press work is performed. And can be stored for a plurality of press machines 10. Therefore, when press working is performed again with the same press machine 10, the relative distance h of the die height adjusting mechanism 52 is adjusted according to the relative distance h ^* corresponding to the machine number,
Press working is performed with a press load Fpoi. Relative distance h
^{* Indicates} that when the relative distance h at each of the four locations is adjusted as in the press machine 10 of the present embodiment, the four locations are respectively stored.
If the relative distance h of the location is adjusted uniformly, the single relative distance h ^* is stored.

Returning to FIG. 4, the controller 90
By performing signal processing according to a predetermined program in the ROM, the functions shown in FIG. 5 are executed. In FIG. 5, a machine information memory 130 stores machine information previously input by the setting device 92, and includes a mold information memory 132.
Stores the mold information read from the ID card 96 by the transceiver 94 with the mold attached to the press machine 10. If the press working condition data memory 128 of the ID card 96 stores data on the relative distance h ^* of the same machine number as the machine number of the press machine 10,
Data on the relative distance h ^{* is} also stored in the mold information memory 13.
2 is stored. The air pressure Pax calculation block 134
Is based on the machine information stored in the machine information memory 130 and the mold information stored in the mold information memory 132, the air pressure Pax for generating the wrinkle pressing load Fso set as the mold information. Is calculated according to the following equation (2). The air pressure Pa adjustment block 136 is turned on and off so that the air pressure Pa in the air tank 44 detected by the air pressure sensor 50 becomes the calculated air pressure Pax.
The switching control of the supply / exhaust valve 46 is performed. Thus, wrinkle holding is performed with the wrinkle holding load Fso set as the mold information. The capacity of the air tank 44 is sufficiently large, and the change in the air pressure Pa caused by the change in the volume of the air cylinder 42 due to the lowering of the cushion pad 28 is almost negligible. It can also be calculated.

[0028]

Pax = (Fso + Wa + Wr + n · Wp) / Aa (2)

The hydraulic pressure P ₀ , P ₁ calculation block 138 is based on the machine information stored in the machine information memory 130 and the mold information stored in the mold information memory 132.
An initial hydraulic pressure for causing the wrinkle holding load Fso to substantially uniformly act on the wrinkle holding ring 30 via each cushion pin 24;
That is, the hydraulic pressure P ₀ in a state where the die 18 is not in contact with the wrinkle holding ring 30 is calculated from the relationship of the following equation (3), and each cushion pin is pressed during the press working in which the wrinkle holding ring 30 is pressed by the die 18. 24
Equally calculates the target hydraulic pressure P ₁ when the blank-holding force Fso is allowed to act on the relationship following equation (4). Then, the hydraulic pressure Ps adjusting block 140, first, the initial pressure of the pressure Ps detected by the hydraulic pressure sensor 38 so that the initial hydraulic pressure P _0, controls the pump 34 and the on-off valve 36. Thereby, at the time of press working in which the wrinkle holding ring 30 is pressed by the die 18, basically, the piston of each hydraulic cylinder 32 is pushed in by the average driving dimension Xav, and the wrinkle holding load Fso is increased via each cushion pin 24. Although almost be evenly act on pressure ring 30, the volume elastic coefficient K is such not necessarily constant by mixing such air, the initial oil pressure P ₀ is not necessarily accurate. For this reason, the hydraulic pressure Ps adjustment block 140
After adjusting s to the initial oil pressure P ₀ , the hydraulic pressure Ps at the time of press working is read when the test press is actually performed, and the initial oil pressure Ps is adjusted so that the oil pressure Ps substantially matches the target oil pressure P _1.
Correct ₀ . That is, when the hydraulic pressure Ps during pressing is higher than the target pressure P ₁ is not pressure ring 30 in a part of the cushion pin 24 abuts against the action biased is blank-holding force Fso to the rest of the cushion pins 24 for the case it is, cushion pins 2 by lowering the initial pressure P ₀
It is sufficient that the amount of run-in of 4 becomes large as a whole. Further, when the hydraulic pressure Ps during pressing is lower than the target hydraulic pressure P _1, when the piston portion of the hydraulic cylinder 32 is part of the blank-holding force Fso reached the stroke end is acting on the cushion pad 28 directly because it is, it may be increased initial pressure P ₀ so as not to reach up to the stroke end.
Note that this test press is performed in a state where the air pressure Pa is adjusted so as to obtain the wrinkle pressing load Fso.

[0030]

Xav = (Fso−n · As · P ₀ ) V / n ² · As ² · K (3) Fso + Wr + n · Wp = n · As · P ₁ (4)

The air pressure Pbx calculation block 142 calculates an air pressure Pbx for lifting the slide plate 20 and the die 18 with a force that balances them, based on the machine information and the die information, according to the following equation (5). The air pressure Pb adjustment block 144 controls the ON / OFF supply / exhaust valve 84 so that the air pressure Pb in the air tank 82 detected by the air pressure sensor 86 becomes the calculated air pressure Pbx.
Is switched. Thereby, the press working can be performed with each press load Fpoi set as the mold information without being affected by the weight of the slide plate 20 and the die 18. The capacity of the air tank 82 is sufficiently large, and the change in the air pressure Pb caused by the change in volume of the four air cylinders 80 due to the lowering of the slide plate 20 is almost negligible. The pressure Pbx can also be calculated.

[0032]

Pbx = (Wu + Ws) / Ab (5)

The relative height h adjusting block 146 is provided by the die height adjusting mechanism 5 in accordance with, for example, the flowchart of FIG.
2 is adjusted for the relative distance h. In step R1, and determine whether the data relating to the relative distance h ^* in the mold information memory 132 is included, executes the step R7 if any data regarding the relative distances h ^*, relative distance h
If there is no data regarding ^* , that is, if the mold is used by being attached to the press machine 10 of the present embodiment for the first time, step R2 is executed.

FIG. 12 is a flow chart for explaining the specific contents of step R2.
Then, the h-Fpi provisional characteristic and the press load Fpoi are read from the machine information memory 130 and the mold information memory 132, respectively. The reference value h ₀ that is the maximum value of the distance h is determined. This means that, for example, test hitting is performed while increasing the relative distance h from the minimum value by a predetermined constant amount, and the relative distance h when the load Foi becomes equal to or more than a predetermined value is obtained. In this state, the slide plate 20 may be lowered to the lower end (bottom dead center), and in this state, the relative distance h may be increased until the load Foi becomes equal to or more than a predetermined value. The operator can visually observe and set the contact state of the mold.

In step R2-3, the hF indicated by the dashed line in FIG. 10 set as the machine information is set.
pi obtains the relative distance h ₁ of press load Fpoi is obtained from the tentative characteristics (Fpi = a · h), the relative distance h is adjusted to h ₁ by the servo motor 60 to the reference value h ₀ as a reference.
In Step R2-4, the press machine 10 is
It is cycling, in step R2-5, a load Foi represented by the output signals of the strain gauges 61 at the falling edge and pressing load Fp _1. Preset h-Fpi temporary property, since rigidity than conventional mold is set with reference to the case high, generally pressing load Fp ₁ is smaller than the pressing load Fpoi. Next step in R2-6, change the relative distance h to a small relative distance h ₂ by changing the amount Δh predetermined from the relative distance h _1, step R2-7,
Measuring the pressing load Fp ₂ in the same manner as above with R2-8. Then, in step R2-9, based on the change amount Δh and pressing load Fp _1, Fp _2, obtains the h-Fpi present characteristics which are indicated by the solid line (Fpi = b · h) in FIG. 10, step R2 At -10, the relative distance hx at which the press load Fpoi is obtained is calculated from the h-Fpi characteristic, and the servo motor 60 controls the relative distance h to be hx. The adjustment of the relative distance h is performed independently for the four die height adjustment mechanisms 52 in the same manner as described above.

Returning to FIG. 11, in the next step R3,
With the relative distance h adjusted to hx as described above, the press machine 10 is operated for one cycle, and in step R4,
It is determined whether the difference | Foi−Fpoi | between the load Foi and the press load Fpoi represented by the output signal of the strain gauge 61 at the falling end at that time is smaller than a predetermined constant value α.
The constant value α is determined in consideration of a detection error, control accuracy, and the like, and the relative distance h is corrected in step R6 until the difference becomes smaller than α. Thus, regardless of the difference in the rigidity of each press machine 10, the press working can be performed favorably with each press load Fpoi set as the mold information. In step R5, the relative distance h represented by the output signal of the rotary encoder 59 is transmitted as the relative distance h ^* data from the transceiver 94 to the ID card 96 together with the machine number of the press machine 10,
The data is written into the press condition data memory 128 of the ID card 96. If the data of the relative distance h ^{* for} the press machine 10 already exists in the press working condition data memory 128, the content is rewritten as necessary.

On the other hand, if the judgment in the step R1 is YES, that is, if the press working has already been performed using the mold, the relative distance h ^* data and the press load Fpoi are set in the mold in step R7. The information is read from the information memory 132, and in step R8, the relative distance h is adjusted by the servomotor 60 to be h ^* . Then, the load Foi is changed to the press load F
Check if they substantially match the poi, and correct the relative distance h if necessary.

In addition to the above-described controls, the controller 90 also determines that the four loads Foi detected by the strain gauges 61 are overload prevention loads Foli (i = 1, 2, 3, 4). )
The air pressure Pc is controlled. That is, when the overload prevention load Foli acts on the overload prevention hydraulic cylinder 62 due to the presence of foreign matter or the like, the cylinder 6
6 retreats toward the air chamber 70 and the hydraulic cylinder 6
2 is allowed to flow into the oil chamber 68 and the pressure receiving area of the hydraulic cylinder 62 and the pressure receiving area of the oil chamber 68 and the air chamber 70 of the cylinder 66 are adjusted so that the slide plate 20 and the plunger 22 can approach each other. Air pressure P based on area
cx is set, and the air pressure Pc is equal to the air pressure Pcx.
The switching control of the ON / OFF supply / exhaust valve 74 is performed so that The pressure control of the air pressure Pc is performed independently for each of the four cylinders 66. As a result, damage to the press machine 10, the mold, and the like due to the excessive press load is prevented. The air pressure Pc can be set irrespective of the die to be used. Therefore, the air pressure Pc may be adjusted in advance by manual operation or the like.

Here, the press machine 10 of this embodiment is used.
, The rigidity of each press machine is determined based on the machine information unique to the press machine 10 stored in advance in the machine information memory 130 and the mold information unique to the mold read from the ID card 96 via the transceiver 94. Regardless of the difference in the sliding resistance etc. of each part, the press conditions under which the appropriate press working determined by the tri-press is performed, that is, the wrinkle holding load Fso and the press load Fpoi are reproduced.
Since the air pressures Pa and Pb, the hydraulic pressure Ps, and the relative distance h are automatically adjusted, troublesome adjustment work due to trial and error is eliminated, and the burden on the operator is greatly reduced, and excellent quality is achieved. Can be obtained stably.

When the die is mounted on the press machine 10 for the first time and the press working is performed, the relative distance h is determined based on the temporary characteristics of the h-Fpi and the press load Fpoi while performing the test driving. h is adjusted, the adjusted relative distance h is stored in the ID card 96 as relative distance h ^* data, and when the die is then mounted on the same press machine 10 to perform press working, Since the relative distance h is quickly adjusted using the relative distance h ^* data, the time required for the adjustment is reduced, and the operating rate of the press machine 10 is improved.

In this embodiment, steps R2 and R in FIG.
3, R4 and R6 are relative distances h as pressing conditions.
Is adjusted, step R5 is a storage step, and steps R7 and R8 are reproduction steps. In the series of signal processing by the controller 90, the above-described step R
The part executing steps R2, R3, R4 and R6 corresponds to the adjusting means, and the part executing steps R7 and R8 corresponds to the reproducing means. The transceiver 94 and the ID card 96 correspond to input means for inputting a press load Fpoi as mold information.
8 corresponds to a storage means.

As for the hydraulic pressure Ps, similarly to the relative distance h, the adjusted hydraulic pressure value Ps ^{* is applied} to the press machine 10.
May be stored in the ID card 96 in pairs with the machine number, and when the same mold is used again, the oil pressure Ps may be immediately adjusted to the oil pressure value Ps ^* . Air pressure Pa, Pb
Can be adjusted relatively easily in accordance with the above arithmetic expressions (2) and (5). However, such adjustment values may be stored in the ID card 96 as necessary, such as in the case of adjustment due to a tri-end error. No problem.

Next, another embodiment of the present invention will be described. Since the mechanical configuration of the press machine in the following embodiment is the same as that of the first embodiment, the description will be made using the same reference numerals.

A display operation panel 168 shown in FIG. 13 is used for setting the hydraulic pressure Ps of the pressure equalizing cushion device 51, and is connected to the controller 90 to transmit and receive signals. In this embodiment, the controller 9
0, a test hit switch signal indicating that the test hit switch of the press machine 10 has been turned ON, and a bottom dead center signal indicating that the slide plate 20 has reached a substantially lower end (bottom dead center or shortly before). Is to be supplied. Further, in the press working condition data memory 128 of the ID card 96, data on the equalizing initial oil pressure Ps ^* is stored together with the machine number of the press machine 10. The adjustment of the hydraulic pressure Ps is performed according to, for example, the flowchart of FIG. 14 according to a program stored in the controller 90 in advance.

In FIG. 14, in step S1, it is determined whether or not the changeover switch 172 of the display operation panel 168 has been selected and operated to "automatic" indicating automatic pressure equalization setting.
If "automatic" is selected, it is determined in step S2 whether the operation preparation push button 174 of the display operation panel 168 has been pressed. If the operation preparation push button 174 is not pushed, step S3 is executed, and it is determined whether or not the mold information memory 132 includes data on the equalizing initial oil pressure Ps ^* . Equalization initial pressure Ps
If data relating to ^* exists, step S5 is executed. If not, that is, if the mold is used for the first time in the press machine 10, step S1 and subsequent steps are repeated, and the operation preparation push button 174 is pushed in. Thereby, step S4 is executed.

Step S4 is specifically performed according to the flowchart of FIG. 15. First, in step S4-1, the air pressure Pa is adjusted so as to obtain the wrinkle pressing load Fso. This is because the initial oil pressure Ps, which is equalized, is
This is because the pressure varies depending on the air pressure Pa, that is, the wrinkle holding load Fs.
It is assumed that the air pressure Pa is adjusted so that so is obtained. The adjustment of the air pressure Pa may be performed by calculating the air pressure Pax in accordance with the equation (2). However, the press machine 10 is operated while changing the air pressure Pa, and the output signal of the strain gauge 61 is used. Wrinkle holding load F
s may be obtained, and the wrinkle holding load Fs may be adjusted so as to substantially match Fso. Also, the next step S
In 4-2, the equalizing initial oil pressure _Pn (n = 1 to 10) is set. Equalization initial oil pressure P _n is in the range from 20 kgf / cm ² to 200kgf / cm ² 20kgf / cm
It is stored in advance at ^two intervals, and is set in order from the high pressure side. Note that 1 kgf / cm ² is about 9.
It is 8 × 10 ⁴ Pa (Pascal).

In step S4-3, the initial oil pressure Ps at the time of non-press working is equalized to the equalized initial oil pressure _Pn set in step S4-2, that is, initially 200 kgf /
The pump 34 and the on-off valve 36 are controlled while reading the hydraulic signal from the hydraulic sensor 38 so that the pressure becomes ² cm ² .
When the hydraulic pressure Ps ≒ _Pn , the buzzer sounds in a predetermined pattern indicating the completion of the preparation in step S4-4, and it is determined in step S4-5 whether the test hit switch of the press machine 10 has been turned ON. When the operator who hears the buzzer turns on the test hit switch and supplies a test hit switch signal, the buzzer is stopped in step S4-6.
In the next step S4-7, pressure Ps when the press machine 10 by the ON operation of the test hitting the switch is brought into one cycle operation, i.e. stores reads the hydraulic pressure generated PX _n, on the display 176 of the display control panel 168 indicate. Since the change in hydraulic pressure during the press working involves vibration due to impact as shown in FIG. 16, in this embodiment, the hydraulic pressure Ps near the bottom dead center SL where the vibration is reduced, that is, the bottom dead center from the press machine 10 signal is to read the hydraulic pressure Ps represented by the oil pressure signal of the pressure sensor 38 when it is supplied as a hydraulic pressure generated PX _n. Note that another hydraulic pressure value such as a maximum value, a minimum value, or an average value of the hydraulic pressure Ps up to the bottom dead center SL may be used as the generated hydraulic pressure. The oil pressure Ps detected by the oil pressure sensor 38 is always displayed on the display 170 irrespective of whether or not press working is being performed.

In the next step S4-8, the change ΔPX between the current generated oil pressure PX _n and the previous generated oil pressure PX _n-1 is ΔPX =
| PX _n -PX _n-1 | is calculated, and in step S4-9, it is determined whether or not the amount of change ΔPX is equal to or less than a predetermined determination value β. The decision value beta, intended for regardless generating hydraulic pressure PX _n is equal to or substantially constant with a change in the pressure equalization initial oil pressure P _n, in consideration of variations or hydraulic detection error of the hydraulic pressure generated PX _n For example, a value of about 5 kgf / cm ² is set. Then, when the change amount ΔPX ≦ β,
After "1" and the flag F in step S4-10, in step S4-11, of provided 10 to the display control panel 168 for each pressure equalization initial oil pressure P _n equalizing圧初life hydraulic area display lamp 178 , The previous equalization initial oil pressure P
_Turn on the lamp corresponding to _n-1 . Also, the change amount ΔPX
> Β, the flag F is set in step S4-12.
= 1, and if F = 1, step S4--
After setting the flag F to "0" in step 13, the aforementioned step S4-1
Execute 1. In a succeeding step S4-14, it is determined whether or not the equalized initial oil pressure P _n = 20 kgf / cm ² , in other words, the generated oil pressure PX for all the equalized initial oil pressures P _n.
It is determined whether or not detection of _n has been completed, and P _n = 20 kgf
/ Cm ² and until, repeated execution of step S4-2 follows while changing the setting of the equalization initial oil pressure P _n. In the first cycle in which the equalizing initial oil pressure _Pn is 200 kgf / cm ² , steps S4-8 to S4-13 are omitted, and step S4-14 follows step S4-7.
Execute

[0049] Figure 17 shows the above step S4-2 by the following is repeated, a graph showing an example of the equalization initial oil pressure P _n detected generated hydraulic pressure PX _n for each, pressure equalization initial oil pressure P ₄ = Generated hydraulic pressure PX at 140 kgf / cm ²
₄ is 200 kgf / cm ² , equalizing initial oil pressure P ₅ = 12
A hydraulic pressure generated PX ₅ at the time of 0kgf / cm ² is 198kgf
/ Cm ² . Therefore, the equalizing initial oil pressure P ₅ = 12
In the case of 0 kgf / cm ² , the change amount ΔPX = | PX ₅
-PX ₄ | = 2 kgf / cm ² , the determination in step S4-9 is YES, and in step S4-11, the lamp of the previous equalization initial oil pressure P ₄ = 140 kgf / cm ² is turned on. Equalizing initial oil pressure P ₆ = 100 kgf / cm
^{2. In} the case of the equalizing initial oil pressure P ₇ = 80 kgf / cm ² , the determination in step S4-9 is similarly YES, and in step S4-11, the equalizing initial oil pressure P ₅ = 1.
20 kgf / cm ² , equalizing initial oil pressure P ₆ = 100 kg
Turn on the f / cm ² lamp. Equalizing initial oil pressure P ₈ =
In the case of 60 kgf / cm ² , the change amount ΔPX = | PX
₈₋ PX ₇ |> β, the determination in step S4-9 is NO, but since the flag F = 1 in the previous cycle, the determination in step S4-12 is YES, and step S4-12 is YES.
In 4-11, equalizing initial oil pressure P ₇ = 80 kgf / c
To turn on the m ² of the lamp. The equalizing initial oil pressure area display lamp 178 in FIG. 13 shows the lighting state (shaded lines) in this case.

Here, the lighting oil pressure region of the equalizing initial oil pressure region display lamp 178, in other words, the equalizing initial oil pressure P
All of the hydraulic cylinder C region regardless hydraulic pressure generated PX _n of variation ΔPX 17 in the area of small equalization initial oil pressure P _n to _n changes, the cushion pins 24 is involved in the arrangement has been blank-holding This means that the 32 pistons are in a neutral state during the press working. The hydraulic pressure range and interval of the equalizing initial oil pressure _Pn set in the step S4-2 are determined by the wrinkle holding load and the cushion pin 24 depending on the type of press working.
Is determined in advance in consideration of the number of hydraulic cylinders 32, the pressure receiving area, the piston stroke, the setting range of the wrinkle holding load, and the like so that the equalizing initial hydraulic pressure region can be determined irrespective of the difference in the number of used hydraulic cylinders.

For example, when the length of the cushion pin 24 has a large variation or the piston stroke of the hydraulic cylinder 32 is small, some hydraulic cylinders 32 are not operated and other hydraulic cylinders are not operated. In the case of the body thrust state, when the equalizing initial oil pressure region cannot be clearly distinguished or a plurality of equalizing initial oil pressure regions appear, for example, the equalizing initial oil pressure region does not appear, the equalizing cushion device 51 is used. The abnormality of the pressure equalizing cushion device 51 can be determined from the lighting state of the pressure equalizing initial oil pressure area display lamp 178. If the equalizing initial hydraulic pressure region display lamp 178 does not light up at all or the lamps light up separately, an abnormality display may be made. Further, when the changeover switch 172 is set to "each", the equalizing initial oil pressure _Pn can be arbitrarily set by manually operating the equalizing initial oil pressure setting dial 180. P
By confirming the display unit 176 the X _n, or can locate and examine the change in hydraulic pressure generated PX _n while finely changing the equalization initial oil pressure P _n, the average圧初life hydraulic area manually.

[0052] Further, in the pressure-equalizing initial oil pressure P _n is low region, variation ΔPX of generating hydraulic pressure PX _n to changes in oil pressure P _n is reduced due to air contamination, etc., the step S
The determination in 4-9 may be YES. In order to prevent this, for example, first, the determination in step S4-9 is YES
The generated oil pressure PX _n at the time of the occurrence is stored and compared with the generated oil pressure PX _n to determine the lighting of the lamp,
If the determination in step S4-9 is NO after the determination is YES, it is conceivable to immediately execute steps S4-15 and subsequent steps.

When the determination in step S4-14 is YES, step S4-15 is executed next to determine whether or not the flag F = 1. If the flag F = 1, in step S4-16, the current pressure equalization initial oil pressure P _n , that is, P ₁₀ = 20 kgf / cm in this embodiment.
The lamp ² is turned on, the flag F is set to "0" in step S4-17, and then step S4-18 is executed. If the flag F is 0, step S4-18 is followed by step S4-18. Execute. These steps correspond to the generated oil pressure PX when the equalizing initial oil pressure P ₉ = 40 kgf / cm ^2.
_9, when the change amount ΔPX the hydraulic pressure generated PX ₁₀ when the equalization initial oil pressure P ₁₀ = 20kgf / cm ² is less than determination value beta, for lighting the lamp equalization initial oil pressure P ₁₀ Things.

[0054] At step S4-18, the average value of the equalization initial oil pressure P _n of the lighting part of the equalizing圧初stage hydraulic area display lamp 178, sets the average value as equalizing圧初life hydraulic P _0. For example, in the case of the lighting state shown in FIG.
0 + 100 + 120 + 140) / 4 = 110 kgf / c
m ² is set as the equalizing initial oil pressure P ₀ . By controlling the pump 34 and the opening / closing valve 36 so that the initial oil pressure Ps at the time of non-press working becomes the equalized initial oil pressure P ₀ , all the hydraulic cylinders 32 involved in wrinkle holding are neutralized at the time of press working. The drawing process is performed in a state where the surface pressure distribution of the wrinkle retainer is kept substantially constant.

Returning to FIG. 14, the mold information memory 13
2 includes data on the equalizing initial oil pressure Ps ^* , that is, if press working has previously been performed using the same mold, step S5 is executed following step S3, and The data of the equalizing initial oil pressure Ps ^* is read from the type information memory 132. Then, in step S6, the pump 34 and the on-off valve 36 are controlled such that the oil pressure Ps matches the equalized initial oil pressure Ps ^* .

On the other hand, the display operation panel 168 is provided with a changeover switch 182 for communicating with the ID card 96, and performs writing and reading according to the flowchart of FIG. In step SS1, the changeover switch 182
It is determined whether or not "write" has been selected. If "write" has been selected, in step SS2, the display data on the display operation panel 168 is displayed on the press machine 1
ID card 9 transmitted from the transceiver 94 together with the
Write to 6. The display data for performing such writing is as follows.
This is the hydraulic pressure Ps displayed on the display 170 and the number of cushion pins 24 used on the display 184. After the pressure Ps is adjusted according to the flowchart of FIG. by being hydraulic displayed value at that time, i.e. substantially matching value and the average圧初life hydraulic P ₀ at pressure Ps at the time of non-pressing is uniform圧初life pressure Ps ^* as ID card 96 pressing condition data memory 128 Is written with the machine number. Also, the cushion pin 24 displayed on the display 184 is displayed.
When the number of used pieces is different from the used number n stored in the mold information memory 125, the data is rewritten. That is, since the equalizing initial oil pressure P ₀ obtained according to the flowchart of FIG. 15 differs depending on the number of used cushion pins 24, for example, when the used number is changed during actual press working, the ID card 96 is used. Needs to be rewritten as well. The display unit 184 displays the number of used units n stored in the ID card 96 as mold information.
Is displayed, the numerical value of which can be changed by the setting dial 186.
The contents stored in the card 96 are rewritten.

If the determination in step SS1 is NO, that is, if the changeover switch 182 has not been selected and operated to "write", step SS3 is subsequently executed, and the changeover switch 182 is selected to "read". It is determined whether or not an operation has been performed. If the operation of selecting “read” has been performed, step SS4 is executed,
The mold information is read from the ID card 96 via the ID card 4 and stored in the mold information memory 132, and the number n of used cushion pins is displayed on the display 184. In that case, if the pressing condition in the data memory 128 having the same device number as the press machine 10 Hitoshi圧初life hydraulic Ps ^* data is stored, the die information read also the average圧初life hydraulic Ps ^* Data It is stored in the memory 132.

[0058] In this embodiment, although obtaining the average圧初life hydraulic P ₀ according to the flowchart of FIG. 15, stored in the ID card 96 initial oil pressure Ps at that time as the average圧初life pressure Ps ^* in the case of the first time of the mold Accordingly, when the mold is next mounted on the same press machine 10 to perform the press working, the hydraulic pressure Ps is quickly adjusted using the equalized initial hydraulic pressure Ps ^* data, which is necessary for the adjustment. The time is shortened, and the operation rate of the press machine 10 is improved. In particular, when obtaining the average圧初life hydraulic P ₀ according to the flowchart of FIG. 15 in this embodiment, since the operator has to ON operating a test shot switch, operator's burden on the second and subsequent die replacement is significantly To be reduced.

In the flowchart of FIG. 15, the operator turns on the test hitting switch of the press machine 10, but when a safety fence or the like is provided around the press machine 10, the automatic operation is performed. It is also possible to set the equalizing initial oil pressure P ₀ fully automatically by operating the press machine 10.

This embodiment is one of the first and second aspects of the present invention.
In the embodiment, the step of executing step S4 of FIG. 14, that is , the steps of FIG. 15, is an adjusting step of adjusting the hydraulic pressure Ps as the press working condition,
SS2 is a storage step, and steps S5 and S6 in FIG. 14 are reproduction steps. Further, in the series of signal processing by the controller 90, the step of executing step S4 in FIG. 14, that is, each step of FIG. 15, corresponds to the adjusting unit, and the step of executing steps S5 and S6 corresponds to the reproducing unit. Transceiver 94, ID card 96, changeover switch 182
Is equivalent to input means for inputting a wrinkle pressing load Fso as mold information necessary for setting the air pressure Pa when adjusting the hydraulic pressure Ps, and the press working condition data memory 128 of the ID card 96 is equivalent to storage means. I do.

Display operation panel 190 shown in FIGS.
Are connected to the controller 90 to transmit and receive signals. In this embodiment, the press machine 10
Of the press stroke, in other words, a signal representing the slide height H is supplied to the controller 90 from a stroke sensor such as a position sensor that detects the position of the slide plate 20 or an encoder that detects the rotation angle of the crankshaft. The mold information memory 125 of the ID card 96
In the table, information on the thickness t of the press material is stored as mold information, and the press working condition data memory 128 stores the relative distance h ^* of the die height adjusting mechanism 52 ^.
Is stored together with the machine number of the press machine 10. Then, the die height adjusting mechanism 52
The adjustment of the relative distance h of FIG.
Is performed according to the flowchart of FIG. Note that this flowchart shows the operation by the operator together with the operation by the controller 90. In this embodiment, a case where the relative distance h between the four die height adjustment mechanisms 52 is uniformly adjusted by a single servomotor 60 will be described.

In step Q1, a die (12, 1) is operated by operating a switch provided on the operation panel of the press machine 10.
The bolster 14 on which (8, 30) is placed is moved into the press machine 10, and the bolster 14 is automatically positioned at a predetermined position in step Q2. At this point, the piston of the air cylinder 42 is held at the lower end by a hydraulic brake or the like. Then, at step Q3, the display operation panel 1
When the operator operates the 90 changeover switch 192 to the "individual" mode and the operator operates the changeover switch 194 to the "setup" mode in step Q4, the setup lamp 196 is turned on. After the operator presses the operation preparation push button 198 in step Q5, if the operator turns on the test hitting switch of the press machine 10 in step Q6, the press machine 10 is operated by jolting or the like. At step Q7, it is determined whether or not reached the set load F ₀ the total value Fp of the press load is predetermined output signal represents the strain gauge 61, Fp =
When becomes F _0, the descent of the slide plate 20 is stopped at step Q8. The set load F ₀ is, for example, a value of several tons to several tens tons so as not to overload the electric motor or the like of the press machine 10, and is stored in advance as machine information or the like. The automatic stop of the lowering of the slide plate 20 when Fp = F ₀ is caused by “setup”.
This is because the mode has been selected.

In the next step Q 9, the die 18 is fixed to the slide plate 20. The mounting of the die 18 is automatically performed by a die clamper or the like, but may be manually performed by an operator using a T-bolt or the like. In step Q10, the slide height H at this time is stored based on the signal from the stroke sensor, and in step Q11, the reverse switch of the press machine 10 is operated to raise the slide plate 20 by reverse rotation. Can be At step Q12, the stroke sensor or the like detects that the slide plate 20 has reached the top dead center, and the top dead center lamp 200 is turned on, whereby the operator stops the press machine 10.

Next, in step Q13, when the operator operates the changeover switch 194 to the "try" mode, the try lamp 202 is turned on. In step Q14, the dimensions ΔH to the bottom dead center obtained from the slide height H,
The change amount Δh of the relative distance h is calculated from the plate thickness t of the press material stored as the mold information and the predetermined additional drive-in amount x ₀ according to the following equation (6).
0 is driven to change the relative distance h by the change amount Δh. By reducing the dimension ΔH to the bottom dead center,
The press load Fp when the slide plate 20 is lowered to the bottom dead center is Fp = F ₀ , and by further reducing the plate thickness t, the bottom dead center press load Fp = F ₀ when a press material is supplied. That is, by changing the relative distance h by changing the amount Delta] h, thrust amount when lowering the slide plate 20 by introducing the pressed material to the bottom dead center, is becoming larger by substantially adding thrust quantity x _0. Additional thrust amount x _0, for example, a value of about 1.0mm is set.

[0065]

Δh = −ΔH−t + x ₀ (6)

In step Q15, the press material is put in. In step Q16, the operator turns on the test hitting switch to operate the press machine 10 for one cycle. Step Q
At 17, the press load Fp at the bottom dead center during the press operation is detected based on the output signal of the strain gauge 61,
The press load Fp and F _1. And step Q
At 18, the load values F ₀ and F ₁ and the additional drive-in amount x
_{From 0, the} load change ratio Δa is calculated according to the following equation (7). FIG. 24 shows load values F ₀ , F ₁ and additional run-in amount x _0.
And the load change ratio Δa corresponds to the slope of the graph. The graph of FIG. 24 corresponds to the h-Fpi characteristic in the first embodiment, and is unique to the press machine.

[0067]

Δa = (F ₁ −F ₀ ) / x ₀ (7)

In step Q19, the ID of the display operation panel 190
When the operator operates the communication switch 204 to the "ON" side and presses the reading push button 206 in step Q20, the mold information is read from the ID card 96 in step Q21. The read mold information is stored in the mold information memory 13.
2 and the display unit 2 of the display operation panel 190.
08 is displayed. The display unit 208 displays the press load Fpoi
210 that displays the total value Fpo of the wrinkle holding load F
display 212 for displaying so, display 214 for displaying the weight Wr of the wrinkle holding ring 30, display 216 for displaying the weight Wu of the upper die (die type 18), and the cushion pin 24
And a display 218 for displaying the number of used n.
The “slide load” of the display unit 208 corresponds to a press load, and the “cushion load” corresponds to a wrinkle holding load.

[0069] In step Q22, seeking forming load setpoint Ffo by subtracting the blank-holding force Fso from the total pressing load Fpo, in step Q23, calculated change amount x ₁ of the relative distance h according to the following equation (8) as well as, by driving the servo motor 60 to change the relative distance h by the change amount x _1. Thus, the relative distance h is equal to the change amount x
By changing by ₁ , the wrinkle holding air cylinder 42 is held at the descending end, that is, in the state of the wrinkle holding load Fs = 0, basically, as shown in FIG. Is the molding load set value Ffo.

[0070]

X ₁ = (Ffo−F ₁ ) / Δa (8)

In step Q24, the operator turns on the test hitting switch to operate the press machine 10 for only one cycle. In step Q25, the press load Fp at the bottom dead center during the press operation is output by the output signal of the strain gauge 61. and detects on the basis of the difference between the pressing load Fp and forming load set value Ffo | determines whether an error tolerance gamma ₁ is smaller than a predetermined | Fp-Ffo. | Fp-F
fo | when the ≧ gamma ₁ is, | Fp-Ffo | <changing the relative distance h in step Q26 until the gamma _1. Step Q
The determination of 25 may be made by the operator by looking at the value of the actual press load Fp displayed on the display 210, or the relative distance h may be corrected by operating the switch of the press machine 10 by a switch operation of the press machine 10. The operator may manually operate by operating 60. An actual relative distance h detected by the encoder 59 is displayed on a display 220 of the display unit 208.

In step Q27, the slide plate 20 is lowered by operating a switch provided on the operation panel of the press machine 10. In step Q28, the slide plate 20 is stopped when the slide plate 20 reaches the bottom dead center by the same switch operation. In step Q29, the air cylinder 4
In step Q30, the air pressure Pa is adjusted according to, for example, the formula (2) so as to obtain the wrinkle pressing load Fso. The weight Wr of the wrinkle holding ring 30 is generally less than 10 tons in press working of an automobile outer plate as compared with other members, and the air pressure Pa may be adjusted by ignoring this. The same applies to the first embodiment.

When the air pressure Pa is adjusted in step Q30, the press load Fp detected by the strain gauge 61 is increased by the wrinkle pressing load Fso.
31, the difference between the press load Fp and Fpo | Fp-Fpo |
It is equal to or error tolerance gamma ₂ is smaller than a predetermined. | Fp-Fpo | in the case of ≧ γ ₂ is, | Fp-
Fpo | <air pressure Pa is automatically adjusted at step Q30 until _{γ 2, | Fp-Fpo |} < becomes a gamma _2, normal lamp 224 is turned about the press load at step Q32. Thereafter, in step Q33, the ID communication switch 20
When the operator presses the write push button 226 in step Q34, the actual relative distance h displayed on the display 220 of the display unit 208 becomes h ^* data in step Q35. Together with the machine number of the press machine 10
The data is written to the D card 96. The press load Fp, which is the content displayed on the display 210, is also stored in the press condition data memory 128 together with the h ^* data.
Other display contents, for example, the number of used cushion pins of the display 218 and the equalizing oil pressure effective value of the display 228 are also written in the ID card 96 as in the second embodiment.
When setting the hydraulic pressure Ps, the same function as in the second embodiment is provided.

Next, a method of setting the relative distance h when the above-mentioned mold is removed from the press machine 10 and then mounted again on the press machine 10 to perform press working will be described.
This will be described with reference to the flowchart of FIG.

Steps W1 to W3 have the same contents as steps Q1 to Q3 in FIG. 22, and in the next step W4,
The changeover switch 194 is operated to the “try” mode. In step W5, the ID communication switch 204 is operated to the "ON" side, and in step W6, when the read push button 206 is pressed, in step W7, the mold information from the ID card 96 and the press of the same machine number as the press machine 10 are pressed. The processing condition data is read, and the content is displayed on each display of the display unit 208. In step W8, the servo motor 60 is operated so that the relative distance h matches the h ^* data. This is because the operator looks at the h ^* data displayed on the display 220 and the operator operates the switch of the press machine 10 to operate the servo motor 6.
0 may be operated, or may be automatically performed by the controller 90. Thus, the adjustment of the relative distance h is completed, and the same press working conditions as the previous time are reproduced.

In step W9, the slide plate 20 is lowered by inching or the like by operating the switch of the press machine 10, and
In step W10, the slide plate 20 is stopped at the bottom dead center by the switch operation. At this time, the press material has not been charged, but the thickness t of the press material is not more than 0.
Since it is about 6 to 0.7 mm, the slide plate 20
Is brought into contact with the die 18 and there is no risk of overloading the motor and the like. The stop position of the slide plate 20 does not necessarily have to be strictly at the bottom dead center. In step W11, the die 18 is fixed to the slide plate 20, and in step W12, the lock of the air cylinder 42 is released to raise the cushion pad 28, and the air pressure Pa is adjusted so as to obtain the wrinkle pressing load Fso. . These steps W11 and W12 are performed in the same manner as step Q9 and steps Q29 and Q30. Thereafter, in step W13, the slide plate 20 is raised to the top dead center. In step W14, a press material is charged. In step W15, the press machine 10 is operated for one cycle at a normal process speed. In step W16, the press load Fp and the wrinkle pressing load Fs at the time of press working are confirmed on the indicators 210 and 212, and the actual pressed product is visually observed. Fix it.

Also in this embodiment, in the case of the first mold, it is necessary to adjust the relative distance h according to the flowcharts of FIGS. 22 and 23, and the adjustment result is stored in the ID card 96 as h ^* data. By doing so, when the die is next mounted on the same press machine 10 for press working, the relative distance h is quickly adjusted using the h ^* data, so that the time required for the adjustment is reduced. As a result, the operating rate of the press machine 10 is improved, and the burden on the operator is greatly reduced.

Also in this embodiment, when adjusting the relative distance h, the operator needs to operate the press machine 10 by switch operation or perform various operations and operations. It is also possible to set the relative distance h fully automatically by operating the switch.

In the present embodiment, steps Q6 to Q26 are adjustment steps for adjusting the relative distance h as the press working conditions, steps Q33 to Q35 are storage steps, and step W
Steps 5 to W8 are reproduction steps. The press working condition data memory 128 of the ID card 96 corresponds to a storage unit.

[0080] Although the actual施例of the present invention have been described in detail with reference to the drawings, the present invention may be embodied in a different manner.

[0081]

[0082] For example, in the Examples, but the present invention has been described when applied to a single-action press machine 10 having pressure equalizing cushion device 51, a hydraulic cylinder is provided instead of d Ashirinda 42, the hydraulic The present invention can be applied to various press machines such as a single action press machine that applies a predetermined wrinkle holding load while relieving hydraulic oil in a cylinder .

In the above embodiment, the case where the relative distance h and the hydraulic pressure Ps are adjusted based on the press load Fpoi, the wrinkle pressing load Fso, and the like as the mold information has been described. Press working conditions such as relative distance h and hydraulic pressure Ps can be adjusted by trial and error.

In addition, the relative distances h,
The method of setting the press working conditions such as the hydraulic pressure Ps is merely an example, and the press working conditions can be set by another method.

In the above-described embodiment, the press processing conditions are stored in the ID card 96. However, when the types of the dies to be used are small, the dies are stored in the RAM or the like of the computer on the press machine side. The press working conditions may be stored in association with the type of the press machine, or a storage means may be provided separately from the press machine and the mold, and the press working conditions may be stored in a combination of a plurality of press machines and a mold. You may keep it. Other storage means, such as a floppy disk or magnetic tape, can also be used.

Although not specifically exemplified, the present invention can be embodied with various modifications and improvements based on the knowledge of those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to a claim of the second invention.

FIG. 2 is a configuration diagram showing an example of a single action type press machine to which the method and apparatus of the present invention are applied.

FIG. 3 is a configuration diagram showing the vicinity of a die height adjustment mechanism of the press machine in FIG. 2;

FIG. 4 is a block diagram illustrating a control system of the press machine in FIG. 2;

FIG. 5 is a block diagram illustrating functions of a controller in FIG. 4;

FIG. 6 is a functional block diagram of an ID card provided in association with a mold used by being attached to the press machine of FIG. 2;

FIG. 7 is a view showing a state where a load measuring device is arranged on the press machine of FIG. 2;

8 is a diagram showing an example of a load waveform obtained by the load measurement of FIG.

9 is a diagram showing a relationship between a wrinkle holding load Fsi obtained by the load measurement of FIG. 7 and an air pressure Pa.

10 is a diagram showing a relationship between a press load Fpi of the press machine of FIG. 2 and a relative distance h.

FIG. 11 is a flowchart specifically illustrating the function of a relative distance h adjustment block in FIG. 5;

FIG. 12 is a flowchart illustrating the contents of step R2 in FIG. 11;

13 is a diagram showing a display operation panel provided to the onset Ming embodiment.

FIG. 14 is a flowchart illustrating an operation when the hydraulic pressure Ps is adjusted in a press machine including the display operation panel in FIG.

FIG. 15 is a flowchart illustrating the contents of step S4 in FIG. 14;

16 is a diagram illustrating the detection position of the hydraulic pressure generated PX _n read in Step S4-7 in FIG. 15.

17 is a diagram showing an example of a generated oil pressure PX _n detected when setting the equalizing initial oil pressure P ₀ according to the flowchart of FIG. 15 in relation to the equalizing initial oil pressure P _n .

FIG. 18 is a flowchart illustrating an operation of exchanging data with an ID card in a press machine including the display operation panel in FIG.

[19] FIG 20 is a diagram showing a display operation panel provided in an alternative embodiment to the present invention in conjunction with FIG. 21.

20 is a diagram showing a display operation panel together with FIGS. 19 and 21. FIG.

FIG. 21 is a diagram showing a display operation panel together with FIGS. 19 and 20.

FIG. 22 is a flowchart illustrating a procedure for initially adjusting a relative distance h in a press machine including the display operation panel in FIGS. 19 to 21;

FIG. 23 is a view illustrating a continuation of the flowchart in FIG. 22;

FIG. 24 is a diagram illustrating the relationship between the amount of run-in and the press load Fp when adjusting the relative distance h according to FIGS. 22 and 23.

FIG. 25 is a flowchart illustrating a procedure for reproducing a relative distance h in a press machine provided with the display operation panel of FIGS. 19 to 21;

[Explanation of symbols]

10: Press machine 32: hydraulic cylinder 51: pressure equalizing cushion device 90: controller 94: a transceiver (input means) 96: ID card (input means) 128: pressing condition data memory (storage means) 1 82: change-over switch ( input means) P s: hydraulic (pressing condition) step S4: adjustment process step SS1, SS2: storing step step S5, S6: reproduction step step S4: adjusting means step S5, S6: reproduction means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B30B 15 / 02,15 / 26 B21D 24 / 14,37 / 14

Claims (2)

(57) [Claims] 1. A press machine in which a pair of removably mounted dies are moved close to and away from each other to perform press working, and a press machine capable of adjusting press working conditions affecting the press working is provided in accordance with a die to be used. A method of setting the press working conditions, the adjusting step of adjusting the press working conditions for each mold so that a proper pressed product is obtained using a press machine actually used for the press working; The press working conditions adjusted in the process,
A storage step of storing in a storage means in relation to the press machine and the mold, and the same mold adjusts press working conditions in the adjustment step.
And a reproducing step of reproducing the press working conditions stored in the storage means when arranged on the same press machine used to perform the pressing, and the press machine allows the pressure chambers to communicate with each other. A press machine which has a pressure equalizing cushion device for applying a wrinkle holding load substantially uniformly by a large number of hydraulic cylinders provided, wherein the press working condition is a hydraulic pressure of a hydraulic cylinder of the pressure equalizing cushion device. Press working condition setting method. 2. A press machine in which a pair of removably mounted dies are moved close to and away from each other to perform press working, and a press machine capable of adjusting press working conditions affecting the press working is provided in accordance with a die to be used. An apparatus for setting the press working conditions, comprising: input means for inputting mold information predetermined for each mold so that an appropriate pressed product is obtained; and mold information input by the input means. On the basis, adjusting means for adjusting the press working conditions so that a proper pressed product is obtained using a press machine used for actual press working, and the press working conditions adjusted by the adjusting means,
A storage means for storing in relation to the press machine and the mold, wherein the same mold adjusts the press working conditions in the adjusting step
And a reproducing means for reproducing the press working conditions stored in the storage means when arranged on the same press machine used for the press machine, and the press machine allows the pressure chambers to communicate with each other. A press machine which has a pressure equalizing cushion device for applying a wrinkle holding load substantially uniformly by a large number of hydraulic cylinders provided, wherein the press working condition is a hydraulic pressure of a hydraulic cylinder of the pressure equalizing cushion device. Press condition setting device.