JP2000190094A - Multi-drive oil hydraulic press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a plurality of plastic processing with outer and inner slides by installing outer and inner side driving cylinders respectively between a crown part of a frame and, outer and inner slides, and installing outer and inner slide position detectors between the frame and the outer slide and between both slides respectively. SOLUTION: A position detector 14 intervenes between a column 2 and an outer slide 4, so as to detect position (height) of the outer slide 4. An inner slide 5 is built in the outer slide 4, and the inner slide 5 is elevatably guided by a guide device installed to the outer slide 4. A position detector 25 intervenes between the outer slide 4 and the inner slide 5, so as to detect position of the inner slide 5 relative to the outer slide 4. Outer slide driving cylinders 7, 8 and an inner slide driving cylinder 9 are fixed to a crown 1, whereby various plastic processings can be done at the identical position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus capable of performing plastic working in several steps at the same place. More specifically, the present invention relates to a double-acting hydraulic press for driving a mold capable of performing several processes. Outer panels constituting a part of the body of an automobile can be mentioned as the products to be processed, and each of the drawing, piercing and trimming can be mentioned as the plastic working.

[0002]

2. Description of the Related Art Conventionally, in the above-described drawing, piercing, and trimming processes of a product, a mold for each process is prepared.
These were arranged in order and plastic working was performed while the material was conveyed by a conveying device.

[0003]

Therefore, there have been problems such as the necessity of a transfer device, the necessity of positioning the material for each die in each process, and the large installation area of the machine. The present invention has been made to solve these problems. That is, a first object of the present invention is to perform a plurality of plastic workings at the same place using an outer slide and an inner slide, and a second object is to rapidly lower the outer slide and the inner slide to shorten the cycle time. The third purpose is to further reduce the cycle time, the fourth purpose is to prevent breakthrough caused by punching, and the fifth purpose is to prevent the inclination of the outer slide and the inner slide. The sixth object is mainly to prevent the inner slide from tilting.

[0004]

According to the present invention, there is provided an apparatus capable of performing a plurality of plastic workings at the same position without transferring a material. That is, a double-acting hydraulic press for driving a mold capable of performing a plurality of plastic workings is provided.
Further, the apparatus which can achieve this object has a configuration as simple as possible, and at the same time, a configuration capable of improving the processing accuracy. That is, the invention of claim 1 has a configuration in which a plurality of plastic workings can be performed using the outer slide and the inner slide, and the invention of claim 2 rapidly lowers and raises the outer slide and the inner slide together by the inner slide drive cylinder. The invention according to claim 3 is configured to drive the inner slide drive cylinder using a plurality of pumps, the invention according to claim 4 is provided with a cylinder for braking the movement of the inner slide, and the fifth invention is related to The rack and pinion mechanism is used to prevent inclination of the outer slide and the inner slide. According to the invention of claim 6, the inner slide is guided by the guide provided on the outer slide and the inner slide drive cylinder.

[0005]

1, 2 and 3, a crown 1, a column 2 and a bed 3 are fastened and integrated by tie rods (not shown) to form a press frame.

The outer slide 4 is guided by the column 2 so as to be able to move up and down. As the guide device interposed between the column 2 and the outer slide 4, a conventional guide device is used. A position detector 14 is interposed between the column 2 and the outer slide 4. The position detector 14 detects the position (height) of the outer slide 4, and a commercially available so-called linear scale is used.

[0007] Inside the outer slide 4, the inner slide 5
Is incorporated, and the inner slide 5 is
Are guided so as to be able to move up and down freely. A position detector 25 is interposed between the outer slide 4 and the inner slide 5. This position detector 25 is
The position of the inner slide 5 with respect to the outer slide 4 is detected, and a commercially available so-called linear scale is used. The absolute position of the inner slide 5 is determined by the position detector 2
5 and the output of the position detector 14.

An outer slide drive cylinder 7 and an inner slide drive cylinder 9 are fixed to the crown 1, and the respective piston rods are connected to the inner slide 5 and the outer slide 4.

An inner slide drive cylinder 9 is located at the center, and outer slide drive cylinders 7 and 8 are located on both sides of the center, and these are arranged in a straight line.

In FIG. 1, a base 23 is fixed to an upper portion of the outer slide 4. A slide connection device 22 is interposed between the base 23 and the piston rod of the inner slide drive cylinder 9. The slide connection device 22 temporarily fixes the piston rod of the inner slide drive cylinder 9 to the outer slide 4 via the base 23. That is, the slide connecting device 22
Is operated, the inner slide 5 and the outer slide 4 can be integrally and simultaneously driven up and down by the inner slide drive cylinder 9. Of course, if this slide connection device 22 is released, the inner slide drive cylinder 9
Thus, only the inner slide 5 can be driven up and down. The slide connecting device 22 is operated by a spring force and is released by pressurized oil. The slide connecting device 22 itself uses a commercially available product.

1, 3 and 4, a double-acting cylinder 24 is interposed between the inner slide 5 and the outer slide 4. The cylinder of the double acting cylinder 24 is fixed to the outer slide 4, and the piston rod of the double acting cylinder 24 is connected to the inner slide 5. The double-acting cylinder 24 regulates the lowering operation of the inner slide 5. That is, when a punching die is attached to the inner slide 5 and punching is performed, it can be used to prevent a so-called breakthrough caused by the punching. As shown in FIG. 3, four double-acting cylinders 24 are provided.

As shown in FIGS. 1 and 2, a plurality of transmission pins 20 are fixed to the lower surface of the inner slide 5. Corresponding to this, a mold push pin 21 is provided on the bottom plate portion of the outer slide 4 so as to be able to move up and down. The mold push pin 21 has a flange on the head. On the other hand, a hole for inserting the mold push pin 21 is provided in the bottom plate portion, and the upper portion of the hole has a large diameter and forms a holding portion for the coil spring. A coil spring is interposed between the coil spring holding portion and the flange, and the mold push pin 21 is held so as to be able to move up and down. The mold push pin 21
The mold attached to the inner slide 5 is driven.

1 and 2, a bolster 6 is provided on the bed 3, and a lower mold (lower mold) is opposed to an upper mold (upper mold) attached to the outer slide 4 and the inner slide 5. Is attached. Material is supplied between the upper mold and the lower mold, and the outer slide drive cylinder 7,
The plastic working is performed by the operation of the 8 inner slide drive cylinder 9 and the like.

In FIG. 4, a hydraulic circuit including a pump 1, a pump 2, and a pump 3 is connected to an outer slide drive cylinder 7, an inner slide drive cylinder 9, and an outer slide drive cylinder 8. The hydraulic circuit to the outer slide drive cylinder 7, the inner slide drive cylinder 9, and the outer slide drive cylinder 8 includes a switching valve A
1. The switching valve C1 and the switching valve B1 are incorporated. The circuit from each pump to these switching valves is a switching valve A2,
They are connected via a switching valve B2.

Here, the operation of the actual plastic working will be described. Upper and lower molds are respectively attached to the outer slide 4, the inner slide 5, and the bolster 6, and a material is supplied between the upper and lower molds.

When the slide connection device 22 is operated, that is, the pressure oil supplied to the slide connection device is released, and the outer slide 4 is fixed to the piston rod of the inner slide drive cylinder 9, the inner slide drive cylinder 9 Lower the piston rod.

In this case, the switching valve A1 and the switching valve B1 are closed, and the switching valve A2 and the switching valve B2 are opened to supply all the hydraulic oil of the pump 1, the pump 2 and the pump 3 to the inner slide drive cylinder 9, and The slide 4 and the inner slide 5 are rapidly lowered together.

The position of the outer slide 4 is determined by a position detector 14.
The outer cylinder 4 is lowered when the desired position is reached, and drawing is performed. In this case, the switching valve A
2. The switching valve B2 is closed, and the outer slide drive cylinders 7, 8 are driven by the pump 1 and the pump 2, respectively.

When the outer slide 4 is lowered to a desired position and the drawing is completed, the slide connecting device 22 is released, and only the inner slide 5 is lowered to perform punching. Immediately before the end of the punching operation, the double-acting cylinder 24 is operated (to narrow the waste oil circuit) to brake the inner slide 5 to prevent breakthrough. The mold assembled to the inner slide 5 is pressed by the transmission pin 20 and the mold push pin 21 to operate.

When the plastic working is completed, the inner slide 5 is returned to the original position before the punching, and the slide connecting device 22 is operated.
The outer slide 4 and the inner slide 5 are quickly raised together with the outer cylinder 4 being fixed to the piston rod of FIG. Also in this case, the pressure oil of the pump 1, the pump 2 and the pump 3 is supplied to the inner slide drive cylinder 9 as in the case of the rapid descent. Hereinafter, the above series of operations is repeated.

FIGS. 5 and 6 show another embodiment. A rack and pinion mechanism is employed to mechanically synchronize the left and right vertical movements of the inner slide 5. Other configurations are the same as those of the above-described embodiment.

In FIG. 1, a bearing 1 is mounted on an outer slide 4.
The bearing 15 is provided with an eco-rise shaft 18.
Are rotatably supported. Pinions 16 are fixed to both ends of the ecorise shaft 18, and a rack 17 that meshes with the pinions 16 is fixed to the column 2 vertically.

When the outer slide 4 moves up and down, the pinions 16 located on the left and right of the outer slide 4
And the outer slide 4 does not tilt with respect to the column 2 because the outer slide 4 moves up and down by the same amount.

Similarly, the bearing 26 is attached to the inner slide 5.
Are provided, and an eco-rise shaft 29 is rotatably supported by the bearing 26. Pinions 27 are fixed to both ends of the eco-rise shaft 29, and a rack 28 that meshes with the pinions 27 is fixed to the outer slide 4 in a vertical direction.

The inner slide 5 does not tilt with respect to the outer slide 4 by the action of the rack 28 and the pinion 27.

FIG. 7 shows an embodiment for controlling the double-acting cylinder 24 by using the control valve 13 to improve the positional accuracy of the inner slide 5 and the product accuracy. Is not different from the above-described embodiment of the hydraulic circuit.

[0027]

According to the present invention, various plastic workings can be performed at the same position, so that the equipment area is small, rapid lowering and rapid ascending can be performed, so that high speed can be achieved, and outer and inner slides can be tilted. Can be prevented, which is advantageous for an eccentric load.

[Brief description of the drawings]

FIG. 1 is a front view of a partial cross section.

FIG. 2 is a left side view.

FIG. 3 is a central cross-sectional view of FIG. 1;

FIG. 4 is a hydraulic circuit diagram

FIG. 5 is a central cross-sectional view of another embodiment.

FIG. 6 is a left side view of another embodiment.

FIG. 7 is a hydraulic circuit diagram of another embodiment.

[Explanation of symbols]

1 is a crown, 2 is a column, 3 is a bed, 4 is an outer slide, 5 is an inner slide, 6 is a bolster, 7 is an outer slide drive cylinder, 8 is an outer slide drive cylinder, 9 is an inner slide drive cylinder, and 10 is a pump. 1, 11 is a pump 2, 12 is a pump 3, 13 is a control valve,
14 is a position detector, 15 is a bearing, 16 is a pinion, 17
Is a rack, 18 is an eco-rise shaft, 19 is a braking device, 20
Is a transmission pin, 21 is a mold push pin, 22 is a slide connection device, 23 is a base, 24 is a double-acting cylinder, 25 is a position detector, 26 is a bearing, 27 is a pinion, 28 is a rack, and 29 is an ecorise shaft. is there.

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 4E088 AA01 AB02 AB04 CA10 EA05 EA06 4E089 EA01 EA02 EB01 EB02 ED03 EE04 4E090 AA01 AA02 AB01 BA01 BB06 EB06

Claims (6)

[Claims] An outer slide drive cylinder and an inner slide drive cylinder are interposed between a crown portion of a frame and an outer slide and an inner slide, respectively, and a position of the outer slide is defined between the frame and the outer slide. An outer slide position detector for detecting the position of the inner slide with respect to the outer slide is provided between the outer slide and the inner slide. press. 2. An outer slide drive cylinder and an inner slide drive cylinder are provided in a crown portion of a frame, and a piston rod of the cylinder is connected to the outer slide and the inner slide, respectively. A slide connecting device for temporarily integrating the piston slide of the inner slide drive cylinder and the outer slide is interposed between the outer slide and the outer slide, and the outer slide is provided between the frame and the outer slide. An outer slide position detector for detecting a position is interposed, and an inner slide position detector for detecting a position of the inner slide relative to the outer slide is provided between the outer slide and the inner slide. Double acting hydraulic press. 3. A pump for supplying pressure oil to the outer slide drive cylinder and the inner slide drive cylinder, respectively, and the pressure oil of both pumps is supplied to the inner slide drive cylinder, so that the outer slide and the inner slide drive cylinder are provided. 3. The double-acting hydraulic press according to claim 2, wherein the inner slide is rapidly lowered and raised together. 4. A double-acting cylinder interposed between the outer slide and the inner slide for braking a descending movement of the inner slide.
Double acting hydraulic press as described. 5. A tuning device using a rack and pinion mechanism and an ecorise shaft is interposed between the frame and the outer slide and between the outer slide and the inner slide. The double-acting hydraulic press according to claim 2, 3, or 4. 6. An outer slide drive cylinder and an inner slide drive cylinder are provided on a crown portion of a frame, a piston rod of the outer slide drive cylinder is connected to an outer slide, and the inner slide drive cylinder is connected to an inner slide. The outer slide is guided by the frame to be movable up and down, and the inner slide is guided to be movable up and down by the outer slide, so that the inner slide is guided by the outer slide and the inner slide drive cylinder. A double-acting hydraulic press characterized by a structure that prevents inclination of the inner slide.