JPH0661496U - Punch pin support device for punch press machine - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a punch pin supporting device in a punch press device, which enables easy attachment / detachment work of the punch pin. A support for supporting a punch pin 1 mounted on an axis of a punch pin sleeve 3 on an axis of a punch pin holder 9 movably arranged through a bearing 8 in a hole formed in a punch holder 6. In the apparatus, the outer diameter of the punch pin 1 mounted on the axial center of the punch pin sleeve 3 is loosely fitted to the punch pin holder 9 and the inner diameter is tightly fitted to the shaft portion 1b of the punch pin 1. Now, the ring 2 made of synthetic resin having a length longer than that of the cutting blade portion 1c of the punch pin 1 is attached to the cutting blade portion 1c.
It was attached so as to cover.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a punch pin supporting device in a punch press device.

[0002]

[Prior art]

 As a punching device for punching a ceramic green sheet, for example, the device disclosed in Japanese Patent Laid-Open No. 171800/1991 has been proposed. With this punch device, the punch pin mounted on the punch pin sleeve is fixed to the punch pin fixed to the die set in the hole formed in the punch holder. Is configured to support.

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

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 made by kneading hard ceramic powder with a binder to form a sheet, the punch pin is heavily worn and it is necessary to replace the punch pin once or several times a day. ing.

When the punch pin is replaced, the punch pin sleeve is removed from the punch pin holder, the punch pin attached to the punch pin sleeve is replaced with a new punch pin, and then the punch pin sleeve is attached to the punch pin holder.

[0006]

[Problems to be solved by the device]

 This kind of punch pin replacement work is performed with the cutting edge of the extremely small diameter punch pin exposed, and it is difficult to visually check if the cutting edge of the punch pin breaks for some reason. It required a great deal of attention and the workability was poor.

In view of the above-mentioned circumstances, an object of the present invention is to provide a punch pin supporting device in a punch press device, which enables easy attachment / detachment work of the punch pin.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, a punch pin mounted on a hole formed in a punch holder is attached to an axis of a punch pin holder movably arranged via a bearing and an axis of a punch pin sleeve. In a punch pin supporting device designed to support the punch pin, if the outer diameter of the punch pin mounted on the axis of the punch pin sleeve is fitted to the punch pin holder and the inner diameter is fitted to the punch pin shaft portion, A ring made of synthetic resin having a size that is larger than the length of the cutting edge portion of the punch pin was attached so as to cover the cutting edge portion.

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

[0010]

[Action]

 By attaching a ring to the tip of the punch pin, the cutting edge can be protected, so the cutting edge does not break when the punch pin is inserted into the punch pin holder, and it is easy to insert the punch pin. Therefore, the workability can be improved. Also, the ring attached to the punch pin hits the bottom of the hole in the punch holder and stops moving when the punch pin is inserted into the punch pin holder to the specified position, so the ring and punch pin move relative to each other. The ring moves to the center of the punch pin shaft. Therefore, by looking at the mounting position of the ring, it can be easily discriminated whether it is before use or after use, and the management of the punch pin can be facilitated.

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

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a punch pin, which is integrally formed with a base portion 1a, a shaft portion 1b, and a cutting blade 1c. Reference numeral 2 denotes a synthetic resin ring, the outer diameter of which is loosely fitted to the punch pin holder described later, and the inner diameter of which is fitted to the shaft portion 1a of the punch pin 1, and the length of which is the cutting edge portion of the punch pin 1. It is formed longer than the length of 1c. A punch pin sleeve 3 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 portion 1a of the punch pin 1 is inserted, and a screw is provided at one end of the large diameter hole. Has been formed. Reference numeral 4 denotes a screw, which is screwed into the screw of the punch pin sleeve 3.

Then, 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 edge portion 1c of the punch pin 1 as shown in FIG. Attach to the tip of the part 1b.

In FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals. 5 is the 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. A bearing 8 is inserted so as to be positioned inside the sleeve 7. A punch pin holder 9 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 fitted to the punch pin sleeve 3 and fitted with the ring 2 at 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. 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, so the punch pin 1 and the ring 2 move relative to each other, and the ring 2 moves to the center of the shaft portion 1b of the punch pin 1. Will move. Since the shaft portion 1b of the punch pin 1 and the ring 2 are a tight fit, the ring 2 is supported by the central portion of the shaft portion 1b of the punch pin 1. Therefore, when the punch pin 1 is replaced, it is possible to easily determine whether the punch pin 1 is before use or after use by checking the position of the ring 2.

Further, since the cutting blade portion 1c at the tip of the punch pin 1 is guided by the ring 2, even if the punch pin 1 and the punch pin 1 are slightly bent, the cutting blade portion 1c is accurately positioned. Therefore, 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, the identification can be facilitated.

[0018]

[Effect of device]

 As described above, according to the present invention, the punch pin holder, which is movably disposed through the bearing in the hole formed in the punch holder, is attached to the punch pin sleeve. In the punch pin supporting device configured to support the punch pin, if the outer diameter of the punch pin mounted on the shaft center of the punch pin sleeve is fitted to the punch pin holder and the inner diameter of the punch pin is set to the shaft portion of the punch pin, The ring is made of synthetic resin and has a length that is longer than the length of the cutting edge of the punch pin, and is attached so as to cover the cutting edge. It is possible to improve workability.

Further, since the color of the ring is changed according to the thickness of the cutting edge portion, it is possible to easily identify the thickness of the punch pin.

[Brief description of 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 supporting device according to the present invention.

[Explanation of symbols]

 1 Punch Pin 1b Shaft 1c Cutting Blade 2 Ring 3 Punch Pin Sleeve 6 Punch Holder 8 Bearing 9 Punch Pin Holder

Claims (2)

[Scope of utility model registration request] 1. A punch pin adapted to support a punch pin mounted on the axial center of a punch pin sleeve on the axial center of a punch pin holder movably arranged through a bearing in a hole formed in the punch holder. In the supporting device of, the tip of the punch pin mounted on the axis of the punch pin sleeve, the outer diameter is a clearance fit to the punch pin holder, the inner diameter is a size to fit into the shaft portion of the punch pin, A punch pin supporting device in a punch press device, wherein a synthetic resin ring having a length longer than that of a cutting blade portion of the punch pin is mounted so as to cover the cutting blade portion. 2. The punch pin supporting device in a punch press device according to claim 1, wherein the color of the ring is changed according to the thickness of the cutting blade portion.