KR19980019502A - A method for fixing metal pipe at a right angle and apparat us about - Google Patents

Abstract

The present invention provides a fixing method for connecting two long metal pipes at right angles to each other by welding, but at the same time, it is possible to connect the metal hollow pipes easily and accurately by the fixing method. A device comprising: a first step of drawing an end of one of the two long metal hollow tubes of a metal hollow tube; A second step of punching the connection hole to be formed at a portion connected to the other metal hollow tube; A third step of fitting the drawing part of the first hollow pipe into the coupling hole of the second hollow pipe so as to be coupled; A setting method comprising a fourth step of expanding the coupling part of the first and second hollow pipes inside the second hollow pipe and joining the second hollow pipe; ; The second hollow pipe is stably mounted so that the second hollow pipe is installed in a line with the second hollow pipe fixing part so as to be joined to the first hollow pipe, and is inserted into the second hollow pipe to apply an external force (force) to the expansion pipe unit. Provides a metal hollow pipe fixing device composed of a striking device portion

Description

Right angle fixing method of metal hollow pipe and its device

The present invention relates to a fixing method and apparatus for connecting two elongated metal hollow tubes in a right angle state.

Specifically, the end of one metal hollow tube is drawn out of two long metal hollow tubes, the end of one metal hollow tube is drawn out of another metal hollow tube, and connected to the other metal hollow tube. It is to provide a fixing method and apparatus capable of perforating a portion to be made, joining the drawn part to the perforated portion, and expanding the combined portion to connect two long metal hollow tubes to form a right angle.

In general, two conventional methods of connecting metal hollow tubes having a length of 60 cm −1 m or more so as to be perpendicular are disclosed.

There is no method other than the welding connection method, and there is no device for connecting the metal hollow pipe at a right angle because the welding method is performed manually by the worker.

Therefore, the welding connection method according to the prior art causes the following problems.

That is, firstly, because the welded joint is fused, the joint is not only clean but also not smooth. Therefore, the welded joint has to be processed after forming a clean surface with a paper or the like, causing a problem of increasing the work process.

Secondly, if the parts connected at right angles are not paid attention, it is difficult to maintain the right angle and welded in a crooked state, which causes a problem.

Third, the surface of the metal hollow tube cannot be connected in a coated or painted state, because the coating layer on the surface melts due to the heat of welding.

Therefore, the surface must be coated or painted after all the connecting work is completed, which leads to an increase in work process and a decrease in productivity.

In addition, there is a very serious problem that the entire product should be discarded if the wrong welding of any part connected to the right angle and difficulty of continuous operation. For example, it is already known that a large number of straight metal hollow pipes are connected between a U-shaped outer frame in the case of a clothes rack. In such a product, an incorrect welding of one of the metal hollow pipes connected between the outer frames is performed. If you do, you will not be able to use the entire drying rack.

The present invention provides a fixing method that can be connected by a joining method other than welding in connecting two long metal pipes at right angles, and at the same time, it is possible to connect the metal hollow pipes easily and accurately by the fixing method. The purpose is to provide a device.

The present invention for achieving the above object, the first step of drawing the end of any one of the two metal hollow pipes of the metal hollow pipe; A second step of punching the connection hole to be formed at a portion connected to the other metal hollow tube; A third step of fitting the drawing part of the first hollow pipe into the coupling hole of the second hollow pipe so as to be coupled; There is a feature of the fixing method comprising a fourth step of expanding the joining portion of the first and second hollow pipes inside the second hollow pipe to be joined.

In addition, the present invention and the setting device unit for fixing the first hollow pipe from moving in one position; The second hollow pipe is stably mounted so that the second hollow pipe is installed in a line with the second hollow pipe fixing part so as to be joined to the first hollow pipe, and is inserted into the second hollow pipe to apply an external force (force) to the expansion pipe unit. It is characterized by providing a metal hollow pipe fixing device composed of a striking device.

1 is a block diagram showing a method according to the present invention;

2 is a cross-sectional view of the process according to the method according to the present invention;

3 is an overall perspective view of a device according to the invention,

4 is a front view of the device according to the invention,

5 is a perspective view of main parts of an expansion device according to the present invention;

6a and 6b is a plan view showing the action of the setting device unit according to the present invention,

7a and 7b is a longitudinal cross-sectional view showing the operation of the expansion device portion and the striking device portion of the present invention,

8 is a front action view showing a sealing return state of the expansion device of the present invention,

Figure 9 is an embodiment product in a state completed by the present invention.

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

1: 1st hollow pipe 2: drawing pipe part 3: 2nd hollow pipe

4: coupling hole 5: punching hole 6: expansion part

11: support frame 12: support 13: long hole

14: setting lever switch 15: blow lever switch

20: setting device 21, 22: pneumatic cylinder 23: pressure port

24: both arms rod 25: rotation rod 26: hinge axis

27: latching rod 28: spring (buffered) 29: buffer rod

31: expansion device portion 31: guide mechanism 32: sealing

32a, 34a: inclined portion 33: hinge shaft 34: expansion bracket

34b: expansion protrusion 35: return rod 36: rod lever

40: striking device portion 41: striking member 41b: locking piece

42: seal 43: spring 44: hinge shaft

45: stopper 46: locking projection 47: return spring

48: part 49: pneumatic cylinder

The method of connecting the metal hollow tube and the device according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show the two metal hollow tube perpendicular connection method according to the present invention, it will be described by the process sequence with reference to this drawing.

1st process

In the first step, the end of the first hollow tube 1 is plastically deformed by using a drawing machine, and the end of the first hollow tube 1 is blown to have a draw tube portion 2 having a small diameter. (See Figure 2 (a))

As described above, the drawing of the end of the first hollow tube 1 is performed when the first hollow tube 1 is coated or coated, and then the first step is performed before such coating or coating is performed. I will do painting work.

2nd process

The second step is carried out on the hollow tube 3.

That is, the second hollow pipe (3) has a portion connected to the first hollow pipe (1) in a right angle state, the drawing pipe portion 2 of the first hollow pipe (1) can be inserted into this connection portion It is a perforation process for making the coupling hole 4 perforate.

The second hollow tube 3 of the second process is also coated or painted after the coupling hole 4 is punched out, and the diameter of the coupling hole 4 is the drawn pipe part 2 of the first hollow tube 1. Is perforated to a size that is closely inserted.

Further, as the coupling hole 4 is punched into a press mold inside the coupling hole 4 of the second hollow pipe 3, the punching piece 5 having a state of being pushed inward as shown in FIG. 2 (b). The second step is to have the second hollow pipe 3 have such a coupling hole 4 and the other hole piece (5).

3rd process

The third step is a step of joining the first and second hollow pipes 1 and 3 manufactured by the first and second steps.

In this third step, the drawing pipe portion 2 of the first hollow pipe 1 is inserted into the coupling hole 4 of the second hollow pipe 3 (see Fig. 2 (c)).

When coupled in this way, the other hole piece part 5 inside the coupling hole 4 of the second hollow pipe 3 and the drawing pipe part 2 of the first hollow pipe 3 are in an overlapping state, and have such a state. Is a third step.

4th process

The fourth process is a joining process in which the first hollow pipe 1 is completely connected in a state perpendicular to the second hollow pipe 3.

In the fourth step, a separate expansion tool 34 is used as shown in Fig. 2 (d). In other words, the expansion tool 34 is inserted into the second hollow pipe 3 to be placed under the overlap pipe part 2 and the other hole piece 5 which overlap each other, and acts in a state of hitting upward in this state.

Accordingly, the overlapped drawing tube part 2 and the other hole piece part 15 become a state in which the expansion pipe part 6 is rolled up to be joined to form a state where the first and second hollow pipe parts 1 and 3 are completely connected. do.

After the completion of the fourth step, the first and second hollow pipes 1 and 3 joined at right angles are joined inside the second process pipe 3 so that they do not appear at all in appearance, so that their connection parts have a clean appearance. .

In the connection method of the present invention, in which the work is completed by the process steps from the first step to the fourth step, the first and second hollow pipes 1 and 3 having a small diameter are joined in a right angle. It is the biggest feature to make.

It will be described in more detail to help the understanding of the present invention.

The hollow tube refers to a tube through which the inside is drilled, and in such a hollow tube, there are a large diameter and a small diameter.

Therefore, in the case of connecting the two hollow tubes at a right angle in the case of the hollow tube having a large diameter, a welding method is generally performed. In some cases, an operator enters into the hollow tube to perform welding work.

However, in the case of a hollow tube with a small diameter, welding and other work cannot be performed therein. Therefore, the parts in which the two hollow tubes are connected to each other at right angles must be welded from the outside by welding. You will have many problems.

Therefore, the present invention provides a suitable method for connecting and fixing two long hollow tubes having a small diameter at a right angle, which is characterized by them.

Therefore, an apparatus for realizing the method of the present invention will be described.

3 to 8 show a hollow tube connecting device according to the present invention. Referring to FIGS. 3 and 4, a base 10 is provided, and the support frame 11 is installed to be fixed to an upper portion of the base 10. do.

The support frame 11 is formed of a horizontal portion 11a and a vertical portion 11b, and is provided with a setting device portion 20 for erecting the first hollow pipe 1 in the vertical direction.

The setting device portion 20 is provided with two pneumatic cylinders (21, 22) for fixing to stand upright, respectively, one lower pneumatic cylinder (21) used to hold the lower end of the first hollow pipe (1) And the other is the upper pneumatic cylinder 22 to be fixed by pressing the upper end. These are installed to be fixed to the support frame 11, the horizontal portion (11a) and the vertical portion (11b), respectively.

On the other hand, in front of the support frame 11 is provided a long support 12 in a state fixed to the base 10. The support 12 is formed in the longitudinal direction of the hemispherical groove (12a), it is to be placed so that the second hollow tube (3) is raised.

In addition, after the second hollow pipe 3 is placed in the support hole 12, the drawing hole of the first hollow pipe 1 as a coupling hole (4) to be bored and provided in the second hollow pipe (3) (2) is inserted. Of course, the order is changed so that the drawing pipe part 2 of the first hollow pipe 1 is fitted into the coupling hole 4 of the second hollow pipe 3, and then the second hollow pipe 3 is placed on the support hole 12. As it may be raised, these are manufactured by the 1st and 2nd hollow pipes 1 and 3, and are artificially performed according to the form. In the embodiment of the drawings, the first hollow pipe 1 is fixedly connected between the U-shaped second hollow pipes 3.

Accordingly, the upper pneumatic cylinder 22 is operated after the first and second hollow pipes 1 and 3 are mounted on the support hole 12 in which the first and second hollow pipes 1 and 3 are coupled to each other.

The upper pneumatic cylinder (22) has a pressure port (23) at the tip of the piston rod (22a), the pressure port 23 is the first and second hollow pipe (1) in accordance with the operation of the piston rod (22a) is advanced Pressing (3) causes their connection to be in close contact.

In addition, by the operation of the lower pneumatic cylinder 21 is to hold the lower end of the first hollow pipe (1) standing in the vertical direction.

6A and 6B show the operation state, and both arm rods 24 are connected to the piston rod 21a of the lower pneumatic cylinder 21 to be interlocked. Rotating rods 25 each having a 25a are connected to each other so as to be interlockable.

The rotating rod 25 is rotated about the hinge shaft 26, the hinge shaft 26 is capable of moving forward and backward along the long hole 13 formed in the support frame (11). In addition, a rod catching hole 27 is installed behind the rod catching hole 27, and a buffering rod 29 is installed at the rod catching hole 27 to be pushed in the rear direction (lower pneumatic cylinder direction) under the force of the spring 28. have.

Therefore, when the piston rod 21 of the lower pneumatic cylinder 21 is moved forward, both arm rods 24 are caught by the rod catching opening 27 to open outward as shown in FIG. 6B, and thus the rotation rod 25 is As the pivot shaft 26 is rotated about the hinge shaft 26, the noise sphere 25a is held in a state of biting the lower end of the first hollow pipe 1 in the vertical direction.

At this time, the hinge shaft 26 is moved along the long hole 13 for the operation because the rotation rod 25 also has to be moved forward while both arm rod 24 is moved to the rod locking hole 27 position.

In addition, when both arm rods 24 come in contact with the rod catching hole 27, the buffer rod 29 is first pushed against the shock absorbing rod 29 to cushion the initial impact force, thereby reducing the impact.

On the other hand, the return to the original position after the work is completed by the reverse order and reverse operation of the above-described order and operation. Incidentally, the operation of the lower and upper pneumatic cylinders 21 and 22 of the setting device 20 is performed by operating the setting lever switch 14 shown in Figs.

On the other hand, one side of the hemi-spherical groove (12a) of the support hole 12, as shown in Figs. 1 and 7a and 7b, the expansion device portion 30 is installed, the device portion is a long guide sphere (31) It is installed to be fixed to 12).

The guide tool 31 is provided with a guide hole 31a, in which a seal 32 is fitted. In addition, the end portion of the seal 32 is formed to form an inclined portion 32a, and in front of it, a expansion tool 34 is provided, which is connected to the guide shaft 31 by a hinge shaft 33, which is a seal 32. And an inclined portion 34a in contact with the inclined portion 32a.

Therefore, when the seal 32 is pressed and moved in the direction of the expansion pipe 34, the inclined portions 32a and 34a are pushed together so that the expansion tool 34 is rotated upwardly about the hinge shaft 33. The connection part of the 1st and 2nd hollow pipes 1 and 3 will be joined by the expansion pipe protrusion 34b provided in the upper part of the expansion pipe | tube 34, and is demonstrated in more detail later. And the guide tool 31 of the portion having the expansion tool 34 has a structure that is open to the outside so that the expansion tool 34 can ascend.

In addition, the expansion device unit 30 is a return rod 35 for returning the sealing 32 moved forward to the original position for the next operation is moved in the left and right directions by the operation of the rod lever 36 The end of the return rod 35 pushes the end of the seal 32 so that the seal 32 returns to the original position.

On the other hand, outside the expansion device unit 30 is provided with a striking device unit 40 for applying an external force to the expansion device unit 30.

The striking device portion 40 includes a striking member 41 having a recess 41a and a locking piece 41b, a housing 42 for installing the striking member 41 to move forward and backward, and the housing ( 42 is configured to have a spring 43 installed inside to impart force to the striking member 41.

In addition, a stopper 45 having a locking protrusion 46 which is rotated about the hinge shaft 44 at the lower part of the housing 42 and is engaged with and disengaged from the groove 42, and a rear end portion of the stopper 45. A return spring 47 for pressing 45a) to its original position and a pushing piece 48 for pressing the stopper 45 end portion 45b to impart rotational motion to the stopper 45 are provided with a piston rod 49a. It has a structure provided with the striking pneumatic cylinder 49 provided in it.

The operation of the expansion device unit 30 and the striking device unit 40 will be described with reference to FIGS. 7A and 7B.

Referring to Figure 7a, the expansion tool 34 is in close contact with the guide tool 31 in this position in the pull-out pipe portion 2 and the impact piece (2) of the first and second hollow pipes (1) (3) in this position 5) is placed.

In this state, when the piston rod 49a of the pneumatic cylinder 49 is operated backward by the operation of the blow lever switch 15, the stopper 45 is moved as the pushing piece 48 is moved to the left in FIG. 7A. The tip portion 45b is rotated downward.

Therefore, the locking projection 46 of the stopper 45 is disengaged from the groove 41a, whereby the striking member 41 rapidly moves forward by the elasticity of the spring 43 to strike the seal 32 strongly. Next, the piston rod 49a of the pneumatic cylinder 49 is moved forward almost immediately.

Therefore, as shown in FIG. 7B, the pushing piece 48 pushes the catching piece 41b so that the striking member 41 moves backward, and the spring 43 is compressed again by this operation.

In addition, the rear end portion 45a is pushed by the return spring 47 so that the stopper 45 is in the original position and the latching protrusion 46 is caught by the recess 41a of the striking member 41 which moves backward. As such, all these operations proceed almost instantaneously.

On the other hand, the seal 32 is moved as the striking member 41 is hit hard, so that the expansion tool 34 in contact with the inclined portions 32a and 34b is centered on the hinge axis 33. Ascends upwards.

Therefore, the expansion pipe projection 34b of the expansion tube 34 is inserted into the drawing pipe portion 2 overlapping with the other hole piece 5 of the first and second hollow pipes 1 and 3 and they are lifted up.

Therefore, as shown in FIG. 7B, they are in a state of being firmly bonded as they are plastically deformed in a state where they are rolled up and thus, the first and second hollow pipes 1 and 3 are fixed to be connected.

And in order to be completely connected, the striking member 41 repeatedly hits the seal 32 about 3-4 times.

After completion of the connection work of the first and second hollow pipes (1) (3), the sealing rod (32) returns to its original position as the return rod (35) moves backward by the operation of the rod lever (36). (See Figure 8)

When the seal 32 is returned to the original position in this way, the expansion tool 34 which has been raised up as shown in Fig. 7B returns to the original position in the state of being lowered by its own weight, thereby enabling the next operation.

On the other hand, the expansion protrusion 34a of the expansion tool 34 has a rectangular shape as shown in FIG. It is inserted into the circular drawing pipe part 2, and a strong pressure is applied to the drawing pipe part 2 and the other piece 5 by the corner of the expansion pipe part 34a so that the first hollow pipe 1 ) Is to be firmly fixed to prevent rotation.

Figure 9 shows the finished product according to the present invention, the first, the hollow tube (1) and the second hollow tube (3) at a right angle to the site where they are connected to fix them at right angles without welding marks as before. It will be possible.

According to the above description, the present invention can produce a product having a commercially free weld trace, and provides the effect of improving the convenience and production efficiency.

And the device according to the present invention has the effect that can be connected to fix the first and second hollow pipe at a right angle without a failure rate even unskilled.

Claims (5)

A method of fixing the first and second hollow tubes at a right angle; A first step of drawing an end of the first hollow pipe to have a drawn pipe portion having a small diameter; A second step of having a coupling hole into which a drawing pipe part of the first hollow pipe is inserted at a connection portion of the second hollow pipe and a punching part at a lower peripheral edge of the coupling hole; A third step of inserting the drawing pipe part of the first hollow pipe into the coupling hole of the second hollow pipe so that the drawing pipe part and the other hole piece overlap; The metal hollow pipe of claim 1 or 2, wherein the overlapped drawing pipe part and the other hole piece of the first and second hollow pipes are expanded and fixed to be connected by being rolled up by the expansion tool inside the second hollow pipe. Right angle fixing method. An apparatus for fixing the first and second hollow pipes in which the drawn pipe part and the other hole piece overlap each other; An upper pneumatic cylinder having a pressurizing port for pressurizing the first hollow pipe, which is erected in a direction perpendicular to the support frame on the base, and a pivoting rod and a pivoting rod operated around the hinge axis to hold the lower end of the first hollow pipe. A setting device unit comprising a lower pneumatic cylinder for operating both arm rods and a rod catching hole for opening the both arm rods; A guide tool installed in the vertical direction, a seal moved in the guide tool and having an inclined portion at one end, and an inclined portion which is pivoted up by a hinge axis at the tip of the guide and pushed up by the inclined seal portion; An expansion device portion configured of an expansion tube having an expansion tube portion for expanding the drawn tube portion and the other hole piece of the hollow tube; In the housing installed on one side of the expansion device part is provided with a striking member that is given elasticity by a spring and strikes the seal, and a catching protrusion which is caught by the groove in the engaging piece of the striking member and is caught by the groove about the hinge axis. And a striking device portion including a stopper having a locking projection and pivoting about a hinge axis and returning to its original position by a return spring, a pusher portion for urging the stopper tip downward, and a pneumatic cylinder for operating the pusher portion. Right angle fixing device for a metal hollow tube. 3. The right angle fixing device for a hollow metal tube according to claim 2, wherein the sealing of the expansion pipe portion is configured to move to return to its original position by a return rod operated by a rod lever. According to claim 2, wherein the right angle fixing device of the hollow metal tube, characterized in that configured to be buffered by the buffer rod receives a spring force during the forward movement of both arm rods of the setting device. According to claim 2, wherein the hinge axis of the setting device portion is guided to the long hole, the right angle fixing device of the metal hollow tube, characterized in that the movement.