JP2624600B2 - Air blow mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air blow mold used for a turret punch press.

[0002]

2. Description of the Related Art In a conventional turret punch press, an air blow mold is used to blow off dust generated during punching. This air blow mold was a long type used for a thick turret, but a short type used for a thin turret had a thin turret, and was configured to be positioned immediately by a punch body key and a key groove of a turret hole. .

[0003]

However, when such an air blow mold is used for the thin turret,
With the position of the conventional punch body, positioning can be performed by the punch body key and the turret hole key groove, but the oil mist leaks and the oil mist cannot be kept airtight.

Therefore, if the punch body key is provided above the upper turret in order to keep the oil mist hermetically closed, there is a problem that the punch body key comes off from the turret hole key groove.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a punch press having a punch formed at a lower end thereof in a punch guide supported by a hole formed in a punch holder in a punch press. A punch body having a blade portion is provided so as to be vertically movable, and a lower end of a first oil mist passage formed in the punch body and opened at an upper end of the punch body is provided near the lower end of the punch body. A communication hole is provided in the punch guide so as to communicate with a second oil mist passage formed on the peripheral surface of the punch guide, and is capable of communicating the second oil mist passage with a peripheral groove formed on the peripheral surface of the punch guide. In the air blow mold
A punch guide key engageable with a key groove formed in a hole of the punch holder is provided on an outer peripheral surface of the punch guide below the peripheral groove, and a punch formed on the punch guide at a position above the peripheral groove. A punch body key engageable with the guide key groove is provided on the punch body, and a seal member is provided on an upper end of the punch body.

[0006]

By employing the air blow mold of the present invention, the oil mist supplied from the striker is sealed by the action of the sealing member and introduced into the first oil mist passage. Through the mist passage, it is ejected to the lower side of the punch through the outside of the punch body, the outer periphery of the guide, and the side surface of the punch edge, and lubrication of the sliding portion and the side surface of the punch edge, punch residue, and the like are removed. At this time, since the key provided on the punch guide is fitted into the turret hole key groove, the punch guide is smoothly moved up and down the turret hole. Further, since the key provided on the punch is fitted into the key groove of the punch guide, the punch is smoothly moved up and down in the punch guide. Therefore, the punch and the punch guide are positioned by the punch guide and the turret, respectively, and moved up and down while keeping the oil mist hermetically sealed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view of an air blow mold of the present invention. As shown in FIG. 1, for example, a punch guide 7 of an air blow mold 5 is fitted in a hole 3 formed in an upper turret 1 as a punch holder in a turret punch press so as to be movable up and down.

The punch guide 7 is formed in a cylindrical shape having an open upper end. A punch body 9 which is a part of a punch is fitted inside the punch guide 7 so as to be able to move up and down. An opening 13 through which a punch blade 11 formed at the lower end of the body 9 passes is formed. When the punch body 9 is lowered, the punch blade 11 projects below the opening 13.

At the upper end of the punch body 9, a punch head 15 having an upper surface coinciding with the upper end surface is screwed to the punch body 9. A shallow divergent groove 17 is formed at the top of the punch head 15, and the groove 17 is filled with a sealing member 19 made of, for example, a soft rubber.
A flange 21 </ b> A is provided at an upper end of the punch head 15. A tapered portion 21B is formed on the outer periphery of the trunk portion of the punch head 15, and a flange 22 having a tapered hole fitted with the tapered portion 21B is mounted. A return spring 25 is provided between the flange 22 and a spring support 23 integrated on the upper part of the punch guide 7.
The punch body 9 is held at a position where the punch blade portion 11 retreats into the opening 13 except during punching.

The punch head 15 of the punch body 9 is hit with a striker 27 provided for a punch press, and a plate material W sandwiched between a die 29A mounted on a lower turret 29 is punched.

The spring body 23 is provided on the punch body 9.
Is provided. One turret hole keyway 33 is formed over the entire height of the turret 1. A single punch guide key groove 35 is formed in the upper part of the punch guide 7 in the longitudinal direction, and a punch body key 37 provided on the punch body 9 is fitted into the punch guide key groove 35. I have.

A first part for injecting oil mist in the axial direction of the center of the punch body 9 from below the top to the bottom thereof.
An oil mist passage 39 is opened, and a plurality of second oil mist passages 41 are opened directly below the punch guide key groove 35 from the first oil mist passage 39.

The upper edge of the second oil mist passage 41 is provided immediately below the lower edge of the punch guide key groove 35. One groove 43 is provided over the entire circumference at a position where the second oil mist passage 41 is in contact with the wall surface of the punch guide 7, and a communication hole 45 communicating with the second oil mist passage 41 is formed. Second oil mist passage 41
When the oil mist communicates with the groove 43 through the communication hole 45, the oil mist passes through the first oil mist passage 39, passes through the communication hole 45 from the second oil mist passage 41, and passes through the groove 43,
Oil mist is supplied to the turret hole and the sliding part on the outer periphery of the guide. The turret hole keyway 33 is provided in the upper turret 1.
And a punch guide key 47 fixed to the punch guide 7 is fitted.

The first oil mist passage 39 is further connected and opened to a space 49 formed between the first oil mist passage 39 and the punch guide 7.

At the time of punching, the striker 27 which comes into contact with the punch head 15 provided on the upper end of the punch body 9 of the upper turret 1 has an oil mist at a position corresponding to the first oil mist passage 39 of the punch body 9. Passage 3
9A is formed, and the other end of the passage 39A is connected to the oil mist supply device 51.

Therefore, when the striker 27 abuts against the punch head 15, the leakage of the oil mist is prevented by the action of the seal member 19, and the first oil mist passage 39 and the oil mist passage 39A are connected to each other to supply the oil mist. The compressed oil mist sent from the passage 51 can reach the space 49 formed below the punch body 7 via the first oil mist passage 39 in the punch body 9.

When the punch body 9 descends, the punch blade 11
An oil mist spout 50 as shown in FIG. 2 is provided at the lower end of the punch guide 7 through which the air passes.

Since this embodiment is configured as described above, it operates as follows.

The striker 27 is lowered and the workpiece W
When the striker 27 first contacts the punch head 15 provided at the upper end of the punch body 9, the compressed oil mist from the oil mist supply device 51 causes the first oil in the passage 39 A and the punch body 9 to be punched out. The air is supplied to a space 49 formed below the punch body 9 through the mist passage 39 and the second oil mist passage 41.

Further, the compressed oil mist is ejected from the space 49 through an oil mist ejection port 50 at the end of the mold, and the workpiece W
The surface of the workpiece W contacting at least the lower surface of the punch guide 7 is cleaned, and the lubrication of the punch edge is performed.

When the striker 27 descends, the punch body 9 in contact with it falls while being pressed, and the punch guide 7 also descends while being pressed by the return spring 25.

On the other hand, the punch body 9 is
After the end of the lowering, the punch 27 is pressed by the striker 27 and continues to lower. As described above, the punch blade 11 at the tip moves down in the opening 13 and is held between the die 29A supported by the lower turret 29. Punching is performed on the processed workpiece W.

Next, when the oil mist flows down via the first oil mist passage 39, the oil mist lubricates the guide from the second oil mist passage 41 through the communication hole 45 and the groove 43 as described above. . However, since the upper edge of the second oil mist passage 41 is provided below the punch guide key groove 35, the oil mist does not leak from the punch guide key groove 35, and the oil mist is kept hermetically sealed.

Further, the punch guide key 37 is fitted into the turret hole key groove 33 separately from the punch body key 37, and the die is positioned at two positions of the punch and the guide and the guide and the turret. Can be.

[0026]

As will be understood from the above description of the embodiment, in short, the present invention is characterized in that a punch guide is supported by a hole formed in a punch holder in a punch press so as to be able to move up and down, and a lower end portion is provided. A punch body having a punch blade portion is provided so as to be vertically movable, and the lower end of a first oil mist passage formed in the punch body and opened at the upper end of the punch body is moved near the lower end of the punch body. A communication hole is provided in the punch guide so as to communicate with a second oil mist passage formed on the peripheral surface of the body, and allows communication between the second oil mist passage and a peripheral groove formed on the peripheral surface of the punch guide. A punch guide key engageable with a key groove formed in a hole of the punch holder, the punch guide key being located below the peripheral groove. A punch body key provided on the outer peripheral surface and engageable with a punch guide key groove formed in the punch guide at a position higher than the peripheral groove; and a seal member is provided on an upper end portion of the punch body. It becomes.

Therefore, according to the present invention, the positioning of the punch guide relative to the punch holder is performed via the punch guide key, and the positioning of the punch body is performed relative to the punch guide via the punch body key. Then, lubrication between the inner surface of the punch guide and the punch body is performed by the oil mist in the second oil mist passage, and lubrication between the outer peripheral surface of the punch guide and the punch holder is performed by the oil mist that has passed through the communication hole.

Further, when the oil mist is supplied from the striker to the first oil mist passage, the leakage of the oil mist is suppressed by the seal member, and the supply is performed efficiently.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an air blow mold of the present invention.

FIG. 2 is a bottom view of an end face of an air blow mold.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 upper turret 5 air blow mold 7 punch guide 9 punch body 29 lower turret 33 turret hole key groove 35 punch guide key groove 37 punch body key 39 first oil mist passage 41 second oil mist passage 47 punch guide key

Claims (1)

(57) [Claims] 1. A punch body (9) having a punch blade (11) at a lower end in a punch guide (7) supported up and down by a hole (3) formed in a punch holder of a punch press. ) Is provided so as to be vertically movable, and a lower end of a first oil mist passage (39) formed in the punch body (9) and opened to an upper end of the punch body (9) is connected to a lower end of the punch body (9). The second oil mist passage (4) formed on the peripheral surface of the punch body (9) near the portion
A communication hole (45) is provided in communication with the punch guide (1), and is capable of communicating the second oil mist passage (41) with a peripheral groove (43) formed on the peripheral surface of the punch guide (7). In the air blow mold provided in (7),
Keyway (33) formed in hole (3) of the punch holder
A punch guide key (47) that can be engaged with the punch guide (7) is provided on the outer peripheral surface of the punch guide (7) below the peripheral groove (43), and the punch guide key (7) is located above the peripheral groove (43). ) Formed on the punch guide keyway (3)
An air blower characterized in that a punch body key (37) engageable with the punch body (9) is provided on the punch body (9), and a seal member (19) is provided on an upper end of the punch body (9). Mold.