KR20000036822A - Metal pipe embossing projection forming device - Google Patents

Abstract

PURPOSE: A device is provided to continuously form an embossing protrusion in an outer circumference by using an existing pipe. CONSTITUTION: An embossing protrusion(4a) on a pipe(4) is completely formed by advancing a plunger(10) and by coming off all of a punch(5) accepted inside a hollowed hole(3a) of a core(3).The plunger(10) is returned to an early state by re-driving of a second driving device(11). When a front end of the plunger(10) is composed of a permanent magnet, the punch come off from the hollowed hole(3a) is pulled toward an inserting slot by the front end of the plunger(10) and is accepted inside the hollowed hole(3a). Thereby the embossing protrusion(4a) easily removes the formed pipe(4) from the core(3) in an after-processing.

Description

Apparatus for forming embossing protrusions of metal pipes {.}

The present invention relates to an embossing protrusion forming apparatus of a metal pipe, and more particularly to an embossing protrusion forming apparatus of a metal pipe for automatically forming an embossing protrusion having a specific shape on an outer circumferential surface by using a pipe produced at a pipe forming factory. It is about.

In general, commercially available metal pipes are widely used for passage roles, structures, and the like due to the transfer of various liquids and gases.

In particular, the pipe used for the scaffolding of the structure is more convenient when forming an embossing protrusion that acts as an anti-slip on the outer circumferential surface, but until now, an apparatus for forming an embossing protrusion on the outer circumferential surface of the pipe has not been developed. Protrusions are formed on the outer circumferential surface of the rotating roller to form only the recessed grooves, which is not suitable for use in desired applications.

Therefore, since the embossing protrusions are formed on the plate-like sheet and then rolled into a cylindrical shape, as in the manufacturing process of the pipe, much effort has been devoted to manufacturing the pipe having the embossing protrusions. When speaking into an image, the embossing protrusions are not folded to form a cylindrical shape, which is not realized.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem in the related art, and an object thereof is to provide an apparatus capable of continuously forming an embossing protrusion on an outer circumferential surface by using a pipe that is already shipped.

According to an aspect of the present invention for achieving the above object, a frame serving as a support frame, the core is fixed to the frame and the insertion hole is formed in the center in the axial direction, the core has a myriad of holes formed in the outer peripheral surface, A punch installed in the through hole to form an embossing projection on the outer circumferential surface of the pipe; a separation preventing means for preventing the punch from being separated from the through hole of the core; The casing includes a casing having a through hole coincident with a through hole formed in the core, first driving means for opening the casing in a right angle direction in the axial direction, and a punch in the perpendicular direction in the axial direction while moving forward and backward along the insertion hole of the core. Comprising a plunger for pushing and a second drive means for moving the plunger forward and backward. The embossing of the metal pipe forming apparatus according to Gong, is provided.

1 is an exploded perspective view showing the main part of the present invention

2A and 2B are longitudinal cross-sectional views showing the configuration of the present invention;

Figure 2a is a state in which the unmolded pipe is inserted between the casing and the core

Figure 2b is a state in which the punch contained in the through hole of the core in the advance of the plunger and the embossed projections are formed in the pipe sequentially

3 is a right side view of FIG. 2A

Figure 4 is a state in which the casing is formed to be divided out in the state in which the molding of the pipe is completed

5 is a perspective view of a pipe shaped by the present invention

Explanation of symbols for main parts of the drawings

1 frame 2 insertion hole

3: core 3a, 7a: through hole

5: punch 6: space part

7: casing 8: first drive means

10 plunger 11 second driving means

Hereinafter, with reference to Figures 1 to 5 showing an embodiment of the present invention in more detail as follows.

1 is an exploded perspective view showing the main part of the present invention, Figures 2a and 2b is a longitudinal cross-sectional view showing the configuration of the present invention and Figure 3 is a right side view of Figure 2a, the present invention is a frame 1 that serves as a support frame An insertion hole 2 is formed in the axial direction, and a core 3 having an infinite number of through holes 3a is fixed to the outer circumferential surface thereof, and inside the through holes 3a formed in the cores 3 of the pipe 4. The punch 5 which forms an embossing projection in the outer peripheral surface is provided so that the punching out is possible.

The tip of the punch 5, which is installed in the through hole 3a of the core 3, can be applied in a hemispherical shape, a triangular shape, a star shape, and other specific shapes according to the shape to be formed on the outer circumferential surface of the pipe 4. It is possible to, but has a structure that is not separated from the core 3 by the separation preventing means.

In one embodiment of the present invention, the separation preventing means is provided with a punch 5 formed of a large diameter portion 5a and a small diameter portion 5b, and close to the insertion hole 2 side of the core 3 so that the large diameter portion is caught. It consists of a step 3b formed in the through hole 3a, but is formed so that the inner diameter of the through hole 3a on the core 3 is the same, and then a separate cylindrical ring in the insertion hole 2 (not shown). Even though the cylindrical ring serves as a stepped portion, the punch 5 is not necessarily separated from the through hole 3a.

Moreover, it is preferable to comprise so that the punch 5 may not be pulled out more than necessary by closing the through-hole 3a inward as shown to FIG. 2A on the opposite side (outer peripheral surface side of a core) of the step 3b.

This is for easily fitting the pipe 4 for shaping to the outer peripheral surface side of the core 3.

A casing 7 is provided outside the core 3 to form the core 3 and the space 6, and the casing 7 has a through hole 3a of the core 3 on an outer circumferential surface thereof. The through hole 7a is formed in the same direction, and is divided into a plurality of pieces (about 3-4 pieces) so that the embossed projection 4a is formed on the outer circumferential surface of the pipe 4, and then the first driving means 8 makes the axial direction. It is configured to open in the direction perpendicular to.

The first drive means 8 is fixedly installed by a separate structure 9 fixed to the frame 1.

Further, a plunger 10 is provided on the central axis of the core 3 to push the punch 5 in the direction perpendicular to the axial direction while moving forward and backward along the insertion hole 2 of the core 3. The inclined portion 10a is formed at the tip of the plunger 10 and the small diameter portion 5b of the punch 5 to which the plunger 10 is connected is punched in a direction perpendicular to the plunger during the linear movement of the plunger 10. It has a round hemispherical shape so that 5 is moved.

The plunger 10 moves forward and backward along the insertion hole 2 as the second driving means 11 is driven.

In addition, the tip of the plunger 10 for pushing the punch 5 in the direction perpendicular to the axial direction is made of a permanent magnet, and the punch 5 is made of a magnetic material.

This is pushed by the tip of the plunger 10 when the punch 5 is pushed in the direction perpendicular to the axial direction to form the embossed projection 4a on the outer circumferential surface of the pipe 4 and then retracted in advance of the plunger 10. This is to allow the punch 5 to be received inside the through hole 3a so that the pipe 4 on which the embossing protrusion 4a is formed can be easily taken out of the core 3 or the new pipe can be easily inserted into the core. .

On the other hand, the first and second drive means 8 and 11, which are driving sources for moving the casing 7 and the plunger 10 forward and backward, are suitable as necessary among the hydraulic screw, the pneumatic cylinder, and the ball screw rotating in accordance with the driving of the motor. It is understandable to be able to choose and apply.

In an embodiment of the present invention, the core 3, the casing 7, and the plunger 10 are cylindrical, so that the embossing protrusions 4a can be formed on the outer circumferential surface of the cylindrical pipe 4, but these are polygonal. In the case of forming, embossing projections can also be formed on the outer circumferential surface of the polygonal pipe, so the configuration thereof is not particularly limited.

Referring to the operation of the present invention configured as described above is as follows.

First, the plunger 10 driven by the second driving means 11 is separated from the insertion hole 2 of the core 3, and the initial state in which the divided casings 7 coincide with each other, that is, the core 3 The casing 7 and the core 3 are formed as shown in FIG. 2A to form the embossed projection 4a on the cylindrical pipe 4 in the initial state in which the punch 5 is mounted in the through hole 3a. The pipe 4 is pushed into the space 6 formed therebetween.

In this state, when the plunger 10 is advanced by the second driving means 11 to form the embossing projection 4a on the outer circumferential surface of the pipe 4, the inclined portion 10a formed at the tip of the plunger 10 is The punch 5 accommodated in the through hole 3a moves in a direction perpendicular to the movement direction of the plunger 10 because the rounded portion, which is the small diameter portion 5b of the punch 5 exposed to the insertion hole 2 side, is reached. To sequentially exit from the through hole (3a).

At this time, the first driving means 8 must push the casing 7 toward the core 3 side so that the split casing 7 does not open out due to the force applied by the punch 5.

Accordingly, as shown in FIG. 2B, the casing 7 plays a die role, and thus the embossing protrusions 4a are sequentially formed on the outer circumferential surface of the pipe 4.

By the above-described operation, the plunger 10 is fully advanced so that all the punches 5 contained in the through holes 3a of the core 3 come out and the embossing projections 4a are completely formed on the pipes 4. Afterwards, the plunger 10 is returned to the initial state as shown in FIG. 2A by the second drive means 11 again. When the tip portion of the plunger 10 is made of a permanent magnet, The punch (5) that has been pulled out is pulled toward the insertion hole (2) by the tip of the plunger (10) and accommodated inside the through hole (3a). Can be taken out easily.

However, when the distal end of the plunger 10 is not a permanent magnet, the distal end of the punch 5 is inserted into the embossing protrusion 4a. Therefore, the pipe 4 on which the embossing protrusion 4a is formed from the core 3 is removed. It is not easy to pull out a specific operation will be described later.

After the plunger 10 is returned to the initial state, the split casing 7 is opened out as shown in FIG. 4 by the first driving means 8 to remove the molded pipe 4 from the core 3. It becomes possible.

This is because the embossed projection 4a formed on the outer circumferential surface of the pipe 4 is fitted in the through hole 7a of the casing 7.

Therefore, after the casing 7 divided by the first driving means 8 is opened to the outside as shown in FIG. 4, the molded pipe 4 can be removed from the core 3, as described above. ) Is a permanent magnet, and when the retracting operation of the plunger 10 is pulled out by the magnetic force and the punch 5 is accommodated in the through hole 3a, the pipe 4 can be easily pulled out of the core 3. However, if the tip of the plunger 10 does not consist of a permanent magnet, the tip of the punch 5 drawn out from the through hole 3a is accommodated in the embossing projection 4a, and the pipe 4 is pulled out. The pipe 4 does not come off from the core 3.

Accordingly, when the worker rotates the molded pipe 4 slightly while holding the pipe 4 fitted to the core 3, the embossing protrusion 4a in which the punch 5 exposed from the through hole 3a is formed. By being pushed by the basic rounding portion of the inside of the through hole (3a) it is possible to easily remove the pipe (4) from the core (3).

After forming one pipe 4 as described above, the first drive means 8 is driven again to retract the casings 7 which are opened to each other as shown in FIG. It becomes possible to insert a pipe and to carry out the shaping | molding operation of the embossing protrusion 4a continuously.

As described above, the apparatus of the present invention for forming the embossing projections 4a on the outer circumferential surface of the pipe 4 can be controlled by adjusting the length of the core 3, the casing 7, and the plunger 10 without any change in structure. It is understandable to be able to form pipes from centimeters to several meters.

As described above, according to the present invention, the punch 5 may be installed in the through hole 3a of the core 3 so that the casing 7 serving as a die may be opened to the outside of the core 3. Since the embossing protrusions 4a are formed on the outer circumferential surface of the metal pipe 4 by installing and moving the plunger 10, the pipe can be used for various purposes.

Claims (5)

A frame serving as a support frame, a core fixedly mounted to the frame and having an insertion hole formed in an axial direction in the center thereof, a core having an infinite number of through holes formed on the outer circumferential surface thereof, and protruding in the through hole of the core, embossing on the outer circumferential surface of the pipe. A punch to be formed, a separation preventing means for preventing the punch from being separated from the through hole of the core, a casing formed with a plurality of cores and spaces and installed outwardly and having a through hole coinciding with the through hole formed in the core; First driving means for opening the casing in a direction perpendicular to the axial direction, a plunger for pushing the punch in the direction perpendicular to the axial direction while advancing and retracting along the insertion hole of the core, and a second drive for advancing and retracting the plunger Embossing apparatus for metal pipes, characterized in that consisting of means. The method of claim 1, Embossing apparatus for forming a metal pipe, characterized in that the separation preventing means comprises a punch consisting of a large diameter portion and a small diameter portion, and a step formed in the through hole close to the insertion hole side of the core so that the large diameter portion is caught. The method of claim 1, Embossing apparatus for metal pipes, characterized in that the punch is made of a magnetic material and the tip of the plunger is made of a permanent magnet. The method of claim 1, Embossing apparatus for metal pipes, characterized in that the first and second driving means is any one of a hydraulic screw, a pneumatic cylinder, a ball screw rotating in accordance with the drive of the motor. The method of claim 1, An embossing molding apparatus for metal pipes, characterized in that the tip of the punch forming the embossing projection is any one of a hemispherical shape, a triangular shape, and a star shape.