KR20100103319A - Press mold for punching pipe - Google Patents

Abstract

Pipe punching press mold according to the present invention by forming the cut portion of the punch and die for notching or piercing the pipe at an obtuse angle to easily extend the life of the punch and die, and punched from the inside of the pipe to the outside diameter of the pipe In the punching press for pipe punching, which consists of notching or piercing a pipe in order to easily maintain the precision, a die plate is provided on the upper part of the lower holder, and a die having a punch hole is formed on the upper part of the die plate. The slide punch plate is installed, the lower holder and the die plate, the elastically supported by the lower elastic member installed in the die is installed to be moved up and down by the lower bolt, the punch is installed in the fly punch plate, the upper holder The upper plate is installed at the bottom of And a pad elastically supported by the upper elastic member installed on the upper plate to be movable up and down by the upper bolt, and a punch pressing plate for pressing the slide punch plate to be installed on the upper plate. The pipe is disposed between the pads and the punch is disposed in the hollow portion of the pipe.

Description

PRESS MOLD FOR PUNCHING PIPE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press mold for pipe punching, and in particular, to easily prolong the life of the punch for notching or piercing the pipe and to punch the pipe from the inside to the outside to easily maintain the inner diameter precision of the pipe. It relates to a press mold for processing.

In general, a groove is formed at the end of the pipe or a plurality of holes are formed in the pipe. Thus, in order to notch or pierce the pipe, many molds are used.

Thus, as shown in Fig. 5, in the conventional mold for forming a hole in the pipe 101, a punch 102 is disposed on the outer surface of the pipe 101, and the hole (corresponding to the punch 102) ( The die 103 with 103a is disposed inside the pipe 101.

In order to perform a piercing or notching process on the pipe 101 with the conventional mold formed as described above, the die 101 is inserted into the pipe 101 and then the pipe 101 is processed using the punch 102. Done.

However, in the conventional mold, since the punch is disposed on the outer surface of the pipe and a die having a hole coinciding with the punch is disposed inside the pipe, the cut portion between the punch and the die forms an acute angle, and accordingly There is a disadvantage in that the cut portions of the punch and die can be easily broken, so the life of the punch is very short.

In addition, since the punch notches or pierces the pipe as it progresses from the outside to the inside of the pipe, burrs generated during the punching operation are formed inside the pipe, which is inconvenient to remove the burrs, and it is difficult to maintain the inner diameter precision of the pipe. The disadvantage is that it is difficult.

The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to form a cut portion of the punch and die for notching or piercing the pipe at an obtuse angle, to facilitate the life of the punch and die The present invention provides a press mold for pipe punching which can be extended and punched from the inside of the pipe to the outside to easily maintain the inner diameter precision of the pipe.

In order to achieve the above object, the present invention is a pipe punching press mold consisting of notching or piercing the pipe, the die plate is provided on the upper portion of the lower holder, the die forming the punch hole is the die A slide punch plate installed on the upper part of the plate and elastically supported by the lower holder, the die plate, and the lower elastic member installed on the die is installed to be movable up and down by the lower bolt, and the punch is mounted on the fly punch plate. The upper plate is installed in the lower portion of the upper holder, the pad elastically supported by the upper elastic member is installed on the upper plate is installed to be moved up and down by the upper bolt, the punch pressing plate for pressing the slide punch plate This includes being installed on the upper plate In addition, a pipe is disposed between the die and the pad and a punch is disposed in the hollow portion of the pipe.

The punching press mold for pipe punching according to the present invention is fixed to the outside of the pipe with a die and a pad, and a notch or piercing the pipe with a punch disposed in the hollow part of the pipe, so that the cut portions of the punch and the die are obtuse. There is an advantage that the breakage of the punch and the die does not occur easily by forming a.

In addition, since the punch proceeds from the inside of the pipe to the outside, notching or piercing the pipe, burrs generated during the punching operation are formed on the outside of the pipe, and the removal of the burrs is very convenient. There is an advantage that the punching process can easily maintain the inner diameter precision of the pipe.

DETAILED DESCRIPTION Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing an example of a press punch for pipe punching process according to the present invention, Figures 2 and 3 is a view showing another example of the press punch for pipe punching process according to the present invention, Figure 4 is As a figure for explaining the press die for punching a pipe, the metal mold | die of this invention is a structure which notches or pierces a pipe.

That is, the lower plate 1 is provided with a die plate 2, a die 3, a slide punch plate 4, a punch 5 is installed in the slide punch plate 4, and an upper holder 6 An upper plate 7, a pad 8, and a punch press plate 9 are provided.

The die plate 2 is provided above the lower holder 1, and the die 3 has a punch hole 3a and is provided above the die plate 2.

The slide punch plate 4 is elastically supported by the lower elastic member 11 installed on the die 3 and is installed to be movable up and down by the lower bolt 12.

Of course, the lower elastic member 11 and the lower bolt 12 may be formed in plural, and the lower elastic member 11 may be disposed on the circumferential surface of the lower bolt 12.

In any case, the punch 5 is firmly installed in the fly punch plate 4, and the tip of the punch 5 coincides with the punch hole 3a of the die 3 to punch the pipe 10. Notching and piercing

Meanwhile, an upper plate 7 is installed below the upper holder 6, and a pad 8 is installed on the upper plate 7 so as to be elastically supported by the upper elastic member 13 and the upper bolt 14. It is installed so as to be movable up and down, the punch pressing plate 9 for pressing the slide punch plate (4) is to be installed on the upper plate (7).

Of course, the upper elastic member 13 and the upper bolt 14 may also have a plurality of lower elastic members 11 like the upper bolt 12, and the upper elastic member 13 may have a lower bolt 14. It may be disposed on the circumferential surface of the.

In particular, in the present invention, the pipe 10 is disposed between the die 3 and the pad 8 and fixed by the pressing action of the pad 8, and the punch 5 is disposed in the hollow portion of the pipe 10. The pipe is notched or pierced by the punching action of the punch 5.

Of course, in the present embodiment, the pipe 10 is notched by the punch 5 as shown in FIG. 1, or the pipe 10 is pierced by the punch 5 as shown in FIGS. 2 and 3, and slides as shown in FIG. 2. The punch 5 may be installed in the punch plate 4 as it is, and the punch 5 may be fixed to the slide punch plate 4 by the bolts 5a as shown in FIG. 3, and FIGS. 2 and 3. As shown in the drawing, the piece cut from the pipe 10 is preferably lowered through the punching hole 3a formed in the die 3.

Pipe punching press mold according to the present invention made as described above is installed in a press (not shown) to notching or piercing the pipe 10.

That is, the pipe 10 is placed between the die 3 and the pad 8, and when the press is operated, the upper holder 6 is lowered and the pipe 10 is first fixed by the die 3 and the pad 8. do.

If the upper holder 6 is continuously lowered, the slide punch plate 4 is lowered by the punch press plate 9, and the punch 5 is lowered in conjunction with the punch 10 to punch the pipe 10.

Then, in the present invention, since the punch 5 is operated from the inside of the pipe 10 to the outside, not only the burr is generated on the outer surface of the pipe 10, but also the internal diameter precision of the pipe can be easily maintained. As described above, the cut portions of the punch 5 and the die 3 form an obtuse angle, so that the strength of the cut portions of the punch 5 and the die 3 is strengthened and not easily broken.

1 is a cross-sectional view showing an example of a press die for punching pipe according to the present invention.

2 and 3 are cross-sectional views showing another example of a press die for punching pipe according to the present invention.

Figure 4 is a cross-sectional view for explaining the press mold for punching the pipe according to the present invention.

Fig. 5 is an excerpt sectional view illustrating a press punch for pipe punching processing according to the related art.

* Description of the symbols for the main parts of the drawings *

4: Slide Punch Plate

5: punch

8: pad

Claims (1)

In the punching press for pipe punching process consisting of notching or piercing a pipe, A die plate is installed on an upper portion of the lower holder, a die having punch holes is installed on an upper portion of the die plate, and a slide punch plate elastically supported by the lower holder, the die plate, and a lower elastic member installed on the die is provided. A pad is installed to be movable up and down by a lower bolt, a punch is installed on the fly punch plate, an upper plate is installed below the upper holder, and a pad elastically supported by an upper elastic member installed on the upper plate. It is installed so as to be movable up and down by a bolt, including the punch pressing plate for pressing the slide punch plate is installed on the upper plate, A press mold for punching pipes, wherein a pipe is disposed between the die and the pad, and a punch is disposed in the hollow portion of the pipe.

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