JPS62134124A - Press machine for drawing - Google Patents

Abstract

PURPOSE:To prevent the generation of a wrinkle, to prevent the rupture on the way of a plastic deformation, and to obtain a product having a good quality, by changing optionally a wrinkle holding pressure at an optional position in a drawing process. CONSTITUTION:When a main pressure cylinder 2 of a press machine body side starts to descend, and simultaneously, a die cushion ring 7 descends, a material to be drawn contacts a lower die and drawing is started. A microprocessor CPU inputs a signal from a die cushion pad position sensor 19, and decides whether said position is a position for varying a wrinkle holding pressure or not. When it is decided to be a position for varying the holding pressure, a wrinkle holding pressure set value is read out, and a pressure value is converted to a driving signal corresponding to a driving quantity of a proportional electromagnetic pressure control value 25 and outputted to an amplifier. The amplifier conducts a driving current to the proportional electromagnetic pressure control valve 25, and supplies a necessary pressure oil to the die cushion cylinder 7. The microprocessor CPU inputs a signal from a pressure sensor 28, calculates an actual wrinkle holding pressure value, and displays an actual wrinkle holding pressure on a monitor.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a press for drawing a patterned molding material into an arbitrary shape. There is a J-Rub 'C related to a drawing press machine that can be changed.

(Prior art) Conventionally, when drawing and forming material into an arbitrary shape using a press machine, a constant flow of pressure oil is supplied to the main pressure cylinder and the slide is lowered at a constant speed. At the same time, the general method for drawing and forming format No. 11 was to supply pressurized oil to the die cushion cylinder to output a constant wrinkle presser pressure to maintain the wrinkle presser pressure at a constant level.

(Problems to be Solved by the Invention) In the conventional drawing control method described above, since drawing is carried out at a constant drawing speed and with a constant wrinkle pressing pressure, When drawing a molding material into a shape of N pieces, there is a problem that the material may break during plastic deformation or wrinkles may occur.

Therefore, in the present invention, the wrinkle pressing pressure in the forming process C or both the wrinkle pressing pressure and the drawing speed are arbitrarily changed according to the material, plate thickness, shape, etc. of the drawn product. The technical challenge is to solve problems.

(Means for solving the problem) The technical means for solving the above problem is as follows: An upper die that descends in conjunction with the slide driven by the main pressure cylinder, and a die cushion cylinder. The first step is to squeeze and mold the molded material supported by the wrinkle presser boulder that moves up and down in conjunction with the driven die cushion pad using the upper mold and the lower mold attached to the bolster.
The drawing press according to the invention includes a pressure setting section for setting a wrinkle presser pressure corresponding to an arbitrary movement position of the die cushion pad during the drawing process, and a wrinkle presser by the die cushion cylinder. Detecting the pressure and detecting the amount; a Tsuji calender that outputs a signal 3 corresponding to the mocha, a pressure nozzle that detects the die cushion pad position and outputs a signal corresponding to the detected pressure, and the die cushion pad. The die cushion pad position outputs a signal corresponding to the same detection position nid 7 at 1, and the die cushion pad position outputs a signal corresponding to the same detection position nid 7. The pressure control valve that supplies pressure oil to the die cushion cylinder is then set as described above. While applying the drive current corresponding to the wrinkle presser setting pressure, input the signal from the pressure regulator to set the presser pressure of 01, i￥! a main controller that converts the circumferential creasing presser pressure into a pressure monitor signal and outputs it, and a pressure monitor that inputs the pressure saw monitor signal output from the main controller and displays the actual creasing presser pressure on a monitor. It is to have 11゛4 formations with parts.

In addition, the slide driven by the main pressure cylinder
The embossed molding material, which is supported by a T-type that moves and descends, and a wrinkle presser holder that descends in conjunction with a die cushion pad driven by a guide cushion cylinder, is attached to the upper mold and the bolster ( A pressure setting unit for setting a wrinkle pressing pressure corresponding to an arbitrary movement position of the die press 1 button in the drawing process of the drawing press machine of the second invention that performs drawing and forming with a pressed stone mold. and,
a pressure sensor that detects the wrinkle pressing pressure of the die cushion cylinder and outputs a signal corresponding to the detected pressure; and a die cushion pad that detects the position of the die cushion pad and outputs a signal corresponding to the raised position. a position sensor, a speed setting section for setting a descending speed corresponding to an arbitrary movement position of the slide in the drawing process, and a slide position for detecting the movement position of the slide and outputting a signal corresponding to the detected position. The die cushion pad position is recognized by inputting the signal from the C series and the die cushion pad position C series, and the corresponding wrinkle presser setting is performed from the pressure setting section to the die cushion pad 1 knowledge position. After reading out the LF force, λ1 is applied to the pressure control valve 1 that supplies pressure oil to the cushion cylinder. Manually press the wrinkles with pressure 2
The same wrinkle presser pressure is converted into a pressure monitor signal and outputted, while the slide position is recognized manually by the signal from the slide position C series, and the slide recognition position is output from the speed setting section. After reading the set speed corresponding to the set speed, energizing the flow H1 regulating valve that supplies pressure oil to the main pressurizing cylinder with a drive current corresponding to the set speed,
A main control unit that calculates the descending speed of the slide, converts the calculated descending speed into a speed monitor signal, and outputs the same; and a main control unit that manually converts the pressure monitor signal outputted from the main control unit to calculate the actual wrinkle presser pressure.] and a speed monitor section that inputs the speed Iff ″f:monitor signal outputted from the main control unit and monitors and displays the descending speed of the sliding slide. It is to do so.

(Function) In the first invention having the above-mentioned configuration, before molding the anti-scratch molding material, the pressure setting section applies a wrinkle pressing pressure corresponding to the material, plate thickness, shape, etc. of the drawn product to the die cushion pad. Set for each arbitrary movement position. In the pressure setting section, after setting the force for each presser presser (JT) for each pad movement position irI indicated by -L, if you start another press operation E) +, the pressure above the slivis slide indicated by +'+ff will be F.
At the same time, the crease presser holder descends due to the lowering of the Daikutsu shim 1 cylinder, and the upper die presser holder and C
Molding starts from the moment when the supported patterned molding material comes into contact with the lower mold. The position is recognized and the same position 1u commands the wrinkle Mlλ pressure set by the pressure setting section?t
l-("If it is determined that there is, the wrinkle presser set pressure is read from the pressure setting section, and a drive current corresponding to the wrinkle presser set pressure is energized to the pressure control valve that supplies pressure oil to the Guicushion cylinder. The cushion cylinder receives the supply of pressure oil from the pressure horn control r and outputs the crease presser pressure equal to the crease presser set pressure.

At this time, the pressure calendarer detects the actual wrinkle pressing pressure output by the Guicushion cylinder and outputs a signal corresponding to the detected pressure to the main control section. The main control section inputs the presser presser pressure detection signal output from the pressure sensor 9, converts it into a pressure monitor signal, and outputs it to the pressure monitor section. Pressure monitor sections G and L manually input the pressure monitor signals to monitor and display the wrinkle pressing pressure.

As mentioned above, the main control section recognizes the die cushion pad position during the drawing process, and if it recognizes that the same recognition position "1 is the position where the presser set pressure of 1 is read from the pressure setting section," Read out the presser set pressure horn, crease presser set pressure scraps, energize the pressure control valve with a corresponding drive current of 0J to supply pressure oil to the die cushion cylinder, and output the crease presser pressure from the die cushion cylinder. Furthermore, the wrinkle presser pressure output from the die cushion cylinder is detected by a pressure sensor1, and the pressure detection signal from the same pressure sensor is converted into a pressure monitor signal, and the wrinkle presser pressure is displayed on the motor.3. Next, the second invention with the above configuration is a press that can arbitrarily change the drawing speed by q during the drawing process as well as the wrinkle pressing pressure control function centered on the main control section, When the forming of material 1 is started, the main control section inputs the signal from the slide position sensor () to recognize the slide position, and the recognized position is set at the slide lowering set speed set by the speed setting section. When it is recognized that it is the position to command, the constant speed specified in 1. is read from the speed setting section, a drive current corresponding to the set speed is applied to the flow rate regulating valve, and the main pressurizing cylinder is energized. Control is performed so that the descending speed of the slide reaches the set speed by supplying the required pressure oil.

As mentioned above, the main control section controls the wrinkle press JT force before the drawing process, and also controls the descending speed of the slide, that is, the drawing speed. This makes it possible to draw products with more complex shapes.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a front view showing the drawing press of this embodiment in a pre-forming state, and Fig. 2 is a front view of the drawing press in the post-forming state, and also shows the hydraulic circuit of the press. Nohiru.

As shown in FIGS. 1 and 2, the main body 10 of the press is equipped with a main pressure cylinder 2, and a slide 4 is attached to the lower end of a rod 3 of the cylinder. Roughly,
An upper die 6 is attached to the end of the slide 4F via an adabuku plate 5.

On the other hand, a die cushion cylinder 7 is attached to the lower part of the press body 1, and a die cushion pad 9 is attached to the end of the cylinder 7. Dikts Sea” Pin 10Δ
, 10 ['3 are attached 4), and a blank holder 1 is attached to the upper end of each Gui cushion pin IOA, 10B.
1 and 11B are installed.

When the respective cushion pins 10Δ and 10B are passed through the center of the bolt 1, they are supported by the frame 12.
On the first side of 3, a type 1/I is taken.

Lower die 1/11 die cushion pin IOA, 10B
through the blank holders 11Δ and 11B.
>>(Constructed so that both ends of 114 can be raised and lowered.

As shown in FIG. 1, the embossed molding material 15 is supported by the 1-mold 6 blank holders 11Δ and 111B and starts molding. A rack 4△ (= j For example, an analog signal output type encoder is provided as the slide position detection 317.
A rack 9Δ (=ttJ) is installed on the side surface of the die cushion pad 9, and when the die cushion pad 9 moves up and down, the rack 9A engages with the gear A718 and rotates. Anna 1 similar to
The die cushion pad position detector 1() is provided with a -'-'-''-''-''-''''-''-''''-'''-'' which outputs a gating signal.

A hydraulic circuit for supplying the required pressure oil to the main pressure cylinder 2 and the cylinder 7 is shown in FIG.

The oil J and E sources of this hydraulic circuit are the main pump 21 driven by the motor M, and the pressure oil output from the main pump 21 is used to switch the vertical direction of the main pressurizing cylinder 2. Main force f1 - cylinder shift lowering switching valve 22 and 11
Oil is supplied to the cushion cylinder elevation switching valve 23 for switching the elevation direction 7j of the cylinder 7 (a). Said main ship pressure cylinder ″f1 drop switching valve 2
2 and the main ship f [A proportional electromagnetic flow speed adjustment valve 24 is provided between the cylinder 2 and the main pressure cylinder 2 to control the F bulge speed when the main pressure cylinder 2 descends. Bypass circuit 2 for proportional electromagnetic pressure control valve 25 for controlling wrinkle presser pressure when generating pressure
6. Furthermore, a pressure gauge 27 for visually checking the pressure value of the die cushion cylinder 7 and a pressure sensor 28 for detecting the same pressure and outputting a signal corresponding to the detected pressure are attached.

Next, the control structure for the presser pressure control and the drawing speed control will be explained with reference to FIG. In addition, the control block 1'' indicated by a broken line in the figure is related to drawing speed control. Regarding the wrinkle presser pressure control, this embodiment is based on the first aspect of the present invention, and when the wrinkle presser λ pressure control and the drawing speed control are used together, the embodiment is based on the second aspect of the invention. Become.

As shown in the figure, a microprocessor CPU, for example, is used as the core of both of the above controls, and a microphone [Kobroset! J-CPU has random address memory RAM
and an input/output interface I10. to which the read-only memory I and OM are connected to satisfy the required storage capacity hk, and also have an input/output function to avoid inputting signals from the outside and to output signals to the outside. and an output interface OUT having an output function for outputting signals to the outside.

A press machine control device 31 that controls the drive of the press body 1 is connected to the input/output interface I10, and performs signal communication with the microb CPU. Signals outputted from the press machine control device 31 to the microphone CPU include, for example, a make-up signal to check whether the press machine has started operation, an abnormal signal, etc. Mike [Press from 1 Broretsusa CPU□
Control unit: Ready for operation as a signal output to a31 (+
For example, i + '3.

Further, the doujin output interface I10 includes a signal converter W5 32 that converts the signal inputted from the die cushion pad position sensor 19 into a digital signal, for example, and a signal converter W5 32 that converts the signal outputted from the die cushion pad position sensor 19 into a digital signal, and a digital signal after amplifying the signal outputted from the pressure roller 28. An amplifier 33 for converting the signal into a digital signal and a signal converter 34 for converting the signal output from the slide position switch 17 into a digital signal are connected.

An amplifier 35 for supplying a drive current for driving the proportional electromagnetic pressure control valve 25 and a drive current for driving the proportional electromagnetic flow; An energized amplifier 36 is connected.

Microbe! ” Sera VCPU has the input/output interfaces I10. Output interface OUT, random access RAM, read-only ROM
In addition to this, a pressure setting section 37 for setting a wrinkle pressing pressure corresponding to the movement position of the die cushion pad 9 and a speed setting section 38 for setting a slide lowering speed corresponding to the movement position of the slide 4 are connected. , and a bar type L E that displays the downward speed of the slide 4, such as a pressure monitor section 3'9, which displays the pressure detected by the pressure relief 28, e.g., by luminescent light.
A speed monitor unit 40 consisting of Dhl is connected.

The wrinkle presser pressure setting method in the pressure setting section 37 is as follows:
For example, by using the keyboard installed on the operation panel of the press, the die cushion pad position and the wrinkle pressing pressure value corresponding to the die cushion pad position are stored in the random access memory [<ΔM as shown in FIG. It is something that does. Further, the speed setting method in the speed setting section 38 uses the keyboard in the same way as the pressure setting method, as shown in FIG. The data is stored in the access memory 1RAM.

Next, the wrinkle presser pressure control action is performed according to the wrinkle presser pressure control flowchart 11- shown in FIG. 6, and the drawing speed control action is performed according to the drawing speed control flowchart 11- shown in FIG. -Explain according to the following.

In FIG. 6, the microbe 1]t? When the power is turned on to the CPU, step 1 shows that the electric control circuit including the CPU is turned on. Rise 11 Next, step 2 (please J3,
Microphone 11 Sec CP tJ i Determine whether or not the optimum wrinkle presser pressure is set according to the material, root thickness, shape, etc. of the drawn product. , - If it is judged that the setting has been completed (J3 is entered in step 3, the press machine control amount 3
It is determined whether the press main body 1 is ready for operation by signal communication with the press machine 1.

As a result of the judgment in step 3, Mike 1] Proretsuri CPU
indicates that the press machine 1 side is ready for operation.
Microbe [1 set C[)U outputs an operation signal to the breath control device 31 at startup 4 to indicate that wrinkle presser pressure control can be started. When the soil pressurizing cylinder 2 on the side of the press body 1 starts to descend and at the same time the pressure cylinder 7 descends F, the embossed molding material 15 comes into contact with the lower mold 14 and starts drawing. Mike 1] Zo I L! Tree CP U G, J3 in step 5 and the die cushion bad ranked 19th
It inputs a signal from the die cushion pad, recognizes the position of the die cushion pad, determines whether the same position is a position where the force of the wrinkle presser L is to be changed, and determines whether the same position is a position where the force of the wrinkle presser L is changed. If it is determined that position C is present, then in step 6, read out the wrinkle presser h setting value corresponding to the same position from the force setting section 37, f,] Pressure f + i'i
l. It is converted into a drive signal corresponding to the drive amount of the proportional electromagnetic pressure control valve 25 and output to the amplifier 35. l11j!
The 1 width switch 35 inputs the drive signal, energizes the proportional electromagnetic pressure control valve 25 with a drive current (), and supplies the die cushion cylinder 7 with the required pressure oil.

In the next step 7, Microb [Cosselli-0PU
inputs the signal from the pressure calender 28, performs recognition of the actual wrinkle presser pressure value (), converts it into a pressure 72 signal, outputs it to the pressure monitor section 39, and outputs the actual wrinkle presser pressure value. Avoid displaying the pressure on the monitor.Actually, since the crease presser pressure set point set by the pressure setting section 37 covers multiple points in the descending range of the die cushion pad 9, , is executed for each wrinkle presser pressure value setting point, and when the last wrinkle presser pressure setting is completed, the wrinkle presser pressure control for one recycle is completed as shown in step 8, and the operation is started. Let us assume that the signal is A'.

Next, the drawing speed control 9) will be explained according to the drawing speed control flowchart 1 of FIG.

Microphone 1] [Coseza CP When the °1rX source is input to the LJ, as shown in step 1'? j'J: UniMikeNichizorosse1Cl) The electric control circuit including U is initialized. Next, in Step 2, the Microphone 1 Cobra Retsher CPU sets the optimal creasing pressure according to the material, plate thickness, shape, etc. of the drawn product, and also sets the slide lowering speed using the speed setting section 38. If it is determined that both settings have been completed at the same time, go to step 3, J3, and set the press machine control system! d31 Which signal communication J: Determine whether the main body 1 of the ribless machine is ready for operation? I-ru.

As a result of the judgment in step 3, Mike [] Zorosetsuza CPU
When confirming that the operation of the press body 1 side has been completed, the processor CPU (Mike 1) is in step 4 (J3) and can start the wrinkle presser pressure control and drawing speed control for the press d control device 31. Indicates that a tl operation signal is output. The main pressure cylinder 2 and the die cushion cylinder 7 on the press body 1 side begin to descend, and the embossed forming material F3115 comes into contact with the lower die 1/I and starts drawing forming.

In the following, drawing speed control will be explained.

In step 5, the micro CPU inputs the signal from the slide position sensor 17 and determines whether there is a position C where the position of the slide 4 avoids changing the descending speed of the slide 4, that is, the drawing speed. If it is determined that the same position is a position where the slide descending speed is changed, step 6I: reads the slide descending speed corresponding to the same position from the speed setting section 38, and sets the slide descending signal. It converts into a drive signal corresponding to the drive amount of the proportional electromagnetic flow fit adjustment valve 2/I and outputs it to the amplifier 36.The amplifier 36 inputs the drive signal and supplies a drive current to the proportional electromagnetic flow adjustment valve 21. Turn on the power and supply the required pressure oil to the main pressurizing cylinder 2.

Next, in step 7, the microphone coprocessor CPU inputs the output signal of the slide position Renly 17, calculates the descending speed of the slide 4 from the time required to descend a predetermined distance, and converts the calculated descending speed into a speed monitor signal. After conversion, it is output to the speed monitor section 40, and the slide descending speed is displayed on the monitor.

In reality, the slide descending speed setting points set by the speed setting section 38 span multiple points in the descending range of the slide 4, so the routine from step 5 to step 1 is executed for each slide descending speed setting point. , when the drawing speed control corresponding to the last slide lowering speed setting point is completed, the drawing speed control of 11 nite is completed as shown in step 8, and the operation signal is turned off.

As described above, the wrinkle presser pressure control and the drawing speed control are performed in accordance with the J3 wrinkle presser pressure set value to move the die cushion pad 9 to any movement position set by the pressure setting section 37. control is carried out, and
Draw forming speed control is performed t) in accordance with the set speed of the slide F at any moving position of the slide 4 set by the speed setting section 38. Therefore, in the embodiment corresponding to the first invention, only tL creasing pressure is performed, and in the embodiment corresponding to the second invention, creasing pressure control and drawing speed control are performed in J3C. It is done by In the latter embodiment, generally, by controlling the crease presser pressure as the main control and controlling the drawing speed as a secondary,
Is it difficult to perform high-quality drawing with wrinkle presser pressure control? ! This makes it possible to mold even products with irregular shapes.

(Effects of the Invention) As described above, in the first invention of the present invention, the wrinkle pressing pressure λ can be changed at any position r in the drawing process, and in the second invention, the wrinkle pressing pressure λ can be arbitrarily changed in the drawing process. Since the wrinkle pressing pressure and drawing speed can be changed arbitrarily, even when drawing a complex shape by 1 degree, wrinkles will not occur and breakage during plastic deformation will be prevented. This has the effect of making it possible to draw and form products of good quality.

[Brief explanation of drawings]

Figures 1 and 2 are a front view and hydraulic circuit diagram of a press machine according to an embodiment of the present invention, Figure 3 is a control block diagram of an embodiment of the present invention, and Figures 4 and 5 are wrinkle press pressure Setting explanatory diagrams showing setting examples and drawing speed setting examples, FIG. 6 is a flow diagram of wrinkle presser pressure control, and FIG. 7 is a flow diagram of drawing speed control. 1...Press machine main body 2...Main pressure cylinder 4...Slur r drawer...Upper mold 7...Die cushion cylinder 9...Die cut shim 1 butt 10A, 10B...Die cushion pin 11Δ, 11
B...Zoranc boulder 13...Bolster 1/I...Lower mold 15...Flashing molding material 17...Slide position head sensor 19...Die cushion pad position sensor 21...
Main pump 22...Main pressurizing cylinder elevation switching valve 23...Dai cylinder 31 cylinder status? Down switching valve 24... Proportional electromagnetic flow rate adjustment valve 25... Proportional electromagnetic pressure control valve 28... Pressure sensor 7... Pressure setting section 38... Three speed setting sections... Pressure monitor Section 40...speed monitor section

Claims (2)

[Claims] (1) Overprint molding supported by an upper die that moves up and down in conjunction with a slide driven by a main pressure cylinder, and a wrinkle presser holder that moves up and down in conjunction with a die cushion pad that is driven by a die cushion cylinder. A press machine that squeezes and shapes a material between the upper mold and a lower mold attached to a bolster, the pressure for setting a wrinkle pressing pressure corresponding to an arbitrary movement position of the die cushion pad in the drawing process. a setting unit, a pressure sensor that detects the wrinkle pressing pressure by the die cushion cylinder and outputs a signal corresponding to the detected pressure, and a pressure sensor that detects the die cushion pad position and outputs a signal corresponding to the detected pressure. a sensor, a die cushion pad position sensor that detects the die cushion pad position and outputs a signal corresponding to the detected position; and a die cushion pad position sensor that inputs a signal from the die cushion pad position sensor to recognize the die cushion pad position; A wrinkle presser set pressure corresponding to the die cushion pad recognition position is read from the pressure setting section, and a drive current corresponding to the wrinkle presser set pressure is energized to a pressure control valve that supplies pressure oil to the die cushion cylinder. On the other hand, a main control unit inputs a signal from the pressure sensor to recognize the crease presser pressure, converts the crease presser pressure into a pressure monitor signal and outputs it, and the pressure monitor outputted from the main control unit. A press machine for drawing and forming, characterized by comprising a pressure monitor unit that inputs a signal and monitors and displays the actual crimp pressure. (2) Overprint molding supported by an upper die that moves up and down in conjunction with a slide driven by a main pressure cylinder, and a wrinkle presser holder that moves up and down in conjunction with a die cushion pad that is driven by a die cushion cylinder. A press machine that squeezes and shapes a material between the upper mold and a lower mold attached to a bolster, the pressure for setting a wrinkle pressing pressure corresponding to an arbitrary movement position of the die cushion pad in the drawing process. a setting unit, a pressure sensor that detects the wrinkle pressing pressure by the die cushion cylinder and outputs a signal corresponding to the detected pressure, and a die that detects the die cushion pad position and outputs a signal corresponding to the detected position. a cushion pad position sensor; a speed setting unit that sets a descending speed corresponding to an arbitrary moving position of the slide during the drawing process; and a slide that detects the moving position of the slide and outputs a signal corresponding to the detected position. inputting signals from a position sensor and the die cushion pad position sensor to recognize the die cushion pad position;
A wrinkle presser set pressure corresponding to the die cushion pad recognition position is read from the pressure setting section, and a drive current corresponding to the wrinkle presser set pressure is applied to a pressure control valve that supplies pressure oil to the die cushion cylinder. At the same time, a signal from the pressure sensor is inputted to recognize the crease presser pressure, and the crease presser pressure is converted to a pressure monitor signal and outputted, while a signal from the slide position sensor is inputted to recognize the slide position. Then, a set speed corresponding to the slide recognition position is read from the speed setting section, and a drive current corresponding to the set speed is applied to a flow rate regulating valve that supplies pressure oil to the main pressurizing cylinder. A main control section that calculates the descending speed of the slide, converts the calculated descending speed into a speed monitor signal and outputs it, and inputs the pressure monitor signal output from the main control section to monitor and display the actual crimp presser pressure. and a speed monitor section that inputs the speed monitor signal output from the main control section and monitors and displays the actual descending speed of the slide.