KR20060080575A - Method for bending a pipe and apparatus for bending the same - Google Patents

Abstract

According to the present invention, a single metal mold is mounted on a press to bend pipes continuously so that high quality pipes can be produced at low cost while minimizing equipment cost and manpower consumption. To provide a pipe bending method and a bending device that can greatly contribute to resource saving.

That is, according to the present invention, the metal material M is automatically fed into the bending device 1 including the upper die 2 and the lower die 3 mounted on the press by a feeder, and then bent sequentially to bend the circular pipe P. A pipe bending device 1 is constructed, which is an inlet 4 for injecting the material M into the lower mold 3 and an upper mold 2 of the material M injected onto the inlet 4. Clamp 5 elastically installed on the spring 6 for temporarily clamping at the time, and the front and rear edges of the upper surface portion of the material (M) to be supplied to the rear side of the inlet portion 4 of the lower mold 3 to chamfer Bending part 8 provided with stopper 9 at the end so that the chamfering part 7 of the upper part 2 corresponding part and the raw material M which was chamfered while passing through the chamfering part 7 are inputted for bending. And a cutter 10 formed on the upper die 2 corresponding to the upper portion of the bending part 8 and a material M cut by the cutter 10 for bending. In order to lower the upper die 2, the slider 11 is guided to the front-rear guide bar 11b and elastically installed on the lower die 3 by a spring 24, and the slope 11a formed on the slide 11 is raised. The material M formed and cut on the slide pusher 12 having the slope 12a corresponding to the upper die 2 and the lower die 3 constituting the bending part 8 to be pushed to the rear side thereof is A waveform-bending die 13 for bending the rough waveform, a waveform-bending punch 14 formed in the upper die 2 corresponding to the waveform-bending die 13, and the waveform-bending die 13 First and second semicircular-bending dies 15 and 16 and wrist-listing-bending dies 17 for bending the first and second rounds and list-liquids of the material M to the front side, and the bending core 18 and Semicircle punching correspondingly in the upper die 2 when bending the material M in a circle with the 1st and 2nd semi-circular bending dies 15 and 16 and the wrist-like bending die 17. It provides a pipe bending device formed with the mold-bending punch (19, 20, 21),

The process of chamfering in the state where the material M is clamped with the clamp 5 firstly while putting the material M between the upper mold 2 and the lower mold 3 constituting the bending device 1 above, Cutting the chamfered material (M) to a predetermined length with the cutter 10, and by inserting the material (M) cut by the cutter (10) to the bending unit 8, the wave-bending die 13 And the bending of the rough waveform with the waveform-bending punch 14 and the continuous conveying with the slider 11 in the next process, and the first and second semi-circular bending bends 15 and 16 with the material bent in the waveform. Punching with semi-circular-bending punches 19 and 20 through the bending core 18 on (11) to bend in a circle, and finally, the material M at the end of the bending core 18 is finally rounded pipe (P). ), After bending the list with the bending and bending dies 17 and the semi-circular bending punch 21 to cut the pipes The pipe was automatically bent by the ejecting process.

The present invention can mass-produce high quality pipes at a low cost while minimizing equipment installation cost and manpower consumption, and can greatly contribute to resource saving because there is no loss of material.

Pipe Bending Method and Bending Device, Upper, Lower, Input, Bending, Corrugated-Bending Die, Semi-Circular-Bending Die, Punch, Slider

Description

Method for bending a pipe and apparatus for bending the same

1 is a process block diagram illustrating a pipe bending method provided by the present invention.

Figure 2 is a top, bottom decomposition screw constituting the pipe bending apparatus provided in the present invention

try

Figure 3 is a plan view showing the lower die constituting the pipe bending apparatus provided in the present invention

Figure shows the state of action when the upper mold rises

Figure 4 is a plan view showing a lower mold constituting the pipe bending apparatus provided in the present invention

As a figure, the state of action when the upper die descends

Figure 5 is a bottom surface showing the upper mold constituting the pipe bending apparatus provided in the present invention

Degree

6 is an image of the upper mold descending constituting the pipe bending apparatus provided in the present invention.

Side view

7 is a pipe bending material using a pipe bending device provided in the present invention

Process diagram schematically showing the sequential process of bending

■ Explanation of symbols used in main part of drawing ■

1: bending device 2: upper type

3: Bottom type 4: Input part

5: clamp 6: spring

7: Chamfering part 8: Bending part

9: stopper 10: cutter

11: slider 11a: slope

11b: guide bar 12: slide pusher

12a: Slope 13: Waveform-Bending Die

14: Waveform-Bending Punch 15: 1st Semi-Circle-Bending Die

16: 2nd semi-circular bending die 17: List Liking Bending Die

18: bending core 19,20,21: semi-circular bending punch

24: spring 25: ejector

The present invention relates to a pipe bending method and a bending device, and more particularly, by mounting a metal mold up and down single mold on a press to bend the pipe continuously to minimize the equipment cost and manpower consumption It is to provide a pipe bending method and a bending device that can mass-produce high-quality pipes at a low cost and contribute significantly to resource saving because there is no loss of material.

In general, when iron metal is to be piped, it is produced by using a progressive method or a transfer method.

In the former manufacturing process, the former has a lot of waste due to the loss of material, and in the latter case, when the pipe is manufactured through five processes, there are five presses, so the installation cost of equipment is greatly consumed. The problem was that productivity was extremely low.

In addition, both have high initial costs for equipment installation, large manpower consumption, and cannot be mass-produced. In the case of drawn pipes, the manufacturing cost is high, and there is an urgent need for a solution that can solve the problems of the existing pipe manufacturing method. It would have been.

Accordingly, the present invention is to provide a novel pipe bending method and a bending device that can eliminate all the problems that occur during existing pipe manufacturing,

In particular, the present invention can be pipe-making by chamfering a metal material, cutting it to a predetermined length, bending it into a rough waveform, and performing circular bending operations and final re-listing bending operations for one and two orders sequentially in a single device. The present invention has been made in view of the technical problem of the present invention by providing a pipe bending method and a bending device.

In the pipe bending method provided by the present invention, as shown in the overall molding process block diagram of FIG. 1, a material wound in a roll type is introduced between the upper mold 2 and the lower mold 3 of the bending device 1. First, temporarily clamping and fixing the material in the supply state, and then chamfering, cutting the chamfered material into a predetermined length, bending the cut material into a rough waveform, and bending the material bent into the waveform 1 ~ Bending and round-resting the circular pipes sequentially in the second order, and automatically ejecting the finished products bent into the pipes.

Pipe bending device 1 of the present invention for bending the material (M) in a circular pipe (P) in this continuous process is shown on a conventional press (not shown) as shown in Figs. The upper mold 2 and the lower mold 3 are mounted up and down, and are fed by a feeder (not shown) automatically through a feed part 4 of the lower mold 3 in a rolled state in a roll type. A clamp 5 for supplying (M) is elastically installed on the upper mold 2 with a spring 6 so that the upper mold 2 is temporarily clamped when the upper mold 2 is lowered, and the lower mold 3 is inserted. On the rear side of the portion 4, a chamfered portion 7 for chamfering the front and rear edges of the upper surface portion of the material M to be supplied to the slope is provided in the corresponding portion of the upper mold 2.

The stopper 9 which can limit this when the chamfered material M is introduced into the bending portion 8 by the feeder while passing through the chamfering portion 7 has one end portion of the bending portion 8. And a cutter 10 for cutting the injected material M into a predetermined length is formed in the upper mold 2.

And the slider 11 is guided to the left and right guide bar (11b) to the lower side (3) to the front side with the spring 24 to sequentially bend and transport the material (M) cut by the cutter (10) back and forth It is installed to allow the elastic slide operation, the slider 11 is moved to the rear side when the upper die 2 is lowered for the front and rear slide operation of the slider 11 and the spring 24 when the upper die 2 is raised. The slide pusher 12 having an inclined surface 12a is formed on the upper die 2 so as to be able to be returned to the front side again by the restoring force. ) Is formed.

In addition, a primary waveform-bending die 13 is formed in the lower mold 3 in order to bend the material M cut to a predetermined length in sequence in the bending portion 8, and the waveform-bending die ( Corrugation-bending punch 14 is formed in the upper die 2 corresponding to 13).

And the front end of the waveform-bending die 13 for the final re-listing forming operation to have a first and second semi-circular-bending die (15, 16) and a circular cross section for bending the material (M) in the second to third round The wrist-breaking die 17 is formed.

On the wave-bend die 13, the first and second semi-circular-bending dies 15 and 16, and the wrist-making-bending die 17, a circular cross section for internal concentric bending when bending the material M in a circle A round bar type bending core 18 having a fixed shape is installed in the front side of the ejector 25 integrally connected to the front side of the slider 11 through the guide bar 11b, and the finished product, that is, the pipe P Taking out is automatically performed by the raw material M conveyed from the back side of the bending core 18.

When the material M is bent in a circular shape with the bending core 18, corresponding semi-circle-bending punches 19, 20, and 21 are formed to punch while descending from the upper die 2.

In the figure, reference numeral 22 denotes a cushion supporter, and 23 denotes a lower limit stopper for determining the upper die 2 lowering width.

Pipe bending method and the bending device 1 of the present invention can be configured as described above between the upper mold (2) and the lower mold (3) mounted on the press the metal material (M) that is automatically wound and supplied to the feeder in a roll shape When the product is automatically put onto the feeding part 4 of the mold, the material M is transferred by the continuous lifting operation of the upper mold 2, and then formed into a pipe P through chamfering, cutting, and bending several times. As the discharge is made, its action and the like will be described in more detail below.

That is, according to the present invention, the operator manually inserts and sets the raw material M wound on the feeder onto the input part 4 of the lower mold 3 while the upper mold 2 of the press is opened. When the operation is performed, the material M is automatically fed and the clamp 5 installed on the upper mold 2 when the upper mold 2 is lowered clamps the material M on the input part 4 and the upper mold 2 at the same time. Chamfering is performed while punching both ends of the upper surface portion of the material M constituting the inner end when the pipe P is manufactured by the chamfering molded portion 7 formed at the upper side. When the upper mold 2 rises, the clamp As the material M whose clamping state is released by (5) is continuously fed by the feeder, the input end of the material M reaches the position where the stopper 9 provided at the end of the bending part 8 is formed. , Due to the lowering of the upper die 2, the material M is cut to a predetermined length by the cutter 10.

The cutting process is cutting while pressing the material (M) from the top to the bottom by the step of forming the bending portion 8 of the cutter 10 and the lower mold 3 formed in the upper mold (2) is lowered. The cut material (M) is a schematic waveform, which is a preliminary step for manufacturing a circular pipe (P) by the waveform-bending punch 14 of the upper die (2) while being transferred to the waveform-bending die (13) Bending takes place.

The material M, which is bent in a roughly wave form by the wave-bending die 13 and the wave-bending punch 14, is the slope 12a of the slide pusher 12 when the slider 11 descends the upper die 2. Since the slider 11 is pushed and lowered on the slope 11a, when the upper die 2 is raised, the slider 11 moves forward by the restoring elasticity of the spring 24 to push the material M forward. When the next drop of the upper die 2, the first and second circular bending is made.

That is, the material M transferred to the primary semi-circular bending die 15 on the front side is the bending core 18 and the upper die 2 provided on the slider 11 front side of the lower die 3 when the upper die 2 is lowered. The bending is made close to the primary circular pipe shape by the corresponding semi-circular bending punch 19 of the upper portion by moving forward by the material M conveyed from the rear side to the next secondary semi-circular bending die 16. (2) Bending is performed closer to the round pipe once more by the corresponding semicircular-bending punch 20 of the next upper die 2 in the state of being coupled in a ring shape to the bending core 18 at the time of lowering. After the transfer is made by the material (M) conveyed from the rear side by the wrist-listing-die die (17), the lower end of the upper die (2) is finally rounded to match the inner diameter of ± 0.1 by the corresponding semi-circular bending punch (21). (P) is to be formed, and is conveyed from the rear side at the end of the bending core 18 The pipe P molded by the raw material M is taken out automatically.

As described in detail above, in the case of bending the pipe by the pipe bending method and the bending device provided in the present invention, when one worker sets only the input of the initial material, the pipe is continuously manufactured by automatic bending. It is a great invention that it can mass-produce high-quality pipes at low cost while minimizing cost and manpower consumption, and it can contribute greatly to resource saving because there is no loss of material.

Claims (2)

In the pipe bending method of inserting a metal material (M) into the pipe bending device (1) and bending sequentially to bend into a circular pipe (P); In the state where the material M is clamped with the clamp 5 when the material M is first lowered while the material M is introduced into the upper portion of the inlet portion 4 of the lower mold 3 constituting the bending device 1. Chamfering by the chamfering portion (7), Cutting the chamfered material (M) with a cutter 10 to a predetermined length, and The material M cut by the cutter 10 is introduced into the bending part 8 and bent in a waveform with the waveform-bending die 13 and the waveform-bending punch 14 and then moved to the next step with the slider 11. Continuous transfer process, The material M bent in the wave form is punched with semi-circular bending punches 19 and 20 via the first and second semi-circular bending dies 15 and 16 and the bending core 18 installed on the front side of the slider 11. Process of bending in a circle, At the end of the bending core 18, the material P is finally rolled with a wrist-listing-bending die 17 and a semi-circular-bending punch 21 to form a circular pipe P, and then the pipe P is completed. Pipe bending method, characterized in that the process consisting of automatically taking out the bending core (18). Pipe bending device (1) for automatically feeding the metal material (M) to the bending device (1) consisting of the upper die (2) and the lower die (3) mounted on the press by the feeder to bend sequentially and to bend the circular pipe (P) In constructing; The bending device 1 has an input part 4 formed for inputting a material M into the lower mold 3 and a material M injected onto the input part 4 when the upper mold 2 descends. A clamp (5) elastically mounted to a spring (6) for temporary clamping, Chamfering portion 7 of the upper mold (2) corresponding portion for chamfering the front and rear corners of the upper surface portion of the material (M) to be supplied to the rear side of the input portion (4) of the lower mold (3), A bending part 8 having a stopper 9 provided at an end thereof so that the material M which is chamfered through the chamfering molded part 7 is introduced for bending; A cutter 10 formed on the upper die 2 corresponding to an upper portion of the bending part 8, Slider 11 which is guided to the front and rear direction guide bar (11b) to transfer the material (M) cut by the cutter 10 for bending and elastically installed on the lower mold (3) by the spring 24, A slide pusher 12 having a slope 12a corresponding to the upper die 2 so as to push the slope 11a formed on the slide 11 to the rear side when the upper die 2 descends; A waveform-bending die 13 for bending the cut material M formed in the lower die 3 constituting the bending portion 8 into a rough waveform, and an upper die corresponding to the waveform-bending die 13. A waveform-bending punch 14 formed at (2), First and second semicircular-bending dies 15 and 16 and wrist-listing-bending dies 17 for first and second bending and list-riking the material M in a circle to the front side of the waveform-bending die 13. Wow, In the case of bending the material M in a circular shape together with the bending core 18 and the first and second semi-circular-bending dies 15 and 16 and the list-lying-bending die 17, the upper mold 2 corresponds to this. Pipe bending device, characterized in that the punching semi-circular bending punch (19, 20, 21) is formed.

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