KR100319195B1 - Bending machine for pipe - Google Patents

Abstract

The present invention relates to a pipe bending device for bending to have various curvatures, such as a hinged pipe for a vehicle trunk lid, a fuel pipe.

According to the present invention, the side wall 20 is erected so as to face each other on both sides of the base 10, and the mold 30 having the channel 31 formed on the inner side of the side wall 20 is installed. The rotating shaft 40 is fixed to the side wall 20 so as to intersect the center, and the arm 50 is installed in the middle of the rotating shaft 40 so as to be located inside the two molds 30, At the front end, the cylinder fixing plate 51 is integrally attached so that both ends are located in front of the mold 30, and a rotation means is installed on the base 10 to rotate the arm 50 in the vertical direction, and the mold 30 The bending cylinder 70 having the roller 71 on the piston rod is mounted on the cylinder fixing plate 51 so as to correspond to the channel 31 of the (), and one end of the pipe p to be bent under the mold 30. The first clamp (80) for stably fixing the mold 30 to the mold 30, and the upper side of the mold 30 of the pipe (p) The second clamp 90 is mounted to hold the other end.

Description

Pipe Bending Device {BENDING MACHINE FOR PIPE}

The present invention relates to a hydraulic bending device for automatically bending a pipe having a circular cross section or a square cross section, and more particularly, to a pipe bending device for bending to have various curvatures such as a hinge pipe for a trunk lid of a vehicle and a fuel pipe. It is about.

Conventionally, a hydraulic bending machine and a CNC bending machine are provided as a device for bending a pipe, but these general bending devices have a disadvantage in that the pipe cannot be bent to have various curvatures, and when the pipe curvature is small, the bending angle is not accurate. The bending surface also has the disadvantage that it is not smooth. In addition, there is a disadvantage in that the production of a small amount of time per unit and the mold is difficult to replace whenever the shape of the pipe or finished product to be processed.

The present invention is to solve such a conventional problem, an object of the present invention is to be able to bend the pipe to have a variety of curvature, even if the curvature of the pipe is small and the bending angle of the banding device is formed smoothly the bending surface It's about making it available.

Another object of the present invention is to provide a bandine device having a large amount of production per unit time, can be mass-produced, and easy to replace the mold whenever the shape of the pipe is changed.

1 is a perspective view showing a configuration according to a first embodiment of the present invention.

2 and 3 are side cross-sectional view of the operating state of the present invention shown in FIG.

4 is a perspective view showing a configuration according to a second embodiment of the present invention.

5 is a side cross-sectional view of FIG. 4.

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

10; Expected 20; Sidewall 30; mold

31; Channel 32; Opening 40; Axis of rotation

41; Bearing 50; Arm 51; Cylinder fixing plate

60; Hydraulic cylinder 70; Banding cylinder 17; roller

80; First clamp 81; Head 90; 2nd clamp

91; Permanent magnet

The structural feature of the present invention is that the side walls 20 are vertically oriented so as to face each other on both sides of the base 10, and the channels 31 according to the bending form of the pipes p respectively on the inner side surfaces of the side walls 20, respectively. The mold 30 is formed, and both ends are fixed to the side wall 20 so as to be horizontal while substantially crossing the center of the mold 30, and the two molds 30 are fixed. The arm 50 is installed in the middle of the rotation shaft 40 so as to be located inside the cylinder shaft, and the cylinder fixing plate 51 is integrally formed at the front end of the arm 50 so that both ends are located in front of the mold 30. And a rotation means installed on the base 10 to rotate the arm 50 in the vertical direction, and the roller 71 on the piston rod so as to correspond to the channel 31 of the mold 30. Mounting the bending cylinder 70 having a cylinder fixing plate 51, the lower side of the mold 30 Is equipped with a first clamp (80) for stably fixing one end of the pipe (p) to be bent to the mold 30, the other end of the pipe (p) is completed bending the upper end of the mold 30 It is equipped with a second clamp 90 for holding.

Hereinafter, two preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment

1 is a perspective view showing a configuration according to a first embodiment of the present invention, Figures 2 and 3 are side views of the operating state of the present invention shown in FIG.

As shown in FIG. 1, the side walls 20 are erected vertically so as to face each other on the base 10, and the channels 31 according to the bending form of the pipes p are placed on the inner side of the side walls 20, respectively. ), A mold 30 is formed.

Exemplary mold 30 is for forming a hinged pipe (p) for the trunk lid of the vehicle, the rear end of each mold 30 is bolted to the inner surface of the side wall 20 and the line of each mold 30 The channel 31 is opened in a U-shape through the cross section and a part of the bottom surface, and the pipe p having a rectangular cross section is formed into two pieces at a time. If the pipe having a circular cross section is to be molded, the channel 31 may be formed to be open in a U-shape.

The rotary shaft 40 is rotatably fixed to the side wall 20 through the bearing 41 as a medium, and the opening 32 opened rearward from the center of the mold 30 through which the rotary shaft 40 passes. ) Is formed to facilitate the disassembly and assembly of the mold (30).

The arm 50 is integrally coupled to the middle outer circumferential surface of the rotation shaft 40 in the orthogonal direction of the rotation shaft 40. The tip extends longer than the tip of the mold 30 and has a rectangular cylinder fixing plate 51. It is attached to this arm 50 at right angles.

The illustrated rotation means uses the hydraulic cylinder 60 to connect the piston rod to the rear end of the arm 50 and pivotally installs the base 10 to the arm 50 in accordance with the operation of the hydraulic cylinder 60. It can be rotated up and down.

The bending cylinders 70 are installed at right angles at both ends of the cylinder fixing plate 51, and each cylinder rod directed toward the channel 31 of the mold 30 corresponds to the shape of the pipe p to be formed, respectively. The roller 71 can be provided to press the outer surface of the pipe p safely and precisely.

The first clamp 80 is fixed to the inner side of the side wall 20 so as to be located below each mold 30, and corresponds to the shape of a pipe p that is formed on the rod by using a solenoid, hydraulic or pneumatic cylinder. The head (81) of the shape (c-shaped) is mounted so that one end of the pipe (p) can be stably fixed to the mold (30).

The second clamp 90 is fixed to the inner side of the side wall 20 so as to be located above each mold 30. The second clamp 90 uses a solenoid, hydraulic or pneumatic cylinder, and mounts a permanent magnet 91 on the rod to bend. Allow the other end of the pipe (p) to complete the work.

Referring to the operation of the present invention having such a structure as follows.

As shown in FIG. 2, the hydraulic cylinder 60, which is provided as a rotating means so that the bending cylinder 70 is positioned below the mold 30, is located under the mold 30 to be processed. One end of the cross-sectional rectangular pipe p is placed abuts against the lower channel 31 of the mold 30. At this time, the pipe (p) is to form a hinged pipe (p) for the trunk lid of the vehicle, which is overlapped two by two to face the channel 31 of the mold 30, and then the first clamp (80) Operation extends the rod, causing the head 81 to secure the end of the pipe p and the pipe p to be leveled, thus completing the work readiness.

In this state, the bending cylinder 70 is operated at the same time as or immediately after the bending cylinder 70, and the hydraulic cylinder 60 provided by the rotating means is operated to perform bending of the pipe p.

That is, the operation of the bending cylinder 70 extends the piston rod while the roller 71 at the tip of the piston rod maintains the operation of pressing the fixed side of the pipe p. The piston rod proceeds downward and shrinks. Accordingly, as the arm 50 rotates counterclockwise in the drawing, the bending cylinder 70 pivots upward, thereby pushing the pipe p at a constant pressure to the channel 31 of the mold 30. Therefore, while the pipe p is in continuous contact with the channel 31 of the mold 30, the bending is completed in the form of the hinge pipe.

As shown in FIG. 3, when the bending of the pipe p is completed, the hydraulic cylinder 60 stops operation and operates the second clamp 90 which is waiting on the upper side of the mold 30 to permanently present the rod. The upper end of the pipe (p) is held by the magnetic force of the magnet (91), and after the piston rod is reduced by the operation of the bending cylinder 70 is spaced apart from the bent pipe (p), and then the operation of the rotating cylinder As the piston rod is contracted, the arm 50 is rotated clockwise to stop at the work standby state, that is, the lower side of the mold 30. Thereafter, the banded pipe p is manually pulled out from the channel 31 of the mold 30 and the second clamp 90 is operated to return to the initial state, thereby completing the bending process once.

As such, four hinge pipes (p) can be produced by one bending operation, and may vary depending on the performance of the bending device, but the bending time is completed in about 10 seconds to allow mass production per unit working time.

Second Embodiment

4 is a perspective view showing a configuration according to a second embodiment of the present invention, Figure 5 is a side cross-sectional view of FIG.

Since the configuration and operation are similar to those of the first embodiment, the configuration and operation description of the same parts as the first embodiment will be omitted.

That is, in the first embodiment, the hydraulic cylinder 60 used as the rotation means is connected to the arm 50 by linkage to convert the linear motion into the rotational motion. In the second embodiment, the rotation means is linear with the rack and pinion. It was to convert the movement into rotational movement.

As illustrated, the main body of the hydraulic cylinder 60a is fixed to the base 10, while the piston rod is equipped with a rack gear 60b, and the pinion gear 60c is mounted on the outer circumferential surface of the rotating shaft 40 to provide hydraulic pressure. As the cylinder 60a is driven, the arm 50 is engaged with the gear and rotates to perform bending of the pipe p.

As such, the present invention has the advantage of bending the pipe p so that the bending cylinder 70 has various curvatures according to the shape of the mold 30 while turning from one end of the pipe p to the other end. Even when the curvature of p) is small, the roller 71 of the bending cylinder 70 can continuously shape along the curvature of the mold 30 to accurately shape the bending angle of the pipe p and the rolling of the roller 71 There is an advantage that the bending surface of the pipe (p) can be smoothly formed without the surface friction by the movement.

In addition, since the two molds 30 are mounted so that a plurality of pipes (p) can be mounted at one time, the mold 30 can be formed on the sidewall 20 in a large amount of production per unit time, and is free from inclination with peripheral components. Since it is mounted there is an advantage that can easily replace the mold (30).

Claims (5)

The mold 30 in which the side wall 20 is vertically oriented so as to face both sides of the base 10, and the channel 31 is formed on the inner side of the side wall 20 so as to correspond to the bending form of the pipe p, respectively. ) And fix both ends of the rotation shaft 40 to the side wall 20 so as to be horizontal while crossing the center of the mold 30, and the rotation shaft to be positioned inside the two molds 30. The arm 50 is provided in the middle of the 40, and the cylinder fixing plate 51 is integrally attached to the front end of the arm 50 so that both ends are located in front of the mold 30. 10) a bending cylinder 70 having a roller 71 on the piston rod so as to rotate the arm 50 in the up and down direction by installing a rotating means thereon and corresponding to the channel 31 of the mold 30. Mounted on the cylinder fixing plate 51, and a pipe (p) to be bent under the mold (30). And a first clamp 80 for stably fixing one end of the mold to the mold 30, and a second portion for holding the other end of the pipe p completed with bending by the magnetic force on the upper side of the mold 30. Pipe bending device characterized in that the clamp 90 is mounted. According to claim 1, wherein the rotating means is connected to the rear end of the arm (50) using a hydraulic cylinder (60) and pivotally installed on the base (10) in accordance with the operation of the hydraulic cylinder (60) Pipe bending device characterized in that configured to be rotated in the vertical direction to the arm (50). 2. The rotating means secures the main body of the hydraulic cylinder (60a) to the base (10) while the piston rod is equipped with a rack gear (60b), and the pinion gear (60c) on the outer circumferential surface of the arm (50). Pipe bending device, characterized in that the arm 50 is configured to rotate by engaging the gear in accordance with the driving of the hydraulic cylinder (60a) by forming a) According to claim 1, characterized in that the opening 32 is opened from the center of the mold 30 through which the rotating shaft 40 passes to facilitate the disassembly and assembly of the mold 30. Pipe banding device. According to claim 1, wherein the second clamp (90) uses a solenoid, hydraulic or pneumatic cylinder and the permanent magnet 91 is mounted on the rod can hold the other end of the pipe (p) completed the bending work by magnetic force Pipe bending device, characterized in that.