Pipe bending machine for building engineering construction

Abstract

The invention is suitable for the field of profile forming equipment, and provides a pipe bending machine for building engineering construction, which comprises a machine base platform, two stand columns are arranged on the machine base platform, a driving box body is fixedly connected to the tops of the stand columns, the pipe bending machine further comprises a swing bending assembly, a pipe shaft and two output ends of a shaft body are arranged on the driving box body, and the swing bending assembly is connected with the two output ends of the pipe shaft. The pipe shaft is located on the outer side of the shaft body, the swing bending assembly comprises a plate body fixedly connected with the pipe shaft, a first sliding assembly is arranged on the plate body, a first clamping block is arranged on the first sliding assembly, the swing bending assembly further comprises an incomplete guide wheel fixedly connected with the shaft body, and a limiting clamping groove is formed in the incomplete guide wheel; and each lifting assembly comprises a sliding frame fixed to the machine base platform, a positioning block is fixedly arranged at the top of each sliding frame, a second sliding assembly is arranged on each sliding frame, and a second clamping block is arranged at the top of each second sliding assembly. The bending machine has the beneficial effects that the bending machine can bend the two ends at the same time, so that the problem that a pipe is clamped is effectively solved.

Description

Technical Field

[0001] The invention belongs to the field of profile forming equipment, and in particular relates to a pipe bending machine for construction engineering. Background Art

[0002] Bending machine is an important metal processing equipment, which is widely used in the bending and forming of metal plates and profiles. According to the driving mode, structural form, bending method and application field, bending machine can be divided into many types, such as hydraulic bending machine, mechanical bending machine, CNC bending machine, etc.

[0003] In the field of construction engineering, bending machines are used in many aspects. Some pipes need to be bent into specific shapes for installation. Of course, there are many kinds of pipes used in construction, but the most common ones are round steel pipes and rectangular steel pipes.

[0004] Taking a rectangular steel pipe as an example, in the prior art, one end of the steel pipe is first fixed to a bending machine, and then bent by a bending mechanism at the other end. If the steel pipe has the requirement of bending at both ends at this time, the steel pipe needs to be removed and then installed on the bending machine in another direction. This process obviously shows that there are inconveniences in the use process. Therefore, a pipe bending machine for construction engineering is proposed to solve the above problems. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a pipe bending machine for construction engineering, aiming to solve the problems mentioned in the above background technology.

[0006] The embodiment of the present invention is implemented as follows: a pipe bending machine for construction engineering construction includes a machine base platform, two columns are arranged on the machine base platform at intervals, and a driving box is fixedly connected to the top of the column, and also includes: A swing bending assembly, wherein the swing bending assembly is arranged on two driving housings, wherein the driving housings are provided with two output ends, a tube shaft and a shaft body, wherein the tube shaft is located outside the shaft body, and the rotations of the two are independent of each other, wherein the swing bending assembly comprises a plate body fixedly connected to the tube shaft, wherein the plate body is provided with a first sliding assembly capable of moving along the length direction of the plate body, wherein the first sliding assembly is provided with a first clamping block perpendicular to the moving direction of the first sliding assembly, wherein the swing bending assembly further comprises an incomplete guide wheel fixedly connected to the shaft body, wherein the incomplete guide wheel is provided with a limiting clamping groove in the shape of a superior arc; Two lifting assemblies, the two lifting assemblies are located between two columns, the lifting assemblies include a slide frame vertically arranged and fixed on the machine base platform, a positioning block is fixedly arranged on the top of the slide frame, a second sliding assembly capable of moving in the vertical direction is arranged on the slide frame, a second clamping block is arranged on the top of the second sliding assembly, and the first clamping block, the limiting clamping slot, the positioning block and the second clamping block are all used to limit and fix the pipe; The first clamping block, the incomplete guide wheel, the positioning block and the second clamping block are all located in the same vertical plane.

[0007] Preferably, the plate body is provided with a mounting groove arranged along its length direction, the first sliding assembly comprises a guide rail fixedly arranged in the mounting groove, the first box body is slidably arranged on the guide rail, the first box body is provided with a first driving member driving the first box body to move on the guide rail, and the first clamping block is located at the top of the first box body; The second sliding assembly includes a second box body, one side of the second box body is fixedly connected to a sliding claw that cooperates with the slide, the second box body is provided with a second driving member that drives the second box body to move on the slide, the top of the second box body is fixedly connected to a support frame, and the second card block is fixedly connected to the top of the support frame.

[0008] Preferably, a transversely arranged strip frame is fixedly connected to the top of the first box body, a mounting block is slidably arranged in the strip frame, elastic reset parts are arranged on both sides of the mounting block, and the first clamping block is fixedly connected to the mounting block.

[0009] Preferably, a power box is fixedly connected to one side of the second box body, the two power boxes are located between the two second box bodies, a transmission arm is provided at the output end of the power box body, a driving roller is rotatably provided on the transmission arm, the power box body drives the driving roller to rotate through the transmission arm, and the driving roller and the second clamping block are in the same horizontal plane.

[0010] Preferably, a sub-platform is fixedly connected to one side of the base platform, a plurality of vertically arranged support rods are fixedly connected to the sub-platform, a material box for storing the pipes to be bent is fixedly connected to the top of the support rods, and a feeding mechanism is arranged on the material box. When all the first card blocks and the second card blocks are at the same height and correspond to the position of the material box, the feeding mechanism is used to push the pipes in the material box into the first card blocks and the second card blocks.

[0011] Preferably, the material box includes a horizontally arranged main material box, the length of the main material box is greater than the length of the pipe, one side of the main material box is fixedly connected with an inclined material guide plate, the junction of the main material box and the material guide plate is provided with a feed port, the main material box is provided with a discharge port arranged toward the side of the machine base platform, and the discharge port and the first clamping block and the second clamping block are in the same vertical plane, the feeding mechanism includes a through slide groove opened at the top of the main material box and arranged along the length direction of the main material box, a drive capable of moving laterally is arranged in the through slide groove, and a top claw arranged toward the inside of the main material box is arranged on the driver.

[0012] Preferably, the maximum distance between the main material box and the first clamping block close to the main material box is greater than the maximum rotation radius of the first clamping block.

[0013] Preferably, a discharge assembly is further provided on the side of the base platform away from the column, and the discharge assembly is used to discharge the bent pipe from the first clamping block and the second clamping block and transport it.

[0014] Preferably, the unloading assembly includes a positioning baffle fixedly connected to the other side of the machine base platform, and sliding rods are fixedly connected on both sides of the positioning baffle. The other end of the sliding rod is fixedly connected to the column through a cross frame. The sliding rod is located between the first block and the second block and is itself in an inclined state. The height of the cross frame is greater than the height of the positioning baffle.

[0015] The pipe bending machine for construction engineering provided by the embodiment of the present invention has the following beneficial effects: When the present invention is in use, the first clamping block and the second clamping block are used to jointly carry the pipe placed by the operator. The first sliding assembly and the second sliding assembly can drive the pipe to move up and cooperate with the limit slot and the positioning block of the incomplete guide wheel. Then, the box body is driven to control the plate body to rotate, so that both ends of the pipe can be bent at the same time. Therefore, the bending machine can bend both ends at the same time, and its efficiency is obvious. In addition, due to the shape characteristics of the incomplete guide wheel, the bent pipe is easily stuck in the limit slot and cannot be separated. At this time, the incomplete guide wheel can be controlled to rotate, so that the limit slot and the pipe are gradually separated, thereby effectively solving the problem of the pipe being stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural diagram of a pipe bending machine for construction engineering provided by an embodiment of the present invention; Figure 2 A three-dimensional schematic diagram of the main structure of a pipe bending machine for construction engineering provided by an embodiment of the present invention; Figure 3 A three-dimensional structural diagram of a material box provided in an embodiment of the present invention; Figure 4 A three-dimensional structural diagram of a plate body and a first sliding assembly provided in an embodiment of the present invention; Figure 5 A three-dimensional structural diagram of a second sliding assembly provided in an embodiment of the present invention; Figure 6 A three-dimensional structural diagram of a strip frame provided in an embodiment of the present invention; Figure 7 A schematic diagram of the incomplete guide wheel and the plate body after rotation provided in an embodiment of the present invention.

[0017] In the attached drawings: 1, machine base platform; 2, column; 3, driving box; 4, swing bending assembly; 401, plate; 402, first sliding assembly; 4021, guide rail; 4022, first box; 403, first clamping block; 404, incomplete guide wheel; 405, limit clamping slot; 5, pipe shaft; 6, shaft; 7, lifting assembly; 701, slide; 702, positioning block; 703, second sliding assembly; 7031, second box; 7032, sliding claw; 7033, support Frame; 704, second clamping block; 8, strip frame; 9, mounting block; 10, elastic reset member; 11, power box; 12, transmission arm; 13, driving roller; 14, auxiliary platform; 15, support rod; 16, material box; 1601, main material box; 1602, guide plate; 17, feeding mechanism; 1701, through slide; 1702, driver; 18, discharge port; 19, unloading assembly; 1901, positioning baffle; 1902, slide rod; 1903, cross frame; 20, pipe. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0020] like Figure 1 and Figure 2 As shown, a pipe bending machine for construction engineering provided by an embodiment of the present invention includes a machine base platform 1, two columns 2 are arranged on the machine base platform 1 at intervals, and a driving box 3 is fixedly connected to the top of the column 2, and also includes: A swing bending assembly 4, wherein the swing bending assembly 4 is arranged on two driving housings 3, and the driving housing 3 is provided with two output ends of a tube shaft 5 and a shaft body 6, wherein the tube shaft 5 is located outside the shaft body 6, and the rotations of the two are independent of each other, and the swing bending assembly 4 comprises a plate body 401 fixedly connected to the tube shaft 5, and a first sliding assembly 402 capable of moving along the length direction of the plate body 401 is arranged on the plate body 401, and a first clamping block 403 perpendicular to the moving direction of the first sliding assembly 402 is arranged on the first sliding assembly 402, and the swing bending assembly 4 also comprises an incomplete guide wheel 404 fixedly connected to the shaft body 6, and a limiting clamping groove 405 in the shape of a superior arc is provided on the incomplete guide wheel 404; Two lifting assemblies 7, the two lifting assemblies 7 are located between the two columns 2, the lifting assemblies 7 include a slide 701 vertically arranged and fixed on the base platform 1, a positioning block 702 is fixedly arranged on the top of the slide 701, a second sliding assembly 703 that can move in the vertical direction is arranged on the slide 701, and a second clamping block 704 is arranged on the top of the second sliding assembly 703, and the first clamping block 403, the limiting clamping groove 405, the positioning block 702 and the second clamping block 704 are all used to limit and fix the pipe 20; The first clamping block 403 , the incomplete guide wheel 404 , the positioning block 702 and the second clamping block 704 are all located in the same vertical plane.

[0021] In one embodiment of the present invention, when the present invention is in use, the first clamping block 403 and the second clamping block 704 are used to jointly carry the pipe 20 placed by the operator, and the first sliding assembly 402 and the second sliding assembly 703 can drive the pipe 20 to move up and cooperate with the limit clamping groove 405 and the positioning block 702 of the incomplete guide wheel 404, and then the plate body 401 is controlled to rotate by the driving box body 3, so that the two ends of the pipe 20 can be bent at the same time. Therefore, the bending machine can bend the two ends at the same time, and its efficiency is obvious. In addition, if Figure 7 As shown, due to the shape characteristics of the incomplete guide wheel 404, the bent tube 20 can be easily stuck in the limiting slot 405 and cannot be separated. At this time, the incomplete guide wheel 404 can be controlled to rotate so that the limiting slot 405 and the tube 20 are gradually separated, thereby effectively solving the problem of the tube 20 being stuck.

[0022] In one embodiment of the present invention, Figure 2 , Figure 4 and Figure 5The plate body 401 is provided with an installation groove arranged along its length direction, the first sliding assembly 402 includes a guide rail 4021 fixedly arranged in the installation groove, a first box body 4022 is slidably arranged on the guide rail 4021, a first driving member driving the first box body 4022 to move on the guide rail 4021 is arranged in the first box body 4022, and the first clamping block 403 is located at the top of the first box body 4022; the second sliding assembly 703 includes a second box body 7031, one side of the second box body 7031 is fixedly connected with a sliding claw 7032 matched with the slide 701, and the second box body 7031 is arranged There is a second driving member for driving the second box body 7031 to move on the slide 701, and the top of the second box body 7031 is fixedly connected to a support frame 7033, and the second clamping block 704 is fixedly connected to the top of the support frame 7033. The first driving member and the second driving member can be driven by a motor, and of course, can also be driven by a hydraulic method. Therefore, it is very easy to control the first clamping block 403 and the second clamping block 704 to move on their respective structures, so detailed description is not given. Two motors can be arranged in the driving box body 3, and the two motors are used to drive the tube shaft 5 and the shaft body 6 to rotate respectively.

[0023] like Figure 4 and Figure 6 As shown, as a preferred embodiment of the present invention, a transversely arranged strip frame 8 is fixedly connected to the top of the first box body 4022, a mounting block 9 is slidably arranged in the strip frame 8, elastic reset parts 10 are arranged on both sides of the mounting block 9, and the first clamping block 403 is fixedly connected to the mounting block 9.

[0024] In one case of the present embodiment, when the first clamping block 403 and the incomplete guide wheel 404 cooperate to bend the tube 20, the plate body 401 is rotated, and the first clamping block 403 and the incomplete guide wheel 404 are tightly fitted to the surface of the tube 20, so the contact point between the two surfaces will not be displaced, but the first clamping block 403 needs to rotate to press and bend different positions of the tube 20. Therefore, the above-mentioned structure is set to enable the first clamping block 403 to compensate for lateral displacement, so that the plate body 401 can rotate smoothly, thereby ensuring the bending effect. The elastic reset member 10 can be in the form of a spring, and of course it can also be in the form of an elastic telescopic rod.

[0025] like Figure 5 As shown, as a preferred embodiment of the present invention, one side of the second box body 7031 is fixedly connected with a power box body 11, and the two power boxes 11 are located between the two second box bodies 7031. A transmission arm 12 is provided at the output end of the power box body 11, and a driving roller 13 is rotatably provided on the transmission arm 12. The power box body 11 drives the driving roller 13 to rotate through the transmission arm 12, and the driving roller 13 and the second clamping block 704 are in the same horizontal plane.

[0026] In one case of the present embodiment, a motor can be arranged in the power box 11, and the transmission arm 12 transmits the power of the motor to the driving roller 13. The transmission arm 12 can adopt a chain transmission form, and of course, a gear rotation form. Since the driving roller 13 and the second clamping block 704 are in the same horizontal plane, when the operator places the pipe 20 on the first clamping block 403 and the second clamping block 704, it is actually impossible to ensure whether the lateral position of the pipe 20 is accurate. If the pipe 20 is in an offset state, it will inevitably affect the final bending effect. The position of the pipe 20 can be adjusted by rotating the driving roller 13, thereby ensuring that the pipe 20 can be in a centered position.

[0027] like Figure 1 and Figure 3 As shown, as a preferred embodiment of the present invention, a sub-platform 14 is fixedly connected to one side of the base platform 1, and a plurality of vertically arranged support rods 15 are fixedly connected to the sub-platform 14. A material box 16 for storing the pipes 20 to be bent is fixedly connected to the top of the support rods 15. A feeding mechanism 17 is arranged on the material box 16. When all the first clamping blocks 403 and the second clamping blocks 704 are at the same height and correspond to the positions of the material box 16, the feeding mechanism 17 is used to push the pipes 20 in the material box 16 into the first clamping blocks 403 and the second clamping blocks 704.

[0028] In one case of the present embodiment, the material box 16 includes a horizontally arranged main material box 1601, the length of the main material box 1601 is greater than the length of the pipe 20, one side of the main material box 1601 is fixedly connected with an inclined material guide plate 1602, a feed port is arranged at the junction of the main material box 1601 and the material guide plate 1602, the main material box 1601 is provided with a discharge port 18 arranged toward the side of the machine base platform 1, and the discharge port 18 and the first clamping block 403 and the second clamping block 704 are in the same vertical plane, the feeding mechanism 17 includes a through slide groove 1701 opened at the top of the main material box 1601 and arranged along the length direction of the main material box 1601, a driver 1702 capable of moving laterally is arranged in the through slide groove 1701, and a drive 1702 is arranged on the driver 1702 toward the main material box 1601. The top claw can realize automatic loading of the bending machine through the above structure. First, multiple pipes 20 can be placed on the guide plate 1602. Under the action of gravity, the pipes 20 will enter the main material box 1601 and be neatly arranged. The driver 1702 can be electric or pneumatic. When the driver 1702 moves, the pipe 20 can be pushed out from the discharge port 18 through the top claw and then enter the first block 403 and the second block 704. At this time, it can cooperate with the rotating drive roller 13 to realize that the pipe 20 automatically reaches the accurate horizontal position. In addition, the maximum distance between the main material box 1601 and the first block 403 close to the main material box 1601 is greater than the maximum rotation radius of the first block 403, which can prevent interference between the plate body 401 and the material box 16.

[0029] like Figure 1 and Figure 2 As shown, as a preferred embodiment of the present invention, a discharge assembly 19 is further provided on the side of the base platform 1 away from the column 2, and the discharge assembly 19 is used to discharge the bent pipe 20 from the first block 403 and the second block 704 and transport it.

[0030] In one case of this embodiment, the unloading assembly 19 includes a positioning baffle 1901 fixedly connected to the other side of the machine base platform 1, and sliding rods 1902 are fixedly connected to both sides of the positioning baffle 1901. The other end of the sliding rod 1902 is fixedly connected to the column 2 through a cross frame 1903. The sliding rod 1902 is located between the first block 403 and the second block 704, and is itself in an inclined state. The height of the position of the cross frame 1903 is greater than the height of the position of the positioning baffle 1901. For the sake of convenience, the description is made based on the positions of the first block 403 and the second block 704. When the first block 403 and the second block 704 are at the top, they are in a bending position, and when they are in the middle position, they are in a loading position. At this time, the pipes 20 in the main material box 1601 will be Push to the first clamping block 403 and the second clamping block 704. When the first clamping block 403 and the second clamping block 704 are at the bottom, it is the unloading position. The bending position and the loading position have been explained in the previous text. When the first clamping block 403 and the second clamping block 704 drive the bent tube 20 to move downward, the existence of the slide bar 1902 will cause the tube 20 to directly separate from the two. In this state, the tube 20 will contact the two slide bars 1902, and the bent ends will automatically flip and present a downward facing state. Then the tube 20 will automatically slide to one side for arrangement, and the bent ends of the tube 20 can cooperate with the slide bar 1902 to achieve self-limiting. Through the above supplement, the present bending machine can achieve fully automated bending without the intervention of the operator. In addition, if Figure 7 As shown, the bending machine can also realize another method of unloading. When the tube 20 is bent, it will fall off the incomplete guide wheel 404. At this time, the driving roller 13 will drive the tube 20 to move to the right. When the tube 20 is completely supported by the first clamping block 403 on the right side, the plate 401 can be controlled to rotate so that the first clamping block 403 tilts to one side. At this time, the tube 20 can automatically slide to one side, thereby completing the unloading process.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0032] In the description of the present invention, 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 invention 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 present invention. In addition, the terms "first", "second", and the like are only used 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", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pipe bending machine for construction engineering, comprising a machine base platform (1), two columns (2) are arranged on the machine base platform (1) at intervals, and a driving box (3) is fixedly connected to the top of the column (2), characterized in that: Also includes: A swing bending assembly (4), wherein the swing bending assembly (4) is arranged on two driving housings (3), wherein the driving housings (3) are provided with two output ends, namely a tube shaft (5) and a shaft body (6), wherein the tube shaft (5) is located outside the shaft body (6), and the rotations of the two are independent of each other, wherein the swing bending assembly (4) comprises a plate body (401) fixedly connected to the tube shaft (5), wherein the plate body (401) is provided with a first sliding assembly (402) capable of moving along the length direction of the plate body (401), wherein the first sliding assembly (402) is provided with a first clamping block (403) perpendicular to the moving direction of the first sliding assembly (402), and wherein the swing bending assembly (4) further comprises an incomplete guide wheel (404) fixedly connected to the shaft body (6), wherein the incomplete guide wheel (404) is provided with a limiting clamping groove (405) in the shape of a major arc; Two lifting assemblies (7), the two lifting assemblies (7) are located between the two columns (2), the lifting assemblies (7) include a slide (701) vertically arranged and fixed on the base platform (1), a positioning block (702) is fixedly arranged on the top of the slide (701), a second sliding assembly (703) capable of moving in a vertical direction is arranged on the slide (701), a second clamping block (704) is arranged on the top of the second sliding assembly (703), and the first clamping block (403), the limiting clamping groove (405), the positioning block (702) and the second clamping block (704) are all used to limit and fix the pipe (20); The first clamping block (403), the incomplete guide wheel (404), the positioning block (702) and the second clamping block (704) are all located in the same vertical plane.

2. The pipe bending machine for construction engineering according to claim 1, characterized in that: The plate body (401) is provided with a mounting groove arranged along its length direction, the first sliding assembly (402) comprises a guide rail (4021) fixedly arranged in the mounting groove, a first box body (4022) is slidably arranged on the guide rail (4021), a first driving member for driving the first box body (4022) to move on the guide rail (4021) is arranged in the first box body (4022), and the first clamping block (403) is located at the top of the first box body (4022); The second sliding assembly (703) includes a second box body (7031), one side of the second box body (7031) is fixedly connected with a sliding claw (7032) that cooperates with the slide (701), the second box body (7031) is provided with a second driving member that drives the second box body (7031) to move on the slide (701), the top of the second box body (7031) is fixedly connected with a support frame (7033), and the second clamping block (704) is fixedly connected to the top of the support frame (7033).

3. The pipe bending machine for construction engineering according to claim 2, characterized in that: The top of the first box body (4022) is fixedly connected to a transversely arranged strip frame body (8), a mounting block (9) is slidably arranged inside the strip frame body (8), elastic reset members (10) are arranged on both sides of the mounting block (9), and the first clamping block (403) is fixedly connected to the mounting block (9).

4. The pipe bending machine for construction engineering according to claim 2, characterized in that: A power box (11) is fixedly connected to one side of the second box body (7031), and the two power boxes (11) are located between the two second box bodies (7031). A transmission arm (12) is provided at the output end of the power box body (11), and a driving roller (13) is rotatably provided on the transmission arm (12). The power box body (11) drives the driving roller (13) to rotate through the transmission arm (12), and the driving roller (13) and the second clamping block (704) are in the same horizontal plane.

5. The pipe bending machine for construction engineering according to claim 1, characterized in that: A sub-platform (14) is fixedly connected to one side of the base platform (1), and a plurality of vertically arranged support rods (15) are fixedly connected to the sub-platform (14). A material box (16) for storing the pipes (20) to be bent is fixedly connected to the top of the support rods (15). A feeding mechanism (17) is arranged on the material box (16). When all the first clamping blocks (403) and the second clamping blocks (704) are located at the same height and correspond to the position of the material box (16), the feeding mechanism (17) is used to push the pipes (20) in the material box (16) into the first clamping blocks (403) and the second clamping blocks (704).

6. The pipe bending machine for construction engineering according to claim 5, characterized in that: The material box (16) comprises a main material box (1601) arranged horizontally, the length of the main material box (1601) being greater than the length of the pipe (20), one side of the main material box (1601) being fixedly connected with a material guide plate (1602) arranged obliquely, a material feed port being arranged at the junction of the main material box (1601) and the material guide plate (1602), and a material discharge port (18) arranged toward the side of the machine base platform (1), and the material discharge port (18) is in the same vertical plane as the first clamping block (403) and the second clamping block (704), the feeding mechanism (17) comprises a through slide groove (1701) opened at the top of the main material box (1601) and arranged along the length direction of the main material box (1601), a driver (1702) capable of horizontal movement is arranged in the through slide groove (1701), and a top claw arranged toward the main material box (1601) is arranged on the driver (1702).

7. The pipe bending machine for construction engineering according to claim 6, characterized in that: The maximum distance between the main material box (1601) and the first clamping block (403) close to the main material box (1601) is greater than the maximum rotation radius of the first clamping block (403).

8. The pipe bending machine for construction engineering according to claim 1, characterized in that: A discharge assembly (19) is also provided on the side of the base platform (1) away from the column (2), and the discharge assembly (19) is used to discharge the bent pipe (20) from the first clamping block (403) and the second clamping block (704) and transport it.

9. The pipe bending machine for construction engineering according to claim 8, characterized in that: The unloading assembly (19) comprises a positioning baffle (1901) fixedly connected to the other side of the machine base platform (1), and sliding rods (1902) are fixedly connected to both sides of the positioning baffle (1901), and the other end of the sliding rod (1902) is fixedly connected to the column (2) through a cross frame (1903), and the sliding rod (1902) is located between the first clamping block (403) and the second clamping block (704), and is in an inclined state. The height of the position of the cross frame (1903) is greater than the height of the position of the positioning baffle (1901).

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