JP2567527Y2 - Punch pin support device in punch press machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch pin supporting device in a punch press device.

[0002]

2. Description of the Related Art As a punching apparatus for punching a ceramic green sheet, for example, Japanese Patent Laid-Open Publication No. 1-1
An apparatus disclosed in Japanese Patent Application No. 71800 is proposed.
In this punch device, a punch pin mounted on a punch pin holder axially mounted on a punch pin holder shaft movably disposed via a bearing in a hole formed in a punch holder fixed to a die set. It is configured to support.

Many of the holes formed in the ceramic green sheet have a diameter of about 0.1 mm to 0.3 mm.

[0004] A punch pin used in a punch device for processing such a small-diameter hole is generally formed of a sintered alloy. However, since the ceramic green sheet is formed by kneading a hard ceramic powder with a binder to form a sheet, the punch pins are severely worn, and it is necessary to replace the punch pins once or several times a day. .

When replacing a punch pin, the punch pin sleeve is removed from the punch pin holder, the punch pin mounted on the punch pin sleeve is replaced with a new punch pin, and then the punch pin sleeve is mounted on the punch pin holder.

[0006]

The replacement work of such a punch pin is performed in a state where the cutting blade portion of the extremely small diameter punch pin is exposed, and even if the cutting blade portion of the punch pin is broken for some reason, it is visually confirmed. Since it was difficult to confirm, careful attention was required and workability was poor.

An object of the present invention is to provide a punch pin supporting device in a punch press device which can easily perform a punch pin attaching / detaching operation in view of the above circumstances.

[0008]

In order to achieve the above object, according to the present invention, a punch is provided on a hole formed in a punch holder, on a shaft center of a punch pin holder movably disposed via a bearing. In a punch pin supporting device adapted to support a punch pin mounted on the axis of a pin sleeve, at the tip of the punch pin mounted on the axis of the punch pin sleeve, the outer diameter is loosely fitted in the punch pin holder, A synthetic resin ring whose inner diameter was large enough to fit into the shaft of the punch pin and whose length was longer than the length of the cutting blade of the punch pin was mounted so as to cover the cutting blade.

Further, the color of the ring is changed depending on the thickness of the cutting blade.

[0010]

The cutting blade can be protected by attaching a ring to the tip of the punch pin, so that the cutting blade does not break when the punch pin is inserted into the punch pin holder. It becomes easy and workability can be improved. Further, when the ring attached to the punch pin is inserted into the punch pin holder to a predetermined position, the ring hits the bottom surface of the hole of the punch holder halfway and stops moving, so that the ring and the punch pin move relative to each other, The ring moves to the center of the shaft of the punch pin. Therefore, by observing the mounting position of the ring, it can be easily determined whether it is before or after use, and the management of the punch pins can be facilitated.

Further, by changing the color of the ring,
Since the thickness can be determined, management can be further facilitated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. ◆ In FIG. 1, reference numeral 1 denotes a punch pin,
a, the shaft portion 1b, and the cutting blade 1c are integrally formed. 2
Is a synthetic resin ring whose outer diameter is loosely fitted in a punch pin holder to be described later, and whose inner diameter is the shaft portion 1a of the punch pin 1.
The punch pin 1 has a size longer than the length of the cutting blade portion 1c. Reference numeral 3 denotes a punch pin sleeve which has a small diameter hole through which the shaft portion 1b of the punch pin 1 penetrates and a large diameter hole into which the base 1a of the punch pin 1 is inserted, and a screw at one end of the large diameter hole. Is formed. Reference numeral 4 denotes a screw which is screwed into the screw of the punch pin sleeve 3.

After the punch pin 1 is mounted on the punch pin sleeve 3 and fixed with the screw 4, the ring 2 is attached to the shaft of the punch pin 1 so as to cover the cutting blade 1c of the punch pin 1 as shown in FIG. 1b.

In FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals. 5 is a top plate of the die set.
A punch holder 6 is fixed to the upper plate 5. Reference numeral 7 denotes a sleeve which is inserted into a hole formed in the upper plate 6. Reference numeral 8 denotes a bearing which is inserted so as to be located inside the sleeve 7. Reference numeral 9 denotes a punch pin holder which is movably supported inside the bearing 8 and is pushed upward by a spring 10.

Then, as shown in FIG. 1, the punch pin 1 mounted on the punch pin sleeve 3 and having the ring 2 attached to the tip is inserted into the punch pin holder 9. At this time, since there is a gap between the punch pin holder 9 and the ring 2,
The ring 2 moves together with the punch pin 1. Ring 2
When the ring 2 comes into contact with the bottom surface of the hole of the punch holder 6, the movement of the ring 2 is stopped. Therefore, the punch pin 1 and the ring 2 relatively move, and the ring 2 moves to the center of the shaft 1 b of the punch pin 1. Since the shaft 1b of the punch pin 1 and the ring 2 are fitted with each other, the ring 2 is supported at the center of the shaft 1b of the punch pin 1. Therefore, when replacing the punch pin 1, by checking the position of the ring 2, it is possible to easily determine whether the punch pin 1 is before use or after use.

The cutting blade 1 at the tip of the punch pin 1
Since c is guided by the ring 2, even if the punch pin 1 is slightly bent, the cutting blade portion 1c can be accurately positioned, and the insertion work can be facilitated.

Further, by changing the color of the ring 2 according to the thickness of the cutting blade portion 1c of the punch pin 1, its identification can be facilitated.

[0018]

As described above, according to the present invention, in the hole formed in the punch holder, the shaft center of the punch pin holder movably disposed via the bearing, and the shaft center of the punch pin sleeve. In a punch pin supporting device adapted to support a mounted punch pin, an outer diameter is loosely fitted in the punch pin holder at an end of the punch pin mounted on a shaft center of the punch pin sleeve, and an inner diameter is set in the axis of the punch pin. A ring made of synthetic resin having a size that fits into the part and having a length longer than the length of the cutting blade part of the punch pin is attached so as to cover the cutting blade part, thereby facilitating insertion work. And workability can be improved.

Further, since the color of the ring is changed depending on the thickness of the cutting blade, the thickness of the punch pin can be easily identified.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a mounted state of a punch pin and a ring according to the present invention.

FIG. 2 is a front sectional view showing an example of a punch pin support device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Punch pin 1b Shaft 1c Cutting edge 2 Ring 3 Punch pin sleeve 6 Punch holder 8 Bearing 9 Punch pin holder

Claims (2)

(57) [Scope of request for utility model registration] 1. A punch pin which supports a punch pin mounted on a shaft center of a punch pin sleeve on a shaft center of a punch pin holder movably disposed via a bearing in a hole formed in the punch holder. In the supporting device, the outer diameter of the punch pin is fitted into the punch pin holder at the tip of the punch pin mounted on the axis of the punch pin sleeve, and the inner diameter fits into the shaft of the punch pin. A punch pin supporting device in a punch press device, wherein a ring made of a synthetic resin having a length longer than the length of the cutting blade portion of the punch pin is mounted so as to cover the cutting blade portion. 2. The punch pin supporting device according to claim 1, wherein the color of the ring is changed depending on the thickness of the cutting blade.