JPS62244532A - Piercing die for annular plate and the like - Google Patents

Abstract

PURPOSE:To realize the strong stabilization of the annular body to be worked by suspending a positioning shaft on the center hole formed by a guide plate by sliding in the diameter direction the guide plate which is arranged on a fixing die and divided into more than three pieces which are arranged in the peripheral direction. CONSTITUTION:The body 10 to be worked is pinched by energizing a guide plate 5 in the direction of a positioning die 6 by a compression spring 8 by arranging the guide plate 5 in equal sized sector of the same shape on the upper face of a fixing die 1. The outer edge of each guide plate 5 is then fixed to the prescribed position by abutting it to the inner face of the body 10 to be worked by moving it to the external part against the spring 8 by project-the taper part 16b of a positioning shaft 16 into a center hole 9 by descending a lift die 17 together with a press die 12. With the device of this composition, the body to be worked can be surely fixed with good accuracy, so the positional precision of the hole can be improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a perforation mold which is highly effective and is used when perforating a large number of holes in the flange or annular plate of a flanged ring. be.

[Prior art and its problems]

Conventionally, when drilling a large number of bolt holes in the flange of a flanged ring, for example, the holes were drilled one by one using a drilling machine, which required a long time and the position of each bolt hole was difficult to drill. Accuracy was poor.

[Means for solving problems]

The present invention provides a horizontal root-shaped fixed mold in which a large number of punched holes are formed at predetermined positions near the periphery when drilling a large number of through holes in a workpiece as described in -; Divided into 3 or more pieces,
The fixed mold is circumferentially divided into 1 (3 or more) guide plates, and each guide plate is slidable in the diametrical direction by a guide device provided between the fixed mold and the fixed mold. When guided and biased in the centripetal direction by a spring, each guide plate slides in the centripetal direction, the size becomes large enough to fit the annular workpiece, and the inner end of each guide plate fits into the center hole. When each guide plate slides in the radial direction, the outer end of each guide plate comes into contact with the inner surface of the workpiece and is horizontal above the positioning die. Sh.

A large number of guide holes corresponding to each punched hole of the fixed mold are provided in the peripheral portion, and in the center of the lower surface, the lower end has a tapered shape and enters and exits the center hole formed by each guide plate of the positioning mold. Slide each guide plate.The positioning shaft is installed horizontally with the presser die on which the vertical positioning shaft is installed, and an elastic body is sandwiched between the upper surface of the presser die. A large number of punches that fit together freely are installed vertically, and an appropriate device is used to
The above-mentioned problems are solved by using a perforating die consisting of an elevating die that moves up and down with a presser die.

[For production]

According to the punching die of the present invention, immediately before drilling, the positioning die automatically expands to correctly position the workpiece, and then the fixed die and the elevating die can simultaneously punch a large number of through holes.

〔Example〕

The drawing shows the state in which the punching die of the present invention punches a hole in a workpiece and takes out the workpiece. A large number of punched holes (2) are drilled at key points on the top surface of the fixed mold (1).
Four pins arranged at equal intervals from each other on the same circumference (
3) is erected, and in the center of the fixed mold (1) is a shaft hole (
4) is perforated.

A positioning mold (6) divided into four fan-shaped guide plates (5) of the same shape and size is placed on the upper surface of the fixed mold (1).

Each guide plate (5) has an elongated hole (7) drilled in its center and facing in the radial direction, which engages with a pin (3) of the fixed mold (1).
A compression spring (
Due to the bias of 8), the positioning mold (6) is located in the inner eye and the side edges are brought into close contact with each other, and the positioning mold (6) has a disc shape.

A center hole (9) is formed in the center of the positioning mold (6) by the inner edges of the four guide plates (5), and the circle formed by the outer edges of each guide plate (5) is In the figure, the positioning type (6
) is the workpiece, a flanged ring (1
A large number of through holes (11) are bored in the flange portion (10a) of the flanged ring (10) with a smaller diameter than the inner diameter of the ring (10), as will be described later.

(12) is a disk-shaped presser mold that is horizontal above the flanged ring (10), and the annular portion (13) on the periphery has holes corresponding to the punched holes (2) of the fixed mold (1). , a guide hole (14) facing in the vertical direction is bored, and a positioning shaft (16) whose lower part is tapered in diameter is provided at the center of the lower surface of the plate-shaped part (15).
is installed vertically.

The upper cylindrical part (16a) of the positioning shaft (16) has a larger diameter than the center hole (9) of the positioning mold (6), and the lower end of the lower tapered part (16b) is larger than the center hole (9). It has a small diameter.

A horizontal disc-shaped elevating die (17) is attached above the presser die (12), sandwiching an elastic body (18) such as rubber, and on the lower peripheral edge of the elevating die (17), A large number of punches (
19) is installed vertically.

The lifting mold (17) can be moved to the holding mold (12) by an appropriate device.
Go up and down with

In the above-mentioned device, as shown in the figure, the presser mold (12) and the elevating mold (17) are raised, and each guide plate (5) is placed outside the positioning mold (6) located in the inner eye. The flange ring (10) to be processed is fitted, and the lifting die (7) is lowered together with the holding die (12).

Then, the tapered part (16b) of the positioning shaft (16) becomes
Each guide plate (5) is inserted into the center hole (9) formed in the positioning die (6) as shown by the imaginary line in FIG.
The outer edge of each guide plate (5) is moved outward against the spring (8) so that the outer edge of each guide plate (5) is aligned with the ring portion (10b) of the flanged ring (10).
) to secure the flanged ring (10) in place.

Then, the annular part (1:l) of the presser die (12) descends.
However, the flange part (10a) of the flanged ring (10)
is firmly held between the stationary mold (1) and each punch (19) of the elevating mold (17), which further descends, hits the flange part (
A through hole (11) is bored in 10a).

When the elevating die (17) and presser die (12) are raised after drilling, the positioning shaft (16) is removed from the center hole (9), and each guide plate (5) is moved by the spring (8). The flanged ring (10), which is moved in the centripetal direction by the urging of the ring and has a large number of through holes (11), can be easily removed.

〔Effect of the invention〕

- As mentioned in L, by using the drilling die of the present invention, it is possible to simultaneously drill a large number of holes in the flange or annular plate of a flanged ring, so the drilling work can be completed in a significantly shorter time.

In addition, when drilling, the positioning die and positioning shaft automatically position the workpiece at a predetermined position and drill according to the arrangement of the punch and the punch, so the position of the drilled through hole is is accurate.

Furthermore, in the embodiment of the child chain, a case has been described in which a circular flanged ring is bored, but the present invention can also be effectively applied to a rectangular annular workpiece.

4. Drawings Wi, 1-tJ, Explanation FIG. 1 is a central longitudinal sectional front view showing the perforation mold of the present invention when removing a workpiece that has been processed, and FIG. It is an A-line sectional view.

(1) Fixed type (2) Punched hole (3) Pin
(4) Shaft hole (5) Guide plate (6) Positioning mold (7) Long hole (8) Compression spring (9) Center hole
(10) Flange ring (10a) flange part
(], Ob) Ring part (11) Through hole (
12) Holding mold (13) Annular part (14) Guide hole (15) Plate part (16) Positioning shaft (1
6a) Cylindrical part (16b) Tapered part (17)
Elevating type (18) Elastic body (19) Punch] =8-

Claims (1)

[Claims] A horizontal plate-shaped fixed mold with a large number of punched holes punched at predetermined positions near the periphery, and a guide plate that is divided into three or more parts and arranged circumferentially on the fixed mold. Then, each guide plate was slidably guided in the diametrical direction by a guide device provided between the fixed mold and biased in the centripetal direction by a spring, so that each guide plate slid in the centripetal direction. When the annular workpiece becomes large enough to be fitted onto the outside, the inner end of each guide plate forms a center hole, and when each guide plate slides in the radial direction, the outer end of each guide plate becomes , a positioning die that comes into contact with the inner surface of the workpiece, a horizontal position above the positioning die, and a number of guide holes corresponding to each punched hole of the fixed die formed on the periphery, and a hole in the center of the lower surface. The presser mold has a tapered lower end and is horizontal with a positioning shaft having a vertical positioning shaft that enters and exits the center hole formed by each guide plate of the positioning mold and slides each guide plate. , is attached to the upper surface of the presser die with an elastic body sandwiched therebetween, and a number of punches are installed vertically at the lower periphery of the presser die to slidably fit into each guide hole of the presser die, and the presser die is held by an appropriate device. An elevating type that moves up and down along with it, and a perforated type such as an annular plate.