CN108620460B

CN108620460B - Pipe bending mechanism

Info

Publication number: CN108620460B
Application number: CN201810799485.3A
Authority: CN
Inventors: 王鹏鹏; 田凯; 尚玉廷; 张秀峰; 鲁鹏; 张天翼; 马徐武
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Priority date: 2018-07-19
Filing date: 2018-07-19
Publication date: 2020-08-11
Anticipated expiration: 2038-07-19
Also published as: CN108620460A

Abstract

The invention provides a pipe bending mechanism, which comprises: the pipe bending device is arranged on one side, away from a feeding mechanism of the pipe bending equipment, of a main body frame of the pipe bending equipment and used for bending a pipe; the cutting-off device is arranged on the main body frame and positioned between the feeding mechanism and the bending device so as to cut the pipe after the pipe is bent; the clamping device is arranged on the main body frame to fix the pipe when the pipe cutting device cuts the pipe. The pipe bending mechanism solves the problem that the defective rate of the bent pipe processed by the pipe bending equipment in the prior art is high.

Description

Pipe bending mechanism

Technical Field

The invention relates to the technical field of machining, in particular to a pipe bending mechanism.

Background

When a U-shaped pipe is processed by a pipe bending apparatus in the prior art, a pipe is generally cut into a predetermined length, and then the cut pipe is bent by a pipe bending mechanism.

However, the defective rate of the bent pipe processed by the method is high, and the problem that one leg of the U-shaped pipe is longer than the other leg of the U-shaped pipe often occurs, so that waste products are caused.

Disclosure of Invention

The invention mainly aims to provide a pipe bending mechanism to solve the problem that the defective rate of bent pipes processed by a pipe bending device in the prior art is high.

In order to achieve the above object, the present invention provides a pipe bending mechanism, including: the pipe bending device is arranged on one side, away from a feeding mechanism of the pipe bending equipment, of a main body frame of the pipe bending equipment and used for bending a pipe; the cutting-off device is arranged on the main body frame and positioned between the feeding mechanism and the bending device so as to cut the pipe after the pipe is bent; the clamping device is arranged on the main body frame to fix the pipe when the pipe cutting device cuts the pipe.

Further, the clamping device includes: the first clamping part is arranged on one side, close to the feeding mechanism, of the cutting device, so that the pipe, close to one side of the feeding mechanism, of the cutting device is fixed when the cutting device cuts the pipe.

Further, the first clamping portion includes: the clamping device comprises a fixed seat, a first clamping plate and a second clamping plate, wherein the first clamping plate is arranged on the fixed seat, and a plurality of first positioning grooves are formed in the first clamping plate; the second clamping plate is movably arranged relative to the first clamping plate, and one side of the second clamping plate, which is opposite to the first clamping plate, is provided with a plurality of second positioning grooves; wherein, a plurality of first constant head tank and a plurality of second constant head tank one-to-one set up, form the first constant head space that is used for pressing from both sides tight tubular product between first constant head tank and the second constant head tank to move through making the second splint to be close to first splint and press from both sides the tubular product tight in first constant head space, so that cut the tubular product of device to fixing a position.

Further, the first clamping part comprises a first driving device which is in driving connection with the second clamping plate so as to drive the second clamping plate to be close to or far away from the first clamping plate.

Further, the clamping device includes: and the second clamping part is arranged between the cutting device and the bending device so as to fix the pipe between the cutting device and the bending device when the cutting device cuts the pipe.

Further, the second clamping portion includes: the mounting seat is arranged on the main body frame; the third clamping plate is arranged on the mounting seat, and one side of the third clamping plate is provided with a plurality of third positioning grooves; the fourth clamping plate is movably arranged relative to the third clamping plate, and one side of the fourth clamping plate, which is opposite to the third clamping plate, is provided with a plurality of fourth positioning grooves; wherein, a plurality of third constant head tanks set up with a plurality of fourth constant head tanks one-to-one, form the second location space that is used for pressing from both sides tight tubular product between third constant head tank and the fourth constant head tank to move through making the fourth splint be close to the third splint and press from both sides the tubular product tightly in second location space, so that cut the device and cut the tubular product of location.

Further, the second clamping part comprises a second driving device which is in driving connection with the fourth clamping plate so as to drive the fourth clamping plate to be close to or far away from the third clamping plate.

Further, the pipe bending mechanism further comprises: the first lubricating device is arranged on the main body frame on one side, close to the feeding mechanism, of the clamping device, so that lubricating oil is sprayed on the outer wall of the pipe.

Further, the first lubricating device includes: the mounting body is movably arranged on a main body frame of the pipe bending equipment, a plurality of material guide holes are formed in the mounting body, and the material guide holes and the pipes are arranged in a one-to-one correspondence mode so that the pipes can penetrate through the corresponding material guide holes; the mounting body is also provided with a first oil guide hole which is communicated with the plurality of material guide holes; the oil conveying mechanism sprays oil into each material guide hole through the first oil guide hole so as to lubricate the pipe penetrating through the material guide holes.

Further, the pipe bending mechanism further comprises a second lubricating device, and the second lubricating device is arranged on the main body frame between the cutting device and the bending device so as to spray lubricating oil on the outer wall of the pipe.

Further, the bending device includes: the bending frame is rotatably arranged on the main body frame; the positioning plates are movably arranged on the bending frame and used for positioning a plurality of parts of the pipe; the positioning plate comprises a plurality of clamping portions, the clamping portions and the pipes are arranged in a one-to-one correspondence mode to fix the pipes, and the bending frame drives the pipes to be bent when the bending frame turns towards the cutting device.

Furthermore, the bending device further comprises a turnover driving device, and the turnover driving device is in driving connection with the bending frame to drive the bending frame to rotate so as to bend the pipe.

The pipe bending mechanism comprises the bending device, the clamping device and the cutting device, when the pipe is machined, the bending device reversely bends one end of the pipe, the clamping device is used for clamping and fixing the pipe, then the cutting device cuts the pipe according to the length of the bent pipe, the mode of bending and cutting ensures that the U-shaped pipe is free from the problem that one end is long and the other end is short, and the machining qualified rate is higher.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic view of an embodiment of a pipe bending mechanism according to the invention;

FIG. 2 is a schematic diagram illustrating an embodiment of a bending device of a tube bending mechanism according to the present invention;

FIG. 3 shows a schematic view of an embodiment of a first clamping portion of a pipe bending mechanism according to the invention;

FIG. 4 illustrates a partial schematic structural view of a first clamping portion of a pipe bending mechanism according to the present invention;

FIG. 5 shows a schematic view of an embodiment of a second clamping portion of the elbow mechanism according to the invention;

FIG. 6 illustrates a front view of an embodiment of a second clamping portion of the elbow mechanism according to the present invention;

fig. 7 shows a schematic view of the lubrication mechanism and the first clamping part of the pipe bending mechanism according to the invention.

Wherein the figures include the following reference numerals:

10. a bending device; 11. a bending frame; 12. positioning a plate; 20. a cut-off device; 30. a first clamping portion; 31. a fixed seat; 32. a first splint; 33. a second splint; 40. a second clamping portion; 41. a mounting seat; 42. a third splint; 43. a fourth splint; 44. a second driving device; 50. a first lubricating device; 51. an installation body; 511. a material guide hole; 512. a first oil guide hole; 60. a second lubricating device; 61. a material guide pipe; 62. a second oil guide hole; 63. an oil receiving pan.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The present invention provides a pipe bending mechanism, please refer to fig. 1 to 7, the pipe bending mechanism includes: the pipe bending device comprises a bending device 10, a clamping device and a cutting device 20, wherein the bending device 10 is arranged on one side, away from a feeding mechanism of the pipe bending device, of a main body frame of the pipe bending device so as to bend a pipe; the cutting-off device 20 is arranged on the main body frame and positioned between the feeding mechanism and the bending device so as to cut the pipe after the pipe is bent; the clamping device is provided on the main body frame to fix the pipe when the cutoff device 20 cuts the pipe.

The pipe bending mechanism comprises a bending device 10, a clamping device and a cutting device 20, when a pipe is machined, the bending device 10 bends one end of the pipe reversely, the clamping device is used for clamping and fixing the pipe, then the cutting device 20 cuts the pipe according to the length of the bent pipe, the mode that the pipe is bent and cut first ensures that the U-shaped pipe is free from the problem that one end is long and the other end is short, and the machining qualified rate is higher.

The clamping device includes: and a first clamping part 30, wherein the first clamping part 30 is arranged on one side of the cutting device 20 close to the feeding mechanism so as to fix the pipe on one side of the cutting device 20 close to the feeding mechanism when the cutting device 20 cuts the pipe.

As shown in fig. 1, the clamping device in this embodiment includes a first clamping portion 30, and the first clamping portion 30 is disposed on a side of the truncating device 20 away from the bending device 10 to fix the pipe during the cutting process of the pipe by the truncating device 20 and prevent the pipe from moving during the cutting process.

The first clamping portion 30 includes: the clamping device comprises a fixed seat 31, a first clamping plate 32 and a second clamping plate 33, wherein the first clamping plate 32 is arranged on the fixed seat 31, and a plurality of first positioning grooves are formed in the first clamping plate 32; the second clamping plate 33 is movably arranged relative to the first clamping plate 32, and one side of the second clamping plate 33, which is opposite to the first clamping plate 32, is provided with a plurality of second positioning grooves; wherein, a plurality of first constant head tank and a plurality of second constant head tank one-to-one set up, form the first positioning space that is used for pressing from both sides tight tubular product between first constant head tank and the second constant head tank to move through making second splint 33 be close to first splint 32 and press from both sides the tubular product tight in first positioning space, so that cut the tubular product of device to fixing a position.

As shown in fig. 3 and 4, the first clamping portion 30 in this embodiment specifically includes a fixing seat 31, a first clamping plate 32 and a second clamping plate 33, the second clamping plate 33 is movably disposed relative to the first clamping plate 32, in order to better fix a plurality of pipes, a plurality of first positioning grooves are disposed on the first clamping plate 32, a plurality of second positioning grooves corresponding to the first positioning grooves are disposed on the second clamping plate, and a first positioning space for clamping the pipes is formed between the first positioning grooves and the second positioning grooves, so as to fix the pipes.

The first clamping portion 30 includes a first driving device drivingly connected to the second clamping plate 33 to drive the second clamping plate 33 toward or away from the first clamping plate 32.

The first clamping portion 30 in this embodiment further comprises a first driving device, which is drivingly connected to the second clamping plate 33 to control the movement of the second clamping plate 33.

The clamping device includes: and a second clamping portion 40, the second clamping portion 40 being provided between the cutting device 20 and the bending device 10 to fix the pipe between the cutting device 20 and the bending device 10 when the cutting device 20 cuts the pipe.

As shown in fig. 5 and 6, the clamping device in this embodiment is further provided with a second clamping portion 40 to fix the pipe on the other side of the cutting device 20, so as to ensure that the pipe does not move when the cutting device 20 cuts the pipe.

The second clamping portion 40 includes a mounting seat 41, a third clamping plate 42 and a fourth clamping plate 43, the mounting seat 41 is disposed on the body frame; the third clamping plate 42 is arranged on the mounting seat 41, and one side of the third clamping plate 42 is provided with a plurality of third positioning grooves; the fourth clamping plate 43 is movably arranged relative to the third clamping plate 42, and one side of the fourth clamping plate 43, which is opposite to the third clamping plate 42, is provided with a plurality of fourth positioning grooves; wherein, a plurality of third constant head tanks set up with a plurality of fourth constant head tanks one-to-one, form the second location space that is used for pressing from both sides tight tubular product between third constant head tank and the fourth constant head tank to move through making fourth splint 43 be close to third splint 42 and press from both sides the tubular product tightly in second location space, so that cut device 20 cuts the tubular product of fixing a position.

As shown in fig. 5 and 6, the second clamping portion 40 includes a mounting seat 41, a third clamping plate 42 and a fourth clamping plate 43, the mounting seat 41 is fixed on the body frame, the third clamping plate 42 is fixed on the mounting seat 41, the fourth clamping plate 43 is located below the third clamping plate 42 and can move relative to the third clamping plate 42 to be close to or away from the third clamping plate 42, in order to fix a plurality of pipes, a plurality of third positioning grooves are formed on the lower side of the third clamping plate 42, a plurality of fourth positioning grooves are formed on the upper side of the fourth clamping plate 43, the plurality of third positioning grooves and the plurality of fourth positioning grooves are arranged in a one-to-one correspondence manner, a second positioning space for clamping the pipes is formed between the third positioning grooves and the fourth positioning grooves, so that the pipes are clamped in the second positioning space by moving the fourth clamping plate 43 close to the third clamping plate 42, so that the positioned pipes are intercepted by the intercepting device 20.

The second clamping portion 40 includes a second driving device 44, and the second driving device 44 is drivingly connected to the fourth clamping plate 43 to drive the fourth clamping plate 43 toward or away from the third clamping plate 42.

As shown in fig. 6, the second clamping portion 40 in the present embodiment includes a second driving device 44, and the second driving device 44 drives the fourth clamping plate 43 to move relative to the third clamping plate 42.

The pipe bending mechanism further comprises: and the first lubricating device 50 is arranged on the main body frame on one side, close to the feeding mechanism, of the clamping device, so that lubricating oil is sprayed on the outer wall of the pipe.

As shown in fig. 7, the pipe bending mechanism in this embodiment is further provided with a first lubricating device 50, and the first lubricating device is used for spraying oil to lubricate the pipe on the pipe bending mechanism.

The first lubricating device includes: the mounting body 51 is movably arranged on the main body frame of the pipe bending equipment, the mounting body 51 is provided with a plurality of material guide holes 511, and the material guide holes 511 and the pipe materials are arranged in a one-to-one correspondence manner so that the pipe materials can pass through the corresponding material guide holes 511; the mounting body 51 is further provided with a first oil guide hole 512, and the first oil guide hole 512 is communicated with the plurality of material guide holes 511; the oil delivery mechanism delivers oil into each guide hole 511 through the first oil guide hole 512, so as to lubricate the pipe passing through the guide hole 511.

As shown in fig. 7, the lubricating device in this embodiment specifically includes an installation body 51, in order to facilitate oil injection on the pipe, a plurality of material guiding holes 511 are provided on the installation body 51, the pipe is inserted into the material guiding holes 511, a first oil guiding hole 512 is further provided on the installation body 51 in this embodiment, and the first oil guiding hole 512 is communicated with the plurality of material guiding holes 511; the oil delivery mechanism sprays oil into each guide hole 511 through the first oil guide hole 512 to lubricate the pipe passing through the guide hole 511.

The pipe bending mechanism further comprises: and the second lubricating device 60 is arranged on the main body frame between the cutting device 20 and the bending device 10, so that lubricating oil is sprayed on the outer wall of the pipe.

As shown in fig. 5 and 6, the second lubricating device 60 and the second clamping portion 40 in this embodiment are disposed on the same mounting base 41, the second lubricating device 60 is provided with a plurality of material guiding pipes 61 and a second oil guiding hole 62, the second oil guiding hole is communicated with the plurality of material guiding pipes, the oil atomizer is communicated with the second oil guiding hole and sprays oil into the second oil guiding hole, and sprays oil into the pipe passing through the material guiding pipes through the second oil guiding hole to lubricate the pipe, the second lubricating device 60 further includes an oil receiving pan 63, and the oil receiving pan 63 is disposed below the plurality of material guiding pipes 61 to collect the lubricating oil flowing out from the material guiding pipes 61 and the second oil guiding holes.

The bending apparatus 10 includes: the bending frame 11 is rotatably arranged on the main body frame; a plurality of positioning plates 12 are movably arranged on the bending frame 11 for positioning a plurality of parts of the pipe; wherein, locating plate 12 includes a plurality of clamping parts, and a plurality of clamping parts set up with a plurality of tubular product one-to-one to fix a plurality of tubular products, in order when bending frame 11 overturns towards cutting device 20, make bending frame 11 drive tubular product and bend.

As shown in fig. 1 and 2, the bending device in this embodiment includes a bending frame 11 and a plurality of positioning plates 12, the positioning plates are disposed on the bending frame 11 at intervals to fix the pipe on the bending frame, and the bending frame 11 drives the pipe to turn toward the cut-off device 20 to bend the pipe.

The bending device further comprises a turnover driving device, and the turnover driving device is in driving connection with the bending frame 11 to drive the bending frame 11 to rotate so as to bend the pipe.

The bending device in this embodiment further includes a turning driving device, and the turning driving device drives the bending frame 11 to rotate so as to fold the tube into a U-shaped tube.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tube bending mechanism, comprising:

the bending device (10) is arranged on one side, away from the feeding mechanism of the pipe bending mechanism, of the main body frame of the pipe bending mechanism, and is used for bending the pipe;

the cutting device (20) is arranged on the main body frame and positioned between the feeding mechanism and the bending device (10) so as to cut the pipe after the pipe is bent;

a clamping device provided on the body frame to fix the pipe when the cutoff device (20) cuts the pipe;

the clamping device includes: a first clamping portion (30), wherein the first clamping portion (30) is arranged on one side, close to the feeding mechanism, of the cutting device (20) so as to fix the pipe, close to the feeding mechanism, of the cutting device (20) when the cutting device (20) cuts the pipe; a second clamping portion (40), the second clamping portion (40) being disposed between the severing device (20) and the bending device (10) to fix the tube between the severing device (20) and the bending device (10) when the severing device (20) cuts the tube;

the first lubricating device (50) is arranged on the main body frame on one side, close to the feeding mechanism, of the clamping device, so that lubricating oil is sprayed on the outer wall of the pipe;

the first lubricating device (50) comprises: the mounting body (51) is movably arranged on the main body frame of the pipe bending mechanism, a plurality of material guide holes (511) are formed in the mounting body (51), the material guide holes (511) and the pipes are arranged in a one-to-one correspondence mode, and therefore the pipes can penetrate through the corresponding material guide holes (511); the mounting body (51) is also provided with a first oil guide hole (512), and the first oil guide hole (512) is communicated with the plurality of material guide holes (511); the oil conveying mechanism sprays oil into each guide hole (511) through the first oil guide hole (512) so as to lubricate a pipe passing through the guide hole (511);

the second lubricating device (60) is arranged on the main body frame between the cutting device (20) and the bending device (10) so as to spray lubricating oil on the outer wall of the pipe;

the second lubricating device (60) is provided with a plurality of material guide pipes (61) and a second oil guide hole (62), the second oil guide hole (62) is communicated with the material guide pipes (61), the oil atomizer is communicated with the second oil guide hole (62) and injects oil into the second oil guide hole (62), and injects oil to the pipe penetrating through the material guide pipes (61) through the second oil guide hole (62) so as to lubricate the pipe; the second lubricating device (60) further comprises an oil receiving disc (63), wherein the oil receiving disc (63) is arranged below the guide pipes (61) and is used for collecting lubricating oil flowing out of the guide pipes (61) and the second oil guide holes (62).

2. The elbow mechanism according to claim 1, characterized in that the first clamping portion (30) comprises:

a fixed seat (31);

the first clamping plate (32) is arranged on the fixed seat (31), and a plurality of first positioning grooves are formed in the first clamping plate (32);

the second clamping plate (33), the second clamping plate (33) is movably arranged relative to the first clamping plate (32), and one side of the second clamping plate (33) opposite to the first clamping plate (32) is provided with a plurality of second positioning grooves;

the first positioning grooves and the second positioning grooves are arranged in a one-to-one correspondence mode, a first positioning space used for clamping a pipe is formed between the first positioning grooves and the second positioning grooves, so that the pipe is clamped in the first positioning space by enabling the second clamping plate (33) to move close to the first clamping plate (32), and the pipe is cut by the cutting device.

3. The pipe bending mechanism according to claim 2, wherein the first clamping portion (30) comprises a first driving means drivingly connected to the second jaw (33) for driving the second jaw (33) towards or away from the first jaw (32).

4. The elbow mechanism according to claim 1, characterized in that the second clamping portion (40) comprises:

a mounting seat (41), wherein the mounting seat (41) is arranged on the main body frame;

the third clamping plate (42) is arranged on the mounting seat (41), and one side of the third clamping plate (42) is provided with a plurality of third positioning grooves;

the fourth clamping plate (43) is movably arranged relative to the third clamping plate (42), and one side, opposite to the third clamping plate (42), of the fourth clamping plate (43) is provided with a plurality of fourth positioning grooves;

the third positioning grooves and the fourth positioning grooves are arranged in a one-to-one correspondence mode, a second positioning space used for clamping a pipe is formed between the third positioning grooves and the fourth positioning grooves, so that the pipe is clamped in the second positioning space through the fact that the fourth clamping plate (43) moves close to the third clamping plate (42), and the pipe is cut by the cutting device (20).

5. The pipe bending mechanism according to claim 4, wherein the second clamping portion (40) comprises a second driving device (44), the second driving device (44) being in driving connection with the fourth jaw (43) to drive the fourth jaw (43) towards or away from the third jaw (42).

6. The pipe bending mechanism according to claim 1, wherein the bending device (10) comprises:

the bending frame (11), the bending frame (11) is rotatably arranged on the main body frame;

a plurality of positioning plates (12), wherein the positioning plates (12) are movably arranged on the bending frame (11) and used for positioning a plurality of parts of the pipe;

the positioning plate (12) comprises a plurality of clamping parts, the clamping parts and the pipes are arranged in a one-to-one correspondence mode to fix the pipes, and the bending frame (11) drives the pipes to be bent when the bending frame (11) faces the cut-off device (20) to turn over.

7. The pipe bending mechanism according to claim 6, wherein the bending device further comprises a turning driving device, and the turning driving device is in driving connection with the bending frame (11) to drive the bending frame (11) to rotate so as to bend the pipe.