JPH0824962A - Press piercer and method for boring drawn product using it - Google Patents

Abstract

PURPOSE:To enable the formation of plural holes in a drawn product having composite shape in order by positioning a material to be worked after retracting die holding devices placed at a position interfering with the material to be worked and then executing pressing work. CONSTITUTION:Plural die holding devices 5A, 5B, 5C, 5D, 5E each incorporating one pair of upper and lower dies are mounted on a press machine body 1. At the time of boring a hole H1 in the material W to be worked by the die of the die holding device 5B, the other die holding devices 5A, 5C, 5D, 5E are withdrawn to the positions not interfering with the material W to be worked by driving respective cylinders 7 and the die holding device 5B is positioned below a hammer. After positioning the material W to be worked, boring is executed to make the hole H1. At this time, the die holding device 5A does not interfere with the standing wall SW1 of sink part S in the material W to be worked. By this method, even at the time of boring holes having different sizes, there is no need to exchange the existent dies with other dies and plural holes can be helded in order.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press punching device suitable for punching a hole such as a round hole or an oval hole at the upper position of a drawn product having a complicated shape such as a sink. The present invention also relates to a method for punching a drawn product using this device.

[0002]

2. Description of the Related Art When punching a drawn product having a complicated shape such as a sink with a press, conventionally, in order to avoid interference with the drawn part, a special die is attached to a press machine. It was based on the method of drilling in one step of the press.

However, in the above-mentioned conventional method, since the mold has to be replaced every time the size of the hole is different, the work is troublesome or there are a plurality of holes to be formed. , Even if the shape of the drawn product is the same, even if the difference is only the pitch of the holes is changed, it is possible to manufacture a special mold to avoid interference with the drawn part or to attach it to the press machine. The problem is that the molds have to be changed.

This not only leads to an increase in mold cost due to an increase in the number of molds, but also restricts the design, which increases the time and effort required to replace the molds even in the drilling work. In addition, it was forced to put a heavy burden on the rational production of many designs when and when needed.

Therefore, the die can automatically accommodate a large number of hole sizes, the die does not need to be replaced even if the hole pitch changes, and the die has a complicated shape. With regard to the structure, a press punching device and a punching method have been developed that are capable of processing a round hole or an oblong hole at the upper position by pressing, even if the draw-formed part causes interference with the die. Therefore, it is considered to be extremely useful.

[0006]

DISCLOSURE OF THE INVENTION In view of the above-mentioned conventional techniques, the present invention is capable of automatically responding to a large number of hole sizes in a press machine and exchanging the mold even if the hole pitch changes. Provided is a device capable of forming a hole such as a round hole or an oval hole at an upper position of a drawn product having a complicated shape, and a method for punching a drawn product using this device. Is the task.

[0007]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems, and the structure of the device is such that a pair of an upper mold and a lower mold are accommodated in a press machine body in parallel. A plurality of mold holding devices, a positioning device of the mold holding device for moving and positioning the individual mold holding devices to a desired position, and an upper mold of each of the mold holding devices for holding a workpiece. And a moving and positioning device for a work piece for positioning with respect to a desired pair of lower molds, and a driving device for a hammer that presses each upper die for press working on the work material. It is a feature.

Further, in the construction of the method for punching a draw-formed product using the above apparatus, at the time of positioning the draw-formed product which is the workpiece, at least one of the upper and lower molds or the mold holding device is draw-formed. If it is in a position that interferes with the product, the mold holding device is retracted to a position that does not interfere with the drawn product, and when the drawing product is positioned and the upper die is pressed to perform press forming When the upper and lower molds for processing the product are in the retracted position, the positioning device of the mold holding device is controlled so that the mold holding device is moved and positioned under the hammer, and press working is performed. It is characterized by that.

[0009]

Since the device of the present invention is configured as described above, when a workpiece having a complicated shape such as a sink is to be drilled, it is positioned with respect to the die for drilling the workpiece. When at least one of the upper and lower molds or the mold holding device is in a position where it interferes with the work piece, the work piece is positioned by retracting the mold holding device to a position where it does not interfere with the work piece. When the upper mold is pressed and the upper mold is pressed and the upper and lower molds are in the retracted position, the mold holding device is moved to the lower position of the hammer for positioning. By controlling the positioning device of the die holding device so that it is possible to perform press working such as a round hole or an oblong hole at the upper position of the draw-formed product which is the work material.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example of implementing the present invention will be described with reference to the drawings. FIG. 1 shows a workpiece W to be drilled by the method of the present invention.
2 is a plan view of an example of the sink, FIG. 2 is a plan view of an example of the device of the present invention, and FIG. 3 is a hole of the workpiece W shown in FIG. A plan view showing the state,
FIG. 4 is a plan view showing a state in which the workpiece W is drilled at the position of the hole H2 from the state of FIG. 3, and FIG. 5 is a partial cross-sectional view of the device of the present invention.

As shown in FIG. 1, the workpiece W is a sink, which is one of the draw-formed products, and is a flange formed on the outer periphery of the upper portion of the sink portion S that is drawn into a rectangular concave shape that is irregular in plan view. Round holes H1, H2, and H3 are drilled on the surface F, but these holes H1 to H3 may change in size depending on the design, or the number of holes and the pitch of the holes may change. Due to the irregular shape of the sink S, the die for processing the holes H1 to H3 and the standing wall Sw1 of the sink S may interfere with each other.

The present invention uses, as an example, a press for applying the method of the present invention to the workpiece W as described above.
It was configured as shown in the plan view of FIG. That is, 1 is a press body, and 2 is a hydraulic cylinder for driving a hammer A (see FIG. 5), which are arranged in the press frame 3 in a number corresponding to the upper mold 4. 5 (5A to 5E) is a mold holding device for accommodating and holding the upper mold 4 and the lower mold 6 (see FIG. 5), and 7 is for retracting the mold holding devices 5A to 5E or below the hammer A. It is a cylinder that is a drive source for moving, and is provided in pairs for each of the mold holding devices 5A to 5E. Reference numeral 8 is a support bar which is arranged on the edge of the press body 1 and receives the edge E1 of the workpiece W to support the workpiece W, 9 is a carriage, and 10 is a workpiece W attached to the carriage 9 A support bar 11 for receiving the edge E2 on the side opposite to the edge E1 and supporting the work W together with the support bar 8, and 11 for attaching the edge E2 of the work W to the carriage 9. Work piece W to hold
The clamper 12, which also constitutes the abutting reference surface of, is an abutting block which is attached to the carriage 9 and serves as the other abutting reference of the workpiece W. The carriage 9 is guided by the guide rail 13 and the feed screw The workpiece W held by the clamper 11 is positioned by 14 and the servo motor 15. The workpiece W is held by 9-15.
The positioning device is constructed by the numerical control.

In the drawing, reference numeral 16 is a control device for positioning the workpiece W and controlling the driving of the hammer A for pressing the upper die and driving control of the die holding device, and 17 driving the hammer A. Hydraulic unit for supplying hydraulic pressure, 18 is a guide rail for guiding the mold holding device 5A (see FIG. 5), and 19 is a retractable pin for positioning which is provided in a pair on the mold holding device (see FIG. 5). 5)), the hammer A is paired with the hydraulic cylinder-2, and the pin 19 is paired with the mold holding device.

FIG. 3 shows the holes of the workpiece W as described above.
H1 shows a state in which a die of the die holding device 5B is used to make a hole. The die holding devices 5A, 5C, 5D, and 5E are in the retracted position, and the die holding device 5B moves below the hammer-A. It is in the positioned position. When the workpiece W is positioned in order to make a hole in the hole H1 from the state of FIG. 2 with the mold of the mold holder 5B, the standing wall Sw1 of the sink portion S, which is the workpiece W, and the mold holder 5
Since B, 5C, 5D, and 5E are in a relationship where they do not interfere with each other, they do not have to be in the retracted position, but the mold holding device 5A interferes with the standing wall Sw1 of the sink portion S unless it is in the retracted position. It is necessary to position in the closed state.

FIG. 4 shows the hole H2 of the workpiece W from the state of FIG.
This shows the state where the die of the die holding device 5E is used for punching at the position of, and as described above with reference to FIG.
The mold holding device 5B positioned below A interferes with the standing wall Sw1 of the sink S unless the mold holding device 5B is retracted from that position. Therefore, the work piece W is retracted after the mold holding device 5B is retracted.
Position. Since the die holding device 5E does not interfere with the standing wall Sw1 of the sink S even when the workpiece W is moved for positioning, the die holding device 5E may be located under the hammer A for moving and positioning.

FIG. 5 is a partial cross-sectional view of the device of the present invention. When the mold of the mold holding device 5A in the retracted position is selected, the mold holding device 5A is guided to the guide rail 19. Then, the cylinder 7 moves to the bottom of the hammer A as shown in the drawing, and the pin 19 positions it so that punching by a press becomes possible.

In the above embodiment, the punching of the draw-formed product has been described, but the device of the present invention is not limited to this and can be used for the drilling of other members. Further, since the holes H1, H2, H3 in the embodiment are on a straight line, the action of the respective cylinders 7 and the respective pins 19 which can be retracted / removed from among the respective die holding devices 5A to 5E makes it possible to obtain the required die holding device. Although the positioning is done, if the machined hole is not in a straight line, the mold holding device 5A
5E may be positioned at any position within the range that does not come off the hammer A.

[0018]

The present invention is as described above, and since the apparatus of the present invention is equipped with a plurality of mold holding devices accommodating a pair of upper and lower molds, a desired mold holding among them is held. After selecting the mold for the machine, the other mold holding devices that interfere with the workpiece can be retracted to the non-interfering position for press working. Since it is possible to perform punching in sequence as described above without exchanging the die or making a special die, even if it is a draw-formed product with a complicated shape, multiple punching can be done in sequence. Therefore, it is possible to eliminate the troublesome work of exchanging the molds and reduce the number of necessary molds.

[Brief description of drawings]

FIG. 1 is a plan view of an example of a sink which is a workpiece W to be drilled by the method of the present invention.

FIG. 2 is a plan view of an example of the device of the present invention.

FIG. 3 is a hole H1 of the workpiece W shown in FIG. 1 by the device of the present invention.
FIG. 5 is a plan view showing a state in which holes are punched in the position by the mold of the mold holding device 5B.

FIG. 4 is a plan view showing a state in which a hole is formed at a position of a hole H2 of the workpiece W from the state of FIG.

FIG. 5 is a partial cross-sectional view of the device of the present invention.

[Explanation of symbols]

 W Work material (sink) F Flange surface of work material S Sink part of work material Sw1 Standing wall of sink part S H1, H2, H3 Machining holes A Hammer 1 Press machine body 2 Hydraulic cylinder-3 Press frame 4 Upper mold 5A, 5B, 5C, 5D, 5E Mold holding device 6 Lower mold 7 Mold holding device driving cylinder-8 Support bar 9 Carriage 10 Support bar 11 Clamper 12 Butt block 13 Guide rail 14 Feed screw 15 Servo motor 16 Controller 17 Hydraulic unit 18 Guide rail 19 Pin

Claims (2)

[Claims] 1. A plurality of mold holding devices in which a pair of an upper mold and a lower mold are accommodated in a press body and arranged in parallel, and a mold holding device for moving and positioning each mold holding device to a desired position. A positioning device for the device, a work positioning device for holding the workpiece and positioning it with respect to a desired pair of the upper die and the lower die of each of the die holding devices, and pressing the workpiece. A hammer that presses each upper mold to perform processing
And a drive device for the press are provided. 2. A plurality of mold holding devices in which a pair of upper mold and lower mold are accommodated in a press machine body and arranged in parallel, and a mold holding device for moving and positioning each mold holding device to a desired position. A positioning device for the device, a work positioning device for holding the workpiece and positioning it with respect to a desired pair of the upper die and the lower die of each of the die holding devices, and pressing the workpiece. A hammer that presses each upper mold to perform processing
When the draw-formed product, which is the workpiece, is positioned, at least one of the upper and lower molds or the mold-holding device is located at a position where it interferes with the draw-formed product. Is retracted to a position where it does not interfere with the draw-formed product, and when positioning of the draw-formed product is completed and pressing is performed by pressing the upper die, the upper and lower molds for processing the draw-formed product are retracted. In the case of (1), the method of controlling the positioning device of the die holding device so as to move and position the die holding device under the hammer to perform press working, a method of punching a press-formed product. .