KR102111545B1 - Pipe bending device - Google Patents

Abstract

The present invention relates to a pipe bending apparatus. According to the present invention, the pipe bending apparatus comprises: a pressurizing unit reciprocating vertically; an upper mold unit coupled to a lower part of the pressurizing unit; a lower mold unit which comes into contact with a lower part of the upper mold unit; a bed unit located below the lower mold unit to support; and a reduction unit located on one side of the upper mold unit and the lower mold unit.

Description

Pipe bending device

The present invention relates to a pipe bending apparatus, and more particularly, the upper die unit coupled to the lower portion of the pressing unit reciprocating in the vertical direction descends to the lower die unit located at the lower portion, and presses the pipe located on the upper surface of the lower die unit. It relates to a pipe bending apparatus characterized in that to reduce the diameter of the pipe by reducing the diameter of the pipe to advance the reduction unit provided on one side of the pipe at the same time as the pipe is bent by forming a compressed state.

Generally, a pipe is mainly used for an exhaust pipe that exhausts exhaust gas generated from an engine of a vehicle.

Such a pipe mainly uses a pipe including a hollow portion to respond to an external force acting from the outside, and increases or decreases the diameter of the end portion of the pipe to produce an exhaust pipe, thereby securing rigidity against moments generated by external force. Is done.

Accordingly, as a type of bending machine for bending a pipe in order to manufacture an exhaust pipe according to a vehicle type, a typical machining method is a machining method using a welding fitting or a machining method using a chuck and clamp.

First, it is a processing method of manufacturing a single pipe having a predetermined curvature using welding between a pipe and a pipe using a welding fitting.

However, the processing method using a welding fitting has a problem in that a post-processing process that evens an outer surface of a pipe after welding is additionally added, so that a manufacturing time is prolonged, and a pipe produced using welding is not recycled.

Next, in the machining method using the chuck and the clamp, the one end of the pipe, which is the material to be bent, is fixed to the bending chuck by using the bending chuck and the bending clamp, the other end of the pipe is fixed by the bending clamp, and then the bending clamp is This is a configuration that allows the pipe to bend at a predetermined angle by turning, and is most often used as a device for bending the pipe.

However, in the process of bending the pipe using the bending chuck and the bending clamp, both ends of the pipe to which the bending chuck and the bending clamp are fixed must be crushed and cut, resulting in material loss, and a separate process for cutting both ends of the pipe is added. Therefore, there is a problem in that work efficiency is reduced.

As described above, due to the characteristics of the exhaust pipe in which various parts should be bent at various angles, several bending operations are required, resulting in a problem that the working speed is lowered and the production cost is increased.

In addition, the exhaust pipe for a vehicle coupled to the muffler has a problem in that after a bending operation, a majority of processes requiring the diameter of the pipe to be enlarged at one side of the pipe are required, and thus a number of processes are required after the pipe bending operation.

Accordingly, there is a need to develop a pipe bending apparatus that does not require post-treatment and post-processing to solve this problem.

In addition, there is an increasing need for the development and manufacture of equipment for unifying the process capable of reducing the diameter of the pipe at the same time as the pipe bending operation.

Republic of Korea Registered Patent Publication No. 10-1817135

The present invention relates to a pipe bending apparatus, and more particularly, the upper die unit coupled to the lower portion of the pressing unit reciprocating in the vertical direction descends to the lower die unit located at the lower portion, and presses the pipe located on the upper surface of the lower die unit. The compression unit is formed to bend the pipe, and at the same time, the reduction unit provided on one side of the pipe advances to reduce the diameter of the pipe, thereby attempting to unify the process.

In order to achieve the object of the present invention, the pipe bending apparatus according to the present invention includes a pressing unit that reciprocates in a vertical direction; A upper mold unit coupled to the lower portion of the pressing unit; A lower mold unit abutting in a shape corresponding to a lower portion of the upper mold unit; A bed unit positioned under the lower mold unit to support the pressing unit, the upper mold unit, and the lower mold unit; And a reduction unit positioned on one side of the upper mold unit and the lower mold unit, and when the upper mold unit pressurizes the lower mold unit, a pipe placed on the lower mold unit is bent while simultaneously reducing the shrink unit. It characterized in that the diameter of one side of the pipe is reduced by.

In addition, the upper die unit of the pipe bending apparatus according to the present invention has a predetermined thickness in the vertical direction, and has an upper groove recessed in a shape corresponding to the pipe, and the upper groove has a curved shape It is characterized by.

In addition, the lower die unit of the pipe bending apparatus according to the present invention is provided in a corresponding shape of the upper die unit, provided with a lower groove recessed in a shape corresponding to the pipe, the lower groove is a curved shape Characterized by having.

In addition, the reduction unit of the pipe bending apparatus according to the present invention, the first body portion coupled to the top of the bed unit; A second body portion coupled to the first body portion; And it is coupled to the upper portion of the second body portion, the driving portion for reducing the diameter of the pipe in a shape surrounding the outer surface only a predetermined length on one side of the pipe; characterized in that it comprises a.

In addition, the drive portion of the pipe bending apparatus according to the present invention, a cylindrical head portion including a hollow portion; And a transfer portion coupled to the rear of the head portion, wherein the transfer portion is moved forward and backward to move the head portion.

In addition, the head portion of the pipe bending apparatus according to the present invention, the cylindrical shape of the shrinking block including a hollow portion; A support block coupled along an outer surface of the reduction block; A cylindrical lift passing through the hollow portion of the reduction block; A ball coupled to one side of the lift, and inserted into the inner side of the pipe at one side of the pipe; A first punch coupled to the other side of the lift; And a second punch coupled to one side of the shrinking block and the support block, wherein the inner side of the pipe is supported by contact with the ball at one side of the pipe, and out of the pipe. When the reduction block is advanced along the side, the diameter of the pipe is reduced.

In addition, the upper mold unit and the lower mold unit of the pipe bending apparatus according to the present invention includes a first groove and a second groove that are recessed at one side, but when the head portion is moved forward from the transfer unit , It is inserted into the first groove and the second groove.

According to the present invention, since it has a height in the vertical direction due to the first to fourth leg portions of the bed unit, an operator can reduce unnecessary work operations such as bowing down in the pipe bending operation, thereby reducing the working time. It has the effect.

In addition, at the same time that the upper mold unit and the lower mold unit are in a compressed state, when the reduction unit, which will be described later, abuts on one side of the pipe, interference does not occur due to the first groove and the second groove, thereby reducing unnecessary friction. It works.

In addition, the central axis of the driving unit is the same as the central axis of the pipe on one side of the pipe, so that the step of aligning the central axis for the pipe diameter reduction operation is omitted, thereby reducing the working time and increasing the working efficiency.

In addition, when a part of the rib part contacts one surface of the second body part and moves the head part forward and backward, it acts as a guide so as not to deviate from a predetermined central axis, thereby preventing a defect rate in which the pipe thickness is different. There is.

In addition, the end of the collapsible block is rounded, and when advancing while adhering along the outer surface from one side of the pipe, it is possible to reduce the surface frictional force and secure worker safety.

In addition, when the support block is coupled along the outer surface of the collapsed block and moves forward toward the pipe, there is an effect capable of responding to the stress generated in the pipe.

In addition, there is an effect that can be prevented by holding the defect rate, such as warpage that may occur when the diameter of the pipe is reduced on one side of the pipe by inserting a spherical ball inside the pipe.

In addition, since the pipe is compressed and bent through the upper mold unit and the lower mold unit, the diameter of the pipe can be reduced on one side of the pipe, so the process is improved by bending and reducing the diameter of the pipe in one operation. As a result, production efficiency is increased and space utilization is increased.

In addition, since the upper mold unit and the lower mold unit fix the pipe at the same time as pressing, the outer surface of the pipe is fixed once more through the rubber part of the fixing unit, thereby increasing the fixing force of the pipe.

1 is a front view of a pipe bending apparatus according to the present invention.
2 is a cross-sectional view when a pipe is inserted between the upper mold unit and the lower mold unit of the pipe bending apparatus according to the present invention.
3 is a cross-sectional view when the upper die unit of the pipe bending apparatus according to the present invention presses the lower die unit.
4 is a front view of a reduction unit of the pipe bending apparatus according to the present invention.
Figure 5 is a cross-sectional view when the contraction block of the head portion of the pipe bending apparatus according to the present invention and one side of the pipe contact.
6 shows an example of use of the head portion of the pipe bending apparatus according to the present invention.
7 is an enlarged view of 'A' of the head portion of the pipe bending apparatus according to the present invention.
8 shows another embodiment of a pipe bending apparatus according to the present invention.
9 is an enlarged view of a fixing unit of a pipe bending apparatus according to the present invention.

Hereinafter, with reference to the drawings of the present invention will be described in detail. The embodiments introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to ordinary practitioners. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. And, in the drawings, the size and thickness of the device may be exaggerated for convenience. Throughout the specification, the same reference numbers indicate the same components.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and the ordinary skill in the art to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification. The size and relative size of layers and regions in the drawings may be exaggerated for clarity of explanation.

The terminology used herein is for describing the embodiments, and thus is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, "comprise" and / or "comprising" refers to the components, steps, operations and / or elements mentioned above, the presence of one or more other components, steps, operations and / or elements. Or do not exclude additions.

Definitions of terms used below are as follows. The "longitudinal direction" is the x-axis direction based on FIG. 1, and the "vertical direction" is the z-axis direction based on FIG. 1. In addition, the inner side means the side closer to the central axis. In addition, "front" refers to the side closer to the first leg portion of the bed unit based on FIG. 1, and "rear" refers to the side closer to the second leg portion of the bed unit based on FIG. do. In addition, "upper" refers to the side closer to the upper surface of the upper die unit based on FIG. 1, and "downward" refers to the side closer to the lower surface of the bed unit based on FIG.

1 is a front view of a pipe bending apparatus according to the present invention. 2 is a cross-sectional view when a pipe is inserted between the upper mold unit and the lower mold unit of the pipe bending apparatus according to the present invention. In addition, Figure 3 is a cross-sectional view when the upper mold unit of the pipe bending apparatus according to the present invention presses the lower mold unit. 4 is a front view of the reduction unit of the pipe bending apparatus according to the present invention. In addition, Figure 5 is a cross-sectional view of the contraction block of the head portion of the pipe bending apparatus according to the invention and one side of the pipe. In addition, Figure 6 shows an embodiment of use of the head portion of the pipe bending apparatus according to the present invention. 7 is an enlarged view of 'A' of the head portion of the pipe bending apparatus according to the present invention. In addition, Figure 8 shows another embodiment of the pipe bending apparatus according to the present invention. 9 is an enlarged view of the fixing unit of the pipe bending apparatus according to the present invention.

The pipe bending apparatus according to the present invention includes a pressing unit 100, an upper mold unit 200, a lower mold unit 300, a bed unit 400, a shrinking unit 500, and a fixing unit 600.

Hereinafter, the pressing unit 100 will be described with reference to FIG. 1.

The pressing unit 100 has a panel shape and a structure having a predetermined thickness in the vertical direction. In addition, the pressing unit 100 is preferably formed in a circular column extending in the vertical direction from the center of the panel shape is coupled to the upper die unit 200 to be described later. In addition, it is preferable that each corner is provided with a circular groove through which known parts can pass so that they can be joined by known coupling means such as bolts, rivets, and welding.

Therefore, although not shown in the drawings and a plurality of grooves located at the corners, a structure capable of moving the pressing unit 100 in the vertical direction is formed by being coupled to a driving device capable of moving the pressing unit 100 in the vertical direction. .

As described above, as the press working in the form of pressing from the top to the bottom, compared to other production methods, it is relatively easy and can be processed quickly, thereby reducing the process time and improving productivity.

Thus, when the pressing unit 100 is driven in the vertical direction by a driving device not shown in the drawing, the upper die unit 200 coupled directly to the lower portion of the pressing unit 100 simultaneously presses the pressing unit 100 Together with it, a structure that moves up and down in the vertical direction is formed.

Hereinafter, the winning mold unit 200 will be described with reference to FIGS. 1 and 2.

The upper mold unit 200 is coupled to the lower portion of the pressing unit 100, and includes an upper holder portion 210 and an upper die portion 220.

The upper holder portion 210 has a shape of a rectangular parallelepiped extending in a vertical direction by a predetermined length.

The upper die portion 220 is coupled to the lower surface of the upper holder portion 210, and is formed to extend downward from the lower surface of the upper holder portion 200 toward the lower mold unit 300, which will be described later. .

Therefore, when the upper mold unit 200 receives power from the pressing unit 100 and moves up and down in the vertical direction, it is known by bending the pipe 10 into a structure that presses the lower mold unit 300 to be described later. It can be produced with a muffler. Effects on this will be described later.

At this time, the pipe 10 is a pipe that is commonly used in the current automobile industry, and is a standardized product, and a detailed description thereof will be omitted.

In addition, the upper die portion 220 is provided with an upper groove 221, a first groove 222, and a fixed portion insertion upper groove 223.

The upper groove 221 is preferably recessed in a shape corresponding to the pipe 10 along the longitudinal direction at the center point of one side from the lower surface of the upper die portion 220. At this time, one side of the upper die portion 220 refers to the opposite direction from the point where the reduction unit 500 is located, and the other side of the upper die portion 220 refers to the reduction unit 500. Point.

In addition, the upper groove 221 is curved, it is preferable to have a slope toward the upper holder portion 220 when it reaches the center starting from one side of the upper die portion 220.

That is, the upper groove 221 is recessed in the shape of a semicircle that is a shape corresponding to the outer surface of the pipe 10, and thus includes a slope having a predetermined angle, so that the pipe 10 can be bent.

As described above, when the pipe 10 in the pipe bending apparatus according to the present invention is manufactured from a straight pipe to a pipe having a slope in order to be applied to an exhaust system of a passenger car, the upper groove 221 in the upper die 200 It is possible to bend the pipe 10 in a single process to press the lower mold unit 300 to be described later has the effect that the working time is shortened, the efficiency of the work is increased.

The first groove 222 is preferably cut only a predetermined length in the longitudinal direction from the other side of the upper die portion 220 to include a hollow portion.

Therefore, when the upper mold unit 200 and the lower mold unit 300 form a compressed state, and when the reduction unit 500, which will be described later, abuts on one side of the pipe 10, due to the first groove 222 Since there is no interference, there is an advantage that unnecessary friction can be reduced.

Hereinafter, the lower mold unit 300 will be described with reference to FIGS. 1 and 2.

The lower mold unit 300 has a lower holder portion 310 and a lower die portion 320 and is coupled to the upper portion of the bed unit 500 to be described later in a shape corresponding to the upper mold unit 200. In addition, it is preferable to be located at the lower portion of the upper mold unit 200 to have a crimping structure by forming the same line in the vertical direction with the edge of the lower surface of the upper mold unit 200.

The lower holder 310 is preferably coupled to the upper surface of the bed unit 400 in the same shape as the upper holder 210. Therefore, when the upper mold unit 200 descends toward the lower mold unit 300 and abuts, the advantage of increasing the aesthetic sense due to the upper holder portion 210 and the lower holder portion 310 contacting the same shape is increased. have.

The lower die part 320 is coupled to the upper surface of the lower holder part 310 and has a shape corresponding to the upper die part 220, the lower groove 321, the second groove 322, and the fixing part insertion lower groove 323 ).

The lower groove 321 is preferably recessed in a shape corresponding to the pipe 10 along the longitudinal direction at the center point of one side from the upper surface of the lower die portion 320. At this time, one side of the lower die portion 320 refers to the opposite direction from the point where the reduction unit 500 is located, and the other side of the lower die portion 320 refers to the reduction unit 500. Point.

In addition, the lower groove 321 is a curved shape, it is preferable to have a slope toward the upper surface of the lower die portion 320 when starting at one side of the lower die portion 320 and reaching the center.

That is, the lower groove 321 is recessed in the shape of a semicircle that is a shape corresponding to the outer surface of the pipe 10 to include a slope having a predetermined angle, so that the pipe 10 can be bent.

Therefore, when the upper mold unit 200 descends toward the lower mold unit 300 to form a crimp state, the upper groove 221 and the lower groove 321 abut into the hollow portion of the outer surface shape of the pipe 10 Is formed.

In addition, the inclined surfaces of the upper groove 221 and the lower groove 321 have the same slope, and are preferably located on the same line.

Therefore, the outer surface of the upper semicircle with respect to the outer surface of the pipe 10 is in contact with the upper groove 221, and the outer surface of the lower semicircle of the pipe 10 is in contact with the lower groove 321, thereby being pressurized. It is possible to bend the pipe 10 in a curved shape.

The second groove 322 is preferably cut only a predetermined length in the longitudinal direction from the other side of the lower die portion 320 to include a hollow portion.

Therefore, when the upper mold unit 200 and the lower mold unit 300 form a compressed state, and when the reduction unit 500, which will be described later, abuts on one side of the pipe 10, the first groove 222 and the first groove 222 2 Because the groove 322 does not generate interference, there is an effect of reducing unnecessary friction.

Hereinafter, an embodiment of using the upper mold unit 200 and the lower mold unit 300 will be described with reference to FIGS. 2 and 3.

First, the pipe 10 is placed on the upper surface of the lower die 320 of the lower mold unit 300 so as to contact the lower groove 321.

Next, the upper mold unit 200 moves downward in the direction of the lower mold unit 300 to press the lower mold unit 300.

At this time, the upper mold unit 200 moves downward to press the lower mold unit 300, and at the same time, the reduction unit 500, which will be described later, fixes the pipe 10 at one side of the pipe 10 to fix the pipe 10 ), It is desirable to carry out the inner diameter reduction work. Descriptions and effects related to this will be described later.

As described above, after the pipe 10 is positioned between the upper mold unit 200 and the lower mold unit 300, the upper mold unit 200 is pressed and the upper mold unit 200 and the lower mold unit 300 are placed. In order to make the crimped state, the working time is shortened to a minimum step of pressing the upper die unit 200 in the vertical direction, thereby increasing productivity.

Hereinafter, the bed unit 400 will be described with reference to FIG. 1.

The bed unit 400 is coupled to the lower surface of each corner point of the base portion 410, the base portion 410, which is a rectangular panel shape formed to extend in the longitudinal direction, and each first leg formed to extend in the vertical direction It is preferably provided with a portion 420, a second leg portion 430, a third leg portion 440 and a fourth leg portion 450.

As described above, the bed unit 400 supports the upper mold unit 200, the lower mold unit 300, and the reduction unit 500 to be described later in a known desk shape, and has a height in a vertical direction, thereby allowing an operator In the pipe bending work, unnecessary work motions such as bowing down can be reduced, thereby reducing the working time.

Hereinafter, the reduction unit 500 will be described with reference to FIG. 4.

The reduction unit 500 is provided with a first body portion 510, a second body portion 520 and a driving portion 530. The first body portion 510 has a rectangular parallelepiped shape, has a predetermined thickness in the vertical direction, and is coupled to the upper surface of the bed unit 400 to move forward and backward in the upper mold unit 200 and the lower mold unit 300 direction. It is desirable to do. Effects on this will be described later.

The second body portion 520 is a rectangular parallelepiped and has a predetermined thickness in the vertical direction, and is preferably coupled to the top of the first body portion 510.

At this time, the length of the second body portion 520 in the longitudinal direction is preferably longer than the length of the first body portion 510 in the longitudinal direction.

Therefore, when the driving unit 530, which will be described later, is coupled to the upper portion of the second main body portion 520, when moving forward and backward through the guide rail, the safety distance is secured to a longer length than the first main body portion 510. It has the advantage of increasing stability. At this time, the guide rail coupled to the upper surface of the second body portion 520 is a well-known guide rail commonly used in the mold industry that can promote forward and backward movement, and may be a block-type LM guide. This is a known guide rail, and is a known technique, so detailed description will be omitted. In addition, in the reduction unit 500, forward refers to the side toward the upper mold unit 200 and the lower mold unit 300, and backward is the one away from the upper mold unit 200 and the lower mold unit 300. Refers to.

The driving unit 530 has a cylindrical shape, and is coupled to the upper surface of the second body unit 520 to perform forward and backward movement.

At this time, since the inner diameter is reduced on one side of the pipe 10 through the forward and backward movement of the driving unit 530, it has the same central axis as the pipe 10 located on the upper surface of the lower die 320 It is desirable.

Therefore, by reducing the operation operation of aligning the central axis to be inserted into the inner diameter of the pipe 10 at one side of the pipe 10 by the driving unit 530, the working time is shortened and the working efficiency is increased, as well as the upper die unit ( 200) when the lower mold unit 300 is pressed, it serves to fix the pipe 10 at one side, thereby reducing the defect rate caused by bending or bending of the pipe 10.

Hereinafter, the driving unit 530 will be described with reference to FIGS. 4 and 5.

The driving part 530 is provided with a head part 531, a transport part 532 and a rib part 533.

The transfer part 532 is coupled to a portion of the upper surface of the second body part 520 in a rectangular parallelepiped shape. In addition, the second main body portion 520 is moved forward and backward through a guide rail overlapped with the upper surface, and the guide rail is not shown in the drawing, but is controlled by a driving device and serves to transport the head portion 531 Do it.

The head portion 531 is cylindrical, coupled on one side of the transfer portion 532, has the same central axis as the pipe 10, and is preferably located in contact with one side of the pipe 10.

Therefore, even if only the operation of the conveying unit 532 advancing in the direction of the pipe 10 through the guide rail located on the upper surface of the second body unit 520, the head unit 531 abuts along the outer surface of the pipe 10 Since the diameter of the pipe 10 can be reduced, there is an advantage of shortening the working time by reducing the process.

The rib portion 533 is positioned at a predetermined distance along the outer surface of the head portion 531, and preferably has a cylindrical shape and a predetermined thickness in the longitudinal direction.

That is, in the state in which the head portion 531 passes through and penetrates the hollow portion in the shape of a disk including the hollow portion, the head portion 531 moves forward and backward.

Therefore, the rib portion 533 is a guide portion when the head portion 531 moves forward and backward in the upper mold unit 200 and the lower mold unit 300 direction, and as a guide, the head portion 531 deviates from the defined central axis. By not doing so, when the inner diameter of the pipe 10 is axially piped, there is an effect of preventing a defective rate in which the thickness of the pipe 10 is different.

In addition, it is preferable that a part of one side of the rib portion 533 contacts the second body portion 520.

Therefore, when the conveying portion 532 retracts in the opposite direction of the pipe 10, the rib portion 533 is in contact with one side of the second body portion 520 to prevent the head portion 531 from falling. It has an effect.

Hereinafter, the head unit 531 will be described with reference to FIGS. 5 and 6.

The head portion 531 is provided with a reduction block 5311, a support block 5312, a lift 5313, a ball 5314, a first punch 5315 and a second punch 5316.

The collapsible block 5311 is in contact with one side of the second punch 5316 to be described later in a cylindrical flat shape including a hollow portion. In addition, the reduction block 5311 has the same central axis as the pipe 10.

Hereinafter, the reduced block 5311 will be described in detail with reference to FIG. 7.

7 is an enlarged view of 'A' in FIG. 6. As shown in FIG. 7, the shrinking block 5311 has a cylindrical shape including a hollow portion, and a lift 5113 and a ball 5314, which will be described later, are inserted through the hollow portion of the shrinking block 5311. In addition, it is preferable that the end is formed on one side of the reduction block 5311. Here, one side of the reduction block 5311 refers to a side closer to the pipe 10 direction, and the other side of the reduction block 5311 refers to a side to which the second punch 5316 is coupled. do.

That is, only one predetermined length is recessed in the horizontal direction and the vertical direction on one side of the reduction block 5311, and a step is formed on one side of the reduction block 5311.

Accordingly, as shown in FIG. 7, a thickness such as referenced 'd' is generated along the inner surface of the reduction block 5311, and the length of the thickness of referenced 'd' is the pipe at one side of the pipe 10 ( It is preferable that the difference length of the diameter reduced from the diameter of 10) is the same.

In other words, the diameter of the pipe 10 is reduced only a predetermined length in the longitudinal direction from one side of the pipe 10, as the outer diameter of one side of the pipe 10 to be reduced and the inner diameter of the reduction block 5311 are the same. One side of the pipe 10 is inserted along the inner surface of the reduction block 5311 to reduce the diameter.

 In addition, as shown in FIG. 7, it is preferable that the stage of the reduction block 5311 is rounded like R1, R2 and R3.

Therefore, when the inner surface of the reduction block 5311 along the outer surface at one side of the pipe 10 advances while coming into contact, there is an effect of reducing the surface frictional force with the outer surface of the pipe 10. In addition, since the diameter of the pipe 10 is reduced as the pipe 10 moves along the rounded end of the reduction block 5311, the diameter is finally reduced on one side of the pipe 10 in a corresponding shape. According to this, the aesthetic sense of the viewer is increased, and the risk factor is eliminated to secure the safety of the worker.

The support block 5312 is a cylindrical shape including a hollow portion, and the outer surface of the reduction block 5311 is preferably coupled to the inner surface.

Accordingly, when the reduction block 5311 is advanced along the outer surface from one side of the pipe 10, the support block 5312 is generated from the pipe 10 by being coupled along the outer surface of the reduction block 5311 There is an advantage that can cope with stress.

That is, when the inner surface of the shrinking block 5311 comes in contact with the outer surface of the pipe 10 from one side of the pipe 10 and advances to reduce the diameter of the pipe 10, the pipe 10 is a reduced block There is an advantage that can be countered by the stress generated to resist the force of (5311) to keep the circular shape by supporting blocks 5312 along the outer surface of the reduction block (5311).

The second punch 5316 is preferably a cylindrical shape including a hollow portion and is coupled to the other side of the reduction block 5311 and the support block 5312.

Therefore, the second punch 5316 reduces the power received from the transfer unit 532 so that the reduction block 5311 can be advanced toward the pipe 10 in order to reduce the diameter at one side of the pipe 10. (5311) and the support block (5312) will serve to deliver.

The lift 5313 has a cylindrical shape and is inserted through the inside of the reduction block 5311. In addition, it is preferable that a ball 5314 to be described later is coupled to one side of the lift 5313, and a first punch 5315 to be described later is coupled to the other side of the lift 5313. Here, the one side of the lift 5313 refers to a direction close to the pipe 10, and the other side of the lift 5313 refers to a direction opposite to the pipe 10.

Accordingly, a structure in which the lift 5313 receives power by the first punch 5315 and transmits power to the ball 5314 is established.

Ball 5314 is spherical, it is preferable that it can be inserted into the inside of the pipe 10 is coupled to one side of the lift (5313).

Therefore, the diameter of the pipe 10 on one side of the pipe 10 is reduced by only a predetermined length in the longitudinal direction, there is an effect that can prevent the defect rate such as warpage.

That is, since the diameter is reduced only by a predetermined length in the longitudinal direction from one side of the pipe 10, the defect rate, such as bending occurring at the point where the diameter changes, is supported by the spherical shape of the ball 5314 on the inner surface of the pipe 10 By doing so, there is an effect that can prevent the occurrence of the defect rate.

The first punch 5315 is cylindrical, and it is preferable that a lift 5313 is coupled to one side and a transfer part 532 is coupled to the other side. Here, one side of the first punch 5315 refers to the side closer to the pipe 10, and the other side of the first punch 5315 refers to the side away from the pipe 10.

Therefore, the first punch 5315 transmits the power received from the transfer part 532 to the ball 5314 so that the ball 5314 can be inserted into the inner surface of the pipe 10 at one side of the pipe 10. (5314) will serve to transmit power to move forward.

As described above, the pipe 10 is compressed and bent through the upper mold unit 200 and the lower mold unit 300, and at the same time, the diameter of the pipe can be reduced on one side of the pipe 10. The effect is that the process is improved.

In other words, the upper part of the bed unit 400 can simultaneously perform bending and diameter reduction operations of the pipe 10 through the upper mold unit 200, the lower mold unit 300, and the shrinking unit 500, thereby utilizing space. This increases the effect.

In addition, by using a conventional bending chuck and a bending clamp, both ends of the pipe 10 are fixed, and the upper mold unit 200 has a problem of cutting both ends of the pipe 10 caused by the technique of bending while turning. It is a structure that wraps the entire outer surface of the pipe 10 and bends it by pressing it toward the lower mold unit 300 to form a crimp state. As well as increasing the surface workability, it is not necessary to cut both ends of the pipe 10. It has the effect of reducing material loss.

At the same time, the cutting operation at both ends of the pipe 10 is omitted, and the reduction unit 500 is additionally provided on one side of the upper mold unit 200 and the lower mold unit 300, so that the pipe (10) inside the pipe ( Since the process of reducing the diameter of 10) can be performed at the same time, the process is improved to increase work efficiency, remove unnecessary molds, and reduce the labor force, thereby reducing the cost.

In addition, since the bending and diameter reduction work of the pipe 10 is finished in one process at a position of a mold, the production speed is increased, the working time is improved, and the process is rapidly progressed to improve product production efficiency. Follow.

Hereinafter, an embodiment of using the head unit 531 will be described with reference to FIGS. 5 and 6.

First, the upper mold unit 200 presses toward the lower mold unit 300 and compresses the pipe 10 placed on the upper surface of the lower mold unit 300 from the upper direction to the lower direction, and at the same time, as shown in FIG. 5, The head portion 531 of the reduction unit 500 is provided in a shape in which an inner surface of the reduction block 5311 and an outer surface of the pipe 10 abut at one end of the pipe 10.

Next, as shown in FIG. 6, the reduction block 5311 and the support block 5312 can be advanced in the direction of the pipe 10 by the transfer unit 532 to reduce the diameter of the pipe 10 by a predetermined length.

As shown in Figure 5 and 6 as a step in the drawing, the upper mold unit 200 and the lower mold unit 300 form a compressed state, and at the same time, bending and reducing the diameter of the pipe 10 in one step. Work can be unified, which can shorten the process.

Hereinafter, the fixing unit 600 of another embodiment will be described with reference to FIGS. 7 and 8.

The fixing unit 600 is provided in a pair and is inserted into the fixing part insertion upper groove 223 located in the upper die part 220 and the fixing part insertion lower groove 323 located in the lower die part 320, respectively.

Fixing part insertion upper groove 223 is spaced a predetermined distance from the first groove 222 from the lower surface of the upper die portion 220, is recessed in the vertical direction to form a rectangular groove.

The fixing portion insertion lower groove 323 is provided in the same shape as the fixing portion insertion upper groove 223, and is provided at a position corresponding to the fixing portion insertion lower groove 323 on the upper surface of the lower die portion 320.

In addition, the fixing unit 600 is provided with a first fixing portion 610, a second fixing portion 620 and a rubber portion 630.

The first fixing portion 610 is formed to extend from the upper surface of the fixing portion insertion upper groove 223 recessed in a rectangular shape on the lower surface of the upper die portion 220, and is formed to extend vertically in the shape of a rectangular parallelepiped.

The second fixing part 620 is formed to extend from the lower surface of the first fixing part 610 and is formed to extend in the vertical direction in the shape of a rectangular parallelepiped having a length shorter than the first fixing part 610.

The rubber part 630 is coupled to the lower surface of the second fixing part 620 and has a predetermined thickness in a vertical shape in a rectangular parallelepiped shape. In addition, the material of the rubber portion 630 is preferably a material having the same elastic force as the known rubber material.

Therefore, when the upper mold unit 200 and the lower mold unit 300 form a compressed state, not only can the impact received by the pipe 10 be absorbed, but also an effect of increasing the fixing force of the pipe 10 occurs do.

That is, the upper mold unit 200 and the lower mold unit 300 fix the pipe 10 at the same time as pressing, and fix the outer surface of the pipe 10 once more through the rubber part 630 of the fixing unit 600. Because it does, there is an effect that the fixing force of the pipe 10 is increased.

In addition, the position where the rubber part 630 is in contact with the outer surface of the pipe 10 is reduced in diameter by only a predetermined distance from one side of the pipe 10, so that points having different diameters are preferable.

Therefore, the rubber portion 630 is fixed on the outer surface of the pipe 10, so that the diameter of the pipe 10 is enlarged by only a predetermined length, which occurs on the outer surface of the pipe 10, which may occur due to a step produced. There is an effect that can prevent the defect rate, such as wrinkles, warpage.

In the detailed description of the present invention described above, the present invention has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those skilled in the art will appreciate the invention described in the claims below. It will be understood that various modifications and changes may be made to the present invention without departing from the spirit and technical scope. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: pipe, 100: pressurization unit,
200: prize mold unit, 210: upper holder portion,
220: upper die portion, 221: upper groove,
222: first groove, 223: upper groove to insert the fixed portion,
300: lower mold unit, 310: lower holder,
320: lower die portion, 321: lower groove,
322: second groove, 323: the lower groove to insert the fixing portion,
400: bed unit, 410: base,
420: first leg, 430: second leg,
440: third leg, 450: fourth leg,
500: reduction unit, 510: first body portion,
520: second body portion, 530: drive portion,
531: head, 5311: reduced block,
5312: support block, 5313: lift,
5314: ball, 5315: first punch,
5316: second punch, 532: transfer part,
533: rib, 600: fixed unit,
610: first fixing portion, 620: second fixing portion,
630: rubber part.

Claims (7)

A pressing unit reciprocating in the vertical direction;
A upper mold unit coupled to the lower portion of the pressing unit;
A lower mold unit abutting in a shape corresponding to a lower portion of the upper mold unit;
A bed unit positioned under the lower mold unit to support the pressing unit, the upper mold unit, and the lower mold unit; And
Includes; a reduction unit located on one side of the upper mold unit and the lower mold unit;
When the upper mold unit presses the lower mold unit, the pipe placed on the lower mold unit is bent, and at the same time, the diameter of one side of the pipe is reduced by the reduction unit,
The prize mold unit,
Have a certain thickness in the vertical direction,
It has an upper groove recessed in a shape corresponding to the pipe,
The upper groove is characterized by having a curved shape,
The lower mold unit,
It is provided in a corresponding shape of the prize mold unit,
It has a lower groove recessed in a shape corresponding to the pipe,
The lower groove is characterized by having a curved shape,
The reduction unit,
A first body part coupled to an upper portion of the bed unit;
A second body portion coupled to the first body portion; And
It is characterized in that it is coupled to the upper portion of the second body portion, the driving portion for reducing the diameter of the pipe in a shape surrounding the outer surface only a predetermined length on one side of the pipe;
The driving unit,
A cylindrical head portion including a hollow portion; And
It is provided with; a transfer unit coupled to the rear of the head portion,
Characterized in that the transfer portion is moved forward and backward to move the head portion,
The head portion,
A shrinking block of a cylindrical shape including a hollow portion;
A support block coupled along an outer surface of the reduction block;
A cylindrical lift passing through the hollow portion of the reduction block;
A ball coupled to one side of the lift, and inserted into the inner side of the pipe at one side of the pipe;
A first punch coupled to the other side of the lift; And
It includes a hollow portion, a second punch coupled to one side of the reduction block and the support block; having,
On one side of the pipe, the inner surface of the pipe is supported against the ball,
When the reduction block is advanced along the outer surface of the pipe, characterized in that the diameter of the pipe is reduced,
The upper mold unit and the lower mold unit,
It is provided with a first groove and a second groove that is recessed and provided on one side,
When the head portion is moved forward from the transfer portion,
Characterized in that it is inserted into the first groove and the second groove,
The upper part of the upper die is recessed and provided with an upper groove for inserting a fixed part,
The lower part of the lower mold unit is provided with a recess for inserting a fixed portion provided recessed at one point of the upper surface,
The fixing part insertion upper groove and the fixing part insertion lower groove are separated only a predetermined distance from the first groove and the second groove,
Further comprising; a pair of fixing units that are respectively inserted into the fixing portion insertion upper groove and the fixing portion insertion lower groove;
The fixing unit includes a first fixing portion, a second fixing portion and a rubber portion,
The first fixing portion is formed to extend vertically in the shape of a rectangular parallelepiped in the upper groove of the fixing portion insertion,
The second fixing portion is formed to extend from the lower surface of the first fixing portion and is formed to extend vertically in a rectangular parallelepiped shape having a length shorter than the first fixing portion in the length and width directions.
The rubber portion is vertically formed in a rectangular parallelepiped shape on the lower surface of the second fixing portion,
When the upper mold unit presses the lower mold unit, the fixing unit fixes the pipe once more at a point of the pipe to prevent bending and warping caused by bending and shrinking of the pipe simultaneously. and,
The rubber portion has an elastic force to a predetermined thickness
Pipe bending device.
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