JPH0750030Y2 - Punching chip recovery mechanism of punching device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching tip collecting mechanism for a punching device. More specifically, the present invention relates to an improvement in the recovery performance of a mechanism for, in a punching device for punching a relatively soft and thin punching material with a punch or a die, a mechanism for stripping and collecting a punched chip punched from the punching material by vacuum.

[0002]

2. Description of the Related Art Conventionally, as a punching tip collecting mechanism of a punching device, for example, one shown in FIG. 6 is known.

In the punching chip collecting mechanism of the conventional punching device, the punch 2 is mounted on the upper half 11 side of the U-shaped machine frame structure so as to be able to move up and down and faces the punch 2 on the lower half 12 side. Of the punch 2 in which the punching material P, which is installed in the punching device in which the die 3 is fixedly attached, descends and abuts the upper surface 31 of the die 3 into the plunging hole 32 in the punching die 3. The punching tip P ′ attached to the tip 21 is stripped and collected from the tip 21 of the punch 2 by vacuum, and the collection path 4 is connected to the penetration hole 32 inside the die 3 to a vacuum pump outside the die 3. It is formed.

In the punching tip collecting mechanism of such a conventional punching apparatus, when the punching material P is a soft thin material such as a ceramic green sheet, the sticking force of the punching tip P'to the tip 21 of the punch 2 is set. Becomes stronger, the punching tip P'cannot be reliably stripped and collected by vacuum, and the punching tip P'may remain at the tip 21 of the punch 2 even if the punching is performed. There is a problem that continuous punching may become impossible or the punched holes may be damaged due to the remaining punched tip P '.

[0005]

The present invention has been made in consideration of the above-mentioned problems. The object of the present invention is to cut viscous punching chips such as ceramic green sheets from the tip of the punch. An object of the present invention is to provide a punching chip collecting mechanism of a punching device that can surely strip and collect.

[0006]

[Means for Solving the Problems] The technical means taken to achieve the above object is as follows: Claim 1 is for punching a punching material and vacuuming a punching tip attached to the tip of a punch protruding from a die. A recovery path with a tapered recovery port for stripping and recovery from the tip of the punch is provided in communication with the entry hole of the die, and compressed air is blown from the upper side of the recovery port to the tip of the punch protruding from the die. The gist of the invention is to open the blowing port around the punch and connect the air blowing port to the compressed air supply source. According to a second aspect of the present invention, a die is provided with a recovery passage having a tapered recovery port for removing the punching tip, which is punched out of the punching material and adhered to the tip of the punch protruding from the die, by vacuuming to remove the punching tip from the tip of the punch. And a curved flow restricting portion for communicating compressed air to the recovery port along the punch protruding from the die so as to surround the recovery port. The gist is that the air blowing port that communicates with the compressed air supply source is faced to.

[0007]

(Claim 1) The impact stripping force of forcibly directing compressed air from the side toward the punch protruding from the die from the air blowing port on the recovery port and the flow velocity from the tapered recovery port. A viscous adherent chip such as a ceramic green sheet is stripped from the punch in cooperation with the suction stripping force of the vacuum that is accelerated and sucked. (Claim 2) The compressed air returned from the die along the punch toward the recovery port in the curved flow control section accelerates the flow velocity from the tapered constriction recovery port and is sucked and deprived by the vacuum. As a result, viscous adhered chips such as ceramic green sheets are stripped from the punch.

[0008]

Since the present invention is constructed as described above, it has the following advantages. (Claim 1) A strong suction force is synergized from a tapered recovery port while directly impacting the punching tip attached to the punch by the pressure of the compressed air to the tip of the punch protruding from the die. Since the punched chips attached by the action are stripped and collected, even sticky chips such as ceramic green sheets can be reliably stripped from the punch and collected. (Claim 2) Since the pressing force by the compressed air becomes the suction pressing force which further strengthens the strong suction force from the constricted recovery port through the curved flow restricting portion, the ceramic green sheet of the same manner as described above is obtained. Even sticky chips that are viscous can be reliably stripped from the punch and collected.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a punching tip collecting mechanism of a punching device according to the present invention will be described below with reference to FIGS.

FIGS. 1 and 2 show a first embodiment of a punching tip collecting mechanism of a punching device according to the present invention.

In this embodiment, the basic structure relates to a punching device which is substantially the same as the conventional example shown in FIG. Further supplementally explaining, the punch 2 is covered and housed in a protective cover 22 made of rubber or the like, and when the punching material P is punched, the protective cover 22 is pressed and deformed to the punching material P to expose the tip 21 from the protective cover 22. It is like this. Dice 3 is
It is adapted to be fitted and attached to the die holder 5 provided in the lower half portion 12 of the machine frame structure 1. In addition, the die holder 5 is a die accommodating portion into which the die 3 is fitted and attached.
51 is provided, and screw portions 53 and 54 are engraved on the inner peripheral surface and the outer peripheral surface of the lower end of the sleeve 52 extending from the die accommodating portion 51 to the lower end.

The recovery path 4 of this embodiment has a die holder 5
It is arranged and formed by a guide tube 6 attached to the.
The guide tube 6 includes an upper guide tube 61 which is screwed to a threaded portion 53 on the inner peripheral surface of the sleeve 52 of the die holder 5 and is arranged near the protrusion hole 32 inside the die 3, and an outer circumference of the sleeve 52 of the die holder 5. It is arranged and formed by a lower guide cylinder 62 which is screwed to the threaded portion 54 of the surface and is arranged to the outside of the die 3. The upper guide cylinder 61 has a tapered portion 61a formed in a tapered shape on the upper portion, a recovery port 61b which is opened at the center of the tapered part 61b and faces the entry hole 32 of the die 3 and serves as the starting end of the recovery path 4,
A screw part that is engraved on the outer peripheral surface of the lower part and screwed into the screw part 53
61c and. The lower guide cylinder 62 includes a screw portion 62a that is engraved on the inner peripheral surface of the upper portion and is screwed to the screw portion 54, and a connecting portion 62b that is provided in the lower portion and to which a hose that is connected to a vacuum pump (not shown) is connected. ing.

Between the taper portion 61a of the upper guide cylinder 61 of the guide cylinder 6 in which the recovery passage 4 is formed and the die 3, the punch 2 which is inserted into the penetration hole 32 of the die 3 has a gap structure therebetween.
A nozzle-shaped air blow-out port 7 is formed which faces the direction of the tip 21 and the punching tip P ′ attached thereto. The air blowing port 7 is connected to a compressed air supply source (hereinafter referred to as an air compressor) 9 via an air supply passage 8. The air supply passage 8 has a gap 81 between the outer peripheral surface of the upper guide cylinder 61 of the guide cylinder 6 and the inner peripheral surfaces of the sleeve 52 of the die 3 and the die holder 5, and a communication hole 82 opened in the sleeve 52 of the die holder 5. It comprises a gap 83 between the outer peripheral surface of the lower guide cylinder 62 of the guide cylinder 6 and the lower half portion 12 of the machine frame structure 1.

According to such an embodiment, by driving the air compressor 9, the air is supplied through the air supply passage 8.
The compressed air is blown from the side in the direction of the tip 21 of the punch 2 projecting from the air blowing port 7 through the projecting hole 32 of the die 3 and the punching tip P ′ attached to this.

As a result, the compressed air is directly radiated to the punching tip P'and the pressing force (impact force) is directly applied to the punching tip P ', and the suction force (peeling force) to the recovery passage 4 by the vacuum is exerted.
Therefore, even if the adhesive force of the punching tip P ′ to the tip 21 of the punch 2 is considerably strong, the punching tip P ′ can be reliably stripped and collected. The tapered portion of the upper guide tube 61 of the guide tube 6 forming the air blowing port 7
From the structure of 61a and the recovery port 61b opened in the center,
Since the stripping force due to the air blowing and the stripping force due to the vacuum can be concentrated in the collection port 61b, the punching tip P'can be stripped and collected without scattering in a strange direction.

3 to 5 show a second embodiment of the punching tip collecting mechanism of the punching device according to the present invention, in which the upper guide cylinder 61 of the guide cylinder 6 in the first embodiment is doubled. It is as a structure.

That is, a screw portion 61b is also provided on the inner peripheral surface of the lower portion of the upper guide cylinder 61, and the auxiliary guide cylinder 63 is screwed thereto. The auxiliary guide tube 63 has substantially the same structure as the upper guide tube 61 of the first embodiment, and has a relatively large hole at the center of the taper portion 63a and the taper portion 61b which are formed in a tapered shape in the upper portion. Tube 61
The recovery port 61b is provided with a recovery port 63b facing the recovery port 61b, and a screw part 63c engraved on the outer peripheral surface of the lower part and screwed into a screw part 61c on the outer peripheral surface of the lower part of the upper guide cylinder 61.

Further, in the upper guide cylinder 61, the recovery port 61b is opened relatively large corresponding to the recovery port 63b of the auxiliary guide cylinder 63, and the taper portion 61a comes into contact with the die 3 and the taper portion of the auxiliary guide cylinder 63. An air blowing port 7 is formed between the air blowing port 63 and 63a. Around the periphery of the recovery port 61b of the taper portion 61a of the upper guide cylinder 61, a curved flow restricting part 61e curved in the direction of the recovery port 63b of the auxiliary guide cylinder 63 is provided.

As the air supply passage 8, in addition to the first embodiment, a communication hole 84 opened slightly below the taper portion 61a of the upper guide cylinder 61 and an inner peripheral surface of the upper guide cylinder 61. A gap 85 is provided between the upper part of the auxiliary guide tube 63 and the upper part of the outer peripheral surface of the auxiliary guide tube 63.

According to such an embodiment, the compressed air is returned from the air blowing port 7 to the inside of the recovery passage 4 along the punch from the entry hole 32, and the compressed air is blown. Since the vacuum is accelerated, the negative pressure (deprivation force) to the recovery path 4 due to the vacuum can be increased, so that the punching tip P ′ to the tip 21 of the punch 2 can be strongly attached. The removed chip P ′ can be reliably stripped and collected.

Further, according to this embodiment, since the air blowing port 7 is formed by the taper portion 61a of the upper guide tube 61 and the taper portion 63a of the auxiliary guide tube 63, the shape of the air blowing port 7 etc. There is an advantage that there is flexibility in design changes.

In addition to the illustrated embodiment, an embodiment in which the air blowing port 7 and the air supply passage 8 are directly provided in the die 2 and the die holder 5 without providing the guide tube 6 like a groove structure is possible. Is.

[Brief description of drawings]

FIG. 1 is a side sectional view (including a partially enlarged view) showing a first embodiment of a punching tip collecting mechanism of a punching device according to the present invention.

FIG. 2 is an enlarged sectional view taken along line XX of FIG.

FIG. 3 is a side sectional view showing a second embodiment of the punching tip collecting mechanism of the punching device according to the present invention.

FIG. 4 is an enlarged sectional view taken along line YY of FIG.

5 is an enlarged sectional view taken along line ZZ of FIG.

FIG. 6 is a side view of the entire punching device including an enlarged view of a main part of a punching tip collecting mechanism for showing a conventional example.

[Explanation of symbols]

 2 punches 3 dies 4 collection paths 7 air blowing ports P punching materials P'punching tips 32 plunge holes 62 curved flow control sections 9 compressed air supply sources

Claims (2)

[Scope of utility model registration request] 1. A recovery path having a tapered recovery port for removing the punching tip, which is punched from a punching material and attached to the tip of the punch protruding from the die, by vacuuming to remove the punching tip from the tip of the punch. The die is connected to the plunge hole.
Compressed air from the upper side of the recovery port at the tip of the punch protruding from
Open the air blowing port around the punch,
A punching tip collecting mechanism of a punching device, characterized in that a blowing port is connected to a compressed air supply source . 2. A punching material is punched out and protruded from a die.
Vacuum the punching tip attached to the tip of the punch
The tapered recovery port for stripping and recovering from the tip of the punch
The recovery path provided is connected to the die entry hole,
Compressed air is returned to the recovery port along the punch protruding from
A curved flow control part that allows the recovery port to be surrounded by the recovery port.
And a curved air flow control unit connected to a compressed air supply source.
A punching of a punching device characterized by facing the spray port
Chip collection mechanism.