JPH0744341Y2 - Air blow mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to improvement of an air blow mold suitable for, for example, a turret punch press.

(Prior Art) A turret punch press is used, for example, when mass-producing parts for forming holes of various sizes on a plate-shaped member. For example, as described in JP-A-60-261630, various kinds of punches and dies are attached to the upper turret and the lower turret respectively, and a desired set of punches and dies rotates each turret. As a result, it is positioned directly below the striker. On the other hand, the machined part of the part to be machined is also positioned at the position of the striker, and hole machining is performed.

Since all of these operations are automatically operated by a numerical controller, they are extremely efficient and highly accurate, but an air blow mold is known, for example, from Japanese Utility Model Publication No. 61-1945.

That is, this die has a punch body in which a tip portion having a diameter smaller than that of the base portion is projectingly provided at one end of the base portion, and a punching body provided with a cutting edge, and a punch body into which the punch body is inserted and which is vertically movable. It is composed of a guide body. In addition, this punch guide body is provided with an insertion hole for inserting the punch guide body on the side of the tip end portion thereof, and when the tip end portion is inserted, between the base portion and the tip end portion of the punch body and the inner circumference of the punch guide body, An airtight chamber is formed. Furthermore, the tip of the punch body is provided with an ejection port for compressed fluid which is in communication with the airtight chamber through a communication hole.

The airtight chamber is narrowed due to the lowering of the punch body, and a device for supplying lubricating oil in addition to the compressed fluid is required. For this reason, it is inevitable that the device becomes complicated, and simplification thereof has been demanded. Generally, in an air blow mold, a punch body is configured to be fastened and held by a punch fastening bolt made of a hexagon socket head bolt at a lower portion of a punch base body formed in an axial shape. Further, the punch fastening bolt is adapted to be tightened and loosened through an operation hole provided on the upper portion of the punch base body and used as, for example, a screw hole for suspension.

Therefore, the inventor provided a supply hole penetrating the punch fastening bolt through the punch fastening bolt and communicating this with the airtight chamber to form an oil mist supply path by compressing and spraying the oil mist. Tried to lubricate.

However, since the punch fastening bolt was provided with a supply hole, in order to supplement the strength, it was decided to use a bolt of a standard one rank higher in diameter than the conventional one. However, along with this, the hexagonal hole also becomes large, and the operating tool cannot pass through the conventional operating hole, which causes a problem that tightening cannot be performed.

The conventional operation hole has an inner diameter with almost no margin compared to the operation tool of the punch fastening bolt having no supply hole.

(Problems to be Solved by the Invention) As described above, the punch fastening bolt in the air blow mold is provided with the oil mist supply hole, which is communicated with the airtight chamber to eject and lubricate the oil mist together with the compressed fluid. In this case, it is necessary to make the punch fastening bolt larger in diameter than the conventional one, and the operating tool for the punch fastening bolt becomes large, and it is difficult to operate the punch fastening bolt through the operating hole of the general mold.

On the other hand, making the operation hole large loses compatibility with other molds, so that there is an inconvenience that a punch fastening bolt having a supply hole cannot be attached to a general mold after all.

The present invention has been made to solve the above-mentioned inconvenience, and provides an air blow mold having a hole for supplying oil mist, maintaining sufficient strength, and a punch fastening bolt operable through a conventional operation hole. The purpose is to do.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the air blow mold of the present invention is provided with a tip portion having a diameter smaller than the base portion at the lower end of the base portion and a cutting blade at the tip portion. The formed punch body, the punch base body which holds the punch body at the lower end by the punch fastening bolts and has an operation hole for operating the punch fastening bolts at the upper end portion, and the punch body is inserted to guide the punch body up and down and to the lower end. A punch guide body having an insertion hole through which the tip portion can be inserted is provided, and when the tip portion is inserted into the insertion hole, an airtight chamber is formed by the base portion and the tip portion of the punch body and the inner peripheral surface of the punch guide body. Is an air blow mold for ejecting a compressed fluid from the tip by inserting the tip into the insertion hole, the fluid is an oil mist, and the punch fastening bolt is This hexagon socket is a bolt with a square hole and has the maximum standard size that can be operated through the above operation hole.The threaded portion is a standard screw with a diameter larger than the standard screw corresponding to the above hexagonal hole, and the supply hole that penetrates vertically The punch body is provided with a communication passage, one end of which is connected to the supply hole and the other end of which is opened to the airtight chamber and through which oil mist supplied from the supply hole is passed to the airtight chamber. I am trying.

(Operation) In this invention, the punch fastening bolt is provided with a supply hole, and the threaded portion is made large in diameter to maintain necessary strength, and the size of the hexagonal hole is not set to the standard size corresponding thereto, and the operation hole is formed. Since the maximum standard size through which the operating tool passes is adopted, the punch fastening bolt can be tightened through the operating hole of the conventional size.

Further, the oil mist supply passage is formed by the supply hole provided in this and the communication passage provided in the punch body, and the oil mist supplied through this to the airtight chamber is compressed and ejected, so that the lubricating oil can be simply structured. Is supplied.

(Embodiment) Hereinafter, details of the present invention will be described with reference to an embodiment shown in FIGS. 1 to 6.

This air blow mold is used by being attached to the turret punch press described in the conventional example, and FIG. 1 shows the upper die attached to the upper turret. Since the lower mold is the same as a generally known one, its illustration is omitted.

By the way, this mold has a punch body 1 and a punch base body 3.
The punch tightening bolt 5, the punch guide body 9, the spring body 11 and the oil mist supply path 13.

Then, the punch body 1 is moved up and down by being guided by the punch guide body 9 fixed to the turret (not shown), punching is performed, and the oil mist 15 is supplied from the oil mist supply passage 13, and lubrication is performed by the ejection of the oil mist 15. It has become so.

First, the punch body 1 is composed of a base portion 1a and a tip portion 1b projecting from a lower surface of the base portion 1a and having a diameter smaller than that of the base portion 1a. A cutting edge 1d is provided on a lower end outer circumference 1c of the tip portion 1b. There is.

The punch base body 3 is composed of a trunk portion 3a having a flange formed at the lower end and a head portion 3b attached to the upper end thereof. A punch body 1 is attached to a flange portion of the trunk portion 3a by a punch fastening bolt 5, which will be described later, and a mounting hole having a counterbore for this attachment penetrates through the center portion.

The head portion 3b is made of a disk-shaped member and is attached so as to cover the head portion of the trunk portion 3a. Further, an operation hole 7 formed of a screw hole is provided so as to penetrate the central portion thereof. This is for lifting and moving the entire die or for tightening the punch fastening bolts 5, for example, the sixth die.
The moving means 7a is attached as shown in the figure. Further, the operation hole 7 also serves as an inflow hole for receiving the oil mist 15. Furthermore, the outer peripheral portion of the lower surface is the upper spring seat 7b of the spring body 11.

The punch fastening bolt 5 is composed of a hexagon socket head bolt for fastening the trunk portion 3a and the punch body 1 and has an operating hole 7a.
Insert the rod spanner from and tighten and loosen.
In addition, a supply hole 13a, which is a part of an oil mist supply passage 13, which will be described later, is provided at the center of the supply hole 13a. Moreover, the punch tightening bolt 5 is formed to have a special size, and the details thereof will be described later.

The punch guide body 9 includes a cylindrical guide portion 9a, a flange-shaped upper lid portion 9b that closes the upper end opening thereof, and a lower lid portion 9c that closes the lower end opening. The guide portion 9a guides the punch body 1 so as to be able to move up and down, and also has a key groove 9d provided on the side wall and a sliding key attached to the trunk portion 3a and the base portion 1a.
9e prevents the punch body 1 from rotating undesirably.

In addition, the upper lid 9b has a through hole 9f formed at the center for allowing the trunk 3a to move up and down, and the upper surface has a lower spring seat of the spring body 11.
It is 9g. The flange portion of the ascending punch trunk body 3 contacts the lower surface to regulate the upper limit position of the punch body 1.

Further, the lower lid portion 9c covers the lower end surface of the guide portion 9a, and the concentric insertion hole through which the tip portion 1b of the punch body 1 can be inserted and projected.
It has 9h.

Then, when the punch body 1 descends and the tip portion 1b enters the insertion hole 9h, the airtight chamber 9i is formed by the base portion 1a and the tip portion 1b and the inner peripheral surface of the punch guide body 9. .

The spring body 11 is composed of a plurality of disc springs 11a,
The punch body 1 is lowered by a hitting element (not shown) to perform a predetermined punching process, and then the punch body 1 is returned to a predetermined position following the rise of the hitting element.

Next, the oil mist supply passage 13 will be described. This is the above-mentioned supply hole 13 passing through the center of the punch fastening bolt 5.
a, a void 13b formed under the fastening screw, and this void
It is composed of a plurality of communication holes 13c extending outward from 13b and a plurality of communication grooves 13d extending downward along the outer surface of the base 1a and opening to the airtight chamber 9i.

The void 13b, the communication hole 13c, and the communication groove 13d form a communication passage 13e.

With these, one end is opened at the upper end portion of the punch fastening bolt 5 and the other end is connected to the airtight chamber 9i to form the oil mist supply path 13, and the oil mist 15 sent from the inflow hole which is the operation hole 7 is gas. You are led to the closed room 9i.

Incidentally, 13f is a drain of the oil mist 15 at the upper position of the punch body 1.

Now, the punch fastening bolt 5 described above will be further described. The punch fastening bolt 5 is formed in a special dimension that is out of the standard. That is, as shown in FIGS. 3 and 4, the size of the tightening hexagonal hole 5b is formed in the screw portion 5a by one rank smaller than the size defined by the standard. For example, the opposite side distance w should be 12 mm with respect to the screw diameter, but it is formed to be 10 mm.

As shown in FIG. 5, when the punch fastening bolt 5 is tightened or loosened, the rod spanner 5c is inserted through the operation hole (hanging hole) 7 and operated. In this embodiment, as described above, the punch fastening bolt 5
Since the supply hole 13a is provided in the above, a bolt having a larger diameter than that of the conventional one is used to compensate for the decrease in strength due to this.

On the other hand, since the operation hole 7 is set to a size with almost no allowance for the insertion of the bar spanner used for the conventional thin punch fastening bolt of the supply hole 13a, the punch with the thick screw diameter standard as in this embodiment is used. A thick bar spanner corresponding to the fastening bolt 5 cannot be used.

Therefore, in order to have commonality with other molds, the inner diameter of the conventional operation hole 7 cannot be changed. Therefore, the size of the hexagonal hole 5b is the maximum standard size that can be operated through the operation hole 7,
The screw portion 5a came to use a special punch fastening bolt 5 having a required strength and a standard size.
By adopting the punch fastening bolt 5, the invention can be easily applied to other molds.

Next, the operation will be described. Assembling Punchbody 1,
When operating the punch fastening bolt 5 for adjustment, replacement, etc., the rod spanner 5c is inserted from the operation hole 7 and operated. When the die is used, when the punch body 1 is lowered by lowering the striker while the oil mist 15 is being supplied from the operation hole 7, the tip portion 1b is inserted into the insertion hole 9h and the airtight chamber 9i is formed. . When the punch body 1 is further lowered, the airtight chamber 9i is narrowed and the oil mist 15 is compressed. Then, it descends further and punching ends, and at the same time the oil mist 15
Is sprayed from the lower end outer circumference 1c of the tip 1b, and the lubricating oil is supplied.

[Effect of the Invention] As described in detail above, the present invention is a special punch fastening bolt having a threaded portion having a necessary strength and a hexagonal hole sized to be operated through a conventional preset operation hole. Since the oil mist supply hole is provided in this structure, it is possible to perform lubrication by jetting the oil mist despite the simple structure, and it is possible to widely apply it to existing seed molds. it can.

Thus, lubrication of the side surface of the punch blade prolongs the service life, and lubrication of the punch guide and turret hole can prevent seizure and galling.

[Brief description of drawings]

FIG. 1 is a sectional view showing the construction of an embodiment of the present invention, and FIG.
1 is a bottom view of FIG. 1, FIG. 3 is a front view of a punch fastening bolt, FIG. 4 is a plan view of FIG. 3, FIG. 5 is a sectional view for explaining the action of the punch fastening bolt, and FIG. 6 is an operation hole. It is operation explanatory sectional drawing. 1 …… Punch body 1a …… Base part 1b …… Tip part 1d …… Cut blade 3 …… Punch base body 5 …… Punch fastening bolt 5a …… Screw part 5b …… Hexagonal hole 7 …… Operating hole 9 …… Punch guide Body 9h ...... Insertion hole 9i ...... Airtight chamber 13 ...... Oil mist supply hole 13a ...... Supply hole 13e ...... Communication passage

Claims (1)

[Scope of utility model registration request] 1. A punch body in which a tip portion having a diameter smaller than that of the base portion is provided at a lower end of the base portion and a cutting blade is formed at the tip portion, and the punch body is held at a lower end by a punch fastening bolt and a punch fastening bolt is operated at an upper end portion. And a punch guide body having an operation hole for insertion and a punch guide body having the punch body inserted therein for guiding the punch body up and down and having an insertion hole at the lower end through which the tip portion can be inserted. An air blow mold that forms a hermetic chamber with the base and tip of the punch body and the inner peripheral surface of the punch guide body when the part is inserted, and ejects a compressed fluid from the tip by inserting the tip into the insertion hole. The fluid is oil mist, the punch fastening bolt is a hexagon socket head cap screw, and the hexagon socket has the maximum standard size that can be operated through the operation hole. The threaded portion is a standard screw having a diameter larger than that of the standard screw corresponding to the hexagonal hole and has a supply hole penetrating vertically, and one end of the punch body communicates with the supply hole and the other end is an airtight chamber. An air blow mold characterized in that a communication passage is provided which opens and allows the oil mist supplied from the supply hole to pass through the airtight chamber.