JP2505311Y2 - Stamping device for sidewall of stamped products - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sidewall marking device for a pressed product, and more particularly to a sidewall marking device capable of marking during a pressing process.

[0002]

2. Description of the Related Art Conventionally, when a company name, a product type, etc. are stamped on the side wall of a stamped product, the stamping process is performed by using a dedicated machine.

Therefore, in the prior art, a space for installing a dedicated machine as a marking device is required, the number of strokes of the press is determined according to the processing speed of the dedicated machine, and the productivity is lowered. There is a problem that it is necessary to stock as a semi-finished product the number of products that can not be processed with a special machine by increasing the number, or it is necessary to install multiple special machines according to the press stroke.

[0004]

The problem to be solved by the present invention is to provide a side wall marking device for a stamped product capable of engraving characters or symbols on the side wall of the machined product in the mold during the press working process. Is to provide.

[0005]

Means for solving the problem in the present invention is a product lifter which can be moved up and down in a lower mold and has a rising limit which is at the same height as the upper surface of the lower mold and is rotatable. A pilot punch rotatably provided in the upper die corresponding to the product lifter, and a marking punch provided in the lower die adjacent to the product lifter so as to be capable of reciprocating in the horizontal direction. It is characterized in that the device is incorporated in the final step of the transfer press.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of the whole assembly, FIG. 2 is a sectional view of a main portion, and FIG. 3 is a transverse sectional view. In these figures,
A lower die 1 provided on a bolster (not shown) is provided with a liftable and rotatable product lifter 2, and a slide 3 of a press is provided with a pilot punch 4 that is movable up and down together with the slide 3 and is rotatable. There is. In addition, a marking punch 5 which horizontally reciprocates adjacent to the product lifter 2 is provided in the lower die 1, and these marking devices 6 are incorporated in, for example, the final step of a transfer press. .

The lower mold 1 has a recessed hole 7 for receiving a product.
And the product lifter 2 is housed in the recessed hole 7. A lift cylinder 8 is provided at the lower part of the recessed hole 7 so as to be able to move up and down, and the product lifter 2 is rotatably provided at the upper end of the lift cylinder 8. A core shaft 9 fixed to the lower end of the product lifter 2 is rotatably accommodated in the lift cylinder 8, and a bearing 10 is mounted between the lift cylinder 8 and the product lifter 2. On the other hand, the lift cylinder 8
Is urged upward by a coil spring 12 mounted between the lower die 1 and a substrate 11 on which the lower die 1 is placed.
Inside, it reaches the same height as the upper surface of the lower mold 1.

The pilot punch 4 is rotatably provided in an upper die 13 provided on the slide 3 via a bearing 14, and a knockout rod 15 is accommodated therein. Furthermore, the knockout rod 15
Is urged downward by a coil spring 16 and the like. The pilot punch 4 has a length projecting from the lower end of the upper die 13, and when the slide 3 descends, the upper die 13 is joined to the lower die 1, and at the same time, the pilot punch 4 is attached to the lower die 1. It enters the recess hole within 7 depresses the workpiece 17 which is supplied to the concave hole 7 with the product lifter 2.

The state of FIG. 1 is the pilot punch 4
Indicates that the outer upper mold 13 comes into contact with the lower mold 1 after joining the product lifter 2 and pushing down the product lifter 2. This state is before the bottom dead center, and then the slide 3 moves downward. While reaching the dead point, the pilot punch 4 and the outer upper die 13 are stopped, and only the slide 3 descends.

Marking work is performed from the position shown in FIGS. 1 and 2 to the bottom dead center. At this position, the marking punch 5 moves in the horizontal direction to mark a character or symbol on the side wall of the workpiece 17. In FIG. 2, a fluid cylinder mechanism 18 that operates in a horizontal direction, which is a direction orthogonal to the vertical direction of the slide 3, is provided, and the product lifter 2 is provided at the tip of a piston rod 20 protruding from a cylinder 19 of the fluid cylinder mechanism 18. A punch holder 21 that extends beyond is provided.

The punch holder 21 is slidably accommodated in a guide hole 22 formed through the lower die 1 in a horizontal direction so that the stamp punch 5 can be replaced on the surface facing the workpiece 17. It is provided. The piston rod 20
The punch holder 21 and the punch holder 21 are connected to each other by a connecting fitting 23.
It is advisable to provide a roller or the like between 4 and 4. Further, corresponding to the punch holder 21, two receiving wheels 25 are provided on opposite sides of the work piece 17 so as to come into contact with the side wall of the work piece and rotate to prevent escape of the work piece.

In the embodiment, the product lifter 2 and the pilot punch 4 are only configured to rotate independently, and when the marking punch 5 moves to mark a character or symbol on the workpiece 17, the marking punch 5 moves. With the movement of 5, the product lifter 2 and the pilot punch 4, which hold the processed product 17, are rotated. The receiving ring 25 serves to prevent the processed product 17 from escaping and prevent the processed product from being damaged.

In addition to this, when the marking punch 5 operates, if the marking punch 5 wobbles and the upper die is rubbed, the marking work will be hindered. To prevent this, the upper die 13 is prevented.
Block means is provided between the lower mold 1 and the lower mold 1. This block means is a fluid cylinder mechanism 26, which comprises a cylinder 27 provided in the upper die and a fixed plate 29 connected to the tip of a piston rod 28 protruding from the cylinder 27.

The fixed platen 29 is a space 2a formed in the lower mold 2.
A donut-shaped disc provided movably in the vertical direction within the disc, which is engaged with a step portion 8a of the lift cylinder 8;
At the bottom dead center of the press, the lift cylinder 8 is prevented from being lifted up by the force of the piston rod 28 protruding from the cylinder 27, and a stable operation of the marking punch 5 is ensured.

Although the marking punch 5 is reciprocated by the fluid cylinder mechanism 18, it can be driven by a cam mechanism instead of the fluid cylinder mechanism.

The embodiment has the above-mentioned structure, and the marking device 6
Is incorporated into the final process of the transfer press.
When the slide 3 is at the top dead center, the product lifter 2 is the lift cylinder 8
And the product lifter 2 reaches the same plane as the lower mold 1. Then, when the pressed work 17 is conveyed and supplied to the product lifter 2 and then the slide 3 descends, the pilot punch 4 enters the inside of the work 17 and resists the coil spring 12 together with the product lifter 2. Then push it into the lower mold. When the slide 3 is near the bottom dead center, the pilot punch 4 reaches the lower limit when the upper die 13 is joined to the lower die 1, and the pilot punch 4 and the upper die 13 stop at this position, but this position is at the bottom dead center. The slide 3 continues to descend to the bottom dead center at the position immediately before.

The marking punch 5 operates while the pilot punch 4 reaches the lower limit and holds the workpiece 17 together with the product lifter 2. The stamp punch 5 stamps characters or symbols on the side wall of the workpiece 17 while the punch holder 21 is moved horizontally by the fluid cylinder mechanism 18. At the time of engraving, the processed product 17 rotates because the product lifter 2 and the pilot punch 4 both rotate with the movement of the engraving punch 5.
By the linear movement of the marking punch 5, the side wall portion of the product, that is, the curved surface portion is marked.

Since the receiving ring 25 is provided at a corresponding position with the marking punch 5 sandwiched therebetween, even if the product is pressed by the movement of the marking punch 5, the receiving ring 25 does not allow the processed product to escape, and the cylinder The mechanism 26 rotates without floating the workpiece, so that the workpiece is not damaged.

Since the marking punch 5 can be reciprocated, the marking work may be carried out for each of forward and backward movements, and when the product is replaced, the marking punch is first returned to the original position and then the marking work is performed. May be performed.

After the stamping work by the stamping punch 5, the pressing force of the cylinder mechanism 26 is released as the upper die 13 is lifted, the lift cylinder 8 is lifted by the coil spring 12, and at the same time, the work piece 17 is struck by the knockout rod 15. Remove from mold.

[0021]

EFFECTS OF THE INVENTION The present invention can improve the productivity because the characters or symbols can be imprinted on the side wall of the product as a part of the built-in press working during the press working process, and the marking work is synchronized with the working speed of the press. It has the effect of being excellent.

[Brief description of drawings]

FIG. 1 is an overall sectional view of an assembly.

FIG. 2 is a sectional view of a main part of FIG.

FIG. 3 is a cross-sectional view.

[Explanation of symbols]

 1 Lower Die 2 Product Lifter 3 Slide 4 Pilot Punch 5 Engraving Punch 6 Engraving Device 7 Recessed Hole 8 Lift Cylinder 9 Core Shaft 10 Bearing 11 Board 12 Coil Spring 13 Upper Die 14 Bearing 15 Knockout Rod 16 Coil Spring 17 Worked Product 18 Fluid Cylinder Mechanism 19 Cylinder 20 Piston Rod 21 Punch Holder 22 Guide Hole 23 Connecting Metal Fitting 24 Guide Rail 25 Bearing Ring 26 Fluid Cylinder Mechanism 27 Cylinder 28 Piston Rod 29 Fixed Plate

Claims (1)

(57) [Scope of utility model registration request] 1. A product lifter that can be raised and lowered in a lower mold and has a rising limit that is flush with the upper surface of the lower mold and is rotatably provided, and is rotatably provided in an upper mold corresponding to the product lifter. A pilot punch, and a marking punch provided in the lower mold so as to be horizontally reciprocally movable adjacent to the product lifter, and these devices are incorporated in the final step of the transfer press. A stamping device for sidewalls of stamped products.