KR100440000B1 - A pipe bender - Google Patents

Abstract

The present invention relates to an improvement of an apparatus for bending a pipe.

In the main configuration, a rotating mold 4 having a desired bending curvature of the pipe 100 is formed in the middle of the horizontal axis 3, and the supporting roller 22 supported by the supporting cylinder 20 is provided at the base 5 below. After installing the support (6) protruding to the rear end of the rotating mold (4) of the horizontal shaft (3), the support roller 40 was installed, and the fixing device for pressing the end of the pipe 100 thereon again (41) ) Was installed.

In addition, the pinion 30 is formed at both ends of the horizontal shaft 3, and the driving cylinders 31 and 31 'are installed at the lower side frames 2, respectively, and then rods of the driving cylinders 31 and 31' are mounted. Each of the rack gears 33 and 33 'is connected to the pinion 30 so as to alternately rotate the drive shafts 31 and 31' so that the horizontal shaft 3 rotates repeatedly. It is characterized by.

Therefore, according to the bending device of the present invention, it is possible to fundamentally solve the torsion of the pipe and to be able to bend the desired shape accurately without deformation or wear of the pipe, after all, according to the bending device according to the present invention the same size as the conventional Even if you use the power of the bend at a time can be doubled compared to the conventional, and the speed is also twice as fast as the conventional, so in the end, while producing a precise and smooth product compared to the conventional four times the increase in production Can bring

Description

Pipe Benders {A pipe bender}

The present invention relates to a device for bending a pipe, and more particularly, a device for bending a rectangular or round pipe having various curvatures used in a hinged pipe for a vehicle trunk lid or a fuel pipe and other industries. It is about.

As is well known, there are hydraulic bending machines and CNC bending machines for bending pipes, and these general bending machines are not accurate in bending angle, and the curved portion generated by bending is not smooth. There was a problem that was.

In particular, the conventional general bending apparatus is fixed to the rotational mold having the desired curvature vertically in the center and fixed to one end of the pipe at the starting point of the curvature, the roller closes the pipe to the outer surface of the rotational mold while The horizontal movement produces pipes with the same curvature as that of rotating molds.

In view of the problems of this bending device, it is difficult to make the rollers have exactly the required trajectory because the rollers must first bend the pipe while the roller moves along the outer circumference of the irregularly shaped rotary mold and thus requires a lot of power. do.

In addition, one end of the pipe is passed to the bending machine, but the other side should be left free. Therefore, the opposite side of the pipe's passing position acts to be struck down during the bending work, and when the bending is completed, the pipe is slightly twisted. As the phenomenon occurs that the bending occurs, there is a problem that the defective rate of the product is very high.

In addition, in the conventional bending device, the clamping portion of the pipe is a structure that only asks both sides of the pipe by the action of the cylinder, so that it cannot be firmly and reliably asked. Therefore, the portion that was bited while bending the pipe was separated or bited. Excessive flaw was also one of the main reasons for the high failure rate.

The present invention has been made in view of the above-mentioned problems, and improves the overall system of the apparatus for bending pipes vertically to eliminate the torsion during bending operation and without requiring great force by improving the power unit. It aims to maximize the work efficiency and to improve the clamping structure so that the pipe can be stably supported until the bending is completed and the occurrence of defects due to the bite can be minimized.

1 is a front view showing the overall configuration of the present invention

Figure 2 is a side cross-sectional view as seen from A-A of FIG.

3 is a side cross-sectional view seen from B-B of FIG.

4 is an operational state diagram of FIG. 3 and a state diagram at the time of starting a bending operation;

5 is an operational state diagram of FIG. 3 and a state diagram at the time when the bending operation is completed.

FIG. 6 is an enlarged view as viewed at 'C' of FIG. 3.

7 is a perspective view of FIG. 6

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

1: bending device 2: frame 3: horizontal axis

4: rotating mold 5: base 6: support

10: clamping device 11: bleeding cylinder 12: working

13: platform 14, 14 ': fixture 15: slope

16, 16 ': effector 17: inclined surface 18: spring

20: support cylinder 21: rod 22: support roller

30: Pinion 31, 31 ': Drive cylinder 32: Rod

33, 33 ': rack gear 40: support roller 41: fixing device

42: cylinder 43: rod 44: fixture

100: pipe

The bending device of the present invention is configured by setting up the frame on both sides, and then installing a horizontal axis on the top, installing a rotating mold on the horizontal axis, and configuring a supporting roller and the like necessary to have a curvature opposite to the curvature of the rotating mold. By the rotation by the bending to be made vertically, the horizontal axis is improved by the way to rotate by two racks is characterized in that the transmission of power is made uniform and stable.

In addition, the support rollers with cushioning and elasticity function are installed under the horizontal mold of the horizontal axis to support the pipe during the bending process so as to be in close contact with the rotating mold and to rotate along the movement of the pipe by bending. This prevents the occurrence of excessive or excessive stress, and also improves the pipe biting device to firmly support the pipe and to prevent the occurrence of scratches on the biting part.

Hereinafter will be described in detail with reference to the accompanying drawings a preferred configuration for implementing the invention as follows.

1 is a front view showing the overall configuration of the bending device 1 according to the present invention, it can be seen that the frame 2 is installed upright on the left and right, and the horizontal axis 3 is installed therebetween. In the middle of the horizontal axis (3) was configured a rotary mold (4) having a desired bending curvature of the pipe (100).

At the lower end of the rotating mold 4, a clamping device 10 is formed to bite the pipe 100, and a base roller 20 is formed at the base 5 below the support roller 22 on the rod 21. By installing it to support the function when the pipe 100 is bent.

The pinion 30 is formed at both ends of the horizontal shaft 3, and the driving cylinders 31 and 31 'are installed at the lower frame 2, respectively, and then the rods 32 of the driving cylinders 31 and 31' are installed. ), The rack shafts (33) and (33 ') are connected to the pinion (30) by connecting the drive cylinders (31) and (31'), respectively, so that the horizontal axis (3) rotates repeatedly. It can be seen. The above configuration is shown well in FIG.

In addition, the upper end of the rotating mold (4) of the horizontal axis (3) in the process of bending the pipe 100, the back end of the pipe 100 is supported by the rotating mold (4) to bend in the opposite direction The support roller 40 is provided for the cycle, and the upper portion of the support roller 40 is temporarily maintained to prevent the pipe 100 from returning to its original state (spring back) at the time when the bending is completed. It can be seen that the fixing device 41 for pressing the end of the pipe 100 is installed.

FIG. 2 is a cross-sectional view seen from the direction AA in FIG. 1, and the pinion 30 and the rack gears 33 and 33 ′ provided at both ends of the horizontal shaft 3 can be clearly seen. The size gear 33 is in the lowered state, and at this time, the other rack gear 33 'is in the raised state.

3 is a cross-sectional view seen from the direction BB of FIG. 1, after the support 6 is protruded to the rear end of the horizontal axis 3, and the support roller 40 is installed just above the upper rotating mold 4. On top of that, the fixing device 41 was installed on the fixing device 41. The fixing device 41 installed each of the cylinders 42, and then installed the fasteners 44 on the rods 43 so that the cylinders 42 worked. If the fixture 44 is configured to lift.

In addition, it can be seen that the clamping device 10 is installed to fix the pipe 100, Figure 6 and Figure 7 shows a more detailed configuration. That is, the rear end of the support (6) is equipped with a needle cylinder 11 and under the support (6) to form a working rod 12 for lever lever movement by the action of the needle cylinder 11, the pipe ( A platform 13 on which a tip of 100) is mounted is connected.

Fixing fixtures 14 and 14 'are fixed to the upper edge of the platform 13, and the fixing fixtures 14 and 14' have inclined surfaces 15 which protrude downwards on opposite sides, respectively. On the inclined surface 15 side of the 14), the actuators 16 and 16 'having the opposite inclined surfaces 17 are respectively installed, and the platform 13 and the actuators 16 and 16' are respectively provided. Spring 18 is provided between, the space between these working spheres 16, 16 'is to be a space on which the tip of the pipe 100 is placed.

The upper surface of the actuation tool 16, 16 ′ touches the lower end of the rotary mold 4 so that the lift is restricted.

Looking at the action of the clamping device 10, the lifting platform 13 is lifted by the action of the bleeding cylinder 11 is lifted the lifting platform 13 and the lifting platform 16 (16 ') in the state of being restricted Since the 13 and the fasteners 14 and 14 'are raised, the action spheres 16 and 16' are gathered to the center and bury the pipe 100 due to the friction of the inclined surfaces 15 and 17.

Therefore, according to the clamping device 10 of the present invention, the upper end of the pipe 100 is in close contact with the lower end of the rotary mold 4 by the lifting of the lifting platform 13, and the lower end is in close contact with the lifting platform 13, and the pipe ( Since both sides of the 100 are pressed by the action holes 16 and 16 ', the result is that the pipe 100 is uniformly held in four directions, so there is no fear of detachment during the bending process. The risk of scratches on the surface is also minimized.

As described above, the configuration of the present invention is a configuration example in which two rectangular pipes 100 are bent on one rotary mold 4 and two rotary molds 4 are installed on a horizontal axis 3. If one of ordinary skill in the art increases the number of rotating molds (4) and increases the size of the power, more pipes (100) can be bent at one time, and also the rotating molds (4) and the supporting rollers ( 22) and the effector 16, 16 ', etc., the shape of the pipe can be bent in a variety of cross-section shape, and if the curvature shape of the rotating mold 4 is changed, the pipe can be bent in any of various ways. There will be a number.

Reference numeral 34 in the figure is a rack gear guide, 45 is a guide rod for the action of the fixture.

The operation of the present invention having such a configuration will be described with reference to FIGS. 4 and 5.

First, the pipe 100 should be clamped by the clamping device 10, and the tip of the pipe 100 is pushed between the action holes 16 and 16 ′ of the clamping device 10 to start the operation.

First, after the clamping cylinder 11 acts to clamp the pipe 100 in the same manner as described above, the supporting cylinder 20 acts so that the supporting roller 22 supports the lower portion of the pipe 100. give.

After that, the driving cylinders 31 and 31 'start to act, and the two driving cylinders 31 and 31' act in the opposite direction so that the rack gear 33 on one side rises and the other rack gear ( 33 ') is the pinion 30 is rotated by the descending, so that the horizontal axis (3) is rotated.

In this action, since the horizontal shaft 3 is rotated by the two rack gears 33 and 33 'which act in the opposite direction, a uniform and stable operation is possible even with a small rotational force.

Compared with the conventional one, the conventional bending device is configured to bend the pipe while the roller is riding and rotating around the fixed mold, so it requires a large force and the required rotational force at the beginning and the end of the rotation is different, resulting in uniform and stable rotation. It is impossible.

Rotational mold 4 having the curvature necessary to bend the pipe 100 by rotating the rotating mold 4 by the rotation of the horizontal axis (3) is rotated while biting and winding the pipe 100 and supporting roller ( 22) exerts a force to close the pipe 100 to the rotational mold and at the same time can be rotated, so that the pipe 100 is bent, even if the part touching the support roller 22 is slipped or excessive friction occurs It is also prevented.

Since the support roller 22 is installed in the support cylinder 20, when the protruding portion of the rotary mold 4 approaches, the support roller 22 is pushed out while applying a force, and the cushioning function is prevented by the characteristics of the cylinder by hydraulic or pneumatic pressure. As a result, the pipe 100 can be brought into close contact with the rotary mold 4.

When the pipe 100 is bent and touches the support roller 40 at the end, and the rotary mold 4 rotates continuously, the support roller 22 presses between the rotary mold 4 and the support roller 40. The pipe 100 is bent in the opposite direction to the rotary mold (4).

When the rotary mold 4 completes the normal rotation, the fixing device 41 acts. When the cylinder 42 acts, the fixing tool 44 presses the end of the pipe 100 for a short time and then returns. do.

After that, the supporting cylinder 20 acts, and the supporting roller 22, which is biting the pipe 100, retracts, and at the same time, the retaining cylinder 11 retracts and reverses the first action. ') Is opened so that the pipe 100 can be removed.

After the pipe 100 is removed, the driving cylinders 31 and 31 'return to the horizontal axis 3, thereby creating a state in which the following work can be performed.

According to the bending device of the present invention as described above, it has the advantage of improving the productivity and quality in many aspects, first, the bending device of the present invention is because the pipe bending action is made of a vertical type that the load of the pipe is bent It acts in the direction and has no influence on the bending, so that the torsion of the pipe can be solved at the source.

In addition, in the prior art, because the contact roller is bending while forcibly pushing the pipe while the mold is fixed, continuous stress acts excessively on the surface of the pipe, causing deformation or cracking on the surface due to friction and abrasion. According to the bending device according to the rotating mold while rotating the pipe while the support roller also rotates correspondingly to maintain the force to close the pipe to the rotating mold, which is continuous to the surface by bending the pipe Since the generated stress acts as a point movement, it is possible to precisely bend the desired shape without deformation or wear of the pipe, which leads to the advantage that the speed required for bending can be shortened while reducing the power required for bending. .

Therefore, according to the bending device according to the present invention, even if the power of the same size as before, the amount of bending can be increased twice as compared with the conventional, and the speed is also twice as fast as the conventional, so that it is more accurate than the conventional. It can produce 4 times more output while producing smooth and smooth products.

And for another reason that can increase the production speed, the transmission of the power for rotating the rotary mold is made by two rack gear and pinion can reduce the waste of power and transmit a stable power and thus a large power This allows you to bend a lot of pipes at the same time without having to add them.

In addition, the configuration for clamping the pipe can be improved to compress the pipe as a whole, thereby minimizing the occurrence of a flaw in the bite portion of the pipe and preventing the pipe from moving or detaching during bending.

As described above, the bending device according to the present invention can be said to be a useful invention that can greatly improve productivity and quality.

Claims (3)

The horizontal shaft (3) is installed in the upper part between the frame (2) installed on the left and right, and the rotating mold (4) having the desired bending curvature of the pipe (100) in the middle of the horizontal axis (3), The base (5) below the base cylinder (20) to configure the support roller 22 to the rod 21 by installing the support to be supported when the pipe 100 is bent, After the support 6 is protruded to the rear end of the rotating mold 4 of the horizontal shaft 3, the rear end of the pipe 100 is not bitten in the process of bending the pipe 100 directly above the upper rotating mold 4. When the side is to be bent in the opposite direction by the rotating mold (4) was installed a support roller 40 for supporting it, On top of that, a fixing device for pressing the end of the pipe 100 to maintain the bent shape for a while to prevent the pipe 100 from returning to its original state (spring back) at the time when the bending is completed. 41, but the fixing device 41 is installed so that the fixture 44 is raised and lowered when the cylinder 42 acts by installing the fixture 44 to the rod 43 after installing the cylinder 42 Pipe bending device characterized in that. The method of claim 1, The clamping device 10 is configured to fix the pipe 100 to the lower end of the rotating mold, but the bite cylinder 11 is installed at the rear end of the support 6, and below the support 6 of the bite cylinder 11. After the operation 12 constitutes a lever (12) for the movement of the lever and connects the platform 13 on which the tip of the pipe 100 is placed, Fixing fixtures 14 and 14 'are fixed to the upper edge of the platform 13, and the fixing fixtures 14 and 14' have inclined surfaces 15 which protrude downwards on opposite sides, respectively. On the inclined surface 15 side of the 14), the actuators 16 and 16 'having the opposite inclined surfaces 17 are respectively installed, and the platform 13 and the actuators 16 and 16' are respectively provided. Pipe bending device, characterized in that the spring 18 is installed between. The method of claim 1, The pinion 30 is formed at both ends of the horizontal shaft 3, and the driving cylinders 31, 31 'are installed at the lower side frames 2, respectively, and then the rods 32 of the driving cylinders 31, 31' are installed. Each rack gear (33) (33 ') is connected to the pinion (30) by engaging the drive cylinder (31) (31') alternately acting to rotate the horizontal axis (3) is configured to repeat the rotation. Pipe bending device characterized in that.