A fixing jig for bending pipe machining

Abstract

This utility model discloses a fixing fixture for pipe bending, including a fixing platform. A notch is provided at the rear end of the upper surface of the fixing platform, and an adjustable sliding seat is provided inside the notch. Evenly distributed fixing rods are fixedly connected to the front end of both the upper surface of the fixing platform and the front end of the upper surface of the sliding seat. Limiting wheels are rotatably connected to the upper ends of the outer surfaces of the fixing rods. The fixture also includes a vertical limiting mechanism and a driving mechanism. The vertical limiting mechanism includes a fixing chamber, a rotating shaft, a rotating cylinder, a rotating handle one, a rotating handle two, a limiting frame, and a limiting ball. The fixing chambers are symmetrically fixedly connected to the front end of the upper surface of the fixing platform and the front end of the upper surface of the sliding seat, respectively. A rotating shaft rotatably connects two horizontally adjacent fixing chambers. This fixing fixture for pipe bending can provide horizontal limiting for refrigeration pipes of different diameters while also providing corresponding oblique centering limiting, further ensuring the stability of the refrigeration pipes during the fixing and conveying process.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, specifically a fixing fixture for pipe bending. Background Technology

[0002] Refrigeration equipment is a mechanical device that uses the principle of refrigeration cycle to transfer heat and create a low-temperature environment. It is widely used in daily life, industrial production, commercial operation and scientific research. Refrigeration equipment completes the four stages of "compression, condensation, throttling and evaporation" by circulating refrigerant in four core components: compressor, condenser, expansion valve and evaporator. This achieves the directional transfer of heat from a low-temperature environment to a high-temperature environment. The refrigeration pipe body is an important connecting device for the internal circulation of refrigeration equipment. In the prior art, patent CN217165952U discloses an automatic pipe bending device, including a workbench, a cutting machine fixedly installed on the upper surface of the workbench, a driving device provided below the workbench, and a bending roller provided above the workbench on the left side of the cutting machine via the driving device, with a fixing block fixed on one side of the outer edge surface of the bending roller. The tube fixing fixture of this automatic tube bending equipment has certain problems. For example, it can only achieve lateral limiting and fixing of the refrigeration tube, but lacks vertical limiting of the refrigeration tube. It cannot ensure that the central axis of the tube is always on the same horizontal plane as the center of the bending plate, which affects the bending accuracy of the refrigeration tube. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a fixing fixture for pipe bending, which can limit the refrigeration pipes of different diameters laterally while providing corresponding oblique centering limits, further ensuring the stability of the refrigeration pipes during the fixed transmission process, and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a fixing fixture for pipe bending, comprising a fixing table, a notch provided at the rear end of the upper surface of the fixing table, an adjustable sliding seat provided inside the notch, and evenly distributed fixing rods fixedly connected to the front end of the upper surface of the fixing table and the front end of the upper surface of the sliding seat, and a limit wheel rotatably connected to the upper end of the outer surface of the fixing rods, and further comprising a vertical limiting mechanism and a driving mechanism. Vertical limiting mechanism: It includes a fixed compartment, a rotating shaft, a rotating cylinder, a rotating handle one, a rotating handle two, a limiting frame, and limiting balls. The fixed compartments are symmetrically fixedly connected to the front end of the upper surface of the fixed platform and the front end of the upper surface of the sliding seat. A rotating shaft is rotatably connected between two horizontally adjacent fixed compartments. Rotating handle two is fixedly connected to both ends of the outer surface of the rotating shaft. A rotating cylinder is rotatably connected inside each fixed compartment. The rotating cylinder is movably sleeved on the outer surface of the adjacent rotating shaft. A rotating handle one is fixedly connected to the end of the outer arc surface of the rotating cylinder near the center of the fixed platform. A limiting frame is fixedly connected between two horizontally adjacent rotating handle one and between two horizontally adjacent rotating handle two. A limiting ball is rotatably connected inside the limiting frame. Drive mechanism: It is located on the right side surface of the two fixed compartments on the right side, away from the center of the fixed platform. It can limit the refrigeration tubes of different diameters laterally, while providing corresponding oblique centering limit, further ensuring the stability of the refrigeration tubes during the fixed transmission process.

[0005] Furthermore, the vertical limiting mechanism also includes a drive gear and a drive shaft. The drive shaft is rotatably connected to the end of the right side surface of the two fixed chambers on the right side away from the center of the fixed platform. The left end of each drive shaft is fixedly connected to a drive gear, and the right end of each drive shaft is fixedly connected to a driven gear. The driven gears are meshed with the adjacent drive gears. The right end of each rotating cylinder is fixedly connected to a driven internal gear ring, which is meshed with the adjacent drive gear, providing driving force for the relative rotation of the two vertically adjacent limiting mechanisms.

[0006] Furthermore, the outer arc surface of the fixed chamber is provided with symmetrically distributed scale bars, and the middle part of the surface of the rotating handle one and rotating handle two away from the center of the fixed platform is provided with an indicator arrow. The indicator arrows are installed in conjunction with the adjacent scale bars to observe the movement status of the limit frame.

[0007] Furthermore, the driving mechanism includes a driving cylinder, a rib groove, and a limiting plate. The limiting plate is fixedly connected to the right end of the driving shaft. The right end of the driving shaft is provided with a rib groove. The driving cylinder is slidably connected to the outer surface of the two driving shafts on the right side. The inside of the driving cylinder is fixedly connected with a rib. The rib is slidably connected to the adjacent rib groove to provide driving force for the rotation of the driving shaft.

[0008] Furthermore, the drive mechanism also includes a fixed cylinder, a toothed groove, and teeth. The fixed cylinders are all fixedly connected to the right side surface of the two fixed chambers on the right side away from the center of the fixed platform. The drive shafts all pass through the adjacent fixed cylinders. The inner walls of the fixed cylinders are provided with evenly distributed toothed grooves. The left end of the outer surface of the drive cylinders is fixedly connected with evenly distributed teeth. The teeth are all installed in conjunction with the adjacent toothed grooves to lock the position of the drive shaft.

[0009] Furthermore, a controller is provided on the left end of the upper surface of the fixed platform. The input terminal of the controller is electrically connected to an external power supply to control various electrical appliances.

[0010] Furthermore, symmetrically distributed guide rods are fixedly connected inside the recess, and symmetrically distributed sliding openings are provided inside the sliding seat. The interior of each sliding opening is slidably connected to the outer surface of the adjacent guide rod. An electric push rod is provided in the middle of the rear surface of the fixed platform. The telescopic end of the electric push rod is fixedly connected to the rear end of the sliding seat, and the input end of the electric push rod is electrically connected to the output end of the controller to provide driving force for the movement of the sliding seat.

[0011] Furthermore, a working chamber is provided at the lower end of the fixed platform, a laser rangefinder is provided at the upper end of the rear surface of the working chamber, a laser reflector is provided at the lower end of the sliding seat, the laser reflector and the laser rangefinder are longitudinally aligned, and the laser rangefinder is bidirectionally electrically connected to the controller to provide information assistance for the movement of the sliding seat.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This fixing fixture for pipe bending has the following advantages: While the limiting wheels achieve lateral limiting and fixing of refrigeration tubes of different diameters, the gear mechanism realizes the relative movement of two vertically adjacent limiting frames, thereby adding four oblique fixing and limiting forces to the refrigeration tubes. Within the adjustable range of the limiting frames, lateral limiting of refrigeration tubes of different diameters is achieved, while providing corresponding oblique centering limiting, further ensuring the stability of the refrigeration tubes during the fixed transmission process, making the refrigeration tubes more stable during the limiting process, and facilitating the precise bending of the refrigeration tubes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the internal structure of this utility model; Figure 3 This is a cross-sectional view of the rear side of the present invention; Figure 4 This is an enlarged structural diagram of point A in this utility model; Figure 5 This is a cross-sectional view of the vertical limiting mechanism of this utility model; Figure 6 This is an enlarged structural diagram of section B of the present invention; Figure 7 This is an enlarged structural diagram of point C in this utility model; Figure 8 This is a schematic diagram of the left side of the vertical limiting mechanism on the left side of this utility model.

[0014] In the diagram: 1. Fixed platform, 2. Notch, 3. Vertical limiting mechanism, 31. Fixed chamber, 32. Rotating shaft, 33. Rotating cylinder, 34. Rotating handle one, 35. Rotating handle two, 36. Limiting frame, 37. Limiting ball, 38. Drive gear, 39. Drive shaft, 4. Drive mechanism, 41. Fixed cylinder, 42. Drive cylinder, 43. Gear groove, 44. Tooth, 45. Rib groove, 46. Limiting plate, 5. Guide rod, 6. Sliding seat, 7. Electric push rod, 8. Fixed rod, 9. Limiting wheel, 10. Working chamber, 11. Laser rangefinder, 12. Controller, 13. Scale bar. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-8 This embodiment provides a technical solution: a fixing fixture for pipe bending, including a fixing table 1, a notch 2 is provided at the rear end of the upper surface of the fixing table 1, an adjustable sliding seat 6 is provided inside the notch 2, and evenly distributed fixing rods 8 are fixedly connected to the front end of the upper surface of the fixing table 1 and the front end of the upper surface of the sliding seat 6, and the upper end of the outer surface of the fixing rods 8 is rotatably connected to a limiting wheel 9, and also includes a vertical limiting mechanism 3 and a driving mechanism 4; Vertical limiting mechanism 3: It includes a fixed chamber 31, a rotating shaft 32, a rotating cylinder 33, a rotating handle 34, a rotating handle 35, a limiting frame 36, and a limiting ball 37. The fixed chambers 31 are symmetrically fixedly connected to the front end of the upper surface of the fixed platform 1 and the front end of the upper surface of the sliding seat 6, respectively. A rotating shaft 32 is rotatably connected between two horizontally adjacent fixed chambers 31. Rotating handles 35 are fixedly connected to the left and right ends of the outer surface of the rotating shaft 32. A rotating cylinder 33 is rotatably connected inside each fixed chamber 31. The central axes of horizontally adjacent rotating shafts 32 and rotating cylinders 33 coincide, and the rotating shaft 32 is rotatably connected to the rotating cylinder 33. The central axis of 2, the centerline of the limiting wheel 9, and the central axis of the refrigeration pipe are on the same horizontal plane. The rotating cylinder 33 is movably sleeved on the outer surface of the adjacent rotating shaft 32. The end of the outer arc surface of the rotating cylinder 33 near the center of the fixed platform 1 is fixedly connected to a rotating handle 34. A limiting frame 36 is fixedly connected between two horizontally adjacent rotating handles 34 and between two horizontally adjacent rotating handles 35. The limiting frame 36 is rotatably connected to evenly distributed limiting balls 37. The vertical limiting mechanism 3 also includes a drive gear 38 and a drive shaft 39. The drive shaft 39 is rotatably connected to the vertical limiting mechanism 3. Two fixed chambers 31 on the right side are connected to the ends of their right surfaces away from the center of the fixed platform 1. The left ends of the two drive shafts 39 are each fixedly connected to drive gears 38. The right ends of the rotating shafts 32 are each fixedly connected to driven gears, which mesh with adjacent drive gears 38. The right end of the rotating cylinder 33 is each fixedly connected to a driven internal gear ring, which meshes with adjacent drive gears 38. Symmetrically distributed scale bars 13 are provided on the outer arc surfaces of the fixed chambers 31. The middle of the surfaces of the rotating handles 34 and 35 on the side away from the center of the fixed platform 1 is provided with… Indicator arrows are provided, and each indicator arrow is installed in conjunction with the adjacent scale bar 13. (Let a be the distance from the central axis of the rotating shaft 32 to the far point of rotating handle 34 and rotating handle 35, let c be the angle between rotating handle 34 and rotating handle 35 and the horizontal plane containing the central axis of the rotating shaft 32, and let b be the straight-line distance from the far point of rotating handle 34 and rotating handle 35 to the horizontal plane containing the central axis of the rotating shaft 32, where b = a * sinc. Within the range of c, b can be quantified to obtain the real-time position status of the limit frame 36 and the limit ball 37.) Drive mechanism 4: It is respectively located on the right side surface of the two fixed chambers 31 on the right side away from the center of the fixed platform 1. Drive mechanism 4 includes drive cylinder 42, rib groove 45 and limiting plate 46. The limiting plate 46 is fixedly connected to the right end of drive shaft 39. The right end of the drive shaft 39 is provided with rib groove 45. Drive cylinder 42 is slidably connected to the outer surface of the two drive shafts 39 on the right side. Ribs are fixedly connected inside the drive cylinder 42. The ribs are slidably connected to the adjacent rib groove 45. Drive mechanism 4 also includes fixed cylinder 41, tooth groove 43 and tooth 44. Fixed cylinder 41 is fixedly connected to the right side surface of the two fixed chambers 31 on the right side away from the center of the fixed platform 1. Drive shaft 39 passes through the adjacent fixed cylinder 41. The walls are provided with evenly distributed toothed grooves 43, and the left end of the outer surface of the drive cylinder 42 is fixedly connected with evenly distributed teeth 44. The teeth 44 are installed in conjunction with the adjacent toothed grooves 43. First, the vertical limiting mechanism 3 on the front side is adjusted, and the front drive cylinder 42 is slid to the right. The front drive cylinder 42 slides to the right on the outer surface of the adjacent drive shaft 39. At the same time, the ribs inside the drive cylinder 42 move to the right inside the corresponding rib grooves 45. The teeth 44 on the left end of the outer arc surface of the front drive cylinder 42 are inserted into the toothed grooves 43 inside the adjacent fixed cylinder 41, thereby ending the limiting of the front drive cylinder 42. Then, the front drive cylinder 42 is rotated. During the rotation of the front drive cylinder 42, the ribs inside the front drive cylinder 42 are all inserted into the toothed grooves 43 inside the adjacent fixed cylinder 41. The adjacent rib grooves 45 cause the front drive shaft 39 to rotate along with the adjacent drive cylinder 42. The rotation of the front drive shaft 39 drives the front drive gear 38 to rotate, which in turn drives the front driven gear to rotate. The driven gear then drives the front rotating shaft 32 to rotate. The upward rotation of the front rotating shaft 32 drives the two adjacent rotating handles 35 to rotate upward. The upward rotation of the two rotating handles 35 drives the adjacent limit frame 36 to rotate upward. Simultaneously, the rotation of the drive gear 38 drives the front driven internal gear ring to rotate, which in turn drives the adjacent rotating cylinder 33 to rotate. The downward rotation of the rotating cylinder 33 drives the corresponding rotating handle 34 to rotate downward. The two rotating handles 34 on the front rotate downward. The corresponding limiting bracket 36 rotates downward around the central axis of the front rotating shaft 31. The two front limiting brackets 36 move towards each other, causing the internal limiting balls 37 to move closer to the center of the refrigeration tube. When the limiting balls 37 contact the refrigeration tube, the rotation of the drive cylinder 42 stops, and the front drive cylinder 42 slides to the left. The teeth 44 at the left end of the front drive cylinder 42 are inserted into the corresponding grooves 43 inside the front fixed cylinder 41, thereby locking the vertical position of the drive cylinder 42 and preventing it from rotating. This, in turn, locks the position of the drive shaft 39, and thus locks the position of the front vertical limiting mechanism 3. The rear vertical limiting mechanism 3 is adjusted according to the above principle so that the limiting balls 37 are in contact with the refrigeration tube.Four oblique and concentric limiting forces are added to the refrigeration tube body to further ensure the stability of the fixed limiting of the refrigeration tube body. At the same time, the scale inside the scale bar 13 that is in the same horizontal plane as the corresponding indicator arrow can be observed, which is the straight-line distance of the current limiting bracket 36 relative to the horizontal plane where the central axis of the refrigeration tube body is located; Wherein: A controller 12 is provided on the left end of the upper surface of the fixed platform 1, and the input terminal of the controller 12 is electrically connected to an external power supply; The recess 2 has symmetrically distributed guide rods 5 fixedly connected inside. The sliding seat 6 has symmetrically distributed sliding openings inside. The interior of each sliding opening is slidably connected to the outer surface of the adjacent guide rod 5. The guide rods 5 provide sliding support for the sliding seat 6, preventing the telescopic end of the electric push rod 7 from being subjected to a force perpendicular to the axis and preventing the telescopic end of the electric push rod 7 from bending. The electric push rod 7 is located in the middle of the rear surface of the fixed platform 1. The telescopic end of the electric push rod 7 is fixedly connected to the rear end of the sliding seat 6. The input end of the electric push rod 7 is electrically connected to the output end of the controller 12. Next, based on the diameter of the refrigeration tube body to be bent, the controller 12 first activates the electric push rod 7. The extension end of the electric push rod 7 extends and pushes the sliding seat 6 forward under the guidance of the two guide rods 5. The forward movement of the sliding seat 6 drives the four fixed rods 8 on the rear side to move forward. The forward movement of the four fixed rods 8 on the rear side drives the adjacent limit wheels 9 to move forward. The four limit wheels 9 on the rear side move forward and support each other with the four limit wheels 9 on the front side, thereby achieving lateral limit fixation of the refrigeration tube body without affecting the transmission of the refrigeration tube body. The fixed platform 1 has a working chamber 10 at its lower end, a laser rangefinder 11 at the upper end of the rear surface of the working chamber 10, and a laser reflector at the lower end of the sliding seat 6. The laser reflector and the laser rangefinder 11 are longitudinally aligned. The laser rangefinder 11 is bidirectionally electrically connected to the controller 12. During the forward movement of the sliding seat 6, the controller 12 enables the laser rangefinder 11 to operate. The laser emitted by the laser rangefinder 11 is reflected when it reaches the laser reflector at the lower end of the sliding seat 6. The probe of the laser rangefinder 11 receives the reflected laser. The time it takes for the laser to reflect back to the laser rangefinder 11 is combined with the speed of light to calculate the real-time distance of the sliding seat 6. This allows the limiting wheel 9 to stably limit the refrigeration tube of the corresponding diameter without damaging the refrigeration tube due to excessive squeezing force.

[0017] The working principle of the pipe bending fixture provided by this utility model is as follows: During operation, the operator first places the fixed platform 1, the working chamber 10, and other mechanisms stably in the horizontal working area. After stable placement, the operator, according to the diameter of the refrigeration pipe to be bent, first uses the controller 12 to activate the electric push rod 7. The extension end of the electric push rod 7 extends and pushes the sliding seat 6 forward under the guidance of the two guide rods 5. The forward movement of the sliding seat 6 drives the four fixed rods 8 on the rear side to move forward. The forward movement of the four fixed rods 8 on the rear side drives the adjacent limiting wheels 9 to move forward. The four limiting wheels 9 on the rear side move forward and support each other with the four limiting wheels 9 on the front side, realizing the lateral limiting and fixing of the refrigeration pipe. The transmission of the cooling tube is not affected. During the forward movement of the sliding seat 6, the controller 12 enables the laser rangefinder 11 to operate. The laser emitted by the laser rangefinder 11 is reflected when it reaches the laser reflector at the lower end of the sliding seat 6. The probe of the laser rangefinder 11 receives the reflected laser. The time it takes for the laser to reflect back to the laser rangefinder 11 is combined with the speed of light to calculate the real-time distance of the sliding seat 6. This allows the limiting wheel 9 to stably limit the cooling tube of the corresponding diameter without damaging the cooling tube due to excessive pressure. Then, the operator first adjusts the front vertical limiting mechanism 3 and slides the front drive cylinder 42 to the right. The front drive cylinder 42 slides to the right on the outer surface of the adjacent drive shaft 39, while driving... The ribs inside cylinder 42 all move to the right within their corresponding rib grooves 45. The teeth 44 on the left end of the outer arc surface of the front drive cylinder 42 all engage with the tooth grooves 43 inside the adjacent fixed cylinder 41, thus ending the limiting position of the front drive cylinder 42. Then, the operator rotates the front drive cylinder 42. During the rotation, since the ribs inside the front drive cylinder 42 all penetrate the adjacent rib grooves 45, the front drive shaft 39 rotates along with the adjacent drive cylinder 42. The rotation of the front drive shaft 39 drives the front drive gear 38 to rotate, the rotation of the front drive gear 38 drives the front driven gear to rotate, and the rotation of the front driven gear drives the front rotating shaft 32 to rotate. The front rotating shaft 32 rotates upward. The rotation of the two adjacent rotating handles 35 causes them to rotate upwards. The upward rotation of the two front rotating handles 35 causes the adjacent limiting brackets 36 to rotate upwards. At the same time, the rotation of the drive gear 38 causes the front driven internal gear ring to rotate. The rotation of the front driven internal gear ring causes the adjacent rotating cylinder 33 to rotate. The downward rotation of the rotating cylinder 33 causes the corresponding rotating handle 34 to rotate downwards. The downward rotation of the two front rotating handles 34 causes the corresponding limiting brackets 36 to rotate downwards around the central axis of the front rotating shaft 31. The two front limiting brackets 36 move towards each other, causing the internal limiting ball 37 to move closer to the center of the refrigeration tube body. When the limiting ball 37 contacts the refrigeration tube body, the rotation of the drive cylinder 42 stops, and the front drive cylinder 42 slides to the left.The teeth 44 on the left end of the front drive cylinder 42 are inserted into the corresponding grooves 43 inside the front fixed cylinder 41, locking the vertical position of the drive cylinder 42 so that it cannot rotate, thereby locking the position of the drive shaft 39, and thus locking the position of the front vertical limiting mechanism 3. Following the same principle, the rear vertical limiting mechanism 3 is adjusted so that the limiting balls 37 are in contact with the refrigeration tube, adding four oblique and concentric limiting forces to the refrigeration tube, further ensuring the stability of the fixed limiting of the refrigeration tube. Simultaneously, personnel can observe the scale markings inside the scale bar 13 that are on the same horizontal plane as the corresponding indicator arrows, which represents the straight-line distance of the current limiting frame 36 relative to the horizontal plane containing the central axis of the refrigeration tube.

[0018] It is worth noting that the controller 12 disclosed in the above embodiments can be an S7-300, the laser rangefinder 11 can be an LDM301, and the controller 12 controls the operation of the electric push rod 7 and the laser rangefinder 11 using methods commonly used in the prior art.

[0019] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A fixing fixture for pipe bending, comprising a fixing table (1), a notch (2) provided at the rear end of the upper surface of the fixing table (1), an adjustable sliding seat (6) provided inside the notch (2), and evenly distributed fixing rods (8) fixedly connected to the front end of the upper surface of the fixing table (1) and the front end of the upper surface of the sliding seat (6), and limit wheels (9) rotatably connected to the upper end of the outer surface of the fixing rods (8), characterized in that: It also includes a vertical limiting mechanism (3) and a driving mechanism (4); Vertical limiting mechanism (3): It includes a fixed chamber (31), a rotating shaft (32), a rotating cylinder (33), a rotating handle one (34), a rotating handle two (35), a limiting frame (36), and a limiting ball (37). The fixed chambers (31) are symmetrically fixedly connected to the front end of the upper surface of the fixed platform (1) and the front end of the upper surface of the sliding seat (6). A rotating shaft (32) is rotatably connected between two horizontally adjacent fixed chambers (31). A rotating handle two is fixedly connected to the left and right ends of the outer surface of the rotating shaft (32). 35), the interior of the fixed chamber (31) is rotatably connected to a rotating cylinder (33), the rotating cylinder (33) is movably sleeved on the outer surface of the adjacent rotating shaft (32), the outer arc surface of the rotating cylinder (33) is fixedly connected to a rotating handle (34) at one end near the center of the fixed platform (1), and a limit frame (36) is fixedly connected between two horizontally adjacent rotating handles (34) and between two horizontally adjacent rotating handles (35), and a limit ball (37) is rotatably connected inside the limit frame (36). Drive mechanism (4): It is located on the right side of the two fixed chambers (31) at the end away from the center of the fixed platform (1).

2. The fixing fixture for pipe bending according to claim 1, characterized in that: The vertical limiting mechanism (3) also includes a drive gear (38) and a drive shaft (39). The drive shaft (39) is rotatably connected to the end of the right side surface of the two fixed chambers (31) on the right side away from the center of the fixed platform (1). The left end of each of the two drive shafts (39) is fixedly connected to a drive gear (38). The right end of each rotating shaft (32) is fixedly connected to a driven gear. The driven gears are meshed with the adjacent drive gears (38). The right end of each rotating cylinder (33) is fixedly connected to a driven internal gear ring. The driven internal gear rings are meshed with the adjacent drive gears (38).

3. The fixing fixture for pipe bending according to claim 1, characterized in that: The outer arc surface of the fixed chamber (31) is provided with symmetrically distributed scale bars (13). The center of the surface of the rotating handle one (34) and rotating handle two (35) away from the center of the fixed platform (1) is provided with an indicator arrow. The indicator arrows are installed in conjunction with the adjacent scale bars (13).

4. A fixing fixture for pipe bending according to claim 2, characterized in that: The drive mechanism (4) includes a drive cylinder (42), a rib groove (45), and a limiting plate (46). The limiting plate (46) is fixedly connected to the right end of the drive shaft (39). The right end of the drive shaft (39) is provided with a rib groove (45). The drive cylinder (42) is slidably connected to the outer surface of the two drive shafts (39) on the right side. The inside of the drive cylinder (42) is fixedly connected with ribs, and the ribs are slidably connected to the adjacent rib groove (45).

5. A fixing fixture for pipe bending according to claim 4, characterized in that: The drive mechanism (4) further includes a fixed cylinder (41), a toothed groove (43) and a tooth (44). The fixed cylinder (41) is fixedly connected to the right side surface of the two fixed chambers (31) on the right side away from the center of the fixed platform (1). The drive shaft (39) passes through the adjacent fixed cylinder (41). The inner wall of the fixed cylinder (41) is provided with evenly distributed toothed grooves (43). The left end of the outer surface of the drive cylinder (42) is fixedly connected with evenly distributed teeth (44). The teeth (44) are installed in conjunction with the adjacent toothed grooves (43).

6. A fixing fixture for pipe bending according to claim 1, characterized in that: A controller (12) is provided on the left end of the upper surface of the fixed platform (1), and the input end of the controller (12) is electrically connected to an external power source.

7. A fixing fixture for pipe bending according to claim 6, characterized in that: The recess (2) is fixedly connected with symmetrically distributed guide rods (5), and the sliding seat (6) is provided with symmetrically distributed sliding openings. The interior of each sliding opening is slidably connected to the outer surface of the adjacent guide rod (5). An electric push rod (7) is provided in the middle of the rear surface of the fixed platform (1). The telescopic end of the electric push rod (7) is fixedly connected to the rear end of the sliding seat (6), and the input end of the electric push rod (7) is electrically connected to the output end of the controller (12).

8. A fixing fixture for pipe bending according to claim 6, characterized in that: The lower end of the fixed platform (1) is provided with a working chamber (10), the upper end of the rear surface of the working chamber (10) is provided with a laser rangefinder (11), the lower end of the sliding seat (6) is provided with a laser reflector, the laser reflector and the laser rangefinder (11) are longitudinally aligned, and the laser rangefinder (11) is bidirectionally electrically connected to the controller (12).

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