KR20180118930A - Pipe bending device - Google Patents

Abstract

The present invention relates to a pipe bending device to increase productivity by improving a bending structure of the pipe bending device and, more specifically, relates to a pipe bending device which comprises: a base in which an electric device, a gear, a shaft, or the like are embedded to transmit power to the inside; a holding unit fixing a metal pipe after the metal pipe is arranged in an upper portion of the base; a bending unit bending the metal pipe fixated to the holding unit; and a controller controlling each of components installed on the base. The holding unit comprises: a first holder and a second holder; a core unit arranged in the first holder and the second holder; and a cylinder unit connected to the core unit to move the core unit at a predetermined distance. The core unit comprises: a first core and a second core; and an elastic member connecting the first core and the second core.

Description

[0001] PIPE BENDING DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe bending apparatus, and more particularly, to a pipe bending apparatus that improves a bending structure of a pipe bending apparatus to increase productivity.

Generally, hollow hollow pipe is lightweight and has excellent durability, and is widely used as a support frame for various piping lines and structures. At this time, the pipe is bent through a separate pipe bending device to improve the bending accuracy.

Currently, a factory that manufactures pipe bending as its main business involves inserting pipes into the core and then bending the pipe from 10 ° to 120 ° by the operation of the pipe bending part.

At this time, the banding devices currently in use in the banding plant have a plurality of joints so that most of the cores inserted in the pipe are bent together inside the pipe.

However, the conventional core has a problem that the tip end portion of the core is naturally bent downward due to the weight of the joint portion itself before fitting the pipe, so that it is troublesome and difficult for the operator to insert the pipe at the tip portion of the core.

In general, when the pipe is bent, one operator holds the pipe with one hand for each banding device, lifts the tip of the downwardly bent core with the other hand, inserts it into the tip of the pipe, However, since the worker actually puts the pipe at the tip of the core, the time period from several seconds to several tens of seconds has elapsed, resulting in a problem that the productivity is inadequate.

In addition, since the outer surface of the core is generally manufactured by using a synthetic resin or a metal material as a material, frictional force between the inner surface of the pipe and the outer surface of the core becomes considerable during the pipe bending process. The lubricant is applied to the workpiece.

Accordingly, the worker must prepare the work with the other hand while holding the pipe in one hand because the preparation process for bending one pipe is too long, so the worker feels a lot of fatigue and the productivity is not greatly improved .

Reference literature: Korean Patent Publication No. 2011-0038701

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pipe bending apparatus that can minimize the preparation process for the pipe bending process and improve work productivity.

It is a further object of the present invention to improve the structure so that the pipe can be fitted to the tip of the core quickly and precisely and to allow the oil injected from the hydraulic pump to be injected directly onto the surface of the core before the bending process, So that the work can be carried out.

In order to achieve the above-mentioned object, the present invention provides an electric apparatus, comprising: a base having an electric device for transmitting power therein, gears, shafts, and the like; a holding part for holding the metal pipe after the metal pipe is disposed on the base; A bending unit for bending the metal pipe fixed to the holding unit, and a controller for controlling each component provided on the base, wherein the holding unit includes a first holder and a second holder, a first holder and a second holder, 2 holder, and a cylinder portion connected to the core portion to move the core portion a certain distance, wherein the core portion connects the first core and the second core to the first core and the second core And an elastic member.

At least one of the first holder and the second holding is connected to a plurality of lubricant discharge holes, a nozzle coupled to the lubricant discharge hole, and a lubricant storage tank for supplying lubricant to the nozzle.

The first core and the second core include connecting rods respectively connected to both side ends of the elastic member, a resin body formed on an outer surface of the connecting rod, and a sheath formed on the outer surface of the resin body.

The elastic member may be composed of either a compression spring or a tension spring.

The cylinder portion is detachably coupled to one side of the first core through a linkage.

The stopper is configured to limit the insertion distance of the metal pipe.

In addition, the base is provided with a position adjusting device for varying the position according to the size and bending position of the metal pipe.

The first holder is further provided with a friction pad to increase the adhesion with the outer surface of the metal pipe.

The pipe bending apparatus according to the embodiment of the present invention maintains the core always in a horizontal state so as to minimize the preparation process for proceeding the pipe bending process and the oil injected from the hydraulic pump before the bending process is performed on the surface of the core The productivity can be greatly improved by improving the workability.

1 is a perspective view showing a pipe bending apparatus according to an embodiment of the present invention;
FIG. 2 is a plan view of a pipe bending apparatus according to an embodiment of the present invention as viewed from above; FIG.
3 is a side view of a pipe bending device according to an embodiment of the present invention.
4 is an exemplary view showing first and second holder portions of a pipe bending apparatus according to an embodiment of the present invention;
5 is an exploded perspective view illustrating a core portion of a pipe bending apparatus according to an embodiment of the present invention.
FIG. 6 is an exemplary cross-sectional view illustrating a combined state of FIG. 5;
FIG. 7 is a perspective view showing a state where a position adjusting device is installed in a pipe bending apparatus according to an embodiment of the present invention; FIG.
8 to 13 are views showing a state in which the pipe bending apparatus according to the embodiment of the present invention is operated.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

FIG. 1 is a perspective view showing a pipe bending apparatus according to an embodiment of the present invention. FIG. 2 is a plan view of a pipe bending apparatus according to an embodiment of the present invention, 4 is a view illustrating the first and second holder portions of the pipe bending apparatus according to the embodiment of the present invention. FIG. 5 is a side view of the pipe bending apparatus according to the embodiment of the present invention. 7 is a perspective view showing a state in which a position adjusting device is installed in a pipe bending apparatus according to an embodiment of the present invention, and FIG. 8 is an exploded perspective view of the pipe bending apparatus according to the embodiment of the present invention. 13 is an exemplary view showing a state in which the pipe bending apparatus according to the embodiment of the present invention is operated.

1 to 7, a pipe bending apparatus 100 according to an embodiment of the present invention includes a base 10 having an electric device for transmitting power and gears, shafts, etc., and a base 10, A holding part 20 which is installed on the upper part of the metal pipe 60 and fixes the metal pipe 60 so that the metal pipe 60 is not moved during the bending process and the metal pipe 60 fixed through the holding part 20, And a controller (not shown) for controlling the respective components installed on the base 10.

The base 10 is provided with various components for being supplied with power from the outside such as electric devices for receiving electric power when power is supplied, gears and hydraulic cylinders rotated by the electric device, and the like.

A cylinder portion 12 is installed on one side of the base 10 at a central portion of the base 10 and a holding portion 20 and a bending portion 40 are installed on the opposite side of the cylinder portion 12 do.

First, the cylinder portion 12 is disposed on the end side of the base 10, and the piston 13 is configured to be actuated by hydraulic pressure or air pressure.

At this time, the connecting rod 14 is connected to the piston 13 of the cylinder part in a detachable state through welding or a hub.

The connecting rod 14 can be connected to the end of the piston 13 to the position where the metal pipe 60 is bent. However, since the piston rod 14 may be struck by its own weight, And is supported by the supporter 16.

In addition, the stopper 15 is configured to limit the insertion distance of the metal pipe 60 in the connecting rod 14. The stopper 15 is movable along the connecting rod 14 and can be fixed through tightening of the bolt.

The connection unit 14 is connected to the holding unit 20 so that the bending process can be performed while closely contacting with and separating from the outer surface of the metal pipe 60.

The holding part 20 is composed of a first holder 21, a second holder 22 and a core part 27. The first holder 21 and the second holder 22 have semicircular grooves 23 formed therein.

At this time, the friction pads 24 are attached to the semicircular grooves 23 of the first holder 21 in order to increase the frictional force with the metal pipe 60 during the bending of the metal pipes 60, so that slippage does not occur .

The friction pad 24 may be made of a material having high frictional force such as rubber, urethane, sandpaper or the like, and may be attached to all or a part of the inner wall surface of the semicircular groove 23 of the first and second holders.

At least one of the first holder 21 and the second holder 22 is provided with a plurality of lubricant discharge holes 25 and a nozzle (not shown) coupled to the lubricant discharge hole 25 and a lubricant A storage tank 26 is connected.

The lubricating oil filled in the lubricating oil storage tank 26 injects lubrication oil through the nozzle to the surface of the core portion 27 fitted in the metal pipe 60 so that the core portion 27 is connected to the metal pipe 60, Thereby minimizing the frictional force in the process of being inserted or separated.

The reason why the lubricating oil is sprayed onto the surface of the core portion 27 is to smoothly fit the metal pipe 60 into the core portion 27. Particularly after the bending process is performed, So that it can be easily separated from the pipe 60.

The core portion 27 also includes an elastic member 35 connecting the first core 28 and the second core 29 to each other.

The first core 28 and the second core 29 have the same internal structure. The first core 28 and the second core 29 are respectively provided with connecting rods 31 so as not to be separated after the elastic members 35 are connected. The connecting rod 31 may be made of the same material as that of the elastic member 35 or a different material.

One end of the connecting rod 31 to which the elastic member 35 is connected may be provided with a hook or a hook for hooking the end of the elastic member 35 (not shown). The distal end of the connecting rod 14 is inserted into and detached from the connecting rod 31 through bolts.

Also, the resin body 32 may be coupled to the circumferential surface of the connecting rod 31. In the case of the resin body 32, polyethylene may be used as the material, or urethane may be used as the material.

The resin body 32 has a cylindrical shape and has a length such that the connecting rod 31 can be completely embedded.

Further, on the outer surface of the resin body 32, a sheath 33 made of a metal material is tightly fixed to the circumferential surface of the resin body 32. Stainless steel having a smooth surface and excellent corrosion resistance can be preferably used. If the metal material is excellent in corrosion resistance, it is of course possible to employ other materials even if it is not stainless steel.

The elastic member 35 may be a compression spring or a tensile spring. In addition to the high carbon steel, a steel material excellent in corrosion resistance and durability such as silicon manganese steel, chrome steel, crovanadium steel and the like can be employed.

The core portion 27 thus configured is disposed such that the first core 28 is located inside the first holder 21 and the second core 29 is located inside the second holder 22. [

A bending portion 40 is provided on the front side of the first holder 21 at the upper portion of the base 10 so as to bend the metal pipe 60 while winding the metal pipe 60. The bending portion 40 is installed to rotate axially and a pipe guide groove 42 is formed to guide the metal pipe 60 in the process of bending the metal pipe 60 on the outer surface thereof.

That is, when the bending portion 40 is rotated after the metal pipe 60 is inserted into the first holder 21 and the second holder 22, the first holder 21 advances and rotates, Is bent along the pipe guide groove 42 of the bending portion.

More specifically, the pipe guide groove 42 of the bending portion has the same shape and dimensions as the semicircular groove 23 formed in the first holder 21 and the second holder 22. At this time, the first holder 21 is in close contact with the tip end of the pipe guide groove 42 of the bending portion when it is in close contact with the outer surface of the metal pipe 60, (42) and is in close contact with the outer surface of the metal pipe (60).

This is because the first holder 21 is disposed adjacent to the bending portion and moves and rotates at an angle that bends the metal pipe 60 during the bending of the metal pipe 60, Since the second holder 22 plays the role of supporting only the unbendable portion of the metal pipe 60, the second holder 22 faces the second holder 22, This is because it is not necessary to form the pipe guide groove 42 of the bending portion at the viewing position.

As shown in FIG. 7, the base 10 is provided with a position adjusting jig 50 for adjusting the size, bending position, bending angle, and the like of the metal pipe 60.

The position adjusting jig 50 is installed on one side of the base 10, and is used particularly when the metal pipe 60 needs to be bent at least two times.

In other words, when the metal pipe 60 is once bent, the metal pipe 60 is bent by the rotation of the bending portion 40 while the end portion of the metal pipe 60 is closely attached to the stopper 15 The bending position and the bending angle need to be adjusted through the position adjusting jig 50 to be the same as the first bending part. Therefore, the position adjusting jig 50 is required when bending at least twice .

The holding portion 20, the cylinder portion 12, the bending portion 40, the lubricant storage tank 26, and the like are controlled by a controller (not shown) for controlling the respective components installed on the base.

The controller may be separately installed as a box on one side of the base 10 and controlled by an operator's operation.

Hereinafter, the operation of a pipe bending apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

8 and 13, when the metal pipe 60 is sandwiched between the core portions 27 and the bending process is performed, the first holder and the second holders 21 and 22 are all moved forward . The first holder 21 is disposed adjacent to the pipe guide groove 42 of the bending portion and the second holder 22 is previously moved to a state adjacent to the outer surface of the metal pipe 60.

This setting is possible by previously designating the positions of the first holder 21 and the second holder 22 in the control unit.

When the worker holds the metal pipe 60 with both hands and pushes the tip end of the metal pipe 60 between the first holder 21 and the pipe guide groove 42 of the bending portion, the tip end portion of the metal pipe 60 naturally moves And is moved to the position where the stopper 15 is located while being inserted into the first core 28 and the second core 29.

Here, the surfaces of the first core 28 and the second core 29 are in a state in which lubricating oil is injected in advance through the nozzles provided in the first holder 21 or the second holder 22. That is, the lubricating oil can be set so that the lubricant is sprayed toward the core portion 27 from the controller when the positions of the first holder 21 and the second holder 22 are moved to the initial positions.

When the metal pipe 60 is fitted into the core portion 27 and the stopper 15 is inserted into the position where the stopper 15 is located, the controller operates the first and second holders 21 and 21 on the outer surface of the metal pipe 60, (22) is pressed tightly.

Thereafter, when the operator operates the controller, the first holder 21 advances and rotates at the same time as the bending portion 40 is rotated. The second holder 22 strongly presses the outer surface of the metal pipe 60 so as to support the metal pipe 60 so that the bending position and the angle of the metal pipe 60 are precisely adjusted.

At this time, since the first core 28 of the core portion is located inside the metal pipe 60 bending at a certain angle, the elastic member 35 is pulled by the distance moved by the first core 28.

In the case where the bending angle of the metal pipe 60 is to be large, the elastic member 35 uses a tension spring rather than the compression spring in consideration of the strain and the shape restoration ratio. On the other hand, It would be desirable to use fast compression springs.

When the bending of the metal pipe 60 is completed, the cylinder portion 12 is operated to move the connecting rod 14 backward by a predetermined distance to move the core portion 27 coupled with the connecting rod 14 backward.

The reason why the connecting rod 14 is moved backward by a certain distance is to secure a pulling angle so that the first core 28 can be easily separated from the metal pipe 60.

When the core portion 27 is retracted, the first holder 21 and the second holder 22 are retracted and the metal pipe 60 can be easily separated from the core portion 27. In this state, The metal pipe 60 can be easily separated from the core portion 27 by pulling the metal pipe 60 with both hands.

When the second bending operation is to be performed in the metal pipe 60, the position adjusting jig 50 is moved so that the first bending process is performed on the position adjusting jig 50.

Next, the metal pipe 60 is inserted again between the first holder 21 and the pipe guide groove 42 of the bending portion so that the second bending position of the metal pipe 60 is positioned between the first holder 21 and the second holder 22 The second bending process is performed in the same manner as the first bending sequence.

As described above, in the pipe bending apparatus 100 according to the embodiment of the present invention, the worker grips the metal pipe 60 with one hand or both hands between the first holder 21 and the second holder 22, Speed bending process can be performed through the operation of the controller, so that productivity can be improved, and problems such as deformations that may occur between the core portion 27 and the metal pipe 60 during the bending process can be solved It is possible to expect an improvement in productivity.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Base
12:
13: Piston
14: Links
15: Stopper
16: Supporters
20: Holding portion
21: first holder
22: second holder
23: hemispherical groove
24: Friction pad
25: Lubricant discharge hole
26: Lubricant storage tank
27:
28: first core
29: second core
31: connecting rod
32:
33: envelope
35: elastic member
40:
42: Pipe guide groove
50: Positioning jig
60: Metal pipe
100: Pipe bending device

Claims (8)

A metal pipe mounted on an upper portion of the base, a holding portion for fixing the metal pipe, and a bending portion for bending the metal pipe fixed to the holding portion. A pipe bending apparatus comprising a bending unit and a controller for controlling the respective components installed in the base,
Wherein the holding part includes a first holder and a second holder, a core part disposed inside the first holder and the second holder, and a cylinder part connected to the core part to move the core part a certain distance,
Wherein the core portion includes an elastic member connecting the first core and the second core to the first core and the second core.
The method according to claim 1,
Wherein at least one of the first holder and the second holder has a plurality of lubricant discharge holes, a nozzle coupled to the lubricant discharge hole, and a lubricant storage tank for supplying lubricant to the nozzle.
The method according to claim 1,
Wherein the first core and the second core each include a connecting rod connected to both end portions of the elastic member, a resin body formed on the outer surface of the connecting rod, and a sheath formed on the outer surface of the resin body.
The method according to claim 1,
Wherein the elastic member is one of a compression spring and a tension spring.
The method according to claim 1,
Wherein the cylinder part is detachably coupled to one side of the first core through a connecting rod.
6. The method of claim 5,
Wherein the connecting rod is provided with a stopper so that the insertion distance of the metal pipe is limited.
The method according to claim 1,
Wherein the base is provided with a positioning device for varying the position according to a size and a bending position of the metal pipe.
The method according to claim 1,
Wherein the first holder is further provided with friction pads for increasing the adhesion with the outer surface of the metal pipe.

Images