Pipe positioning device of semi-automatic bending machine
By designing the pipe positioning device for feeding, transverse movement, lifting and rotating components on the semi-automatic bending machine, the problem of manual position adjustment of traditional pipe bending machines is solved, and efficient multi-directional bending and pipe processing adapted to different pipe diameters is achieved.
Patent Information
- Application Number
- CN202422569624.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-23
AI Technical Summary
Traditional semi-automatic pipe bending machines need to manually adjust the position and replace the clamping structure during the pipe bending process, resulting in inefficiency and difficulty in adapting to pipe fittings of different pipe diameters.
A semi-automatic bending machine pipe positioning device is designed, including feed, transverse movement, lifting and rotating components, which can automatically adjust the position and direction of the clamping components, and realize stable clamping and multi-directional bending of pipe fittings of different sizes.
The pipe bending operation is simplified, processing efficiency is improved, manual intervention is reduced, and the needs of different pipe diameters and bending directions are adapted.
Smart Images
Figure CN223234918U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pipe processing, in particular to a pipe positioning device of a semi-automatic bending machine. Background Art
[0002] Metal pipes are tubular materials made from metal. Through various processing techniques, they can be transformed into metal fittings with different functions. They are a key component of many industrial machinery. During the metal pipe processing process, depending on the application, the pipes are often bent. This involves bending a straight pipe into a curved pipe with a certain curvature according to the production process requirements. Therefore, pipe bending machines play a vital role in the pipe bending process.
[0003] Pipe bending machines come in many different configurations. They can be categorized as cold or hot pipe bending machines based on whether or not heating is used during bending. They can be divided into four types based on transmission: manual, pneumatic, mechanical, and hydraulic. And they can be divided into four types based on control: manual, semi-automatic, automatic, and CNC. Semi-automatic or fully automatic pipe bending machines are suitable for mass production, offer reasonable equipment costs, and are relatively widely used across the industry. In traditional processing, pipe bending machines are mostly semi-automatic.
[0004] Before using a semi-automatic pipe bender to bend pipe fittings, it is first necessary to position the pipe. Only after the position of the pipe is fixed can it be accurately bent. However, the common devices used for pipe positioning are some simple clamping structures. When the pipe is bent in one direction and needs to be bent in another direction, the operator is required to manually adjust the direction of the pipe. When the pipe needs to be bent at different positions, the operator is still required to manually adjust the position of the pipe. The entire adjustment process is time-consuming and labor-intensive, which greatly reduces the efficiency of the pipe bending process. In addition, when using a semi-automatic pipe bender to bend pipe fittings of different diameters, in order to adapt to pipe fittings of different outer diameters, the bending device needs to be replaced. In order to ensure that the pipe fitting can be accurately inserted into the replaced bending device, the position of the clamping structure needs to be adjusted. This adjustment process is relatively complicated and often requires the staff to disassemble the clamping structure and then reinstall it. Therefore, it is urgent to design a pipe positioning device for a semi-automatic bending machine to solve the above problems. Utility Model Content
[0005] The present invention aims to solve the technical problems existing in the prior art and provides a pipe positioning device for a semi-automatic bending machine with a rational structural design. The present invention can adjust the position of a clamped pipe as needed, thereby bending pipes of different sizes. At the same time, it can drive the clamped pipe to rotate and feed, thereby facilitating bending operations in different directions at different positions of the pipe, and the operation process is simple and convenient.
[0006] The technical solution adopted by the utility model to solve the technical problems existing in the known technology is as follows: a pipe positioning device of a semi-automatic bending machine includes a frame, a feed mounting seat is movably mounted on the frame, and also includes a feed assembly for driving the feed mounting seat to move laterally along the axial direction of the pipe to be processed; a lifting positioning seat is movably mounted on the feed mounting seat, and also includes a transverse assembly for driving the lifting positioning seat to move laterally and a lifting assembly for driving the lifting positioning seat to move up and down, the direction of the lateral movement of the lifting positioning seat is perpendicular to the lateral movement direction of the feed mounting seat; a clamping assembly is installed on the lifting positioning seat for clamping the pipe, the clamping assembly includes a clamping base fixed to the lifting positioning seat, an inner pipe sleeve structure is rotatably connected to the clamping base, a clamping claw mechanism is installed at the end of the inner pipe sleeve structure, an outer push pipe structure is sleeved on the inner pipe sleeve structure, and also includes a push-pull drive mechanism for driving the outer push pipe structure to move along the axial direction of the inner pipe sleeve structure, for controlling the opening and closing of the clamping claw mechanism; and also includes a rotating assembly installed on the lifting positioning seat for driving the pipe clamped by the clamping claw mechanism to rotate.
[0007] The advantages and positive effects of the present invention are as follows: the present invention provides a pipe positioning device for a semi-automatic bending machine, which can stably clamp the pipe to be clamped by setting a clamping assembly; by setting a transverse movement assembly and a lifting assembly, the position of the clamping assembly can be adjusted according to the position of the bending device to be used, thereby aligning the center of the clamped pipe with the center of the bending device, so that the subsequent bending operation can be carried out smoothly, without the need for manual position adjustment by the staff, and the adjustment process is simple and fast; by setting a rotating assembly, the pipe clamped by the clamping assembly can be driven to rotate, thereby facilitating bending of the pipe in different directions; by setting a feeding assembly, the pipe clamped by the clamping assembly can be driven to move along its axial direction, thereby facilitating bending of the pipe at different positions. The present invention can adjust the position of the clamped and fixed pipe in space as needed, thereby performing bending operations on pipes of different sizes, and can also perform bending processing in different directions at different positions of the pipe, and the operation process is simple.
[0008] Preferably: the feed assembly includes a feed base installed on the frame, a plurality of feed guide rails arranged laterally are fixed to the feed base, and the feed mounting seat is slidably connected to the feed guide rails through a slider; it also includes a feed screw rotatably connected to the feed base and arranged parallel to the feed guide rails, and the feed mounting seat is connected to the feed screw through a nut screwed on the feed screw; it also includes a feed motor for driving the feed screw to rotate.
[0009] Preferably: the transverse movement assembly includes multiple groups of transverse movement guide rails fixedly arranged laterally on the feed mounting seat, and the transverse movement guide rails are arranged perpendicular to the feed guide rails; it also includes a transverse movement mounting seat slidingly connected to the transverse movement guide rails through a slider, and also includes a transverse movement driving member installed on the feed mounting seat, which is used to drive the transverse movement mounting seat to move along the transverse movement guide rails.
[0010] Preferably: the lifting assembly includes multiple sets of longitudinally arranged lifting guide rails fixed on the transverse mounting seat, the lifting positioning seat is slidably connected to the lifting guide rails through a slider, and also includes a lifting drive member fixed on the transverse mounting seat, which is used to drive the lifting positioning seat to move up and down along the lifting guide rails.
[0011] Preferably: the clamping mechanism includes a clamping jaw mounting sleeve fixed to the end of the inner tube sleeve structure, and a plurality of groups of pipe clamping jaws distributed in a circumferential direction are pivotally connected to the clamping jaw mounting sleeve, and a pipe clamping head with a V-shaped groove on the inner side surface can be detachably installed at the outer end of each pipe clamping jaw; a clamping jaw tension spring is installed between each pipe clamping jaw and the outer tube pushing structure; an arc surface with a diameter gradually increasing from the inside to the outside is provided on the outer wall of each pipe clamping jaw, and the arc surface is in friction contact with the outer port of the outer tube pushing structure.
[0012] Preferably: the push-pull drive mechanism includes a hinged seat installed on the clamping base, a push-pull drive member is pivotally connected to the hinged seat, a push-pull fork is pivotally connected to the protruding end of the push-pull drive member, and two sets of push-pull guide wheels arranged opposite to each other are installed at the end of the push-pull fork, and each push-pull guide wheel is located in a guide wheel groove with an annular structure opened on the outer peripheral wall of the outer push tube structure.
[0013] Preferably, the rotating assembly includes a rotating motor installed on the lifting and positioning seat, and a rotating pulley pair is installed between the output shaft of the rotating motor and the inner pipe sleeve structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the top view of the structure of the utility model;
[0015] Figure 2 It is a three-dimensional structural diagram of the transverse moving component and the lifting component in the utility model;
[0016] Figure 3 It is a three-dimensional structural diagram of the clamping assembly and the rotating assembly in the utility model;
[0017] Figure 4 yes Figure 3 AA cross-sectional structural diagram in;
[0018] Figure 5 It is a three-dimensional structural diagram of the feeding assembly in the utility model.
[0019] In the figure: 1. Transverse movement assembly; 1-1. Transverse movement guide rail; 1-2. Transverse movement driving member; 1-3. Transverse movement mounting seat; 2. Feed mounting seat; 3. Lifting assembly; 3-1. Lifting driving member; 3-2. Lifting mounting member; 3-3. Lifting guide rail; 3-4. Limiting screw; 4. Rotating assembly; 4-1. Rotating pulley pair; 4-2. Rotating motor; 5. Lifting positioning seat; 6. Clamping assembly; 6-1. Clamping base; 6-2. Inner sleeve structure; 6-3. Push-pull driving mechanism; 6-3-1. Push-pull driving member; 6-3-2. Push-pull guide wheel; 6-3-3, guide wheel groove; 6-3-4, push-pull fork; 6-4, external push tube structure; 6-4-1, external tube body; 6-4-2, accommodating notch; 6-4-3, guide strip hole; 6-5, clamping jaw mechanism; 6-5-1, clamping head; 6-5-2, clamping jaw; 6-5-3, internal guide sleeve; 6-5-4, clamping jaw tension spring; 6-5-5, clamping jaw mounting sleeve; 7, frame; 8, feed assembly; 8-1, feed motor; 8-2, feed screw; 8-3, feed guide rail; 8-4, feed base. DETAILED DESCRIPTION
[0020] In order to further understand the content, features and effects of the present invention, the following embodiments are given to explain in detail:
[0021] See Figure 1 The pipe positioning device of the semi-automatic bending machine of the present invention includes a frame 7, on which a feed mounting seat 2 is movably mounted, and also includes a feed assembly 8 for driving the feed mounting seat 2 to move laterally along the axial direction of the pipe to be processed.
[0022] like Figure 5 As shown, the feed assembly 8 includes a feed base 8-4 mounted on the frame 7, a plurality of transversely arranged feed guide rails 8-3 fixedly connected to the feed base 8-4, a feed mounting seat 2 slidably connected to the feed guide rails 8-3 via a slider; a feed screw 8-2 rotatably connected to the feed base 8-4 and arranged parallel to the feed guide rails 8-3, the feed mounting seat 2 being connected to the feed screw 8-2 via a nut screwed on the feed screw 8-2; and a feed motor 8-1 for driving the feed screw 8-2 to rotate. The feed guide rails 8-3 extend in a direction parallel to the axial direction of the pipe to be processed.
[0023] like Figure 1As shown, a lifting and positioning seat 5 is movably installed on the feed mounting seat 2, and also includes a transverse movement component 1 for driving the lifting and positioning seat 5 to move laterally and a lifting component 3 for driving the lifting and positioning seat 5 to move up and down. The direction of the lateral movement of the lifting and positioning seat 5 is perpendicular to the lateral movement direction of the feed mounting seat 2.
[0024] See further Figure 2 The above-mentioned transverse movement assembly 1 includes multiple sets of transverse movement guide rails 1-1 fixedly arranged laterally on the feed mounting seat 2, and the transverse movement guide rails 1-1 are arranged perpendicularly to the feed guide rails 8-3; it also includes a transverse movement mounting seat 1-3 that is slidably connected to the transverse movement guide rails 1-1 through a slider, and also includes a transverse movement driving member 1-2 installed on the feed mounting seat 2, which is used to drive the transverse movement mounting seat 1-3 to move along the transverse movement guide rails 1-1. Among them, the above-mentioned transverse movement driving member 1-2 adopts a linear cylinder, the cylinder barrel of the cylinder is connected to the feed mounting seat 2 through a mounting seat, and the protruding end of the cylinder is connected to the L-shaped connecting block installed on the transverse movement mounting seat 1-3; in addition, in order to limit the transverse movement position of the transverse movement mounting seat 1-3, a limit block is installed on the feed mounting seat 2, and a limit screw arranged laterally is screwed on the limit block. In addition, the above-mentioned transverse movement mounting seat 1-3 includes a vertically arranged bottom plate and a vertical plate, and the protruding end of the transverse movement driving member 1-2 is connected to the above-mentioned bottom plate.
[0025] like Figure 2 As shown, the lifting assembly 3 includes a plurality of longitudinally arranged lifting guide rails 3-3 fixedly attached to the transverse mounting seat 1-3, a lifting and positioning seat 5 slidably connected to the lifting guide rails 3-3 via a slider, and a lifting drive 3-1 fixedly attached to the transverse mounting seat 1-3 for driving the lifting and positioning seat 5 to move up and down along the lifting guide rails 3-3. The lifting drive 3-1 is a linear cylinder. The lifting assembly 3 also includes a lifting mounting member 3-2 fixedly attached to the back of the lifting and positioning seat 5, the extended end of the lifting drive 3-1 being connected to the lifting mounting member 3-2, and a limit screw 3-4 threadedly engaged with the top of the transverse mounting seat 1-3 for limiting the lifting position of the lifting mounting member 3-2.
[0026] In order to clamp and fix the pipe fittings, Figure 1 As shown, a clamping assembly 6 is installed on the lifting and positioning seat 5 for clamping the pipe. Figure 3 The above-mentioned clamping assembly 6 includes a clamping base 6-1 fixed on the lifting and positioning seat 5, an inner tube sleeve structure 6-2 is rotatably connected to the clamping base 6-1, a clamping claw mechanism 6-5 is installed at the end of the inner tube sleeve structure 6-2, an outer push tube structure 6-4 is sleeved on the inner tube sleeve structure 6-2, and also includes a push-pull driving mechanism 6-3 for driving the outer push tube structure 6-4 to move along the axial direction of the inner tube sleeve structure 6-2, which is used to control the opening and closing of the clamping claw mechanism 6-5.
[0027] like Figure 4 As shown, the above-mentioned inner pipe sleeve structure 6-2 includes a pipe sleeve rotatably connected to the clamping base 6-1 through a rolling bearing, the inner diameter of the pipe sleeve is larger than the outer diameter of the pipe to be processed, the clamping mechanism 6-5 is installed at the inner end of the above-mentioned pipe sleeve, and also includes a flared guide sleeve installed at the outer end of the pipe sleeve.
[0028] like Figure 4 As shown, the clamping mechanism 6-5 includes a clamping jaw mounting sleeve 6-5-5 fixed to the end of the inner tube sleeve structure 6-2, and a plurality of groups of pipe clamping jaws 6-5-2 distributed in a circumferential direction are pivotally connected to the clamping jaw mounting sleeve 6-5-5. Furthermore, an open groove is provided at the outer end of the clamping jaw mounting sleeve 6-5-5, and the inner end of the pipe clamping jaw 6-5-2 is inserted into the above-mentioned open groove and pivotally connected to the clamping jaw mounting sleeve 6-5-5 through a pin shaft; a pipe clamping jaw 6-5-2 can be detachably mounted on the outer end of each pipe clamping jaw 6-5-2. Head 6-5-1, a V-shaped groove adapted to the pipe fitting is opened on the inner side surface of each clamping head 6-5-1; a clamping claw spring 6-5-4 is installed between each clamping claw 6-5-2 and the outer tube structure 6-4. To facilitate the installation of the clamping claw spring 6-5-4, screws are installed near the pivot end of each clamping claw 6-5-2, and screws corresponding to the above-mentioned screws are installed on the outer tube structure 6-4. The two ends of the above-mentioned clamping claw spring 6-5-4 are respectively hung on the corresponding two screws.
[0029] It is noteworthy that the outer wall of each clamping jaw 6-5-2 is provided with an arcuate surface with a gradually increasing diameter from the inside to the outside. This arcuate surface frictionally contacts the outer end of the push-tube structure 6-4. In addition, the clamping jaw mechanism 6-5 also includes an internal guide sleeve 6-5-3 threadedly mounted on the outer end of the clamping jaw mounting sleeve 6-5-5. The internal guide sleeve 6-5-3 is located between the multiple sets of clamping heads 6-5-1.
[0030] like Figure 3 and Figure 4 As shown, the above-mentioned push-out tube structure 6-4 includes an outer tube body 6-4-1 sleeved on the inner tube sleeve structure 6-2, and an accommodating groove 6-4-2 corresponding to the above-mentioned clamping claw tension spring 6-5-4 is provided on the outer peripheral wall of the outer tube body 6-4-1. The above-mentioned accommodating groove 6-4-2 plays the role of avoiding the clamping claw tension spring 6-5-4, thereby ensuring that the clamping claw tension spring 6-5-4 can work normally; a guide strip hole 6-4-3 extending along its axial direction is provided on the outer tube body 6-4-1, and a screw passing through the above-mentioned guide strip hole 6-4-3 is installed on the outer wall of the inner tube sleeve structure 6-2, and a guide sleeve member slidingly matched with the guide strip hole 6-4-3 is sleeved on the screw.
[0031] See further Figure 3The push-pull drive mechanism 6-3 comprises an articulated seat mounted on the clamping base 6-1, on which a push-pull drive member 6-3-1 is pivotally connected. A push-pull fork 6-3-4 is pivotally connected to the protruding end of the push-pull drive member 6-3-1. Two sets of push-pull guide wheels 6-3-2 are mounted opposite each other at the ends of the push-pull fork 6-3-4. Each push-pull guide wheel 6-3-2 is located within an annular guide wheel groove 6-3-3 formed on the outer peripheral wall of the outer push tube structure 6-4. In addition, an articulated seat is mounted on the top of the push-pull fork 6-3-4, and a Y-shaped articulated joint is mounted on the protruding end of the push-pull drive member 6-3-1. The Y-shaped articulated joint is pivotally connected to the articulated seat via a pin.
[0032] like Figure 1 As shown, this embodiment further includes a rotating assembly 4 mounted on the lifting and positioning seat 5, which is used to drive the pipe clamped by the clamping mechanism 6-5 to rotate. Figure 3 The rotating assembly 4 includes a rotating motor 4-2 mounted on a lifting and positioning seat 5. A rotating pulley pair 4-1 is installed between the output shaft of the rotating motor 4-2 and the inner tube sleeve structure 6-2. The rotating pulley pair 4-1 includes a driving pulley keyed to the output shaft of the rotating motor 4-2 and a driven pulley mounted on the tube sleeve of the inner tube sleeve structure 6-2. A belt is connected between the driving pulley and the driven pulley.
[0033] Working principle:
[0034] In the initial state, the piston rod of the push-pull driving member 6-3-1 extends, causing the multiple sets of pipe clamping jaws 6-5-2 in the clamping mechanism 6-5 to open and wait for the pipe to be clamped;
[0035] When bending the pipe, the pipe is inserted into the inner pipe sleeve structure 6-2, and then the push-pull drive member 6-3-1 is activated to retract its piston rod, and the push-pull fork 6-3-4 and the guide wheel groove 6-3-3 push the outer pipe structure 6-4, so that the multiple groups of pipe clamping jaws 6-5-2 in the clamping mechanism 6-5 are closed and clamp the pipe to be bent.
[0036] Then, the position of the clamping assembly 6 is adjusted according to the position of the bending device to be used, that is, the lateral position of the clamping assembly 6 is adjusted by the transverse driving member 1-2, and the longitudinal position of the clamping assembly 6 is adjusted by the lifting driving member 3-1, so that the center of the pipe clamped by the clamping assembly 6 is aligned with the center of the bending device to be used, so as to facilitate the smooth performance of the subsequent bending operation;
[0037] During the actual working process, the rotating motor 4-2 can be started to drive the inner pipe sleeve structure 6-2, the outer pushing pipe structure 6-4 and the clamping mechanism 6-5 to rotate synchronously by rotating the pulley pair 4-1, thereby driving the clamping mechanism 6-5 to rotate the clamped pipe fitting, thereby facilitating the bending of the pipe fitting in different directions; when the clamping assembly 6 clamps the pipe fitting, the feed motor 8-1 in the feed assembly 8 is started, which can drive the pipe fitting clamped by the clamping assembly 6 to move forward and backward along the axial direction, thereby facilitating the bending of different positions of the pipe fitting, and realizing the operation of bending processing in different directions at different positions of the pipe fitting.
Claims
1. A pipe positioning device for a semi-automatic bending machine, characterized by: The machine comprises a frame (7), a feed mounting seat (2) being movably mounted on the frame (7), and a feed assembly (8) for driving the feed mounting seat (2) to move laterally along the axial direction of the pipe to be processed; a lifting and positioning seat (5) being movably mounted on the feed mounting seat (2), and a transverse movement assembly (1) for driving the lifting and positioning seat (5) to move laterally and a lifting assembly (3) for driving the lifting and positioning seat (5) to move up and down, wherein the direction of the transverse movement of the lifting and positioning seat (5) is perpendicular to the transverse movement direction of the feed mounting seat (2); a clamping assembly (6) is mounted on the lifting and positioning seat (5) for clamping the pipe, and the clamping assembly (6) The invention comprises a clamping base (6-1) fixedly connected to a lifting and positioning seat (5), an inner tube sleeve structure (6-2) rotatably connected to the clamping base (6-1), a clamping claw mechanism (6-5) installed at the end of the inner tube sleeve structure (6-2), an outer tube pushing structure (6-4) sleeved on the inner tube sleeve structure (6-2), a push-pull driving mechanism (6-3) for driving the outer tube pushing structure (6-4) to move along the axial direction of the inner tube sleeve structure (6-2), and for controlling the opening and closing of the clamping claw mechanism (6-5); and a rotating assembly (4) installed on the lifting and positioning seat (5) for driving the pipe fitting clamped by the clamping claw mechanism (6-5) to rotate.
2. The pipe positioning device for a semi-automatic bending machine according to claim 1, characterized in that: The feed assembly (8) includes a feed base (8-4) mounted on a frame (7), a plurality of feed guide rails (8-3) arranged transversely fixed to the feed base (8-4), a feed mounting seat (2) slidably connected to the feed guide rails (8-3) via a slider; a feed screw (8-2) rotatably connected to the feed base (8-4) and arranged parallel to the feed guide rails (8-3), the feed mounting seat (2) being connected to the feed screw (8-2) via a nut screwed on the feed screw (8-2); and a feed motor (8-1) for driving the feed screw (8-2) to rotate.
3. The pipe positioning device for a semi-automatic bending machine according to claim 2, characterized in that: The transverse movement assembly (1) comprises a plurality of transverse movement guide rails (1-1) fixedly arranged transversely on a feed mounting seat (2), wherein the transverse movement guide rails (1-1) are arranged perpendicularly to the feed guide rails (8-3); a transverse movement mounting seat (1-3) slidably connected to the transverse movement guide rails (1-1) via a slider; and a transverse movement driving member (1-2) mounted on the feed mounting seat (2) for driving the transverse movement mounting seat (1-3) to move along the transverse movement guide rails (1-1).
4. The pipe positioning device for a semi-automatic bending machine according to claim 1, characterized in that: The lifting assembly (3) includes a plurality of longitudinally arranged lifting guide rails (3-3) fixedly connected to the transverse mounting seat (1-3), a lifting positioning seat (5) slidably connected to the lifting guide rails (3-3) via a slider, and also includes a lifting drive member (3-1) fixedly connected to the transverse mounting seat (1-3) for driving the lifting positioning seat (5) to move up and down along the lifting guide rails (3-3).
5. The pipe positioning device for a semi-automatic bending machine according to claim 1, characterized in that: the clamping claw The mechanism (6-5) comprises a clamping jaw mounting sleeve (6-5-5) fixedly connected to the end of the inner tube sleeve structure (6-2); a plurality of groups of pipe clamping jaws (6-5-2) distributed in a circumferential direction are pivotally connected to the clamping jaw mounting sleeve (6-5-5); a pipe clamping head (6-5-1) with a V-shaped groove on the inner side surface is detachably mounted on the outer end of each pipe clamping jaw (6-5-2); a clamping jaw tension spring (6-5-4) is installed between each pipe clamping jaw (6-5-2) and the outer tube pushing structure (6-4); and an arcuate surface with a diameter gradually increasing from the inside to the outside is provided on the outer wall of each pipe clamping jaw (6-5-2), and the arcuate surface is in frictional contact with the outer end of the outer tube pushing structure (6-4).
6. The pipe positioning device for a semi-automatic bending machine according to claim 1, characterized in that: The push-pull drive mechanism (6-3) includes an articulated seat mounted on a clamping base (6-1), a push-pull drive member (6-3-1) pivotally connected to the articulated seat, a push-pull fork (6-3-4) pivotally connected to the protruding end of the push-pull drive member (6-3-1), and two sets of push-pull guide wheels (6-3-2) arranged opposite to each other are mounted on the end of the push-pull fork (6-3-4), and each push-pull guide wheel (6-3-2) is located in a guide wheel groove (6-3-3) in an annular structure opened on the outer peripheral wall of the outer push tube structure (6-4).
7. The pipe positioning device for a semi-automatic bending machine according to claim 1, characterized in that: The rotating assembly (4) comprises a rotating motor (4-2) mounted on a lifting and positioning seat (5), and a rotating pulley pair (4-1) is mounted between the output shaft of the rotating motor (4-2) and the inner sleeve structure (6-2).