Double-layer film automatic pipe bending machine

Abstract

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

Description

Technical Field

[0001] The present application belongs to the technical field of pipe bending machines, and in particular, relates to a double-layer film automatic pipe bending machine. Background Art

[0002] In the traditional pipe processing industry, pipe bending is a basic and important process. This process requires precise bending according to the specifications, materials, and required bending angles and radii of the pipes. Traditional pipe bending machines are mainly of two types: manual and automatic. The operation of manual pipe bending machines mainly relies on the skills and experience of the operator to control the bending angle and shape of the pipe, which is not only inefficient, but also difficult to ensure the accuracy and repeatability of the bending. Although the existing automatic pipe bending machines have improved the shortcomings of manual operation to a certain extent and achieved partial automation of the pipe bending process through mechanical or electronic control, there is a problem that the bending accuracy is difficult to meet high standards. In addition, during the processing of the existing automatic pipe bending machines, only one set of molds can be used, and the bending radius of the processed products is single, which cannot meet the needs of processing multiple bending radii in one clamping. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to solve the deficiencies in the prior art, thereby providing a double-layer film automatic pipe bending machine, aiming to achieve at least one of the following technical effects: one is to improve production efficiency and processing accuracy; the other is to achieve the demand for multi-bending radius processing with one clamping.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A double-layer film automatic pipe bending machine comprises a frame;

[0006] A pipe bending mechanism is provided at one end of the frame, and the pipe bending mechanism includes a head mounting frame, and the head mounting frame is slidably arranged on the frame along the YZ axis, and a first driving motor is arranged on the head mounting frame, and a driving gear is fixedly connected to the power output shaft of the first driving motor;

[0007] The head mounting frame is rotatably connected with a rotating shaft, and the rotating shaft is coaxially fixedly connected with a driven gear meshing with the driving gear;

[0008] The rotating shaft is also fixedly connected with a first bending pipe assembly, the head mounting frame is provided with a second bending pipe assembly, and the action output part of the first bending pipe assembly is provided with at least two first pipe clamps for positioning and supporting the pipe;

[0009] The action output part of the second elbow assembly is provided with at least two third pipe clamps for positioning and supporting the pipe;

[0010] At least two bending guide dies are coaxially fixedly connected to the rotating shaft, an annular groove is provided on the bending guide die, and a fifth pipe clamp block parallel to the first pipe clamp block is provided on the bending guide die, and the arc-shaped positioning groove of the fifth pipe clamp block is tangent to the annular groove of the bending guide die connected to it.

[0011] Preferably, in a double-layer film automatic pipe bending machine of the utility model, the first pipe bending assembly also includes a first tooling frame, a first mold frame and a first connecting rod assembly, the first pipe clamp block is fixedly connected to the first mold frame, and the first connecting rod assembly is used to drive the first pipe clamp block to move so that the first pipe clamp block is close to the pipe bending guide mold to clamp the pipe or away from the pipe bending guide mold.

[0012] Preferably, in a double-layer film automatic pipe bending machine of the utility model, the first connecting rod assembly includes a first triangular connecting rod, a first connecting rod, a second connecting rod and a third connecting rod, one end of the first triangular connecting rod and the third connecting rod are hinged to the inner wall of the first tooling frame, the other end of the third connecting rod is hinged to the first mold frame, the other end of the first triangular connecting rod is hinged to the first connecting rod, the other end of the first connecting rod is coaxially hinged to the first mold frame and the second connecting rod, and the other end of the second connecting rod is hinged to the inner wall of the first tooling frame.

[0013] Preferably, in the double-layer film automatic pipe bending machine of the utility model, a first driving cylinder is also hinged on the first tooling frame, and the end of the telescopic rod of the first driving cylinder is hinged to the first triangular connecting rod.

[0014] Preferably, in a double-layer film automatic pipe bending machine of the utility model, the second pipe bending assembly includes a second tooling frame, a second mold frame and a second connecting rod assembly, the second mold frame is fixedly connected to the second tooling frame, two or more of the third pipe clamps are respectively slidably connected to the second mold frame along the X-axis direction, the second connecting rod assembly includes 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 tooling frame, and the other end is hinged to the fifth connecting rod, and the other end of the fifth connecting rod is hinged to the bottom of the second mold frame.

[0015] Preferably, in the double-layer film automatic pipe bending machine of the utility model, a second driving cylinder is also hinged on the second tooling frame, and the end of the telescopic rod of the second driving cylinder is hinged to the fourth connecting rod.

[0016] Preferably, a double-layer membrane automatic pipe bending machine of the utility model also includes a pipe feeding mechanism, a guide rail slider mechanism and a rack are slidably arranged on the frame along the X-axis direction, the pipe feeding mechanism includes a slide plate connected to the slide plate of the guide rail slider mechanism, a hollow main shaft for rotational driving and inserting pipes is slidably arranged on the slide plate along the Y-axis direction, an elastic multi-jaw structure is arranged at the front end of the hollow main shaft, the outer wall surface of the multi-jaw structure is arranged as an inclined surface inclined outward and upward, a sleeve is movably sleeved on the hollow main shaft, and the sleeve is used to squeeze the outer wall inclined surface of the multi-jaw structure when sliding along the end of the hollow main shaft, so that the multi-jaw structure clamps the pipe in the hollow main shaft.

[0017] Preferably, in a double-layer film automatic pipe bending machine of the utility model, a third driving cylinder is hinged on the box body of the hollow main shaft, the telescopic shaft end of the third driving cylinder is hinged to the sleeve, and the third driving cylinder is used to drive the multi-claw structure of the front end inner wall of the sleeve to squeeze or move away from the end of the hollow main shaft.

[0018] Preferably, in a double-layer film automatic pipe bending machine of the utility model, a second driving motor is also provided on the slide plate, a gear is fixedly connected to the power output shaft of the second driving motor, and the gear is meshed with the rack to drive the slide plate to slide along the guide rail of the guide rail slider mechanism to feed the pipe.

[0019] The beneficial effects of the utility model are:

[0020] (1) The utility model provides two or more sets of different types of bending mechanism clamping dies and fixtures on one machine head, and adjusts the bending mechanism clamping dies and fixtures to align and match with the steel pipe, so as to realize the processing requirements of multiple bending radii of the steel pipe in one processing process, thereby improving the diversity of product processing;

[0021] (2) Compared with the traditional sprocket transmission method, the gear transmission structure provided in the utility model can improve the transmission accuracy, thereby improving the processing accuracy of the bent pipe;

[0022] (3) The gear transmission structure is built into the head mounting frame, which improves the safety of processing. The gear transmission structure is set at a low height, which can reduce the height of the bending processing position and facilitate the loading and unloading of pipes.

[0023] (4) By setting up a pipe bending mechanism and a pipe feeding mechanism, automatic pipe feeding and pipe bending operations are realized, thereby improving production efficiency and processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of the structure of a pipe bending mechanism in an embodiment of the present application;

[0027] Figure 3 is a schematic cross-sectional view of a driving structure of a pipe bending mechanism according to an embodiment of the present application;

[0028] Figure 4 is a schematic cross-sectional structure diagram of a first elbow assembly according to an embodiment of the present application;

[0029] Figure 5 is a schematic cross-sectional structure diagram of a second elbow assembly according to an embodiment of the present application;

[0030] Figure 6 It is a schematic diagram of the structure of the pipe feeding mechanism of an embodiment of the present application;

[0031] Figure 7 Schematic diagram of the cross-sectional structure of the hollow main shaft of an embodiment of the present application;

[0032] The reference numerals in the figure are:

[0033] Frame 10, pipe bending mechanism 20, pipe feeding mechanism 30,

[0034] Guide rail and slider mechanism 11, rack 12, head mounting frame 21, first drive motor 22, driving gear 23, rotating shaft 24, driven gear 25, first bending pipe assembly 26, second bending pipe assembly 27, bending pipe guide die 28, screw drive device 29, slide plate 31, hollow spindle 32, sleeve 33, third drive cylinder 34, second drive motor 35, fourth drive motor 36, spindle mounting seat 37;

[0035] A first pipe clamp block 261, a first tooling frame 262, a first mold frame 263, a first connecting rod assembly 264, a second pipe clamp block 265, a third pipe clamp block 271, a second tooling frame 272, a second mold frame 273, a second connecting rod assembly 274, a fourth driving cylinder 275, a fourth pipe clamp block 276, and a fifth pipe clamp block 281;

[0036] The first triangular 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

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0040] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] Example

[0042] This embodiment provides a double-layer film automatic pipe bending machine, the structure of which is shown in FIG. Figure 1 , including a frame 10, a pipe bending mechanism 20 and a pipe feeding mechanism 30.

[0043] A bending mechanism 20 is provided at one end of the frame 10. Figure 2 and Figure 3 The pipe bending mechanism 20 includes a head mounting frame 21, and guide rail sliders in the Y-axis and Z-axis directions are set between the head mounting frame 21 and the frame 10 to realize the sliding of the head mounting frame 21 in the YZ plane, and a screw drive device 29 in the Y-axis and Z-axis directions is set to drive the head mounting frame 21 to slide in the YZ plane.

[0044] A first drive motor 22 is arranged on the head mounting frame 21, and a power output shaft of the first drive motor 22 is connected to a driving gear 23 through a reducer transmission. A rotating shaft 24 is rotatably connected to the head mounting frame 21, and a driven gear 25 meshing with the driving gear 23 is coaxially fixedly connected to the rotating shaft 24.

[0045] The rotating shaft 24 is also fixedly connected to a first pipe bending assembly 26 and two pipe bending guide molds 28. The first pipe bending assembly 26 includes a first pipe clamp 261, a first tooling frame 262, a first mold frame 263, a first connecting rod assembly 264 and a second pipe clamp 265. The first pipe clamp 261 and the second pipe clamp 265 are fixedly connected to the first mold frame 263 in parallel. The first pipe clamp 261 and the second pipe clamp 265 are both provided with arc-shaped clamping grooves for positioning and clamping steel pipes. The first connecting rod assembly 264 is used to drive the first mold frame 263 to move, so that the first pipe clamp 261 and the second pipe clamp 265 are close to the pipe bending guide mold 28 to clamp the pipe or away from the pipe bending guide mold 28.

[0046] Preferably, a double-layer film automatic tube bending machine of this embodiment, referring to Figure 4 The first link assembly 264 includes a first triangular link 2641, a first link 2642, a second link 2643 and a third link 2644, one end of the first triangular link 2641 and the third link 2644 are hinged to the inner wall of the first tooling frame 262, the other end of the third link 2644 is hinged to the first mold frame 263, the other end of the first triangular link 2641 is hinged to the first link 2642, the other end of the first link 2642 is coaxially hinged to the first mold 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 tooling frame 262.

[0047] Preferably, in the double-layer film automatic pipe bending machine of this embodiment, a first driving cylinder 2645 is further hinged on the first tooling frame 262 , and the end of the telescopic rod of the first driving cylinder 2645 is hinged to the first triangular connecting rod 2641 .

[0048] Preferably, in a double-layer film automatic pipe bending machine of the present embodiment, the pipe bending guide mold 28 is set to a roller shape, and the pipe bending guide mold 28 is provided with annular grooves for clamping pipes along the circumference of its outer wall, which are respectively a first annular groove and a second annular groove. A notch is also provided on each of the two pipe bending guide molds 28, and a fifth pipe clamp 281 is fixedly connected to the notch. The fifth pipe clamp 281 is parallel to the first pipe clamp 261, and the arc-shaped positioning groove provided on the fifth pipe clamp 281 is tangentially connected to the first annular groove or the second annular groove connected thereto, and is used to clamp the pipe when the first pipe clamp 261, the second pipe clamp 265 and the fifth pipe clamp 281 are molded together.

[0049] Preferably, in a double-layer membrane automatic pipe bending machine of the present embodiment, a second pipe bending assembly 27 is also fixedly connected to the machine head mounting frame 21. In the present embodiment, the action output portion of the second pipe bending assembly 27 is slidably provided along the X-axis direction with a third pipe clamp 271 and a fourth pipe clamp 276 for positioning and supporting the pipe.

[0050] Preferably, a double-layer film automatic tube bending machine of this embodiment, referring to Figure 5 The second elbow assembly 27 includes a second tooling frame 272, a second mold frame 273 and a second connecting rod assembly 274. The second mold frame 273 is fixedly connected to the second tooling frame 272. The third pipe clamp 271 and the fourth pipe clamp 276 are slidably installed on the second mold frame 273 along the X-axis direction. A fourth driving cylinder 275 for driving the third pipe clamp 271 and the fourth pipe clamp 276 to slide on the second mold frame 273 along the X-axis direction is respectively arranged between the third pipe clamp 271 and the fourth pipe clamp 276 and the second mold frame 273. The second connecting rod assembly 274 includes 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 tooling frame 272, and the other end is hinged to the fifth connecting rod 2742. The other end of the fifth connecting rod 2742 is hinged to the bottom of the second mold frame 273.

[0051] Preferably, in the double-layer film automatic pipe bending machine of this embodiment, a second driving cylinder 2743 is further hinged on the second tooling frame 272 , and the end of the telescopic rod of the second driving cylinder 2743 is hinged to the fourth connecting rod 2741 .

[0052] It should be noted that the arc-shaped positioning groove on the third pipe clamp 271 is at the same height as the annular groove on the bending pipe guide mold 28, and the arc-shaped positioning groove on the first pipe clamp 261 is at the same height as the annular groove on the bending pipe guide mold 28 under the push of the first driving cylinder 2645 and is aligned with the arc-shaped positioning groove of the fifth pipe clamp 281 to clamp the pipe.

[0053] Preferably, a double-layer film automatic tube bending machine of this embodiment, referring to Figure 1 , Figure 6 and Figure 7 , also includes a pipe feeding mechanism 30, a guide rail slider mechanism 11 and a rack 12 are slidably arranged on the frame 10 along the X-axis direction, the pipe feeding mechanism 30 includes a slide plate 31 connected to the slide block of the guide rail slider mechanism 11, a spindle mounting seat 37 is slidably arranged on the slide plate 31 along the Y-axis direction through the guide rail slider, a hollow spindle 32 is rotatably installed in the spindle mounting seat 37, the hollow spindle 32 is used for rotational driving and inserting pipes, the front end of the hollow spindle 32 is connected with an elastically deformable multi-jaw structure, the thickness of the multi-jaw structure near the end direction is gradually thickened, so that the outer wall of the multi-jaw structure forms an upward inclined surface, and a sleeve 33 is movably sleeved on the hollow spindle 32, and the sleeve 33 is used to squeeze the multi-jaw structure when sliding along the end of the hollow spindle 32, so that the multi-jaw structure clamps the pipe in the hollow spindle 32.

[0054] A fourth drive motor 36 is also provided above the hollow main shaft 32 , and a synchronous belt reduction transmission mechanism is provided between the power output shaft of the fourth drive motor 36 and the hollow main shaft 32 , so that the fourth drive motor 36 drives the hollow main shaft 32 to rotate and adjust the bending direction of the pipe.

[0055] Preferably, in a double-layer film automatic pipe bending machine of the present embodiment, a third driving cylinder 34 is hinged on the box body of the hollow main shaft 32, and the telescopic shaft end of the third driving cylinder 34 is hinged to the sleeve 33. The third driving cylinder 34 is used to drive the multi-claw structure of the front end inner wall of the sleeve 33 to squeeze or move away from the end of the hollow main shaft 32.

[0056] Preferably, in a double-layer film automatic pipe bending machine of the present embodiment, a second drive motor 35 is also provided on the slide plate 31, and a gear is fixedly connected to the power output shaft of the second drive motor 35, and the gear is engaged with the rack 12 to drive the slide plate 31 to slide along the guide rail of the guide rail slider mechanism to feed the pipe.

[0057] In actual operation, the pipe to be bent is inserted into the hollow main shaft 32 by a manipulator or manually. In this embodiment, the pipe refers to a steel pipe. The third driving cylinder 34 drives the inner wall of the front end of the sleeve 33 to squeeze the multi-claw structure so that the steel pipe is clamped. The second driving motor 35 rotates to drive the slide plate 31 to move away from the pipe bending mechanism 20 to the initial bending position.

[0058] The screw drive device 29 drives the head mounting frame 21 upward, so that the arc-shaped positioning groove of the fourth pipe clamp block 276 is aligned with the steel pipe, and the second drive cylinder 2743 and the first drive cylinder 2645 extend to push the fourth pipe clamp block 276 and the second pipe clamp block 265 closer to the bending guide die 28, respectively, so that the pipe is pressed tightly against the second annular groove of the bending guide die 28;

[0059] The first driving motor 22 rotates, and through the driving gear 23 and the driven gear 25, the driving shaft 24 rotates, thereby driving the first bending assembly 26 and the bending guide die 28 to rotate synchronously, so as to realize the bending action of the steel pipe. The bending angle of the steel pipe can be adjusted by adjusting the rotation amount of the first driving motor 22;

[0060] Subsequently, the fourth pipe clamp 276 and the second pipe clamp 265 return to their original positions, the second drive motor 35 rotates to drive the slide plate 31 to move close to the pipe bending mechanism 20 to the required length of the steel pipe bending section, the fourth drive motor 36 drives the hollow main shaft 32 to rotate, adjusts the bending direction of the steel pipe, the screw drive device 29 drives the head mounting frame 21 downward, so that the arc-shaped positioning groove of the third pipe clamp 271 is aligned with the steel pipe, the second drive cylinder 2743 and the first drive cylinder 2645 extend to move, respectively push the third pipe clamp 271 and the first pipe clamp 261 close to the pipe bending guide die 28, and press the pipe tightly into the first annular groove of the pipe bending guide die 28;

[0061] Repeat the above clamping and bending actions until the bending action is completed.

[0062] Based on the above ideal embodiments of this application, the relevant staff can make various changes and modifications without departing from the technical concept of this application through the above description. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A double-layer film automatic pipe bending machine, characterized in that: comprising a frame (10); A pipe bending mechanism (20) is provided at one end of the frame (10), and the pipe bending mechanism (20) comprises a head mounting frame (21), and the head mounting frame (21) is slidably arranged on the frame (10) along the YZ axis, and a first driving motor (22) is arranged on the head mounting frame (21), and a driving gear (23) is fixedly connected to the power output shaft of the first driving motor (22); The head mounting frame (21) is rotatably connected to a rotating shaft (24), and the rotating shaft (24) is coaxially fixedly connected to a driven gear (25) meshing with the driving gear (23); The rotating shaft (24) is also fixedly connected to 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 portion of the first pipe bending assembly (26) is provided with at least two first pipe clamping blocks (261) for positioning and supporting the pipe. The action output portion of the second pipe bending assembly (27) is provided with at least two third pipe clamping blocks (271) for positioning and supporting the pipe; At least two pipe bending guide dies (28) are coaxially fixedly connected to the rotating shaft (24), the pipe bending guide dies (28) are provided with an annular groove, the pipe bending guide dies (28) are provided with a fifth pipe clamping block (281) parallel to the first pipe clamping block (261), and the arc-shaped positioning groove of the fifth pipe clamping block (281) is tangent to the annular groove of the pipe bending guide dies (28) to which it is connected.

2. The double-layer film automatic pipe bending machine according to claim 1, characterized in that: The first pipe bending assembly (26) further comprises a first tooling 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); the first connecting rod assembly (264) is used to drive the first pipe clamping block (261) to move so that the first pipe clamping block (261) is close to the pipe bending guide die (28) to clamp the pipe or is away from the pipe bending guide die (28).

3. The double-layer film automatic pipe bending machine according to claim 2, characterized in that: The first link assembly (264) includes a first triangular link (2641), a first link (2642), a second link (2643) and a third link (2644), one end of the first triangular link (2641) and the third link (2644) are hinged to the inner wall of the first tooling frame (262), the other end of the third link (2644) is hinged to the first mold frame (263), the other end of the first triangular link (2641) is hinged to the first link (2642), the other end of the first link (2642) is coaxially hinged to the first mold 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 tooling frame (262).

4. The double-layer film automatic pipe bending machine according to claim 3, characterized in that: The first tooling frame (262) is also hinged with a first driving cylinder (2645), and the end of the telescopic rod of the first driving cylinder (2645) is hinged with the first triangular connecting rod (2641).

5. A double-layer film automatic pipe bending machine according to any one of claims 1 to 4, characterized in that: The second pipe bending assembly (27) comprises a second tooling frame (272), a second mold frame (273) and a second connecting rod assembly (274); the second mold frame (273) is fixedly connected to the second tooling frame (272); two or more third pipe clamps (271) are respectively slidably connected to the second mold frame (273) 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 tooling frame (272), and the other end is hinged to the fifth connecting rod (2742); the other end of the fifth connecting rod (2742) is hinged to the bottom of the second mold frame (273).

6. The double-layer film automatic pipe bending machine according to claim 5, characterized in that: A second driving cylinder (2743) is also hinged on the second tooling frame (272), and the end of the telescopic rod of the second driving cylinder (2743) is hinged to the fourth connecting rod (2741).

7. The double-layer film automatic pipe bending machine according to claim 6, characterized in that: The invention also comprises a pipe feeding mechanism (30), wherein a guide rail slider mechanism (11) and a rack (12) are slidably arranged on the frame (10) along the X-axis direction, and the pipe feeding mechanism (30) comprises a slide plate (31) connected to the slide plate of the guide rail slider mechanism (11), and a hollow main shaft (32) for rotationally driving and inserting pipes is slidably arranged on the slide plate (31) along the Y-axis direction, and an elastic multi-claw structure is arranged at the front end of the hollow main shaft (32), and the outer wall surface of the multi-claw structure is arranged as an inclined surface inclined outwardly and upwardly, and a sleeve (33) is movably sleeved on the hollow main shaft (32), and when the sleeve (33) slides along the end of the hollow main shaft (32), it is used to press the outer wall inclined surface of the multi-claw structure, so that the multi-claw structure clamps the pipe in the hollow main shaft (32).

8. The double-layer film automatic pipe bending machine according to claim 7, characterized in that: A third driving cylinder (34) is hingedly connected to the housing of the hollow main shaft (32), and the end of the telescopic shaft of the third driving cylinder (34) is hingedly connected to the sleeve (33). The third driving cylinder (34) is used to drive the inner wall of the front end of the sleeve (33) to squeeze or move away from the multi-claw structure of the end of the hollow main shaft (32).

9. The double-layer film automatic pipe bending machine according to claim 8, characterized in that: The slide plate (31) is also provided with a second drive motor (35), and a gear is fixedly connected to the power output shaft of the second drive motor (35), and the gear is meshed with the rack (12) to drive the slide plate (31) to slide along the guide rail of the guide rail slider mechanism to feed the pipe.

Images