CN222607642U - A double-layer film automatic pipe bending machine - Google Patents

Abstract

The utility model relates to an automatic double-layer film pipe bending machine, which is characterized in that a machine head mounting frame is arranged on a machine frame in a sliding manner along a Y-Z axis, a driving gear is fixedly connected to a power output shaft of a first driving motor, a rotating shaft is rotatably connected to the machine head mounting frame, a driven gear meshed with the driving gear is coaxially and fixedly connected to the rotating shaft, a first pipe bending assembly is fixedly connected to the rotating shaft, a second pipe bending assembly is arranged on the machine head mounting frame, and at least two first pipe clamping blocks for positioning and supporting a pipe are arranged on an action output part of the first pipe bending assembly. According to the utility model, two or more sets of clamping dies and clamps of pipe bending mechanisms with different types are arranged on one machine head, and the clamping dies and clamps of the pipe bending mechanisms are adjusted to be aligned and matched with the steel pipe, so that the requirement of multi-bending-radius processing of the steel pipe is met in one processing process, the product processing diversity is improved, and the production efficiency and the processing precision are improved by arranging the pipe bending mechanisms and the pipe feeding mechanisms.

Description

Automatic double-layer film pipe bending machine

Technical Field

The application belongs to the technical field of pipe bending machines, and particularly relates to an automatic double-layer film pipe bending machine.

Background

In the traditional pipe processing industry, pipe bending is a basic and important process. This process requires precise bending depending on the specifications, materials, and bending angles and radii required for the tubing. Conventional pipe bending machines are mainly of the manual and automatic types. The operation of the manual pipe bender mainly depends on the skill and experience of operators to control the bending angle and shape of the pipe, which is not only inefficient, but also difficult to ensure the bending precision and repeatability. The existing automatic pipe bending machine improves the defect of manual operation to a certain extent, and realizes the partially automatic pipe bending process through mechanical or electronic control, but has the problem that the bending precision is difficult to meet the high standard requirement, and in the single machine processing process of the existing automatic pipe bending machine, only one set of die can be used, the bending radius of the processed product is single, and the requirement of one-time clamping for realizing multi-bending radius processing cannot be met.

Disclosure of utility model

The utility model aims to solve the technical problems in the prior art, so as to provide the double-layer film automatic pipe bending machine, at least one of the following technical effects is realized, the production efficiency and the processing precision are improved, and the requirement of multi-bending radius processing is met by clamping for the second time.

The technical scheme adopted for solving the technical problems is as follows:

An automatic double-layer film pipe bending machine comprises a frame;

One end of the frame is provided with a pipe bending mechanism, the pipe bending mechanism comprises a machine head mounting frame, the machine head mounting frame is arranged on the frame in a sliding manner along a Y-Z axis, a first driving motor is arranged on the machine head mounting frame, and a driving gear is fixedly connected to a power output shaft of the first driving motor;

The machine head mounting frame is rotatably connected with a rotating shaft, and a driven gear meshed with the driving gear is coaxially and fixedly connected with the rotating shaft;

The rotating shaft is also fixedly connected with a first pipe bending assembly, the machine head mounting frame is provided with a second pipe bending assembly, and the action output part of the first pipe bending assembly is at least provided with two first pipe clamping blocks for positioning and supporting a pipe;

The action output part of the second elbow assembly is provided with at least two third pipeline clamping blocks for positioning and supporting the pipeline;

The rotary shaft is also coaxially and fixedly connected with at least two bent pipe guide molds, the bent pipe guide molds are provided with annular grooves, the bent pipe guide molds are provided with fifth pipeline clamping blocks parallel to the first pipeline clamping blocks, and arc-shaped positioning grooves of the fifth pipeline clamping blocks are tangent to the annular grooves of the bent pipe guide molds connected with the fifth pipeline clamping blocks.

Preferably, the first pipe bending assembly further comprises a first tool frame, a first die frame and a first connecting rod assembly, wherein the first pipe clamping block is fixedly connected to the first die frame, and the first connecting rod assembly is used for driving the first pipe clamping block to act, so that the first pipe clamping block is close to the pipe bending guide die to clamp a pipe or far away from the pipe bending guide die.

Preferably, the automatic double-layer film pipe bending machine comprises a first triangular connecting rod, a first connecting rod, a second connecting rod and a third connecting rod, wherein one end of the first triangular connecting rod and the third connecting rod are hinged on the inner wall of a first tool frame, the other end of the third connecting rod is hinged on a first die frame, the other end of the first triangular connecting rod is hinged with the first connecting rod, the other end of the first connecting rod is coaxially hinged with the first die frame and the second connecting rod, and the other end of the second connecting rod is hinged on the inner wall of the first tool frame.

Preferably, the automatic double-layer film pipe bending machine is characterized in that a first driving cylinder is hinged to the first tool frame, and the end part of a telescopic rod of the first driving cylinder is hinged to a first triangular connecting rod.

Preferably, the second pipe bending assembly comprises a second tool frame, a second die frame and a second connecting rod assembly, wherein the second die frame is fixedly connected to the second tool frame, two or more third pipeline clamping blocks are respectively connected to the second die frame in a sliding mode along the X-axis direction, the second connecting rod assembly comprises a fourth connecting rod and a fifth connecting rod, one end of the fourth connecting rod is hinged to the inner wall of the second tool frame, the other end of the fourth connecting rod is hinged to the fifth connecting rod, and the other end of the fifth connecting rod is hinged to the bottom of the second die frame.

Preferably, the automatic double-layer film pipe bending machine is characterized in that a second driving cylinder is hinged to the second tool frame, and the end part of a telescopic rod of the second driving cylinder is hinged to a fourth connecting rod.

Preferably, the automatic double-layer film pipe bending machine further comprises a pipe feeding mechanism, wherein a guide rail sliding block mechanism and a rack are arranged on the rack in a sliding mode along the X-axis direction, the pipe feeding mechanism comprises a sliding plate connected to the guide rail sliding block mechanism, a hollow main shaft for rotationally driving and inserting pipes is arranged on the sliding plate in the Y-axis direction in a sliding mode, an elastic multi-clamping jaw structure is arranged at the front end portion of the hollow main shaft, an outer wall surface of the multi-clamping jaw structure is an inclined surface inclined upwards outwards, a sleeve is movably sleeved on the hollow main shaft, and the sleeve is used for extruding the inclined surface of the outer wall of the multi-clamping jaw structure when sliding along the end portion of the hollow main shaft, so that the multi-clamping jaw structure clamps the pipes in the hollow main shaft.

Preferably, the box body of the hollow main shaft is hinged with a third driving cylinder, the end part of a telescopic shaft of the third driving cylinder is hinged with the sleeve, and the third driving cylinder is used for driving the inner wall of the front end of the sleeve to extrude or keep away from the multi-clamping jaw structure of the end part of the hollow main shaft.

Preferably, the double-layer film automatic pipe bending machine is characterized in that a second driving motor is further arranged on the sliding plate, a gear is fixedly connected to a power output shaft of the second driving motor, and the gear is meshed with the rack and used for driving the sliding plate to slide along a guide rail of the guide rail sliding block mechanism to feed pipes.

The beneficial effects of the utility model are as follows:

(1) According to the utility model, two or more sets of clamping dies and clamps of pipe bending mechanisms with different types are arranged on one machine head, and the clamping dies and clamps of the pipe bending mechanisms are adjusted to be aligned and matched with the steel pipe, so that the requirement of multi-bending radius processing of the steel pipe is met in one processing process, and the processing diversity of products is improved;

(2) Compared with the traditional sprocket transmission mode, the gear transmission structure provided by the utility model can improve transmission precision, so that the processing precision of the bent pipe is improved;

(3) The gear transmission structure is arranged in the machine head mounting frame, so that the processing safety is improved, the height of the gear transmission structure is low, the height of a bent pipe processing station can be reduced, and the pipe material is convenient to feed and discharge;

(4) By arranging the pipe bending mechanism and the pipe feeding mechanism, automatic pipe feeding and pipe bending operation are realized, and the production efficiency and the processing precision are improved.

Drawings

The technical scheme of the application is further described below with reference to the accompanying drawings and examples.

FIG. 1 is a schematic overall structure of an embodiment of the present application;

FIG. 2 is a schematic view of a pipe bending mechanism according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of a drive mechanism of a pipe bending mechanism according to an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of a first elbow assembly according to an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of a second elbow assembly according to an embodiment of the present application;

FIG. 6 is a schematic view of a pipe feeding mechanism according to an embodiment of the present application;

FIG. 7 is a schematic cross-sectional view of a hollow spindle in accordance with an embodiment of the present application;

The reference numerals in the figures are:

A frame 10, a pipe bending mechanism 20, a pipe feeding mechanism 30,

The device comprises a guide rail sliding block mechanism 11, a rack 12, a machine head mounting frame 21, a first driving motor 22, a driving gear 23, a rotating shaft 24, a driven gear 25, a first elbow pipe assembly 26, a second elbow pipe assembly 27, an elbow pipe guide die 28, a screw rod driving device 29, a sliding plate 31, a hollow main shaft 32, a sleeve 33, a third driving cylinder 34, a second driving motor 35, a fourth driving motor 36 and a main shaft mounting seat 37;

A first pipe clamp 261, a first tool frame 262, a first die frame 263, a first link assembly 264, a second pipe clamp 265, a third pipe clamp 271, a second tool frame 272, a second die frame 273, a second link assembly 274, a fourth drive cylinder 275, a fourth pipe clamp 276, a fifth pipe clamp 281;

The first triangle link 2641, the first link 2642, the second link 2643, the third link 2644, the first driving cylinder 2645, the fourth link 2741, the fifth link 2742, and the second driving cylinder 2743.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art in a specific case.

The technical scheme of the present application will be described in detail below with reference to the accompanying drawings in combination with embodiments.

Examples

The embodiment provides a double-layer film automatic pipe bending machine, the structure of which is shown in fig. 1, and the double-layer film automatic pipe bending machine comprises a frame 10, a pipe bending mechanism 20 and a pipe feeding mechanism 30.

One end of the frame 10 is provided with a pipe bending mechanism 20, and referring to fig. 2 and 3, the pipe bending mechanism 20 comprises a machine head mounting frame 21, the machine head mounting frame 21 and the frame 10 slide on a Y-Z plane by arranging guide rail sliding blocks in Y-axis and Z-axis directions, and a screw rod driving device 29 in Y-axis and Z-axis directions is arranged to drive the machine head mounting frame 21 to slide on the Y-Z plane.

The machine head mounting frame 21 is provided with a first driving motor 22, a power output shaft of the first driving motor 22 is connected with a driving gear 23 through a speed reducer, a rotating shaft 24 is rotatably connected to the machine head mounting frame 21, and a driven gear 25 meshed with the driving gear 23 is coaxially and fixedly connected to the rotating shaft 24.

The rotating shaft 24 is fixedly connected with a first pipe bending assembly 26 and two pipe bending guide dies 28, the first pipe bending assembly 26 comprises a first pipe clamping block 261, a first tool frame 262, a first die frame 263, a first connecting rod assembly 264 and a second pipe clamping block 265, the first pipe clamping block 261 and the second pipe clamping block 265 are fixedly connected on the first die frame 263 in parallel, arc-shaped clamping grooves are formed in the first pipe clamping block 261 and the second pipe clamping block 265 and used for positioning and clamping steel pipes, the first connecting rod assembly 264 is used for driving the first die frame 263 to act, and the first pipe clamping block 261 and the second pipe clamping block 265 are close to the pipe bending guide dies 28 to clamp pipes or far away from the pipe bending guide dies 28.

Preferably, referring to fig. 4, the first link assembly 264 of the automatic dual-film bender of the present embodiment includes a first triangle link 2641, a first link 2642, a second link 2643 and a third link 2644, one end of the first triangle link 2641 is hinged to the inner wall of the first tool frame 262 with the third link 2644, the other end of the third link 2644 is hinged to the first die frame 263, the other end of the first triangle link 2641 is hinged to the first link 2642, the other end of the first link 2642 is coaxially hinged to the first die frame 263 and the second link 2643, and the other end of the second link 2643 is hinged to the inner wall of the first tool frame 262.

Preferably, in the automatic double-film pipe bending machine of the present embodiment, the first tool frame 262 is further hinged with a first driving cylinder 2645, and the end of a telescopic rod of the first driving cylinder 2645 is hinged with a first triangle connecting rod 2641.

Preferably, in the automatic double-film pipe bender of this embodiment, the pipe bending guide mold 28 is in a roller shape, ring grooves for clamping pipes are formed along the circumference of the outer wall of the pipe bending guide mold 28, a first ring groove and a second ring groove are respectively formed in the two pipe bending guide molds 28, a notch is respectively formed in each pipe bending guide mold 28, a fifth pipe clamping block 281 is fixedly connected to each notch, the fifth pipe clamping block 281 is parallel to the first pipe clamping block 261, and an arc-shaped positioning groove formed in the fifth pipe clamping block 281 is tangentially connected with the first ring groove or the second ring groove connected with the fifth pipe clamping block, and the first pipe clamping block 261, the second pipe clamping block 265 and the fifth pipe clamping block 281 are used for clamping the pipes when the pipe is clamped.

Preferably, in the automatic double-film pipe bender of the present embodiment, the second pipe bending assembly 27 is fixedly connected to the machine head mounting frame 21, and in this embodiment, the third pipe clamping block 271 and the fourth pipe clamping block 276 for positioning and supporting a pipe are slidably disposed on the motion output portion of the second pipe bending assembly 27 along the X-axis direction.

Preferably, referring to fig. 5, the second pipe bending assembly 27 includes a second tool frame 272, a second die frame 273 and a second link assembly 274, the second die frame 273 is fixedly connected to the second tool frame 272, the third pipe clamping block 271 and the fourth pipe clamping block 276 are slidably mounted on the second die frame 273 along the X-axis direction, a fourth driving cylinder 275 for driving the third pipe clamping block 271 and the fourth pipe clamping block 276 to slide on the second die frame 273 along the X-axis direction is provided between the third pipe clamping block 271 and the fourth pipe clamping block 276 and the second die frame 273, the second link assembly 274 includes a fourth link 2741 and a fifth link 2742, one end of the fourth link 2741 is hinged on the inner wall of the second tool frame 272, the other end is hinged with the fifth link 2742, and the other end of the fifth link 2742 is hinged with the bottom of the second die frame 273.

Preferably, in the automatic double-film pipe bending machine of the embodiment, the second tool rack 272 is further hinged with a second driving cylinder 2743, and the end part of a telescopic rod of the second driving cylinder 2743 is hinged with a fourth connecting rod 2741.

It should be noted that the arc-shaped positioning groove on the third pipe clamping block 271 is at the same height as the annular groove on the pipe bending guide mold 28, and the arc-shaped positioning groove on the first pipe clamping block 261 is at the same height as the annular groove on the pipe bending guide mold 28 and aligned with the arc-shaped positioning groove of the fifth pipe clamping block 281 under the pushing of the first driving cylinder 2645 to clamp the pipe.

Preferably, referring to fig. 1, 6 and 7, the automatic double-film pipe bender further comprises a pipe feeding mechanism 30, a guide rail sliding block mechanism 11 and a rack 12 are slidably arranged on a rack 10 along the X-axis direction, the pipe feeding mechanism 30 comprises a sliding plate 31 connected to the sliding block of the guide rail sliding block mechanism 11, a main shaft mounting seat 37 is slidably arranged on the sliding plate 31 along the Y-axis direction through the guide rail sliding block, a hollow main shaft 32 is rotatably arranged in the main shaft mounting seat 37, the hollow main shaft 32 is used for rotationally driving and inserting pipe materials, the front end part of the hollow main shaft 32 is connected with an elastically deformed multi-jaw structure, the thickness of the multi-jaw structure close to the end part direction is gradually thickened, an upward inclined surface is formed on the outer wall of the multi-jaw structure, a sleeve 33 is movably sleeved on the hollow main shaft 32, and the sleeve 33 is used for extruding the multi-jaw structure when sliding along the end part of the hollow main shaft 32, so that the multi-jaw structure clamps the pipe materials in the hollow main shaft 32.

A fourth driving motor 36 is further arranged above the hollow main shaft 32, and a synchronous belt speed reduction transmission mechanism is arranged between a power output shaft of the fourth driving motor 36 and the hollow main shaft 32, so that the fourth driving motor 36 drives the hollow main shaft 32 to rotate, and the bending direction of the pipe is adjusted.

Preferably, in the automatic double-film pipe bending machine of the embodiment, a third driving air cylinder 34 is hinged on the box body of the hollow main shaft 32, the end part of a telescopic shaft of the third driving air cylinder 34 is hinged with the sleeve 33, and the third driving air cylinder 34 is used for driving the inner wall of the front end of the sleeve 33 to extrude or keep away from the multi-clamping jaw structure of the end part of the hollow main shaft 32.

Preferably, in the automatic double-layer film pipe bending machine of the embodiment, the sliding plate 31 is further provided with a second driving motor 35, a gear is fixedly connected to a power output shaft of the second driving motor 35, and the gear is meshed with the rack 12 and is used for driving the sliding plate 31 to slide along a guide rail of the guide rail sliding block mechanism to feed pipes.

In actual operation, the pipe to be bent is inserted into the hollow main shaft 32 by a mechanical arm or manually, in this embodiment, the pipe is a steel pipe, the inner wall of the front end of the sleeve 33 is driven by the third driving cylinder 34 to extrude the multi-jaw structure, so that the steel pipe is clamped, the second driving motor 35 rotates, and the driving slide plate 31 moves away from the pipe bending mechanism 20 to the bending initial position;

The screw rod driving device 29 drives the machine head mounting frame 21 to ascend, so that the arc-shaped positioning groove of the fourth pipeline clamping block 276 is aligned with the steel pipe, the second driving cylinder 2743 and the first driving cylinder 2645 extend to move, and the fourth pipeline clamping block 276 and the second pipeline clamping block 265 are respectively pushed to move close to the elbow guide die 28, so that the pipeline is abutted in the second annular groove of the elbow guide die 28;

The first driving motor 22 rotates, the driving gear 23 and the driven gear 25 drive the rotating shaft 24 to rotate, so that the first pipe bending assembly 26 and the pipe bending guide die 28 are driven to synchronously rotate, pipe bending action of the steel pipe is realized, and the bending angle of the steel pipe is adjusted by adjusting the rotation amount of the first driving motor 22;

Subsequently, the fourth pipe clamp block 276 and the second pipe clamp block 265 return to the original positions, the second driving motor 35 rotates to drive the sliding plate 31 to move close to the pipe bending mechanism 20 until reaching the required length of the pipe bending section, the fourth driving motor 36 drives the hollow main shaft 32 to rotate, the bending direction of the steel pipe is adjusted, the screw rod driving device 29 drives the machine head mounting frame 21 to move downwards, so that the arc-shaped positioning groove of the third pipe clamp block 271 is aligned with the steel pipe, the second driving cylinder 2743 and the first driving cylinder 2645 extend to respectively push the third pipe clamp block 271 and the first pipe clamp block 261 to move close to the pipe bending guide die 28, and the pipe is abutted in the first annular groove of the pipe bending guide die 28;

repeating the clamping and bending actions until the bending actions are completed.

With the above-described preferred embodiments according to the present application as a teaching, the worker skilled in the art could make various changes and modifications without departing from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of claims.

Claims (9)

1. An automatic double-layer film pipe bending machine is characterized by comprising a frame (10);

One end of the frame (10) is provided with a pipe bending mechanism (20), the pipe bending mechanism (20) comprises a machine head mounting frame (21), the machine head mounting frame (21) is arranged on the frame (10) in a sliding mode along a Y-Z axis, a first driving motor (22) is arranged on the machine head mounting frame (21), and a driving gear (23) is fixedly connected to a power output shaft of the first driving motor (22);

A rotating shaft (24) is rotatably connected to the machine head mounting frame (21), and a driven gear (25) meshed with the driving gear (23) is coaxially and fixedly connected to the rotating shaft (24);

The rotating shaft (24) is fixedly connected with a first pipe bending assembly (26), the machine head mounting frame (21) is provided with a second pipe bending assembly (27), and the action output part of the first pipe bending assembly (26) is provided with at least two first pipe clamping blocks (261) for positioning and supporting a pipe;

The action output part of the second elbow pipe assembly (27) is provided with at least two third pipe clamping blocks (271) for positioning and supporting a pipe;

The rotary shaft (24) is also coaxially and fixedly connected with at least two bent pipe guide dies (28), the bent pipe guide dies (28) are provided with annular grooves, the bent pipe guide dies (28) are provided with fifth pipeline clamping blocks (281) parallel to the first pipeline clamping blocks (261), and arc-shaped positioning grooves of the fifth pipeline clamping blocks (281) are tangent to the annular grooves of the bent pipe guide dies (28) connected with the fifth pipeline clamping blocks.

2. The automatic double-film pipe bending machine according to claim 1, wherein the first pipe bending assembly (26) further comprises a first tool frame (262), a first die frame (263) and a first connecting rod assembly (264), the first pipe clamping block (261) is fixedly connected to the first die frame (263), and the first connecting rod assembly (264) is used for driving the first pipe clamping block (261) to act, so that the first pipe clamping block (261) clamps a pipe close to the pipe bending guide die (28) or far away from the pipe bending guide die (28).

3. The automatic double-film bending machine according to claim 2, wherein the first connecting rod assembly (264) comprises a first triangular connecting rod (2641), a first connecting rod (2642), a second connecting rod (2643) and a third connecting rod (2644), one end of the first triangular connecting rod (2641) and the third connecting rod (2644) are hinged on the inner wall of the first tool frame (262), the other end of the third connecting rod (2644) is hinged on the first die frame (263), the other end of the first triangular connecting rod (2641) is hinged with the first connecting rod (2642), the other end of the first connecting rod (2642) is coaxially hinged with the first die frame (263) and the second connecting rod (2643), and the other end of the second connecting rod (2643) is hinged on the inner wall of the first tool frame (262).

4. A double-film automatic pipe bender according to claim 3, wherein the first tooling frame (262) is further hinged with a first driving cylinder (2645), and the end of the telescopic rod of the first driving cylinder (2645) is hinged with a first triangle connecting rod (2641).

5. The automatic double-layer film bending machine according to any one of claims 1 to 4, wherein the second bending assembly (27) comprises a second tool frame (272), a second die frame (273) and a second connecting rod assembly (274), the second die frame (273) is fixedly connected to the second tool frame (272), two or more third pipe clamping blocks (271) are respectively connected to the second die frame (273) in a sliding manner along the X-axis direction, the second connecting rod assembly (274) comprises a fourth connecting rod (2741) and a fifth connecting rod (2742), one end of the fourth connecting rod (2741) is hinged to the inner wall of the second tool frame (272), the other end of the fourth connecting rod is hinged to the fifth connecting rod (2742), and the other end of the fifth connecting rod (2742) is hinged to the bottom of the second die frame (273).

6. The automatic double-film pipe bending machine according to claim 5, wherein a second driving cylinder (2743) is further hinged on the second tool rack (272), and the end of a telescopic rod of the second driving cylinder (2743) is hinged with a fourth connecting rod (2741).

7. The automatic double-film pipe bending machine according to claim 6, further comprising a pipe feeding mechanism (30), wherein a guide rail sliding block mechanism (11) and a rack (12) are slidably arranged on the frame (10) along the X-axis direction, the pipe feeding mechanism (30) comprises a sliding plate (31) connected to the sliding block of the guide rail sliding block mechanism (11), a hollow main shaft (32) for rotationally driving and inserting pipes is slidably arranged on the sliding plate (31) along the Y-axis direction, an elastic multi-clamping jaw structure is arranged at the front end part of the hollow main shaft (32), an outer wall surface of the multi-clamping jaw structure is arranged to be an inclined surface inclined upwards outwards, a sleeve (33) is movably sleeved on the hollow main shaft (32), and the sleeve (33) is used for extruding the inclined surface of the outer wall of the multi-clamping jaw structure when sliding along the end part of the hollow main shaft (32) so that the multi-clamping jaw structure clamps the pipes in the hollow main shaft (32).

8. The automatic double-film pipe bending machine according to claim 7, wherein a third driving cylinder (34) is hinged on the box body of the hollow main shaft (32), the telescopic shaft end of the third driving cylinder (34) is hinged with the sleeve (33), and the third driving cylinder (34) is used for driving the inner wall of the front end of the sleeve (33) to extrude or keep away from the multi-clamping jaw structure of the end of the hollow main shaft (32).

9. The automatic double-layer film pipe bending machine according to claim 8, wherein a second driving motor (35) is further arranged on the sliding plate (31), a gear is fixedly connected to a power output shaft of the second driving motor (35), and the gear is meshed with the rack (12) and used for driving the sliding plate (31) to slide along a guide rail of the guide rail sliding block mechanism to feed pipes.